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DIYcat

Reverse Proxy Telegram Alert With Cloudflare Workers

·146 words·1 min
DIYcat
Author
DIYcat
Table of Contents

Preparation
#

  • Telegram Bot Token
  • Cloudflare account

Telegram Bot Token
#

You can obtain the token from BotFather

screenshot

Cloudflare Workers
#

Create a new worker and enter a name and the following worker.js content:

const whitelist = ["/botxxxxxxxxxx:"];
const tg_host = "api.telegram.org";

addEventListener("fetch", (event) => {
  event.respondWith(handleRequest(event.request));
});

function validate(path) {
  for (var i = 0; i < whitelist.length; i++) {
    if (path.startsWith(whitelist[i])) return true;
  }
  return false;
}

async function handleRequest(request) {
  var u = new URL(request.url);
  u.host = tg_host;
  if (!validate(u.pathname))
    return new Response("Unauthorized", {
      status: 403,
    });
  var req = new Request(u, {
    method: request.method,
    headers: request.headers,
    body: request.body,
  });
  const result = await fetch(req);
  return result;
}
  • Replace "/botxxxxxxxxxx:" with the numerical part of your Telegram Bot Token, then save and deploy.
  • You can also customize the domain. If you encounter a 403 error, you can try opening the Cloudflare IP whitelist.