Python TCP Client Server Example

Python TCP Client Example.py

import socket

hostname, sld, tld, port = 'www', 'integralist', 'co.uk', 80
target = '{}.{}.{}'.format(hostname, sld, tld)

# create an ipv4 (AF_INET) socket object using the tcp protocol (SOCK_STREAM)
client = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

# connect the client
# client.connect((target, port))
client.connect(('0.0.0.0', 9999))

# send some data (in this case a HTTP GET request)
client.send('GET /index.html HTTP/1.1\r\nHost: {}.{}\r\n\r\n'.format(sld, tld))

# receive the response data (4096 is recommended buffer size)
response = client.recv(4096)

print response

Python TCP Server Example.py

import socket
import threading

bind_ip = '0.0.0.0'
bind_port = 9999

server = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
server.bind((bind_ip, bind_port))
server.listen(5)  # max backlog of connections

print 'Listening on {}:{}'.format(bind_ip, bind_port)


def handle_client_connection(client_socket):
    request = client_socket.recv(1024)
    print 'Received {}'.format(request)
    client_socket.send('ACK!')
    client_socket.close()

while True:
    client_sock, address = server.accept()
    print 'Accepted connection from {}:{}'.format(address[0], address[1])
    client_handler = threading.Thread(
        target=handle_client_connection,
        args=(client_sock,)  # without comma you'd get a... TypeError: handle_client_connection() argument after * must be a sequence, not _socketobject
    )
    client_handler.start()

can anybody please explain what is going on this line of code? : " client_sock, address = server.accept() "
How the server accepting both the variables client and socket?

The socket will start listening on the port for incoming tcp connection requests, server.accept() will finish executing once it establishes a new connection with a client

how server computer get the message in cmd when client send the text to server computer

i have client computer and server computer which are connected with LAN cable. client computer has client.py file and server computer has server.py file when i am running the files in both computer then my client computer sending the text message to server computer that is good. But i want that when i run the client program the server computer get the text message in a pop box or in cmd (means i dont want to run separately server.py file in server computer it will automaitcally run when i run the client.py file) how i can do this.