UnityFileDownloader☁️

A file downloader that handles asyncronous and concurrent file downloading, implicit multi-part file downloading, pausing/restarting, properties with per-file granularity and more.

Appendix

This file downloader was built because UnityWebRequest and recent solutions built by Unity and third-parties are subpar and bare of features. While this project is written 100% in C#, this downloader should support all platforms that Unity does. If you have any feedback, please reach out to me at jpgordon00@gmail.com, or submit an issue or pull request. Collaboration is encouraged!

Features

Concurrently download any amount of files while adhering to a fixed number of asyncronous tasks
Implicitly handles multi-part file downloading, including pausing/restarting of chunked downloads
Provides both task-based asyncronous methods and standard callbacks for errors, individual file completion, all file completion, and more
Granularity of properties can be on a per-file basis, providing the ability to pause/restart, and to get/set progress, timeouts, headers, callbacks and more
Optionally handle "atomic" file downloading by deleting all downloaded (partially or impartially) files and ability to continue downloading through HTTP/S errors
Code structure that allows for modularity of both download fulfillment (such as UnityWebRequest) and dispatching of downloads.

Usage/Examples

using UFD;
using System;

// ... in some class
public class Example
{
    async void Download()
    {
        UnityFileDownloader ufd = new UnityFileDownloader(new string[] {
            "https://wallpaperaccess.com/full/87731.jpg",
        });
        await ufd.Download();
    }

}

Issues

Unity Editor termination and application lifecycle methods do not stop this downloader from functioning.

TODO

The following features are some of which I deem to be deseriable and not currently implemented:

Dynamic chunk sizing based on download speeds
Cleanup of class structure to provide complete modularity of download fulfillment and downloader.
Provide alternative fulfillers to UnityWebRequest, perhaps unlocking better platform specific performance.

jpgordon00 / UnityFileDownloader