python--Network Programming-----Socket Code Instance--Chat software upgrade version

Service-Side code:

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)Ten  One  whileTrue: Aconn, addr =sock_server.accept () -  - With Conn: the         Print('Connected by', addr) -          whileTrue: -             Try: -data = CONN.RECV (1024) +                 Print("Server recv:", Conn.getpeername (), Data.decode ()) -                 if  notData: +                      Break A  at Conn.send (Data.upper ()) -                 Print("Send to Alex:", data) -             exceptConnectionreseterror: -                  Break

Client 1 Code:

ImportSockethost='localhost'PORT= 50007Client=Socket.socket (socket.af_inet, socket. Sock_stream) Client.connect ((HOST, PORT)) whiletrue:msg= Input (">>>:"). Strip ()ifLen (msg) = =0:ContinueClient.sendall (Msg.encode ()) Data= CLIENT.RECV (1024)    Print('Received', Data.decode ())

Client 2 Code:

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 open the server, and then turn on client 1, client 2, in the client 1 input information can receive server response information, in the client 2 input information can not receive server response information, at this time disconnect client 1, client 2 can receive the service side of the response information,

Client 1 run Result:

1 >>>: Client 12Received Client 13 >>>:4 Process finished with exit code 1

Client 2 run Result:

1 >>>: Client 22Received Client 23 >>>:

Server Run Results:

1Connected by ('127.0.0.1', 58852)2Server recv: ('127.0.0.1', 58852) Client 13Send To Alex:b'\XE5\XAE\XA2\XE6\X88\XB7\XE7\XAB\XAF1'4Connected by ('127.0.0.1', 58857)5Server recv: ('127.0.0.1', 58857) Client 26Send To Alex:b'\xe5\xae\xa2\xe6\x88\xb7\xe7\xab\xaf2'

python--Network Programming-----Socket Code Instance--Chat software upgrade version