Python socket C/S结构的聊天室应用实现

Python socket C/S结构的聊天室应用

服务端：
#!/usr/bin/env python
#coding:utf8

import socket,select
def broadcast_data (sock,message):
for socket in conn_list:
if socket != server_socket and socket != sock :
try :
socket.send(message)
except :
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) #端口重用,可选
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:
#新建连接
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)
#进入聊天室
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()
客户端：
#!/usr/bin/env python
#coding:utf8
import 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()