30 lines
1.1 KiB
Haskell
30 lines
1.1 KiB
Haskell
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{-# LANGUAGE OverloadedStrings #-}
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{-# LANGUAGE PackageImports #-}
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{-# LANGUAGE RecordWildCards #-}
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module Main (main) where
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import "base" Data.Monoid ((<>))
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import "bytestring" Data.ByteString.Char8 (pack, unpack)
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import "http-proxy" Network.HTTP.Proxy (runProxySettings, defaultProxySettings, Settings(..), Request(..))
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import "http-types" Network.HTTP.Types (status302)
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import "https-everywhere-rules" Data.HTTPSEverywhere.Rules (rewriteURL)
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import "network-uri" Network.URI (URI, parseURI)
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import "wai" Network.Wai (Response, responseLBS)
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(<&>) :: Functor f => f a -> (a -> b) -> f b
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(<&>) = flip fmap; infixl 1 <&>
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httpRedirect :: URI -> Response
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httpRedirect to = responseLBS status302 [("Location", pack . show $ to)] ""
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tryHTTPS :: Request -> IO (Either Response Request)
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tryHTTPS Request{..} = case parseURI . unpack $ requestPath <> queryString of
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Just uri -> rewriteURL uri <&> \rewrite -> if rewrite == uri
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then return Request{..}
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else Left $ httpRedirect rewrite
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Nothing -> return $ Right Request{..}
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main :: IO ()
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main = runProxySettings $ defaultProxySettings { proxyRequestModifier = tryHTTPS }
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