"Our aim is to solve the problem of unreliable file uploads once and for all. tus is a new open protocol for resumable uploads built on HTTP. It offers simple, cheap and reusable stacks for clients and servers. It supports any language, any platform and any network." - https://tus.io

tusdotnet is a .NET server implementation of the tus.io protocol that runs on .NET Framework, .NET Standard, .NET 6 and later.

• Runs on .NET Framework, .NET Standard 1.3+ and .NET 6+ using OWIN or ASP.NET Core
• Full support for tus 1.0.0 including all major extensions (checksum, checksum-trailers, concatenation, creation, creation-with-upload, upload-defer-length, expiration and termination)
• Experimental support for IETF's Resumable Uploads For Http (see branch POC/tus2)
• Fast and reliable
• Easy to configure
• Customizable data storage with built-in disk storage (TusDiskStore) and community stores for Azure Blob Storage and S3-compatible storage (AWS S3, MinIO, Cloudflare R2, etc.)
• MIT licensed

dotnet add package tusdotnet

using tusdotnet;

var builder = WebApplication.CreateBuilder(args);
var app = builder.Build();

app.MapTus("/files", async httpContext => new()
{
    // This method is called on each request so different configurations can be returned per user, domain, path etc.
    // Return null to disable tusdotnet for the current request.

    // Where to store data?
    Store = new tusdotnet.Stores.TusDiskStore(@"C:\tusfiles\"),
    Events = new()
    {
        // What to do when the file is completely uploaded?
        OnFileCompleteAsync = async eventContext =>
        {
            var file = await eventContext.GetFileAsync();

            await QueueForProcessing(file);
        }
    }
});

Depending on your infrastructure you might also need to configure Kestrel, IIS or other reverse proxies.

More options, events and middleware usage are available on the wiki.

Clone the repo and run one of the test sites. They each launch a small site running tusdotnet and the official JS client so that you can test the protocol on your own machine.

tus.io keeps a list of clients for a number of different platforms (Android, Java, JS, iOS etc). tusdotnet should work with all of them as long as they support version 1.0.0 of the protocol.

This project is licensed under the MIT license, see LICENSE.