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|
{-# LANGUAGE ForeignFunctionInterface #-}
--------------------------------------------------------------------
-- |
-- Module : Network.Curl.Easy
-- Copyright : (c) Galois Inc 2007-2009
-- License :
--
-- Maintainer: Sigbjorn Finne <sof@galois.com>
-- Stability : provisional
-- Portability: portable
--
-- Haskell binding to the libcurl <http://curl.haxx.se/> \"easy\" API.
-- The \"easy\" API provides a higher-level, easy-to-get-started calling
-- interface to the library's wide range of features for interacting
-- with HTTP\/FTP\/etc servers.
--
--------------------------------------------------------------------
module Network.Curl.Easy
( initialize -- :: IO Curl
, perform -- :: Curl -> IO CurlCode
, setopt -- :: Curl -> CurlOption -> IO CurlCode
, duphandle -- :: Curl -> IO Curl
, reset -- :: Curl -> IO ()
, curl_global_init -- :: CInt -> IO CurlCode
, curl_global_cleanup -- :: IO ()
, curl_version_number -- :: IO Int
, curl_version_string -- :: IO String
) where
import Network.Curl.Types
import Network.Curl.Opts
import Network.Curl.Code
import Network.Curl.Post
import Network.Curl.Debug
import Data.IORef(IORef)
import Foreign.Ptr
import Foreign.Marshal.Alloc(free)
import Foreign.C.Types
import Foreign.C.String
import Control.Monad
import Data.Maybe
-- | Initialise a curl instance
initialize :: IO Curl
initialize = do
h <- easy_initialize
mkCurl h
-- XXX: Is running cleanup here OK?
reset :: Curl -> IO ()
reset hh = curlPrim hh $ \r h -> easy_reset h >> runCleanup r
duphandle :: Curl -> IO Curl
duphandle hh = curlPrim hh $ \r h ->
do h1 <- easy_duphandle h
cleanup <- shareCleanup r
mkCurlWithCleanup h1 cleanup
setopt :: Curl
-> CurlOption
-> IO CurlCode
setopt hh o = curlPrim hh $ \ r h -> unmarshallOption (easy_um r h) o
where
easy_um :: IORef OptionMap -> CurlH -> Unmarshaller CurlCode
easy_um r h =
Unmarshaller
{ u_long -- :: Int -> Long -> IO CurlCode
= \ i x -> liftM toCode $ easy_setopt_long h i x
, u_llong -- :: Int -> LLong -> IO CurlCode
= \ i x -> liftM toCode $ easy_setopt_llong h i x
, u_string -- :: Int -> String -> IO CurlCode
= \ i x -> do debug $ "ALLOC: " ++ x
c_x <- newCString x
updateCleanup r i $ debug ("FREE: "++ x) >> free c_x
liftM toCode $ easy_setopt_string h i c_x
, u_strings -- :: Int -> [String] -> IO CurlCode
= \ i x ->
do debug ("ALLOC: " ++ show x)
-- curl_slist_append will copy its string argument
let addOne ip s = withCString s $ curl_slist_append ip
ip <- foldM addOne nullPtr x
updateCleanup r i $
debug ("FREE: " ++ show x) >> curl_slist_free ip
liftM toCode $ easy_setopt_string h i (castPtr ip)
, u_ptr -- :: Int -> Ptr () -> IO a
= \ i x -> liftM toCode $ easy_setopt_ptr h i x
, u_writeFun -- :: Int -> WriteFunction -> IO a
= \ i x -> do
debug "ALLOC: WRITER"
fp <- mkWriter x
updateCleanup r i $ debug "FREE: WRITER" >> freeHaskellFunPtr fp
liftM toCode $ easy_setopt_wfun h i fp
, u_readFun -- :: Int -> ReadFunction -> IO a
= \ i x -> do
let wrapResult f a b c d = do
mb <- f a b c d
return (fromMaybe curl_readfunc_abort mb)
debug "ALLOC: READER"
fp <- mkReader (wrapResult x)
updateCleanup r i $ debug "FREE: READER" >> freeHaskellFunPtr fp
liftM toCode $ easy_setopt_rfun h i fp
, u_progressFun -- :: Int -> ProgressFunction -> IO a
= \ i x -> do
debug "ALLOC: PROGRESS"
fp <- mkProgress x
updateCleanup r i $ debug "FREE: PROGRESS" >> freeHaskellFunPtr fp
liftM toCode $ easy_setopt_fptr h i fp
, u_debugFun -- :: Int -> DebugFunction -> IO a
= \ i debFun -> do
let wrapFun fun _a b c d e =
fun hh (toEnum (fromIntegral b)) c d e >> return 0
debug "ALLOC: DEBUG"
fp <- mkDebugFun (wrapFun debFun)
updateCleanup r i $ debug "FREE: DEBUG" >> freeHaskellFunPtr fp
liftM toCode $ easy_setopt_fptr h i fp
, u_posts -- :: Int -> [HttpPost] -> IO a
= \ i x -> do
debug "ALLOC: POSTS"
p <- marshallPosts x
updateCleanup r i $ debug "FREE: POSTS" >> curl_formfree p
liftM toCode $ easy_setopt_ptr h i p
, u_sslctxt -- :: Int -> SSLCtxtFunction -> IO a
= \ i x -> do
debug "ALLOC: SSL_FUN"
p <- mkSslCtxtFun x
updateCleanup r i $ debug "FREE: SSL_FUN" >> freeHaskellFunPtr p
liftM toCode $ easy_setopt_fptr h i p
, u_ioctl_fun -- :: Int -> Ptr () -> IO a
= \ i x -> liftM toCode $ easy_setopt_ptr h i x
, u_convFromNetwork -- :: Int -> Ptr () -> IO a
= \ i x -> liftM toCode $ easy_setopt_ptr h i x
, u_convToNetwork -- :: Int -> Ptr () -> IO a
= \ i x -> liftM toCode $ easy_setopt_ptr h i x
, u_convFromUtf8 -- :: Int -> Ptr () -> IO a
= \ i x -> liftM toCode $ easy_setopt_ptr h i x
, u_sockoptFun -- :: Int -> Ptr () -> IO a
= \ i x -> liftM toCode $ easy_setopt_ptr h i x
}
perform :: Curl -> IO CurlCode
perform hh = liftM toCode $ curlPrim hh $ \_ h -> easy_perform_prim h
curl_global_init :: CInt -> IO CurlCode
curl_global_init v = liftM toCode $ curl_global_init_prim v
curl_version_number :: IO Int
curl_version_number = do
x <- curl_version_num
return (fromIntegral x)
curl_version_string :: IO String
curl_version_string = do
cs <- curl_version_str
peekCString cs
-- FFI decls
foreign import ccall
"curl_version_num" curl_version_num :: IO CInt
foreign import ccall
"curl_version_str" curl_version_str :: IO CString
foreign import ccall
"curl/easy.h curl_global_init" curl_global_init_prim :: CInt -> IO CInt
foreign import ccall
"curl/easy.h curl_global_cleanup" curl_global_cleanup :: IO ()
foreign import ccall
"curl/easy.h curl_easy_init" easy_initialize :: IO CurlH
foreign import ccall
"curl/easy.h curl_easy_perform" easy_perform_prim :: CurlH -> IO CInt
foreign import ccall
"curl_easy_duphandle" easy_duphandle :: CurlH -> IO CurlH
foreign import ccall
"curl_easy_reset" easy_reset :: CurlH -> IO ()
foreign import ccall
"curl_easy_setopt_long" easy_setopt_long :: CurlH -> Int -> Long -> IO CInt
foreign import ccall
"curl_easy_setopt_longlong" easy_setopt_llong :: CurlH -> Int -> LLong -> IO CInt
foreign import ccall
"curl_easy_setopt_string" easy_setopt_string :: CurlH -> Int -> Ptr CChar -> IO CInt
foreign import ccall
"curl_easy_setopt_ptr" easy_setopt_ptr :: CurlH -> Int -> Ptr a -> IO CInt
foreign import ccall
"curl_easy_setopt_ptr" easy_setopt_fptr :: CurlH -> Int -> FunPtr a -> IO CInt
foreign import ccall
"curl_easy_setopt_ptr" easy_setopt_wfun :: CurlH -> Int -> FunPtr WriteFunction -> IO CInt
foreign import ccall
"curl_easy_setopt_ptr" easy_setopt_rfun :: CurlH -> Int -> FunPtr ReadFunctionPrim -> IO CInt
foreign import ccall "wrapper"
mkWriter :: WriteFunction -> IO (FunPtr WriteFunction)
foreign import ccall "wrapper"
mkReader :: ReadFunctionPrim -> IO (FunPtr ReadFunctionPrim)
foreign import ccall "wrapper"
mkProgress :: ProgressFunction -> IO (FunPtr ProgressFunction)
foreign import ccall "wrapper"
mkDebugFun :: DebugFunctionPrim -> IO (FunPtr DebugFunctionPrim)
foreign import ccall "wrapper"
mkSslCtxtFun :: SSLCtxtFunction -> IO (FunPtr SSLCtxtFunction)
|
