[Haskell-beginners] Re: Strange errors in network

[Maciej Piechotka]

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: <socket: 6>: 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
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