Reading and Writing Data Using the Fastly API

Hey there, fellow JavaScript devs! Ready to dive into the world of Fastly API? Let's get our hands dirty with some data syncing for user-facing integrations. Buckle up!

Setting Up the Fastly API Client

First things first, let's get that API client up and running. It's as easy as:

npm install fastly

Now, let's configure and authenticate:

const fastly = require('fastly');

const client = fastly('your-api-key-here');

Reading Data from Fastly

Time to fetch some data! Here's how you can grab service configs and cache stats:

async function fetchServiceConfig(serviceId) {
  const config = await client.getServiceDetails(serviceId);
  console.log(config);
}

async function getCacheStats(serviceId) {
  const stats = await client.getStats(serviceId);
  console.log(stats);
}

Writing Data to Fastly

Writing is just as simple. Let's update a VCL and purge some content:

async function updateVCL(serviceId, vclContent) {
  await client.updateVCL(serviceId, 'main', vclContent);
}

async function purgeContent(url) {
  await client.purgeIndividual(url);
}

Syncing Data for User-Facing Integration

Now for the main event - syncing data in real-time:

async function syncData(serviceId, userData) {
  try {
    await updateVCL(serviceId, generateVCL(userData));
    await purgeContent(`/user/${userData.id}`);
  } catch (error) {
    console.error('Sync failed:', error);
    // Implement retry logic here
  }
}

Optimizing API Usage

Let's make it snappy with some caching and batch operations:

const cache = new Map();

async function optimizedSync(serviceId, userDataBatch) {
  if (cache.has(serviceId)) {
    // Use cached data
  } else {
    const config = await fetchServiceConfig(serviceId);
    cache.set(serviceId, config);
  }

  const updates = userDataBatch.map(userData => updateVCL(serviceId, generateVCL(userData)));
  await Promise.all(updates);

  const purges = userDataBatch.map(userData => purgeContent(`/user/${userData.id}`));
  await Promise.all(purges);
}

Monitoring and Logging

Keep an eye on those API calls:

function logApiCall(method, endpoint, response) {
  console.log(`${method} ${endpoint}: ${response.status}`);
  // Send to your logging service
}

Security Considerations

Remember, keep those API keys safe! Use environment variables and access control:

const apiKey = process.env.FASTLY_API_KEY;
// Never hardcode or expose your API key

Wrapping Up

And there you have it! You're now equipped to read and write data like a pro using the Fastly API. Remember to keep an eye on rate limits, handle errors gracefully, and always prioritize security.

Keep coding, keep learning, and may your cache always be warm! 🚀