When integrating with third-party services, such as payment gateways or social media APIs, webhooks and callbacks play a crucial role in enabling real-time communication and event-driven workflows.

Webhooks are HTTP callbacks that are triggered by specific events on the third-party service's side. These events could include a successful payment transaction, a new user signup, or a comment posted on a social media platform.

To handle webhooks, your application needs to expose a publicly accessible endpoint where the third-party service can send HTTP requests containing the relevant data. When a webhook event is triggered, the third-party service will make an HTTP POST request to your webhook URL, typically including a payload with information about the event.

Here's an example of an Express route that handles a webhook request:

1const express = require("express");
2const app = express();
3
4app.post("/webhook", (req, res) => {
5  const payload = req.body;
6  // Process the payload and take necessary actions
7  // ... 
8  res.sendStatus(200);
9});
10
11app.listen(3000, () => {
12  console.log("Webhook server running on port 3000");
13});

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console.log("Handling Webhooks and Callbacks");