Example for Client socket that try to connect to the server for 2 seconds

Question

Someone can add to my Example under, the code that define the Client socket try to connect to the server for 2 seconds please ? I read about that and i don't successful to do that, because of that i ask for an example.

Example:

Client:

import socket

TCP_IP = '127.0.0.1'

TCP_PORT = 7777

BUFFER_SIZE = 1024

MESSAGE = "Hello, World!"

s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

s.connect((TCP_IP, TCP_PORT))

s.send(MESSAGE)

data = s.recv(BUFFER_SIZE)

s.close()

print "received data:", data

Server:

import socket

TCP_IP = '127.0.0.1'

TCP_PORT = 7777

BUFFER_SIZE = 20


s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

s.bind((TCP_IP, TCP_PORT))

s.listen(1)

conn, addr = s.accept()

print 'Connection address:', addr

while 1:

    data = conn.recv(BUFFER_SIZE)

    if not data: break

    print "received data:", data

    conn.send(data)

conn.close()

Thank you.

We need to see your server-side code as well. I ran your code, and the obvious result was a complaint about lack of server-side program. — Yotam, Jul 13 '13 at 14:28

score 1 · Answer 1 · answered Jul 14 '13 at 05:18

Instead of having two separate python files, you can have a single file but put the server and client in separate threads. sys.stdout.write is used instead of print due some concurrency issue with print being buffered (it mixes strings).

import threading
import socket
import sys

class socket_server(threading.Thread):
    TCP_IP = "127.0.0.1"
    TCP_PORT = 7777
    BUFFER_SIZE = 20
    daemon = True

    def run(self):
        s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        s.bind((self.TCP_IP, self.TCP_PORT))
        s.listen(1)

        conn, addr = s.accept()
        (ip, port) = addr

        sys.stdout.write("%s connection address: IP %s on Port %d\n" % (self.__class__.__name__, ip, port))

        data = True
        while data:

            data = conn.recv(self.BUFFER_SIZE)

            if data:
                sys.stdout.write("%s received data: %s\n" % (self.__class__.__name__, data))
                send_data = data.upper()
                sys.stdout.write("%s sending data: %s\n" % (self.__class__.__name__, send_data))
                conn.send(send_data)

        conn.close()

class socket_client(threading.Thread):
    TCP_IP = "127.0.0.1"
    TCP_PORT = 7777
    BUFFER_SIZE = 1024
    TIMEOUT = 2.0
    MESSAGE = "Hello, World!"

    def run(self):
        s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        s.settimeout(self.TIMEOUT)
        s.connect((self.TCP_IP, self.TCP_PORT))
        sys.stdout.write("%s sending data: %s\n" % (self.__class__.__name__, self.MESSAGE))
        s.send(self.MESSAGE)

        data = s.recv(self.BUFFER_SIZE)

        s.close()

        if data:
            sys.stdout.write("%s received data: %s\n" % (self.__class__.__name__, data))

server = socket_server()
client = socket_client()

server.start()
client.start()

Can you clarify if you want it to try to connect for 2 seconds or connect and hold the connection for 2 seconds ? — dilbert, Jul 15 '13 at 04:56
If that's the case, then it should work according to http://docs.python.org/2/library/socket.html#socket.socket.settimeout. And it does for me. Possibly there are other issues? — dilbert, Jul 15 '13 at 05:38
What Operating System and version of Python are you running? — dilbert, Jul 15 '13 at 11:21
So its failing to connect? It could be a firewall blocking ports. — dilbert, Jul 15 '13 at 22:16

Example for Client socket that try to connect to the server for 2 seconds

1 Answers1