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webhookhandler.py
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132 lines (108 loc) · 4.69 KB
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#!/usr/bin/env python
#
# A library that provides a Python interface to the Telegram Bot API
# Copyright (C) 2015-2018
# Leandro Toledo de Souza <[email protected]>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Lesser Public License for more details.
#
# You should have received a copy of the GNU Lesser Public License
# along with this program. If not, see [http://www.gnu.org/licenses/].
import logging
from telegram import Update
from future.utils import bytes_to_native_str
from threading import Lock
try:
import ujson as json
except ImportError:
import json
from tornado.httpserver import HTTPServer
from tornado.ioloop import IOLoop
import tornado.web
import tornado.iostream
logging.getLogger(__name__).addHandler(logging.NullHandler())
class WebhookServer(object):
def __init__(self, port, webhook_app, ssl_ctx):
self.http_server = HTTPServer(webhook_app, ssl_options=ssl_ctx)
self.port = port
self.loop = None
self.logger = logging.getLogger(__name__)
self.is_running = False
self.server_lock = Lock()
self.shutdown_lock = Lock()
def serve_forever(self):
with self.server_lock:
IOLoop().make_current()
self.is_running = True
self.logger.debug('Webhook Server started.')
self.http_server.listen(self.port)
self.loop = IOLoop.current()
self.loop.start()
self.logger.debug('Webhook Server stopped.')
self.is_running = False
def shutdown(self):
with self.shutdown_lock:
if not self.is_running:
self.logger.warning('Webhook Server already stopped.')
return
else:
self.loop.add_callback(self.loop.stop)
def handle_error(self, request, client_address):
"""Handle an error gracefully."""
self.logger.debug('Exception happened during processing of request from %s',
client_address, exc_info=True)
class WebhookAppClass(tornado.web.Application):
def __init__(self, webhook_path, bot, update_queue):
self.shared_objects = {"bot": bot, "update_queue": update_queue}
handlers = [
(r"{0}/?".format(webhook_path), WebhookHandler,
self.shared_objects)
] # noqa
tornado.web.Application.__init__(self, handlers)
def log_request(self, handler):
pass
# WebhookHandler, process webhook calls
class WebhookHandler(tornado.web.RequestHandler):
SUPPORTED_METHODS = ["POST"]
def __init__(self, application, request, **kwargs):
super(WebhookHandler, self).__init__(application, request, **kwargs)
self.logger = logging.getLogger(__name__)
def initialize(self, bot, update_queue):
self.bot = bot
self.update_queue = update_queue
def set_default_headers(self):
self.set_header("Content-Type", 'application/json; charset="utf-8"')
def post(self):
self.logger.debug('Webhook triggered')
self._validate_post()
json_string = bytes_to_native_str(self.request.body)
data = json.loads(json_string)
self.set_status(200)
self.logger.debug('Webhook received data: ' + json_string)
update = Update.de_json(data, self.bot)
self.logger.debug('Received Update with ID %d on Webhook' % update.update_id)
self.update_queue.put(update)
def _validate_post(self):
ct_header = self.request.headers.get("Content-Type", None)
if ct_header != 'application/json':
raise tornado.web.HTTPError(403)
def write_error(self, status_code, **kwargs):
"""Log an arbitrary message.
This is used by all other logging functions.
It overrides ``BaseHTTPRequestHandler.log_message``, which logs to ``sys.stderr``.
The first argument, FORMAT, is a format string for the message to be logged. If the format
string contains any % escapes requiring parameters, they should be specified as subsequent
arguments (it's just like printf!).
The client ip is prefixed to every message.
"""
super(WebhookHandler, self).write_error(status_code, **kwargs)
self.logger.debug("%s - - %s" % (self.request.remote_ip, "Exception in WebhookHandler"),
exc_info=kwargs['exc_info'])