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{-# LANGUAGE CPP #-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE ScopedTypeVariables #-}
import Blaze.ByteString.Builder (fromByteString)
import Control.Applicative ((<$>))
import Control.Concurrent (forkIO, killThread, newEmptyMVar,
putMVar, takeMVar, threadDelay)
import Control.Exception (IOException, bracket,
onException, try)
import Control.Monad (forever, unless)
import Control.Monad.IO.Class (liftIO)
import Control.Monad.Trans.Resource (runResourceT)
import Data.Maybe (fromMaybe)
import qualified Data.ByteString as S
import qualified Data.ByteString.Char8 as S8
import qualified Data.ByteString.Lazy.Char8 as L8
import Data.Char (toUpper)
import Data.Conduit (await, yield, (.|), runConduit,
awaitForever)
import qualified Data.Conduit.Binary as CB
import qualified Data.Conduit.List as CL
import Data.Conduit.Network (ServerSettings,
appSink, appSource,
clientSettings, runTCPClient,
runTCPServer, serverSettings)
import qualified Data.IORef as I
import Data.Streaming.Network (AppData,
bindPortTCP, setAfterBind)
import qualified Network.HTTP.Conduit as HC
import Network.HTTP.ReverseProxy (ProxyDest (..),
WaiProxyResponse (..),
defaultOnExc, rawProxyTo, rawTcpProxyTo,
WaiProxySettings (..),
SetIpHeader (..),
defaultWaiProxySettings,
waiProxyToSettings,
waiProxyTo)
import Network.HTTP.Types (status200, status500)
import qualified Network.Socket
import Network.Wai (rawPathInfo, responseLBS,
responseStream, requestHeaders)
import qualified Network.Wai
import Network.Wai.Handler.Warp (defaultSettings, runSettings,
setBeforeMainLoop, setPort)
import System.IO.Unsafe (unsafePerformIO)
import UnliftIO (timeout)
import UnliftIO.IORef
import Test.Hspec (describe, hspec, it, shouldBe)
nextPort :: I.IORef Int
nextPort = unsafePerformIO $ I.newIORef 15452
{-# NOINLINE nextPort #-}
getPort :: IO Int
getPort = do
port <- I.atomicModifyIORef nextPort $ \p -> (p + 1, p)
esocket <- try $ bindPortTCP port "127.0.0.1"
case esocket of
Left (_ :: IOException) -> getPort
Right socket -> do
Network.Socket.close socket
return port
withWApp :: Network.Wai.Application -> (Int -> IO ()) -> IO ()
withWApp app f = do
port <- getPort
baton <- newEmptyMVar
bracket
(forkIO $ runSettings (settings port baton)
app `onException` putMVar baton ())
killThread
(const $ takeMVar baton >> f port)
where
settings port baton
= setPort port
$ setBeforeMainLoop (putMVar baton ())
defaultSettings
withCApp :: (AppData -> IO ()) -> (Int -> IO ()) -> IO ()
withCApp app f = do
port <- getPort
baton <- newEmptyMVar
let start = putMVar baton ()
settings = setAfterBind (const start) (serverSettings port "*" :: ServerSettings)
bracket
(forkIO $ runTCPServer settings app `onException` start)
killThread
(const $ takeMVar baton >> f port)
withMan :: (HC.Manager -> IO ()) -> IO ()
withMan = (HC.newManager HC.tlsManagerSettings >>=)
main :: IO ()
main = hspec $
describe "http-reverse-proxy" $ do
it "works" $
let content = "mainApp"
in withMan $ \manager ->
withWApp (\_ f -> f $ responseLBS status200 [] content) $ \port1 ->
withWApp (waiProxyTo (const $ return $ WPRProxyDest $ ProxyDest "127.0.0.1" port1) defaultOnExc manager) $ \port2 ->
withCApp (rawProxyTo (const $ return $ Right $ ProxyDest "127.0.0.1" port2)) $ \port3 ->
withCApp (rawTcpProxyTo (ProxyDest "127.0.0.1" port3)) $ \port4 -> do
lbs <- HC.simpleHttp $ "http://127.0.0.1:" ++ show port4
lbs `shouldBe` content
it "modified path" $
let content = "/somepath"
app req f = f $ responseLBS status200 [] $ L8.fromChunks [rawPathInfo req]
modReq pdest req = return $ WPRModifiedRequest
(req { rawPathInfo = content })
pdest
in withMan $ \manager ->
withWApp app $ \port1 ->
withWApp (waiProxyTo (modReq $ ProxyDest "127.0.0.1" port1) defaultOnExc manager) $ \port2 ->
withCApp (rawProxyTo (const $ return $ Right $ ProxyDest "127.0.0.1" port2)) $ \port3 ->
withCApp (rawTcpProxyTo (ProxyDest "127.0.0.1" port3)) $ \port4 -> do
lbs <- HC.simpleHttp $ "http://127.0.0.1:" ++ show port4
S8.concat (L8.toChunks lbs) `shouldBe` content
it "deals with streaming data" $
let app _ f = f $ responseStream status200 [] $ \sendChunk flush -> forever $ do
sendChunk $ fromByteString "hello"
flush
liftIO $ threadDelay 10000000
in withMan $ \manager ->
withWApp app $ \port1 ->
withWApp (waiProxyTo (const $ return $ WPRProxyDest $ ProxyDest "127.0.0.1" port1) defaultOnExc manager) $ \port2 -> do
req <- HC.parseUrlThrow $ "http://127.0.0.1:" ++ show port2
mbs <- runResourceT $ timeout 1000000 $ do
res <- HC.http req manager
runConduit $ HC.responseBody res .| await
mbs `shouldBe` Just (Just "hello")
it "passes on body length" $
let app req f = f $ responseLBS
status200
[("uplength", show' $ Network.Wai.requestBodyLength req)]
""
body = "some body"
show' Network.Wai.ChunkedBody = "chunked"
show' (Network.Wai.KnownLength i) = S8.pack $ show i
in withMan $ \manager ->
withWApp app $ \port1 ->
withWApp (waiProxyTo (const $ return $ WPRProxyDest $ ProxyDest "127.0.0.1" port1) defaultOnExc manager) $ \port2 -> do
req' <- HC.parseUrlThrow $ "http://127.0.0.1:" ++ show port2
let req = req'
{ HC.requestBody = HC.RequestBodyBS body
}
mlen <- runResourceT $ do
res <- HC.http req manager
return $ lookup "uplength" $ HC.responseHeaders res
mlen `shouldBe` Just (show'
$ Network.Wai.KnownLength
$ fromIntegral
$ S.length body)
it "upgrade to raw" $
let app _ f = f $ flip Network.Wai.responseRaw fallback $ \src sink -> do
let src' = do
bs <- liftIO src
unless (S8.null bs) $ yield bs >> src'
sink' = awaitForever $ liftIO . sink
runConduit $ src' .| CL.iterM print .| CL.map (S8.map toUpper) .| sink'
fallback = responseLBS status500 [] "fallback used"
in withMan $ \manager ->
withWApp app $ \port1 ->
withWApp (waiProxyTo (const $ return $ WPRProxyDest $ ProxyDest "127.0.0.1" port1) defaultOnExc manager) $ \port2 ->
runTCPClient (clientSettings port2 "127.0.0.1") $ \ad -> do
runConduit $ yield "GET / HTTP/1.1\r\nUpgrade: websockET\r\n\r\n" .| appSink ad
runConduit $ yield "hello" .| appSink ad
(runConduit $ appSource ad .| CB.take 5) >>= (`shouldBe` "HELLO")
it "get real ip" $
let getRealIp req = L8.fromStrict $ fromMaybe "" $ lookup "x-real-ip" (requestHeaders req)
httpWithForwardedFor url = liftIO $ do
man <- HC.newManager HC.tlsManagerSettings
oreq <- liftIO $ HC.parseUrlThrow url
let req = oreq { HC.requestHeaders = [("X-Forwarded-For", "127.0.1.1, 127.0.0.1"), ("Connection", "close")] }
HC.responseBody <$> HC.httpLbs req man
waiProxyTo' getDest onError = waiProxyToSettings getDest defaultWaiProxySettings { wpsOnExc = onError, wpsSetIpHeader = SIHFromHeader }
in withMan $ \manager ->
withWApp (\r f -> f $ responseLBS status200 [] $ getRealIp r ) $ \port1 ->
withWApp (waiProxyTo' (const $ return $ WPRProxyDest $ ProxyDest "127.0.0.1" port1) defaultOnExc manager) $ \port2 ->
withCApp (rawProxyTo (const $ return $ Right $ ProxyDest "127.0.0.1" port2)) $ \port3 ->
withCApp (rawTcpProxyTo (ProxyDest "127.0.0.1" port3)) $ \port4 -> do
lbs <- httpWithForwardedFor $ "http://127.0.0.1:" ++ show port4
lbs `shouldBe` "127.0.1.1"
it "get real ip 2" $
let getRealIp req = L8.fromStrict $ fromMaybe "" $ lookup "x-real-ip" (requestHeaders req)
httpWithForwardedFor url = liftIO $ do
man <- HC.newManager HC.tlsManagerSettings
oreq <- liftIO $ HC.parseUrlThrow url
let req = oreq { HC.requestHeaders = [("X-Forwarded-For", "127.0.1.1"), ("Connection", "close")] }
HC.responseBody <$> HC.httpLbs req man
waiProxyTo' getDest onError = waiProxyToSettings getDest defaultWaiProxySettings { wpsOnExc = onError, wpsSetIpHeader = SIHFromHeader }
in withMan $ \manager ->
withWApp (\r f -> f $ responseLBS status200 [] $ getRealIp r ) $ \port1 ->
withWApp (waiProxyTo' (const $ return $ WPRProxyDest $ ProxyDest "127.0.0.1" port1) defaultOnExc manager) $ \port2 ->
withCApp (rawProxyTo (const $ return $ Right $ ProxyDest "127.0.0.1" port2)) $ \port3 ->
withCApp (rawTcpProxyTo (ProxyDest "127.0.0.1" port3)) $ \port4 -> do
lbs <- httpWithForwardedFor $ "http://127.0.0.1:" ++ show port4
lbs `shouldBe` "127.0.1.1"
it "get real ip 3" $
let getRealIp req = L8.fromStrict $ fromMaybe "" $ lookup "x-real-ip" (requestHeaders req)
httpWithForwardedFor url = liftIO $ do
man <- HC.newManager HC.tlsManagerSettings
oreq <- liftIO $ HC.parseUrlThrow url
let req = oreq { HC.requestHeaders = [("Connection", "close")] }
HC.responseBody <$> HC.httpLbs req man
waiProxyTo' getDest onError = waiProxyToSettings getDest defaultWaiProxySettings { wpsOnExc = onError, wpsSetIpHeader = SIHFromHeader }
in withMan $ \manager ->
withWApp (\r f -> f $ responseLBS status200 [] $ getRealIp r ) $ \port1 ->
withWApp (waiProxyTo' (const $ return $ WPRProxyDest $ ProxyDest "127.0.0.1" port1) defaultOnExc manager) $ \port2 ->
withCApp (rawProxyTo (const $ return $ Right $ ProxyDest "127.0.0.1" port2)) $ \port3 -> do
withCApp (rawTcpProxyTo (ProxyDest "127.0.0.1" port3)) $ \port4 -> do
lbs <- httpWithForwardedFor $ "http://127.0.0.1:" ++ show port4
lbs `shouldBe` "127.0.0.1"
it "performs log action" $
let ioref :: IO (IORef Int)
ioref = newIORef 1
performLogAction :: IORef Int -> IO ()
performLogAction ref = writeIORef ref 2
waiProxyTo' getDest onError manager ref =
waiProxyToSettings
getDest
defaultWaiProxySettings
{ wpsOnExc = onError,
wpsSetIpHeader = SIHFromHeader,
wpsLogRequest = const (performLogAction ref)
}
manager
in withMan $ \manager ->
withWApp (\_ f -> f $ responseLBS status200 [] "works") $ \port1 -> do
ref <- ioref
withWApp (waiProxyTo' (const $ return $ WPRProxyDest $ ProxyDest "127.0.0.1" port1) defaultOnExc manager ref) $ \port2 ->
withCApp (rawProxyTo (const $ return $ Right $ ProxyDest "127.0.0.1" port2)) $ \port3 ->
withCApp (rawTcpProxyTo (ProxyDest "127.0.0.1" port3)) $ \port4 -> do
_ <- HC.simpleHttp $ "http://127.0.0.1:" ++ show port4
lhs <- liftIO $ readIORef ref
lhs `shouldBe` 2
{- FIXME
describe "waiToRaw" $ do
it "works" $ do
let content = "waiToRaw"
waiApp = const $ return $ responseLBS status200 [] content
rawApp = waiToRaw waiApp
withCApp (rawProxyTo (const $ return $ Left rawApp)) $ \port -> do
lbs <- HC.simpleHttp $ "http://127.0.0.1:" ++ show port
lbs `shouldBe` content
it "sends files" $ do
let content = "PONG"
fp = "pong"
waiApp = const $ return $ responseFile status200 [] fp Nothing
rawApp = waiToRaw waiApp
writeFile fp content
withCApp (rawProxyTo (const $ return $ Left rawApp)) $ \port -> do
lbs <- HC.simpleHttp $ "http://127.0.0.1:" ++ show port
lbs `shouldBe` L8.pack content
-}
|
