Version 0.2.12.0

Fix for #321

.gitignore

@@ -1,3 +1,4 @@
+.DS_Store
 db
 dist
 .cabal-sandbox
@@ -5,3 +6,6 @@ cabal.sandbox.config
 hscope.out
 codex.tags
 .anvil
+.stack-work
+tags
+site

CHANGELOG.md

@@ -0,0 +1,86 @@
+# Change Log
+
+All notable changes to this project will be documented in this file.
+This project adheres to [Semantic Versioning](http://semver.org/).
+
+## [0.2.12.0] - 2015-10-25
+
+### Added
+- Embed associations, e.g. `/film?select=*,director(*)` - @ruslantalpa
+- Filter columns, e.g. `?select=col1,col2` - @ruslantalpa
+- Does not execute the count total if header "Prefer: count=none" - @diogob
+
+### Fixed
+- Tolerate a missing role in user creation - @calebmer
+- Avoid unnecessary text re-encoding - @ruslantalpa
+
+## [0.2.11.1] - 2015-09-01
+
+### Fixed
+- Accepts `*/*` in Accept header - @diogob
+
+## [0.2.11.0] - 2015-08-28
+### Added
+- Negate any filter in a uniform way, e.g. `?col=not.eq=foo` - @diogob
+- Call stored procedures
+- Filter NOT IN values, e.g. `?col=notin.1,2,3` - @rall
+- CSV responses to GET requests with `Accept: text/csv` - @diogob
+- Debian init scripts - @mkhon
+- Allow filters by computed columns - @diogob
+
+### Fixed
+- Reset user role on error
+- Compatible with Stack
+- Add materialized views to results in GET / - @diogob
+- Indicate insertable=true for views that are insertable through triggers - @diogob
+- Builds under GHC 7.10
+- Allow the use of columns named "count" in relations queried - @diogob
+
+## [0.2.10.0] - 2015-06-03
+### Added
+- Full text search, eg `/foo?text_vector=@@.bar`
+- Include auth id as well as db role to views (for row-level security)
+
+## [0.2.9.1] - 2015-05-20
+### Fixed
+- Put -Werror behind a cabal flag (for CI) so Hackage accepts package
+
+## [0.2.9.0] - 2015-05-20
+### Added
+- Return range headers in PATCH
+- Return PATCHed resources if header "Prefer: return=representation"
+- Allow nested objects and arrays in JSON post for jsonb columns
+- JSON Web Tokens - [Federico Rampazzo](https://github.com/framp)
+- Expose PostgREST as a Haskell package
+
+### Fixed
+- Return 404 if no records updated by PATCH
+
+## [0.2.8.0] - 2015-04-17
+### Added
+- Option to specify nulls first or last, eg `/people?order=age.desc.nullsfirst`
+- Filter nulls, `?col=is.null` and `?col=isnot.null`
+- Filter within jsonb, `?col->a->>b=eq.c`
+- Accept CSV in post body for bulk inserts
+
+### Fixed
+- Allow NULL values in posts
+- Show full command line usage on param errors
+
+## [0.2.7.0] - 2015-03-03
+### Added
+- Server response logging
+- Filter IN values, e.g. `?col=in.1,2,3`
+- Return POSTed resource if header "Prefer: return=representation"
+- Allow override of default (v1) schema
+
+## [0.2.6.0] - 2015-02-18
+### Added
+- A changelog
+- Filter by substring match, e.g. `?col=like.*hello*` (or ilike for
+  case insensitivity).
+- Access-Control-Expose-Headers for CORS
+
+### Fixed
+- Make filter position match docs, e.g. `?order=col.asc` rather
+  than `?order=asc.col`.

CONTRIBUTING.md

@@ -0,0 +1,55 @@
+# Contributing to PostgREST
+
+**First:** if you're unsure or afraid of _anything_, just ask or
+submit the issue or pull request anyways. You won't be yelled at
+for giving your best effort. The worst that can happen is that
+you'll be politely asked to change something. We appreciate any
+sort of contributions, and don't want a wall of rules to get in the
+way of that.
+
+However, for those individuals who want a bit more guidance on the
+best way to contribute to the project, read on. This document will
+cover what we're looking for. By addressing all the points we're
+looking for, it raises the chances we can quickly merge or address
+your contributions.
+
+## Issues
+
+### Reporting an Issue
+
+* Make sure you test against the latest released version. It is possible
+  we already fixed the bug you're experiencing.
+
+* Also check the `CHANGELOG.md` to see if any unreleased changes affect
+  the issue. The very newest changes can take a little while to be released
+  as a new official version.
+
+* Provide steps to reproduce the issue, including your OS version and
+  the specific database schema that you are using.
+
+## Code
+
+### Haskell Conventions
+
+* All contributions must pass the tests before being merged. When
+  you create a pull request your code will automatically be tested.
+
+* All code must also pass [hlint](http://community.haskell.org/~ndm/hlint/)
+  with no warnings. This helps enforce a uniform style for all
+  committers. Continuous integration will check this as well on every
+  pull request.
+
+* For help building the Haskell code on your computer check out the [building from
+source](https://github.com/begriffs/postgrest/wiki/Building-from-source)
+wiki page.
+
+## Maintenance
+
+### Schedule
+
+Currently I (@begriffs) am the sole maintainer, and while I am
+overjoyed to help resolve issues I also have to balance this with
+my other obligations.  If you don't get a response right away
+don't worry, I will definitely get to it. Also you can join the
+Gitter [chat room](https://gitter.im/begriffs/postgrest) to
+discuss issues you are having.

README.md

@@ -1,56 +1,177 @@
-## Serve a RESTful API from any Postgres database
+![Logo](static/logo.png "Logo")
 
-[![Build Status](https://circleci.com/gh/begriffs/postgrest.png?circle-token=f723c01686abf0364de1e2eaae5aff1f68bd3ff2)](https://circleci.com/gh/begriffs/postgrest/tree/master)
+[![Build Status](https://circleci.com/gh/begriffs/postgrest.png?style=shield&circle-token=f723c01686abf0364de1e2eaae5aff1f68bd3ff2)](https://circleci.com/gh/begriffs/postgrest/tree/master)
+<a href="https://heroku.com/deploy?template=https://github.com/begriffs/postgrest">
+  <img src="https://img.shields.io/badge/%E2%86%91_Deploy_to-Heroku-7056bf.svg" alt="Deploy">
+</a>
+[![Join the chat at https://gitter.im/begriffs/postgrest](https://img.shields.io/badge/gitter-join%20chat%20%E2%86%92-brightgreen.svg)](https://gitter.im/begriffs/postgrest)
 
-### Installation
+PostgREST serves a fully RESTful API from any existing PostgreSQL
+database. It provides a cleaner, more standards-compliant, faster
+API than you are likely to write from scratch.
 
-```sh
-brew install postgres
-cabal install -j --enable-tests
+### Demo [postgrest.herokuapp.com](https://postgrest.herokuapp.com) | Watch [Video](http://begriffs.com/posts/2014-12-30-intro-to-postgrest.html) | [GUI Demo](http://marmelab.com/ng-admin-postgrest)
+
+Try making requests to the live demo server with an HTTP client
+such as [postman](http://www.getpostman.com/). The structure of the
+demo database is defined by
+[begriffs/postgrest-example](https://github.com/begriffs/postgrest-example).
+You can use it as inspiration for test-driven server migrations in
+your own projects.
+
+### Usage
+
+Download the binary ([latest release](https://github.com/begriffs/postgrest/releases/latest)) and invoke like so:
+
+```bash
+postgrest  --db-host localhost  --db-port 5432     \
+           --db-name my_db      --db-user postgres \
+           --db-pass foobar     --db-pool 200      \
+           --anonymous postgres --port 3000        \
+           --v1schema public
 ```
 
-Example usage:
+In production include the `--secure` option which redirects all
+requests to HTTPS. Note that PostgREST does not handle the SSL
+internally and must be put behind another server that does (such
+as nginx or the Heroku load balancer).
 
-```sh
-cabal run -d [database] -U [auth-role] -a [anonymous-role]
-```
+### Performance
 
-This will connect to a postgres DB at the url
-`postgres://[auth-role]:@localhost:5432/[database]`.
+TLDR; subsecond response times for up to 2000 requests/sec on Heroku free tier. ([see the load test](https://github.com/begriffs/postgrest/wiki/Performance-and-Scaling))
 
-You will need to provide two database roles (which are allowed to
-be the same). One is called the authenticator role (`auth-role`
-above) which should have enough privileges to read the `auth` table
-in the `postgrest` schema if you intend to support multi-user
-applications.
+If you're used to servers written in interpreted languages (or named
+after precious gems), prepare to be pleasantly surprised by PostgREST
+performance.
 
-The other role is for anonymous access (`anonymous-role` above).
-Immediately upon acceping any unauthenticated HTTP connection postgrest
-assumes this role in its queries to postgres. Give this role as
-much or little permissions as you would like.
+Three factors contribute to the speed. First the server is written
+in [Haskell](https://new-www.haskell.org/) using the
+[Warp](http://www.yesodweb.com/blog/2011/03/preliminary-warp-cross-language-benchmarks)
+HTTP server (aka a compiled language with lightweight threads).
+Next it delegates as much calculation as possible to the database
+including
 
-### Running tests
+* Serializing JSON responses directly in SQL
+* Data validation
+* Authorization
+* Combined row counting and retrieval
+* Data post in single command (`returning *`)
 
-```sh
-createuser --superuser --no-password postgrest_test
-createdb -O postgrest_test -U postgres postgrest_test
+Finally it uses the database efficiently with the
+[Hasql](https://nikita-volkov.github.io/hasql-benchmarks/) library
+by
 
-cabal test --show-details=always --test-options="--color"
-```
+* Reusing prepared statements
+* Keeping a pool of db connections
+* Using the Postgres binary protocol
+* Being stateless to allow horizontal scaling
 
-### Distributing Heroku build
+Ultimately the server (when load balanced) is constrained by database
+performance. This may make it inappropriate for very large traffic
+load. To learn more about scaling with Heroku and Amazon RDS see
+the [performance guide](https://github.com/begriffs/postgrest/wiki/Performance-and-Scaling).
 
-```sh
-heroku create --stack=cedar --buildpack https://github.com/begriffs/heroku-buildpack-ghc.git
-git push heroku master
+Other optimizations are possible, and some are outlined in the
+[Future Features](#future-features).
 
-heroku config:set S3_ACCESS_KEY=abc
-heroku config:set S3_SECRET_KEY=123
-heroku config:set S3_BUCKET=s3://foo/bar
+### Security
 
-heroku run scripts/release_s3.sh
-```
+PostgREST handles authentication (HTTP Basic over SSL or [JSON Web
+Tokens](https://github.com/begriffs/postgrest/wiki/Security-and-Permissions#json-web-tokens))
+and delegates authorization to the role information defined in the
+database. This ensures there is a single declarative source of truth
+for security.  When dealing with the database the server assumes
+the identity of the currently authenticated user, and for the
+duration of the connection cannot do anything the user themselves
+couldn't.
 
-### Acknowledgements
+Postgres 9.5 will soon support true [row-level
+security](http://michael.otacoo.com/postgresql-2/postgres-9-5-feature-highlight-row-level-security/).
+In the meantime what isn't yet implemented can be simulated with
+triggers and security-barrier views. Because the possible queries
+to the database are limited to certain templates using
+[leakproof](http://blog.2ndquadrant.com/how-do-postgresql-security_barrier-views-work/)
+functions, the trigger workaround does not compromise row-level
+security.
 
-Thanks to [Adam Baker](https://github.com/adambaker) for code contributions and many fundamental design discussions. Also thanks to [Loop/Recur](https://looprecur.com) for open-source Fridays to advance the code, and for their courage to use this thing in real projects.
+For example security patterns see the [security
+guide](https://github.com/begriffs/postgrest/wiki/Security-and-Permissions).
+
+### Versioning
+
+A robust long-lived API needs the freedom to exist in multiple
+versions. PostgREST supports versioning through HTTP content
+negotiation. Requests for a certain version translate into switching
+which database schema to search for tables. PostgreSQL schema search
+paths allow tables from earlier versions to be reused verbatim in
+later versions.
+
+To learn more, see the [guide to versioning](https://github.com/begriffs/postgrest/wiki/API-Versioning).
+
+### Self-documention
+
+Rather than writing and maintaining separate docs yourself let the
+API explain its own affordances using HTTP. All PostgREST endpoints
+respond to the OPTIONS verb and explain what they support as well
+as the data format of their JSON payload.
+
+The number of rows returned by an endpoint is reported by - and
+limited with - range headers. More about
+[that](http://begriffs.com/posts/2014-03-06-beyond-http-header-links.html).
+
+There are more opportunities for self-documentation listed in [Future
+Features](#future-features).
+
+### Data Integrity
+
+Rather than relying on an Object Relational Mapper and custom
+imperative coding, this system requires you put declarative constraints
+directly into your database. Hence no application can corrupt your
+data (including your API server).
+
+The PostgREST exposes HTTP interface with safeguards to prevent
+surprises, such as enforcing idempotent PUT requests, and
+
+See examples of [Postgres
+constraints](http://www.tutorialspoint.com/postgresql/postgresql_constraints.htm)
+and the [guide to routing](https://github.com/begriffs/postgrest/wiki/Routing).
+
+### Future Features
+
+* Watching endpoint changes with sockets and Postgres pubsub
+* Specifying per-view HTTP caching
+* Inferring good default caching policies from the Postgres stats collector
+* Generating mock data for test clients
+* Maintaining separate connection pools per role to avoid "set/reset
+  role" performance penalty
+* Describe more relationships with Link headers
+* Depending on accept headers, render OPTIONS as [RAML](http://raml.org/) or a
+  relational diagram
+* Add two-legged auth with OAuth 1.0a(?)
+* ... the other [issues](https://github.com/begriffs/postgrest/issues)
+
+### Guides
+
+* [Routing](https://github.com/begriffs/postgrest/wiki/Routing)
+* [Versioning](https://github.com/begriffs/postgrest/wiki/API-Versioning)
+* [Performance](https://github.com/begriffs/postgrest/wiki/Performance-and-Scaling)
+* [Security](https://github.com/begriffs/postgrest/wiki/Security-and-Permissions)
+* [Tutorial](http://blog.jonharrington.org/postgrest-introduction/) (external)
+* [Heroku](https://github.com/begriffs/postgrest/wiki/Heroku)
+
+### Thanks
+
+* [Ruslan Talpa](https://github.com/ruslantalpa) for rewriting the
+  route parsing and query generation code to support resource embedding
+* [Adam Baker](https://github.com/adambaker) for code
+  contributions and many fundamental design discussions
+* [Diogo Biazus](https://github.com/diogob) for many improvements
+  and deep postgresql knowledge
+* [Nikita Volkov](https://github.com/nikita-volkov) for writing the
+  wonderful [Hasql](https://github.com/nikita-volkov/hasql) library
+  and helping me use it
+* [Mikey Casalaina](https://github.com/casalaina) for the cool logo
+* [Jonathan Harrington](https://github.com/prio) for writing a [nice
+  tutorial](http://blog.jonharrington.org/postgrest-introduction/)
+* [Federico Rampazzo](https://github.com/framp) for suggesting and
+  implementing [JWT](http://jwt.io/) support

app.json

@@ -0,0 +1,56 @@
+{
+  "name": "PostgREST",
+  "description": "RESTful API for any PostgreSQL database.",
+  "logo": "https://halcyon.sh/logo.svg",
+  "repository": "https://github.com/begriffs/postgrest",
+  "env": {
+    "BUILDPACK_URL": {
+      "description": "Heroku buildpack for deploying Haskell applications",
+      "value": "https://github.com/begriffs/postgrest-heroku"
+    },
+    "POSTGREST_VER": {
+      "description": "Version of PostgREST to deploy",
+      "value": "0.2.12.0"
+    },
+    "DB_NAME": {
+      "description": "Database name",
+      "required": true
+    },
+    "AUTH_ROLE": {
+      "description": "Database role to use checking client authentication",
+      "required": true
+    },
+    "AUTH_PASS": {
+      "description": "Authentication password",
+      "required": false
+    },
+    "ANONYMOUS_ROLE": {
+      "description": "Database role for non-authenticated requests",
+      "required": true
+    },
+    "DB_HOST": {
+      "description": "Database server hostname",
+      "required": true
+    },
+    "DB_PORT": {
+      "description": "Database server port",
+      "required": false,
+      "value": "5432"
+    },
+    "DB_POOL": {
+      "description": "Maximum number of connections in database pool",
+      "required": false,
+      "value": "10"
+    },
+    "JWT_SECRET": {
+      "description": "Secret used to encrypt JSON Web Tokens",
+      "required": false,
+      "value": "secret"
+    },
+    "V1SCHEMA": {
+      "description": "DB schema selected whe no version (or version 1) requested",
+      "required": false,
+      "value": "1"
+    }
+  }
+}

circle.yml

@@ -4,3 +4,13 @@ machine:
     - createdb -O postgrest_test -U ubuntu postgrest_test
   ghc:
     version: 7.8.3
+dependencies:
+  override:
+    - cabal update
+    - cabal sandbox init
+    - cabal install --upgrade-dependencies --constraint="template-haskell installed" --dependencies-only --enable-tests
+    - cabal configure --enable-tests -f ci
+test:
+  post:
+    - cabal exec hlint -- -X QuasiQuotes src/**/*.hs test/**/*.hs
+    - cabal exec packdeps postgrest.cabal

debian/TODO-deps.md

@@ -0,0 +1,52 @@
+# TODO list to build debian "official" package
+
+  It feels for free to modify, fix or take some task or all. 
+  
+## debian/control
+
+* Fill description field
+* Add Vcs-Browser
+* Add Vcs-Git
+* Add Uploaders field
+
+## debian/copyright 
+
+* Add more contributers 
+
+## Dependencies packages
+
+Some libraries dependencies aren't Debian package. Below is the list was built by [cabal-debian](https://wiki.debian.org/Haskell/CollabMaint/GettingStarted). These libraries are necessary to build Postgrest the right way. 
+
+* libghc-base64-string-dev
+* libghc-base64-string-prof
+* libghc-bcrypt-dev
+* libghc-bcrypt-prof
+* libghc-hasql-dev
+* libghc-hasql-prof
+* libghc-hasql-backend-dev
+* libghc-hasql-backend-prof
+* libghc-hasql-postgres-dev
+* libghc-hasql-postgres-prof
+* libghc-string-conversions-dev
+* libghc-string-conversions-prof
+* libghc-wai-cors-dev
+* libghc-wai-cors-prof
+* libghc-wai-middleware-static-dev
+* libghc-wai-middleware-static-prof
+* libghc-hasql-dev
+* libghc-hasql-backend-dev
+* libghc-hasql-postgres-dev
+* libghc-heredoc-dev
+* libghc-hspec-wai-dev
+* libghc-hspec-wai-json-dev
+* libghc-http-media-dev
+* libghc-packdeps-dev
+* libghc-base64-string-doc
+* libghc-bcrypt-doc
+* libghc-hasql-doc
+* libghc-hasql-backend-doc
+* libghc-hasql-postgres-doc
+* libghc-string-conversions-doc
+* libghc-wai-cors-doc
+* libghc-wai-middleware-static-doc
+

debian/changelog

@@ -0,0 +1,5 @@
+haskell-postgrest (0.2.11.1-1) UNRELEASED; urgency=low
+
+  * Initial release
+
+ -- Debian Haskell Group <pkg-haskell-maintainers@lists.alioth.debian.org>  Wed, 30 Sep 2015 18:52:46 +0000

debian/compat

@@ -0,0 +1 @@
+9

debian/control

@@ -0,0 +1,196 @@
+Source: haskell-postgrest
+Maintainer: Debian Haskell Group <pkg-haskell-maintainers@lists.alioth.debian.org>
+Priority: extra
+Section: haskell
+Build-Depends: debhelper (>= 9),
+ haskell-devscripts (>= 0.8),
+ cdbs,
+ ghc,
+ ghc-prof,
+ libghc-http-dev,
+ libghc-http-prof,
+ libghc-missingh-dev,
+ libghc-missingh-prof,
+ libghc-ranged-sets-dev,
+ libghc-ranged-sets-prof,
+ libghc-aeson-dev,
+ libghc-aeson-prof,
+ libghc-base64-string-dev,
+ libghc-base64-string-prof,
+ libghc-bcrypt-dev,
+ libghc-bcrypt-prof,
+ libghc-blaze-builder-dev,
+ libghc-blaze-builder-prof,
+ libghc-case-insensitive-dev,
+ libghc-case-insensitive-prof,
+ libghc-cassava-dev,
+ libghc-cassava-prof,
+ libghc-convertible-dev,
+ libghc-convertible-prof,
+ libghc-hasql-dev,
+ libghc-hasql-prof,
+ libghc-hasql-backend-dev,
+ libghc-hasql-backend-prof,
+ libghc-hasql-postgres-dev,
+ libghc-hasql-postgres-prof,
+ libghc-http-types-dev,
+ libghc-http-types-prof,
+ libghc-jwt-dev,
+ libghc-jwt-prof,
+ libghc-mtl-dev,
+ libghc-mtl-prof,
+ libghc-network-dev,
+ libghc-network-prof,
+ libghc-network-uri-dev,
+ libghc-network-uri-prof,
+ libghc-optparse-applicative-dev,
+ libghc-optparse-applicative-prof,
+ libghc-regex-base-dev,
+ libghc-regex-base-prof,
+ libghc-regex-tdfa-dev,
+ libghc-regex-tdfa-prof,
+ libghc-resource-pool-dev,
+ libghc-resource-pool-prof,
+ libghc-scientific-dev,
+ libghc-scientific-prof,
+ libghc-split-dev,
+ libghc-split-prof,
+ libghc-string-conversions-dev,
+ libghc-string-conversions-prof,
+ libghc-stringsearch-dev,
+ libghc-stringsearch-prof,
+ libghc-text-dev,
+ libghc-text-prof,
+ libghc-unordered-containers-dev,
+ libghc-unordered-containers-prof,
+ libghc-vector-dev,
+ libghc-vector-prof,
+ libghc-wai-dev,
+ libghc-wai-prof,
+ libghc-wai-cors-dev,
+ libghc-wai-cors-prof,
+ libghc-wai-extra-dev,
+ libghc-wai-extra-prof,
+ libghc-wai-middleware-static-dev,
+ libghc-wai-middleware-static-prof,
+ libghc-warp-dev,
+ libghc-warp-prof,
+ libghc-aeson-dev (>= 0.8),
+ libghc-bcrypt-dev (>= 0.0.6),
+ libghc-hasql-dev (>= 0.7.3),
+ libghc-hasql-dev (<< 0.8),
+ libghc-hasql-backend-dev (>= 0.4.1),
+ libghc-hasql-backend-dev (<< 0.5),
+ libghc-hasql-postgres-dev (>= 0.10.4),
+ libghc-hasql-postgres-dev (<< 0.11),
+ libghc-network-dev (>= 2.6),
+ libghc-network-uri-dev (>= 2.6),
+ libghc-optparse-applicative-dev (>= 0.11),
+ libghc-optparse-applicative-dev (<< 0.12),
+ libghc-wai-dev (>= 3.0.1),
+ libghc-wai-middleware-static-dev (>= 0.6.0),
+ libghc-warp-dev (>= 3.0.2),
+ libghc-quickcheck2-dev,
+ libghc-heredoc-dev,
+ libghc-hlint-dev,
+ libghc-hspec-dev (>= 2.1),
+ libghc-hspec-dev (<< 2.2),
+ libghc-hspec-wai-dev,
+ libghc-hspec-wai-json-dev,
+ libghc-http-media-dev,
+ libghc-packdeps-dev,
+Build-Depends-Indep: ghc-doc,
+ libghc-http-doc,
+ libghc-missingh-doc,
+ libghc-ranged-sets-doc,
+ libghc-aeson-doc,
+ libghc-base64-string-doc,
+ libghc-bcrypt-doc,
+ libghc-blaze-builder-doc,
+ libghc-case-insensitive-doc,
+ libghc-cassava-doc,
+ libghc-convertible-doc,
+ libghc-hasql-doc,
+ libghc-hasql-backend-doc,
+ libghc-hasql-postgres-doc,
+ libghc-http-types-doc,
+ libghc-jwt-doc,
+ libghc-mtl-doc,
+ libghc-network-doc,
+ libghc-network-uri-doc,
+ libghc-optparse-applicative-doc,
+ libghc-regex-base-doc,
+ libghc-regex-tdfa-doc,
+ libghc-resource-pool-doc,
+ libghc-scientific-doc,
+ libghc-split-doc,
+ libghc-string-conversions-doc,
+ libghc-stringsearch-doc,
+ libghc-text-doc,
+ libghc-unordered-containers-doc,
+ libghc-vector-doc,
+ libghc-wai-doc,
+ libghc-wai-cors-doc,
+ libghc-wai-extra-doc,
+ libghc-wai-middleware-static-doc,
+ libghc-warp-doc,
+Standards-Version: 3.9.6
+Homepage: https://github.com/begriffs/postgrest
+Description: REST API for any Postgres database
+ Reads the schema of a PostgreSQL database and creates RESTful routes
+ for the tables and views, supporting all HTTP verbs that security
+ permits.
+
+Package: libghc-postgrest-dev
+Architecture: any
+Depends: ${haskell:Depends},
+ ${misc:Depends},
+ ${shlibs:Depends},
+Recommends: ${haskell:Recommends},
+Suggests: ${haskell:Suggests},
+Conflicts: ${haskell:Conflicts},
+Provides: ${haskell:Provides},
+Description: ${haskell:ShortDescription}${haskell:ShortBlurb}
+ ${haskell:LongDescription}
+ .
+ ${haskell:Blurb}
+
+Package: libghc-postgrest-prof
+Architecture: any
+Depends: ${haskell:Depends},
+ ${misc:Depends},
+Recommends: ${haskell:Recommends},
+Suggests: ${haskell:Suggests},
+Conflicts: ${haskell:Conflicts},
+Provides: ${haskell:Provides},
+Description: ${haskell:ShortDescription}${haskell:ShortBlurb}
+ ${haskell:LongDescription}
+ .
+ ${haskell:Blurb}
+
+Package: libghc-postgrest-doc
+Architecture: all
+Section: doc
+Depends: ${haskell:Depends},
+ ${misc:Depends},
+Recommends: ${haskell:Recommends},
+Suggests: ${haskell:Suggests},
+Conflicts: ${haskell:Conflicts},
+Description: ${haskell:ShortDescription}${haskell:ShortBlurb}
+ ${haskell:LongDescription}
+ .
+ ${haskell:Blurb}
+
+Package: haskell-postgrest-utils
+Architecture: any
+Section: misc
+Depends: ${haskell:Depends},
+ ${misc:Depends},
+Recommends: ${haskell:Recommends},
+Suggests: ${haskell:Suggests},
+Conflicts: ${haskell:Conflicts},
+Provides: ${haskell:Provides},
+Description: ${haskell:ShortDescription}${haskell:ShortBlurb}
+ ${haskell:LongDescription}
+ .
+ ${haskell:Blurb}

debian/copyright

@@ -0,0 +1,32 @@
+Format: http://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
+Upstream-Name: postgrest
+Upstream-Contact: Joe Nelson <joe@begriffs.com>
+Source: https://hackage.haskell.org/package/postgrest
+
+Files: *
+Copyright: 2014-2015 Joe Nelson <joe@begriffs.com>
+License: Expat
+
+Files: debian/*
+Copyright: 2015 Fernando Ike <fike@midstorm.org>
+License: Expat
+
+License: Expat
+ Permission is hereby granted, free of charge, to any person obtaining
+ a copy of this software and associated documentation files (the
+ "Software"), to deal in the Software without restriction, including
+ without limitation the rights to use, copy, modify, merge, publish,
+ distribute, sublicense, and/or sell copies of the Software, and to
+ permit persons to whom the Software is furnished to do so, subject to
+ the following conditions:
+ .
+ The above copyright notice and this permission notice shall be included
+ in all copies or substantial portions of the Software.
+ .
+ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+ CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

debian/haskell-postgrest-utils.install

@@ -0,0 +1 @@
+dist-ghc/build/postgrest/postgrest usr/bin

debian/postgrest-wrapper

@@ -0,0 +1,8 @@
+#!/bin/sh
+d=$(dirname $0)
+if [ -f /etc/default/postgrest ]; then
+	. /etc/default/postgrest
+fi
+POSTGREST_LOG=${POSTGREST_LOG:-/var/log/postgrest/postgrest.log}
+
+exec $d/postgrest "$@" >>$POSTGREST_LOG 2>&1 &

debian/postgrest.default

@@ -0,0 +1,23 @@
+# run service as
+#POSTGREST_USER=postgrest
+
+# log file
+#POSTGREST_LOG=/var/log/postgrest/postgrest.log
+
+# database host
+#POSTGREST_DBHOST=localhost
+
+# database to use
+#POSTGREST_DBNAME=
+
+# database user
+#POSTGREST_DBUSER=postgres
+
+# database password
+#POSTGREST_DBPASS=
+
+# database pool
+#POSTGREST_DBPOOL=10
+
+# additional options
+#POSTGREST_OPTS=

debian/postgrest.init.d

@@ -0,0 +1,78 @@
+#!/bin/sh
+### BEGIN INIT INFO
+# Provides:          postgrest
+# Required-Start:    $local_fs $network postgresql
+# Required-Stop:     $local_fs $network 
+# Default-Start:     2 3 4 5
+# Default-Stop:      0 1 6
+# Description:       PostgreSQL REST API daemon
+### END INIT INFO
+ 
+. /lib/lsb/init-functions
+if test -f /etc/default/postgrest; then
+    . /etc/default/postgrest
+fi
+POSTGREST=/usr/local/bin/postgrest
+POSTGREST_USER=${POSTGREST_USER:-postgrest}
+POSTGREST_DBNAME=${POSTGREST_DBNAME:-postgres}
+POSTGREST_DBUSER=${POSTGREST_DBUSER:-postgres}
+if [ -n "$POSTGREST_DBHOST" ]; then
+	POSTGREST_OPTS="$POSTGREST_OPTS --db-host $POSTGREST_DBHOST"
+fi
+if [ -n "$POSTGREST_DBNAME" ]; then
+	POSTGREST_OPTS="$POSTGREST_OPTS --db-name $POSTGREST_DBNAME"
+fi
+if [ -n "$POSTGREST_DBUSER" ]; then
+	POSTGREST_OPTS="$POSTGREST_OPTS --db-user $POSTGREST_DBUSER"
+	POSTGREST_OPTS="$POSTGREST_OPTS --anonymous $POSTGREST_DBUSER"
+fi
+if [ -n "$POSTGREST_DBPASS" ]; then
+	POSTGREST_OPTS="$POSTGREST_OPTS --db-pass $POSTGREST_DBPASS"
+fi
+if [ -n "$POSTGREST_DBPOOL" ]; then
+	POSTGREST_OPTS="$POSTGREST_OPTS --db-pool $POSTGREST_DBPOOL"
+fi
+POSTGREST_OPTS="$POSTGREST_OPTS --v1schema public"
+ 
+start()
+{
+	log_daemon_msg "Starting PostgreSQL REST API daemon" "postgrest" || true
+	if start-stop-daemon --start --quiet --oknodo --chuid ${POSTGREST_USER} --startas /usr/local/bin/postgrest-wrapper --exec $POSTGREST -- $POSTGREST_OPTS; then
+		log_end_msg 0 || true
+	else
+		log_end_msg 1 || true
+	fi
+}
+ 
+stop()
+{
+	log_daemon_msg "Stopping PostgreSQL REST API daemon" "postgrest" || true
+	if start-stop-daemon --stop --quiet --oknodo --exec $POSTGREST; then
+		log_end_msg 0 || true
+	else
+		log_end_msg 1 || true
+	fi
+}
+ 
+status()
+{
+	status_of_proc $POSTGREST postgrest && exit 0 || exit $?
+}
+
+case "$1" in
+start)
+	start
+	;;
+stop)
+	stop
+	;;
+restart)
+	stop
+	start
+	;;
+status)
+	status
+	;;
+*)
+	echo "Usage: $0 {start|stop|restart|status}"
+esac

debian/rules

@@ -0,0 +1,10 @@
+#!/usr/bin/make -f
+
+DEB_ENABLE_TESTS = yes
+DEB_CABAL_PACKAGE = postgrest
+DEB_DEFAULT_COMPILER = ghc
+
+include /usr/share/cdbs/1/rules/debhelper.mk
+include /usr/share/cdbs/1/class/hlibrary.mk
+
+build/haskell-postgrest-utils:: build-ghc-stamp

debian/source/format

@@ -0,0 +1 @@
+3.0 (quilt)

debian/watch

@@ -0,0 +1,2 @@
+version=3
+http://hackage.haskell.org/package/postgrest/distro-monitor .*-([0-9\.]+)\.(?:zip|tgz|tbz|txz|(?:tar\.(?:gz|bz2|xz)))

docs/CNAME

@@ -0,0 +1 @@
+postgrest.com

docs/admin/deployment.md

@@ -0,0 +1,9 @@
+## Deployment
+
+### Heroku
+
+#### Getting Started
+
+#### Using Amazon RDS
+
+### Debian

docs/admin/migration.md

@@ -0,0 +1,9 @@
+## Data Migration
+
+### Sqitch
+
+### Test-Driven Migrations
+
+#### Structural Tests
+
+#### Value Tests with pgTAP

docs/admin/performance.md

@@ -0,0 +1,9 @@
+## Performance
+
+### Benchmarks
+
+### Caching
+
+### Quality of Service
+
+### Tips

docs/admin/security.md

@@ -0,0 +1,21 @@
+## Security
+
+### SSL
+
+### Database Roles
+
+### JSON Web Tokens
+
+#### Issuing via sql procedures
+
+### Row-Level Security
+
+#### Simulated - PostgreSQL <9.5
+
+#### Real - PostgreSQL >=9.5
+
+### Building Auth on top of JWT
+
+#### Basic Auth
+
+#### Github Sign-in

docs/admin/versioning.md

@@ -0,0 +1,9 @@
+## API Versioning
+
+### Schema Search Path
+
+### Changing a Resource
+
+### Removing a Resource
+
+### Avoiding DB and Client Coupling

docs/api/reading.md

@@ -0,0 +1,296 @@
+## Requesting Information
+
+### Tables and Views
+
+* ✅ Cacheable, prefetchable
+* ✅ Idempotent
+
+The list of accessible tables and views is provided at
+
+```HTTP
+GET /
+```
+
+Every view and table accessible by the active db role is exposed
+in a one-level deep route. For instance the full contents of a table
+`people` is returned at
+
+```HTTP
+GET /people
+```
+
+There are no `deeply/nested/routes`. Each route provides `OPTIONS`,
+`GET`, `POST`, `PUT`, `PATCH`, and `DELETE` verbs depending entirely
+on database permissions.
+
+<div class="admonition note">
+  <p class="admonition-title">Design Consideration</p>
+
+  <p>Why not provide nested routes? Many APIs allow nesting to
+  retrieve related information, such as <code>/films/1/director</code>.
+  We offer a more flexible mechanism instead to embed related
+  information, including many-to-many relationships. This is covered
+  in the section about Embedding.</p>
+</div>
+
+### Stored Procedures
+
+* ❌ Cannot necessarily be cached or prefetched
+* ❌ Not necessarily idempotent
+
+Every stored procedure is accessible under the `/rpc` prefix. The
+API endpoint supports only POST which executes the function.
+
+```HTTP
+POST /rpc/proc_name
+```
+
+PostgREST supports calling procedures with [named
+arguments](http://www.postgresql.org/docs/9.4/static/sql-syntax-calling-funcs.html#SQL-SYNTAX-CALLING-FUNCS-NAMED).
+To do so include a JSON object in the request payload and each
+key/value of the object will become an argument.
+
+<div class="admonition note">
+  <p class="admonition-title">Design Consideration</p>
+
+  <p>Why the /rpc prefix? One reason is to avoid name collisions
+  between views and procedures. It also helps emphasize to API
+  consumers that these functions are not normal restful things.
+  The functions can have arbitrary and surprising behavior, not
+  the standard "post creates a resource" thing that users expect
+  from the other routes.</p>
+
+  <p>We considered allowing GET requests for functions that are
+  marked non-volatile but could not reconcile how to pass in
+  parameters. Query string arguments are reserved for shaping/filtering
+  the output, not providing input.</p>
+</div>
+
+
+
+### Filtering
+
+#### Filtering Rows
+
+You can filter result rows by adding conditions on columns, each
+condition a query string parameter.  For instance, to return people
+aged under 13 years old:
+
+```HTTP
+GET /people?age=lt.13
+```
+
+Adding multiple parameters conjoins the conditions:
+
+```HTTP
+GET /people?age=gte.18&student=is.true
+```
+
+These operators are available:
+
+abbreviation | meaning
+------------ | -------
+eq           | equals
+gt           | greater than
+lt           | less than
+gte          | greater than or equal
+lte          | less than or equal
+like         | LIKE operator (use * in place of %)
+ilike        | ILIKE operator (use * in place of %)
+@@           | full-text search using to_tsquery
+is           | checking for exact equality (null,true,false)
+in           | one of a list of values e.g. `?a=in.1,2,3`
+not          | negates another operator, see below
+
+To negate any operator, prefix it with `not` like `?a=not.eq.2`.
+
+For more complicated filters (such as those involving condition 1
+*OR* condition 2) you will have to create a new view in the database.
+
+Filters may be applied to [computed
+columns](http://www.postgresql.org/docs/current/interactive/xfunc-sql.html#XFUNC-SQL-COMPOSITE-FUNCTIONS)
+as well as actual table/view columns, even though the computed
+columns will not appear in the output.
+
+#### Filtering Columns
+
+You can customize which columns are returned by using the `select`
+parameter:
+
+```HTTP
+GET /people?select=age,height,weight
+```
+
+To cast the column types, add a double colon
+
+```HTTP
+GET /people?select=age::text,height,weight
+```
+
+Not all type coercions are possible, and you will get an error
+describing any problems from selection or type casting.
+
+The `select` keyword is reserved. You thus cannot filter rows based
+on a column named select. Then again it is a reserved SQL keyword
+too, hence an unlikely column name.
+
+#### Inside JSONB
+
+PostgreSQL >=9.4.2 supports native JSON columns and can even index
+them by internal keys using the `jsonb` column type. PostgREST
+allows you to filter results by internal JSON object values. Use
+the single- and double-arrows to path into and obtain values, e.g.
+
+```HTTP
+GET /stuff?json_col->a->>b=eq.2
+```
+
+This query finds rows in `stuff` where `json_col->'a'->>'b'` is
+equal to 2 (or "2" -- it coerces as needed). The final arrow must
+be the double kind, `->>`, or else PostgREST will not attempt to
+look inside the JSON.
+
+### Ordering
+
+The reserved word `order` reorders the response rows.  It uses a
+comma-separated list of columns and directions:
+
+```HTTP
+GET /people?order=age.desc,height.asc
+```
+
+If no direction is specified it defaults to descending order:
+
+```HTTP
+GET /people?order=age
+```
+
+If you care where nulls are sorted, add `nullsfirst` or `nullslast`:
+
+```HTTP
+GET /people?order=age.nullsfirst
+```
+
+### Limiting and Pagination
+
+#### Pagination by Limit-Offset
+
+PostgREST uses HTTP range headers for limiting and describing the
+size of results. Every response contains the current range and total
+results:
+
+```
+Range-Unit: items
+Content-Range → 0-14/15
+```
+
+This means items zero through fourteen are returned out of a total
+of fifteen -- i.e. all of them. This information is available in
+every response and can help you render pagination controls on the
+client. This is a RFC7233-compliant solution that keeps the response
+JSON cleaner.
+
+The client can set the limit and offset of a request by setting the
+`Range` header. Translate the limit and offset into a range. To
+request the first five elements, include these request headers:
+
+```
+Range-Unit: items
+Range: 0-4
+```
+
+You can also use open-ended ranges for an offset with no limit:
+`Range: 10-`.
+
+#### Suppressing Counts
+
+Sometimes knowing the total row count of a query is unnecessary and
+only adds extra cost to the database query. So you can skip the
+count total using a ```Prefer``` header as:
+
+```
+Prefer: count=none
+```
+
+So the PostgREST response will be something like:
+
+```
+Range-Unit: items
+Content-Range → 0-14/*
+```
+
+### Embedding Foreign Entities
+
+Suppose you have a `projects` table which references `clients` through
+a foreign key called `client_id`. When listing projects through the
+API you can have it embed the client within each project response.
+For example,
+
+```HTTP
+GET /projects?id=eq.1&select=id, name, clients(*)
+```
+
+Notice this is the same `select` keyword which is used to choose
+which columns to include. When a column name is followed by parentheses
+that means to fetch the entire record and nest it. You include a
+list of columns inside the parens, or asterisk to request all
+columns.
+
+The embedding works for 1-N, N-1, and N-N relationships. That means
+you could also ask for a client and all their projects:
+
+```HTTP
+GET /clients?id=eq.42&select=id, name, projects(*)
+```
+
+### Response Format
+
+Query responses default to JSON but you can get them in CSV as well. Just make your request with the header
+
+```HTTP
+Accept: text/csv
+```
+
+### Singular vs Plural
+
+Many APIs distinguish plural and singular resources, e.g.`/stories`
+vs `/stories/1`. Why do we use `/stories?id=eq.1`? It is because a
+single resource is for us a row determined by a primary key, and
+primary keys can be *compound* (meaning defined across more than
+one column). The common urls come from a degenerate case of simple
+(and overwhelmingly numeric) primary keys often introduced automatically
+be Object Relational Mapping.
+
+For consistency's sake all these endpoints return a JSON array,
+`/stories`, `/stories?genre=eq.mystery`, `/stories?id=eq.1`. They
+are all filtering a bigger array. However you might want the
+last one to return a single JSON object, not an array with one
+element. There is currently an open issue to enable this.
+
+### Data Schema
+
+As well as issuing a `GET /` to obtain a list of the tables, views,
+and stored procedures available, you can get more information about
+any particular endpoint.
+
+```HTTP
+OPTIONS /my_view
+```
+
+This will include the row names, their types, primary key
+information, and foreign keys for the given table or view.
+
+<div class="admonition danger">
+    <p class="admonition-title">Deprecation Warning</p>
+
+    <p>Although we currently use the OPTIONS verb for this, some
+    people <a
+    href="https://www.mnot.net/blog/2012/10/29/NO_OPTIONS">argue</a> that
+    this is inappropriate. We are considering a <code>describedby</code>
+    header link instead.</p>
+</div>
+
+### CORS
+
+PostgREST sets highly permissive cross origin resource sharing.  It
+accepts Ajax requests from any domain.

docs/api/writing.md

@@ -0,0 +1,131 @@
+## Updating Data
+
+### Record Creation
+
+* ❌ Cannot be cached or prefetched
+* ❌ Not idempotent
+
+To create a row in a database table post a JSON object whose keys
+are the names of the columns you would like to create. Missing keys
+will be set to default values when applicable.
+
+```HTTP
+POST /table_name
+{ "col1": "value1", "col2": "value2" }
+```
+
+The response will include a `Location` header describing where to
+find the new object. If you would like to get the full object back
+in the response to your request, include the header `Prefer:
+return=representation`. That way you won't have to make another
+HTTP call to discover properties that may have been filled in on
+the server side.
+
+### Bulk Insertion
+
+* ❌ Cannot be cached or prefetched
+* ❌ Not idempotent
+
+While regular insertion uses JSON to encode the value, bulk insertion
+uses CSV. Simply post to a table route with `Content-Type: text/csv`
+and include the names of the columns as the first row. For instance
+
+```HTTP
+POST /people
+name,age,height
+J Doe,62,70
+Jonas,10,55
+```
+
+An empty field (`,,`) is coerced to an empty string and the reserved
+word `NULL` is mapped to the SQL null value. Note that there should
+be no spaces between the column names and commas.
+
+The server sends a multipart response for bulk insertions. Each part
+contains a Location header with URL of each created resource.
+
+```HTTP
+Content-Type: application/json
+Location: /festival?name=eq.Venice%20Film%20Festival
+
+
+--postgrest_boundary
+Content-Type: application/json
+Location: /festival?name=eq.Cannes%20Film%20Festival
+```
+
+### Upsertion
+
+* ❌ Cannot be cached or prefetched
+* ✅ Idempotent
+
+To insert or update a single row use the `PUT` verb on a properly
+filtered table url:
+
+```HTTP
+PUT /table_name?primary_key=eq.foo
+{ "col1": "value1", "col2": "value2" }
+```
+
+The request must satisfy two things. First all columns must be
+specified (because a default value might be a changing value which
+would violate idempotence). Second the URL must match the URL you
+would use to get the value of the resource. This means that all
+primary key columns must be included in the filter (there are more
+than one when the primary key is compound).
+
+If you would like to get the full object back in the response to
+your request, include the header `Prefer: return=representation`.
+It will of match exactly the object you sent though.
+
+### Bulk Updates
+
+* ❌ Cannot be cached or prefetched
+* ❌ Not idempotent
+
+To change parts of a resource or resources use the `PATCH` verb.
+For instance, here is how to mark all young people as children.
+
+```HTTP
+PATCH /people?age=lt.13
+{
+  "person_type": "child"
+}
+```
+
+This affects any rows matched by the url param filters, overwrites
+any fields specified in in the payload JSON and leaves the other
+fields unaffected. Note that although the payload is not in the
+JSON patch format specified by
+[RFC6902](https://tools.ietf.org/html/rfc6902), HTTP does not specify
+which patch format to use. Our format is more pleasant, meant for
+basic field replacements, and not at all "incorrect."
+
+### Deletion
+
+* ❌ Cannot be cached or prefetched
+* ✅ Idempotent
+
+Simply use the `DELETE` verb. All recors that match your filter
+will be removed. For instance deleting inactive users:
+
+```HTTP
+DELETE /user?active=eq.false
+```
+
+### Protecting Dangerous Actions
+
+Notice that it is very easy to delete or update many records at
+once. In fact forgetting a filter will affect an entire table!
+
+
+<div class="admonition warning">
+    <p class="admonition-title">Invitation to Contribute</p>
+
+    <p>We would like to investigate nginx rules to guard dangerous
+    actions, perhaps requiring a confirmation header or query param
+    to perform the action.</p>
+
+    <p>You're invited to research this option and contribute to
+    this documentation.</p>
+</div>

docs/examples/start.md

@@ -0,0 +1,346 @@
+## Getting Started
+
+### Your First (simple) API
+
+Let's start with the simplest thing possible. We will expose some tables directly for reading and writing by anyone.
+
+Start by making a database
+
+```sh
+createdb demo1
+```
+
+We'll set it up with a film example (courtesy of [Jonathan Harrington](http://blog.jonharrington.org/postgrest-introduction/)). Copy the following into your clipboard:
+
+```sql
+BEGIN;
+
+CREATE TABLE director
+(
+  name text NOT NULL PRIMARY KEY
+);
+
+CREATE TABLE film
+(
+  id serial PRIMARY KEY,
+  title text NOT NULL,
+  year date NOT NULL,
+  director text,
+  rating real NOT NULL DEFAULT 0,
+  language text NOT NULL,
+  CONSTRAINT film_director_fkey FOREIGN KEY (director)
+      REFERENCES director (name) MATCH SIMPLE
+      ON UPDATE CASCADE ON DELETE CASCADE
+);
+
+CREATE TABLE festival
+(
+  name text NOT NULL PRIMARY KEY
+);
+
+CREATE TABLE competition
+(
+  id serial PRIMARY KEY,
+  name text NOT NULL,
+  festival text NOT NULL,
+  year date NOT NULL,
+
+  CONSTRAINT comp_festival_fkey FOREIGN KEY (festival)
+      REFERENCES festival (name) MATCH SIMPLE
+      ON UPDATE CASCADE ON DELETE CASCADE
+);
+
+CREATE TABLE film_nomination
+(
+  id serial PRIMARY KEY,
+  competition integer NOT NULL,
+  film integer NOT NULL,
+  won boolean NOT NULL DEFAULT true,
+
+  CONSTRAINT nomination_competition_fkey FOREIGN KEY (competition)
+     REFERENCES competition (id) MATCH SIMPLE
+     ON UPDATE NO ACTION ON DELETE NO ACTION,
+  CONSTRAINT nomination_film_fkey FOREIGN KEY (film)
+     REFERENCES film (id) MATCH SIMPLE
+     ON UPDATE CASCADE ON DELETE CASCADE
+);
+
+COMMIT;
+```
+
+Apply it to your new database by running
+
+```sh
+# On OS X
+pbpaste | psql demo1
+
+# Or Linux
+# xclip -selection clipboard -o | psql demo1
+```
+
+Start the PostgREST server and point it at the new database.
+
+```sh
+postgrest -d demo1 -U postgres -a postgres --v1schema public
+```
+
+<div class="admonition note">
+    <p class="admonition-title">Note about database users</p>
+
+    <p>If you installed PostgreSQL with Homebrew on Mac then the
+    database username may be your own login rather than
+    <code>postgres</code>.</p>
+</div>
+
+Let's use PostgREST to populate the database. Install a REST client such as [Postman](https://chrome.google.com/webstore/detail/postman/fhbjgbiflinjbdggehcddcbncdddomop?hl=en). Now let's insert some data as a bulk post in CSV format:
+
+```HTTP
+POST http://localhost:3000/festival
+Content-Type: text/csv
+
+name
+Venice Film Festival
+Cannes Film Festival
+```
+
+In Postman it will look like this
+
+![Festival bulk insert in postman](/img/post-festivals.png)
+
+Notice that the post type is `raw` and that `Content-Type: text/csv` set in the Headers tab. 
+
+Note that the server returns a multipart response with URL of each created resource.
+
+```HTTP
+Content-Type: application/json
+Location: /festival?name=eq.Venice%20Film%20Festival
+
+
+--postgrest_boundary
+Content-Type: application/json
+Location: /festival?name=eq.Cannes%20Film%20Festival
+```
+
+If you send a GET request to `/festival` it should return
+
+```json
+[
+  {
+    "name": "Venice Film Festival"
+  },
+  {
+    "name": "Cannes Film Festival"
+  }
+]
+```
+
+Now that you've seen how to do a bulk insert, let's do some more and fully populate the database.
+
+Post the following to `/competition`:
+
+```csv
+name,festival,year
+Golden Lion,Venice Film Festival,2014-01-01
+Palme d'Or,Cannes Film Festival,2014-01-01
+```
+
+Now `/director`:
+
+```csv
+name
+Bertrand Bonello
+Atom Egoyan
+David Gordon Green
+Andrey Konchalovskiy
+Mario Martone
+Mike Leigh
+Roy Andersson
+Saverio Costanzo
+Alix Delaporte
+Jean-Pierre Dardenne
+Xiaoshuai Wang
+Kaan Müjdeci
+Tommy Lee Jones
+Nuri Bilge Ceylan
+Michel Hazanavicius
+Xavier Dolan
+Ramin Bahrani
+Alice Rohrwacher
+Andrew Niccol
+Rakhshan Bani-Etemad
+David Oelhoffen
+Bennett Miller
+David Cronenberg
+Shin'ya Tsukamoto
+Joshua Oppenheimer
+Olivier Assayas
+Jean-Luc Godard
+Alejandro González Iñárritu
+Benoît Jacquot
+Fatih Akin
+Francesco Munzi
+Ken Loach
+Abel Ferrara
+Xavier Beauvois
+Naomi Kawase
+```
+
+And `/film`:
+
+```csv
+title,year,director,rating,language
+Chuang ru zhe,2014-01-01,Xiaoshuai Wang,6.19999981,english
+The Look of Silence,2014-01-01,Joshua Oppenheimer,8.30000019,Indonesian
+Fires on the Plain,2014-01-01,Shin'ya Tsukamoto,5.80000019,Japanese
+Far from Men,2014-01-01,David Oelhoffen,7.5,english
+Good Kill,2014-01-01,Andrew Niccol,6.0999999,english
+Leopardi,2014-01-01,Mario Martone,6.9000001,english
+Sivas,2014-01-01,Kaan Müjdeci,7.69999981,english
+Black Souls,2014-01-01,Francesco Munzi,7.0999999,english
+Three Hearts,2014-01-01,Benoît Jacquot,5.80000019,French
+Pasolini,2014-01-01,Abel Ferrara,5.80000019,english
+Le dernier coup de marteau,2014-01-01,Alix Delaporte,6.5,english
+Manglehorn,2014-01-01,David Gordon Green,7.0999999,english
+Hungry Hearts,2014-01-01,Saverio Costanzo,6.4000001,English
+Belye nochi pochtalona Alekseya Tryapitsyna,2014-01-01,Andrey Konchalovskiy,6.9000001,Russian
+99 Homes,2014-01-01,Ramin Bahrani,7.30000019,english
+The Cut,2014-01-01,Fatih Akin,6,Armenian
+Birdman: Or (The Unexpected Virtue of Ignorance),2014-01-01,Alejandro González Iñárritu,8,English
+La rançon de la gloire,2014-01-01,Xavier Beauvois,5.69999981,French
+A Pigeon Sat on a Branch Reflecting on Existence,2014-01-01,Roy Andersson,7.19999981,english
+Tales,2014-01-01,Rakhshan Bani-Etemad,6.80000019,english
+The Wonders,2014-01-01,Alice Rohrwacher,6.80000019,Italian
+Foxcatcher,2014-01-01,Bennett Miller,7.19999981,English
+Mr. Turner,2014-01-01,Mike Leigh,7,English
+Jimmy's Hall,2014-01-01,Ken Loach,6.69999981,English
+The Homesman,2014-01-01,Tommy Lee Jones,6.5999999,English
+The Captive,2014-01-01,Atom Egoyan,5.9000001,english
+Goodbye to Language,2014-01-01,Jean-Luc Godard,6.19999981,French
+The Search,2014-01-01,Michel Hazanavicius,6.9000001,French
+Still the Water,2014-01-01,Naomi Kawase,6.9000001,Japanese
+Mommy,2014-01-01,Xavier Dolan,8.30000019,French
+"Two Days, One Night",2014-01-01,Jean-Pierre Dardenne,7.4000001,French
+Maps to the Stars,2014-01-01,David Cronenberg,6.4000001,English
+Saint Laurent,2014-01-01,Bertrand Bonello,6.5,French
+Clouds of Sils Maria,2014-01-01,Olivier Assayas,6.9000001,english
+Winter Sleep,2014-01-01,Nuri Bilge Ceylan,8.5,Turkish
+```
+
+Finally `/film_nomination`:
+
+```csv
+competition,film,won
+1,1,f
+1,2,f
+1,3,f
+1,4,f
+1,5,f
+1,6,f
+1,7,f
+1,8,f
+1,9,f
+1,10,f
+1,11,f
+1,12,f
+1,13,f
+1,14,f
+1,15,f
+1,16,f
+1,17,f
+1,18,f
+1,19,f
+1,20,f
+2,21,f
+2,22,f
+2,23,f
+2,24,f
+2,25,f
+2,26,f
+2,27,f
+2,28,f
+2,29,f
+2,30,f
+2,31,f
+2,32,f
+2,33,f
+2,34,f
+2,35,f
+```
+
+At this point nominations are fully specified but it's not a convenient interface for a rest client. Let's make a view they can use. Paste this into `psql demo1`.
+
+```sql
+create or replace view nomination as
+select comp.festival,  
+       comp.name as competition,
+       comp.year,
+       film.title,
+       film.director,
+       film.rating
+ from film_nomination as nom
+ left join film on nom.film = film.id
+ left join competition as comp on nom.competition = comp.id
+ order by comp.year desc, comp.festival, competition;
+```
+
+Time to try it out. Let's get the contents of the new view, ordered by film rating
+
+```
+GET http://localhost:3000/nomination?order=rating.desc
+```
+
+If you find it more human readable, add an `Accept: text/csv` header.
+
+### Releasing a New Version
+
+Suppose we want this endpoint to cater to those moviegoers with attention deficit disorder. In today's busy world we don't have time to read an extra couple words or compare nuanced reviews. In API version two we will truncate the names and round the ratings!
+
+Each version lives in a numbered schema, so let's make a schema for version two.
+
+```sql
+CREATE SCHEMA "2";
+GRANT USAGE ON SCHEMA "2" TO PUBLIC;
+ALTER DATABASE demo1 SET search_path = "2", "public";
+```
+
+To override the `films` endpoint create a view in the "2" schema with that name:
+
+```sql
+create or replace view "2".film as
+select id, substring(f.title from 1 for 10) as title,
+       year, director, round(f.rating) as rating, language
+from "public".film as f;
+```
+
+We select the desired version as part of content negotiation. Try this get request:
+
+```HTTP
+GET http://localhost:3000/film
+Accept: text/csv; version=2
+```
+
+Then try toggling the version string in the Accept header and watch the results change. Pretty good, now how about writing values? PostgreSQL's nice feature called auto-updatable views allows writes to pass through views. Sadly this view is not eligible because truncation and rounding cannot be uniquely reversed. If we attempt to post a new result it complains:
+
+```json
+{
+  "hint": null,
+  "details": "View columns that are not columns of their base relation are not updatable.",
+  "code": "0A000",
+  "message": "cannot insert into column \"title\" of view \"film\""
+}
+```
+
+This is a case where we need explicit triggers
+
+```sql
+-- TODO - FIX THIS
+
+-- CREATE OR REPLACE RULE insert_v2_films AS
+--   ON INSERT TO "2".film
+--   DO INSTEAD
+--      INSERT INTO public.film (id, title, year, director, rating, language)
+--      VALUES (NEW.id,     NEW.title,
+--              NEW.year,   NEW.director,
+--              NEW.rating, NEW.language)
+--      RETURNING public.film.*;
+```

docs/index.md

@@ -0,0 +1,68 @@
+![PostgREST logo](img/logo.png)
+
+## Introduction
+
+PostgREST is a standalone web server that turns your database directly into a RESTful API. The structural constraints and permissions in the database determine the API endpoints and operations.
+
+This guide explains how to install the software and provides practical examples of its use. You'll learn how to build a fast, versioned, secure API and how to deploy it to production.
+
+The project has a friendly and growing community. Here are some ways to get help or get involved:
+
+* The project [chat room](https://gitter.im/begriffs/postgrest)
+* Report or search [issues](https://github.com/begriffs/postgrest/issues)
+
+### Motivation
+
+Using PostgREST is an alternative to manual CRUD programming. Custom API servers suffer problems. Writing business logic often duplicates, ignores or hobbles database structure. Object-relational mapping is a leaky abstraction leading to slow imperative code. The PostgREST philosophy establishes a single declarative source of truth: the data itself.
+
+#### Declarative Programming
+
+It's easier to ask Postgres to join data for you and let its query planner figure out the details than to loop through rows yourself. It's easier to assign permissions to db objects than to add guards in controllers. (This is especially true for cascading permissions in data dependencies.) It's easier set constraints than to litter code with sanity checks.
+
+#### Leakproof Abstraction
+
+There is no ORM involved. Creating new views happens in SQL with known performance implications. A database administrator can now create an API from scratch with no custom programming. 
+
+#### Embracing the Relational Model
+
+In 1970 E. F. Codd criticized the then-dominant hierarchical model of databases in his article <a href="https://www.seas.upenn.edu/~zives/03f/cis550/codd.pdf">A Relational Model of Data for Large Shared Data Banks</a>. Reading the article reveals a striking similarity between hierarchical databases and nested http routes. With PostgREST we attempt to use flexible filtering and embedding rather than nested routes.
+
+#### One Thing Well
+
+PostgREST has a focused scope. It works well with other tools like Nginx. This forces you to cleanly separate the data-centric CRUD operations from other concerns. Use a collection of sharp tools rather than building a big ball of mud.
+
+#### Shared Improvements
+
+As with any open source project, we all gain from features and fixes in the tool. It's more beneficial than improvements locked inextricably within custom codebases.
+
+### Myths
+
+#### You have to make tons of stored procs and triggers
+
+Modern PostgreSQL features like auto-updatable views and computed columns make this mostly unnecessary. Triggers do play a part, but generally not for irksome boilerplate. When they are required triggers are preferable to ad-hoc app code anyway, since the former work reliably for any codepath.
+
+#### Exposing the database destroys encapsulation
+
+PostgREST does versioning through database schemas. This allows you to expose tables and views without making the app brittle. Underlying tables can be superseded and hidden behind public facing views. The chapter about versioning shows how to do this.
+
+### Conventions
+
+This guide contains highlighted notes and tangential information interspersed with the text.
+
+<div class="admonition note">
+    <p class="admonition-title">Design Consideration</p>
+
+    <p>Contains history which informed the current design. Sometimes it discusses unavoidable tradeoffs or a point of theory.</p>
+</div>
+
+<div class="admonition warning">
+    <p class="admonition-title">Invitation to Contribute</p>
+
+    <p>Points out things we know we want to add or improve. They might give you ideas for ways to contribute to the project.</p>
+</div>
+
+<div class="admonition danger">
+    <p class="admonition-title">Deprecation Warning</p>
+
+    <p>Alerts you to features which will be removed in the next major (breaking) release.</p>
+</div>

docs/install/ecosystem.md

@@ -0,0 +1,23 @@
+## Ecosystem
+
+### Client-Side Libraries
+
+* [mithril.postgrest](https://github.com/catarse/mithril.postgrest) - Mithril plugin to create and authenticate requests
+* [lewisjared/postgrest-request](https://github.com/lewisjared/postgrest-request) - node interface to postgrest instances
+* [JarvusInnovations/jarvus-postgrest-apikit](https://github.com/JarvusInnovations/jarvus-postgrest-apikit) - Sencha framework package for binding models/stores/proxies to PostgREST tables
+
+### Extensions
+
+* [srid/spas](https://github.com/srid/spas) - allow file uploads and basic auth
+
+### Example Apps
+
+* [timwis/ext-postgrest-crud](https://github.com/timwis/ext-postgrest-crud) - browser-based spreadsheet
+* [srid/chronicle](https://github.com/srid/chronicle#deploying-to-heroku) - tracking a tree of personal memories
+* [begriffs/postgrest-example](https://github.com/begriffs/postgrest-example) - how to configure a db for use as an API
+* [marmelab/ng-admin-postgrest](https://github.com/marmelab/ng-admin-postgrest) - automatic database admin panel
+* [tyrchen/goodfilm](https://github.com/tyrchen/goodfilm) - example film api
+
+### In Production
+
+* [Catarse](https://www.catarse.me/)

docs/install/server.md

@@ -0,0 +1,62 @@
+## Installation
+
+### Installing from Pre-Built Release
+
+The [release page](https://github.com/begriffs/postgrest/releases/latest) has precompiled binaries for Mac OS X and 64-bit Ubuntu. Next extract the tarball and run the binary inside with no arguments to see usage instructions:
+
+```sh
+# Untar the release (available at https://github.com/begriffs/postgrest/releases/latest)
+
+$ tar zxf postgrest-0.2.12.0-osx.tar.xz
+
+# Try running it
+$ ./postgrest
+
+# You should see a usage help message
+```
+
+<div class="admonition warning">
+    <p class="admonition-title">Invitation to Contribute</p>
+
+    <p>I currently build the binaries manually for each version. We need to set up an automated build matrix for various architectures. It should support 32- and 64-bit versions of
+
+    <ul><li>Scientific Linux 6</li><li>CentOS</li><li>RHEL 6</li></ul>
+
+    Also it would be good to create packages for Homebrew, and apt.</p>
+</div>
+
+We'll learn the meaning of the command line flags later, but here is a minimal example of running the app. It does all operations as user `postgres`, including for unauthenticated requests.
+
+```sh
+$ ./postgrest -d dbname -U postgres --a postgres --v1schema public
+```
+
+### Building from Source
+
+When a prebuilt binary does not exist for your system you can build the project from source. You'll also need to do this if you want to help with development. [Stack](https://github.com/commercialhaskell/stack) makes it easy. It will install any necessary Haskell dependencies on your system.
+
+* [Install Stack](https://github.com/commercialhaskell/stack#how-to-install) for your platform
+* Build the project
+
+```bash
+git clone https://github.com/begriffs/postgrest.git
+cd postgrest
+stack build
+```
+
+* Run the server
+
+```bash
+stack exec postgrest -- arg1 arg2
+# ... your arguments after the double dashes
+```
+
+If you want to run the test suite, stack can do that too: `stack test`.
+
+### Installing PostgreSQL
+
+To use PostgREST you will need an underlying database. You can use something like Amazon [RDS](https://aws.amazon.com/rds/) but installing your own locally is cheaper and more convenient for development.
+
+* [Instructions for OS X](http://exponential.io/blog/2015/02/21/install-postgresql-on-mac-os-x-via-brew/)
+* [Instructions for Ubuntu 14.04](https://www.digitalocean.com/community/tutorials/how-to-install-and-use-postgresql-on-ubuntu-14-04)
+

mkdocs.yml

@@ -0,0 +1,24 @@
+site_name: PostgREST
+site_url: http://postgrest.com
+site_description: Building declarative APIs
+site_author: Joe Nelson
+site_favicon: favicon.ico
+
+repo_url: https://github.com/begriffs/postgrest
+
+pages:
+- Home: index.md
+- Install:
+  - The Server: install/server.md
+  - Ecosystem: install/ecosystem.md
+- API:
+  - Reading: api/reading.md
+  - Writing: api/writing.md
+- Admin:
+  - Security: admin/security.md
+  - Versioning: admin/versioning.md
+  - Migration: admin/migration.md
+  - Deployment: admin/deployment.md
+  - Performance: admin/performance.md
+- Examples:
+  - Getting Started: examples/start.md

postgrest.cabal

@@ -1,89 +1,167 @@
 name:                  postgrest
-version:               0.2.4.7
-synopsis:              The database is your api
+description:           Reads the schema of a PostgreSQL database and creates RESTful routes
+                       for the tables and views, supporting all HTTP verbs that security
+                       permits.
+version:               0.2.12.0
+synopsis:              REST API for any Postgres database
 license:               MIT
 license-file:          LICENSE
 author:                Joe Nelson, Adam Baker
+homepage:              https://github.com/begriffs/postgrest
 maintainer:            cred+github@begriffs.com
 category:              Web
 build-type:            Simple
 cabal-version:         >=1.10
+source-repository head
+  type: git
+  location: git://github.com/begriffs/postgrest.git
+
+Flag CI
+  Description: No warnings allowed in continuous integration
+  Manual:      True
+  Default:     False
 
 executable postgrest
-  main-is:             Main.hs
-  ghc-options:         -Wall -W -Werror -O2
+  main-is:             PostgREST/Main.hs
+  default-extensions:  OverloadedStrings, ScopedTypeVariables, QuasiQuotes
   default-language:    Haskell2010
-  default-extensions:  OverloadedStrings
-  other-extensions:    QuasiQuotes
   build-depends:       base >=4.6 && <5
-                     , hasql == 0.4.*, hasql-backend
-                     , hasql-postgres == 0.8.*
+                     , postgrest
+                     , hasql >= 0.7.3 && < 0.8
+                     , hasql-backend >= 0.4.1 && < 0.5
+                     , hasql-postgres >= 0.10.4 && < 0.11
                      , warp >= 3.0.2, wai >= 3.0.1
                      , wai-extra, wai-cors
                      , wai-middleware-static >= 0.6.0
                      , HTTP, convertible, http-types
                      , case-insensitive
                      , scientific, time
-                     , aeson, network >= 2.6
+                     , aeson >= 0.8, network >= 2.6
                      , bytestring, text, split, string-conversions
-                     , stringsearch, parsec
+                     , stringsearch
                      , containers, unordered-containers
-                     , optparse-applicative >= 0.9.1 && < 0.10
+                     , optparse-applicative >= 0.11 && < 0.13
                      , regex-base, regex-tdfa
-                     , regex-tdfa-text
                      , Ranged-sets
-                     , transformers
-                     , bcrypt, base64-string
+                     , transformers, MissingH
+                     , bcrypt >= 0.0.6, base64-string
                      , network-uri >= 2.6
                      , resource-pool
                      , blaze-builder
                      , vector
                      , mtl
-  Other-Modules:       App
-                     , Auth
-                     , Config
-                     , PgStructure
-                     , PgQuery
-                     , PgError
-                     , RangeQuery
-                     , Middleware
+                     , cassava
+                     , jwt
+                     , parsec
+                     , errors
+                     , bifunctors
+  hs-source-dirs:      src
+
+library
+  if flag(ci)
+    ghc-options:       -Wall -W -Werror
+  else
+    ghc-options:       -Wall -W -O2
+
+  default-language:    Haskell2010
+  default-extensions:  OverloadedStrings, ScopedTypeVariables, QuasiQuotes
+  build-depends:       base >=4.6 && <5
+                     , hasql, hasql-backend
+                     , hasql-postgres
+                     , warp, wai
+                     , wai-extra, wai-cors
+                     , wai-middleware-static
+                     , HTTP, convertible, http-types
+                     , case-insensitive
+                     , scientific, time
+                     , aeson, network
+                     , bytestring, text, split, string-conversions
+                     , stringsearch
+                     , containers, unordered-containers
+                     , optparse-applicative
+                     , regex-base, regex-tdfa
+                     , Ranged-sets
+                     , transformers, MissingH
+                     , bcrypt, base64-string
+                     , network-uri
+                     , resource-pool
+                     , blaze-builder
+                     , vector
+                     , mtl
+                     , cassava
+                     , jwt
+                     , parsec
+                     , errors
+                     , bifunctors
+
+  Other-Modules:       Paths_postgrest
+  Exposed-Modules:     PostgREST.App
+                     , PostgREST.Types
+                     , PostgREST.Parsers
+                     , PostgREST.QueryBuilder
+                     , PostgREST.Auth
+                     , PostgREST.Config
+                     , PostgREST.Error
+                     , PostgREST.Middleware
+                     , PostgREST.PgQuery
+                     , PostgREST.PgStructure
+                     , PostgREST.RangeQuery
   hs-source-dirs:      src
 
 Test-Suite spec
   Type:                exitcode-stdio-1.0
   Default-Language:    Haskell2010
-  default-extensions:  OverloadedStrings
-  other-extensions:    QuasiQuotes
+  default-extensions:  OverloadedStrings, ScopedTypeVariables, QuasiQuotes
   Hs-Source-Dirs:      test, src
-  ghc-options:         -Wall -W -Werror
-  Main-Is:             Spec.hs
-  Other-Modules:       App, Auth, Config, Spec, SpecHelper
-  Build-Depends:       base, hspec >= 2.0, QuickCheck
-                     , hspec-wai >= 0.5.0, hspec-wai-json
-                     , hasql == 0.4.*, hasql-backend
-                     , hasql-postgres == 0.8.*
-                     , warp >= 3.0.2, wai >= 3.0.1
+  if flag(ci)
+    ghc-options:       -Wall -W -Werror
+  else
+    ghc-options:       -Wall -W -O2
+  Main-Is:             Main.hs
+  Other-Modules:       PostgREST.App
+                     , PostgREST.Types
+                     , PostgREST.Parsers
+                     , PostgREST.QueryBuilder
+                     , PostgREST.Auth
+                     , PostgREST.Config
+                     , PostgREST.Error
+                     , PostgREST.Middleware
+                     , PostgREST.PgQuery
+                     , PostgREST.PgStructure
+                     , PostgREST.RangeQuery
+                     , Spec
+                     , SpecHelper
+                     , Paths_postgrest
+  Build-Depends:       base, hspec == 2.1.*, QuickCheck
+                     , hspec-wai, hspec-wai-json
+                     , hasql, hasql-backend
+                     , hasql-postgres
+                     , warp, wai
+                     , packdeps, hlint
                      , HTTP, convertible
                      , case-insensitive
                      , wai-extra, wai-cors, containers
-                     , wai-middleware-static >= 0.6.0
+                     , wai-middleware-static
                      , http-types, scientific, time
-                     , bytestring, aeson, network >= 2.6
+                     , bytestring, aeson, network
                      , text, optparse-applicative
-                     , stringsearch, parsec
+                     , stringsearch
                      , unordered-containers
                      , regex-base
                      , string-conversions
                      , http-media, regex-tdfa
-                     , regex-tdfa-text
                      , Ranged-sets
-                     , transformers
-                     , bcrypt
-                     , base64-string
-                     , split
-                     , network-uri >= 2.6
+                     , transformers, MissingH, split
+                     , bcrypt, base64-string
+                     , network-uri
                      , resource-pool
                      , blaze-builder
                      , vector
                      , mtl
+                     , cassava
                      , process
+                     , heredoc
+                     , jwt
+                     , parsec
+                     , errors
+                     , bifunctors

scripts/release_s3.sh

@@ -1,6 +1,6 @@
 export POSTGREST_VER=`grep ^version /app/postgrest.cabal | sed -En 's/.*\s+([0-9\.]+)/\1/p'`
 
-curl -L http://softlayer-ams.dl.sourceforge.net/project/s3tools/s3cmd/1.5.0-alpha1/s3cmd-1.5.0-alpha1.tar.gz | tar zx
+curl -L http://sourceforge.net/projects/s3tools/files/s3cmd/1.5.0-alpha1/s3cmd-1.5.0-alpha1.tar.gz | tar zx
 
 cp /app/dist/build/postgrest/postgrest postgrest-${POSTGREST_VER}
 tar cJf postgrest-${POSTGREST_VER}.tar.xz postgrest-${POSTGREST_VER}

src/App.hs

@@ -1,252 +0,0 @@
-{-# LANGUAGE FlexibleContexts #-}
-module App (app, sqlError, isSqlError) where
-
-import Control.Monad (join)
-import Control.Arrow ((***))
-import Control.Applicative
-
-import Data.Text hiding (map)
-import Data.Maybe (fromMaybe)
-import Text.Regex.TDFA ((=~))
-import Data.Ord (comparing)
-import Data.Ranged.Ranges (emptyRange)
-import Data.HashMap.Strict (keys, elems, filterWithKey, toList)
-import Data.String.Conversions (cs)
-import Data.List (sortBy)
-import Data.Functor.Identity
-import qualified Data.Set as S
-import qualified Data.ByteString.Lazy as BL
-
-import Network.HTTP.Types.Status
-import Network.HTTP.Types.Header
-import Network.HTTP.Types.URI (parseSimpleQuery)
-import Network.HTTP.Base (urlEncodeVars)
-import Network.Wai
-
-import Data.Aeson
-import Data.Monoid
-import qualified Hasql as H
-import qualified Hasql.Postgres as H
-
-import Auth
-import PgQuery
-import RangeQuery
-import PgStructure
-import PgError
-import Text.Parsec hiding (Column)
-
-app :: BL.ByteString -> Request -> H.Tx H.Postgres s Response
-app reqBody req =
-  case (path, verb) of
-    ([], _) -> do
-      body <- encode <$> tables (cs schema)
-      return $ responseLBS status200 [jsonH] $ cs body
-
-    ([table], "OPTIONS") -> do
-      let t = QualifiedTable schema (cs table)
-      cols <- columns t
-      pkey <- map cs <$> primaryKeyColumns t
-      return $ responseLBS status200 [jsonH, allOrigins]
-        $ encode (TableOptions cols pkey)
-
-    ([table], "GET") ->
-      if range == Just emptyRange
-      then return $ responseLBS status416 [] "HTTP Range error"
-      else do
-        let qt = QualifiedTable schema (cs table)
-        let select = coerce $
-              ("select ",[],mempty) <>
-                  parentheticT (
-                    whereT qq $ countRows qt
-                  ) <> commaq <> (
-                  asJsonWithCount
-                  . limitT range
-                  . orderT (orderParse qq)
-                  . whereT qq
-                  $ selectStar qt
-                )
-        row <- H.single select
-        let (tableTotal, queryTotal, body) =
-              fromMaybe (0, 0, Just "" :: Maybe Text) row
-            from = fromMaybe 0 $ rangeOffset <$> range
-            to = from+queryTotal-1
-            contentRange = contentRangeH from to tableTotal
-            status = rangeStatus from to tableTotal
-            canonical = urlEncodeVars
-                          . sortBy (comparing fst)
-                          . map (join (***) cs)
-                          . parseSimpleQuery
-                          $ rawQueryString req
-        return $ responseLBS status
-          [jsonH, contentRange,
-            ("Content-Location",
-             "/" <> cs table <>
-                if Prelude.null canonical then "" else "?" <> cs canonical
-            )
-          ] (cs $ fromMaybe "[]" body)
-
-    (["postgrest", "users"], "POST") -> do
-      let user = decode reqBody :: Maybe AuthUser
-
-      case user of
-        Nothing -> return $ responseLBS status400 [jsonH] $
-          encode . object $ [("message", String "Failed to parse user.")]
-        Just u -> do
-          _ <- addUser (cs $ userId u)
-            (cs $ userPass u) (cs $ userRole u)
-          return $ responseLBS status201
-            [ jsonH
-            , (hLocation, "/postgrest/users?id=eq." <> cs (userId u))
-            ] ""
-
-    ([table], "POST") ->
-      handleJsonObj reqBody $ \obj -> do
-        let qt = QualifiedTable schema (cs table)
-            query = coerce $
-              insertInto qt (map cs $ keys obj) (elems obj)
-        row <- H.single query
-        let (Identity insertedJson) = fromMaybe (Identity "{}" :: Identity Text) row
-            Just inserted = decode (cs insertedJson) :: Maybe Object
-
-        primaryKeys <- map cs <$> primaryKeyColumns qt
-        let primaries = if Prelude.null primaryKeys
-            then inserted
-            else filterWithKey (const . (`elem` primaryKeys)) inserted
-        let params = urlEncodeVars
-              $ map (\t -> (cs $ fst t, "eq." <> cs (unquoted $ snd t)))
-              $ sortBy (comparing fst) $ toList primaries
-        return $ responseLBS status201
-          [ jsonH
-          , (hLocation, "/" <> cs table <> "?" <> cs params)
-          ] ""
-
-    ([table], "PUT") ->
-      handleJsonObj reqBody $ \obj -> do
-        let qt = QualifiedTable schema (cs table)
-        primaryKeys <- primaryKeyColumns qt
-        let specifiedKeys = map (cs . fst) qq
-        if S.fromList primaryKeys /= S.fromList specifiedKeys
-          then return $ responseLBS status405 []
-               "You must speficy all and only primary keys as params"
-          else do
-            tableCols <- map (cs . colName) <$> columns qt
-            let cols = map cs $ keys obj
-            if S.fromList tableCols == S.fromList cols
-              then do
-                let vals = elems obj
-                H.unit . coerce $ iffNotT
-                        (whereT qq $ update qt cols vals)
-                        (insertSelect qt cols vals)
-                return $ responseLBS status204 [ jsonH ] ""
-
-              else return $ if Prelude.null tableCols
-                then responseLBS status404 [] ""
-                else responseLBS status400 []
-                   "You must specify all columns in PUT request"
-
-    ([table], "PATCH") ->
-      handleJsonObj reqBody $ \obj -> do
-        let qt = QualifiedTable schema (cs table)
-        H.unit
-          $ coerce
-          $ whereT qq
-          $ update qt (map cs $ keys obj) (elems obj)
-        return $ responseLBS status204 [ jsonH ] ""
-
-    (_, _) ->
-      return $ responseLBS status404 [] ""
-
-  where
-    path   = pathInfo req
-    verb   = requestMethod req
-    qq     = queryString req
-    hdrs   = requestHeaders req
-    schema = requestedSchema hdrs
-    range  = rangeRequested hdrs
-    allOrigins = ("Access-Control-Allow-Origin", "*") :: Header
-    coerce (q, args, All b) = (q, args, b)
-
-
-isSqlError :: H.Error -> Maybe H.Error
-isSqlError = Just
-
-sqlError :: H.Error -> Response
-sqlError err =
-  let inside = case err of
-        H.CantConnect t -> t
-        H.ConnectionLost t -> t
-        H.ErroneousResult t -> t
-        H.UnexpectedResult t -> t
-        H.UnparsableTemplate t -> t
-        H.UnparsableRow t -> t
-        H.NotInTransaction -> "An operation which requires a"
-          <> "database transaction was executed without one"
-      p = parse message
-        "{\"message\": \"failed to parse exception\" }" inside in
-  either
-    (\nope ->
-      responseLBS status500
-      [(hContentType, "application/json")]
-      (cs . show $ nope))
-    (\msg ->
-      responseLBS (httpStatus msg)
-      [(hContentType, "application/json")]
-      (encode msg))
-    p
-
-
-rangeStatus :: Int -> Int -> Int -> Status
-rangeStatus from to total
-  | from > total            = status416
-  | (1 + to - from) < total = status206
-  | otherwise               = status200
-
-contentRangeH :: Int -> Int -> Int -> Header
-contentRangeH from to total =
-  ("Content-Range",
-    if total == 0 || from > total
-    then "*/" <> cs (show total)
-    else cs (show from)  <> "-"
-       <> cs (show to)    <> "/"
-       <> cs (show total)
-  )
-
-requestedSchema :: RequestHeaders -> Text
-requestedSchema hdrs =
-  case verStr of
-       Just [[_, ver]] -> ver
-       _ -> "1"
-
-  where verRegex = "version[ ]*=[ ]*([0-9]+)" :: String
-        accept = cs <$> lookup hAccept hdrs :: Maybe Text
-        verStr = (=~ verRegex) <$> accept :: Maybe [[Text]]
-
-jsonH :: Header
-jsonH = (hContentType, "application/json")
-
-handleJsonObj :: BL.ByteString -> (Object -> H.Tx H.Postgres s Response)
-              -> H.Tx H.Postgres s Response
-handleJsonObj reqBody handler = do
-  let p = eitherDecode reqBody
-  case p of
-    Left err ->
-      return $ responseLBS status400 [jsonH] jErr
-      where
-        jErr = encode . object $
-          [("message", String $ "Failed to parse JSON payload. " <> cs err)]
-    Right (Object o) -> handler o
-    Right _ ->
-      return $ responseLBS status400 [jsonH] jErr
-      where
-        jErr = encode . object $
-          [("message", String "Expecting a JSON object")]
-
-data TableOptions = TableOptions {
-  tblOptcolumns :: [Column]
-, tblOptpkey :: [Text]
-}
-
-instance ToJSON TableOptions where
-  toJSON t = object [
-      "columns" .= tblOptcolumns t
-    , "pkey"   .= tblOptpkey t ]

src/Auth.hs

@@ -1,69 +0,0 @@
-{-# LANGUAGE QuasiQuotes, ScopedTypeVariables, OverloadedStrings #-}
-module Auth where
-
-import Data.Aeson
-import Control.Monad (mzero)
-import Control.Applicative ( (<*>), (<$>) )
-import Crypto.BCrypt
-import Data.Text
-import Data.Monoid
-import qualified Hasql as H
-import qualified Hasql.Postgres as H
-import Data.String.Conversions (cs)
-import PgQuery (pgFmtLit)
-
-import System.IO.Unsafe
-
-data AuthUser = AuthUser {
-    userId :: String
-  , userPass :: String
-  , userRole :: String
-  } deriving (Show)
-
-instance FromJSON AuthUser where
-  parseJSON (Object v) = AuthUser <$>
-                         v .: "id" <*>
-                         v .: "pass" <*>
-                         v .: "role"
-  parseJSON _ = mzero
-
-instance ToJSON AuthUser where
-  toJSON u = object [
-      "id" .= userId u
-    , "pass" .= userPass u
-    , "role" .= userRole u ]
-
-type DbRole = Text
-
-data LoginAttempt =
-    NoCredentials
-  | MalformedAuth
-  | LoginFailed
-  | LoginSuccess DbRole
-  deriving (Eq, Show)
-
-checkPass :: Text -> Text -> Bool
-checkPass = (. cs) . validatePassword . cs
-
-setRole :: Text -> H.Tx H.Postgres s ()
-setRole role = H.unit ("set role " <> cs (pgFmtLit role), [], True)
-
-resetRole :: H.Tx H.Postgres s ()
-resetRole = H.unit [H.q|reset role|]
-
-addUser :: Text -> Text -> Text -> H.Tx H.Postgres s ()
-addUser identity pass role = do
-  let Just hashed = unsafePerformIO $ hashPasswordUsingPolicy fastBcryptHashingPolicy (cs pass)
-  H.unit $
-    [H.q|insert into postgrest.auth (id, pass, rolname) values (?, ?, ?)|]
-      identity (cs hashed :: Text) role
-
-signInRole :: Text -> Text -> H.Tx H.Postgres s LoginAttempt
-signInRole user pass = do
-  u <- H.single $ [H.q|select pass, rolname from postgrest.auth where id = ?|] user
-  return $ maybe LoginFailed (\r ->
-      let (hashed, role) = r in
-      if checkPass hashed pass
-         then LoginSuccess role
-         else LoginFailed
-    ) u

src/Config.hs

@@ -1,54 +0,0 @@
-module Config where
-
-import Network.Wai
-import Control.Applicative
-import Data.Text (strip)
-import qualified Data.CaseInsensitive as CI
-import qualified Data.ByteString.Char8 as BS
-import Data.String.Conversions (cs)
-import Options.Applicative hiding (columns)
-import Network.Wai.Middleware.Cors (CorsResourcePolicy(..))
-
-data AppConfig = AppConfig {
-    configDbName :: String
-  , configDbPort :: Int
-  , configDbUser :: String
-  , configDbPass :: String
-  , configDbHost :: String
-
-  , configPort  :: Int
-  , configAnonRole :: String
-  , configSecure :: Bool
-  , configPool :: Int
-  }
-
-argParser :: Parser AppConfig
-argParser = AppConfig
-  <$> strOption (long "db-name" <> short 'd'                     <> help "name of database")
-  <*> option    (long "db-port" <> short 'P' <> value 5432        <> help "postgres server port")
-  <*> strOption (long "db-user" <> short 'U'                     <> help "postgres authenticator role")
-  <*> strOption (long "db-pass"             <> value ""          <> help "password for authenticator role")
-  <*> strOption (long "db-host" <> short 'h' <> value "localhost" <> help "postgres server hostname")
-
-  <*> option    (long "port" <> short 'p' <> value 3000 <> help "port number on which to run HTTP server")
-  <*> strOption (long "anonymous" <> short 'a' <> help "postgres role to use for non-authenticated requests")
-  <*> switch    (long "secure" <> short 's' <> help "Redirect all requests to HTTPS")
-  <*> option    (long "db-pool" <> value 10 <> help "Max connections in database pool")
-
-defaultCorsPolicy :: CorsResourcePolicy
-defaultCorsPolicy =  CorsResourcePolicy Nothing
-  ["GET", "POST", "PUT", "PATCH", "DELETE", "OPTIONS"] ["Authorization"] Nothing
-  (Just $ 60*60*24) False False True
-
-corsPolicy :: Request -> Maybe CorsResourcePolicy
-corsPolicy req = case lookup "origin" headers of
-  Just origin -> Just defaultCorsPolicy {
-      corsOrigins = Just ([origin], True)
-    , corsRequestHeaders = "Authentication":accHeaders
-    }
-  Nothing -> Nothing
-  where
-    headers = requestHeaders req
-    accHeaders = case lookup "access-control-request-headers" headers of
-      Just hdrs -> map (CI.mk . cs . strip . cs) $ BS.split ',' hdrs
-      Nothing -> []

src/Main.hs

@@ -1,63 +0,0 @@
-module Main where
-
-import Paths_postgrest (version)
-
-import App
-import Middleware
-
-import Control.Monad (unless)
-import Control.Monad.IO.Class (liftIO)
-import Control.Exception
-import Data.String.Conversions (cs)
-import Network.Wai (strictRequestBody)
-import Network.Wai.Middleware.Cors (cors)
-import Network.Wai.Handler.Warp hiding (Connection)
-import Network.Wai.Middleware.Gzip (gzip, def)
-import Network.Wai.Middleware.Static (staticPolicy, only)
-import Data.List (intercalate)
-import Data.Version (versionBranch)
-import qualified Hasql as H
-import qualified Hasql.Postgres as H
-import Options.Applicative hiding (columns)
-
-import Config (AppConfig(..), argParser, corsPolicy)
-
-main :: IO ()
-main = do
-  conf <- execParser (info (helper <*> argParser) describe)
-  let port = configPort conf
-
-  unless (configSecure conf) $
-    putStrLn "WARNING, running in insecure mode, auth will be in plaintext"
-  Prelude.putStrLn $ "Listening on port " ++
-    (show $ configPort conf :: String)
-
-  let pgSettings = H.ParamSettings (cs $ configDbHost conf)
-                     (fromIntegral $ configDbPort conf)
-                     (cs $ configDbUser conf)
-                     (cs $ configDbPass conf)
-                     (cs $ configDbName conf)
-
-  sessSettings <- maybe (fail "Improper session settings") return $
-                    H.sessionSettings (fromIntegral $ configPool conf) 30
-
-  let appSettings = setPort port
-                  . setServerName (cs $ "postgrest/" <> prettyVersion)
-                  $ defaultSettings
-      middle =
-        (if configSecure conf then redirectInsecure else id)
-        . gzip def . cors corsPolicy
-        . staticPolicy (only [("favicon.ico", "static/favicon.ico")])
-      anonRole = cs $ configAnonRole conf
-
-  H.session pgSettings sessSettings $ H.sessionUnlifter >>= \unlift ->
-    liftIO $ runSettings appSettings $ middle $ \req respond -> do
-      body <- strictRequestBody req
-      respond =<< catchJust isSqlError
-        (unlift $ H.tx Nothing
-                $ authenticated anonRole (app body) req)
-        (return . sqlError)
-
-  where
-    describe = progDesc "create a REST API to an existing Postgres database"
-    prettyVersion = intercalate "." $ map show $ versionBranch version

src/Middleware.hs

@@ -1,88 +0,0 @@
-{-# OPTIONS_GHC -fno-warn-orphans #-}
-{-# LANGUAGE ScopedTypeVariables #-}
-
-module Middleware where
-
-import Data.Maybe (fromMaybe)
-import Data.Monoid (mconcat)
-import Data.Text
--- import Data.Pool(withResource, Pool)
-
-import qualified Hasql as H
-import qualified Hasql.Postgres as H
-import Data.String.Conversions(cs)
-
-import Network.HTTP.Types.Header (hLocation, hAuthorization)
-import Network.HTTP.Types (RequestHeaders)
-import Network.HTTP.Types.Status (status400, status401, status301)
-import Network.Wai (Application, requestHeaders, responseLBS, rawPathInfo,
-                   rawQueryString, isSecure, Request(..), Response)
-import Network.URI (URI(..), parseURI)
-
-import Auth (LoginAttempt(..), signInRole, setRole, resetRole)
-import Codec.Binary.Base64.String (decode)
-
--- data Environment = Test | Production deriving (Eq)
-
--- safeAction :: Request -> Bool
--- safeAction = (`notElem` ["PATCH", "PUT"]) . requestMethod
-
--- withSavepoint :: Environment -> (Connection -> Application) ->
---                  Connection -> Application
--- withSavepoint env app conn req respond =
---   if env == Production && safeAction req
---     then go
---     else Database.PostgreSQL.Simple.withSavepoint conn go
---   where go = app conn req respond
-
-authenticated :: forall s. Text -> (Request -> H.Tx H.Postgres s Response) ->
-       Request -> H.Tx H.Postgres s Response
-authenticated anon app req = do
-  attempt <- httpRequesterRole (requestHeaders req)
-  case attempt of
-    MalformedAuth ->
-      return $ responseLBS status400 [] "Malformed basic auth header"
-    LoginFailed ->
-      return $ responseLBS status401 [] "Invalid username or password"
-    LoginSuccess role -> runInRole role
-    NoCredentials -> runInRole anon
-
- where
-   httpRequesterRole :: RequestHeaders -> H.Tx H.Postgres s LoginAttempt
-   httpRequesterRole hdrs = do
-    let auth = fromMaybe "" $ lookup hAuthorization hdrs
-    case split (==' ') (cs auth) of
-      ("Basic" : b64 : _) ->
-        case split (==':') (cs . decode . cs $ b64) of
-          (u:p:_) -> signInRole u p
-          _ -> return MalformedAuth
-      _ -> return NoCredentials
-
-   runInRole :: Text -> H.Tx H.Postgres s Response
-   runInRole r = do
-     setRole r
-     res <- app req
-     resetRole
-     return res
-
-
-redirectInsecure :: Application -> Application
-redirectInsecure app req respond = do
-  let hdrs = requestHeaders req
-      host = lookup "host" hdrs
-      uriM = parseURI . cs =<< mconcat [
-        Just "https://",
-        host,
-        Just $ rawPathInfo req,
-        Just $ rawQueryString req]
-      isHerokuSecure = lookup "x-forwarded-proto" hdrs == Just "https"
-
-  if not (isSecure req || isHerokuSecure)
-    then case uriM of
-              Just uri ->
-                respond $ responseLBS status301 [
-                    (hLocation, cs . show $ uri { uriScheme = "https:" })
-                  ] ""
-              Nothing ->
-                respond $ responseLBS status400 [] "SSL is required"
-    else app req respond

src/PgError.hs

@@ -1,86 +0,0 @@
-{-# LANGUAGE OverloadedStrings #-}
-
-module PgError (Message(..), message, httpStatus) where
-
-import Text.Parsec
-import Text.Parsec.Text
-import qualified Data.Map as M
-import Text.Regex.TDFA.Text ()
-import Data.Text hiding (drop, concat, head)
-import Data.Aeson
-import Data.Maybe
-import Control.Monad (void)
-
-import Data.String.Conversions (cs)
-import Data.CaseInsensitive (CI, mk)
-
-import Network.HTTP.Types.Status
-
-data Message = Message {
-    msgStatus :: Maybe Text
-  , msgCode   :: Text
-  , msgText   :: Maybe Text
-  , msgHint   :: Maybe Text
-} deriving (Show, Eq)
-
-message :: Parser Message
-message = do
-  ps <- sepBy valPair (char ';')
-  let m = M.fromList ps
-  return $ Message
-    (M.lookup "status" m)
-    (fromMaybe "" $ M.lookup "code" m)
-    (M.lookup "message" m)
-    (M.lookup "hint" m)
-
-valPair :: Parser (CI Text, Text)
-valPair = do
-  _ <- spaces
-  name <- many1 letter
-  _ <- char ':'
-  spaces
-  _ <- many $ char '"'
-  val <- manyTill anyChar $
-    try
-      (void $ many (char '"') >> (
-        (void . lookAhead $ (char ';'))
-        <|> ((optional $ char '.') >> eof)
-      ))
-  return (mk (cs name), cs val)
-
-
-instance ToJSON Message where
-  toJSON t = object [
-      "message" .= msgText t
-    , "code"    .= msgCode t
-    , "status"  .= msgStatus t
-    , "hint"    .= msgHint t
-    ]
-
-httpStatus :: Message -> Status
-httpStatus m =
-  let code = cs $ msgCode m :: String in
-  case code of
-    '0' : '8' : _ -> status503 -- pg connection err
-    '0' : '9' : _ -> status500 -- triggered action exception
-    '0' : 'L' : _ -> status403 -- invalid grantor
-    '0' : 'P' : _ -> status403 -- invalid role specification
-    '2' : '5' : _ -> status500 -- invalid tx state
-    '2' : '8' : _ -> status403 -- invalid auth specification
-    '2' : 'D' : _ -> status500 -- invalid tx termination
-    '3' : '8' : _ -> status500 -- external routine exception
-    '3' : '9' : _ -> status500 -- external routine invocation
-    '3' : 'B' : _ -> status500 -- savepoint exception
-    '4' : '0' : _ -> status500 -- tx rollback
-    '5' : '3' : _ -> status503 -- insufficient resources
-    '5' : '4' : _ -> status413 -- too complex
-    '5' : '5' : _ -> status500 -- obj not on prereq state
-    '5' : '7' : _ -> status500 -- operator intervention
-    '5' : '8' : _ -> status500 -- system error
-    'F' : '0' : _ -> status500 -- conf file error
-    'H' : 'V' : _ -> status500 -- foreign data wrapper error
-    'P' : '0' : _ -> status500 -- PL/pgSQL Error
-    'X' : 'X' : _ -> status500 -- internal Error
-    "42P01" -> status404 -- undefined table
-    "42501" -> status404 -- insufficient privilege
-    _ -> status400

src/PgQuery.hs

@@ -1,220 +0,0 @@
-{-# LANGUAGE TypeSynonymInstances, FlexibleInstances #-}
-module PgQuery where
-
-import RangeQuery
-
-import qualified Hasql.Postgres as H
-import qualified Hasql.Backend as H
-
-import Data.Text hiding (map)
-import Text.Regex.TDFA ( (=~) )
-import Text.Regex.TDFA.Text ()
-import qualified Network.HTTP.Types.URI as Net
-import qualified Data.ByteString.Char8 as BS
-import Data.Monoid
-import Data.Maybe (fromMaybe, mapMaybe)
-import Data.Functor ( (<$>) )
-import Control.Monad (join)
-import Data.String.Conversions (cs)
-import qualified Data.Aeson as JSON
-import qualified Data.List as L
-import Data.Scientific (isInteger, formatScientific, FPFormat(..))
-
-type DynamicSQL = (BS.ByteString, [H.StatementArgument H.Postgres], All)
-
-type StatementT = DynamicSQL -> DynamicSQL
-
-data QualifiedTable = QualifiedTable {
-  qtSchema :: Text
-, qtName   :: Text
-} deriving (Show)
-
-data OrderTerm = OrderTerm {
-  otTerm :: Text
-, otDirection :: BS.ByteString
-}
-
-limitT :: Maybe NonnegRange -> StatementT
-limitT r q =
-  q <> (" LIMIT " <> limit <> " OFFSET " <> offset <> " ", [], mempty)
-  where
-    limit  = maybe "ALL" (cs . show) $ join $ rangeLimit <$> r
-    offset = cs . show $ fromMaybe 0 $ rangeOffset <$> r
-
-whereT :: Net.Query -> StatementT
-whereT params q =
- if L.null params
-   then q
-   else q <> (" where ",[],mempty) <> conjunction
- where
-   cols = [ col | col <- params, fst col `notElem` ["order"] ]
-   conjunction = mconcat $ L.intersperse andq (map wherePred cols)
-
-orderT :: [OrderTerm] -> StatementT
-orderT ts q =
-  if L.null ts
-    then q
-    else q <> (" order by ",[],mempty) <> clause
-  where
-   clause = mconcat $ L.intersperse commaq (map queryTerm ts)
-   queryTerm :: OrderTerm -> DynamicSQL
-   queryTerm t = (" " <> cs (pgFmtIdent $ otTerm t) <> " "
-                      <> otDirection t              <> " "
-                  , [], mempty)
-
-parentheticT :: StatementT
-parentheticT (sql, params, pre) =
-  (" (" <> sql <> ") ", params, pre)
-
-iffNotT :: DynamicSQL -> StatementT
-iffNotT (aq, ap, apre) (bq, bp, bpre) =
-  ("WITH aaa AS (" <> aq <> " returning *) " <>
-    bq <> " WHERE NOT EXISTS (SELECT * FROM aaa)"
-  , ap ++ bp
-  , All $ getAll apre && getAll bpre
-  )
-
-countRows :: QualifiedTable -> DynamicSQL
-countRows t =
-  ("select count(1) from " <> fromQt t, [], mempty)
-
-asJsonWithCount :: StatementT
-asJsonWithCount (sql, params, pre) = (
-    "count(t), array_to_json(array_agg(row_to_json(t)))::character varying from (" <> sql <> ") t"
-  , params, pre
-  )
-
-asJsonRow :: StatementT
-asJsonRow (sql, params, pre) = (
-    "row_to_json(t) from (" <> sql <> ") t", params, pre
-  )
-
-selectStar :: QualifiedTable -> DynamicSQL
-selectStar t =
-  ("select * from " <> fromQt t, [], mempty)
-
-insertInto :: QualifiedTable -> [Text] -> [JSON.Value] -> DynamicSQL
-insertInto t [] _ =
-  ("insert into " <> fromQt t <> " default values returning *", [], mempty)
-insertInto t cols vals =
-  ("insert into " <> fromQt t <> " (" <>
-    cs (intercalate ", " (map pgFmtIdent cols)) <>
-    ") values (" <>
-    cs (
-      intercalate ", " (map
-        ((<> "::unknown") . pgFmtLit . unquoted)
-        vals)
-    ) <> ") returning row_to_json(" <> fromQt t <> ".*)"
-  , []
-  , mempty
-  )
-
-insertSelect :: QualifiedTable -> [Text] -> [JSON.Value] -> DynamicSQL
-insertSelect t [] _ =
-  ("insert into " <> fromQt t <> " default values returning *", [], mempty)
-insertSelect t cols vals =
-  ("insert into " <> fromQt t <> " (" <>
-    cs (intercalate ", " (map pgFmtIdent cols)) <>
-    ") select " <>
-    cs (
-      intercalate ", " (map
-        ((<> "::unknown") . pgFmtLit . unquoted)
-        vals)
-    )
-  , []
-  , mempty
-  )
-
-update :: QualifiedTable -> [Text] -> [JSON.Value] -> DynamicSQL
-update t cols vals =
-  ("update " <> fromQt t <> " set (" <>
-    cs (intercalate ", " (map pgFmtIdent cols)) <>
-    ") = (" <>
-    cs (
-      intercalate ", " (map
-        ((<> "::unknown") . pgFmtLit . unquoted)
-        vals)
-    ) <> ")"
-  , []
-  , mempty
-  )
-
-wherePred :: Net.QueryItem -> DynamicSQL
-wherePred (col, predicate) =
-  (" " <> cs (pgFmtIdent $ cs col) <> " " <> op <> " " <> cs (pgFmtLit value) <> "::unknown ", [], mempty)
-
-  where
-    opCode:rest = split (=='.') $ cs $ fromMaybe "." predicate
-    value = intercalate "." rest
-    op = case opCode of
-         "eq"  -> "="
-         "gt"  -> ">"
-         "lt"  -> "<"
-         "gte" -> ">="
-         "lte" -> "<="
-         "neq" -> "<>"
-         _     -> "="
-
-orderParse :: Net.Query -> [OrderTerm]
-orderParse q =
-  mapMaybe orderParseTerm . split (==',') $ cs order
-  where
-    order = fromMaybe "" $ join (lookup "order" q)
-
-orderParseTerm :: Text -> Maybe OrderTerm
-orderParseTerm s =
-  case split (=='.') s of
-       [d,c] ->
-         if d `elem` ["asc", "desc"]
-            then Just $ OrderTerm c $
-              if d == "asc" then "asc" else "desc"
-            else Nothing
-       _ -> Nothing
-
-commaq :: DynamicSQL
-commaq  = (", ", [], mempty)
-
-andq :: DynamicSQL
-andq = (" and ", [], mempty)
-
-pgFmtIdent :: Text -> Text
-pgFmtIdent x =
-  let escaped = replace "\"" "\"\"" (trimNullChars $ cs x) in
-  if escaped =~ danger
-    then "\"" <> escaped <> "\""
-    else escaped
-
-  where danger = "^$|^[^a-z_]|[^a-z_0-9]" :: Text
-
-pgFmtLit :: Text -> Text
-pgFmtLit x =
-  let trimmed = trimNullChars x
-      escaped = "'" <> replace "'" "''" trimmed <> "'"
-      slashed = replace "\\" "\\\\" escaped in
-  cs $ if escaped =~ ("\\\\" :: Text)
-    then "E" <> slashed
-    else slashed
-
-trimNullChars :: Text -> Text
-trimNullChars = Data.Text.takeWhile (/= '\x0')
-
-fromQt :: QualifiedTable -> BS.ByteString
-fromQt t = cs $ pgFmtIdent (qtSchema t) <> "." <> pgFmtIdent (qtName t)
-
-unquoted :: JSON.Value -> Text
-unquoted (JSON.String t) = t
-unquoted (JSON.Number n) =
-  cs $ formatScientific Fixed (if isInteger n then Just 0 else Nothing) n
-unquoted (JSON.Bool b) = cs . show $ b
-unquoted _ = ""
-
-pgParam :: JSON.Value -> H.StatementArgument H.Postgres
-pgParam (JSON.Number n) = H.renderValue
-  (cs $ formatScientific Fixed
-       (if isInteger n then Just 0 else Nothing) n :: Text)
-pgParam (JSON.String s) = H.renderValue s
-pgParam (JSON.Bool      b) = H.renderValue $
-  if b then "t" else "f" :: Text
-pgParam JSON.Null       = H.renderValue (Nothing :: Maybe Text)
-pgParam (JSON.Object o) = H.renderValue $ JSON.encode o
-pgParam (JSON.Array  a) = H.renderValue $ JSON.encode a

src/PgStructure.hs

@@ -1,188 +0,0 @@
-{-# LANGUAGE QuasiQuotes, OverloadedStrings, TypeSynonymInstances,
-             MultiParamTypeClasses, ScopedTypeVariables #-}
-module PgStructure where
-
-import PgQuery (QualifiedTable(..))
-import Data.Functor ( (<$>) )
-import Data.Text hiding (foldl, map, zipWith, concat)
-import Data.Aeson
-import Data.Functor.Identity
-import qualified Data.Vector as V
-import Data.String.Conversions (cs)
-
-import Control.Applicative ( (<*>) )
-
-import qualified Data.List as L
-import qualified Data.Map as Map
-
-import qualified Hasql as H
-import qualified Hasql.Backend as H
-import qualified Hasql.Postgres as H
-
-foreignKeys :: QualifiedTable -> H.Tx H.Postgres s (Map.Map Text ForeignKey)
-foreignKeys table = do
-  r :: [(Text, Text, Text)] <- H.list $ [H.q|
-      select kcu.column_name, ccu.table_name AS foreign_table_name,
-        ccu.column_name AS foreign_column_name
-      from information_schema.table_constraints AS tc
-        join information_schema.key_column_usage AS kcu
-          on tc.constraint_name = kcu.constraint_name
-        join information_schema.constraint_column_usage AS ccu
-          on ccu.constraint_name = tc.constraint_name
-      where constraint_type = 'FOREIGN KEY'
-        and tc.table_name=? and tc.table_schema = ?
-        order by kcu.column_name
-    |] (qtName table) (qtSchema table)
-
-  return $ foldl addKey Map.empty r
-  where
-    addKey m (col, ftab, fcol) = Map.insert col (ForeignKey (cs ftab) (cs fcol)) m
-
-
-tables :: Text -> H.Tx H.Postgres s [Table]
-tables schema =
-  H.list $ [H.q|
-      select table_schema, table_name,
-             is_insertable_into
-        from information_schema.tables
-       where table_schema = ?
-       order by table_name
-    |] schema
-
-
-columns :: QualifiedTable -> H.Tx H.Postgres s [Column]
-columns table = do
-  cols <- H.list $ [H.q|
-    select info.table_schema as schema, info.table_name as table_name,
-           info.column_name as name, info.ordinal_position as position,
-           info.is_nullable as nullable, info.data_type as col_type,
-           info.is_updatable as updatable,
-           info.character_maximum_length as max_len,
-           info.numeric_precision as precision,
-           info.column_default as default_value,
-           array_to_string(enum_info.vals, ',') as enum
-       from (
-         select table_schema, table_name, column_name, ordinal_position,
-                is_nullable, data_type, is_updatable,
-                character_maximum_length, numeric_precision,
-                column_default, udt_name
-           from information_schema.columns
-          where table_schema = ? and table_name = ?
-       ) as info
-       left outer join (
-         select n.nspname as s,
-                t.typname as n,
-                array_agg(e.enumlabel ORDER BY e.enumsortorder) as vals
-         from pg_type t
-            join pg_enum e on t.oid = e.enumtypid
-            join pg_catalog.pg_namespace n ON n.oid = t.typnamespace
-         group by s, n
-       ) as enum_info
-       on (info.udt_name = enum_info.n)
-    order by position |] (qtSchema table) (qtName table)
-
-  fks <- foreignKeys table
-  return $ map (\col -> col { colFK = Map.lookup (cs . colName $ col) fks }) cols
-
-
-primaryKeyColumns :: QualifiedTable -> H.Tx H.Postgres s [Text]
-primaryKeyColumns table = do
-  r :: [Identity Text] <- H.list $ [H.q|
-    select kc.column_name
-      from
-        information_schema.table_constraints tc,
-        information_schema.key_column_usage kc
-    where
-      tc.constraint_type = 'PRIMARY KEY'
-      and kc.table_name = tc.table_name and kc.table_schema = tc.table_schema
-      and kc.constraint_name = tc.constraint_name
-      and kc.table_schema = ?
-      and kc.table_name  = ? |] (qtSchema table) (qtName table)
-  return $ map runIdentity r
-
-
-vanishNull :: [a] -> Maybe [a]
-vanishNull xs = if L.null xs then Nothing else Just xs
-
-toBool :: Text -> Bool
-toBool = (== "YES")
-
-data Table = Table {
-  tableSchema :: Text
-, tableName :: Text
-, tableInsertable :: Bool
-} deriving (Show)
-
-data ForeignKey = ForeignKey {
-  fkTable::Text, fkCol::Text
-} deriving (Eq, Show)
-
-data Column = Column {
-  colSchema :: Text
-, colTable :: Text
-, colName :: Text
-, colPosition :: Int
-, colNullable :: Bool
-, colType :: Text
-, colUpdatable :: Bool
-, colMaxLen :: Maybe Int
-, colPrecision :: Maybe Int
-, colDefault :: Maybe Text
-, colEnum :: [Text]
-, colFK :: Maybe ForeignKey
-} deriving (Show)
-
-instance H.RowParser H.Postgres Column where
-  parseRow r =
-    let schema     = H.parseResult $ r V.! 0
-        table      = H.parseResult $ r V.! 1
-        name       = H.parseResult $ r V.! 2
-        position   = H.parseResult $ r V.! 3
-        nullable   = toBool <$> (H.parseResult $ r V.! 4 :: Either Text Text)
-        typ        = H.parseResult $ r V.! 5
-        updatable  = toBool <$> (H.parseResult $ r V.! 6 :: Either Text Text)
-        maxLen     = H.parseResult $ r V.! 7
-        precision  = H.parseResult $ r V.! 8
-        defValue   = H.parseResult $ r V.! 9
-        enum       = either (const $ Right []) (Right . split (==','))
-                       (H.parseResult $ r V.! 10 :: Either Text Text)
-      in
-    if V.length r /= 11
-       then Left "Wrong number of fields in Column"
-       else Column <$> schema <*> table <*> name <*> position <*> nullable
-                   <*> typ <*> updatable <*> maxLen <*> precision
-                   <*> defValue <*> enum
-                   <*> return Nothing
-
-
-instance H.RowParser H.Postgres Table where
-  parseRow r =
-    let schema     = H.parseResult $ r V.! 0
-        name       = H.parseResult $ r V.! 1
-        insertable = toBool <$> (H.parseResult $ r V.! 2 :: Either Text Text) in
-    if V.length r /= 3
-       then Left "Wrong number of fields in Table"
-       else Table <$> schema <*> name <*> insertable
-
-instance ToJSON Column where
-  toJSON c = object [
-      "schema"    .= colSchema c
-    , "name"      .= colName c
-    , "position"  .= colPosition c
-    , "nullable"  .= colNullable c
-    , "type"      .= colType c
-    , "updatable" .= colUpdatable c
-    , "maxLen"    .= colMaxLen c
-    , "precision" .= colPrecision c
-    , "references".= colFK c
-    , "default"   .= colDefault c
-    , "enum"      .= colEnum c ]
-
-instance ToJSON ForeignKey where
-  toJSON fk = object ["table".=fkTable fk, "column".=fkCol fk]
-
-instance ToJSON Table where
-  toJSON v = object [
-      "schema"     .= tableSchema v
-    , "name"       .= tableName v
-    , "insertable" .= tableInsertable v ]

src/PostgREST/App.hs

@@ -0,0 +1,416 @@
+{-# LANGUAGE FlexibleContexts    #-}
+{-# LANGUAGE ScopedTypeVariables #-}
+module PostgREST.App (
+  app
+, sqlError
+, isSqlError
+, contentTypeForAccept
+, jsonH
+, requestedSchema
+, TableOptions(..)
+) where
+
+import qualified Blaze.ByteString.Builder  as BB
+import           Control.Applicative
+import           Control.Arrow             (second, (***))
+import           Control.Monad             (join)
+import           Data.Bifunctor            (first)
+import qualified Data.ByteString.Char8     as BS
+import qualified Data.ByteString.Lazy      as BL
+import           Data.CaseInsensitive      (original)
+import qualified Data.Csv                  as CSV
+import           Data.Functor.Identity
+import qualified Data.HashMap.Strict       as M
+import           Data.List                 (find, sortBy)
+import           Data.Maybe                (fromMaybe, isJust, isNothing,
+                                            mapMaybe)
+import           Data.Ord                  (comparing)
+import           Data.Ranged.Ranges        (emptyRange)
+import qualified Data.Set                  as S
+import           Data.String.Conversions   (cs)
+import           Data.Text                 (Text, replace, strip)
+import           Text.Regex.TDFA           ((=~))
+
+import           Text.Parsec.Error
+
+import           Network.HTTP.Base         (urlEncodeVars)
+import           Network.HTTP.Types.Header
+import           Network.HTTP.Types.Status
+import           Network.HTTP.Types.URI    (parseSimpleQuery)
+import           Network.Wai
+import           Network.Wai.Internal      (Response (..))
+import           Network.Wai.Parse         (parseHttpAccept)
+
+import           Data.Aeson
+import           Data.Monoid
+import qualified Data.Vector               as V
+import qualified Hasql                     as H
+import qualified Hasql.Backend             as B
+import qualified Hasql.Postgres            as P
+
+import           PostgREST.Auth
+import           PostgREST.Config          (AppConfig (..))
+import           PostgREST.Parsers
+import           PostgREST.PgQuery
+import           PostgREST.PgStructure
+import           PostgREST.QueryBuilder
+import           PostgREST.RangeQuery
+import           PostgREST.Types
+
+import           Prelude
+
+app :: DbStructure -> AppConfig -> BL.ByteString -> DbRole -> Request -> H.Tx P.Postgres s Response
+app dbstructure conf reqBody dbrole req =
+  case (path, verb) of
+
+    ([], _) -> do
+      let body = encode $ filter (filterTableAcl dbrole) $ filter ((cs schema==).tableSchema) allTabs
+      return $ responseLBS status200 [jsonH] $ cs body
+
+    ([table], "OPTIONS") -> do
+      let cols = filter (filterCol schema table) allCols
+          pkeys = map pkName $ filter (filterPk schema table) allPrKeys
+          body = encode (TableOptions cols pkeys)
+      return $ responseLBS status200 [jsonH, allOrigins] $ cs body
+
+    ([table], "GET") ->
+      if range == Just emptyRange
+      then return $ responseLBS status416 [] "HTTP Range error"
+      else
+        case queries of
+          Left e -> return $ responseLBS status400 [("Content-Type", "application/json")] $ cs e
+          Right (qs, cqs) -> do
+            let qt = qualify table
+                count = if hasPrefer "count=none"
+                      then countNone
+                      else cqs
+                q = B.Stmt "select " V.empty True <>
+                    parentheticT count
+                    <> commaq <> (
+                    bodyForAccept contentType qt -- TODO! when in csv mode, the first row (columns) is not correct when requesting sub tables
+                    . limitT range
+                    $ qs
+                  )
+            row <- H.maybeEx q
+            let (tableTotal, queryTotal, body) = fromMaybe (Just (0::Int), 0::Int, Just "" :: Maybe BL.ByteString) row
+                to = from+queryTotal-1
+                contentRange = contentRangeH from to tableTotal
+                status = rangeStatus from to tableTotal
+                canonical = urlEncodeVars
+                  . sortBy (comparing fst)
+                  . map (join (***) cs)
+                  . parseSimpleQuery
+                  $ rawQueryString req
+            return $ responseLBS status
+              [contentTypeH, contentRange,
+                ("Content-Location",
+                  "/" <> cs table <>
+                    if Prelude.null canonical then "" else "?" <> cs canonical
+                )
+              ] (fromMaybe "[]" body)
+
+        where
+            from = fromMaybe 0 $ rangeOffset <$> range
+            apiRequest = first formatParserError (parseGetRequest req)
+                     >>= first formatRelationError . addRelations schema allRels Nothing
+                     >>= addJoinConditions schema allCols
+                     where
+                       formatRelationError :: Text -> Text
+                       formatRelationError e = cs $ encode $ object [
+                         "mesage" .= ("could not find foreign keys between these entities"::String),
+                         "details" .= e]
+                       formatParserError :: ParseError -> Text
+                       formatParserError e = cs $ encode $ object [
+                         "message" .= message,
+                         "details" .= details]
+                         where
+                           message = show (errorPos e)
+                           details = strip $ replace "\n" " " $ cs
+                             $ showErrorMessages "or" "unknown parse error" "expecting" "unexpected" "end of input" (errorMessages e)
+
+            query = requestToQuery schema <$> apiRequest
+            countQuery = requestToCountQuery schema <$> apiRequest
+            queries = (,) <$> query <*> countQuery
+
+
+    (["postgrest", "users"], "POST") -> do
+      let user = decode reqBody :: Maybe AuthUser
+
+      case user of
+        Nothing -> return $ responseLBS status400 [jsonH] $
+          encode . object $ [("message", String "Failed to parse user.")]
+        Just u -> do
+          _ <- addUser (cs $ userId u)
+            (cs $ userPass u) (cs <$> userRole u)
+          return $ responseLBS status201
+            [ jsonH
+            , (hLocation, "/postgrest/users?id=eq." <> cs (userId u))
+            ] ""
+
+    (["postgrest", "tokens"], "POST") ->
+      case jwtSecret of
+        "secret" -> return $ responseLBS status500 [jsonH] $
+          encode . object $ [("message", String "JWT Secret is set as \"secret\" which is an unsafe default.")]
+        _ -> do
+          let user = decode reqBody :: Maybe AuthUser
+
+          case user of
+            Nothing -> return $ responseLBS status400 [jsonH] $
+              encode . object $ [("message", String "Failed to parse user.")]
+            Just u -> do
+              setRole authenticator
+              login <- signInRole (cs $ userId u) (cs $ userPass u)
+              case login of
+                LoginSuccess role uid ->
+                  return $ responseLBS status201 [ jsonH ] $
+                    encode . object $ [("token", String $ tokenJWT jwtSecret uid role)]
+                _  -> return $ responseLBS status401 [jsonH] $
+                  encode . object $ [("message", String "Failed authentication.")]
+
+    ([table], "POST") -> do
+      let qt = qualify table
+          echoRequested = hasPrefer "return=representation"
+          parsed :: Either String (V.Vector Text, V.Vector (V.Vector Value))
+          parsed = if lookupHeader "Content-Type" == Just csvMT
+            then do
+              rows <- CSV.decode CSV.NoHeader reqBody
+              if V.null rows then Left "CSV requires header"
+                else Right (V.head rows, (V.map $ V.map $ parseCsvCell . cs) (V.tail rows))
+            else eitherDecode reqBody >>= \val ->
+              case val of
+                Object obj -> Right .  second V.singleton .  V.unzip .  V.fromList $
+                  M.toList obj
+                _ -> Left "Expecting single JSON object or CSV rows"
+      case parsed of
+        Left err -> return $ responseLBS status400 [] $
+          encode . object $ [("message", String $ "Failed to parse JSON payload. " <> cs err)]
+        Right toBeInserted -> do
+          rows :: [Identity Text] <- H.listEx $ uncurry (insertInto qt) toBeInserted
+          let inserted :: [Object] = mapMaybe (decode . cs . runIdentity) rows
+              pKeys = map pkName $ filter (filterPk schema table) allPrKeys
+              responses = flip map inserted $ \obj -> do
+                let primaries =
+                      if Prelude.null pKeys
+                        then obj
+                        else M.filterWithKey (const . (`elem` pKeys)) obj
+                let params = urlEncodeVars
+                      $ map (\t -> (cs $ fst t, cs (paramFilter $ snd t)))
+                      $ sortBy (comparing fst) $ M.toList primaries
+                responseLBS status201
+                  [ jsonH
+                  , (hLocation, "/" <> cs table <> "?" <> cs params)
+                  ] $ if echoRequested then encode obj else ""
+          return $ multipart status201 responses
+
+    (["rpc", proc], "POST") -> do
+      let qi = QualifiedIdentifier schema (cs proc)
+      exists <- doesProcExist schema proc
+      if exists
+        then do
+          let call = B.Stmt "select " V.empty True <>
+                asJson (callProc qi $ fromMaybe M.empty (decode reqBody))
+          body :: Maybe (Identity Text) <- H.maybeEx call
+          return $ responseLBS status200 [jsonH]
+            (cs $ fromMaybe "[]" $ runIdentity <$> body)
+        else return $ responseLBS status404 [] ""
+
+      -- check that proc exists
+      -- check that arg names are all specified
+      -- select * from "1".proc(a := "foo"::undefined) where whereT limit limitT
+
+    ([table], "PUT") ->
+      handleJsonObj reqBody $ \obj -> do
+        let qt = qualify table
+            pKeys = map pkName $ filter (filterPk schema table) allPrKeys
+            specifiedKeys = map (cs . fst) qq
+        if S.fromList pKeys /= S.fromList specifiedKeys
+          then return $ responseLBS status405 []
+            "You must speficy all and only primary keys as params"
+          else do
+            let tableCols = map (cs . colName) $ filter (filterCol schema table) allCols
+                cols = map cs $ M.keys obj
+            if S.fromList tableCols == S.fromList cols
+              then do
+                let vals = M.elems obj
+                H.unitEx $ iffNotT
+                  (whereT qt qq $ update qt cols vals)
+                  (insertSelect qt cols vals)
+                return $ responseLBS status204 [ jsonH ] ""
+
+              else return $ if Prelude.null tableCols
+                then responseLBS status404 [] ""
+                else responseLBS status400 []
+                  "You must specify all columns in PUT request"
+
+    ([table], "PATCH") ->
+      handleJsonObj reqBody $ \obj -> do
+        let qt = qualify table
+            up = returningStarT
+              . whereT qt qq
+              $ update qt (map cs $ M.keys obj) (M.elems obj)
+            patch = withT up "t" $ B.Stmt
+              "select count(t), array_to_json(array_agg(row_to_json(t)))::character varying"
+              V.empty True
+
+        row <- H.maybeEx patch
+        let (queryTotal, body) =
+              fromMaybe (0 :: Int, Just "" :: Maybe Text) row
+            r = contentRangeH 0 (queryTotal-1) (Just queryTotal)
+            echoRequested = hasPrefer "return=representation"
+            s = case () of _ | queryTotal == 0 -> status404
+                             | echoRequested -> status200
+                             | otherwise -> status204
+        return $ responseLBS s [ jsonH, r ] $ if echoRequested then cs $ fromMaybe "[]" body else ""
+
+    ([table], "DELETE") -> do
+      let qt = qualify table
+          del = countT
+            . returningStarT
+            . whereT qt qq
+            $ deleteFrom qt
+      row <- H.maybeEx del
+      let (Identity deletedCount) = fromMaybe (Identity 0 :: Identity Int) row
+      return $ if deletedCount == 0
+        then responseLBS status404 [] ""
+        else responseLBS status204 [("Content-Range", "*/"<> cs (show deletedCount))] ""
+
+    (_, _) ->
+      return $ responseLBS status404 [] ""
+
+  where
+    allTabs = tables dbstructure
+    allRels = relations dbstructure
+    allCols = columns dbstructure
+    allPrKeys = primaryKeys dbstructure
+    filterCol sc table (Column{colSchema=s, colTable=t}) =  s==sc && table==t
+    filterCol _ _ _ =  False
+    filterPk sc table pk = sc == pkSchema pk && table == pkTable pk
+
+    filterTableAcl :: Text -> Table -> Bool
+    filterTableAcl r (Table{tableAcl=a}) = r `elem` a
+    path          = pathInfo req
+    verb          = requestMethod req
+    qq            = queryString req
+    qualify       = QualifiedIdentifier schema
+    hdrs          = requestHeaders req
+    lookupHeader  = flip lookup hdrs
+    hasPrefer val = any (\(h,v) -> h == "Prefer" && v == val) hdrs
+    accept        = lookupHeader hAccept
+    schema        = requestedSchema (cs $ configV1Schema conf) accept
+    authenticator = cs $ configDbUser conf
+    jwtSecret     = cs $ configJwtSecret conf
+    range         = rangeRequested hdrs
+    allOrigins    = ("Access-Control-Allow-Origin", "*") :: Header
+    contentType   = fromMaybe "application/json" $ contentTypeForAccept accept
+    contentTypeH  = (hContentType, contentType)
+
+sqlError :: t
+sqlError = undefined
+
+isSqlError :: t
+isSqlError = undefined
+
+rangeStatus :: Int -> Int -> Maybe Int -> Status
+rangeStatus _ _ Nothing = status200
+rangeStatus from to (Just total)
+  | from > total            = status416
+  | (1 + to - from) < total = status206
+  | otherwise               = status200
+
+contentRangeH :: Int -> Int -> Maybe Int -> Header
+contentRangeH from to total =
+    ("Content-Range", cs headerValue)
+    where
+      headerValue   = rangeString <> "/" <> totalString
+      rangeString
+        | totalNotZero && fromInRange = show from <> "-" <> cs (show to)
+        | otherwise = "*"
+      totalString   = fromMaybe "*" (show <$> total)
+      totalNotZero  = fromMaybe True ((/=) 0 <$> total)
+      fromInRange   = from <= to
+
+requestedSchema :: Text -> Maybe BS.ByteString -> Text
+requestedSchema v1schema accept =
+  case verStr of
+    Just [[_, ver]] -> if ver == "1" then v1schema else cs ver
+    _ -> v1schema
+
+  where
+    verRegex = "version[ ]*=[ ]*([0-9]+)" :: BS.ByteString
+    verStr = (=~ verRegex) <$> accept :: Maybe [[BS.ByteString]]
+
+
+jsonMT :: BS.ByteString
+jsonMT = "application/json"
+
+csvMT :: BS.ByteString
+csvMT = "text/csv"
+
+allMT :: BS.ByteString
+allMT = "*/*"
+
+jsonH :: Header
+jsonH = (hContentType, jsonMT)
+
+contentTypeForAccept :: Maybe BS.ByteString -> Maybe BS.ByteString
+contentTypeForAccept accept
+  | isNothing accept || has allMT || has jsonMT = Just jsonMT
+  | has csvMT = Just csvMT
+  | otherwise = Nothing
+  where
+    Just acceptH = accept
+    findInAccept = flip find $ parseHttpAccept acceptH
+    has          = isJust . findInAccept . BS.isPrefixOf
+
+bodyForAccept :: BS.ByteString -> QualifiedIdentifier  -> StatementT
+bodyForAccept contentType table
+  | contentType == csvMT = asCsvWithCount table
+  | otherwise = asJsonWithCount -- defaults to JSON
+
+handleJsonObj :: BL.ByteString -> (Object -> H.Tx P.Postgres s Response)
+              -> H.Tx P.Postgres s Response
+handleJsonObj reqBody handler = do
+  let p = eitherDecode reqBody
+  case p of
+    Left err ->
+      return $ responseLBS status400 [jsonH] jErr
+      where
+        jErr = encode . object $
+          [("message", String $ "Failed to parse JSON payload. " <> cs err)]
+    Right (Object o) -> handler o
+    Right _ ->
+      return $ responseLBS status400 [jsonH] jErr
+      where
+        jErr = encode . object $
+          [("message", String "Expecting a JSON object")]
+
+parseCsvCell :: BL.ByteString -> Value
+parseCsvCell s = if s == "NULL" then Null else String $ cs s
+
+multipart :: Status -> [Response] -> Response
+multipart _ [] = responseLBS status204 [] ""
+multipart _ [r] = r
+multipart s rs =
+  responseLBS s [(hContentType, "multipart/mixed; boundary=\"postgrest_boundary\"")] $
+    BL.intercalate "\n--postgrest_boundary\n" (map renderResponseBody rs)
+
+  where
+    renderHeader :: Header -> BL.ByteString
+    renderHeader (k, v) = cs (original k) <> ": " <> cs v
+
+    renderResponseBody :: Response -> BL.ByteString
+    renderResponseBody (ResponseBuilder _ headers b) =
+      BL.intercalate "\n" (map renderHeader headers)
+        <> "\n\n" <> BB.toLazyByteString b
+    renderResponseBody _ = error
+      "Unable to create multipart response from non-ResponseBuilder"
+
+data TableOptions = TableOptions {
+  tblOptcolumns :: [Column]
+, tblOptpkey    :: [Text]
+}
+
+instance ToJSON TableOptions where
+  toJSON t = object [
+      "columns" .= tblOptcolumns t
+    , "pkey"   .= tblOptpkey t ]

src/PostgREST/Auth.hs

@@ -0,0 +1,104 @@
+module PostgREST.Auth where
+
+import           Control.Applicative
+import           Control.Monad           (mzero)
+import           Crypto.BCrypt
+import           Data.Aeson
+import           Data.Map
+import           Data.Monoid
+import           Data.String.Conversions (cs)
+import           Data.Text
+import           Data.Maybe (isNothing)
+import qualified Data.Vector             as V
+import qualified Hasql                   as H
+import qualified Hasql.Backend           as B
+import qualified Hasql.Postgres          as P
+import           PostgREST.PgQuery       (pgFmtLit)
+import           Prelude
+import qualified Web.JWT                 as JWT
+
+import           System.IO.Unsafe
+
+data AuthUser = AuthUser {
+    userId   :: String
+  , userPass :: String
+  , userRole :: Maybe String
+  } deriving (Show)
+
+instance FromJSON AuthUser where
+  parseJSON (Object v) = AuthUser <$>
+                         v .: "id" <*>
+                         v .: "pass" <*>
+                         v .:? "role"
+  parseJSON _ = mzero
+
+instance ToJSON AuthUser where
+  toJSON u = object [
+      "id" .= userId u
+    , "pass" .= userPass u
+    , "role" .= userRole u ]
+
+type DbRole = Text
+type UserId = Text
+
+data LoginAttempt =
+    NoCredentials
+  | MalformedAuth
+  | LoginFailed
+  | LoginSuccess DbRole UserId
+  deriving (Eq, Show)
+
+checkPass :: Text -> Text -> Bool
+checkPass = (. cs) . validatePassword . cs
+
+setRole :: Text -> H.Tx P.Postgres s ()
+setRole role = H.unitEx $ B.Stmt ("set local role " <> cs (pgFmtLit role)) V.empty True
+
+setUserId :: Text -> H.Tx P.Postgres s ()
+setUserId uid =
+  if uid /= ""
+    then H.unitEx $ B.Stmt ("set local user_vars.user_id = " <> cs (pgFmtLit uid)) V.empty True
+    else resetUserId
+
+resetUserId :: H.Tx P.Postgres s ()
+resetUserId = H.unitEx [H.stmt|reset user_vars.user_id|]
+
+addUser :: Text -> Text -> Maybe Text -> H.Tx P.Postgres s ()
+addUser identity pass role =
+  H.unitEx $
+    if isNothing role
+      then [H.stmt|insert into postgrest.auth (id, pass) values (?, ?)|]
+        identity hashedText
+      else [H.stmt|insert into postgrest.auth (id, pass, rolname) values (?, ?, ?)|]
+        identity hashedText role
+  where Just hashed = unsafePerformIO $ hashPasswordUsingPolicy fastBcryptHashingPolicy (cs pass)
+        hashedText = cs hashed :: Text
+
+signInRole :: Text -> Text -> H.Tx P.Postgres s LoginAttempt
+signInRole user pass = do
+  u <- H.maybeEx $ [H.stmt|select id, pass, rolname from postgrest.auth where id = ?|] user
+  return $ maybe LoginFailed (\r ->
+      let (uid, hashed, role) = r in
+      if checkPass hashed pass
+         then LoginSuccess role uid
+         else LoginFailed
+    ) u
+
+signInWithJWT :: Text -> Text -> LoginAttempt
+signInWithJWT secret input = case maybeRole of
+    Just (Just (String role)) -> case maybeUserId of
+      Just (Just (String uid)) -> LoginSuccess (cs role) (cs uid)
+      _   -> LoginFailed
+    _   -> LoginFailed
+  where
+    maybeRole = (Data.Map.lookup "role" <$> claims) ::Maybe (Maybe Value)
+    maybeUserId = (Data.Map.lookup "id" <$> claims) ::Maybe (Maybe Value)
+    claims = JWT.unregisteredClaims <$> JWT.claims <$> decoded
+    decoded = JWT.decodeAndVerifySignature (JWT.secret secret) input
+
+tokenJWT :: Text -> Text -> Text -> Text
+tokenJWT secret uid role = JWT.encodeSigned JWT.HS256 (JWT.secret secret) claimsSet
+  where
+    claimsSet = JWT.def {
+      JWT.unregisteredClaims = Data.Map.fromList [("id", String uid), ("role", String role)]
+    }

src/PostgREST/Config.hs

@@ -0,0 +1,108 @@
+{-|
+Module      : PostgREST.Config
+Description : Manages PostgREST configuration options.
+
+This module provides a helper function to read the command line arguments using the optparse-applicative
+and the AppConfig type to store them.
+It also can be used to define other middleware configuration that may be delegated to some sort of
+external configuration.
+
+It currently includes a hardcoded CORS policy but this could easly be turned in configurable behaviour if needed.
+
+Other hardcoded options such as the minimum version number also belong here.
+-}
+module PostgREST.Config ( prettyVersion
+                        , readOptions
+                        , corsPolicy
+                        , minimumPgVersion
+                        , AppConfig (..)
+                        )
+       where
+
+import           Control.Applicative
+import qualified Data.ByteString.Char8       as BS
+import qualified Data.CaseInsensitive        as CI
+import           Data.List                   (intercalate)
+import           Data.String.Conversions     (cs)
+import           Data.Text                   (strip)
+import           Data.Version                (versionBranch)
+import           Network.Wai
+import           Network.Wai.Middleware.Cors (CorsResourcePolicy (..))
+import           Options.Applicative         hiding (columns)
+import           Paths_postgrest             (version)
+import           Prelude
+
+-- | Data type to store all command line options
+data AppConfig = AppConfig {
+    configDbName    :: String
+  , configDbPort    :: Int
+  , configDbUser    :: String
+  , configDbPass    :: String
+  , configDbHost    :: String
+
+  , configPort      :: Int
+  , configAnonRole  :: String
+  , configSecure    :: Bool
+  , configPool      :: Int
+  , configV1Schema  :: String
+  , configJwtSecret :: String
+  }
+
+argParser :: Parser AppConfig
+argParser = AppConfig
+  <$> strOption (long "db-name" <> short 'd' <> metavar "NAME" <> help "name of database")
+  <*> option auto (long "db-port" <> short 'P' <> metavar "PORT" <> value 5432 <> help "postgres server port" <> showDefault)
+  <*> strOption (long "db-user" <> short 'U' <> metavar "ROLE" <> help "postgres authenticator role")
+  <*> strOption (long "db-pass" <> metavar "PASS" <> value "" <> help "password for authenticator role")
+  <*> strOption (long "db-host" <> metavar "HOST" <> value "localhost" <> help "postgres server hostname" <> showDefault)
+
+  <*> option auto (long "port" <> short 'p' <> metavar "PORT" <> value 3000 <> help "port number on which to run HTTP server" <> showDefault)
+  <*> strOption (long "anonymous" <> short 'a' <> metavar "ROLE" <> help "postgres role to use for non-authenticated requests")
+  <*> switch (long "secure" <> short 's' <> help "Redirect all requests to HTTPS")
+  <*> option auto (long "db-pool" <> metavar "COUNT" <> value 10 <> help "Max connections in database pool" <> showDefault)
+  <*> strOption (long "v1schema" <> metavar "NAME" <> value "1" <> help "Schema to use for nonspecified version (or explicit v1)" <> showDefault)
+  <*> strOption (long "jwt-secret" <> metavar "SECRET" <> value "secret" <> help "Secret used to encrypt and decrypt JWT tokens)" <> showDefault)
+
+defaultCorsPolicy :: CorsResourcePolicy
+defaultCorsPolicy =  CorsResourcePolicy Nothing
+  ["GET", "POST", "PUT", "PATCH", "DELETE", "OPTIONS"] ["Authorization"] Nothing
+  (Just $ 60*60*24) False False True
+
+-- | CORS policy to be used in by Wai Cors middleware
+corsPolicy :: Request -> Maybe CorsResourcePolicy
+corsPolicy req = case lookup "origin" headers of
+  Just origin -> Just defaultCorsPolicy {
+      corsOrigins = Just ([origin], True)
+    , corsRequestHeaders = "Authentication":accHeaders
+    , corsExposedHeaders = Just [
+        "Content-Encoding", "Content-Location", "Content-Range", "Content-Type"
+      , "Date", "Location", "Server", "Transfer-Encoding", "Range-Unit"
+      ]
+    }
+  Nothing -> Nothing
+  where
+    headers = requestHeaders req
+    accHeaders = case lookup "access-control-request-headers" headers of
+      Just hdrs -> map (CI.mk . cs . strip . cs) $ BS.split ',' hdrs
+      Nothing -> []
+
+-- | User friendly version number
+prettyVersion :: String
+prettyVersion = intercalate "." $ map show $ versionBranch version
+
+-- | Function to read and parse options from the command line
+readOptions :: IO AppConfig
+readOptions = customExecParser parserPrefs opts
+  where
+    opts = info (helper <*> argParser) $
+                    fullDesc
+                    <> progDesc (
+                    "PostgREST "
+                    <> prettyVersion
+                    <> " / create a REST API to an existing Postgres database"
+                    )
+    parserPrefs = prefs showHelpOnError
+
+-- | Tells the minimum PostgreSQL version required by this version of PostgREST
+minimumPgVersion :: Integer
+minimumPgVersion = 90300

src/PostgREST/Error.hs

@@ -0,0 +1,73 @@
+{-# OPTIONS_GHC -fno-warn-orphans #-}
+{-# LANGUAGE FlexibleInstances    #-}
+{-# LANGUAGE TypeSynonymInstances #-}
+
+module PostgREST.Error (PgError, errResponse) where
+
+
+import           Data.Aeson                ((.=))
+import qualified Data.Aeson                as JSON
+import           Data.String.Conversions   (cs)
+import           Data.String.Utils         (replace)
+import qualified Data.Text                 as T
+import qualified Hasql                     as H
+import qualified Hasql.Postgres            as P
+import           Network.HTTP.Types.Header
+import qualified Network.HTTP.Types.Status as HT
+import           Network.Wai               (Response, responseLBS)
+
+type PgError = H.SessionError P.Postgres
+
+errResponse :: PgError -> Response
+errResponse e = responseLBS (httpStatus e)
+  [(hContentType, "application/json")] (JSON.encode e)
+
+instance JSON.ToJSON PgError where
+  toJSON (H.TxError (P.ErroneousResult c m d h)) = JSON.object [
+    "code" .= (cs c::T.Text),
+    "message" .= (cs m::T.Text),
+    "details" .= (fmap cs d::Maybe T.Text),
+    "hint" .= (fmap cs h::Maybe T.Text)]
+  toJSON (H.TxError (P.NoResult d)) = JSON.object [
+    "message" .= ("No response from server"::T.Text),
+    "details" .= (fmap cs d::Maybe T.Text)]
+  toJSON (H.TxError (P.UnexpectedResult m)) = JSON.object ["message" .= m]
+  toJSON (H.TxError P.NotInTransaction) = JSON.object [
+    "message" .= ("Not in transaction"::T.Text)]
+  toJSON (H.CxError (P.CantConnect d)) = JSON.object [
+    "message" .= ("Can't connect to the database"::T.Text),
+    "details" .= (fmap cs d::Maybe T.Text)]
+  toJSON (H.CxError (P.UnsupportedVersion v)) = JSON.object [
+    "message" .= ("Postgres version "++version++" is not supported") ]
+      where version = replace "0" "." (show v)
+  toJSON (H.ResultError m) = JSON.object ["message" .= m]
+
+httpStatus :: PgError -> HT.Status
+httpStatus (H.TxError (P.ErroneousResult codeBS _ _ _)) =
+  let code = cs codeBS in
+  case code of
+    '0':'8':_ -> HT.status503 -- pg connection err
+    '0':'9':_ -> HT.status500 -- triggered action exception
+    '0':'L':_ -> HT.status403 -- invalid grantor
+    '0':'P':_ -> HT.status403 -- invalid role specification
+    '2':'5':_ -> HT.status500 -- invalid tx state
+    '2':'8':_ -> HT.status403 -- invalid auth specification
+    '2':'D':_ -> HT.status500 -- invalid tx termination
+    '3':'8':_ -> HT.status500 -- external routine exception
+    '3':'9':_ -> HT.status500 -- external routine invocation
+    '3':'B':_ -> HT.status500 -- savepoint exception
+    '4':'0':_ -> HT.status500 -- tx rollback
+    '5':'3':_ -> HT.status503 -- insufficient resources
+    '5':'4':_ -> HT.status413 -- too complex
+    '5':'5':_ -> HT.status500 -- obj not on prereq state
+    '5':'7':_ -> HT.status500 -- operator intervention
+    '5':'8':_ -> HT.status500 -- system error
+    'F':'0':_ -> HT.status500 -- conf file error
+    'H':'V':_ -> HT.status500 -- foreign data wrapper error
+    'P':'0':_ -> HT.status500 -- PL/pgSQL Error
+    'X':'X':_ -> HT.status500 -- internal Error
+    "42P01" -> HT.status404 -- undefined table
+    "42501" -> HT.status404 -- insufficient privilege
+    _ -> HT.status400
+httpStatus (H.TxError (P.NoResult _)) = HT.status503
+httpStatus _ = HT.status500

src/PostgREST/Main.hs

@@ -0,0 +1,97 @@
+module Main where
+
+
+import           PostgREST.PgStructure
+import           PostgREST.Types
+import           Network.Wai
+
+import           PostgREST.App
+import           PostgREST.Error                      (errResponse)
+import           PostgREST.Middleware
+
+import           Control.Monad                        (unless)
+import           Control.Monad.IO.Class               (liftIO)
+import           Data.Functor.Identity
+import           Data.Monoid                          ((<>))
+import           Data.String.Conversions              (cs)
+import           Data.Text                            (Text)
+import qualified Hasql                                as H
+import qualified Hasql.Postgres                       as P
+import           Network.Wai.Handler.Warp             hiding (Connection)
+import           Network.Wai.Middleware.RequestLogger (logStdout)
+
+import           System.IO                            (BufferMode (..),
+                                                       hSetBuffering, stderr,
+                                                       stdin, stdout)
+
+import           PostgREST.Config                     (AppConfig (..),
+                                                       prettyVersion,
+                                                       readOptions,
+                                                       minimumPgVersion)
+
+isServerVersionSupported :: H.Session P.Postgres IO Bool
+isServerVersionSupported = do
+  Identity (row :: Text) <- H.tx Nothing $ H.singleEx $ [H.stmt|SHOW server_version_num|]
+  return $ read (cs row) >= minimumPgVersion
+
+main :: IO ()
+main = do
+  hSetBuffering stdout LineBuffering
+  hSetBuffering stdin  LineBuffering
+  hSetBuffering stderr NoBuffering
+
+  conf <- readOptions
+  let port = configPort conf
+
+  unless (configSecure conf) $
+    putStrLn "WARNING, running in insecure mode, auth will be in plaintext"
+  unless ("secret" /= configJwtSecret conf) $
+    putStrLn "WARNING, running in insecure mode, JWT secret is the default value"
+  Prelude.putStrLn $ "Listening on port " ++
+    (show $ configPort conf :: String)
+
+  let pgSettings = P.ParamSettings (cs $ configDbHost conf)
+                     (fromIntegral $ configDbPort conf)
+                     (cs $ configDbUser conf)
+                     (cs $ configDbPass conf)
+                     (cs $ configDbName conf)
+      appSettings = setPort port
+                  . setServerName (cs $ "postgrest/" <> prettyVersion)
+                  $ defaultSettings
+      middle = logStdout . defaultMiddle (configSecure conf)
+
+  poolSettings <- maybe (fail "Improper session settings") return $
+    H.poolSettings (fromIntegral $ configPool conf) 30
+  pool :: H.Pool P.Postgres <- H.acquirePool pgSettings poolSettings
+
+  supportedOrError <- H.session pool isServerVersionSupported
+  either (fail . show)
+    (\supported ->
+      unless supported $
+        fail "Cannot run in this PostgreSQL version, PostgREST needs at least 9.2.0"
+    ) supportedOrError
+
+  let txSettings = Just (H.ReadCommitted, Just True)
+  metadata <- H.session pool $ H.tx txSettings $ do
+    tabs <- allTables
+    rels <- allRelations
+    cols <- allColumns rels
+    keys <- allPrimaryKeys
+    return (tabs, rels, cols, keys)
+
+  dbstructure <- case metadata of
+    Left e -> fail $ show e
+    Right (tabs, rels, cols, keys) ->
+      return DbStructure {
+          tables=tabs
+        , columns=cols
+        , relations=rels
+        , primaryKeys=keys
+        }
+
+
+  runSettings appSettings $ middle $ \ req respond -> do
+    body <- strictRequestBody req
+    resOrError <- liftIO $ H.session pool $ H.tx txSettings $
+      authenticated conf (app dbstructure conf body) req
+    either (respond . errResponse) respond resOrError

src/PostgREST/Middleware.hs

@@ -0,0 +1,105 @@
+{-# OPTIONS_GHC -fno-warn-orphans #-}
+{-# LANGUAGE ScopedTypeVariables #-}
+
+module PostgREST.Middleware where
+
+import           Data.Maybe                    (fromMaybe, isNothing)
+import           Data.Monoid
+import           Data.Text
+import           Data.String.Conversions       (cs)
+import qualified Hasql                         as H
+import qualified Hasql.Postgres                as P
+
+import           Network.HTTP.Types            (RequestHeaders)
+import           Network.HTTP.Types.Header     (hAccept, hAuthorization,
+                                                hLocation)
+import           Network.HTTP.Types.Status     (status301, status400, status401,
+                                                status415)
+import           Network.URI                   (URI (..), parseURI)
+import           Network.Wai                   (Application, Request (..),
+                                                Response, isSecure, rawPathInfo,
+                                                rawQueryString, requestHeaders,
+                                                responseLBS)
+import           Network.Wai.Middleware.Cors   (cors)
+import           Network.Wai.Middleware.Gzip   (def, gzip)
+import           Network.Wai.Middleware.Static (only, staticPolicy)
+
+import           Codec.Binary.Base64.String    (decode)
+import           PostgREST.App                 (contentTypeForAccept)
+import           PostgREST.Auth                (DbRole, LoginAttempt (..),
+                                                setRole, setUserId, signInRole,
+                                                signInWithJWT)
+import           PostgREST.Config              (AppConfig (..), corsPolicy)
+
+import           Prelude
+
+authenticated :: forall s. AppConfig ->
+                 (DbRole -> Request -> H.Tx P.Postgres s Response) ->
+                 Request -> H.Tx P.Postgres s Response
+authenticated conf app req = do
+  attempt <- httpRequesterRole (requestHeaders req)
+  case attempt of
+    MalformedAuth ->
+      return $ responseLBS status400 [] "Malformed basic auth header"
+    LoginFailed ->
+      return $ responseLBS status401 [] "Invalid username or password"
+    LoginSuccess role uid -> if role /= currentRole then runInRole role uid else app currentRole req
+    NoCredentials         -> if anon /= currentRole then runInRole anon "" else app currentRole req
+
+ where
+   jwtSecret = cs $ configJwtSecret conf
+   currentRole = cs $ configDbUser conf
+   anon = cs $ configAnonRole conf
+   httpRequesterRole :: RequestHeaders -> H.Tx P.Postgres s LoginAttempt
+   httpRequesterRole hdrs = do
+    let auth = fromMaybe "" $ lookup hAuthorization hdrs
+    case split (==' ') (cs auth) of
+      ("Basic" : b64 : _) ->
+        case split (==':') (cs . decode . cs $ b64) of
+          (u:p:_) -> signInRole u p
+          _ -> return MalformedAuth
+      ("Bearer" : jwt : _) ->
+        return $ signInWithJWT jwtSecret jwt
+      _ -> return NoCredentials
+
+   runInRole :: Text -> Text -> H.Tx P.Postgres s Response
+   runInRole r uid = do
+     setUserId uid
+     setRole r
+     app r req
+
+
+redirectInsecure :: Application -> Application
+redirectInsecure app req respond = do
+  let hdrs = requestHeaders req
+      host = lookup "host" hdrs
+      uriM = parseURI . cs =<< mconcat [
+        Just "https://",
+        host,
+        Just $ rawPathInfo req,
+        Just $ rawQueryString req]
+      isHerokuSecure = lookup "x-forwarded-proto" hdrs == Just "https"
+
+  if not (isSecure req || isHerokuSecure)
+    then case uriM of
+      Just uri ->
+        respond $ responseLBS status301 [
+            (hLocation, cs . show $ uri { uriScheme = "https:" })
+          ] ""
+      Nothing ->
+        respond $ responseLBS status400 [] "SSL is required"
+    else app req respond
+
+unsupportedAccept :: Application -> Application
+unsupportedAccept app req respond = do
+  let
+    accept = lookup hAccept $ requestHeaders req
+  if isNothing $ contentTypeForAccept accept
+  then respond $ responseLBS status415 [] "Unsupported Accept header, try: application/json"
+  else app req respond
+
+defaultMiddle :: Bool -> Application -> Application
+defaultMiddle secure = (if secure then redirectInsecure else id)
+  . gzip def . cors corsPolicy
+  . staticPolicy (only [("favicon.ico", "static/favicon.ico")])
+  . unsupportedAccept

src/PostgREST/Parsers.hs

@@ -0,0 +1,159 @@
+module PostgREST.Parsers
+( parseGetRequest
+)
+where
+
+import           Control.Applicative hiding ((<$>))
+--lines needed for ghc 7.8
+import           Data.Functor ((<$>))
+import           Data.Traversable (traverse)
+
+import           Control.Monad                 (join)
+import           Data.List                     (delete, find)
+import           Data.Maybe
+import           Data.Monoid
+import           Data.String.Conversions       (cs)
+import           Data.Text                     (Text)
+import           Data.Tree
+import           Network.Wai                   (Request, pathInfo, queryString)
+import           PostgREST.Types
+import           Text.ParserCombinators.Parsec hiding (many, (<|>))
+parseGetRequest :: Request -> Either ParseError ApiRequest
+parseGetRequest httpRequest =
+  foldr addFilter <$> (addOrder <$> apiRequest <*> ord) <*> flts
+  where
+    apiRequest = parse (pRequestSelect rootTableName) ("failed to parse select parameter <<"++selectStr++">>") $ cs selectStr
+    addOrder (Node r f) o = Node r{order=o} f
+    flts = mapM pRequestFilter whereFilters
+    rootTableName = cs $ head $ pathInfo httpRequest -- TODO unsafe head
+    qString = [(cs k, cs <$> v)|(k,v) <- queryString httpRequest]
+    orderStr = join $ lookup "order" qString
+    ord = traverse (parse pOrder ("failed to parse order parameter <<"++fromMaybe "" orderStr++">>")) orderStr
+    selectStr = fromMaybe "*" $ fromMaybe (Just "*") $ lookup "select" qString --in case the parametre is missing or empty we default to *
+    whereFilters = [ (k, fromJust v) | (k,v) <- qString, k `notElem` ["select", "order"], isJust v ]
+
+pRequestSelect :: Text -> Parser ApiRequest
+pRequestSelect rootNodeName = do
+  fieldTree <- pFieldForest
+  return $ foldr treeEntry (Node (Select rootNodeName [] [] [] Nothing Nothing) []) fieldTree
+  where
+    treeEntry :: Tree SelectItem -> ApiRequest -> ApiRequest
+    treeEntry (Node fld@((fn, _),_) fldForest) (Node rNode rForest) =
+      case fldForest of
+        [] -> Node (rNode {fields=fld:fields rNode}) rForest
+        _  -> Node rNode (foldr treeEntry (Node (Select fn [] [] [] Nothing Nothing) []) fldForest:rForest)
+
+pRequestFilter :: (String, String) -> Either ParseError (Path, Filter)
+pRequestFilter (k, v) = (,) <$> path <*> (Filter <$> fld <*> op <*> val)
+  where
+    treePath = parse pTreePath ("failed to parser tree path (" ++ k ++ ")") k
+    opVal = parse pOpValueExp ("failed to parse filter (" ++ v ++ ")") v
+    path = fst <$> treePath
+    fld = snd <$> treePath
+    op = fst <$> opVal
+    val = snd <$> opVal
+
+addFilter :: (Path, Filter) -> ApiRequest -> ApiRequest
+addFilter ([], flt) (Node rn@(Select {filters=flts}) forest) = Node (rn {filters=flt:flts}) forest
+addFilter (path, flt) (Node rn forest) =
+  case targetNode of
+    Nothing -> Node rn forest -- the filter is silenty dropped in the Request does not contain the required path
+    Just tn -> Node rn (addFilter (remainingPath, flt) tn:restForest)
+  where
+    targetNodeName:remainingPath = path
+    (targetNode,restForest) = splitForest targetNodeName forest
+    splitForest name forst =
+      case maybeNode of
+        Nothing -> (Nothing,forest)
+        Just node -> (Just node, delete node forest)
+      where maybeNode = find ((name==).mainTable.rootLabel) forst
+
+ws :: Parser Text
+ws = cs <$> many (oneOf " \t")
+
+lexeme :: Parser a -> Parser a
+lexeme p = ws *> p <* ws
+
+pTreePath :: Parser (Path,Field)
+pTreePath = do
+  p <- pFieldName `sepBy1` pDelimiter
+  jp <- optionMaybe ( string "->" >>  pJsonPath)
+  let pp = map cs p
+      jpp = map cs <$> jp
+  return (init pp, (last pp, jpp))
+  where
+
+
+pFieldForest :: Parser [Tree SelectItem]
+pFieldForest = pFieldTree `sepBy1` lexeme (char ',')
+
+pFieldTree :: Parser (Tree SelectItem)
+pFieldTree = try (Node <$> pSelect <*> ( char '(' *> pFieldForest <* char ')'))
+      <|>    Node <$> pSelect <*> pure []
+
+pStar :: Parser Text
+pStar = cs <$> (string "*" *> pure ("*"::String))
+
+pFieldName :: Parser Text
+pFieldName =  cs <$> (many1 (letter <|> digit <|> oneOf "_")
+      <?> "field name (* or [a..z0..9_])")
+
+pJsonPathDelimiter :: Parser Text
+pJsonPathDelimiter = cs <$> (try (string "->>") <|> string "->")
+
+pJsonPath :: Parser [Text]
+pJsonPath = pFieldName `sepBy1` pJsonPathDelimiter
+
+pField :: Parser Field
+pField = lexeme $ (,) <$> pFieldName <*> optionMaybe ( pJsonPathDelimiter *>  pJsonPath)
+
+pSelect :: Parser SelectItem
+pSelect = lexeme $
+  try ((,) <$> pField <*>((cs <$>) <$> optionMaybe (string "::" *> many letter)) )
+  <|> do
+    s <- pStar
+    return ((s, Nothing), Nothing)
+
+pOperator :: Parser Operator
+pOperator = cs <$> ( try (string "lte") -- has to be before lt
+     <|> try (string "lt")
+     <|> try (string "eq")
+     <|> try (string "gte") -- has to be before gh
+     <|> try (string "gt")
+     <|> try (string "lt")
+     <|> try (string "neq")
+     <|> try (string "like")
+     <|> try (string "ilike")
+     <|> try (string "in")
+     <|> try (string "notin")
+     <|> try (string "is" )
+     <|> try (string "isnot")
+     <|> try (string "@@")
+     <?> "operator (eq, gt, ...)"
+     )
+
+pValue :: Parser FValue
+pValue = VText <$> (cs <$> many anyChar)
+
+pDelimiter :: Parser Char
+pDelimiter = char '.' <?> "delimiter (.)"
+
+pOperatiorWithNegation :: Parser Operator
+pOperatiorWithNegation = try ( (<>) <$> ( cs <$> string "not." ) <*>  pOperator) <|> pOperator
+
+pOpValueExp :: Parser (Operator, FValue)
+pOpValueExp = (,) <$> pOperatiorWithNegation <*> (pDelimiter *> pValue)
+
+pOrder :: Parser [OrderTerm]
+pOrder = lexeme pOrderTerm `sepBy` char ','
+
+pOrderTerm :: Parser OrderTerm
+pOrderTerm =
+  try ( do
+    c <- pFieldName
+    _ <- pDelimiter
+    d <- string "asc" <|> string "desc"
+    nls <- optionMaybe (pDelimiter *> ( try(string "nullslast" *> pure ("nulls last"::String)) <|> try(string "nullsfirst" *> pure ("nulls first"::String))))
+    return $ OrderTerm (cs c) (cs d) (cs <$> nls)
+  )
+  <|> OrderTerm <$> (cs <$> pFieldName) <*> pure "asc" <*> pure Nothing

src/PostgREST/PgQuery.hs

@@ -0,0 +1,306 @@
+{-# LANGUAGE FlexibleInstances    #-}
+{-# LANGUAGE MultiWayIf           #-}
+{-# LANGUAGE TypeSynonymInstances #-}
+{-# OPTIONS_GHC -fno-warn-orphans #-}
+
+module PostgREST.PgQuery where
+
+
+import qualified Hasql                   as H
+import qualified Hasql.Backend           as B
+import qualified Hasql.Postgres          as P
+import           PostgREST.RangeQuery
+import           PostgREST.Types         (OrderTerm (..), QualifiedIdentifier(..))
+
+import           Control.Monad           (join)
+import qualified Data.Aeson              as JSON
+import qualified Data.ByteString.Char8   as BS
+import           Data.Functor
+import qualified Data.HashMap.Strict     as H
+import qualified Data.List               as L
+import           Data.Maybe              (fromMaybe)
+import           Data.Monoid
+import           Data.Scientific         (FPFormat (..), formatScientific,
+                                          isInteger)
+import           Data.String.Conversions (cs)
+import qualified Data.Text               as T
+import           Data.Vector             (empty)
+import qualified Data.Vector             as V
+import qualified Network.HTTP.Types.URI  as Net
+import           Text.Regex.TDFA         ((=~))
+
+import           Prelude
+
+type PStmt = H.Stmt P.Postgres
+instance Monoid PStmt where
+  mappend (B.Stmt query params prep) (B.Stmt query' params' prep') =
+    B.Stmt (query <> query') (params <> params') (prep && prep')
+  mempty = B.Stmt "" empty True
+type StatementT = PStmt -> PStmt
+
+
+limitT :: Maybe NonnegRange -> StatementT
+limitT r q =
+  q <> B.Stmt (" LIMIT " <> limit <> " OFFSET " <> offset <> " ") empty True
+  where
+    limit  = maybe "ALL" (cs . show) $ join $ rangeLimit <$> r
+    offset = cs . show $ fromMaybe 0 $ rangeOffset <$> r
+
+whereT :: QualifiedIdentifier -> Net.Query -> StatementT
+whereT table params q =
+  if L.null cols
+    then q
+    else q <> B.Stmt " where " empty True <> conjunction
+  where
+    cols = [ col | col <- params, fst col `notElem` ["order","select"] ]
+    wherePredTable = wherePred table
+    conjunction = mconcat $ L.intersperse andq (map wherePredTable cols)
+
+withT :: PStmt -> T.Text -> StatementT
+withT (B.Stmt eq ep epre) v (B.Stmt wq wp wpre) =
+  B.Stmt ("WITH " <> v <> " AS (" <> eq <> ") " <> wq <> " from " <> v)
+    (ep <> wp)
+    (epre && wpre)
+
+orderT :: [OrderTerm] -> StatementT
+orderT ts q =
+  if L.null ts
+    then q
+    else q <> B.Stmt " order by " empty True <> clause
+  where
+    clause = mconcat $ L.intersperse commaq (map queryTerm ts)
+    queryTerm :: OrderTerm -> PStmt
+    queryTerm t = B.Stmt
+      (" " <> cs (pgFmtIdent $ otTerm t) <> " "
+           <> cs (otDirection t)         <> " "
+           <> maybe "" cs (otNullOrder t) <> " ")
+      empty True
+
+parentheticT :: StatementT
+parentheticT s =
+  s { B.stmtTemplate = " (" <> B.stmtTemplate s <> ") " }
+
+iffNotT :: PStmt -> StatementT
+iffNotT (B.Stmt aq ap apre) (B.Stmt bq bp bpre) =
+  B.Stmt
+    ("WITH aaa AS (" <> aq <> " returning *) " <>
+      bq <> " WHERE NOT EXISTS (SELECT * FROM aaa)")
+    (ap <> bp)
+    (apre && bpre)
+
+countT :: StatementT
+countT s =
+  s { B.stmtTemplate = "WITH qqq AS (" <> B.stmtTemplate s <> ") SELECT pg_catalog.count(1) FROM qqq" }
+
+countRows :: QualifiedIdentifier  -> PStmt
+countRows t = B.Stmt ("select pg_catalog.count(1) from " <> fromQi t) empty True
+
+countNone :: PStmt
+countNone = B.Stmt "select null" empty True
+
+asCsvWithCount :: QualifiedIdentifier -> StatementT
+asCsvWithCount table = withCount . asCsv table
+
+asCsv :: QualifiedIdentifier -> StatementT
+asCsv table s = s {
+  B.stmtTemplate =
+    "(select string_agg(quote_ident(column_name::text), ',') from "
+    <> "(select column_name from information_schema.columns where quote_ident(table_schema) || '.' || table_name = '"
+    <> fromQi table <> "' order by ordinal_position) h) || '\r' || "
+    <> "coalesce(string_agg(substring(t::text, 2, length(t::text) - 2), '\r'), '') from ("
+    <> B.stmtTemplate s <> ") t" }
+
+asJsonWithCount :: StatementT
+asJsonWithCount = withCount . asJson
+
+asJson :: StatementT
+asJson s = s {
+  B.stmtTemplate =
+    "array_to_json(array_agg(row_to_json(t)))::character varying from ("
+    <> B.stmtTemplate s <> ") t" }
+
+withCount :: StatementT
+withCount s = s { B.stmtTemplate = "pg_catalog.count(t), " <> B.stmtTemplate s }
+
+asJsonRow :: StatementT
+asJsonRow s = s { B.stmtTemplate = "row_to_json(t) from (" <> B.stmtTemplate s <> ") t" }
+
+returningStarT :: StatementT
+returningStarT s = s { B.stmtTemplate = B.stmtTemplate s <> " RETURNING *" }
+
+deleteFrom :: QualifiedIdentifier -> PStmt
+deleteFrom t = B.Stmt ("delete from " <> fromQi t) empty True
+
+insertInto :: QualifiedIdentifier
+              -> V.Vector T.Text
+              -> V.Vector (V.Vector JSON.Value)
+              -> PStmt
+insertInto t cols vals
+  | V.null cols = B.Stmt ("insert into " <> fromQi t <> " default values returning *") empty True
+  | otherwise   = B.Stmt
+    ("insert into " <> fromQi t <> " (" <>
+      T.intercalate ", " (V.toList $ V.map pgFmtIdent cols) <>
+      ") values "
+      <> T.intercalate ", "
+        (V.toList $ V.map (\v -> "("
+            <> T.intercalate ", " (V.toList $ V.map insertableValue v)
+            <> ")"
+          ) vals
+        )
+      <> " returning row_to_json(" <> fromQi t <> ".*)")
+    empty True
+
+insertSelect :: QualifiedIdentifier -> [T.Text] -> [JSON.Value] -> PStmt
+insertSelect t [] _ = B.Stmt
+  ("insert into " <> fromQi t <> " default values returning *") empty True
+insertSelect t cols vals = B.Stmt
+  ("insert into " <> fromQi t <> " ("
+    <> T.intercalate ", " (map pgFmtIdent cols)
+    <> ") select "
+    <> T.intercalate ", " (map insertableValue vals))
+  empty True
+
+update :: QualifiedIdentifier -> [T.Text] -> [JSON.Value] -> PStmt
+update t cols vals = B.Stmt
+  ("update " <> fromQi t <> " set ("
+    <> T.intercalate ", " (map pgFmtIdent cols)
+    <> ") = ("
+    <> T.intercalate ", " (map insertableValue vals)
+    <> ")")
+  empty True
+
+callProc :: QualifiedIdentifier -> JSON.Object -> PStmt
+callProc qi params = do
+  let args = T.intercalate "," $ map assignment (H.toList params)
+  B.Stmt ("select * from " <> fromQi qi <> "(" <> args <> ")") empty True
+  where
+    assignment (n,v) = pgFmtIdent n <> ":=" <> insertableValue v
+
+wherePred :: QualifiedIdentifier -> Net.QueryItem -> PStmt
+wherePred table (col, predicate) =
+  B.Stmt (notOp <> " " <> pgFmtJsonbPath table (cs col) <> " " <> op <> " " <>
+      if opCode `elem` ["is","isnot"] then whiteList value
+                                 else cs sqlValue)
+      empty True
+
+  where
+    headPredicate:rest = T.split (=='.') $ cs $ fromMaybe "." predicate
+    hasNot caseTrue caseFalse = if headPredicate == "not" then caseTrue else caseFalse
+    opCode        = hasNot (head rest) headPredicate
+    notOp         = hasNot headPredicate ""
+    value         = hasNot (T.intercalate "." $ tail rest) (T.intercalate "." rest)
+    sqlValue = pgFmtValue opCode value
+    op = pgFmtOperator opCode
+
+
+whiteList :: T.Text -> T.Text
+whiteList val = fromMaybe
+  (cs (pgFmtLit val) <> "::unknown ")
+  (L.find ((==) . T.toLower $ val) ["null","true","false"])
+
+pgFmtValue :: T.Text -> T.Text -> T.Text
+pgFmtValue opCode value =
+  case opCode of
+    "like" -> unknownLiteral $ T.map star value
+    "ilike" -> unknownLiteral $ T.map star value
+    "in" -> "(" <> T.intercalate ", " (map unknownLiteral $ T.split (==',') value) <> ") "
+    "notin" -> "(" <> T.intercalate ", " (map unknownLiteral $ T.split (==',') value) <> ") "
+    "@@" -> "to_tsquery(" <> unknownLiteral value <> ") "
+    _    -> unknownLiteral value
+  where
+    star c = if c == '*' then '%' else c
+    unknownLiteral = (<> "::unknown ") . pgFmtLit
+
+pgFmtOperator :: T.Text -> T.Text
+pgFmtOperator opCode =
+  case opCode of
+    "eq"  -> "="
+    "gt"  -> ">"
+    "lt"  -> "<"
+    "gte" -> ">="
+    "lte" -> "<="
+    "neq" -> "<>"
+    "like"-> "like"
+    "ilike"-> "ilike"
+    "in"  -> "in"
+    "notin" -> "not in"
+    "is"    -> "is"
+    "isnot" -> "is not"
+    "@@" -> "@@"
+    _     -> "="
+
+commaq :: PStmt
+commaq  = B.Stmt ", " empty True
+
+andq :: PStmt
+andq = B.Stmt " and " empty True
+
+data JsonbPath =
+    ColIdentifier T.Text
+  | KeyIdentifier T.Text
+  | SingleArrow JsonbPath JsonbPath
+  | DoubleArrow JsonbPath JsonbPath
+  deriving (Show)
+
+parseJsonbPath :: T.Text -> Maybe JsonbPath
+parseJsonbPath p =
+  case T.splitOn "->>" p of
+    [a,b] ->
+      let i:is = T.splitOn "->" a in
+      Just $ DoubleArrow
+        (foldl SingleArrow (ColIdentifier i) (map KeyIdentifier is))
+        (KeyIdentifier b)
+    _ -> Nothing
+
+pgFmtJsonbPath :: QualifiedIdentifier -> T.Text -> T.Text
+pgFmtJsonbPath table p =
+  pgFmtJsonbPath' $ fromMaybe (ColIdentifier p) (parseJsonbPath p)
+  where
+    pgFmtJsonbPath' (ColIdentifier i) = fromQi table <> "." <> pgFmtIdent i
+    pgFmtJsonbPath' (KeyIdentifier i) = pgFmtLit i
+    pgFmtJsonbPath' (SingleArrow a b) =
+      pgFmtJsonbPath' a <> "->" <> pgFmtJsonbPath' b
+    pgFmtJsonbPath' (DoubleArrow a b) =
+      pgFmtJsonbPath' a <> "->>" <> pgFmtJsonbPath' b
+
+pgFmtIdent :: T.Text -> T.Text
+pgFmtIdent x =
+  let escaped = T.replace "\"" "\"\"" (trimNullChars $ cs x) in
+  if (cs escaped :: BS.ByteString) =~ danger
+    then "\"" <> escaped <> "\""
+    else escaped
+
+  where danger = "^$|^[^a-z_]|[^a-z_0-9]" :: BS.ByteString
+
+pgFmtLit :: T.Text -> T.Text
+pgFmtLit x =
+  let trimmed = trimNullChars x
+      escaped = "'" <> T.replace "'" "''" trimmed <> "'"
+      slashed = T.replace "\\" "\\\\" escaped in
+  if T.isInfixOf "\\\\" escaped
+    then "E" <> slashed
+    else slashed
+
+trimNullChars :: T.Text -> T.Text
+trimNullChars = T.takeWhile (/= '\x0')
+
+fromQi :: QualifiedIdentifier -> T.Text
+fromQi t = pgFmtIdent (qiSchema t) <> "." <> pgFmtIdent (qiName t)
+
+unquoted :: JSON.Value -> T.Text
+unquoted (JSON.String t) = t
+unquoted (JSON.Number n) =
+  cs $ formatScientific Fixed (if isInteger n then Just 0 else Nothing) n
+unquoted (JSON.Bool b) = cs . show $ b
+unquoted v = cs $ JSON.encode v
+
+insertableText :: T.Text -> T.Text
+insertableText = (<> "::unknown") . pgFmtLit
+
+insertableValue :: JSON.Value -> T.Text
+insertableValue JSON.Null = "null"
+insertableValue v = insertableText $ unquoted v
+
+paramFilter :: JSON.Value -> T.Text
+paramFilter JSON.Null = "is.null"
+paramFilter v = "eq." <> unquoted v

src/PostgREST/PgStructure.hs

@@ -0,0 +1,264 @@
+{-# LANGUAGE FlexibleContexts      #-}
+{-# LANGUAGE MultiParamTypeClasses #-}
+{-# LANGUAGE QuasiQuotes           #-}
+{-# LANGUAGE ScopedTypeVariables   #-}
+{-# LANGUAGE TypeSynonymInstances  #-}
+module PostgREST.PgStructure where
+
+import           Control.Applicative
+import           Control.Monad         (join)
+import           Data.Functor.Identity
+import           Data.List             (elemIndex, find)
+import           Data.Maybe            (fromMaybe, isJust, mapMaybe)
+import           Data.Monoid
+import           Data.Text             (Text, split)
+import qualified Hasql                 as H
+import qualified Hasql.Postgres        as P
+import           PostgREST.PgQuery     ()
+import           PostgREST.Types
+
+import           GHC.Exts              (groupWith)
+import           Prelude
+
+
+doesProcExist :: Text -> Text -> H.Tx P.Postgres s Bool
+doesProcExist schema proc = do
+  row :: Maybe (Identity Int) <- H.maybeEx $ [H.stmt|
+      SELECT 1
+      FROM   pg_catalog.pg_namespace n
+      JOIN   pg_catalog.pg_proc p
+      ON     pronamespace = n.oid
+      WHERE  nspname = ?
+      AND    proname = ?
+    |] schema proc
+  return $ isJust row
+
+
+tableFromRow :: (Text, Text, Bool, Maybe Text) -> Table
+tableFromRow (s, n, i, a) = Table s n i (parseAcl a)
+  where
+    parseAcl :: Maybe Text -> [Text]
+    parseAcl str = fromMaybe [] $ split (==',') <$> str
+
+columnFromRow :: (Text,       Text,      Text,
+                  Int,        Bool,      Text,
+                  Bool,       Maybe Int, Maybe Int,
+                  Maybe Text, Maybe Text)
+              -> Column
+columnFromRow (s, t, n, pos, nul, typ, u, l, p, d, e) =
+  Column s t n pos nul typ u l p d (parseEnum e) Nothing
+
+  where
+    parseEnum :: Maybe Text -> [Text]
+    parseEnum str = fromMaybe [] $ split (==',') <$> str
+
+
+relationFromRow :: (Text, Text, [Text], Text, [Text]) -> Relation
+relationFromRow (s, t, cs, ft, fcs) = Relation s t cs ft fcs Child Nothing Nothing Nothing
+
+pkFromRow :: (Text, Text, Text) -> PrimaryKey
+pkFromRow (s, t, n) = PrimaryKey s t n
+
+
+addParentRelation :: Relation -> [Relation] -> [Relation]
+addParentRelation rel@(Relation s t c ft fc _ _ _ _) rels = Relation s ft fc t c Parent Nothing Nothing Nothing:rel:rels
+
+allTables :: H.Tx P.Postgres s [Table]
+allTables = do
+    rows <- H.listEx $ [H.stmt|
+      SELECT
+        n.nspname AS table_schema,
+        c.relname AS table_name,
+        c.relkind = 'r' OR (c.relkind IN ('v','f'))
+        AND (pg_relation_is_updatable(c.oid::regclass, FALSE) & 8) = 8
+        OR (EXISTS
+          ( SELECT 1
+            FROM pg_trigger
+            WHERE pg_trigger.tgrelid = c.oid
+            AND (pg_trigger.tgtype::integer & 69) = 69) ) AS insertable,
+        array_to_string(array_agg(r.rolname), ',') AS acl
+      FROM pg_class c
+      CROSS JOIN pg_roles r
+      JOIN pg_namespace n ON n.oid = c.relnamespace
+      WHERE c.relkind IN ('v','r','m')
+        AND n.nspname NOT IN ('pg_catalog', 'information_schema')
+        AND (
+          pg_has_role(r.rolname, c.relowner, 'USAGE'::text) OR
+          has_table_privilege(r.rolname, c.oid, 'SELECT, INSERT, UPDATE, DELETE, TRUNCATE, REFERENCES, TRIGGER'::text) OR
+          has_any_column_privilege(r.rolname, c.oid, 'SELECT, INSERT, UPDATE, REFERENCES'::text) )
+
+      GROUP BY table_schema, table_name, insertable
+      ORDER BY table_schema, table_name
+    |]
+    return $ map tableFromRow rows
+
+allRelations :: H.Tx P.Postgres s [Relation]
+allRelations = do
+  rels <- H.listEx $ [H.stmt|
+    WITH table_fk AS (
+        SELECT ns.nspname AS table_schema,
+               tab.relname AS table_name,
+               column_info.cols AS columns,
+               other.relname AS foreign_table_name,
+               column_info.refs AS foreign_columns
+        FROM pg_constraint,
+           LATERAL (SELECT array_agg(cols.attname) AS cols,
+                           array_agg(cols.attnum)  AS nums,
+                           array_agg(refs.attname) AS refs
+                      FROM ( SELECT unnest(conkey) AS col, unnest(confkey) AS ref) k,
+                           LATERAL (SELECT * FROM pg_attribute
+                                     WHERE attrelid = conrelid AND attnum = col)
+                                AS cols,
+                           LATERAL (SELECT * FROM pg_attribute
+                                     WHERE attrelid = confrelid AND attnum = ref)
+                                AS refs)
+                AS column_info,
+           LATERAL (SELECT * FROM pg_namespace
+                            WHERE pg_namespace.oid = connamespace) AS ns,
+           LATERAL (SELECT * FROM pg_class WHERE pg_class.oid = conrelid) AS tab,
+           LATERAL (SELECT * FROM pg_class WHERE pg_class.oid = confrelid) AS other
+        WHERE confrelid != 0
+        ORDER BY (conrelid, column_info.nums)
+    )
+
+    SELECT * FROM table_fk
+    UNION
+    (
+        SELECT
+            vcu.table_schema,
+            vcu.view_name AS table_name,
+            array_agg(vcu.column_name::text) AS columns,
+            table_fk.foreign_table_name,
+            table_fk.foreign_columns
+        FROM information_schema.view_column_usage as vcu
+        JOIN table_fk ON
+            table_fk.table_schema = vcu.view_schema AND
+            table_fk.table_name = vcu.table_name AND
+            vcu.column_name = ANY (table_fk.columns)
+        WHERE vcu.view_schema NOT IN ('pg_catalog', 'information_schema')
+        AND columns = table_fk.columns
+        GROUP BY vcu.table_schema, vcu.view_name, table_fk.foreign_table_name, table_fk.foreign_columns
+    )
+    UNION
+    (
+        SELECT
+            vcu.view_schema as table_schema,
+            table_fk.table_name,
+            table_fk.columns,
+            vcu.view_name as foreign_table_name,
+            array_agg(vcu.column_name::text) as foreign_columns
+        FROM information_schema.view_column_usage as vcu
+        JOIN table_fk ON
+            table_fk.table_schema = vcu.view_schema AND
+            table_fk.foreign_table_name = vcu.table_name AND
+            vcu.column_name = ANY (table_fk.foreign_columns)
+        WHERE vcu.view_schema NOT IN ('pg_catalog', 'information_schema')
+            AND foreign_columns = table_fk.foreign_columns
+        GROUP BY vcu.view_schema, table_fk.table_name, vcu.view_name, table_fk.columns
+    )
+  |]
+  let simpleRelations = foldr (addParentRelation.relationFromRow) [] rels
+  let links = filter ((==2).length) $ groupWith groupFn $ filter ( (==Child). relType) simpleRelations
+  return $ simpleRelations ++ mapMaybe link2Relation links
+  where
+    groupFn :: Relation -> Text
+    groupFn (Relation{relSchema=s, relTable=t}) = s<>"_"<>t
+    link2Relation [
+      Relation{relSchema=sc, relTable=lt, relColumns=lc1, relFTable=t, relFColumns=c},
+      Relation{                           relColumns=lc2, relFTable=ft, relFColumns=fc}
+      ] = Just $ Relation sc t c ft fc Many (Just lt) (Just lc1) (Just lc2)
+    link2Relation _ = Nothing
+
+allColumns :: [Relation] -> H.Tx P.Postgres s [Column]
+allColumns rels = do
+  cols <- H.listEx $ [H.stmt|
+      SELECT
+          info.table_schema AS schema,
+          info.table_name AS table_name,
+          info.column_name AS name,
+          info.ordinal_position AS position,
+          info.is_nullable::boolean AS nullable,
+          info.data_type AS col_type,
+          info.is_updatable::boolean AS updatable,
+          info.character_maximum_length AS max_len,
+          info.numeric_precision AS precision,
+          info.column_default AS default_value,
+          array_to_string(enum_info.vals, ',') AS enum
+      FROM (
+          SELECT
+              table_schema,
+              table_name,
+              column_name,
+              ordinal_position,
+              is_nullable,
+              data_type,
+              is_updatable,
+              character_maximum_length,
+              numeric_precision,
+              column_default,
+              udt_name
+          FROM information_schema.columns
+          WHERE table_schema NOT IN ('pg_catalog', 'information_schema')
+      ) AS info
+      LEFT OUTER JOIN (
+          SELECT
+              n.nspname AS s,
+              t.typname AS n,
+              array_agg(e.enumlabel ORDER BY e.enumsortorder) AS vals
+          FROM pg_type t
+          JOIN pg_enum e ON t.oid = e.enumtypid
+          JOIN pg_catalog.pg_namespace n ON n.oid = t.typnamespace
+          GROUP BY s,n
+      ) AS enum_info ON (info.udt_name = enum_info.n)
+      ORDER BY schema, position
+  |]
+  return $ map (addFK . columnFromRow) cols
+
+  where
+    addFK col = col { colFK = fk col }
+    fk col = join $ relToFk (colName col) <$> find (lookupFn col) rels
+    lookupFn :: Column -> Relation -> Bool
+    lookupFn (Column{colSchema=cs, colTable=ct, colName=cn})  (Relation{relSchema=rs, relTable=rt, relColumns=rc, relType=rty}) =
+      cs==rs && ct==rt && cn `elem` rc && rty==Child
+    lookupFn _ _ = False
+    relToFk cName (Relation{relFTable=t, relColumns=cs, relFColumns=fcs}) = ForeignKey t <$> c
+      where
+        pos = elemIndex cName cs
+        c = (fcs !!) <$> pos
+
+allPrimaryKeys :: H.Tx P.Postgres s [PrimaryKey]
+allPrimaryKeys = do
+  pks <- H.listEx $ [H.stmt|
+    WITH table_pk AS (
+        SELECT
+            kc.table_schema,
+            kc.table_name,
+            kc.column_name
+        FROM
+            information_schema.table_constraints tc,
+            information_schema.key_column_usage kc
+        WHERE
+            tc.constraint_type = 'PRIMARY KEY' AND
+            kc.table_name = tc.table_name AND
+            kc.table_schema = tc.table_schema AND
+            kc.constraint_name = tc.constraint_name AND
+            kc.table_schema NOT IN ('pg_catalog', 'information_schema')
+    )
+    SELECT table_schema,
+           table_name,
+           column_name
+    FROM table_pk
+    UNION (
+        SELECT
+            vcu.view_schema,
+            vcu.view_name,
+            vcu.column_name
+         FROM information_schema.view_column_usage AS vcu
+         JOIN
+            table_pk ON table_pk.table_schema = vcu.view_schema AND
+            table_pk.table_name = vcu.table_name AND
+            table_pk.column_name = vcu.column_name
+         WHERE vcu.view_schema NOT IN ('pg_catalog','information_schema')
+    )
+    |]
+  return $ map pkFromRow pks

src/PostgREST/QueryBuilder.hs

@@ -0,0 +1,165 @@
+module PostgREST.QueryBuilder
+where
+
+
+import           Control.Error
+import           Data.List         (find)
+import           Data.Monoid
+import           Data.Text         hiding (filter, find, foldr, head, last, map,
+                                    null, zipWith)
+import           Control.Applicative
+import           Data.Tree
+import           PostgREST.PgQuery (PStmt, fromQi,
+                                    orderT, pgFmtIdent, pgFmtLit, pgFmtOperator,
+                                    pgFmtValue, whiteList)
+import           PostgREST.Types
+import qualified Data.Vector       as V (empty)
+import qualified Hasql.Backend     as B
+
+findRelation :: [Relation] -> Text -> Text -> Text -> Maybe Relation
+findRelation allRelations s t1 t2 =
+  find (\r -> s == relSchema r && t1 == relTable r && t2 == relFTable r) allRelations
+
+addRelations :: Text -> [Relation] -> Maybe ApiRequest -> ApiRequest -> Either Text ApiRequest
+addRelations schema allRelations parentNode node@(Node query@(Select {mainTable=table}) forest) =
+  case parentNode of
+    Nothing -> Node query{relation=Nothing} <$> updatedForest
+    (Just (Node (Select{mainTable=parentTable}) _)) -> Node <$> (addRel query <$> rel) <*> updatedForest
+      where
+        rel = note ("no relation between " <> table <> " and " <> parentTable)
+            $  findRelation allRelations schema table parentTable
+           <|> findRelation allRelations schema parentTable table
+        addRel :: Query -> Relation -> Query
+        addRel q r = q{relation = Just r}
+  where
+    updatedForest = mapM (addRelations schema allRelations (Just node)) forest
+
+getJoinConditions :: Relation -> [Filter]
+getJoinConditions (Relation s t cs ft fcs typ lt lc1 lc2) =
+  case typ of
+    Child  -> zipWith (toFilter t ft) cs fcs
+    Parent -> zipWith (toFilter t ft) cs fcs
+    Many   -> zipWith (toFilter t (fromMaybe "" lt)) cs (fromMaybe [] lc1) ++ zipWith (toFilter ft (fromMaybe "" lt)) fcs (fromMaybe [] lc2)
+  where
+    toFilter :: Text -> Text -> FieldName -> FieldName -> Filter
+    toFilter tb ftb c fc = Filter (c, Nothing) "=" (VForeignKey (QualifiedIdentifier s tb) (ForeignKey ftb fc))
+
+addJoinConditions :: Text -> [Column] -> ApiRequest -> Either Text ApiRequest
+addJoinConditions schema allColumns (Node query@(Select{relation=r}) forest) =
+  case r of
+    Nothing -> Node updatedQuery  <$> updatedForest -- this is the root node
+    Just rel@(Relation{relType=Child}) -> Node (addCond updatedQuery (getJoinConditions rel)) <$> updatedForest
+    Just (Relation{relType=Parent}) -> Node updatedQuery <$> updatedForest
+    Just rel@(Relation{relType=Many, relLTable=(Just linkTable)}) ->
+      Node <$> pure qq <*> updatedForest
+      where
+         q = addCond updatedQuery (getJoinConditions rel)
+         qq = q{joinTables=linkTable:joinTables q}
+    _ -> Left "unknow relation"
+  where
+    -- add parentTable and parentJoinConditions to the query
+    updatedQuery = foldr (flip addCond) (query{joinTables = parentTables ++ joinTables query}) parentJoinConditions
+      where
+        parentJoinConditions = map (getJoinConditions.snd) parents
+        parentTables = map fst parents
+        parents = mapMaybe (getParents.rootLabel) forest
+        getParents qq@(Select{relation=(Just rel@(Relation{relType=Parent}))}) = Just (mainTable qq, rel)
+        getParents _ = Nothing
+    updatedForest = mapM (addJoinConditions schema allColumns) forest
+    addCond q con = q{filters=con ++ filters q}
+
+requestToCountQuery :: Text -> ApiRequest -> PStmt
+requestToCountQuery schema (Node (Select mainTbl _ _ conditions _ _) _) =
+  B.Stmt query V.empty True
+  where
+    query = Data.Text.unwords [
+      "SELECT pg_catalog.count(1)",
+      "FROM ", fromQi $ QualifiedIdentifier schema mainTbl,
+      ("WHERE " <> intercalate " AND " ( map (pgFmtCondition (QualifiedIdentifier schema mainTbl)) localConditions )) `emptyOnNull` localConditions
+      ]
+    emptyOnNull val x = if null x then "" else val
+    localConditions = filter fn conditions
+      where
+        fn  (Filter{value=VText _}) = True
+        fn  (Filter{value=VForeignKey _ _}) = False
+
+requestToQuery :: Text -> ApiRequest -> PStmt
+requestToQuery schema (Node (Select mainTbl colSelects tbls conditions ord _) forest) =
+  orderT (fromMaybe [] ord)  query
+  where
+    query = B.Stmt qStr V.empty True
+    qStr = Data.Text.unwords [
+      ("WITH " <> intercalate ", " withs) `emptyOnNull` withs,
+      "SELECT ", intercalate ", " (map (pgFmtSelectItem (QualifiedIdentifier schema mainTbl)) colSelects ++ selects),
+      "FROM ", intercalate ", " (map (fromQi . QualifiedIdentifier schema) (mainTbl:tbls)),
+      ("WHERE " <> intercalate " AND " ( map (pgFmtCondition (QualifiedIdentifier schema mainTbl) ) conditions )) `emptyOnNull` conditions
+      ]
+    emptyOnNull val x = if null x then "" else val
+    (withs, selects) = foldr getQueryParts ([],[]) forest
+    getQueryParts :: Tree Query -> ([Text], [Text]) -> ([Text], [Text])
+    getQueryParts (Node q@(Select{mainTable=table, relation=(Just (Relation {relType=Child}))}) forst) (w,s) = (w,sel:s)
+      where
+        sel = "("
+           <> "SELECT array_to_json(array_agg(row_to_json("<>table<>"))) "
+           <> "FROM (" <> subquery <> ") " <> table
+           <> ") AS " <> table
+           where (B.Stmt subquery _ _) = requestToQuery schema (Node q forst)
+
+    getQueryParts (Node q@(Select{mainTable=table, relation=(Just (Relation{relType=Parent}))}) forst) (w,s) = (wit:w,sel:s)
+      where
+        sel = "row_to_json(" <> table <> ".*) AS "<>table --TODO must be singular
+        wit = table <> " AS ( " <> subquery <> " )"
+          where (B.Stmt subquery _ _) = requestToQuery schema (Node q forst)
+
+    getQueryParts (Node q@(Select{mainTable=table, relation=(Just (Relation {relType=Many}))}) forst) (w,s) = (w,sel:s)
+      where
+        sel = "("
+           <> "SELECT array_to_json(array_agg(row_to_json("<>table<>"))) "
+           <> "FROM (" <> subquery <> ") " <> table
+           <> ") AS " <> table
+           where (B.Stmt subquery _ _) = requestToQuery schema (Node q forst)
+
+    -- the following is just to remove the warning
+    --getQueryParts is not total but requestToQuery is called only after addJoinConditions which ensures the only
+    --posible relations are Child Parent Many
+    getQueryParts (Node (Select{relation=Nothing}) _) _ = undefined
+
+pgFmtCondition :: QualifiedIdentifier -> Filter -> Text
+pgFmtCondition table (Filter (col,jp) ops val) =
+  notOp <> " " <> sqlCol  <> " " <> pgFmtOperator opCode <> " " <>
+    if opCode `elem` ["is","isnot"] then whiteList (getInner val) else sqlValue
+  where
+    headPredicate:rest = split (=='.') ops
+    hasNot caseTrue caseFalse = if headPredicate == "not" then caseTrue else caseFalse
+    opCode      = hasNot (head rest) headPredicate
+    notOp       = hasNot headPredicate ""
+    sqlCol = case val of
+      VText _ -> pgFmtColumn table col <> pgFmtJsonPath jp
+      VForeignKey qi _ -> pgFmtColumn qi col
+    sqlValue = valToStr val
+    getInner v = case v of
+      VText s -> s
+      _      -> ""
+    valToStr v = case v of
+      VText s -> pgFmtValue opCode s
+      VForeignKey (QualifiedIdentifier s _) (ForeignKey ft fc) -> pgFmtColumn (QualifiedIdentifier s ft) fc
+
+pgFmtColumn :: QualifiedIdentifier -> Text -> Text
+pgFmtColumn table "*" = fromQi table <> ".*"
+pgFmtColumn table c = fromQi table <> "." <> pgFmtIdent c
+
+pgFmtJsonPath :: Maybe JsonPath -> Text
+pgFmtJsonPath (Just [x]) = "->>" <> pgFmtLit x
+pgFmtJsonPath (Just (x:xs)) = "->" <> pgFmtLit x <> pgFmtJsonPath ( Just xs )
+pgFmtJsonPath _ = ""
+
+pgFmtTable :: Table -> Text
+pgFmtTable Table{tableSchema=s, tableName=n} = fromQi $ QualifiedIdentifier s n
+
+pgFmtSelectItem :: QualifiedIdentifier -> SelectItem -> Text
+pgFmtSelectItem table ((c, jp), Nothing) = pgFmtColumn table c <> pgFmtJsonPath jp <> asJsonPath jp
+pgFmtSelectItem table ((c, jp), Just cast ) = "CAST (" <> pgFmtColumn table c <> pgFmtJsonPath jp <> " AS " <> cast <> " )" <> asJsonPath jp
+
+asJsonPath :: Maybe JsonPath -> Text
+asJsonPath Nothing = ""
+asJsonPath (Just xx) = " AS " <> last xx

src/PostgREST/RangeQuery.hs

@@ -1,4 +1,4 @@
-module RangeQuery (
+module PostgREST.RangeQuery (
   rangeParse
 , rangeRequested
 , rangeLimit
@@ -6,19 +6,22 @@ module RangeQuery (
 , NonnegRange
 ) where
 
-import Control.Applicative
-import Network.HTTP.Types.Header
 
-import qualified Data.ByteString.Char8 as BS
+import           Control.Applicative
+import           Network.HTTP.Types.Header
+import           PostgREST.Types           ()
 
-import Data.Ranged.Boundaries
-import Data.Ranged.Ranges
+import qualified Data.ByteString.Char8     as BS
+import           Data.Ranged.Boundaries
+import           Data.Ranged.Ranges
 
-import Data.String.Conversions (cs)
-import Text.Regex.TDFA ((=~))
-import Text.Read (readMaybe)
+import           Data.String.Conversions   (cs)
+import           Text.Read                 (readMaybe)
+import           Text.Regex.TDFA           ((=~))
 
-import Data.Maybe (fromMaybe, listToMaybe)
+import           Data.Maybe                (fromMaybe, listToMaybe)
+
+import           Prelude
 
 type NonnegRange = Range Int
 
@@ -39,15 +42,15 @@ rangeRequested = (rangeParse =<<) . lookup hRange
 
 rangeLimit :: NonnegRange -> Maybe Int
 rangeLimit range =
-  case [rangeLower range, rangeUpper range]
-    of [BoundaryBelow from, BoundaryAbove to] -> Just (1 + to - from)
-       _ -> Nothing
+  case [rangeLower range, rangeUpper range] of
+    [BoundaryBelow from, BoundaryAbove to] -> Just (1 + to - from)
+    _ -> Nothing
 
 rangeOffset :: NonnegRange -> Int
 rangeOffset range =
-  case rangeLower range
-    of BoundaryBelow from -> from
-       _ -> error "range without lower bound" -- should never happen
+  case rangeLower range of
+    BoundaryBelow from -> from
+    _ -> error "range without lower bound" -- should never happen
 
 rangeGeq :: Int -> NonnegRange
 rangeGeq n =

src/PostgREST/Types.hs

@@ -0,0 +1,113 @@
+module PostgREST.Types where
+import Data.Text
+import Data.Tree
+import qualified Data.ByteString.Char8 as BS
+import Data.Aeson
+
+data DbStructure = DbStructure {
+  tables :: [Table]
+, columns :: [Column]
+, relations :: [Relation]
+, primaryKeys :: [PrimaryKey]
+}
+
+
+data Table = Table {
+  tableSchema :: Text
+, tableName :: Text
+, tableInsertable :: Bool
+, tableAcl :: [Text]
+} deriving (Show)
+
+data ForeignKey = ForeignKey {
+  fkTable::Text, fkCol::Text
+} deriving (Show, Eq)
+
+
+data Column = Column {
+  colSchema :: Text
+, colTable :: Text
+, colName :: Text
+, colPosition :: Int
+, colNullable :: Bool
+, colType :: Text
+, colUpdatable :: Bool
+, colMaxLen :: Maybe Int
+, colPrecision :: Maybe Int
+, colDefault :: Maybe Text
+, colEnum :: [Text]
+, colFK :: Maybe ForeignKey
+} | Star {colSchema :: Text, colTable :: Text } deriving (Show)
+
+data PrimaryKey = PrimaryKey {
+  pkSchema::Text, pkTable::Text, pkName::Text
+}
+
+data OrderTerm = OrderTerm {
+  otTerm :: Text
+, otDirection :: BS.ByteString
+, otNullOrder :: Maybe BS.ByteString
+} deriving (Show, Eq)
+
+data QualifiedIdentifier = QualifiedIdentifier {
+  qiSchema :: Text
+, qiName   :: Text
+} deriving (Show, Eq)
+
+
+data RelationType = Child | Parent | Many deriving (Show, Eq)
+data Relation = Relation {
+  relSchema  :: Text
+, relTable   :: Text
+, relColumns  :: [Text]
+, relFTable  :: Text
+, relFColumns :: [Text]
+, relType    :: RelationType
+, relLTable  :: Maybe Text
+, relLCols1   :: Maybe [Text]
+, relLCols2   :: Maybe [Text]
+} deriving (Show, Eq)
+
+
+type Operator = Text
+data FValue = VText Text | VForeignKey QualifiedIdentifier ForeignKey deriving (Show, Eq)
+type FieldName = Text
+type JsonPath = [Text]
+type Field = (FieldName, Maybe JsonPath)
+type Cast = Text
+type SelectItem = (Field, Maybe Cast)
+type Path = [Text]
+data Query = Select {
+  mainTable::Text
+, fields::[SelectItem]
+, joinTables::[Text]
+, filters::[Filter]
+, order::Maybe [OrderTerm]
+, relation::Maybe Relation
+} deriving (Show, Eq)
+data Filter = Filter {field::Field, operator::Operator, value::FValue} deriving (Show, Eq)
+type ApiRequest = Tree Query
+
+
+instance ToJSON Column where
+  toJSON c = object [
+      "schema"    .= colSchema c
+    , "name"      .= colName c
+    , "position"  .= colPosition c
+    , "nullable"  .= colNullable c
+    , "type"      .= colType c
+    , "updatable" .= colUpdatable c
+    , "maxLen"    .= colMaxLen c
+    , "precision" .= colPrecision c
+    , "references".= colFK c
+    , "default"   .= colDefault c
+    , "enum"      .= colEnum c ]
+
+instance ToJSON ForeignKey where
+  toJSON fk = object ["table".=fkTable fk, "column".=fkCol fk]
+
+instance ToJSON Table where
+  toJSON v = object [
+      "schema"     .= tableSchema v
+    , "name"       .= tableName v
+    , "insertable" .= tableInsertable v ]

src/Types.hs

@@ -1,57 +0,0 @@
-{-# OPTIONS_GHC -fno-warn-orphans #-}
-module Types where
-
-import qualified Data.Aeson as JSON
-import Data.Aeson.Types (Parser)
-
-import Data.Scientific (floatingOrInteger)
-import Data.HashMap.Strict (foldlWithKey')
-import Data.Text (Text)
-import Data.Text.Encoding (decodeUtf8)
-import Data.Time.Calendar (showGregorian)
-import Control.Monad (mzero)
-
-instance JSON.FromJSON SqlValue where
-  parseJSON (JSON.Number n)    = return $ either toSql iToSql (floatingOrInteger n :: Either Double Int)
-  parseJSON (JSON.String s)    = return $ toSql s
-  parseJSON (JSON.Bool   b)    = return $ toSql b
-  parseJSON JSON.Null          = return SqlNull
-  parseJSON (JSON.Object o)    = return . toSql $ JSON.encode o
-  parseJSON (JSON.Array  a)    = return . toSql $ JSON.encode a
-
-instance JSON.ToJSON SqlValue where
-  toJSON (SqlString s)         = JSON.toJSON s
-  toJSON (SqlByteString s)     = JSON.toJSON $ decodeUtf8 s
-  toJSON (SqlWord32 w)         = JSON.toJSON w
-  toJSON (SqlWord64 w)         = JSON.toJSON w
-  toJSON (SqlInt32 i)          = JSON.toJSON i
-  toJSON (SqlInt64 i)          = JSON.toJSON i
-  toJSON (SqlInteger i)        = JSON.toJSON i
-  toJSON (SqlChar c)           = JSON.toJSON c
-  toJSON (SqlBool b)           = JSON.toJSON b
-  toJSON (SqlDouble n)         = JSON.toJSON n
-  toJSON (SqlRational n)       = JSON.toJSON n
-  toJSON (SqlLocalDate d)      = JSON.toJSON $ showGregorian d
-  toJSON (SqlLocalTimeOfDay t) = JSON.toJSON $ show t
-  toJSON (SqlLocalTime t)      = JSON.toJSON $ show t
-  toJSON SqlNull               = JSON.Null
-  toJSON x                     = JSON.toJSON $ show x
-
-
-newtype SqlRow = SqlRow {getRow :: [(Text, SqlValue)] } deriving (Show)
-
-sqlRowColumns :: SqlRow -> [Text]
-sqlRowColumns = map fst . getRow
-
-sqlRowValues :: SqlRow -> [SqlValue]
-sqlRowValues = map snd . getRow
-
-instance JSON.FromJSON SqlRow where
-  parseJSON (JSON.Object m) = foldlWithKey' add (return $ SqlRow []) m
-    where
-      add :: Parser SqlRow -> Text -> JSON.Value -> Parser SqlRow
-      add parser k v = do
-        SqlRow l <- parser
-        sqlV <- JSON.parseJSON v
-        return . SqlRow $ (k, sqlV) : l
-  parseJSON _ = mzero

stack.yaml

@@ -0,0 +1,7 @@
+flags: {}
+packages:
+- '.'
+extra-deps: 
+  - Ranged-sets-0.3.0
+  - packdeps-0.4.1
+resolver: lts-3.10

test/Feature/AuthSpec.hs

@@ -1,4 +1,3 @@
-{-# LANGUAGE QuasiQuotes #-}
 module Feature.AuthSpec where
 
 -- {{{ Imports
@@ -11,16 +10,63 @@ import SpecHelper
 -- }}}
 
 spec :: Spec
-spec = before resetDb $ around withApp $
-  describe "authorization" $ do
-    it "hides tables that anonymous does not own" $
-      get "/authors_only" `shouldRespondWith` 404
-    it "indicates login failure" $ do
-      let auth = authHeader "postgrest_test_author" "fakefake"
-      request methodGet "/authors_only" [auth] ""
-        `shouldRespondWith` 401
-    it "allows users with permissions to see their tables" $ do
-      _ <- post "/postgrest/users" [json| { "id":"jdoe", "pass": "1234", "role": "postgrest_test_author" } |]
-      let auth = authHeader "jdoe" "1234"
-      request methodGet "/authors_only" [auth] ""
-        `shouldRespondWith` 200
+spec = beforeAll
+  (clearTable "postgrest.auth") . afterAll_ (clearTable "postgrest.auth")
+  $ around withApp
+  $ describe "authorization" $ do
+
+  it "hides tables that anonymous does not own" $
+    get "/authors_only" `shouldRespondWith` 404
+
+  it "indicates login failure (BasicAuth)" $ do
+    let auth = authHeaderBasic "postgrest_test_author" "fakefake"
+    request methodGet "/authors_only" [auth] ""
+      `shouldRespondWith` 401
+
+  it "allows users with permissions to see their tables (BasicAuth)" $ do
+    _ <- post "/postgrest/users" [json| { "id": "jdoe", "pass": "1234", "role": "postgrest_test_author" } |]
+    let auth = authHeaderBasic "jdoe" "1234"
+    request methodGet "/authors_only" [auth] ""
+      `shouldRespondWith` 200
+
+  it "respects database constraints for role" $
+    post "/postgrest/users" [json| { "id": "ssmith", "pass": "1234", "role": "SUPER_ADMIN_TRUNCATE_POWERS" } |]
+      `shouldRespondWith` 400
+
+  it "does not send a value when no role is provided" $ do
+    post "/postgrest/users" [json| { "id": "bdeey", "pass": "1234" } |]
+      `shouldRespondWith` 201
+    let auth = authHeaderBasic "jdoe" "1234"
+    request methodGet "/authors_only" [auth] ""
+      `shouldRespondWith` 200
+
+  it "recovers after 400 error with logged in user" $ do
+    _ <- post "/postgrest/users" [json| { "id": "jdoe", "pass": "1234", "role": "postgrest_test_author" } |]
+    let auth = authHeaderBasic "jdoe" "1234"
+    _ <- request methodPost "/rpc/problem" [auth] ""
+    request methodGet "/authors_only" [auth] ""
+      `shouldRespondWith` 200
+
+  it "allows users to login (JWT)" $ do
+    _ <- post "/postgrest/users" [json| { "id": "jdoe", "pass": "1234", "role": "postgrest_test_author" } |]
+    post "/postgrest/tokens" [json| { "id": "jdoe", "pass": "1234" } |]
+      `shouldRespondWith` ResponseMatcher {
+          matchBody = Just [json| {"token":"eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJyb2xlIjoicG9zdGdyZXN0X3Rlc3RfYXV0aG9yIiwiaWQiOiJqZG9lIn0.y4vZuu1dDdwAl0-S00MCRWRYMlJ5YAMSir6Es6WtWx0"} |]
+        , matchStatus = 201
+        , matchHeaders = ["Content-Type" <:> "application/json"]
+        }
+
+  it "indicates login failure (JWT)" $ do
+    _ <- post "/postgrest/users" [json| { "id": "jdoe", "pass": "1234", "role": "postgrest_test_author" } |]
+    post "/postgrest/tokens" [json| { "id": "jdoe", "pass": "NOPE" } |]
+      `shouldRespondWith` ResponseMatcher {
+          matchBody = Just [json| {"message":"Failed authentication."} |]
+        , matchStatus = 401
+        , matchHeaders = ["Content-Type" <:> "application/json"]
+        }
+
+  it "allows users with permissions to see their tables (JWT)" $ do
+    _ <- post "/postgrest/users" [json| { "id": "jdoe", "pass": "1234", "role": "postgrest_test_author" } |]
+    let auth = authHeaderJWT "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJyb2xlIjoicG9zdGdyZXN0X3Rlc3RfYXV0aG9yIiwiaWQiOiJqZG9lIn0.y4vZuu1dDdwAl0-S00MCRWRYMlJ5YAMSir6Es6WtWx0"
+    request methodGet "/authors_only" [auth] ""
+      `shouldRespondWith` 200

test/Feature/CorsSpec.hs

@@ -12,8 +12,7 @@ import Network.HTTP.Types
 -- }}}
 
 spec :: Spec
-spec = before resetDb $ around withApp $
-  describe "CORS" $ do
+spec = around withApp $ describe "CORS" $ do
     let preflightHeaders = [
           ("Accept", "*/*"),
           ("Origin", "http://example.com"),
@@ -23,7 +22,7 @@ spec = before resetDb $ around withApp $
           ("Host", "localhost:3000"),
           ("User-Agent", "Mozilla/5.0 (Macintosh; Intel Mac OS X 10.9; rv:32.0) Gecko/20100101 Firefox/32.0"),
           ("Origin", "http://localhost:8000"),
-          ("Accept", "text/plain, */*; q=0.01"),
+          ("Accept", "text/csv, */*; q=0.01"),
           ("Accept-Language", "en-US,en;q=0.5"),
           ("Accept-Encoding", "gzip, deflate"),
           ("Referer", "http://localhost:8000/"),
@@ -54,6 +53,14 @@ spec = before resetDb $ around withApp $
         r <- request methodOptions "/" preflightHeaders ""
         liftIO $ simpleBody r `shouldBe` ""
 
+    describe "regular request" $
+      it "exposes necesssary response headers" $ do
+        r <- request methodGet "/items" [("Origin", "http://example.com")] ""
+        liftIO $ simpleHeaders r `shouldSatisfy` matchHeader
+          "Access-Control-Expose-Headers"
+          "Content-Encoding, Content-Location, Content-Range, Content-Type, \
+            \Date, Location, Server, Transfer-Encoding, Range-Unit"
+
     describe "postflight request" $
       it "allows INFO body through even with CORS request headers present" $ do
         r <- request methodOptions "/items" normalCors ""

test/Feature/DeleteSpec.hs

@@ -0,0 +1,37 @@
+module Feature.DeleteSpec where
+
+import Test.Hspec
+import Test.Hspec.Wai
+import SpecHelper
+
+import Network.HTTP.Types
+
+spec :: Spec
+spec = beforeAll (clearTable "items" >> createItems 15) . afterAll_ (clearTable "items")
+  . around withApp $
+  describe "Deleting" $ do
+    context "existing record" $ do
+      it "succeeds with 204 and deletion count" $
+        request methodDelete "/items?id=eq.1" [] ""
+          `shouldRespondWith` ResponseMatcher {
+            matchBody    = Nothing
+          , matchStatus  = 204
+          , matchHeaders = ["Content-Range" <:> "*/1"]
+          }
+
+      it "actually clears items ouf the db" $ do
+        _ <- request methodDelete "/items?id=lt.15" [] ""
+        get "/items"
+          `shouldRespondWith` ResponseMatcher {
+            matchBody    = Just "[{\"id\":15}]"
+          , matchStatus  = 200
+          , matchHeaders = ["Content-Range" <:> "0-0/1"]
+          }
+
+    context "known route, unknown record" $
+      it "fails with 404" $
+        request methodDelete "/items?id=eq.101" [] "" `shouldRespondWith` 404
+
+    context "totally unknown route" $
+      it "fails with 404" $
+        request methodDelete "/foozle?id=eq.101" [] "" `shouldRespondWith` 404

test/Feature/InsertSpec.hs

@@ -1,4 +1,3 @@
-{-# LANGUAGE QuasiQuotes #-}
 module Feature.InsertSpec where
 
 import Test.Hspec
@@ -10,18 +9,17 @@ import SpecHelper
 
 import qualified Data.Aeson as JSON
 import Data.Maybe (fromJust)
+import Text.Heredoc
 import Network.HTTP.Types.Header
 import Network.HTTP.Types
 import Control.Monad (replicateM_)
 
 import TestTypes(IncPK(..), CompoundPK(..))
 
---import Debug.Trace
-
 spec :: Spec
-spec = before resetDb $ around withApp $ do
+spec = afterAll_ resetDb $ around withApp $ do
   describe "Posting new record" $ do
-    it "accepts disparate json types" $ do
+    after_ (clearTable "menagerie") . it "accepts disparate json types" $ do
       p <- post "/menagerie"
         [json| {
           "integer": 13, "double": 3.14159, "varchar": "testing!"
@@ -33,7 +31,7 @@ spec = before resetDb $ around withApp $ do
         simpleStatus p `shouldBe` created201
 
     context "with no pk supplied" $ do
-      context "into a table with auto-incrementing pk" $
+      context "into a table with auto-incrementing pk" . after_ (clearTable "auto_incrementing_pk") $
         it "succeeds with 201 and link" $ do
           p <- post "/auto_incrementing_pk" [json| { "non_nullable_string":"not null"} |]
           liftIO $ do
@@ -52,7 +50,7 @@ spec = before resetDb $ around withApp $ do
           post "/simple_pk" [json| { "extra":"foo"} |]
             `shouldRespondWith` 400
 
-      context "into a table with no pk" $
+      context "into a table with no pk" . after_ (clearTable "no_pk") $ do
         it "succeeds with 201 and a link including all fields" $ do
           p <- post "/no_pk" [json| { "a":"foo", "b":"bar" } |]
           liftIO $ do
@@ -60,7 +58,25 @@ spec = before resetDb $ around withApp $ do
             simpleHeaders p `shouldSatisfy` matchHeader hLocation "/no_pk\\?a=eq.foo&b=eq.bar"
             simpleStatus p `shouldBe` created201
 
-    context "with compound pk supplied" $
+        it "returns full details of inserted record if asked" $ do
+          p <- request methodPost "/no_pk"
+                       [("Prefer", "return=representation")]
+                       [json| { "a":"bar", "b":"baz" } |]
+          liftIO $ do
+            simpleBody p `shouldBe` [json| { "a":"bar", "b":"baz" } |]
+            simpleHeaders p `shouldSatisfy` matchHeader hLocation "/no_pk\\?a=eq.bar&b=eq.baz"
+            simpleStatus p `shouldBe` created201
+
+        it "can post nulls" $ do
+          p <- request methodPost "/no_pk"
+                       [("Prefer", "return=representation")]
+                       [json| { "a":null, "b":"foo" } |]
+          liftIO $ do
+            simpleBody p `shouldBe` [json| { "a":null, "b":"foo" } |]
+            simpleHeaders p `shouldSatisfy` matchHeader hLocation "/no_pk\\?a=is.null&b=eq.foo"
+            simpleStatus p `shouldBe` created201
+
+    context "with compound pk supplied" . after_ (clearTable "compound_pk") $
       it "builds response location header appropriately" $
         post "/compound_pk" [json| { "k1":12, "k2":42 } |]
           `shouldRespondWith` ResponseMatcher {
@@ -71,13 +87,68 @@ spec = before resetDb $ around withApp $ do
 
     context "with invalid json payload" $
       it "fails with 400 and error" $
-        post "/simple_pk" "}{ x = 2"
+        post "/simple_pk" "}{ x = 2" `shouldRespondWith` 400
+
+    context "jsonb" . after_ (clearTable "json") $ do
+      it "serializes nested object" $ do
+        let inserted = [json| { "data": { "foo":"bar" } } |]
+        p <- request methodPost "json" [("Prefer", "return=representation")] inserted
+        liftIO $ do
+          simpleBody p `shouldBe` inserted
+          simpleHeaders p `shouldSatisfy` matchHeader hLocation "/json\\?data=eq\\.%7B%22foo%22%3A%22bar%22%7D"
+          simpleStatus p `shouldBe` created201
+      it "serializes nested array" $ do
+        let inserted = [json| { "data": [1,2,3] } |]
+        p <- request methodPost "json" [("Prefer", "return=representation")] inserted
+        liftIO $ do
+          simpleBody p `shouldBe` inserted
+          simpleHeaders p `shouldSatisfy` matchHeader hLocation "/json\\?data=eq\\.%5B1%2C2%2C3%5D"
+          simpleStatus p `shouldBe` created201
+
+  describe "CSV insert" $ do
+
+    after_ (clearTable "menagerie") . context "disparate csv types" $
+      it "succeeds with multipart response" $ do
+        p <- request methodPost "/menagerie" [("Content-Type", "text/csv")]
+               [str|integer,double,varchar,boolean,date,money,enum
+                   |13,3.14159,testing!,false,1900-01-01,$3.99,foo
+                   |12,0.1,a string,true,1929-10-01,12,bar
+                   |]
+        liftIO $ do
+          simpleBody p `shouldBe` "Content-Type: application/json\nLocation: /menagerie?integer=eq.13\n\n\n--postgrest_boundary\nContent-Type: application/json\nLocation: /menagerie?integer=eq.12\n\n"
+          simpleStatus p `shouldBe` created201
+
+    after_ (clearTable "no_pk") . context "requesting full representation" $ do
+      it "returns full details of inserted record" $
+        request methodPost "/no_pk"
+                     [("Content-Type", "text/csv"), ("Prefer", "return=representation")]
+                     "a,b\nbar,baz"
           `shouldRespondWith` ResponseMatcher {
-            matchBody    = Just [json| {"message":"Failed to parse JSON payload. Failed reading: satisfy"} |]
-          , matchStatus  = 400
-          , matchHeaders = []
+            matchBody    = Just [json| { "a":"bar", "b":"baz" } |]
+          , matchStatus  = 201
+          , matchHeaders = ["Content-Type" <:> "application/json",
+                            "Location" <:> "/no_pk?a=eq.bar&b=eq.baz"]
           }
 
+      it "can post nulls" $
+        request methodPost "/no_pk"
+                     [("Content-Type", "text/csv"), ("Prefer", "return=representation")]
+                     "a,b\nNULL,foo"
+          `shouldRespondWith` ResponseMatcher {
+            matchBody    = Just [json| { "a":null, "b":"foo" } |]
+          , matchStatus  = 201
+          , matchHeaders = ["Content-Type" <:> "application/json",
+                            "Location" <:> "/no_pk?a=is.null&b=eq.foo"]
+          }
+
+    after_ (clearTable "no_pk") . context "with wrong number of columns" $ do
+      it "fails for too few" $ do
+        p <- request methodPost "/no_pk" [("Content-Type", "text/csv")] "a,b\nfoo,bar\nbaz"
+        liftIO $ simpleStatus p `shouldBe` badRequest400
+      it "fails for too many" $ do
+        p <- request methodPost "/no_pk" [("Content-Type", "text/csv")] "a,b\nfoo,bar\nbaz,bat,bad"
+        liftIO $ simpleStatus p `shouldBe` badRequest400
+
   describe "Putting record" $ do
 
     context "to unkonwn uri" $
@@ -101,7 +172,7 @@ spec = before resetDb $ around withApp $ do
               [json| { "k1":12, "k2":42 } |]
                 `shouldRespondWith` 400
 
-        context "specifying every column in the table" $ do
+        context "specifying every column in the table" . after_ (clearTable "compound_pk") $ do
           it "can create a new record" $ do
             p <- request methodPut "/compound_pk?k1=eq.12&k2=eq.42" []
                  [json| { "k1":12, "k2":42, "extra":3 } |]
@@ -131,7 +202,7 @@ spec = before resetDb $ around withApp $ do
               let record = head rows
               compoundExtra record `shouldBe` Just 5
 
-      context "with an auto-incrementing primary key" $
+      context "with an auto-incrementing primary key" . after_ (clearTable "auto_incrementing_pk") $
 
         it "succeeds with 204" $
           request methodPut "/auto_incrementing_pk?id=eq.1" []
@@ -156,19 +227,24 @@ spec = before resetDb $ around withApp $ do
             `shouldRespondWith` 404
 
     context "on an empty table" $
-      it "succeeds with no effect" $
+      it "indicates no records found to update" $
         request methodPatch "/simple_pk" []
           [json| { "extra":20 } |]
-            `shouldRespondWith` 204
+            `shouldRespondWith` 404
 
-    context "in a nonempty table" $ do
+    context "in a nonempty table" . before_ (clearTable "items" >> createItems 15) .
+      after_ (clearTable "items") $ do
       it "can update a single item" $ do
         g <- get "/items?id=eq.42"
         liftIO $ simpleHeaders g
           `shouldSatisfy` matchHeader "Content-Range" "\\*/0"
         request methodPatch "/items?id=eq.1" []
           [json| { "id":42 } |]
-            `shouldRespondWith` 204
+            `shouldRespondWith` ResponseMatcher {
+              matchBody    = Nothing,
+              matchStatus  = 204,
+              matchHeaders = ["Content-Range" <:> "0-0/1"]
+            }
         g' <- get "/items?id=eq.42"
         liftIO $ simpleHeaders g'
           `shouldSatisfy` matchHeader "Content-Range" "0-0/1"
@@ -184,3 +260,44 @@ spec = before resetDb $ around withApp $ do
         g <- get "/auto_incrementing_pk?non_nullable_string=eq.c"
         liftIO $ simpleHeaders g
           `shouldSatisfy` matchHeader "Content-Range" "0-9/10"
+
+      it "can set a column to NULL" $ do
+        _ <- post "/no_pk" [json| { a: "keepme", b: "nullme" } |]
+        _ <- request methodPatch "/no_pk?b=eq.nullme" [] [json| { b: null } |]
+        get "/no_pk?a=eq.keepme" `shouldRespondWith`
+          [json| [{ a: "keepme", b: null }] |]
+
+      it "can update based on a computed column" $
+        request methodPatch
+          "/items?always_true=eq.false"
+          [("Prefer", "return=representation")]
+          [json| { id: 100 } |]
+          `shouldRespondWith` 404
+      it "can provide a representation" $ do
+        _ <- post "/items"
+          [json| { id: 1 } |]
+        request methodPatch
+          "/items?id=eq.1"
+          [("Prefer", "return=representation")]
+          [json| { id: 99 } |]
+          `shouldRespondWith` [json| [{id:99}] |]
+
+  describe "Row level permission" $
+    it "set user_id when inserting rows" $ do
+      _ <- post "/postgrest/users" [json| { "id":"jdoe", "pass": "1234", "role": "postgrest_test_author" } |]
+      _ <- post "/postgrest/users" [json| { "id":"jroe", "pass": "1234", "role": "postgrest_test_author" } |]
+
+      p1 <- request methodPost "/authors_only"
+        [ authHeaderBasic "jdoe" "1234", ("Prefer", "return=representation") ]
+        [json| { "secret": "nyancat" } |]
+      liftIO $ do
+          simpleBody p1 `shouldBe` [json| { "owner":"jdoe", "secret":"nyancat" } |]
+          simpleStatus p1 `shouldBe` created201
+
+      p2 <- request methodPost "/authors_only"
+        -- jwt token for jroe
+        [ authHeaderJWT "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJyb2xlIjoicG9zdGdyZXN0X3Rlc3RfYXV0aG9yIiwiaWQiOiJqcm9lIn0.YuF_VfmyIxWyuceT7crnNKEprIYXsJAyXid3rjPjIow", ("Prefer", "return=representation") ]
+        [json| { "secret": "lolcat", "owner": "hacker" } |]
+      liftIO $ do
+          simpleBody p2 `shouldBe` [json| { "owner":"jroe", "secret":"lolcat" } |]
+          simpleStatus p2 `shouldBe` created201

test/Feature/QuerySpec.hs

@@ -1,43 +1,282 @@
 module Feature.QuerySpec where
 
-import Test.Hspec
+import Test.Hspec hiding (pendingWith)
 import Test.Hspec.Wai
+import Test.Hspec.Wai.JSON
+import Network.HTTP.Types
+import Network.Wai.Test (SResponse(simpleHeaders))
 
 import SpecHelper
 
 spec :: Spec
-spec = before resetDb $ around withApp $ do
+spec =
+  beforeAll (clearTable "items" >> createItems 15)
+   . beforeAll (clearTable "complex_items" >> createComplexItems)
+   . beforeAll (clearTable "nullable_integer" >> createNullInteger)
+   . beforeAll (
+       clearTable "no_pk" >>
+       createNulls 2 >>
+       createLikableStrings >>
+       createJsonData)
+   . afterAll_ (clearTable "items" >> clearTable "complex_items" >> clearTable "no_pk" >> clearTable "simple_pk")
+   . around withApp $ do
+
+  describe "Querying a table with a column called count" $
+    it "should not confuse count column with pg_catalog.count aggregate" $
+      get "/has_count_column" `shouldRespondWith` 200
+
   describe "Querying a nonexistent table" $
     it "causes a 404" $
       get "/faketable" `shouldRespondWith` 404
 
-  describe "Filtering response" $
-    context "column equality" $
+  describe "Filtering response" $ do
+    it "matches with equality" $
+      get "/items?id=eq.5"
+        `shouldRespondWith` ResponseMatcher {
+          matchBody    = Just [json| [{"id":5}] |]
+        , matchStatus  = 200
+        , matchHeaders = ["Content-Range" <:> "0-0/1"]
+        }
+
+    it "matches with equality using not operator" $
+      get "/items?id=not.eq.5"
+        `shouldRespondWith` ResponseMatcher {
+          matchBody    = Just [json| [{"id":1},{"id":2},{"id":3},{"id":4},{"id":6},{"id":7},{"id":8},{"id":9},{"id":10},{"id":11},{"id":12},{"id":13},{"id":14},{"id":15}] |]
+        , matchStatus  = 200
+        , matchHeaders = ["Content-Range" <:> "0-13/14"]
+        }
+
+    it "matches with more than one condition using not operator" $
+      get "/simple_pk?k=like.*yx&extra=not.eq.u" `shouldRespondWith` "[]"
+
+    it "matches with inequality using not operator" $ do
+      get "/items?id=not.lt.14&order=id.asc"
+        `shouldRespondWith` ResponseMatcher {
+          matchBody    = Just [json| [{"id":14},{"id":15}] |]
+        , matchStatus  = 200
+        , matchHeaders = ["Content-Range" <:> "0-1/2"]
+        }
+      get "/items?id=not.gt.2&order=id.asc"
+        `shouldRespondWith` ResponseMatcher {
+          matchBody    = Just [json| [{"id":1},{"id":2}] |]
+        , matchStatus  = 200
+        , matchHeaders = ["Content-Range" <:> "0-1/2"]
+        }
+
+    it "matches items IN" $
+      get "/items?id=in.1,3,5"
+        `shouldRespondWith` ResponseMatcher {
+          matchBody    = Just [json| [{"id":1},{"id":3},{"id":5}] |]
+        , matchStatus  = 200
+        , matchHeaders = ["Content-Range" <:> "0-2/3"]
+        }
+
+    it "matches items NOT IN" $
+      get "/items?id=notin.2,4,6,7,8,9,10,11,12,13,14,15"
+        `shouldRespondWith` ResponseMatcher {
+          matchBody    = Just [json| [{"id":1},{"id":3},{"id":5}] |]
+        , matchStatus  = 200
+        , matchHeaders = ["Content-Range" <:> "0-2/3"]
+        }
+
+    it "matches items NOT IN using not operator" $
+      get "/items?id=not.in.2,4,6,7,8,9,10,11,12,13,14,15"
+        `shouldRespondWith` ResponseMatcher {
+          matchBody    = Just [json| [{"id":1},{"id":3},{"id":5}] |]
+        , matchStatus  = 200
+        , matchHeaders = ["Content-Range" <:> "0-2/3"]
+        }
+
+    it "matches nulls using not operator" $
+      get "/no_pk?a=not.is.null" `shouldRespondWith`
+        [json| [{"a":"1","b":"0"},{"a":"2","b":"0"}] |]
+
+    it "matches nulls in varchar and numeric fields alike" $ do
+      get "/no_pk?a=is.null" `shouldRespondWith`
+        [json| [{"a": null, "b": null}] |]
+
+      get "/nullable_integer?a=is.null" `shouldRespondWith` "[{\"a\":null}]"
+
+    it "matches with like" $ do
+      get "/simple_pk?k=like.*yx" `shouldRespondWith`
+        "[{\"k\":\"xyyx\",\"extra\":\"u\"}]"
+      get "/simple_pk?k=like.xy*" `shouldRespondWith`
+        "[{\"k\":\"xyyx\",\"extra\":\"u\"}]"
+      get "/simple_pk?k=like.*YY*" `shouldRespondWith`
+        "[{\"k\":\"xYYx\",\"extra\":\"v\"}]"
+
+    it "matches with like using not operator" $
+      get "/simple_pk?k=not.like.*yx" `shouldRespondWith`
+        "[{\"k\":\"xYYx\",\"extra\":\"v\"}]"
+
+    it "matches with ilike" $ do
+      get "/simple_pk?k=ilike.xy*&order=extra.asc" `shouldRespondWith`
+        "[{\"k\":\"xyyx\",\"extra\":\"u\"},{\"k\":\"xYYx\",\"extra\":\"v\"}]"
+      get "/simple_pk?k=ilike.*YY*&order=extra.asc" `shouldRespondWith`
+        "[{\"k\":\"xyyx\",\"extra\":\"u\"},{\"k\":\"xYYx\",\"extra\":\"v\"}]"
+
+    it "matches with ilike using not operator" $
+      get "/simple_pk?k=not.ilike.xy*&order=extra.asc" `shouldRespondWith` "[]"
+
+    it "matches with tsearch @@" $
+      get "/tsearch?text_search_vector=@@.foo" `shouldRespondWith`
+        [json| [{"text_search_vector":"'bar':2 'foo':1"}] |]
+
+    it "matches with tsearch @@ using not operator" $
+      get "/tsearch?text_search_vector=not.@@.foo" `shouldRespondWith`
+        [json| [{"text_search_vector":"'baz':1 'qux':2"}] |]
+
+    it "matches with computed column" $
+      get "/items?always_true=eq.true" `shouldRespondWith`
+        [json| [{"id":1},{"id":2},{"id":3},{"id":4},{"id":5},{"id":6},{"id":7},{"id":8},{"id":9},{"id":10},{"id":11},{"id":12},{"id":13},{"id":14},{"id":15}] |]
+
+    it "matches filtering nested items" $
+      get "/clients?select=id,projects(id,tasks(id,name))&projects.tasks.name=like.Design*" `shouldRespondWith`
+        "[{\"id\":1,\"projects\":[{\"id\":1,\"tasks\":[{\"id\":1,\"name\":\"Design w7\"}]},{\"id\":2,\"tasks\":[{\"id\":3,\"name\":\"Design w10\"}]}]},{\"id\":2,\"projects\":[{\"id\":3,\"tasks\":[{\"id\":5,\"name\":\"Design IOS\"}]},{\"id\":4,\"tasks\":[{\"id\":7,\"name\":\"Design OSX\"}]}]}]"
+
+  describe "Shaping response with select parameter" $ do
+
+    it "selectStar works in absense of parameter" $
+      get "/complex_items?id=eq.3" `shouldRespondWith`
+        "[{\"id\":3,\"name\":\"Three\",\"settings\":{\"foo\":{\"int\":1,\"bar\":\"baz\"}}}]"
+
+    it "one simple column" $
+      get "/complex_items?select=id" `shouldRespondWith`
+        [json| [{"id":1},{"id":2},{"id":3}] |]
+
+    it "one simple column with casting (text)" $
+      get "/complex_items?select=id::text" `shouldRespondWith`
+        [json| [{"id":"1"},{"id":"2"},{"id":"3"}] |]
+
+    it "json column" $
+      get "/complex_items?id=eq.1&select=settings" `shouldRespondWith`
+        [json| [{"settings":{"foo":{"int":1,"bar":"baz"}}}] |]
+
+    it "json subfield one level with casting (json)" $
+      get "/complex_items?id=eq.1&select=settings->>foo::json" `shouldRespondWith`
+        [json| [{"foo":{"int":1,"bar":"baz"}}] |] -- the value of foo here is of type "text"
+
+    it "fails on bad casting (data of the wrong format)" $
+      get "/complex_items?select=settings->foo->>bar::integer"
+        `shouldRespondWith` ResponseMatcher {
+          matchBody    = Just [json| {"hint":null,"details":null,"code":"22P02","message":"invalid input syntax for integer: \"baz\""} |]
+        , matchStatus  = 400
+        , matchHeaders = []
+        }
+
+    it "fails on bad casting (wrong cast type)" $
+      get "/complex_items?select=id::fakecolumntype"
+        `shouldRespondWith` ResponseMatcher {
+          matchBody    = Just [json| {"hint":null,"details":null,"code":"42704","message":"type \"fakecolumntype\" does not exist"} |]
+        , matchStatus  = 400
+        , matchHeaders = []
+        }
+
+
+    it "json subfield two levels (string)" $
+      get "/complex_items?id=eq.1&select=settings->foo->>bar" `shouldRespondWith`
+        [json| [{"bar":"baz"}] |]
+
+
+    it "json subfield two levels with casting (int)" $
+      get "/complex_items?id=eq.1&select=settings->foo->>int::integer" `shouldRespondWith`
+        [json| [{"int":1}] |] -- the value in the db is an int, but here we expect a string for now
+
+    it "requesting parents and children" $
+      get "/projects?id=eq.1&select=id, name, clients(*), tasks(id, name)" `shouldRespondWith`
+        "[{\"id\":1,\"name\":\"Windows 7\",\"clients\":{\"id\":1,\"name\":\"Microsoft\"},\"tasks\":[{\"id\":1,\"name\":\"Design w7\"},{\"id\":2,\"name\":\"Code w7\"}]}]"
+
+    it "requesting children 2 levels" $
+      get "/clients?id=eq.1&select=id,projects(id,tasks(id))" `shouldRespondWith`
+        "[{\"id\":1,\"projects\":[{\"id\":1,\"tasks\":[{\"id\":1},{\"id\":2}]},{\"id\":2,\"tasks\":[{\"id\":3},{\"id\":4}]}]}]"
+
+    it "requesting many<->many relation" $
+      get "/tasks?select=id,users(id)" `shouldRespondWith`
+        "[{\"id\":1,\"users\":[{\"id\":1},{\"id\":3}]},{\"id\":2,\"users\":[{\"id\":1}]},{\"id\":3,\"users\":[{\"id\":1}]},{\"id\":4,\"users\":[{\"id\":1}]},{\"id\":5,\"users\":[{\"id\":2},{\"id\":3}]},{\"id\":6,\"users\":[{\"id\":2}]},{\"id\":7,\"users\":[{\"id\":2}]},{\"id\":8,\"users\":null}]"
+
+    it "requesting parents and children on views" $
+      get "/projects_view?id=eq.1&select=id, name, clients(*), tasks(id, name)" `shouldRespondWith`
+        "[{\"id\":1,\"name\":\"Windows 7\",\"clients\":{\"id\":1,\"name\":\"Microsoft\"},\"tasks\":[{\"id\":1,\"name\":\"Design w7\"},{\"id\":2,\"name\":\"Code w7\"}]}]"
+
+    it "requesting children with composite key" $
+      get "/users_tasks?user_id=eq.2&task_id=eq.6&select=*, comments(content)" `shouldRespondWith`
+        "[{\"user_id\":2,\"task_id\":6,\"comments\":[{\"content\":\"Needs to be delivered ASAP\"}]}]"
 
-      it "matches the predicate" $
-        get "/items?id=eq.5"
-          `shouldRespondWith` ResponseMatcher {
-            matchBody    = Just "[{\"id\":5}]"
-          , matchStatus  = 200
-          , matchHeaders = ["Content-Range" <:> "0-0/1"]
-          }
 
   describe "ordering response" $ do
     it "by a column asc" $
-      get "/items?id=lte.2&order=asc.id"
+      get "/items?id=lte.2&order=id.asc"
         `shouldRespondWith` ResponseMatcher {
-          matchBody    = Just "[{\"id\":1},{\"id\":2}]"
+          matchBody    = Just [json| [{"id":1},{"id":2}] |]
         , matchStatus  = 200
         , matchHeaders = ["Content-Range" <:> "0-1/2"]
         }
     it "by a column desc" $
-      get "/items?id=lte.2&order=desc.id"
+      get "/items?id=lte.2&order=id.desc"
         `shouldRespondWith` ResponseMatcher {
-          matchBody    = Just "[{\"id\":2},{\"id\":1}]"
+          matchBody    = Just [json| [{"id":2},{"id":1}] |]
         , matchStatus  = 200
         , matchHeaders = ["Content-Range" <:> "0-1/2"]
         }
 
+    it "by a column asc with nulls last" $
+      get "/no_pk?order=a.asc.nullslast"
+        `shouldRespondWith` ResponseMatcher {
+          matchBody = Just [json| [{"a":"1","b":"0"},
+                              {"a":"2","b":"0"},
+                              {"a":null,"b":null}] |]
+        , matchStatus = 200
+        , matchHeaders = ["Content-Range" <:> "0-2/3"]
+        }
+
+    it "by a column desc with nulls first" $
+      get "/no_pk?order=a.desc.nullsfirst"
+        `shouldRespondWith` ResponseMatcher {
+          matchBody = Just [json| [{"a":null,"b":null},
+                              {"a":"2","b":"0"},
+                              {"a":"1","b":"0"}] |]
+        , matchStatus = 200
+        , matchHeaders = ["Content-Range" <:> "0-2/3"]
+        }
+
+    it "by a column desc with nulls last" $
+      get "/no_pk?order=a.desc.nullslast"
+        `shouldRespondWith` ResponseMatcher {
+          matchBody = Just [json| [{"a":"2","b":"0"},
+                              {"a":"1","b":"0"},
+                              {"a":null,"b":null}] |]
+        , matchStatus = 200
+        , matchHeaders = ["Content-Range" <:> "0-2/3"]
+        }
+
+    it "without other constraints" $
+      get "/items?order=id.asc" `shouldRespondWith` 200
+
+  describe "Accept headers" $ do
+    it "should respond an unknown accept type with 415" $
+      request methodGet "/simple_pk"
+              (acceptHdrs "text/unknowntype") ""
+        `shouldRespondWith` 415
+
+    it "should respond correctly to */* in accept header" $
+      request methodGet "/simple_pk"
+              (acceptHdrs "*/*") ""
+        `shouldRespondWith` 200
+
+    it "should respond correctly to multiple types in accept header" $
+      request methodGet "/simple_pk"
+              (acceptHdrs "text/unknowntype, text/csv") ""
+        `shouldRespondWith` 200
+
+    it "should respond with CSV to 'text/csv' request" $
+      request methodGet "/simple_pk"
+              (acceptHdrs "text/csv; version=1") ""
+        `shouldRespondWith` ResponseMatcher {
+          matchBody    = Just "k,extra\rxyyx,u\rxYYx,v"
+        , matchStatus  = 200
+        , matchHeaders = ["Content-Type" <:> "text/csv"]
+        }
+
   describe "Canonical location" $ do
     it "Sets Content-Location with alphabetized params" $
       get "/no_pk?b=eq.1&a=eq.1"
@@ -47,10 +286,31 @@ spec = before resetDb $ around withApp $ do
         , matchHeaders = ["Content-Location" <:> "/no_pk?a=eq.1&b=eq.1"]
         }
 
-    it "Omits question mark when there are no params" $
-      get "/no_pk"
-        `shouldRespondWith` ResponseMatcher {
-          matchBody    = Just "[]"
-        , matchStatus  = 200
-        , matchHeaders = ["Content-Location" <:> "/no_pk"]
-        }
+    it "Omits question mark when there are no params" $ do
+      r <- get "/simple_pk"
+      liftIO $ do
+        let respHeaders = simpleHeaders r
+        respHeaders `shouldSatisfy` matchHeader
+          "Content-Location" "/simple_pk"
+
+  describe "jsonb" $ do
+    it "can filter by properties inside json column" $ do
+      get "/json?data->foo->>bar=eq.baz" `shouldRespondWith`
+        [json| [{"data": {"foo": {"bar": "baz"}}}] |]
+      get "/json?data->foo->>bar=eq.fake" `shouldRespondWith`
+        [json| [] |]
+    it "can filter by properties inside json column using not" $
+      get "/json?data->foo->>bar=not.eq.baz" `shouldRespondWith`
+        [json| [] |]
+
+  describe "remote procedure call" $ do
+    context "a proc that returns a set" . before_ (clearTable "items" >> createItems 10) .
+      after_ (clearTable "items") $
+      it "returns proper json" $
+        post "/rpc/getitemrange" [json| { "min": 2, "max": 4 } |] `shouldRespondWith`
+          [json| [ {"id": 3}, {"id":4} ] |]
+
+    context "a proc that returns plain text" $
+      it "returns proper json" $
+        post "/rpc/sayhello" [json| { "name": "world" } |] `shouldRespondWith`
+          [json| [{"sayhello":"Hello, world"}] |]

test/Feature/RangeSpec.hs

@@ -2,20 +2,50 @@ module Feature.RangeSpec where
 
 import Test.Hspec
 import Test.Hspec.Wai
+import Test.Hspec.Wai.JSON
 import Network.HTTP.Types
 import Network.Wai.Test (SResponse(simpleHeaders,simpleStatus))
 
 import SpecHelper
 
 spec :: Spec
-spec = before resetDb $ around withApp $
+spec = beforeAll (clearTable "items" >> createItems 15) . afterAll_ (clearTable "items")
+  . around withApp $
   describe "GET /items" $ do
 
-    context "without range headers" $
+    context "without range headers" $ do
       context "with response under server size limit" $
         it "returns whole range with status 200" $
           get "/items" `shouldRespondWith` 200
 
+      context "when I don't want the count" $ do
+        it "returns range Content-Range with /*" $
+          request methodGet "/menagerie"
+                  [("Prefer", "count=none")] ""
+            `shouldRespondWith` ResponseMatcher {
+              matchBody    = Just "[]"
+            , matchStatus  = 200
+            , matchHeaders = ["Content-Range" <:> "*/*"]
+            }
+
+        it "returns range Content-Range with range/*" $
+          request methodGet "/items?order=id"
+                  [("Prefer", "count=none")] ""
+            `shouldRespondWith` ResponseMatcher {
+              matchBody    = Just [json| [{"id":1},{"id":2},{"id":3},{"id":4},{"id":5},{"id":6},{"id":7},{"id":8},{"id":9},{"id":10},{"id":11},{"id":12},{"id":13},{"id":14},{"id":15}] |]
+            , matchStatus  = 200
+            , matchHeaders = ["Content-Range" <:> "0-14/*"]
+            }
+
+        it "returns range Content-Range with range/* even using other filters" $
+          request methodGet "/items?id=eq.1&order=id"
+                  [("Prefer", "count=none")] ""
+            `shouldRespondWith` ResponseMatcher {
+              matchBody    = Just [json| [{"id":1}] |]
+            , matchStatus  = 200
+            , matchHeaders = ["Content-Range" <:> "0-0/*"]
+            }
+
     context "with range headers" $ do
 
       context "of acceptable range" $ do

test/Feature/StructureSpec.hs

@@ -1,4 +1,3 @@
-{-# LANGUAGE OverloadedStrings, QuasiQuotes #-}
 module Feature.StructureSpec where
 
 import Test.Hspec hiding (pendingWith)
@@ -10,24 +9,39 @@ import SpecHelper
 import Network.HTTP.Types
 
 spec :: Spec
-spec = before resetDb $ around withApp $ do
+spec = around withApp $ do
   describe "GET /" $ do
     it "lists views in schema" $
       request methodGet "/" [] ""
         `shouldRespondWith` [json| [
           {"schema":"1","name":"auto_incrementing_pk","insertable":true}
+        , {"schema":"1","name":"clients","insertable":true}
+        , {"schema":"1","name":"comments","insertable":true}
+        , {"schema":"1","name":"complex_items","insertable":true}
         , {"schema":"1","name":"compound_pk","insertable":true}
+        , {"schema":"1","name":"has_count_column","insertable":false}
         , {"schema":"1","name":"has_fk","insertable":true}
+        , {"schema":"1","name":"insertable_view_with_join","insertable":true}
         , {"schema":"1","name":"items","insertable":true}
+        , {"schema":"1","name":"json","insertable":true}
+        , {"schema":"1","name":"materialized_view","insertable":false}
         , {"schema":"1","name":"menagerie","insertable":true}
         , {"schema":"1","name":"no_pk","insertable":true}
+        , {"schema":"1","name":"nullable_integer","insertable":true}
+        , {"schema":"1","name":"projects","insertable":true}
+        , {"schema":"1","name":"projects_view","insertable":true}
         , {"schema":"1","name":"simple_pk","insertable":true}
+        , {"schema":"1","name":"tasks","insertable":true}
+        , {"schema":"1","name":"tsearch","insertable":true}
+        , {"schema":"1","name":"users","insertable":true}
+        , {"schema":"1","name":"users_projects","insertable":true}
+        , {"schema":"1","name":"users_tasks","insertable":true}
         ] |]
         {matchStatus = 200}
 
     it "lists only views user has permission to see" $ do
       _ <- post "/postgrest/users" [json| { "id":"jdoe", "pass": "1234", "role": "postgrest_test_author" } |]
-      let auth = authHeader "jdoe" "1234"
+      let auth = authHeaderBasic "jdoe" "1234"
 
       request methodGet "/" [auth] ""
         `shouldRespondWith` [json| [
@@ -139,6 +153,102 @@ spec = before resetDb $ around withApp $ do
       }
       |]
 
+    it "it includes primary and foreign keys for views" $
+      request methodOptions "/insertable_view_with_join" [] "" `shouldRespondWith`
+      [json|
+      {
+         "pkey":[
+            "id"
+         ],
+         "columns":[
+            {
+               "references":null,
+               "default":null,
+               "precision":64,
+               "updatable":false,
+               "schema":"1",
+               "name":"id",
+               "type":"bigint",
+               "maxLen":null,
+               "enum":[],
+               "nullable":true,
+               "position":1
+            },
+            {
+               "references":{
+                  "column":"id",
+                  "table":"auto_incrementing_pk"
+               },
+               "default":null,
+               "precision":32,
+               "updatable":false,
+               "schema":"1",
+               "name":"auto_inc_fk",
+               "type":"integer",
+               "maxLen":null,
+               "enum":[],
+               "nullable":true,
+               "position":2
+            },
+            {
+               "references":{
+                  "column":"k",
+                  "table":"simple_pk"
+               },
+               "default":null,
+               "precision":null,
+               "updatable":false,
+               "schema":"1",
+               "name":"simple_fk",
+               "type":"character varying",
+               "maxLen":255,
+               "enum":[],
+               "nullable":true,
+               "position":3
+            },
+            {
+               "references":null,
+               "default":null,
+               "precision":null,
+               "updatable":false,
+               "schema":"1",
+               "name":"nullable_string",
+               "type":"character varying",
+               "maxLen":null,
+               "enum":[],
+               "nullable":true,
+               "position":4
+            },
+            {
+               "references":null,
+               "default":null,
+               "precision":null,
+               "updatable":false,
+               "schema":"1",
+               "name":"non_nullable_string",
+               "type":"character varying",
+               "maxLen":null,
+               "enum":[],
+               "nullable":true,
+               "position":5
+            },
+            {
+               "references":null,
+               "default":null,
+               "precision":null,
+               "updatable":false,
+               "schema":"1",
+               "name":"inserted_at",
+               "type":"timestamp with time zone",
+               "maxLen":null,
+               "enum":[],
+               "nullable":true,
+               "position":6
+            }
+         ]
+      }
+      |]
+
     it "includes foreign key data" $ do
       pendingWith "have to resolve issue #107"
 

test/Main.hs

@@ -0,0 +1,8 @@
+module Main where
+
+import Test.Hspec
+import SpecHelper
+import Spec
+
+main :: IO ()
+main = resetDb >> hspec spec

test/Spec.hs

@@ -1 +1 @@
-{-# OPTIONS_GHC -F -pgmF hspec-discover #-}
+{-# OPTIONS_GHC -F -pgmF hspec-discover -optF --no-main #-}

test/SpecHelper.hs

@@ -1,5 +1,3 @@
-{-# LANGUAGE QuasiQuotes, OverloadedStrings #-}
-
 module SpecHelper where
 
 import Network.Wai
@@ -7,63 +5,92 @@ import Test.Hspec
 import Test.Hspec.Wai
 
 import Hasql as H
-import Hasql.Postgres as H
+import Hasql.Backend as B
+import Hasql.Postgres as P
 
 import Data.String.Conversions (cs)
--- import Control.Exception.Base (bracket, finally)
+import Data.Monoid
+import Data.Text hiding (map)
+import qualified Data.Vector as V
 import Control.Monad (void)
-import Control.Exception
+import Control.Applicative
 
 import Network.HTTP.Types.Header (Header, ByteRange, renderByteRange,
-                                  hRange, hAuthorization)
+                                  hRange, hAuthorization, hAccept)
 import Codec.Binary.Base64.String (encode)
 import Data.CaseInsensitive (CI(..))
 import Data.Maybe (fromMaybe)
 import Text.Regex.TDFA ((=~))
 import qualified Data.ByteString.Char8 as BS
-import Network.Wai.Middleware.Cors (cors)
 import System.Process (readProcess)
 
-import App (app, sqlError, isSqlError)
-import Config (AppConfig(..), corsPolicy)
-import Middleware
--- import Auth (addUser)
+import qualified Data.Aeson.Types as J
+
+import PostgREST.App (app)
+import PostgREST.Config (AppConfig(..))
+import PostgREST.Middleware
+import PostgREST.Error(errResponse)
+import PostgREST.PgStructure
+import PostgREST.Types
 
 isLeft :: Either a b -> Bool
 isLeft (Left _ ) = True
 isLeft _ = False
 
 cfg :: AppConfig
-cfg = AppConfig "postgrest_test" 5432 "postgrest_test" "" "localhost" 3000 "postgrest_anonymous" False 10
+cfg = AppConfig "postgrest_test" 5432 "postgrest_test" "" "localhost" 3000 "postgrest_anonymous" False 10 "1" "safe"
 
-testSettings :: SessionSettings
-testSettings = fromMaybe (error "bad settings") $ H.sessionSettings 1 30
+testPoolOpts :: PoolSettings
+testPoolOpts = fromMaybe (error "bad settings") $ H.poolSettings 1 30
 
-pgSettings :: Postgres
-pgSettings = H.ParamSettings "localhost" 5432 "postgrest_test" "" "postgrest_test"
+pgSettings :: P.Settings
+pgSettings = P.ParamSettings (cs $ configDbHost cfg)
+                             (fromIntegral $ configDbPort cfg)
+                             (cs $ configDbUser cfg)
+                             (cs $ configDbPass cfg)
+                             (cs $ configDbName cfg)
 
 withApp :: ActionWith Application -> IO ()
-withApp perform =
-  let anonRole = cs $ configAnonRole cfg in
-  perform $ middle $ \req resp ->
-    H.session pgSettings testSettings $ H.sessionUnlifter >>= \unlift ->
-      liftIO $ do
-        body <- strictRequestBody req
-        resp =<< catchJust isSqlError
-          (unlift $ H.tx Nothing
-                  $ authenticated anonRole (app body) req)
-          (return . sqlError)
+withApp perform = do
+  pool :: H.Pool P.Postgres
+    <- H.acquirePool pgSettings testPoolOpts
 
-  where middle = cors corsPolicy
+  let txSettings = Just (H.ReadCommitted, Just True)
+  metadata <- H.session pool $ H.tx txSettings $ do
+    tabs <- allTables
+    rels <- allRelations
+    cols <- allColumns rels
+    keys <- allPrimaryKeys
+    return (tabs, rels, cols, keys)
+
+  dbstructure <- case metadata of
+    Left e -> fail $ show e
+    Right (tabs, rels, cols, keys) ->
+      return $ DbStructure {
+          tables=tabs
+        , columns=cols
+        , relations=rels
+        , primaryKeys=keys
+        }
+
+  perform $ middle $ \req resp -> do
+    body <- strictRequestBody req
+    result <- liftIO $ H.session pool $ H.tx txSettings
+      $ authenticated cfg (app dbstructure cfg body) req
+    either (resp . errResponse) resp result
+
+  where middle = defaultMiddle False
 
 
 resetDb :: IO ()
 resetDb = do
-  H.session pgSettings testSettings $
+  pool :: H.Pool P.Postgres
+    <- H.acquirePool pgSettings testPoolOpts
+  void . liftIO $ H.session pool $
     H.tx Nothing $ do
-      H.unit [H.q| drop schema if exists "1" cascade |]
-      H.unit [H.q| drop schema if exists private cascade |]
-      H.unit [H.q| drop schema if exists postgrest cascade |]
+      H.unitEx [H.stmt| drop schema if exists "1" cascade |]
+      H.unitEx [H.stmt| drop schema if exists private cascade |]
+      H.unitEx [H.stmt| drop schema if exists postgrest cascade |]
 
   loadFixture "roles"
   loadFixture "schema"
@@ -77,6 +104,9 @@ loadFixture name =
 rangeHdrs :: ByteRange -> [Header]
 rangeHdrs r = [rangeUnit, (hRange, renderByteRange r)]
 
+acceptHdrs :: BS.ByteString -> [Header]
+acceptHdrs mime = [(hAccept, mime)]
+
 rangeUnit :: Header
 rangeUnit = ("Range-Unit" :: CI BS.ByteString, "items")
 
@@ -84,14 +114,74 @@ matchHeader :: CI BS.ByteString -> String -> [Header] -> Bool
 matchHeader name valRegex headers =
   maybe False (=~ valRegex) $ lookup name headers
 
-authHeader :: String -> String -> Header
-authHeader u p =
+authHeaderBasic :: String -> String -> Header
+authHeaderBasic u p =
   (hAuthorization, cs $ "Basic " ++ encode (u ++ ":" ++ p))
 
--- for hspec-wai
-pending_ :: WaiSession ()
-pending_ = liftIO Test.Hspec.pending
+authHeaderJWT :: String -> Header
+authHeaderJWT token =
+  (hAuthorization, cs $ "Bearer " ++ token)
 
--- for hspec-wai
-pendingWith_ :: String -> WaiSession ()
-pendingWith_ = liftIO . Test.Hspec.pendingWith
+testPool :: IO(H.Pool P.Postgres)
+testPool = H.acquirePool pgSettings testPoolOpts
+
+clearTable :: Text -> IO ()
+clearTable table = do
+  pool <- testPool
+  void . liftIO $ H.session pool $ H.tx Nothing $
+    H.unitEx $ B.Stmt ("delete from \"1\"."<>table) V.empty True
+
+createItems :: Int -> IO ()
+createItems n = do
+  pool <- testPool
+  void . liftIO $ H.session pool $ H.tx Nothing txn
+  where
+    txn = mapM_ H.unitEx stmts
+    stmts = map [H.stmt|insert into "1".items (id) values (?)|] [1..n]
+
+createComplexItems :: IO ()
+createComplexItems = do
+  pool <- testPool
+  void . liftIO $ H.session pool $ H.tx Nothing txn
+  where
+    txn = mapM_ H.unitEx stmts
+    stmts = getZipList $ [H.stmt|insert into "1".complex_items (id, name, settings) values (?,?,?)|]
+        <$> ZipList ([1..3]::[Int])
+        <*> ZipList (["One", "Two", "Three"]::[Text])
+        <*> ZipList ([jobj,jobj,jobj])
+    jobj = (J.object [("foo", J.object [("int", J.Number 1),("bar", J.String "baz")])])
+
+createNulls :: Int -> IO ()
+createNulls n = do
+  pool <- testPool
+  void . liftIO $ H.session pool $ H.tx Nothing txn
+  where
+    txn = mapM_ H.unitEx (stmt':stmts)
+    stmt' = [H.stmt|insert into "1".no_pk (a,b) values (null,null)|]
+    stmts = map [H.stmt|insert into "1".no_pk (a,b) values (?,0)|] [1..n]
+
+createNullInteger :: IO ()
+createNullInteger = do
+  pool <- testPool
+  void . liftIO $ H.session pool $ H.tx Nothing $
+    H.unitEx $ [H.stmt| insert into "1".nullable_integer (a) values (null) |]
+
+createLikableStrings :: IO ()
+createLikableStrings = do
+  pool <- testPool
+  void . liftIO $ H.session pool $ H.tx Nothing $ do
+    H.unitEx $ insertSimplePk "xyyx" "u"
+    H.unitEx $ insertSimplePk "xYYx" "v"
+  where
+    insertSimplePk :: Text -> Text -> H.Stmt P.Postgres
+    insertSimplePk = [H.stmt|insert into "1".simple_pk (k, extra) values (?,?)|]
+
+createJsonData :: IO ()
+createJsonData = do
+  pool <- testPool
+  void . liftIO $ H.session pool $ H.tx Nothing $
+    H.unitEx $
+      [H.stmt|
+        insert into "1".json (data) values (?)
+      |]
+      (J.object [("foo", J.object [("bar", J.String "baz")])])

test/TestTypes.hs

@@ -8,9 +8,11 @@ module TestTypes (
 import qualified Data.Aeson as JSON
 import Data.Aeson ((.:))
 -- import Data.Maybe (fromJust)
-import Control.Applicative ((<$>), (<*>))
+import Control.Applicative
 import Control.Monad (mzero)
 
+import Prelude
+
 data IncPK = IncPK {
   incId :: Int
 , incNullableStr :: Maybe String

test/Unit/ErrorsSpec.hs

@@ -1,41 +0,0 @@
-module Unit.ErrorsSpec where
-
-import Test.Hspec
-
-import Text.Parsec
-import PgError
-import Data.Either (rights)
-
-spec :: Spec
-spec =
-  describe "Parsing Hasql errors" $ do
-    it "can handle status and code" $
-      let p = parse message "" "Status: \"foo\"; Code: \"abc\"." in
-      rights [p] `shouldBe` [
-          Message (Just "foo") "abc" Nothing Nothing
-        ]
-    it "can handle weird redundant quotes in status" $
-      let p = parse message "" "Status: \"\"foo\"\"; Code: \"abc\"." in
-      rights [p] `shouldBe` [
-          Message (Just "foo") "abc" Nothing Nothing
-        ]
-    it "can handle text and code" $
-      let p = parse message "" "Message: \"foo\"; Code: \"abc\"." in
-      rights [p] `shouldBe` [
-          Message Nothing "abc" (Just "foo") Nothing
-        ]
-    it "can handle status, text and code" $
-      let p = parse message "" "Status: \"hi\"; Message: \"foo\"; Code: \"abc\"." in
-      rights [p] `shouldBe` [
-          Message (Just "hi") "abc" (Just "foo") Nothing
-        ]
-    it "can handle unescaped quotes in message" $
-      let p = parse message "" "Status: \"hi\"; Message: \"unknown \"foo\"!\"; Code: \"abc\"." in
-      rights [p] `shouldBe` [
-          Message (Just "hi") "abc" (Just "unknown \"foo\"!") Nothing
-        ]
-    it "can handle periods in message" $
-      let p = parse message "" "Message: \"unknown \"foo\".bar\"; Code: \"42P01\"." in
-      rights [p] `shouldBe` [
-          Message Nothing "42P01" (Just "unknown \"foo\".bar") Nothing
-        ]

test/Unit/PgQuerySpec.hx

@@ -79,7 +79,7 @@ spec = around dbWithSchema $ do
     addUser user pass role conn
     return conn) $ do
     it "accepts correct credentials and return the role" $ \conn ->
-      signInRole user pass conn `shouldReturn` LoginSuccess role
+      signInRole user pass conn `shouldReturn` LoginSuccess role user
 
     it "returns nothing with bad creds" $ \conn -> do
       signInRole "not-a-user" pass conn `shouldReturn` LoginFailed

test/Unit/PgStructureSpec.hx

@@ -14,7 +14,7 @@ spec = around dbWithSchema $ beforeWith setRole $ do
     it "shows all the tables" $ \conn -> do
       ts <- tables "1" conn
       map tableName ts `shouldBe` ["authors_only","auto_incrementing_pk",
-        "compound_pk","has_fk","items","menagerie","no_pk", "simple_pk"]
+        "compound_pk","has_fk","insertable_view_with_join","items","menagerie","no_pk", "simple_pk"]
 
   describe "columns" $ do
     it "responds with each column for the table" $ \conn -> do