Node Tactics

Web Development

Node.js File Uploads

Handling File Uploads

Node.js file uploads use multer for multipart/form-data.

Introduction to File Uploads in Node.js

Handling file uploads is a common requirement in web applications. In Node.js, the Multer middleware is a popular choice for handling multipart/form-data, which is used for uploading files.

Setting Up Multer

First, you need to install multer using npm by running the following command:

Once installed, you can set up Multer in your Node.js application. Below is a basic example of how to configure Multer to handle file uploads.

Handling Multiple File Uploads

Multer also supports uploading multiple files. To handle multiple files, you can use the upload.array() method. Here's an example:

Configuring File Size Limits

To prevent users from uploading excessively large files, you can configure file size limits in Multer. This is done by setting the limits option.

Conclusion and Best Practices

File uploads are an essential feature for many applications. Using Multer in Node.js simplifies this process and provides a robust solution for handling multipart/form-data. Always validate the uploaded files for security purposes, such as checking mime types and sanitizing file names.

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