def __init__(self,
proxy_url,
proxy_port,
proxy_username,
proxy_password,
listen_host=None,
listen_port=3129,
buffer_size=4096):
self.proxy_url = proxy_url
self.proxy_port = proxy_port
self.proxy_username = proxy_username
self.proxy_password = proxy_password
self.listen_host = listen_host or ''
self.listen_port = listen_port
self.buffer_size = buffer_size
self.credentials = b64encode('{}:{}'.format(self.proxy_username,
self.proxy_password))
self.running = False
self.worker_thread = threading.Thread(target=self._worker_thread)
self.worker_thread.daemon = True
self.addr_resolver = PFResolver()
