In ASP.NET Core how do you check if request is local?

Question

In the regular ASP.NET you could do this in a view to determine if the current request was from localhost:

HttpContext.Current.Request.IsLocal

B

Answer 1

At the time of writing HttpContext.Connection.IsLocal is now missing from .NET Core.

Other working solution checks only for a first loopback address (::1 or 127.0.0.1) which might not be adequate.

I find the solution below useful:

using Microsoft.AspNetCore.Http;
using System.Net;

namespace ApiHelpers.Filters
{
    public static class HttpContextFilters
    {
        public static bool IsLocalRequest(HttpContext context)
        {
            if (context.Connection.RemoteIpAddress.Equals(context.Connection.LocalIpAddress))
            {
                return true;
            }
            if (IPAddress.IsLoopback(context.Connection.RemoteIpAddress))
            {
                return true;
            }
            return false;
        }
    }
}

And the example use case:

app.UseWhen(HttpContextFilters.IsLocalRequest, configuration => configuration.UseElmPage());