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https://github.com/python-telegram-bot/python-telegram-bot.git
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8690ba256e
BaseServer.handle_error() default behaviour is to print to stdout or stderr (depends on the python version). In case that the file descriptor is closed an additional exception will be raised, causing the webhook thread to quit. Fixes #970
148 lines
5 KiB
Python
148 lines
5 KiB
Python
#!/usr/bin/env python
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#
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# A library that provides a Python interface to the Telegram Bot API
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# Copyright (C) 2015-2018
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# Leandro Toledo de Souza <devs@python-telegram-bot.org>
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Lesser Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Lesser Public License for more details.
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#
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# You should have received a copy of the GNU Lesser Public License
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# along with this program. If not, see [http://www.gnu.org/licenses/].
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import logging
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from telegram import Update
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from future.utils import bytes_to_native_str
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from threading import Lock
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try:
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import ujson as json
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except ImportError:
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import json
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try:
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import BaseHTTPServer
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except ImportError:
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import http.server as BaseHTTPServer
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logging.getLogger(__name__).addHandler(logging.NullHandler())
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class _InvalidPost(Exception):
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def __init__(self, http_code):
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self.http_code = http_code
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super(_InvalidPost, self).__init__()
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class WebhookServer(BaseHTTPServer.HTTPServer, object):
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def __init__(self, server_address, RequestHandlerClass, update_queue, webhook_path, bot):
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super(WebhookServer, self).__init__(server_address, RequestHandlerClass)
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self.logger = logging.getLogger(__name__)
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self.update_queue = update_queue
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self.webhook_path = webhook_path
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self.bot = bot
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self.is_running = False
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self.server_lock = Lock()
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self.shutdown_lock = Lock()
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def serve_forever(self, poll_interval=0.5):
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with self.server_lock:
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self.is_running = True
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self.logger.debug('Webhook Server started.')
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super(WebhookServer, self).serve_forever(poll_interval)
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self.logger.debug('Webhook Server stopped.')
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def shutdown(self):
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with self.shutdown_lock:
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if not self.is_running:
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self.logger.warning('Webhook Server already stopped.')
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return
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else:
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super(WebhookServer, self).shutdown()
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self.is_running = False
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def handle_error(self, request, client_address):
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"""Handle an error gracefully."""
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self.logger.debug('Exception happened during processing of request from %s',
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client_address, exc_info=True)
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# WebhookHandler, process webhook calls
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# Based on: https://github.com/eternnoir/pyTelegramBotAPI/blob/master/
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# examples/webhook_examples/webhook_cpython_echo_bot.py
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class WebhookHandler(BaseHTTPServer.BaseHTTPRequestHandler, object):
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server_version = 'WebhookHandler/1.0'
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def __init__(self, request, client_address, server):
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self.logger = logging.getLogger(__name__)
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super(WebhookHandler, self).__init__(request, client_address, server)
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def do_HEAD(self):
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self.send_response(200)
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self.end_headers()
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def do_GET(self):
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self.send_response(200)
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self.end_headers()
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def do_POST(self):
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self.logger.debug('Webhook triggered')
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try:
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self._validate_post()
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clen = self._get_content_len()
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except _InvalidPost as e:
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self.send_error(e.http_code)
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self.end_headers()
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else:
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buf = self.rfile.read(clen)
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json_string = bytes_to_native_str(buf)
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self.send_response(200)
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self.end_headers()
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self.logger.debug('Webhook received data: ' + json_string)
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update = Update.de_json(json.loads(json_string), self.server.bot)
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self.logger.debug('Received Update with ID %d on Webhook' % update.update_id)
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self.server.update_queue.put(update)
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def _validate_post(self):
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if not (self.path == self.server.webhook_path and 'content-type' in self.headers and
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self.headers['content-type'] == 'application/json'):
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raise _InvalidPost(403)
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def _get_content_len(self):
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clen = self.headers.get('content-length')
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if clen is None:
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raise _InvalidPost(411)
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try:
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clen = int(clen)
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except ValueError:
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raise _InvalidPost(403)
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if clen < 0:
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raise _InvalidPost(403)
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return clen
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def log_message(self, format, *args):
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"""Log an arbitrary message.
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This is used by all other logging functions.
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It overrides ``BaseHTTPRequestHandler.log_message``, which logs to ``sys.stderr``.
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The first argument, FORMAT, is a format string for the message to be logged. If the format
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string contains any % escapes requiring parameters, they should be specified as subsequent
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arguments (it's just like printf!).
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The client ip is prefixed to every message.
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"""
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self.logger.debug("%s - - %s" % (self.address_string(), format % args))
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