python s.send > c tcpServer

donnied · 01-22-2008, 06:08 AM

I am trying to send data to a simple tcpServer ( from pont.net/sockets) using the Python.

The connection is established but the tcpserver doesn't show any data being sent. It's waiting for something.
I tried s.send("7/r/n/") but I believe it wants an end of line / end of buffer statement, and that the connection should then be closed.

I tried s.close() but then it just froze up.

The code for the tcpclient (that I know) sends what's needed has :

send(sd, argv[i], strlen(argv[i]) + 1, 0)

but I'm not sure how to interpret it.

donnied · 02-02-2008, 06:26 PM

s.send( "9\0", 0) is what was needed to send a 9,
s.send( "3\0", 0) to send a 3, etc.

rubadub · 02-02-2008, 10:59 PM

where's your connect code?

donnied · 02-09-2008, 02:25 AM

Code:

#!/usr/bin/env python

import socket

…

Code:

def togglebutton1_pressed(self, widget):
                s.send( "1\0", 0)
                print "7"

…

Code:

s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect(('127.0.0.1', 1500))

I still have to manually edit the IP address to connect to. I would like in future to scan for/ or prompt the user for the IP address.

nc3b · 02-09-2008, 02:47 AM

Not really good at python, but I think you should be flushing the data..:-?

rubadub · 02-09-2008, 02:53 AM

if I remember correctly you need to provide 's', possibly two ways?

Code:

def togglebutton1_pressed(self, widget):
                global s
                s.send( "1\0", 0)
                print "7"

or

Code:

def togglebutton1_pressed(self, widget):
                self.s.send( "1\0", 0)
                print "7"

depending on how and where you declare s.

(p.s. I may be very wrong, lol, but I can't see rest of code!)

donnied · 02-09-2008, 02:59 AM

How do you mean 'flush the data'? Client side, I was relying on the built in garbage collection. Server side the program is a C echo server, do you think it needs some additional info?

nc3b · 02-09-2008, 03:06 AM

I don't know about python very well, but generally, to ensure that data is sent immediately, one must flush it. For instance, in C you would create a file stream from your socket and then you would write to that file. To make sure it sent it, you would call fflush. Again, I don't know if this is the case with your program. Another thing I suggest is trying to connect with telnet to your server. See what happens. If it doesn't work from there either then you know the problem is on the otherside. Cheers

donnied · 02-09-2008, 10:52 AM

The program was working fine. The second posting of mine was just to show how I fixed the problem.

Thank you.