.vscode/settings.json

@@ -12,8 +12,10 @@
         "DOTNET",
         "ecdsa",
         "envsubst",
+        "Hsts",
         "Newtonsoft",
         "Npgsql",
+        "PKCE",
         "postit",
         "pschneider",
         "SLNDIR",

src/PostIt/PostIt/App.axaml.cs

@@ -25,7 +25,7 @@ public partial class App : Application
     /// <c>DataValidationErrors.SetErrors</c>.
     /// </summary>
     public IServiceProvider? Services { get; private set; }
-
+    private MainWindow window;
     public App()
     {
     }
@@ -137,7 +137,7 @@ public partial class App : Application
             var homePage = provider.GetRequiredService<HomePage>();
             homePage.DataContext = provider.GetRequiredService<HomePageViewModel>();
 
-            var window = new MainWindow();
+            window = new MainWindow();
             window.SessionBanner.DataContext = sessionStatus;
 
             // Build the navigation stack from scratch: HomePage is the
@@ -165,7 +165,7 @@ public partial class App : Application
             sessionStatus.LoginSucceeded += () =>
             {
                 var w = (MainWindow)((IClassicDesktopStyleApplicationLifetime)ApplicationLifetime!).MainWindow!;
-                _ = PushMainPageAsync(provider, w);
+                _ = PushMainPageAsync();
             };
 
             // When the user clicks the "Paramètres" button on the
@@ -196,7 +196,7 @@ public partial class App : Application
                 _ = w.NavRoot.PushAsync(settingsPage);
             };
 
-            window.Opened += async (_, _) => await BootAsync(provider, api, window);
+            window.Opened += async (_, _) => await BootAsync(provider, api);
         }
         else if (ApplicationLifetime is ISingleViewApplicationLifetime singleView)
         {
@@ -223,15 +223,14 @@ public partial class App : Application
     /// </summary>
     private static async Task BootAsync(
         IServiceProvider provider,
-        YavscApiClient api,
-        MainWindow window)
+        YavscApiClient api)
     {
         var refreshed = await api.TrySilentLoginAsync().ConfigureAwait(true);
         var sessionStatus = provider.GetRequiredService<SessionStatusViewModel>();
         sessionStatus.Refresh();
         if (!refreshed) return;
 
-        await PushMainPageAsync(provider, window).ConfigureAwait(true);
+        await PushMainPageAsync().ConfigureAwait(true);
     }
 
     /// <summary>
@@ -241,12 +240,13 @@ public partial class App : Application
     /// (interactive login from the banner). Pulled out as a helper so
     /// the two callers can't drift apart.
     /// </summary>
-    private static async Task PushMainPageAsync(IServiceProvider provider, MainWindow window)
+    public static async Task PushMainPageAsync()
     {
-        var mainVm = provider.GetRequiredService<MainPageViewModel>();
-        var mainPage = provider.GetRequiredService<MainPage>();
+        var app = (App)Current;
+        var mainVm = app.Services.GetRequiredService<MainPageViewModel>();
+        var mainPage = app.Services.GetRequiredService<MainPage>();
         mainPage.DataContext = mainVm;
-        await window.NavRoot.PushAsync(mainPage).ConfigureAwait(true);
+        await app.window.FindControl<NavigationPage>("NavRoot").PushAsync(mainPage).ConfigureAwait(true);
     }
 
     private bool TryHandOffCustomSchemeUrl()

src/PostIt/PostIt/ViewModels/HomePageViewModel.cs

@@ -1,6 +1,7 @@
+using CommunityToolkit.Mvvm.Input;
 using PostIt;
 using PostIt.Services;
-using PostIt.ViewModels;
+namespace PostIt.ViewModels;
 
 public class HomePageViewModel : ViewModelBase
 {
@@ -22,7 +23,7 @@ public class HomePageViewModel : ViewModelBase
         Api = api;
         Settings = settings;
     }
-
+    public RelayCommand OpenBlogs { get; set; } = new RelayCommand(() => App.PushMainPageAsync());
     /// <summary>
     /// Avalonia designer constructor. Builds a self-contained VM
     /// with a freshly-constructed Settings so the XAML preview can

src/PostIt/PostIt/ViewModels/Settings.cs

@@ -6,6 +6,7 @@ using Microsoft.Extensions.DependencyInjection;
 using System;
 using System.Collections.Generic;
 using System.IO;
+using System.Net.Http;
 using System.Text.Json;
 using System.Threading;
 
@@ -178,10 +179,20 @@ public partial class Settings : ViewModelBase
                 RedirectUri = Authentication.RedirectUri,
                 Scope = string.Join(' ', MergeScopes(this.Authentication.Scopes)),
                 TokenClientCredentialStyle = IdentityModel.Client.ClientCredentialStyle.PostBody,
-                PostLogoutRedirectUri = "https//yavsc.pschneider.fr",
+                PostLogoutRedirectUri = Authentication.Authority,
                 // PKCE is enabled by default when no client_secret is provided.
             };
 
+            if (IsDevelopmentEnvironment())
+            {
+                // Dev only: allow local/self-signed TLS for discovery/token
+                // endpoints when the machine does not trust a custom root.
+                options.BackchannelHandler = new HttpClientHandler
+                {
+                    ServerCertificateCustomValidationCallback = (_, _, _, _) => true
+                };
+            }
+
             if (browser is not null)
                 options.Browser = browser;
 
@@ -231,6 +242,14 @@ public partial class Settings : ViewModelBase
         }
     }
 
+    private static bool IsDevelopmentEnvironment()
+    {
+        return string.Equals(
+            Environment.GetEnvironmentVariable("ASPNETCORE_ENVIRONMENT"),
+            "Development",
+            StringComparison.OrdinalIgnoreCase);
+    }
+
     internal void Load()
     {
         if (Loaded) return;

src/PostIt/PostIt/Views/HomePage.axaml

@@ -1,7 +1,12 @@
 <ContentPage xmlns="https://github.com/avaloniaui"
              xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:vm="using:PostIt.ViewModels"
              x:Class="PostIt.Views.HomePage"
+             x:DataType="vm:HomePageViewModel"
              Header="Home">
+             <Design.DataContext>
+                  <vm:HomePageViewModel />
+              </Design.DataContext>
         <StackPanel HorizontalAlignment="Center"
                     VerticalAlignment="Center"
                     Spacing="12">
@@ -9,5 +14,8 @@
                            FontSize="22"
                            FontWeight="SemiBold"
                            HorizontalAlignment="Center"/>
+          <Button Content="Open Blog Interface"
+                  Command="{Binding OpenBlogs}"
+                  HorizontalAlignment="Center"/>
         </StackPanel>
 </ContentPage>

src/PostIt/PostIt/Views/MainPage.axaml

@@ -27,7 +27,6 @@
         <StackPanel Grid.Row="0" Spacing="12"
                     HorizontalAlignment="Stretch"
                     VerticalAlignment="Top">
-            <TextBlock Text="PostIt Blog API Interface" FontSize="20" FontWeight="Bold" />
 
             <StackPanel Orientation="Horizontal" Spacing="8">
                 <Button Command="{Binding LoadPosts}" Content="Load posts" />
@@ -93,4 +92,4 @@
             </Grid>
         </Border>
     </Grid>
-</ContentPage>
+</ContentPage>

src/PostIt/PostIt/Views/MainWindow.axaml

@@ -20,7 +20,7 @@
     -->
     <DockPanel LastChildFill="True">
         <views:SessionStatusBanner x:Name="SessionBanner"
-                                   DockPanel.Dock="Top"/>
+                                   DockPanel.Dock="Bottom"/>
         <NavigationPage x:Name="NavRoot"/>
     </DockPanel>
 

src/Yavsc.Org/Controllers/Accounting/AccountController.cs

@@ -791,12 +791,12 @@ IHtmlLocalizerFactory htmlLocalizerFactory,
         {
             if (userId == null || code == null)
             {
-                return View("Error");
+                return this.ErrorView<AccountController>("Error: userId or code is null.");
             }
             var user = await _userManager.FindByIdAsync(userId);
             if (user == null)
             {
-                return View("Error");
+                return this.ErrorView<AccountController>("Error: user not found.");
             }
             IdentityResult result = null;
             try
@@ -819,12 +819,12 @@ IHtmlLocalizerFactory htmlLocalizerFactory,
         {
             if (userId == null || code == null)
             {
-                return View("Error");
+                return this.ErrorView<AccountController>("Error: userId or code is null.");
             }
             var user = await _userManager.FindByIdAsync(userId);
             if (user == null)
             {
-                return View("Error");
+                return this.ErrorView<AccountController>("Error: user not found.");
             }
             bool result = false;
             try
@@ -837,7 +837,7 @@ IHtmlLocalizerFactory htmlLocalizerFactory,
                 _logger.LogError(ex.StackTrace);
                 _logger.LogError(ex.Message);
             }
-            return View(result ? "EmailConfirmed" : "Error");
+            return result ? View("EmailConfirmed") : this.ErrorView<AccountController>("Error confirming two factor token.");
         }
 
         //

src/Yavsc.Org/Controllers/Accounting/ManageController.cs

@@ -1,6 +1,5 @@
 
 using System.Security.Claims;
-using System.IO;
 using Microsoft.AspNetCore.Identity;
 using Microsoft.AspNetCore.Mvc;
 using Microsoft.Extensions.Localization;
@@ -490,12 +489,7 @@ namespace Yavsc.Controllers
                 : message == ManageMessageId.Error ? "An error has occurred."
                 : "";
             var user = await GetCurrentUserAsync();
-            if (user == null)
-            {
-                return View("Error");
-            }
             var userLogins = await _userManager.GetLoginsAsync(user);
-
             ViewBag.ShowRemoveButton = user.PasswordHash != null || userLogins.Count > 1;
 
             return View(new ManageLoginsViewModel
@@ -522,15 +516,7 @@ namespace Yavsc.Controllers
         public async Task<ActionResult> LinkLoginCallback()
         {
             var user = await GetCurrentUserAsync();
-            if (user == null)
-            {
-                return View("Error");
-            }
             var info = await _signInManager.GetExternalLoginInfoAsync(User.GetUserId());
-            if (info == null)
-            {
-                return RedirectToAction(nameof(ManageLogins), new { Message = ManageMessageId.Error });
-            }
             var result = await _userManager.AddLoginAsync(user, info);
             var message = result.Succeeded ? ManageMessageId.AddLoginSuccess : ManageMessageId.Error;
             return RedirectToAction(nameof(ManageLogins), new { Message = message });

src/Yavsc.Org/Controllers/Consent/ConsentController.cs

@@ -16,6 +16,7 @@ using System.Collections.Generic;
 using System;
 using Yavsc;
 using Yavsc.Extensions;
+using Yavsc.Models;
 
 namespace IdentityServerHost.Quickstart.UI
 {
@@ -53,10 +54,11 @@ namespace IdentityServerHost.Quickstart.UI
             {
                 return View("Index", vm);
             }
-
-            return View("Error");
+            return this.ErrorView<ConsentController>("No consent request matching request: " + returnUrl);
         }
 
+       
+
         /// <summary>
         /// Handles the consent screen postback
         /// </summary>
@@ -88,8 +90,8 @@ namespace IdentityServerHost.Quickstart.UI
             {
                 return View("Index", result.ViewModel);
             }
-
-            return View("Error");
+            return this.ErrorView<ConsentController>($"ReturnUrl: {model}, result: {result}" );
+        
         }
 
         /*****************************************/
@@ -170,11 +172,6 @@ namespace IdentityServerHost.Quickstart.UI
             {
                 return CreateConsentViewModel(model, returnUrl, request);
             }
-            else
-            {
-                _logger.LogError("No consent request matching request: {0}", returnUrl);
-            }
-
             return null;
         }
 
@@ -199,7 +196,7 @@ namespace IdentityServerHost.Quickstart.UI
             vm.IdentityScopes = request.ValidatedResources.Resources.IdentityResources.Select(x => CreateScopeViewModel(x, vm.ScopesConsented.Contains(x.Name) || model == null)).ToArray();
 
             var apiScopes = new List<ScopeViewModel>();
-            foreach(var parsedScope in request.ValidatedResources.ParsedScopes)
+            foreach (var parsedScope in request.ValidatedResources.ParsedScopes)
             {
                 var apiScope = request.ValidatedResources.Resources.FindApiScope(parsedScope.ParsedName);
                 if (apiScope != null)

src/Yavsc.Org/Controllers/Device/DeviceController.cs

@@ -16,6 +16,7 @@ using Microsoft.AspNetCore.Authorization;
 using Microsoft.AspNetCore.Mvc;
 using Microsoft.Extensions.Logging;
 using Microsoft.Extensions.Options;
+using Yavsc.Models;
 using Yavsc.Models.Access;
 
 namespace Yavsc.Controllers
@@ -49,7 +50,7 @@ namespace Yavsc.Controllers
             if (string.IsNullOrWhiteSpace(userCode)) return View("UserCodeCapture");
 
             var vm = await BuildViewModelAsync(userCode);
-            if (vm == null) return View("Error");
+            if (vm == null)  return this.ErrorView<DeviceController>($"ViewModel is null! userCodeParamName: {userCodeParamName}, userCode: {userCode}" );;
 
             vm.ConfirmUserCode = true;
             return View("UserCodeConfirmation", vm);
@@ -60,7 +61,7 @@ namespace Yavsc.Controllers
         public async Task<IActionResult> UserCodeCapture(string userCode)
         {
             var vm = await BuildViewModelAsync(userCode);
-            if (vm == null) return View("Error");
+            if (vm == null)  return this.ErrorView<DeviceController>($"UserCodeCapture: ViewModel is null! userCode: {userCode}" );
 
             return View("UserCodeConfirmation", vm);
         }
@@ -72,7 +73,20 @@ namespace Yavsc.Controllers
             if (model == null) throw new ArgumentNullException(nameof(model));
 
             var result = await ProcessConsent(model);
-            if (result.HasValidationError) return View("Error");
+            if (result.HasValidationError)
+            {
+                if (HttpContext.RequestServices.GetRequiredService<IHostEnvironment>().IsDevelopment())
+                {
+                    throw new InvalidOperationException("Device Authorization Input validation error: " + result.ValidationError);
+                }
+
+                return View("Error", 
+                    new ErrorViewModel {
+                        RequestId = HttpContext.TraceIdentifier,
+                        Description = "Device Authorization Input validation error: " + result.ValidationError 
+                        }
+                );
+            }
 
             return View("Success");
         }

src/Yavsc.Org/Controllers/HomeController.cs

@@ -15,18 +15,24 @@ namespace Yavsc.Controllers
     public class HomeController : Controller
     {
         readonly ApplicationDbContext _dbContext;
-
+        readonly ILogger<HomeController> _logger;
+        private readonly bool _isDevelopment;
         readonly IHtmlLocalizer _localizer;
 
         private SiteSettings siteSettings;
         public HomeController(ILogger<HomeController> logger, 
         IHtmlLocalizer<HomeController> localizer, 
         ApplicationDbContext context,
-        IOptions<SiteSettings> settingsOptions)
+        IOptions<SiteSettings> settingsOptions, 
+        IWebHostEnvironment env
+        )
         {
             _localizer = localizer;
             _dbContext = context;
             siteSettings = settingsOptions.Value;
+            _logger = logger;
+            _isDevelopment = env.IsDevelopment();
+
         }
 
         public async Task<IActionResult> Index(string id)
@@ -99,18 +105,44 @@ namespace Yavsc.Controllers
 
         public IActionResult Error()
         {
-            var feature = this.HttpContext.Features.Get<IExceptionHandlerFeature>();
-            if (feature == null) return View();
-            var errorType = feature?.Error;
-            if (errorType == null) return View();
-            if (errorType is NotSupportedException notSupported)
+            if (_isDevelopment)
             {
-                return View(new ErrorViewModel { 
-                    Description = notSupported.Message,
-                    RequestId = this.HttpContext.TraceIdentifier
-                });
+                _logger.LogInformation(
+                    "Home/Error requested in Development. This endpoint is disabled because DeveloperExceptionPage should handle unhandled exceptions.");
+
+                return NotFound(
+                    "In Development, /Home/Error is disabled. Unhandled exceptions are rendered by DeveloperExceptionPage.");
             }
-            return View("~/Views/Shared/Error.cshtml", feature?.Error);
+
+            var errorViewModel = new ErrorViewModel
+            {
+                RequestId = HttpContext.TraceIdentifier
+            };
+
+            var exceptionHandlerPathFeature =
+            HttpContext.Features.Get<IExceptionHandlerPathFeature>();
+
+            if (exceptionHandlerPathFeature is null)
+            {
+                _logger.LogWarning(
+                    "Home/Error called without IExceptionHandlerPathFeature in non-development environment.");
+
+                return View("~/Views/Shared/Error.cshtml", errorViewModel);
+            }
+
+            if (exceptionHandlerPathFeature?.Error is FileNotFoundException)
+            {
+                errorViewModel.Description = "The file was not found.";
+            }
+
+            if (exceptionHandlerPathFeature?.Path == "/")
+            {
+                errorViewModel.Description ??= string.Empty;
+                errorViewModel.Description += " Page: Home.";
+            }
+    
+          
+            return View("~/Views/Shared/Error.cshtml", errorViewModel);
         }
         public IActionResult Status(int id)
         {

src/Yavsc.Org/Extensions/HostingExtensions.cs

@@ -967,12 +967,12 @@ public static class HostingExtensions
         if (app.Environment.IsDevelopment())
         {
             app.UseDeveloperExceptionPage();
-            await app.MigrateDatabaseAsync();
         }
         else
         {
             app.UseExceptionHandler("/Home/Error");
-            logger.LogInformation("Running in production mode. Ensure the database is migrated.");
+            app.UseHsts();
+            logger.LogInformation("⨝ Running in production mode. Ensure the database is migrated.");
             await app.MigrateDatabaseAsync();
         }
 

src/Yavsc.Org/Helpers/ErrorViewHelpers.cs

@@ -0,0 +1,52 @@
+using Microsoft.AspNetCore.Mvc;
+using Yavsc.Models;
+
+public static class ErrorViewHelpers
+{
+    public static IActionResult ErrorView<T>(this Controller controller, string message)
+    {
+        var logger = controller.HttpContext.RequestServices.GetRequiredService<ILoggerFactory>()
+            .CreateLogger<T>();
+        
+        logger.LogError(message);
+        Dictionary<string, string> dictionary = new Dictionary<string, string>();
+        
+        if  (!controller.ModelState.IsValid)
+        {
+            foreach (var modelState in controller.ModelState.Values)
+            {
+                foreach (var error in modelState.Errors)
+                {
+                    logger.LogError("ModelState error: {0}", error.ErrorMessage);
+                    foreach (var key in controller.ModelState.Keys)
+                    {
+                        logger.LogError("ModelState key: {0}", key);
+                        dictionary.Add(key, 
+                        string.Join("\n", 
+                        controller.ModelState[key].Errors.Select( e => e.ErrorMessage).ToArray()));
+                    }
+                }
+            }
+        }
+
+        if (controller.HttpContext.Request.Headers.ContainsKey("Accept")
+         && controller.HttpContext.Request.Headers["Accept"].ToString().Contains("application/json"))
+        {
+            return controller.Json(new
+            {
+                RequestId = controller.HttpContext.TraceIdentifier,
+                Description = message,
+                ModelErrors = dictionary
+            });
+        }
+
+        return controller.View("Error",
+            new ErrorViewModel
+            {
+                RequestId = controller.HttpContext.TraceIdentifier,
+                Description = message,
+                ModelErrors = dictionary
+            }
+        );
+    }
+}

src/Yavsc.Org/Views/Shared/Error.cshtml

@@ -1,14 +1,41 @@
-@model ErrorViewModel
+@using Microsoft.AspNetCore.Hosting
+@using Yavsc.Models
+@inject IWebHostEnvironment Env
+@model object
 @{
     ViewBag.Title = "Error";
 }
 
 <h1 class="text-danger">Error.</h1>
-<h2 class="text-danger">An error occurred while processing your request.</h2>
 
-@if (Model!=null) if (Model.ShowRequestId)
+@if (Env.IsDevelopment())
 {
-    <p>
-        <strong>Request ID:</strong> <code>@Model.RequestId</code>
-    </p>
+    <h2 class="text-danger">An unhandled exception occurred while processing your request.</h2>
+    if (Model is Exception exception)
+    {
+        <pre class="text-danger">@exception.ToString()</pre>
+    }
+    else if (Model is ErrorViewModel errorViewModel && !string.IsNullOrWhiteSpace(errorViewModel.Description))
+    {
+        <pre class="text-danger">@errorViewModel.Description</pre>
+    }
+}
+else
+{
+    <h2 class="text-danger">An error occurred while processing your request.</h2>
+
+    if (Model is ErrorViewModel errorViewModel)
+    {
+        if (errorViewModel.ShowRequestId)
+        {
+            <p>
+                <strong>Request ID:</strong> <code>@errorViewModel.RequestId</code>
+            </p>
+        }
+
+        if (!string.IsNullOrWhiteSpace(errorViewModel.Description))
+        {
+            <p class="text-danger">@errorViewModel.Description</p>
+        }
+    }
 }

src/Yavsc.Server/Models/ErrorViewModel.cs

@@ -7,4 +7,5 @@ public class ErrorViewModel
 
     public bool ShowRequestId => !string.IsNullOrEmpty(RequestId);
 
+    public Dictionary<string, string> ModelErrors { get; set; }
 }