def __init__(self, host, port, root, whitelist):
"""Create a server that serves from root on host:port.
Only paths in the root directory that are also present in the whitelist
will be served. The whitelist paths are absolute, so they must begin
with a slash. The paths '/', '/index.html', and '/404.html' must be
included for the website to work properly.
"""
self.httpd = pywsgi.WSGIServer((host, port), self.handle_request)
self.url = "http://{}:{}".format(host, port)
self.root = root.rstrip('/')
self.whitelist = whitelist
self.running = False
self.controller = Controller()
