Python socket学习笔记（三）

 

之前都是客户端对服务器的单线程操作。接下来学习 SocketServer 多线程

SockServer

class SocketServer.BaseServer
SocketServer.BaseRequestHandler   The request handler class must define a new handle()


RequestHandler.Handle()
This function must do all the work required to service a request. The default implementation dose nothing.Several instance attributes are available to it; the request is available as self.request;the clinet address as self.client_address;and the server instance as self.server, in case it needs access to per-server information


RequestHandler.setup()
Called before the handle() method to perform any initialization actions required. The default implementation does nothing.


BaseServer.serve_forever(poll_interval=0.5)
Handle requesets until an explicit shutdown() request. Poll for shutdown every poll_interval seconds. Ignores self.timeout.If you need to do periodic tasks,do them in another thread.

 

多线程的连接过程：

 

 

SocketServer 例子

服务器端

import SocketServer
class MyTCPHandler(SocketServer.BaseRequestHandler):

def handle(self):
　　while 1:
　　　　self.data=self.request.recv(1024).strip()
　　　　print ("{} wrote:".format(self.client_address[0]))
　　　　if not self.data:break
　　　　self.request.sendall(self.data.upper())

if __name__ == "__main__":

　　HOST,PORT = "localhost",9999
　　server = SocketServer.ThreadingTCPServer((HOST,PORT),MyTCPHandler)
　　server.serve_forever()

 

client (也可以使用之前的客户端程序，只要改下端口即可)

import  socket,sys
HOST,PORT = "localhost",9999
data = " ".join(sys.argv[1:])

#create a socket (SOCK_STREAM means a TCP socket)
sock = socket.socket(socket.AF_INET,socket.SOCK_STREAM)

try:
    #Connect to server and send data
    sock.connect((HOST,PORT))
    sock.sendall(data + "\n")
    
    # Receive data from the server and shutdown
    received = sock.recv(1024)
finally:
    sock.close()

print("Sent: {}".format(data))
print("Received: {}".format(received)