[Haskell-beginners] Re: Strange errors in network

On Sat, 2009-06-13 at 02:01 +0200, Maciej Piechotka wrote:

I have problems with my nntp library (http://code.haskell.org/nntp/). If I try to list command it seems to fail.

Test code:

...

(c,p) <- connectToHost "news.example.com" Nothing forGroups c (System.IO.putStrLn . groupName) *** Exception: : Data.ByteString.hGetLine: end of file

Conncection by telnet (according to wireshark): -> SYN <- SYN, ACK -> ACK <- NNTP Helo Message -> ACK

Connection by Haskell: -> SYN <- SYN ACK -> ACK <- NNTP Helo Message -> ACK <- FIN ACK (after 10 s) -> ACK

If I try to run by hand the commands in ghci I get mixed results (sometimes works sometimes it fails).

Apparently I needed to flush the stream despite having line buffering. Regards