undownload

A universal download utility for Node.js. It provides a simple and flexible interface to download files from the internet using different protocols. Its driver-based approach allows you to use different protocols with the same underlying syntax and functionality. This package was inspired by unstorage.

Features

• 🌐 Multi-protocol download support — Seamlessly handle downloads over HTTP, HTTPS, FTP, and SFTP.
• 🔁 Resumable downloads — Automatically resume interrupted downloads without starting over.
• ⚡ Asynchronous downloading — Built on async/await for non-blocking, concurrent operations.
• 🧩 Checksum validation — Verify file integrity using MD5, SHA1, SHA256, or custom hash algorithms.
• 📏 File size verification — Compare local and remote file sizes to ensure complete downloads.
• 💾 Stream-based architecture — Efficient memory usage even with large files.
• 🧠 Promise-based API — Clean, modern, and easy to integrate with any Node.js application.
• 📦 Lightweight dependency footprint — Optimized for speed and minimal package size.
• 🧰 Extensible design — Add your own protocols, validation methods, or custom download logic easily.

Usage

Install the package:

# ✨ Auto-detect (supports npm, yarn, pnpm, deno and bun)
npx nypm install @nextlvlup/undownload

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⚙️ Note: To enable protocol-specific downloads, make sure to install the required optional dependencies:

• For FTP support, install the ftp package.
• For SFTP support, install the ssh2-sftp-client package.

These modules are not installed by default to keep the core library lightweight.

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Example:

import { createDownload } from "@nextlvlup/undownload";
import httpDriver from "@nextlvlup/undownload/drivers/http";
// import ftpDriver from "@nextlvlup/undownload/drivers/ftp";
// import sftpDriver from "@nextlvlup/undownload/drivers/sftp";

const download = createDownload({
  immediate: false, // Default: true -> Download starts automatically
  base: "~/Downloads",
  key: "BigBuckBunny.mp4",
  driver: httpDriver({
    url: "http://commondatastorage.googleapis.com/gtv-videos-bucket/sample/BigBuckBunny.mp4",
  }),
});

download.on("end", () => console.log("Download completed"));
download.on("error", (err) => console.error("Download error:", err));
download.on("data", (chunk) => console.log("Downloaded chunk:", chunk.length));

download.start(); // To start the download if immediate = false
download.stop(); // To stop the download if needed
download.status(); // To check the status
download.remove(); // Discards already downloaded data

await download.promise; // To await the completion of the download

// To validate the file after completion
await download.validate(
  "sha256",
  "1cadc5e09cbb81044e256f9fc67090fcf86d7a596145eb615844fe15341451e6",
);

Development

local development

• Clone this repository
• Install latest LTS version of Node.js
• Enable Corepack using corepack enable
• Install dependencies using pnpm install
• Run interactive tests using pnpm dev

License

Published under the MIT license. Made by community 💛

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🤖 auto updated with automd