python sockets

#client 1 cmd

C:\Users\bob\python sockets>py client.py

my message: I am first client

192.168.0.18: I am first client

C:\Users\bob\python sockets>py client.py

my message: say hello from first client

192.168.0.18: say hello from first client

I am second client

I am first client

C:\Users\bob\python sockets>py client.py

my message: I see another client is online, he should be second

192.168.0.18: I see another client is online, he should be second

How are you from second client

say hello from first client

I am second client

I am first client

-------------------------------------

#client 2 cmd

C:\Users\zchen\python sockets>py client.py

my message: I am second client

192.168.0.24: I am second client

I am first client

C:\Users\zchen\python sockets>py client.py

my message: How are you from second client

192.168.0.24: How are you from second client

say hello from first client

I am second client

I am first client

C:\Users\zchen\python sockets>py client.py

my message: There must be a client before me, he is the first

192.168.0.24: There must be a client before me, he is the first

I see another client is online, he should be second

How are you from second client

say hello from first client

I am second client

I am first client

-----------------------------

#server

C:\Users\bob\python sockets>py server.py

Connected by 192.168.0.18

Connected by 192.168.0.24

Connected by 192.168.0.18

Connected by 192.168.0.24

Connected by 192.168.0.18

Connected by 192.168.0.24

--------------------------------

#sever.py

import socket

s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

#address + port#

s.bind((socket.gethostname(), 6666))

s.listen(5)

record = ''

while True:

    conn, adr = s.accept()

    print(f"Connected by {adr[0]}")

    with conn:

        while True:

            data = conn.recv(1024)

            if not data:

                break

            record = data.decode('utf-8') + '\n' + record

            conn.sendall(bytes(f"{adr[0]}: {record}", "utf-8"))

        #conn.close()

---------------------------------

#client.py

import socket

with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:

    #connect to server address

    s.connect('192.168.0.18', 6666))

    msg = input('my message: ')

    s.send(bytes(f"{msg}", "utf-8"))

    data = s.recv(1024)

    print(data.decode("utf-8"))

 

reference:

https://www.youtube.com/watch?v=T0rYSFPAR0A

https://www.youtube.com/watch?v=3QiPPX-KeSc

https://www.youtube.com/watch?v=Lbfe3-v7yE0

https://realpython.com/python-sockets/