Fork processes to handle TCP requests.

sock_fork.py

import os
import socket


def main():
    sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)

    sock.bind(('127.0.0.1', 9999))
    sock.listen()

    os.fork()
    while True:
        sock_req, addr = sock.accept()

        payload = b''
        while True:
            data = sock_req.recv(4096)
            if not data:
                break

            payload += data

            print(os.getpid(), str(payload, 'utf-8'))
            sock_req.sendall(
                b'HTTP/1.1 200 OK\r\n'
                + b'Date: Sun, 18 Oct 2012 10:36:20 GMT\r\n'
                + b'Server: Apache/2.2.14 (Win32)\r\n'
                + b'Content-Length: 0\r\n'
                + b'Connection: Closed\r\n'
                + b'Content-Type: text/html;\r\n'
            )
        sock_req.shutdown(socket.SHUT_WR)
        sock_req.close()


if __name__ == '__main__':
    main()