import socket
from random import choice
import os
if 'PORT' in os.environ:
    HOST, PORT = '', int(os.environ['PORT'])
else:
    HOST, PORT = '', choice(range(4000, 10000))
listen_socket = socket.socket()
listen_socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
listen_socket.bind((HOST, PORT))
listen_socket.listen(1)
print 'Serving HTTP on port %s ...' % PORT
while True:
    client_connection, client_address = listen_socket.accept()
    request = client_connection.recv(4096)
    print request

    http_response = """
        HTTP/1.1 200 OK

        Hello, World!
                    """
    client_connection.sendall(http_response)
    client_connection.close()