iot/projects/Infrastructure/Extensions/UrlHelperExtensions.cs

using Microsoft.AspNetCore.Mvc;
using System;
using System.Globalization;

namespace Infrastructure.Extensions
{
    public static class UrlHelperExtensions
    {
        public static string GetFullUrl(this IUrlHelper url, string visualPath)
        {
            if (url is null)
            {
                throw new ArgumentNullException(nameof(url));
            }
            if (string.IsNullOrEmpty(visualPath))
            {
                return visualPath;
            }
            var request = url.ActionContext.HttpContext.Request;
            if (visualPath.StartsWith("~", StringComparison.Ordinal))
            {
                return string.Format(CultureInfo.InvariantCulture, "{0}://{1}{2}", request.Scheme, request.Host, url.Content(visualPath));
            }
            else if (visualPath.StartsWith("/", StringComparison.Ordinal))
            {
                return string.Format(CultureInfo.InvariantCulture, "{0}://{1}{2}", request.Scheme, request.Host, visualPath);
            }
            return visualPath;
        }

        public static string FullAction(this IUrlHelper helper, string action = null, string controller = null, object values = null, string scheme = null, string host = null)
        {
            if (helper is null)
            {
                throw new ArgumentNullException(nameof(helper));
            }
            return helper.Action(action, controller, values, scheme ?? helper.ActionContext.HttpContext.Request.Scheme, host);
        }
    }
}