Bryce Verdier wrote:

I would be interested in this as well. I'm trying to use Network.Curl for a personal project, also using a method_post, and am not able to get a response. Though I know it's connecting.

I _think_ that I need to use CurlWriteFunction, but I'm still new to Haskell & not sure how to work with that option.

I tried a number of times to do things with Network.Curl and found it to be a painful and frustrating experience. The API is highly irregular and often remains too close to the underlying C API. More recently I've been using the http-enumerator package which is conceptually a little more complicated but works really, really well. It does both HTTP and HTTPS, GET and POST. It currently doesn't work via a proxy, but the http-enumerator author has said he will take patches and I'm working on it. Cheers, Erik -- ---------------------------------------------------------------------- Erik de Castro Lopo http://www.mega-nerd.com/

Hi Micheal, You cannot use curlGetString to POST since it always uses GET. Here is a code snippet which I use. Although I don't use basic auth, you can add another opt to use it. {-# LANGUAGE ScopedTypeVariables #-} import Control.Exception (IOException, handle) import Control.Monad (liftM) import qualified Data.ByteString as BSS import qualified Data.ByteString.Lazy as BS import qualified Data.ByteString.Lazy.Char8 as BS8 import Data.IORef import qualified Network.Curl as Curl import Network.URI (URI) post :: URI -> BS.ByteString -> String -> IO (Maybe BS.ByteString) post uri body contentType = handleIOException (const $ return Nothing) $ Curl.withCurlDo $ do bodyRef <- newIORef [] h <- Curl.initialize mapM_ (Curl.setopt h) $ [Curl.CurlURL $ show uri, Curl.CurlNoBody False, Curl.CurlFollowLocation False, Curl.CurlMaxRedirs 0, Curl.CurlAutoReferer False, Curl.CurlUserAgent "Mozilla/5.0", Curl.CurlNoSignal True, -- Curl.CurlVerbose True, Curl.CurlPostFields [BS8.unpack body], Curl.CurlHttpHeaders ["Content-Type: " ++ contentType], Curl.CurlWriteFunction $ bodyFunction bodyRef] code <- Curl.perform h if code /= Curl.CurlOK then return Nothing else liftM (Just . BS.fromChunks . reverse) $ readIORef bodyRef bodyFunction :: IORef [BSS.ByteString] -> Curl.WriteFunction bodyFunction r = Curl.gatherOutput_ $ \s -> do bs <- BSS.packCStringLen s modifyIORef r (bs:) handleIOException :: (IOException -> IO a) -> IO a -> IO a handleIOException handler action = handle (\(e :: IOException) -> handler e) action -- Satoshi Nakamura 2011/5/12 Michael Xavier :

I've tried 3 different HTTP libraries for this project: Network.HTTP (which doesn't support SSL), Network.Curl, and http-enumerator. This project requires SSL, HTTP Basic Auth and Post. Network.HTTP does not support SSL and http-enumerator does not support HTTP basic authentication. The maintainer said he'd welcome a patch to it but I don't really have the time or skill at this stage to implement something like that. So I'm stuck with trying to coerce curl into doing what I need it to do. Hopefully someone on this list has been able to successfully POST a string body with Network.Curl

On Wed, May 11, 2011 at 6:07 PM, Erik de Castro Lopo wrote:

...

Bryce Verdier wrote:

...

I would be interested in this as well. I'm trying to use Network.Curl for a personal project, also using a method_post, and am not able to get a response. Though I know it's connecting.

I _think_ that I need to use CurlWriteFunction, but I'm still new to Haskell & not sure how to work with that option.

I tried a number of times to do things with Network.Curl and found it to be a painful and frustrating experience. The API is highly irregular and often remains too close to the underlying C API.

More recently I've been using the http-enumerator package which is conceptually a little more complicated but works really, really well. It does both HTTP and HTTPS, GET and POST. It currently doesn't work via a proxy, but the http-enumerator author has said he will take patches and I'm working on it.

Cheers, Erik -- ---------------------------------------------------------------------- Erik de Castro Lopo http://www.mega-nerd.com/

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-- Michael Xavier http://www.michaelxavier.net

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Basic auth is something I'm going to need in http-enumerator pretty

soon so I'll probably have a stab at it over the next week or two. If you're interested in that and you haven't heard back from me in say two weeks, feel free to ping me.

I have an active issue with the author of the project on github discussing this very thing: https://github.com/snoyberg/http-enumerator/issues/14#comment_1086615 I'm not really up to implementing auth quite yet but it may help you in your endeavors. Definitely keep me posted if you decide to tackle this issue. I'd definitely like to swap out the backend on my library for http-enumerator which i now greatly prefer to Network.Curl Thanks so much for the code sample Satoshi. It is a bit daunting to me as a Haskell novice but I was able to massage it into what I needed. It's unfortunate at how much more convoluted the Curl api is when you want to POST instead of GET but I suspect as others have suggested that this may have a lot to do with the underlying C API. -- Michael Xavier http://www.michaelxavier.net

Michael Xavier wrote:

I have an active issue with the author of the project on github discussing this very thing:

https://github.com/snoyberg/http-enumerator/issues/14#comment_1086615

I'm not really up to implementing auth quite yet but it may help you in your endeavors. Definitely keep me posted if you decide to tackle this issue.

I did. https://github.com/snoyberg/http-enumerator/commit/346c16607cad805e393e666e5... It should be in version 6.5 of httpenumerator which is already on Hackage. Please test it and if it works for you close the github issue. Cheers, Erik -- ---------------------------------------------------------------------- Erik de Castro Lopo http://www.mega-nerd.com/