Setting Up Telegram Bot on Apps Script

Tue, 22 Jul 2025 23:24:14 +0500

Here is technical side of what I did on development on Apps Script. main article

// Main webhook handler - receives all Telegram updates
function doPost(e) {
 try {
 if (!e || !e.postData) {
 return ContentService.createTextOutput('Invalid request').setMimeType(ContentService.MimeType.TEXT).setStatusCode(400);
 }

 const update = JSON.parse(e.postData.contents);

 if (update.message) {
 handleMessage(update.message);
 }

 // IMPORTANT: Always return OK with proper content type and mainly proper status code (200<=status<300) to prevent retries
 return ContentService.createTextOutput('OK').setMimeType(ContentService.MimeType.TEXT).setStatusCode(200);
 } catch (error) {
 console.error('Error in doPost:', error);
 // Even on error, return OK to prevent Telegram retries
 return ContentService.createTextOutput('OK').setMimeType(ContentService.MimeType.TEXT).setStatusCode(500);
 }
}

By the nature of apps script, doPost is used when the app received POST request. Telegram sends data via POST to webhook url. So we set up POST listener.

Telegram-Bot on Asadbek Kurbonov

Setting Up Telegram Bot on Apps Script