python--Network Programming-----Socket code Example

First, the basic socket example

Service side:

1 ImportSocket2 3HOST ="'4PORT = 500075 6Sock_server =Socket.socket (socket.af_inet, socket. SOCK_STREAM)7 Sock_server.bind ((HOST, PORT))8 9Sock_server.listen (1)Tenconn, addr =sock_server.accept () One  A With Conn: -     Print('Connected by', addr) -      whileTrue: thedata = CONN.RECV (1024) -         if  notData: -              Break -Conn.sendall (data)

Client:

1 ImportSocket2 3HOST ='localhost'4PORT = 500075 6Client =Socket.socket (socket.af_inet, socket. SOCK_STREAM)7 Client.connect ((HOST, PORT))8Client.sendall (b'Hello, World')9 Tendata = CLIENT.RECV (1024) One  A Print('Received', data)

Run the server and then run the client, and the client will run the result:

1 Received b'Hello,world'

II. cyclic data transmission and receiving

Service side:

1 ImportSocket2 3HOST ="'4PORT = 500075 6Sock_server =Socket.socket (socket.af_inet, socket. SOCK_STREAM)7 Sock_server.bind ((HOST, PORT))8 9Sock_server.listen (1)Tenconn, addr =sock_server.accept () One  A With Conn: -     Print('Connected by', addr) -      whileTrue: thedata = CONN.RECV (1024) -         Print("Server recv:", Conn.getpeername (), Data.decode ()) -         if  notData: -              Break +Conn.sendall (data)

Client:

1 ImportSocket2 3HOST ='localhost'4PORT = 500075 6Client =Socket.socket (socket.af_inet, socket. SOCK_STREAM)7 Client.connect ((HOST, PORT))8 9  whileTrue:Tenmsg = input (">>>:"). Strip () One     ifLen (msg) = =0: A         Continue - Client.sendall (Msg.encode ()) -  thedata = CLIENT.RECV (1024) -  -     Print('Received', Data.decode ())

First run the server, run the client, and then enter the client in turn:

Hi, hello, learn python,

The client runs the result as:

1 >>>: Hi2Received hi3 >>>: Hello 4 Hello, Received . 5 >>>: Learn python6Received Learn python7 >>>:

The server run results are:

1 Connected by ('127.0.0.1', 57473)2 server recv: (' 127.0.0.1 ', 57473) Hi3 server recv: ('127.0.0.1', 57473) Hello  4 server recv: ('127.0.0.1', 57473) Learn Python

Three, simple chat software

Service side

1 ImportSocket2 3HOST ="'4PORT = 500075 6Sock_server =Socket.socket (socket.af_inet, socket. SOCK_STREAM)7 Sock_server.bind ((HOST, PORT))8 9Sock_server.listen (1)Tenconn, addr =sock_server.accept () One  A With Conn: -     Print('Connected by', addr) -      whileTrue: thedata = CONN.RECV (1024) -         Print("Server recv:", Conn.getpeername (), Data.decode ()) -         if  notData: -              Break +  -Response = input (">>>:"). Strip () + Conn.send (Response.encode ()) A         Print("Send to Alex:", response)

Client

1 ImportSocket2 3HOST ='localhost'4PORT = 500075 6Client =Socket.socket (socket.af_inet, socket. SOCK_STREAM)7 Client.connect ((HOST, PORT))8 9  whileTrue:Tenmsg = input (">>>:"). Strip () One     ifLen (msg) = =0: A         Continue - Client.sendall (Msg.encode ()) -  thedata = CLIENT.RECV (1024) -  -     Print('Received', Data.decode ())

Run the server first, then run the client,

The client runs the result as:

1 >>>: Hi2Received Hey3 >>>: strong 4 Received Alex 5 >>>: Egon in 6Received not 7 >>>: haha 8 Received haha 9 >>>:

The server run results are:

1Connected by ('127.0.0.1', 57682)2Server recv: ('127.0.0.1', 57682) Hi3>>>: Hey4 Send to Alex:hey5Server recv: ('127.0.0.1', 57682) Strong6>>>: Alex7 Send to Alex:alex8Server recv: ('127.0.0.1', 57682is Egon in?9>>>: NotTen Send to Alex: not in OneServer recv: ('127.0.0.1', 57682) haha A>>>: Haha -Send to Alex: haha

Can you see that the above code enables simple chat functions

python--Network Programming-----Socket code Example