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fix: handle CORS pre-flight requests correctly #3052

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fix: handle CORS pre-flight requests correctly #3052

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4 changes: 4 additions & 0 deletions cabal.project
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Original file line number Diff line number Diff line change
Expand Up @@ -2,3 +2,7 @@ packages: postgrest.cabal
tests: true
package *
ghc-options: -split-sections
source-repository-package
type: git
location: https://github.com/laurenceisla/wai-cors.git
tag: e2da0d7a3e56592a5f4b35fd3aa6ccd3175525cc
Comment on lines +5 to +8
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Using a temporary fork, ideally this would be merged upstream and it should fix allowing using OPTIONS with the Origin header without returning errors.

9 changes: 9 additions & 0 deletions nix/overlays/haskell-packages.nix
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Expand Up @@ -73,6 +73,15 @@ let
{ }
);

wai-cors = lib.dontCheck (
prev.callCabal2nixWithOptions "wai-cors" (super.fetchFromGitHub {
owner = "laurenceisla";
repo = "wai-cors";
rev = "e2da0d7a3e56592a5f4b35fd3aa6ccd3175525cc";
sha256 = "sha256-lTzFiH7c7ZpR+hg6jJXvPKM2DtwMs8gdjdk68GTmtaQ=";
}) "--subpath=." {}
);

};
in
{
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2 changes: 1 addition & 1 deletion src/PostgREST/Cors.hs
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Expand Up @@ -39,7 +39,7 @@ corsPolicy corsAllowedOrigins req = case lookup "origin" headers of
, Wai.corsMaxAge = Just $ 60*60*24
, Wai.corsVaryOrigin = False
, Wai.corsRequireOrigin = False
, Wai.corsIgnoreFailures = True
, Wai.corsIgnoreFailures = False
}
Nothing -> Nothing
where
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3 changes: 1 addition & 2 deletions src/PostgREST/Response.hs
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Expand Up @@ -251,8 +251,7 @@ actionResponse (NoDbResult SchemaInfoPlan) _ _ _ _ _ _ = respondInfo "OPTIONS,GE

respondInfo :: ByteString -> Either Error.Error PgrstResponse
respondInfo allowHeader =
let allOrigins = ("Access-Control-Allow-Origin", "*") in
Right $ PgrstResponse HTTP.status200 [allOrigins, (HTTP.hAllow, allowHeader)] mempty
Right $ PgrstResponse HTTP.status200 [(HTTP.hAllow, allowHeader)] mempty

-- Status and headers can be overridden as per https://postgrest.org/en/stable/references/transactions.html#response-headers
overrideStatusHeaders :: Maybe Text -> Maybe BS.ByteString -> HTTP.Status -> [HTTP.Header]-> Either Error.Error (HTTP.Status, [HTTP.Header])
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2 changes: 2 additions & 0 deletions stack.yaml
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Expand Up @@ -13,3 +13,5 @@ extra-deps:
- fuzzyset-0.2.4
- hasql-notifications-0.2.2.0
- hasql-pool-1.0.1
- git: https://github.com/laurenceisla/wai-cors.git
commit: e2da0d7a3e56592a5f4b35fd3aa6ccd3175525cc
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