Bad Gateway python-telegram-bot with webhook and Nginx - django

Question

I'm trying to set up a webhook with python-telegram-bot and Nginx. I am faced with a problem, my bot doesn't get messages from telegram. I also tried to make GET/POST queries from the postman and I always get a "502 Bad Gateway" error. I also launched the netstat to monitor port 5000 where my telegram bot connects but it is always empty. It seems like webhook doesn't launch at all.
My Nginx default.conf file looks like the following:
upstream django {
server gunicorn:8000;
}
server {
listen 80;
server_name example.com www.example.com;
return 301 https://$server_name$request_uri;
}
server {
listen 443 ssl;
ssl on;
server_name example.com www.example.com;
ssl_certificate fullchain.pem;
ssl_certificate_key privkey.pem;
access_log /var/log/nginx/nginx.vhost.access.log;
error_log /var/log/nginx/nginx.vhost.error.log;
location /TELEGRAM_TOKEN {
proxy_pass http://0.0.0.0:5000/TELEGRAM_TOKEN/;
}
location /static/ {
alias /static/;
}
location / {
proxy_pass http://example.com:8000;
}
}
And my telegram client code:
updater = Updater(api_token)
updater.dispatcher.add_handler(CommandHandler('start', start))
updater.dispatcher.add_handler(CallbackQueryHandler(button))
updater.dispatcher.add_handler(MessageHandler(Filters.text & ~Filters.command, custom_command))
jq = updater.job_queue
job_minute = jq.run_repeating(callback_minute, interval=5)
#updater.start_polling()
updater.start_webhook(listen="0.0.0.0", port=5000, url_path=api_token,
webhook_url=f'https://example.com/{api_token}')
updater.idle()
I also have Django options for the Nginx server but I've never seen any tutorial or documentation on how to tune the webhook with Django and it can be the reason for my problems.
Have anyone any idea about solving my problem?

Answer 1

CallMeStag, your advice to use the following code helped me solve the issue:
print(Bot(api_token).get_webhook_info()))
I had 2 problems with the Nginx config file
First: ssl on
It gave me an error connection refused and I deleted it
Second
I changed this
location /TELEGRAM_TOKEN {
proxy_pass http://0.0.0.0:5000/TELEGRAM_TOKEN/;
}
to this
location /TELEGRAM_TOKEN {
proxy_pass http://example.com:5000/TELEGRAM_TOKEN/;
}
and the webhook is now working.
Thank you.