HTTP-4000.0.5: A library for client-side HTTP

Portabilitynon-portable (not tested)
MaintainerSigbjorn Finne <>



An easy access TCP library. Makes the use of TCP in Haskell much easier. This was originally part of Gray's\/Bringert's HTTP module.

  • Changes by Robin Bate Boerop - Made dependencies explicit in import statements. - Removed false dependencies from import statements. - Removed unused exported functions.
  • Changes by Simon Foster: - Split module up into to separate Network.[Stream,TCP,HTTP] modules



data Connection Source

The Connection newtype is a wrapper that allows us to make connections an instance of the Stream class, without ghc extensions. While this looks sort of like a generic reference to the transport layer it is actually TCP specific, which can be seen in the implementation of the 'Stream Connection' instance.


openTCPPort :: String -> Int -> IO ConnectionSource

openTCPPort uri port establishes a connection to a remote host, using getHostByName which possibly queries the DNS system, hence may trigger a network connection.

isConnectedTo :: Connection -> String -> IO BoolSource

Checks both that the underlying Socket is connected and that the connection peer matches the given host name (which is recorded locally).

class BufferType bufType => HStream bufType whereSource


openStream :: String -> Int -> IO (HandleStream bufType)Source

readLine :: HandleStream bufType -> IO (Result bufType)Source

readBlock :: HandleStream bufType -> Int -> IO (Result bufType)Source

writeBlock :: HandleStream bufType -> bufType -> IO (Result ())Source

close :: HandleStream bufType -> IO ()Source

data StreamHooks ty Source




hook_readLine :: (ty -> String) -> Result ty -> IO ()
hook_readBlock :: (ty -> String) -> Int -> Result ty -> IO ()
hook_writeBlock :: (ty -> String) -> ty -> Result () -> IO ()
hook_close :: IO ()


Eq ty => Eq (StreamHooks ty)