转移.net core 3.1，为.NET 5做准备

OpenAuth.Identity/Quickstart/Home/ErrorViewModel.cs

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+// Copyright (c) Brock Allen & Dominick Baier. All rights reserved.
+// Licensed under the Apache License, Version 2.0. See LICENSE in the project root for license information.
+
+
+using IdentityServer4.Models;
+
+namespace OpenAuth.IdentityServer.Quickstart.Home
+{
+    public class ErrorViewModel
+    {
+        public ErrorViewModel()
+        {
+        }
+
+        public ErrorViewModel(string error)
+        {
+            Error = new ErrorMessage { Error = error };
+        }
+
+        public ErrorMessage Error { get; set; }
+    }
+}

OpenAuth.Identity/Quickstart/Home/HomeController.cs

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+// Copyright (c) Brock Allen & Dominick Baier. All rights reserved.
+// Licensed under the Apache License, Version 2.0. See LICENSE in the project root for license information.
+
+
+using System.Threading.Tasks;
+using IdentityServer4.Services;
+using Microsoft.AspNetCore.Authorization;
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.Extensions.Hosting;
+using Microsoft.Extensions.Logging;
+
+namespace OpenAuth.IdentityServer.Quickstart.Home
+{
+    [SecurityHeaders]
+    [AllowAnonymous]
+    public class HomeController : Controller
+    {
+        private readonly IIdentityServerInteractionService _interaction;
+        private readonly IHostEnvironment _environment;
+        private readonly ILogger _logger;
+
+        public HomeController(IIdentityServerInteractionService interaction, IHostEnvironment environment, ILogger<HomeController> logger)
+        {
+            _interaction = interaction;
+            _environment = environment;
+            _logger = logger;
+        }
+
+        public IActionResult Index()
+        {
+            if (_environment.IsDevelopment())
+            {
+                // only show in development
+                return View();
+            }
+
+            _logger.LogInformation("Homepage is disabled in production. Returning 404.");
+            return NotFound();
+        }
+
+        /// <summary>
+        /// Shows the error page
+        /// </summary>
+        public async Task<IActionResult> Error(string errorId)
+        {
+            var vm = new ErrorViewModel();
+
+            // retrieve error details from identityserver
+            var message = await _interaction.GetErrorContextAsync(errorId);
+            if (message != null)
+            {
+                vm.Error = message;
+
+                if (!_environment.IsDevelopment())
+                {
+                    // only show in development
+                    message.ErrorDescription = null;
+                }
+            }
+
+            return View("Error", vm);
+        }
+    }
+}