add more informative 404 errors

SharedLibraryCore/Services/ClientService.cs

@@ -299,6 +299,11 @@ namespace SharedLibraryCore.Services
 
                 var client = await iqClient.FirstOrDefaultAsync();
 
+                if (client == null)
+                {
+                    return null;
+                }
+
                 var foundClient = new
                 {
                     Client = client,

WebfrontCore/Controllers/HomeController.cs

@@ -34,7 +34,12 @@ namespace WebfrontCore.Controllers
 
             ViewBag.Description = Localization["WEBFRONT_ERROR_DESC"];
             ViewBag.Title = Localization["WEBFRONT_ERROR_TITLE"];
-            return View();
+            return View(exceptionFeature.Error);
+        }
+
+        public IActionResult ResponseStatusCode(int? statusCode = null)
+        {
+            return View(statusCode);
         }
     }
 }

WebfrontCore/Startup.cs

@@ -92,6 +92,8 @@ namespace WebfrontCore
         // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
         public void Configure(IApplicationBuilder app, IWebHostEnvironment env, ILoggerFactory loggerFactory)
         {
+            app.UseStatusCodePagesWithRedirects("/Home/ResponseStatusCode?statusCode={0}");
+
             if (env.EnvironmentName == "Development")
             {
                 app.UseDeveloperExceptionPage();

WebfrontCore/Views/Shared/Error.cshtml

@@ -1,6 +1,15 @@
-@{
+@model Exception
+@using SharedLibraryCore
+
+@{
     ViewData["Title"] = "Error";
 }
 
 <h4 class="text-danger">@SharedLibraryCore.Utilities.CurrentLocalization.LocalizationIndex["WEBFRONT_ERROR_GENERIC_TITLE"]</h4>
 <h4 class="text-danger">@SharedLibraryCore.Utilities.CurrentLocalization.LocalizationIndex["WEBFRONT_ERROR_GENERIC_DESC"]</h4>
+<strong class="text-warning">
+    @if (Model != null)
+    {
+        @SharedLibraryCore.Utilities.CurrentLocalization.LocalizationIndex["WEBFRONT_ERROR_CODE"].FormatExt(Model.Message);
+    }
+</strong>

WebfrontCore/Views/Shared/ResponseStatusCode.cshtml

@@ -0,0 +1,13 @@
+@model int
+@{
+    ViewData["Title"] = "Error";
+}
+
+<h4 class="text-danger">@SharedLibraryCore.Utilities.CurrentLocalization.LocalizationIndex["WEBFRONT_ERROR_GENERIC_TITLE"]</h4>
+<h4 class="text-danger">@SharedLibraryCore.Utilities.CurrentLocalization.LocalizationIndex["WEBFRONT_ERROR_GENERIC_DESC"]</h4>
+<strong class="text-warning">
+    @if (Model == 404)
+    {
+        @SharedLibraryCore.Utilities.CurrentLocalization.LocalizationIndex["WEBFRONT_ERROR_NOTFOUND"]
+    }
+</strong>