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Exception-free timeout functions #31

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nikita-volkov opened this issue Oct 5, 2014 · 0 comments

nikita-volkov commented Oct 5, 2014

I suggest to use MonadPlus instances instead of throwing IOError. E.g.:

fromSocketTimeout :: (MonadIO m, MonadPlus m) => Int -> Socket.Socket -> Int -> Producer' BS m ()
fromSocketTimeout wait sock nbytes = loop where
    loop = do
       mbs <- liftIO (timeout wait (Network.Socket.ByteString.recv sock nbytes))
       case mbs of
          Just bs
           | ByteString.null bs -> return ()
           | otherwise -> yield bs >> loop
          Nothing -> mzero

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