How Can I Efficiently Download Files in Node.js?

How to Efficiently Download Files Using Node.js

In Node.js, there are multiple ways to download files. However, if you don't require third-party libraries, you can rely on the built-in features or leverage the Fetch API.

Using the Fetch API (Node 18 or Later)

As of Node 18, the fetch global is available. It implements the Fetch API, enabling you to download data with built-in methods to work with the result as plain text, JSON, or binary data (as ArrayBuffer).

Leveraging HTTP Requests

For older versions of Node, you can create an HTTP GET request and pipe its response into a writable file stream using code similar to the example below:

const http = require('http'); // or 'https' for https:// URLs
const fs = require('fs');

const file = fs.createWriteStream("file.jpg");
const request = http.get(
  "http://i3.ytimg.com/vi/J---aiyznGQ/mqdefault.jpg",
  function (response) {
    response.pipe(file);

    // Close the file stream after download is complete
    file.on("finish", () => {
      file.close();
      console.log("Download Completed");
    });
  }
);

Handling Command Line Arguments

If you need to gather information from the command line, consider using a tool like Commander.

Additional Resources

• [Node.js Download File Explanation](https://sebhastian.com/nodejs-download-file/)

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