fix: server-host !6 incorrectly binds to IPv4 address

Updates streaming-commons to version 0.2.3.1. This resolves #3202.

Signed-off-by: Taimoor Zaeem <taimoorzaeem@gmail.com>

CHANGELOG.md

@@ -7,6 +7,7 @@ All notable changes to this project will be documented in this file. From versio
 ## Fixed
 
 - Fix `db-pre-config` function failing when function names are pg reserved words by @taimoorzaeem in #4380
+- Fix `server-host=!6` incorrectly binds to IPv4 address by @taimoorzaeem in #3202
 
 ## [14.0] - 2025-10-24
 

cabal.project.freeze

@@ -1 +1 @@
-index-state: hackage.haskell.org 2025-10-13T04:53:27Z
+index-state: hackage.haskell.org 2025-10-29T04:02:18Z

nix/overlays/haskell-packages.nix

@@ -60,6 +60,16 @@ let
           }
           { };
 
+      # TODO: Remove once available in nixpkgs haskellPackages
+      streaming-commons =
+        prev.callHackageDirect
+          {
+            pkg = "streaming-commons";
+            ver = "0.2.3.1";
+            sha256 = "sha256-Gl2eaJcWe1sxmcE/octWlH9uSnERguf+5H66K4fV87s=";
+          }
+          { };
+
       # Downgrade hasql and related packages while we are still on GHC 9.4 for the static build.
       hasql = lib.dontCheck (lib.doJailbreak prev.hasql_1_6_4_4);
       hasql-dynamic-statements = lib.dontCheck prev.hasql-dynamic-statements_0_3_1_5;

postgrest.cabal

@@ -139,7 +139,7 @@ library
                     , regex-tdfa                >= 1.2.2 && < 1.4
                     , retry                     >= 0.7.4 && < 0.10
                     , scientific                >= 0.3.4 && < 0.4
-                    , streaming-commons         >= 0.1.1 && < 0.3
+                    , streaming-commons         >= 0.2.3.1 && < 0.3
                     , swagger2                  >= 2.4 && < 2.9
                     , text                      >= 1.2.2 && < 2.2
                     , time                      >= 1.6 && < 1.13

stack.yaml

@@ -14,3 +14,4 @@ extra-deps:
   - hasql-pool-1.0.1
   - jose-jwt-0.10.0
   - postgresql-libpq-0.10.1.0
+  - streaming-commons-0.2.3.1

stack.yaml.lock

@@ -39,6 +39,13 @@ packages:
       size: 1096
   original:
     hackage: postgresql-libpq-0.10.1.0
+- completed:
+    hackage: streaming-commons-0.2.3.1@sha256:ed7999fea9e912b1211ea93d7e20a7998bf4753166370c94048885650f303bf0,4841
+    pantry-tree:
+      sha256: f08e83fb00fd45865fa8cfdef5ecef7161d5135257ee98050bfbe4b807ad65f8
+      size: 2374
+  original:
+    hackage: streaming-commons-0.2.3.1
 snapshots:
 - completed:
     sha256: 238fa745b64f91184f9aa518fe04bdde6552533d169b0da5256670df83a0f1a9

test/io/postgrest.py

@@ -94,11 +94,19 @@ def run(
     "Run PostgREST and yield an endpoint that is ready for connections."
 
     with tempfile.TemporaryDirectory() as tmpdir:
+
+        # with python requests, "localhost" doesn't automatically resolves
+        # to [::1], hence we use this explicitly when host is ipv6 special
+        # address
+        ipv6_special_addresses = ["*6", "!6"]
+
+        localhost = "[::1]" if host in ipv6_special_addresses else "localhost"
+
         if port:
             env["PGRST_SERVER_PORT"] = str(port)
-            env["PGRST_SERVER_HOST"] = host or "localhost"
+            env["PGRST_SERVER_HOST"] = host or localhost
             # When constructing IPv6 address, host address should be bracketed like [host]
-            apihost = f"[{host}]" if host and is_ipv6(host) else "localhost"
+            apihost = f"[{host}]" if host and is_ipv6(host) else localhost
             baseurl = f"http://{apihost}:{port}"
         else:
             socketfile = pathlib.Path(tmpdir) / "postgrest.sock"
@@ -107,7 +115,7 @@ def run(
 
         adminport = freeport(port)
         env["PGRST_ADMIN_SERVER_PORT"] = str(adminport)
-        adminhost = f"[{host}]" if host and is_ipv6(host) else "localhost"
+        adminhost = f"[{host}]" if host and is_ipv6(host) else localhost
         adminurl = f"http://{adminhost}:{adminport}"
 
         command = [POSTGREST_BIN]