Hey Andrew, let's tackle your two Telegram Bot needs one by one—first the auto-reply for /start, then the big one: streamlining the connection flow so users don't have to jump between your site and Telegram just to trigger /start.

This is a quick win. Depending on how you're running your bot, here are two straightforward implementations:

Using a Bot Library (e.g., python-telegram-bot) #

If you're using a library to manage your bot, define a handler for the /start command that sends your welcome message instantly. Here's a Python example:

from telegram import Update
from telegram.ext import ApplicationBuilder, CommandHandler, ContextTypes

async def handle_start(update: Update, context: ContextTypes.DEFAULT_TYPE):
    # Send your welcome message
    await update.message.reply_text("感谢您连接我们的Bot")

if __name__ == '__main__':
    # Replace with your bot token
    app = ApplicationBuilder().token("YOUR_BOT_TOKEN").build()
    
    # Attach the /start handler
    start_handler = CommandHandler('start', handle_start)
    app.add_handler(start_handler)
    
    # Run the bot (polling works for small-scale bots; use webhooks for production)
    app.run_polling()

Direct API Calls (No Libraries) #

If you're handling updates manually via getUpdates, whenever you detect an update where message.text == "/start", send a reply using the sendMessage endpoint:

POST https://api.telegram.org/bot<YOUR_BOT_TOKEN>/sendMessage
Content-Type: application/json

{
    "chat_id": "<USER_CHAT_ID>",
    "text": "感谢您连接我们的Bot"
}

Your current workflow with getUpdates is unreliable (it can miss updates if multiple users interact at once) and clunky for users. Instead, use Telegram's deep linking system to create a seamless one-click connection from your website. Here's the step-by-step solution:

Step 1: Create a Deep Link for Your Bot #

Generate a deep link that opens your bot and passes a unique identifier for the logged-in user on your site. The format looks like this:

https://t.me/YOUR_BOT_USERNAME?start=YOUR_WEBSITE_USER_ID

When a user clicks this link, Telegram will automatically send the command /start YOUR_WEBSITE_USER_ID to your bot—no manual input needed from the user.

Step 2: Modify the /start Handler to Store User Mappings #

Update your bot's /start handler to extract the website user ID from the command arguments, then save the mapping between your site's user ID and the Telegram chat ID to your database. Example with python-telegram-bot:

async def handle_start(update: Update, context: ContextTypes.DEFAULT_TYPE):
    # Send the welcome message first
    await update.message.reply_text("感谢您连接我们的Bot")
    
    # Extract the website user ID from the command payload
    if context.args:
        website_user_id = context.args[0]
        telegram_chat_id = update.effective_chat.id
        
        # Save this mapping to your database (e.g., website_user_id → telegram_chat_id)
        # Replace this print statement with your actual DB logic
        print(f"Saved mapping: Website User {website_user_id} → Telegram Chat {telegram_chat_id}")

Step 3: Add the Connect Button to Your Website #

On your site, add a button labeled "Connect Telegram Bot" that redirects users to the deep link you generated. Make sure to replace YOUR_WEBSITE_USER_ID with the actual ID of the user logged into your site.

Step 4: Send Notifications Later #

When you need to send a notification to a user from your website, just look up their Telegram chat ID from your database using their website user ID, then call the sendMessage API:

POST https://api.telegram.org/bot<YOUR_BOT_TOKEN>/sendMessage
Content-Type: application/json

{
    "chat_id": "<STORED_TELEGRAM_CHAT_ID>",
    "text": "Your custom notification message here"
}

Why This Works Better #

• No user back-and-forth: Users click the button on your site, are taken to Telegram (where /start triggers automatically), then can return to your site right away.
• Reliable mapping: The payload ensures you always know which website user matches which Telegram chat ID—no more guessing with getUpdates.
• Scalable: This approach works for hundreds or thousands of users, unlike getUpdates which is better suited for testing small bots.

Bonus: Stay On-Site with Telegram Web Apps #

If you want users to never leave your website, use Telegram's Web App feature:

1. Enable Web Apps for your bot via BotFather.
2. Add a button on your site that opens the Telegram Web App.
3. Use the Telegram.WebApp.initData object to retrieve the user's chat ID and send it back to your server.
4. Store the mapping and send notifications as usual.

内容的提问来源于stack exchange，提问作者Andrew waterwave