How to serve index.html with web api selfhosted with OWIN

Move your Index.html to the root of your project. Then install-package Microsoft.Owin.StaticFiles in Package Manager Console and add the code below:

public class Startup
{
    public void Configuration(IAppBuilder app)
    {

        const string rootFolder = ".";
        var fileSystem=new PhysicalFileSystem(rootFolder);
        var options = new FileServerOptions
                      {
                          EnableDefaultFiles = true,
                          FileSystem = fileSystem
                       };

        app.UseFileServer(options);

    }
}

This will serve up your Index.html by default.

You can checkout Scott Allen’s blog for more reading:

http://odetocode.com/blogs/scott/archive/2014/02/10/building-a-simple-file-server-with-owin-and-katana.aspx