python_basic_threaded_tcp_server.py

'''
Basic Python Threaded TCP Server
--------------------------------
socketserver.TCPServer requires only two things:
 - Address (host, port)
 - Handler class to process requests
   Must be derived from `BaseRequestHandler` or `StreamRequestHandler`
'''

from socketserver import TCPServer
from socketserver import ThreadingMixIn
from socketserver import BaseRequestHandler

class Handler(BaseRequestHandler):
    # Overwrite handle method to process request
    def handle(self):
        # In simple case we hope request will fit in 4096 bytes
        request = self.request.recv(4096)
        # Bare minimum HTTP-response
        response = (
            'HTTP/1.1 200 OK\r\n'
            'Content-Type: text/html; charset=UTF-8\r\n\r\n'
            '<h1>It Works!</h1>'
        ).encode()
        # Sending back to the client
        self.request.send(response)

# We can make our server threaded by subclassing ThreadingMixIn
class Server(ThreadingMixIn, TCPServer):
    allow_reuse_address = True
    daemon_threads = True

try:
    server = Server(('', 8000), Handler)
    server.serve_forever()

except KeyboardInterrupt:
    server.shutdown()