App Config + Key Vault sample (Azure#22815)

Resolves Azure#21800

Author: heaths

samples/AppSecretsConfig/.gitignore

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+.vs/
+bin/
+obj/
+*.user
+launchSettings.json

samples/AppSecretsConfig/AppSecretsConfig.csproj

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+<Project Sdk="Microsoft.NET.Sdk.Web">
+
+  <PropertyGroup>
+    <TargetFramework>netcoreapp3.1</TargetFramework>
+    <RootNamespace>AppSecretsConfig</RootNamespace>
+</PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Azure.Identity" Version="1.4.0" />
+    <PackageReference Include="Microsoft.Extensions.Configuration.AzureAppConfiguration" Version="4.4.0" />
+  </ItemGroup>
+
+</Project>

samples/AppSecretsConfig/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>

samples/AppSecretsConfig/Pages/Error.cshtml.cs

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+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+
+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;
+using Microsoft.Extensions.Logging;
+
+namespace AppSecretsConfig.Pages
+{
+    [ResponseCache(Duration = 0, Location = ResponseCacheLocation.None, NoStore = true)]
+    public class ErrorModel : PageModel
+    {
+        public string RequestId { get; set; }
+
+        public bool ShowRequestId => !string.IsNullOrEmpty(RequestId);
+
+        private readonly ILogger<ErrorModel> _logger;
+
+        public ErrorModel(ILogger<ErrorModel> logger)
+        {
+            _logger = logger;
+        }
+
+        public void OnGet()
+        {
+            RequestId = Activity.Current?.Id ?? HttpContext.TraceIdentifier;
+        }
+    }
+}

samples/AppSecretsConfig/Pages/Index.cshtml

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+@page
+@model IndexModel
+
+@using Microsoft.Extensions.Configuration
+@inject IConfiguration Configuration
+
+@{
+    ViewData["Title"] = "Home page";
+}
+
+<div class="text-center p-3">
+    <p class="text-left">
+        The key-value pairs shown below are enumerated from <a href="https://docs.microsoft.com/azure/azure-app-configuration/overview">Azure App Configuration</a>.
+        You can store non-secret values e.g., endpoint host names and application IDs directly in App Configuration
+        and secrets e.g., application secrets in <a href="https://docs.microsoft.com/azure/key-vault/general/overview">Azure Key Vault</a> with a reference to those secrets
+        in App Configuration. The <a href="https://nuget.org/packages/Microsoft.Extensions.Configuration.AzureAppConfiguration">Microsoft.Extensions.Configuration.AzureAppConfiguration</a>
+        configuration provider will automatically retrieve secret values when retrieving key-values containing these special references.
+    </p>
+    <table class="table text-left">
+        <thead>
+            <tr>
+                <th scope="col">Key</th>
+                <th scope="col">Value</th>
+            </tr>
+        </thead>
+        <tbody>
+            <tr>
+                <td scope="row">APPCONFIG_VALUE</td>
+                <td>@Configuration["APPCONFIG_VALUE"]</td>
+            </tr>
+            <tr>
+                <td scope="row">KEYVAULT_SECRET</td>
+                <td>@Configuration["KEYVAULT_SECRET"]</td>
+            </tr>
+        </tbody>
+
+    </table>
+</div>

samples/AppSecretsConfig/Pages/Index.cshtml.cs

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+// Copyright (c) Microsoft Corporation. All rights reserved.
+// Licensed under the MIT License.
+
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.AspNetCore.Mvc.RazorPages;
+using Microsoft.Extensions.Logging;
+
+namespace AppSecretsConfig.Pages
+{
+    public class IndexModel : PageModel
+    {
+        private readonly ILogger<IndexModel> _logger;
+
+        public IndexModel(ILogger<IndexModel> logger)
+        {
+            _logger = logger;
+        }
+
+        public void OnGet()
+        {
+        }
+    }
+}

samples/AppSecretsConfig/Pages/Shared/_Layout.cshtml

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+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="utf-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <title>@ViewData["Title"] - AppConfigSample</title>
+    <link rel="stylesheet" href="~/lib/bootstrap/dist/css/bootstrap.min.css" />
+    <link rel="stylesheet" href="~/css/site.css" />
+</head>
+<body>
+    <div class="container">
+        <main role="main" class="pb-3">
+            @RenderBody()
+        </main>
+    </div>
+
+    <script src="~/lib/jquery/dist/jquery.min.js"></script>
+    <script src="~/lib/bootstrap/dist/js/bootstrap.bundle.min.js"></script>
+    <script src="~/js/site.js" asp-append-version="true"></script>
+
+    @RenderSection("Scripts", required: false)
+</body>
+</html>

samples/AppSecretsConfig/Pages/Shared/_ValidationScriptsPartial.cshtml

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+<script src="~/lib/jquery-validation/dist/jquery.validate.min.js"></script>
+<script src="~/lib/jquery-validation-unobtrusive/jquery.validate.unobtrusive.min.js"></script>

samples/AppSecretsConfig/Pages/_ViewImports.cshtml

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+@using AppSecretsConfig
+@namespace AppSecretsConfig.Pages
+@addTagHelper *, Microsoft.AspNetCore.Mvc.TagHelpers

samples/AppSecretsConfig/Pages/_ViewStart.cshtml

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+@{
+    Layout = "_Layout";
+}