Hey, let's break down the possible issues here—since you've already confirmed the port is open and the script is listening, let's dig into the common gotchas that trip up Webhook migrations:

First, let's verify the Webhook's actual status with Telegram's API—this is often the quickest way to spot hidden issues:

• Run this command (replace <YOUR_BOT_TOKEN> with your actual bot token):

  curl https://api.telegram.org/bot<YOUR_BOT_TOKEN>/getWebhookInfo
  

  Look for fields like last_error_message or last_error_date—Telegram will explicitly tell you why it can't send updates (e.g., SSL certificate errors, invalid URL, connection timeouts).

Check Your SSL Configuration #

Telegram requires valid, trusted SSL certificates for Webhook URLs (self-signed certs won't work unless you're using a tunnel like ngrok for local testing).

• Verify your certificate chain is complete with:

  openssl s_client -connect yourdomain.com:443
  

  Make sure there are no errors about untrusted roots or expired certificates.
• If you're using a reverse proxy (Nginx/Apache), double-check that it's configured to serve HTTPS correctly and pass full requests to your bot script.

Validate Your Bot's Request Handling #

Telegram sends updates via POST requests with JSON bodies—if your script is only listening for GET requests, it'll never process the update:

• Add logging to your script to record incoming requests (method, headers, body). For example, in Python with Flask:

  from flask import Flask, request
  
  app = Flask(__name__)
  
  @app.route('/webhook', methods=['POST'])
  def webhook():
      print(f"Received request method: {request.method}")
      print(f"Request body: {request.get_json()}")
      # Your existing command handling logic here
      return '', 200
  

  Check if you see any POST requests when sending /start—if not, the issue is with routing to your script.
• Ensure your script returns a 200 OK status code immediately after receiving the request. If Telegram doesn't get a 200, it'll retry a few times then stop sending updates entirely.

Test with a Manual Request #

Eliminate Telegram from the equation by sending a mock update directly to your Webhook URL:

curl -X POST -H "Content-Type: application/json" -d '{
  "update_id": 12345,
  "message": {
    "chat": { "id": 123456, "first_name": "Test" },
    "text": "/start"
  }
}' https://yourdomain.com/your-webhook-path

If your bot responds correctly here, the problem is likely with Telegram's ability to reach your server (go back to SSL/Webhook status checks). If not, debug your script's command handling logic for /start.

Check Reverse Proxy/Firewall Rules #

If you're using Nginx or Apache as a reverse proxy:

• Confirm the proxy is forwarding requests to your bot's listening port (e.g., if your bot runs on port 3000, your Nginx config should have proxy_pass http://localhost:3000;).
• Make sure the proxy isn't stripping the request body—add these lines to your Nginx location block if missing:

  proxy_set_header Content-Type application/json;
  proxy_pass_request_body on;
  

• Double-check that your server's firewall (UFW, iptables, cloud security groups) allows incoming HTTPS (443) traffic from all IPs—Telegram uses a range of IPs, so you can't whitelist a single one.

Verify Webhook Setup Command #

Ensure you set the Webhook correctly with the right URL and token:

curl -F "url=https://yourdomain.com/your-webhook-path" https://api.telegram.org/bot<YOUR_BOT_TOKEN>/setWebhook

Typos in the URL or token are a common mistake—run getWebhookInfo again to confirm the url field matches what you expect.

内容的提问来源于stack exchange，提问作者Rodrigo Formighieri