Middleware compiles
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@@ -21,6 +21,7 @@ module PostgREST.Auth (
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import Control.Monad (join)
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import Data.Aeson (Value (..), Object)
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import Data.Aeson.Types (emptyObject, emptyArray)
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import qualified Data.ByteString as BS
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import Data.Vector as V (null, head)
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import Data.Map as M (fromList, toList)
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import Data.Monoid ((<>))
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@@ -38,12 +39,12 @@ import qualified Data.HashMap.Lazy as H
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this one is mapped to a SET ROLE statement.
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In case there is any problem decoding the JWT it returns Nothing.
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-}
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claimsToSQL :: JWT.ClaimsMap -> [Text]
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claimsToSQL :: JWT.ClaimsMap -> [BS.ByteString]
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claimsToSQL = map setVar . toList
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where
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setVar ("role", String val) = setRole val
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setVar (k, val) = "set local postgrest.claims." <> pgFmtIdent k <>
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" = " <> valueToVariable val <> ";"
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setVar (k, val) = "set local postgrest.claims." <> cs (pgFmtIdent k) <>
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" = " <> cs (valueToVariable val) <> ";"
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valueToVariable = pgFmtLit . unquoted
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{-|
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@@ -66,7 +67,7 @@ jwtClaims secret input time =
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customClaims = claim JWT.unregisteredClaims
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-- | Receives the name of a role and returns a SET ROLE statement
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setRole :: Text -> Text
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setRole :: Text -> BS.ByteString
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setRole role = "set local role " <> cs (pgFmtLit role) <> ";"
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@@ -24,27 +24,25 @@ import PostgREST.Error (errResponse)
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import Prelude hiding(concat)
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import qualified Data.Vector as V
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import qualified Data.Map.Lazy as M
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runWithClaims :: forall s. AppConfig -> NominalDiffTime ->
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runWithClaims :: AppConfig -> NominalDiffTime ->
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(Request -> H.Session Response) ->
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Request -> H.Session Response
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runWithClaims conf time app req = do
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_ <- H.unitEx $ stmt setAnon
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H.sql setAnon
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case split (== ' ') (cs auth) of
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("Bearer" : tokenStr : _) ->
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case jwtClaims jwtSecret tokenStr time of
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Just claims ->
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if M.member "role" claims
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then do
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mapM_ H.unitEx $ stmt <$> claimsToSQL claims
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mapM_ H.sql $ claimsToSQL claims
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app req
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else invalidJWT
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_ -> invalidJWT
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_ -> app req
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where
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stmt c = B.Stmt c V.empty True
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hdrs = requestHeaders req
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jwtSecret = configJwtSecret conf
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auth = fromMaybe "" $ lookup hAuthorization hdrs
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