How Can I Make Multiple Asynchronous HTTP Requests in Node.js for My Express App?

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Making Multiple HTTP Requests

Using Promises

Here’s a simple example:

[[See Video to Reveal this Text or Code Snippet]]

In the example above, three requests are made using the axios library, which simplifies the process of making HTTP calls. Each request is initiated simultaneously, and once all three have completed, their responses are combined and sent back to the client.

Using Async/Await

Using async/await syntax simplifies reading and writing asynchronous code. Instead of chaining .then() and .catch(), you can use try and catch blocks, making it clearer and easier to manage.

In the previous example, the async function with await halts execution until the requests resolve but allows for the simultaneous execution of the HTTP requests.

Error Handling

Robust error handling is critical when making multiple asynchronous requests. As shown in the above snippet, wrapping your requests in a try...catch block will allow you to handle errors gracefully. If any of the requests fail, the catch block will execute to inform the user appropriately.

Conclusion

If your application requires data from multiple sources, implementing these strategies will allow for a streamlined and efficient data retrieval process.