asp.net core - How to serve static file with no extension

Question

ASP.NET Core hapily serves up files from the wwwroot folder based on the mime type of the file. But how do I get it serve up a file with no extension?

As an example, Apple require that you have an endpoint in your app /apple-app-site-association for some app-intergration. If you add a text file called apple-app-site-association into your wwwroot it won't work.

Some things I've tried:

1) Provide a mapping for when there's no extension:

var provider = new FileExtensionContentTypeProvider();
provider.Mappings[""] = "text/plain";
app.UseStaticFiles(new StaticFileOptions
            {
                ContentTypeProvider = provider
            });

2) Adding an app rewrite:

var options = new RewriteOptions()
.AddRewrite("^apple-app-site-association","/apple-app-site-association.txt", false)

Neither work, the only thing that does work is a .AddRedirect which I'd rather not use if possible.

Answer 1

Adding an alternative solution. You have to set ServeUnknownFileTypes to true and after that set the default content type.

        app.UseStaticFiles(new StaticFileOptions
        {
            ServeUnknownFileTypes = true,
            DefaultContentType = "text/plain"
        });