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server side socket program hangs

anuradha.k.r at sify.com anuradha.k.r at sify.com
Wed Oct 15 02:25:58 EDT 2003 
hi,
i've posted my doubt on my server program written in python.i am not
able to communicate with any client.My server program does not even
create a socket.can someone tell me what the problem is?
thanx,
AKR


anuradha.k.r at sify.com wrote in message news:<57efaf35.0310132112.6ecd9840 at posting.google.com>...
> hi,
> My one problem is solved,python server no more hangs,but my main
> purpose still remains unsolved,my client is not able to establish
> connection.my client is a C program running on a windows machine.On
> running the python program,in the python shell i get this way
> >>>
> (cursor)
> 
> i assumed my server is waiting for a connection,but my client did not
> connect,it failed.
>      I tried debugging the python program using the step by step debug
> control.it moves till def __init__(Self,parent):
> and stops(seems to be waiting).It does not move to the next line.
> Can you tell me what is happening? and what is the problem with my
> server program?Sorry for the trouble,
> thanx
> AKR.
> 
> 
> 
> 
> 
> 
> 
> 
> 
> "Anthony McDonald" <tonym1972/at/club-internet/in/fr> wrote in message news:<3f8670c7$0$12567$7a628cd7 at news.club-internet.fr>...
> > <anuradha.k.r at sify.com> wrote in message
> > news:57efaf35.0310092102.1231b120 at posting.google.com...
> > > hi,
> > >   was stuck with another work.now bac to python program.
> > > i tried out using
> > > PORT = socket.htons(9999)
> > >
> > > it still doesn't work.here is the code.it still hangs.can some one
> > > tell me what could be te problem?
> > >
> > > #from socket import *
> > > import socket
> > > import sys
> > >
> > > HOST = ''       #any address
> > > PORT = socket.htons(9222)        #same port address as client
> > >
> > > class Sock:
> > >      def __init__ (self,parent):
> > >           try:
> > >                self.s = socket(AF_INET,SOCK_STREAM)
> > >           except socket.error:
> > >                 print 'socket not created'
> > >           try:
> > >                self.s.bind((HOST,PORT))
> > >           except self.error:
> > >                print 'error in bind'
> > >           try:
> > >                self.s.listen(5)
> > >           except self.error:
> > >                print 'error in listen'
> > >           conn, addr = self.s.accept()
> > >              #  print 'Connected by',`addr`
> > >           while 1:
> > >                data = conn.recv(1024)
> > >                if not data: break
> > >                conn.send(data)
> > >           conn.close()
> > >
> > > thanx,
> > > AKR.
> > >
> > Sorry for my brief answer last time, but I had hoped the code fragment I
> > posted would explain what was happening with your code.
> > 
> > Your code is almost a verbatum copy of the Python example, except you've
> > chosen to massage the port value using the HTONS function. So for most
> > architectures the port value 9999 or 9222 would be changed to somewhere in
> > the 3xxx port range. Any client trying to connect on those ports will fail.
> > Hence you noted success on a C server which isn't using that function, but
> > failure on your Python server which is. The solution is to just assign the
> > port value you want unchanged.
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