88 lines
2.9 KiB
Haskell
88 lines
2.9 KiB
Haskell
{-# LANGUAGE OverloadedStrings #-}
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{-# LANGUAGE RecordWildCards #-}
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-- | TLS connection to mongodb
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module Database.MongoDB.Internal.Tls
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(
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connect,
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)
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where
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import Data.IORef
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import Data.Monoid
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import Data.Text (Text)
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import qualified Data.Text as Text
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import qualified Data.ByteString as ByteString
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import qualified Data.ByteString.Lazy as Lazy.ByteString
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import Data.Default.Class (def)
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import Control.Applicative ((<$>))
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import Control.Exception (bracketOnError)
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import Control.Monad (when, unless)
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import System.IO
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import Database.MongoDB (Pipe)
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import Database.MongoDB.Internal.Protocol (newPipeWith)
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import Database.MongoDB.Internal.Connection (Connection(Connection))
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import qualified Database.MongoDB.Internal.Connection as Connection
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import System.IO.Error (mkIOError, eofErrorType)
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import qualified Network
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import qualified Network.TLS as TLS
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import qualified Network.TLS.Extra.Cipher as TLS
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import qualified Control.IO.Region as Region
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-- | Connect to mongodb using TLS
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connect :: Text -> Int -> IO Pipe
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connect host port = bracketOnError Region.open Region.close $ \r -> do
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handle <- Region.alloc_ r
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(Network.connectTo (Text.unpack host)
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(Network.PortNumber $ fromIntegral port))
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hClose
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let params = (TLS.defaultParamsClient (Text.unpack host) "")
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{ TLS.clientSupported = def
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{ TLS.supportedCiphers = TLS.ciphersuite_all}
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, TLS.clientHooks = def
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{ TLS.onServerCertificate = \_ _ _ _ -> return []}
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}
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context <- Region.alloc_ r
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(TLS.contextNew handle params)
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TLS.contextClose
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TLS.handshake context
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conn <- tlsConnection context (Region.close r)
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newPipeWith conn
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tlsConnection :: TLS.Context -> IO () -> IO Connection
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tlsConnection ctx close = do
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restRef <- newIORef mempty
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return Connection
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{ Connection.read = \count -> let
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readSome = do
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rest <- readIORef restRef
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writeIORef restRef mempty
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if ByteString.null rest
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then TLS.recvData ctx
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else return rest
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unread = \rest ->
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modifyIORef restRef (rest <>)
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go acc n = do
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-- read until get enough bytes
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chunk <- readSome
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when (ByteString.null chunk) $
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ioError eof
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let len = ByteString.length chunk
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if len >= n
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then do
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let (res, rest) = ByteString.splitAt n chunk
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unless (ByteString.null rest) $
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unread rest
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return (acc <> Lazy.ByteString.fromStrict res)
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else go (acc <> Lazy.ByteString.fromStrict chunk) (n - len)
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eof = mkIOError eofErrorType "Database.MongoDB.Internal.Connection"
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Nothing Nothing
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in Lazy.ByteString.toStrict <$> go mempty count
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, Connection.write = TLS.sendData ctx . Lazy.ByteString.fromStrict
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, Connection.flush = TLS.contextFlush ctx
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, Connection.close = close
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}
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