Proxying telegram updates to local webserver using nginx

bot.py

import telebot
import flask

from credentials import token, host, port, DEBUG

API_TOKEN = token

WEBHOOK_HOST = host
WEBHOOK_PORT = port
WEBHOOK_URL_BASE = "https://%s" % (WEBHOOK_HOST)
WEBHOOK_URL_PATH = "/%s/" % (API_TOKEN)

bot = telebot.AsyncTeleBot(API_TOKEN)
app = flask.Flask(__name__)


# Empty webserver index, return nothing, just http 200
@app.route('/', methods=['GET', 'HEAD'])
def index():
    return ''


# Process webhook calls
@app.route('/', methods=['POST'])
def webhook():
    if flask.request.headers.get('content-type') == 'application/json':
        json_string = flask.request.get_data().decode('utf-8')
        update = telebot.types.Update.de_json(json_string)
        bot.process_new_updates([update])
        return ''
    else:
        flask.abort(403)


### --- Bot's logic there --- ###


bot.remove_webhook()
if DEBUG:
    bot.skip_pending = True
    bot.polling()
else:
    bot.set_webhook(url=WEBHOOK_URL_BASE + WEBHOOK_URL_PATH)

    # Start flask server
    app.run(host='127.0.0.1', port=WEBHOOK_PORT, debug=True)

some_nginx.config

location /API_TOKEN/ {
            proxy_pass         http://127.0.0.1:WEBHOOK_PORT/;
            proxy_redirect     off;
            proxy_set_header   Host $host;
            proxy_set_header   X-Real-IP $remote_addr;
            proxy_set_header   X-Forwarded-For $proxy_add_x_forwarded_for;
            proxy_set_header   X-Forwarded-Host $server_name;
        }