Init commit.

3 files changed, 52 insertions, 0 deletions

diff --git a/Timeline/Pages/Error.cshtml b/Timeline/Pages/Error.cshtml
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+++ b/Timeline/Pages/Error.cshtml
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+@page
+@model ErrorModel
+@{
+    ViewData["Title"] = "Error";
+}
+
+<h1 class="text-danger">Error.</h1>
+<h2 class="text-danger">An error occurred while processing your request.</h2>
+
+@if (Model.ShowRequestId)
+{
+    <p>
+        <strong>Request ID:</strong> <code>@Model.RequestId</code>
+    </p>
+}
+
+<h3>Development Mode</h3>
+<p>
+    Swapping to the <strong>Development</strong> environment displays detailed information about the error that occurred.
+</p>
+<p>
+    <strong>The Development environment shouldn't be enabled for deployed applications.</strong>
+    It can result in displaying sensitive information from exceptions to end users.
+    For local debugging, enable the <strong>Development</strong> environment by setting the <strong>ASPNETCORE_ENVIRONMENT</strong> environment variable to <strong>Development</strong>
+    and restarting the app.
+</p>
diff --git a/Timeline/Pages/Error.cshtml.cs b/Timeline/Pages/Error.cshtml.cs
new file mode 100644
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+++ b/Timeline/Pages/Error.cshtml.cs
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+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Linq;
+using System.Threading.Tasks;
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.AspNetCore.Mvc.RazorPages;
+
+namespace Timeline.Pages
+{
+    [ResponseCache(Duration = 0, Location = ResponseCacheLocation.None, NoStore = true)]
+    public class ErrorModel : PageModel
+    {
+        public string RequestId { get; set; }
+
+        public bool ShowRequestId => !string.IsNullOrEmpty(RequestId);
+
+        public void OnGet()
+        {
+            RequestId = Activity.Current?.Id ?? HttpContext.TraceIdentifier;
+        }
+    }
+}
diff --git a/Timeline/Pages/_ViewImports.cshtml b/Timeline/Pages/_ViewImports.cshtml
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+++ b/Timeline/Pages/_ViewImports.cshtml
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+@using Timeline
+@namespace Timeline.Pages
+@addTagHelper *, Microsoft.AspNetCore.Mvc.TagHelpers