Building a File Uploader with Node.js

node.js-uploaderWhether you’re building a blog, image gallery, dashboard, file host, etc.. chances are you’ll be needing a way to upload files via your web application. In this tutorial we’ll be looking at how to build a file uploader that uses AJAX. It will consist of a simple HTML + JavaScript front end to allow the user to select multiple files at once and a NodeJS backend to handle the file upload sent via the HTML form.

The AJAX requests allow us to upload multiple files and display their progress without having to reload the page or navigate away from it.

We will be using a NodeJS module called formidable which is a fast, easy to use, and well-tested form data parser. It is also capable of handling multiple file uploads in the same request which is perfect for our purposes.
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