Quick Guide to Implementing Webhooks in Mailparser

Introduction

Hey there, fellow Javascript devs! Ready to supercharge your Mailparser integration with some real-time goodness? Webhooks are the secret sauce that'll keep your app in sync with Mailparser's parsed data. Let's dive in and get those webhooks up and running!

Prerequisites

Before we jump into the code, make sure you've got:

• A Mailparser account (duh!)
• Your API key handy
• Your RESTful API and webhook skills polished

Got all that? Great! Let's roll.

Setting Up Webhooks in Mailparser

First things first, we need to chat with the Mailparser API. It's pretty straightforward:

const axios = require('axios');

const mailparserApi = axios.create({
  baseURL: 'https://api.mailparser.io/v1',
  headers: { 'X-Api-Key': 'YOUR_API_KEY_HERE' }
});

Implementing Webhooks

Now, let's create a webhook endpoint. We'll use Express.js because, well, it's awesome:

const express = require('express');
const app = express();

app.post('/webhook', express.json(), (req, res) => {
  // We'll handle the payload here
  console.log('Webhook received:', req.body);
  res.sendStatus(200);
});

app.listen(3000, () => console.log('Webhook server running on port 3000'));

Cool, we've got our endpoint. Now, let's tell Mailparser about it:

mailparserApi.post('/webhooks', {
  url: 'https://your-domain.com/webhook',
  event: 'email_received'
})
.then(response => console.log('Webhook registered:', response.data))
.catch(error => console.error('Oops:', error));

Handling Webhook Payloads

When Mailparser sends data to your webhook, it'll look something like this:

app.post('/webhook', express.json(), (req, res) => {
  const { parsed_data, raw_data } = req.body;
  
  // Do something awesome with the data
  processEmailData(parsed_data);
  
  res.sendStatus(200);
});

Error Handling and Security

Always verify your webhooks! Here's a quick way to do it:

const crypto = require('crypto');

function verifyWebhook(payload, signature, secret) {
  const hmac = crypto.createHmac('sha256', secret);
  const digest = hmac.update(payload).digest('hex');
  return crypto.timingSafeEqual(Buffer.from(signature), Buffer.from(digest));
}

app.post('/webhook', express.raw({type: 'application/json'}), (req, res) => {
  const signature = req.headers['x-mailparser-signature'];
  
  if (!verifyWebhook(req.body, signature, 'YOUR_WEBHOOK_SECRET')) {
    return res.sendStatus(403);
  }
  
  // Process the verified webhook
  const payload = JSON.parse(req.body);
  // ...
});

Testing Your Webhook

Mailparser's got your back with a handy test feature. Use it to make sure everything's working smoothly. If things go sideways, double-check your URL and make sure your server's accessible from the outside world.

Best Practices

1. Idempotency: Handle duplicate webhooks gracefully. Use unique identifiers!
2. Retry Logic: Sometimes things fail. Be ready to retry.
3. Logging: Log everything. Future you will thank present you.

Advanced Usage

Want to get fancy? You can filter webhook events:

mailparserApi.post('/webhooks', {
  url: 'https://your-domain.com/webhook',
  event: 'email_received',
  filter: {
    subject: 'Important'
  }
})
.then(response => console.log('Filtered webhook registered:', response.data))
.catch(error => console.error('Oops:', error));

And don't forget, you can update or delete webhooks too:

mailparserApi.put('/webhooks/WEBHOOK_ID', { /* updated config */ });
mailparserApi.delete('/webhooks/WEBHOOK_ID');

Conclusion

And there you have it! You're now a Mailparser webhook wizard. Remember, webhooks are powerful stuff – they keep your app in sync and your users happy. So go forth and integrate!

Got questions? Hit up the Mailparser docs or dive into their API reference. Happy coding!