The socket module in Python

python network programming without socket module

1. Simple use of the socket module to develop a simple command-line tool for example, as follows

1.1 Socket client-side code

1 #-*-coding:utf-8-*-2 #Author:wong Du3 4 ImportSocket5 6 #Create a Socket object7Client =Socket.socket ()8 #establish a connection to the server side9Client.connect (('localhost', 9494) )Ten  One  A  whileTrue: -     #Get user Input -Cli_send = input (">>:"). Strip () the     #Determine if user input is empty -     ifLen (cli_send) = =0: -         Continue -  +     #send data to server side, must be bytes type -Client.send (Cli_send.encode (encoding="Utf-8")) +  A     #receive server-side returned data, 102400 of the size of the received data atdata = CLIENT.RECV (102400) -     #to view the data received -     Print(Data.decode ()) -  - #Close Connection -Client.close ()

1.2 Socket server-side code

#-*-coding:utf-8-*-#Author:wong DuImportOSImportSocket#Create a socket connectionServer =Socket.socket ()#bind the appropriate IP and port numberServer.bind (('localhost', 9494) )#start listening, 5 to monitor the maximum number of connectionsServer.listen (5)Print("I'm going to start listening.")#wait for the request to connect, stuck; Conn is the connection object, addr is the connection identityPrint("waiting for client to request connection ~ ~") conn, addr=server.accept ()Print("Receive client connection, identity is:", addr) whileTrue:#receives the command sent by the client, 1024 is the size of the received datadata = CONN.RECV (1024)    #executes the command and receives the command to return the resultres =Os.popen (Data.decode ()). Read ()#if the command has no return result    if  notRes:res='Invalid command.'    #Send command return result to client, data must be bytes typeConn.send (Res.encode (encoding='Utf-8'))#Close ConnectionServer.close ()

The socket module in Python