[Python] Python TCP sockets headers

I need to create a communication between a client and a server with TCP. But I'd like to send and work with "headers". So from the client I'd like to send a header "COMMAND1" and the server returns me something.

I have the following code:

Server

import socket
import threading

bind_ip = '0.0.0.0'
bind_port = 9998

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('Response1!'.encode('utf-8'))
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()


Client

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', 9998))

# send some data (in this case a HTTP GET request)
client.send('hi'.encode('utf-8'))

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

print (response)


Anyone knows the best way to return "Response1!" when the header is "COMMAND1" and "Response2!" when the header is "COMMAND2"?

I can't find examples on how to use headers

EDIT: It doesn't have to be "COMMAND1" or "COMMAND2" it can be a "0" or "1", or anything else.

Continue reading...