Include .well-known folder in your asp.net core project

.well-known/acme-challenge/***not found (http 404)

If you want to use Let’s Encrypt, choose the manual way and pass the value http for the –preferred-challenges argument to generate a certificate, you may get a not found (404) HTTP response for a file inside this folder.

For my example, I created the .well-known directory inside the wwwroot directory.

To resolve this issue, you need to add the following statement:

    public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
        {
            // ...
            app.UseStaticFiles(new StaticFileOptions
            {
                FileProvider = new PhysicalFileProvider(Path.Combine(Directory.GetCurrentDirectory(), @"wwwroot/.well-known")),
                RequestPath = new PathString("/.well-known"),
                ServeUnknownFileTypes = true // serve extensionless file
            });
            // ...
        }

You should add this configuration statement after the line app.UseStaticFiles();.

This statement requires adding a few using directives:

• using System.IO;
• using Microsoft.Extensions.FileProviders;
• using Microsoft.AspNetCore.Http

The folder may not appear in Visual Studio. You can add the following configuration lines to the csproj file of your project:

    <ItemGroup>
        <Content Include="wwwroot\.well-known\acme-challenge\**" />
    </ItemGroup>