python--Network Programming-----Socket Programming Example--call--plus link loop

One, code example

Service side:

1 ImportSocket2 3 4Phone =Socket.socket (socket.af_inet, socket. SOCK_STREAM)5Phone.setsockopt (socket. Sol_socket, SOCKET. SO_REUSEADDR, 1)6Phone.bind (('127.0.0.1', 8080))#0-65535:0-1024 for operating system use7Phone.listen (5)8 9 Print('starting .....')Ten  whileTrue:#Link Loops Oneconn, client_addr =phone.accept () A     Print(CLIENT_ADDR) -  -      whileTrue:#Communication Cycle the         Try: -data = CONN.RECV (1024) -             if  notData#for Linux operating systems -                  Break +             Print('client-side data', data) -  + Conn.send (Data.upper ()) A         exceptConnectionreseterror:#for Windows operating systems at              Break -  - conn.close () -  -Phone.close ()

Client 1

1 ImportSocket2 3 #1. Buy Mobile phone4Phone =Socket.socket (socket.af_inet, socket. SOCK_STREAM)5 #print (phone)6 7 #2. Dialing8Phone.connect (('127.0.0.1', 8080))9 Ten #3. Send and receive Messages One  whileTrue: Amsg = input ('>>:'). Strip () -     if  notmsg: -         Continue thePhone.send (Msg.encode ('Utf-8')) -data = PHONE.RECV (1024) -     Print(data) -  + #4. Close -Phone.close ()

Client 2

1 ImportSocket2 3 #1. Buy Mobile phone4Phone =Socket.socket (socket.af_inet, socket. SOCK_STREAM)5 #print (phone)6 7 #2. Dialing8Phone.connect (('127.0.0.1', 8080))9 Ten #3. Send and receive Messages One  whileTrue: Amsg = input ('>>:'). Strip () -     if  notmsg: -         Continue thePhone.send (Msg.encode ('Utf-8')) -data = PHONE.RECV (1024) -     Print(data) -  + #4. Close -Phone.close ()

After the link loop, the server can provide services to client 1 and client 2 in turn, but can serve only one client and cannot provide services in parallel

python--Network Programming-----Socket Programming Example--call--plus link loop