python2.7_2.2_在套接字服务器上使用ForkingMixIn

Linux系统下才能用本程序。因为有Frok新的进程。。。。

代码如下：

# -*- coding: utf-8 -*-

import os
import socket
import threading
import SocketServer

SERVER_HOST = 'localhost'
SERVER_PORT = 0
BUF_SIZE = 1024
ECHO_MSG = 'Hello echo server!'

class ForkingClient():
    """一个客户端用来测试forking server"""

    def __init__(self, ip, port):
        self.sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        self.sock.connect((ip, port))

    def run(self):
        """客户端playing with服务器"""
        # 发送数据到服务端
        current_process_id = os.getpid()
        print 'PID %s Sending echo message to the server:"%s"' % (current_process_id, ECHO_MSG)
        sent_data_length = self.sock.send(ECHO_MSG)
        print 'Sent:%d characters, so far ...' % sent_data_length

        # 显示服务端回应
        response = self.sock.recv(BUF_SIZE)
        print 'PID %s received:%s' % (current_process_id, response[5:])

    def shutdown(self):
        """清空客户端套接字"""
        self.sock.close()

class ForkingServerRequestHandler(SocketServer.BaseRequestHandler):
    def handle(self):
        # 发送回显回客户端
        data = self.request.recv(BUF_SIZE)
        current_process_id = os.getegid()
        response = '%s:%s' % (current_process_id, data)
        print 'Server sending response [current_process_id:data] = [%s]' %response
        self.request.send(response)
        return

class ForkingServer(SocketServer.ForkingMixIn,
                    SocketServer.TCPServer,
                    ):
    pass

def main():
    server = ForkingServer((SERVER_HOST, SERVER_PORT), ForkingServerRequestHandler)
    ip, port = server.server_address
    server_thread = threading.Thread(target=server.serve_forever)
    server_thread.setDaemon(True)
    server_thread.start()
    print 'Server loop running PID:%s' % os.getpid()

    client1 = ForkingClient(ip, port)
    client1.run()

    client2 = ForkingClient(ip, port)
    client2.run()

    server.shutdown()

    client1.shutdown()
    client2.shutdown()
    server.socket.close()

if __name__ == '__main__':
    main()