1 #!/usr/bin/env python
   2 import threading
   3 import socket
   4 import sys
   5 import os
   6 import signal
   7 
   8 class ClientThread(threading.Thread):
   9 
  10     def __init__(self,cl_socket,group):
  11         threading.Thread.__init__(self)
  12         self.cl_socket=cl_socket
  13         self.f=self.cl_socket.makefile()
  14         self.group=group
  15         self.tell_lock=threading.Lock()
  16 
  17     def run(self):
  18         while True:
  19             self.f.write('Name:')
  20             self.f.flush()
  21             self.name=self.f.readline().strip()
  22             if self.name:
  23                 break
  24         self.group.add(self)
  25         for line in self.f:
  26             self.group.tell_others(self,line)
  27         self.group.remove(self)
  28         self.f.close()
  29         # self.cl_socket.shutdown(socket.SHUT_RDWR)
  30         self.cl_socket.close()
  31 
  32 
  33     def tell(self,what):
  34         self.tell_lock.acquire()
  35         self.f.write(what)
  36         self.f.flush()
  37         self.tell_lock.release()
  38 
  39 class ClientGroup(object):
  40 
  41     def __init__(self):
  42         self.clients=[]
  43         self.clients_lock=threading.Lock()
  44 
  45     def add(self,client):
  46         self.clients_lock.acquire()
  47         self.clients.append(client)
  48         self.clients_lock.release()
  49         self.tell_others(client,'* entered the room *\n')
  50 
  51 
  52     def remove(self,client):
  53         self.clients_lock.acquire()
  54         self.clients.remove(client)
  55         self.clients_lock.release()
  56         self.tell_others(client,'* left the room *\n')
  57 
  58     def tell_others(self,client,line):
  59         what=client.name+"> "+line
  60         for other in self.clients:
  61             other.tell(what)
  62 
  63 s=socket.socket(socket.AF_INET,socket.SOCK_STREAM)
  64 s.setsockopt(socket.SOL_SOCKET,socket.SO_REUSEADDR,1)
  65 # Naviazeme ho na port 2222 pre vsetky lokalne adresy
  66 s.bind(('',2222))
  67 # Najviac 5 spojeni bude cakat vo fronte
  68 s.listen(5)
  69 
  70 # Toto je kvoli tomu, aby nam nezostavali zombie 
  71 # procesy a neprerusoval nas signal SIGCHLD
  72 signal.signal(signal.SIGCHLD,signal.SIG_IGN)
  73 
  74 group=ClientGroup()
  75 try:
  76     while True:
  77         connected_socket,address=s.accept()
  78         print 'Connected by',address
  79         client=ClientThread(connected_socket,group)
  80         client.setDaemon(True)
  81         client.start()
  82         del client
  83 except KeyboardInterrupt:
  84     pass
  85 s.shutdown(socket.SHUT_RDWR)
  86 s.close()