Extend examples with aiohttp

examples/webhook_examples/README.md

@@ -1,6 +1,6 @@
 # Webhook examples using pyTelegramBotAPI
 
-There are 3 examples in this directory using different libraries:
+There are 4 examples in this directory using different libraries:
 
 * **Python (CPython):** *webhook_cpython_echo_bot.py*
   * **Pros:**
@@ -33,4 +33,13 @@ There are 3 examples in this directory using different libraries:
     * They don't recommend to use it with Python 3, but may work.
     * May be a oversized for just handling webhook petitions.
     
-*Latest update of this document: 2015-10-06*
+* **aiohttp (1.2.0):** *webhook_aiohttp_echo_bot.py*
+  * **Pros:**
+    * It's a web application framework
+    * Python 3 compatible
+    * Asynchronous, excellent perfomance
+    * Utilizes new async/await syntax
+  * **Cons:**
+    * Requires Python 3.4.2+, don't work with Python 2
+
+*Latest update of this document: 2017-01-30*

examples/webhook_examples/webhook_aiohttp_echo_bot.py

@@ -0,0 +1,88 @@
+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+
+# This is a simple echo bot using decorators and webhook with aiohttp
+# It echoes any incoming text messages and does not use the polling method.
+
+import logging
+import ssl
+
+from aiohttp import web
+
+import telebot
+
+
+API_TOKEN = '<api_token>'
+
+WEBHOOK_HOST = '<ip/host where the bot is running>'
+WEBHOOK_PORT = 8443  # 443, 80, 88 or 8443 (port need to be 'open')
+WEBHOOK_LISTEN = '0.0.0.0'  # In some VPS you may need to put here the IP addr
+
+WEBHOOK_SSL_CERT = './webhook_cert.pem'  # Path to the ssl certificate
+WEBHOOK_SSL_PRIV = './webhook_pkey.pem'  # Path to the ssl private key
+
+# Quick'n'dirty SSL certificate generation:
+#
+# openssl genrsa -out webhook_pkey.pem 2048
+# openssl req -new -x509 -days 3650 -key webhook_pkey.pem -out webhook_cert.pem
+#
+# When asked for "Common Name (e.g. server FQDN or YOUR name)" you should reply
+# with the same value in you put in WEBHOOK_HOST
+
+WEBHOOK_URL_BASE = "https://{}:{}".format(WEBHOOK_HOST, WEBHOOK_PORT)
+WEBHOOK_URL_PATH = "/{}/".format(API_TOKEN)
+
+
+logger = telebot.logger
+telebot.logger.setLevel(logging.INFO)
+
+bot = telebot.TeleBot(API_TOKEN)
+
+app = web.Application()
+
+
+# Process webhook calls
+async def handle(request):
+    if request.match_info.get('token') == bot.token:
+        request_body_dict = await request.json()
+        update = telebot.types.Update.de_json(request_body_dict)
+        bot.process_new_updates([update])
+        return web.Response()
+    else:
+        return web.Response(status=403)
+
+app.router.add_post('/{token}/', handle)
+
+
+# Handle '/start' and '/help'
+@bot.message_handler(commands=['help', 'start'])
+def send_welcome(message):
+    bot.reply_to(message,
+                 ("Hi there, I am EchoBot.\n"
+                  "I am here to echo your kind words back to you."))
+
+
+# Handle all other messages
+@bot.message_handler(func=lambda message: True, content_types=['text'])
+def echo_message(message):
+    bot.reply_to(message, message.text)
+
+
+# Remove webhook, it fails sometimes the set if there is a previous webhook
+bot.remove_webhook()
+
+# Set webhook
+bot.set_webhook(url=WEBHOOK_URL_BASE+WEBHOOK_URL_PATH,
+                certificate=open(WEBHOOK_SSL_CERT, 'r'))
+
+# Build ssl context
+context = ssl.SSLContext(ssl.PROTOCOL_TLSv1_2)
+context.load_cert_chain(WEBHOOK_SSL_CERT, WEBHOOK_SSL_PRIV)
+
+# Start aiohttp server
+web.run_app(
+    app,
+    host=WEBHOOK_LISTEN,
+    port=WEBHOOK_PORT,
+    ssl_context=context,
+)