Twisted HTTP server example with vhosts and HTTPS

vhost.py

# -*- coding: utf-8 -*-
"""
Usage: twistd -ny vhost.py
"""

from __future__ import absolute_import, division, unicode_literals, print_function

import os

from twisted.application import internet, service
from twisted.internet import reactor, ssl
from twisted.web import vhost, server
from twisted.web.static import File
from twisted.web.wsgi import WSGIResource

from flask import Flask, current_app, request


PRIVATE_KEY = b"""
-----BEGIN PRIVATE KEY-----
...
-----END PRIVATE KEY-----
"""

PUBLIC_KEY = b"""
-----BEGIN CERTIFICATE-----
...
-----END CERTIFICATE-----
"""

CA_BUNDLE_PEM = b"""
-----BEGIN CERTIFICATE-----
...
-----END CERTIFICATE-----
-----BEGIN CERTIFICATE-----
...
-----END CERTIFICATE-----
-----BEGIN CERTIFICATE-----
...
-----END CERTIFICATE-----
"""
certificate = ssl.PrivateCertificate.loadPEM(os.linesep.join([PRIVATE_KEY, PUBLIC_KEY]))
ca_bundle = ssl.Certificate.loadPEM(CA_BUNDLE_PEM)


default, flask1, flask2 = Flask('default'), Flask('flask1'), Flask('flask2')

@default.route('/')
@flask1.route('/')
@flask2.route('/')
def index():
    return 'I am {} responding to {}'.format(current_app.name, request.url)


vhosts = vhost.NameVirtualHost()
vhosts.default = WSGIResource(reactor, reactor.getThreadPool(), default)
vhosts.addHost('example.com', File(b'/tmp'))
vhosts.addHost('exmaple.org', WSGIResource(reactor, reactor.getThreadPool(), flask1))
vhosts.addHost('example.net', WSGIResource(reactor, reactor.getThreadPool(), flask2))

application = service.Application('vhost Testing')
http = internet.TCPServer(8000, server.Site(vhosts))
http.setServiceParent(application)
https = internet.SSLServer(4443, server.Site(vhosts), ssl.CertificateOptions(
    privateKey=certificate.privateKey.original,
    certificate=certificate.original,
    extraCertChain=[
        ca_bundle.original,
    ],
))
https.setServiceParent(application)