Python socket client and service side handshake detailed description

This article mainly for you in detail the Python socket client and service side handshake, with a certain reference value, interested in small partners can refer to

Simple learning to use the socket to establish a connection between the client and the server and send the data

1. Client socketclient.py Code

Import socket  s = socket.socket (socket.af_inet, socket. SOCK_STREAM) # Establish connection: S.connect ((' 127.0.0.1 ', 9999)) # Receive Welcome message: print (S.RECV (1024x768). Decode (' Utf-8 ')) for data in [B ' Michael ' , B ' Tracy ', B ' Sarah ':  # Send data:  s.send (data)  print (S.RECV (1024x768). Decode (' Utf-8 ')) S.send (b ' exit ') s.close ()

2. Service-side serversocket.py code

Import Socket Import threading import time # from threading import Thread   s = socket.socket (socket.af_inet, socket. SOCK_STREAM) # Listening Port: S.bind ((' 127.0.0.1 ', 9999)) S.listen (5) print (' Waiting for connection ... ')  def tcplink (SOCK, Addr):  print (' Accept new connection from%s:%s ... '% addr)  sock.send (b ' welcome! ')  While True:   data = SOCK.RECV (1024x768)   time.sleep (1)   if not data or Data.decode (' utf-8 ') = = ' exit ':    break< C9/>sock.send (' Hello,%s! '% data.decode (' Utf-8 ')). Encode (' Utf-8 '))  sock.close ()  print (' Connection from %s:%s closed. '% addr) while  True:  # accepts a new connection:  sock, addr = S.accept ()  # Create a new thread to handle the TCP connection:  t = Threa Ding. Thread (Target=tcplink, args= (sock, addr))  T.start ()

3. Operation Process

Open two console windows, run server Python3 serversocket.py first

Then run the client Python3 socketclient.py

The socket connection is as follows