[Haskell-beginners] Re: Strange errors in network

15 Jun 2009


      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