Network Exception
Hi, I've a problem, I'm using this code on GHC compiler version 6.4.1: --- BEGIN --- module Main where import System.IO import Network main = withSocketsDo $ do handle - connectTo localhost ( PortNumber 8080 ) hSetBuffering handle LineBuffering hClose handle --- END --- The problems is that it throws an exception at connectTo, the exception is: getServiceEntry: does not exist (no such service entry) The server and the port is correct, I have apache listening on port 8080 and if I put http://localhost:8080/ on browser it loads a web page. Do somebody knows what it happens and how to fix it? thanks. ___ Glasgow-haskell-users mailing list Glasgow-haskell-users@haskell.org http://www.haskell.org/mailman/listinfo/glasgow-haskell-users
Re: Network Exception
It looks odd to me, because the service is not particularly meaningful to the transport, and thus not a crucial piece of information. Unless I am missing something, this could be a bug in the Network module. You may want to try the lower-level stuff from Network.Socket instead. Cheers, Dinko On 10/14/05, Arias [EMAIL PROTECTED] wrote: Hi,I've a problem, I'm using this code on GHC compiler version 6.4.1:--- BEGIN ---module Main whereimport System.IOimport Networkmain = withSocketsDo $ dohandle - connectTo localhost ( PortNumber 8080 ) hSetBuffering handle LineBufferinghClose handle--- END ---The problems is that it throws an exception at connectTo, the exception is:getServiceEntry: does not exist (no such service entry) The server and the port is correct, I have apache listening on port 8080and if I put http://localhost:8080/ on browser it loads a web page.Do somebody knows what it happens and how to fix it? thanks. ___Glasgow-haskell-users mailing listGlasgow-haskell-users@haskell.org http://www.haskell.org/mailman/listinfo/glasgow-haskell-users ___ Glasgow-haskell-users mailing list Glasgow-haskell-users@haskell.org http://www.haskell.org/mailman/listinfo/glasgow-haskell-users
Re: Network Exception
Thanks for the reply. I don't know if the problem is the same, but when I try to run this code: main = withSocketsDo $ do host - getHostName putStrLn host the getHostName throws this exception: getHostName: failed (Successful WSAStartup not yet performed (WSANOTINITIALISED)) :( I'm using Windows XP Professional Sigbjorn Finne escribió: Hi, that error message is a bit confusing, to say the least: getProtocolByName identifies itself as getServiceEntry when failing. In this case, I'm quite sure, your snippet fails because (getProtocolByName tcp) isn't successful. I've no idea why your /etc/protocols doesn't contain an entry for 'tcp'. The error message in said function has now been fixed; thanks for the report. --sigbjorn - Original Message - From: Arias [EMAIL PROTECTED] To: glasgow-haskell-users@haskell.org Sent: Friday, October 14, 2005 06:47 Subject: Network Exception Hi, I've a problem, I'm using this code on GHC compiler version 6.4.1: --- BEGIN --- module Main where import System.IO import Network main = withSocketsDo $ do handle - connectTo localhost ( PortNumber 8080 ) hSetBuffering handle LineBuffering hClose handle --- END --- The problems is that it throws an exception at connectTo, the exception is: getServiceEntry: does not exist (no such service entry) The server and the port is correct, I have apache listening on port 8080 and if I put http://localhost:8080/ on browser it loads a web page. Do somebody knows what it happens and how to fix it? thanks. ___ Glasgow-haskell-users mailing list Glasgow-haskell-users@haskell.org http://www.haskell.org/mailman/listinfo/glasgow-haskell-users ___ Glasgow-haskell-users mailing list Glasgow-haskell-users@haskell.org http://www.haskell.org/mailman/listinfo/glasgow-haskell-users
Re: Network Exception
By chance are you statically linking the program? if you statically link a program on linux (and some other systems), it cannot look up hostnames, protocols, or passwd entries. you can look up the protocol number in /etc/protocols and hardcode it and use IP addresses rather than names and it should work fine. I had to use a similar workaround in the statically linked ginsu. John -- John Meacham - ⑆repetae.net⑆john⑈ ___ Glasgow-haskell-users mailing list Glasgow-haskell-users@haskell.org http://www.haskell.org/mailman/listinfo/glasgow-haskell-users
