UseStaticFiles does not work with spaces encoded as plus signs

[miloush]

Is there an existing issue for this?

• I have searched the existing issues

Describe the bug

app.UseStaticFiles() returns 404 for file names that contain spaces and the browser requests them using + rather than %20.

Such links are easy to come across since HttpUtility.UrlEncode uses + to encode spaces. HttpUtility.UrlPathEncode which encodes spaces as %20 is documented as do not use.

Expected Behavior

The + sign to be decoded into space and the files served.

Steps To Reproduce

1. Create a new ASP.NET project
2. Put a file with space in the wwwroot folder.
3. Request it using + for space.

Exceptions (if any)

No response

.NET Version

10.0.100-rc.2.25502.107

Anything else?

Running on Microsoft.AspNetCore.App 8.0.21.