CommonHttpClientFactoryController.cs

using System;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Mvc;

namespace DNTCommon.Web.Core.TestWebApp.Controllers
{
    public class CommonHttpClientFactoryController : Controller
    {
        private readonly ICommonHttpClientFactory _httpClientFactory;

        public CommonHttpClientFactoryController(ICommonHttpClientFactory httpClientFactory)
        {
            _httpClientFactory = httpClientFactory;
        }

        public IActionResult Index()
        {
            return View();
        }

        public async Task<IActionResult> DownloadFile()
        {
            var host = new Uri("http://localhost:5000");
            var httpClient = _httpClientFactory.GetOrCreate(host);
            var responseMessage = await httpClient.GetAsync("CommonHttpClientFactory/Index");
            var responseContent = await responseMessage.Content.ReadAsStringAsync();
            return Content(responseContent);
        }
    }
}