Python socket C/S structure of the chat room application implementation, pythonsocket

Python socket C/S structure of the chat room application implementation, pythonsocket

Chat Room applications with Python socket C/S Structure

Server:

#! /Usr/bin/env python # coding: utf8 import socket, selectdef broadcast_data (sock, message): for socket in conn_list: if socket! = Server_socket and socket! = Sock: try: socket. send (message) failed T: socket. close () conn_list.remove (socket) if _ name _ = "_ main _": conn_list = [] recv_buffer = 4096 PORT = 9999 server_socket = socket. socket (socket. AF_INET, socket. SOCK_STREAM) server_socket.setsockopt (socket. SOL_SOCKET, socket. SO_REUSEADDR, 1) # PORT reuse. Optional server_socket.bind ('', port) server_socket.listen (99) conn_list.append (server_socket) print" Chat server started on PORT "+ str (PORT) while 1: read_sockets, write_sockets, error_sockets = select. select (conn_list, [], []) for sock in read_sockets: # create a connection if sock = server_socket: sockfd, addr = server_socket.accept () conn_list.append (sockfd) print "Client (% s, % s) connected" % addr broadcast_data (sockfd, "[% s: % s] entered room \ n" % addr) # enter the chat room else: try: data = sock. recv (recv_buffer) if data: broadcast_data (sock, "\ r" + '<' + str (sock. getpeername () + '>' + data) except: broadcast_data (sock, "Client (% s, % s) is offline" % addr) print "Client (% s, % s) is offline "% addr sock. close () conn_list.remove (sock) continue server_socket.close ()

Client:

#!/usr/bin/env python#coding:utf8import socket,select,string,sys def prompt() : sys.stdout.write('<You> ') sys.stdout.flush() if __name__ == "__main__":  if(len(sys.argv) < 3) :  print 'Usage : python chat_client.py hostname port'  sys.exit()  HOST = sys.argv[1] PORT = int(sys.argv[2])  s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) s.settimeout(2)  try :  s.connect((HOST, PORT)) except :  print 'Unable to connect'  sys.exit()  print 'Connected to remote host. Start sending messages' prompt()  while 1:  socket_list = [sys.stdin, s]   read_sockets, write_sockets, error_sockets = select.select(socket_list , [], [])   for sock in read_sockets:   if sock == s:    data = sock.recv(4096)    if not data :     print '\nDisconnected from chat server'     sys.exit()    else :     sys.stdout.write(data)     prompt()    else :    msg = sys.stdin.readline()    s.send(msg)    prompt()