原文请见:http://www.cnblogs.com/wupeiqi/articles/5040823.html
这里就是自己简单整理一下:
#!/usr/bin/env python # -*- coding:utf-8 -*- import SocketServer class MyServer(SocketServer.BaseRequestHandler): def handle(self): # print self.request,self.client_address,self.server conn = self.request conn.sendall('欢迎致电 10086,请输入1xxx,0转人工服务.') Flag = True while Flag: data = conn.recv(1024) if data == 'exit': Flag = False elif data == '0': conn.sendall('通过可能会被录音.balabala一大推') else: conn.sendall('请重新输入.') if __name__ == '__main__': server = SocketServer.ThreadingTCPServer(('127.0.0.1',8009),MyServer) server.serve_forever()
程序先运行server的一个实例,socket.server.ThreadingTCPServer的构造方法,
server继承ThreadingMixIn, TCPServer这两个类,构造方法只有TCPServer的类有并且继承其父类BaseServer的构造方法。
TCPSever的构造方法(这个构造方法会执行bind和listen):
def __init__(self, server_address, RequestHandlerClass, bind_and_activate=True): """Constructor. May be extended, do not override.""" BaseServer.__init__(self, server_address, RequestHandlerClass) self.socket = socket.socket(self.address_family, self.socket_type) if bind_and_activate: try: self.server_bind() self.server_activate() except: self.server_close() raise
BaseServer的构造方法:
def __init__(self, server_address, RequestHandlerClass): """Constructor. May be extended, do not override.""" self.server_address = server_address self.RequestHandlerClass = RequestHandlerClass self.__is_shut_down = threading.Event() self.__shutdown_request = False
在BaseServer中的构造方法中MyServer类赋给了实例的属性RequestHandlerClass ,相当于server实例有了这个属性。server实例创建完成。
然后是执行server的server_forever方法,
接下来就是BaseServer的server_forever方法->BaseServer的_handle_request_noblock方法->ThreadingMixIn的process_request方法(TCPServer和ThreadingMixIn都有这个方法,但ThreadingMixIn优先级高所以是ThreadMixIn的这个方法)->ThreadingMixIn的process_request_thread方法(这时候是多线程中的一个线程的具体处理方法了)
def process_request_thread(self, request, client_address): """Same as in BaseServer but as a thread. In addition, exception handling is done here. """ try: self.finish_request(request, client_address) self.shutdown_request(request) except: self.handle_error(request, client_address) self.shutdown_request(request)
->BaseServer的finish_request方法(调用实例的这个方法,这个方法ThreadMixIn中没有BaseServer中有,这时候会执行RequestHandlerClass的构造方法也就是我们写的MyServer的构造方法,但是MyServer中没有需要MyServer的父类中查找)
def finish_request(self, request, client_address): """Finish one request by instantiating RequestHandlerClass.""" self.RequestHandlerClass(request, client_address, self)
->BaseRequestHandler的构造方法
def __init__(self, request, client_address, server): self.request = request self.client_address = client_address self.server = server self.setup() try: self.handle() finally: self.finish()
这上面finish,setup都是空的,handle是MyServer中定义的,这几个方法都需要我们自定义,
->MyServer的handle方法
->TcpServer的shutdown_request方法
->TcpServer的close_request方法
def close_request(self, request): """Called to clean up an individual request.""" request.close()
这里request一直是client端的socket,到这里就关闭socket了算是完成了一次处理。