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const express = require('express');
const bodyParser = require('body-parser');

const app = express();
const PORT = 3000;

// Use body-parser middleware to parse JSON and URL-encoded bodies
app.use(bodyParser.json()); // For JSON payloads
app.use(bodyParser.urlencoded({ extended: true })); // For URL-encoded payloads

// Webhook endpoint
app.post('/webhook', (req, res) => {
  console.log('Received Webhook Payload:');
  console.log('Headers:', req.headers);
  console.log('Body:', req.body);

  // You might want to do something with the payload here,
  // e.g., save to database, trigger another service, etc.

  // Respond to the sender to acknowledge receipt
  // Many services expect a 200 OK response quickly.
  res.status(200).send('Webhook received successfully!');
});

// Basic health check endpoint
app.get('/', (req, res) => {
  res.send('Webhook listener is running.');
});

app.listen(PORT, () => {
  console.log(`Webhook listener running on http://localhost:${PORT}`);
  console.log('Waiting for POST requests to /webhook');
});

// To run this code:
// 1. Make sure you have Node.js installed.
// 2. Create a new directory, e.g., `my-webhook-listener`.
// 3. Navigate into the directory and run `npm init -y`.
// 4. Install express and body-parser: `npm install express body-parser`.
// 5. Save the above code as `app.js` (or `index.js`).
// 6. Run it with `node app.js`.
// 7. You can test it using a tool like Postman or `curl`:
//    `curl -X POST -H "Content-Type: application/json" -d '{"event":"test","data":{"id":123}}' http://localhost:3000/webhook`