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Yavsc/AuthorizationServer/GoogleMiddleWare.cs

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+// Copyright (c) .NET Foundation. All rights reserved.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+
+using System;
+using Microsoft.AspNet.Authentication;
+using Microsoft.AspNet.Authentication.OAuth;
+using Microsoft.AspNet.Builder;
+using Microsoft.AspNet.DataProtection;
+using Microsoft.Extensions.Logging;
+using Microsoft.Extensions.OptionsModel;
+using Microsoft.Extensions.WebEncoders;
+namespace Yavsc.Auth
+{
+    /// <summary>
+    /// An ASP.NET Core middleware for authenticating users using Google OAuth 2.0.
+    /// </summary>
+    public class GoogleMiddleware : OAuthMiddleware<YavscGoogleOptions>
+    {
+        private RequestDelegate _next;
+        private ILogger _logger;
+
+        /// <summary>
+        /// Initializes a new <see cref="GoogleMiddleware"/>.
+        /// </summary>
+        /// <param name="next">The next middleware in the HTTP pipeline to invoke.</param>
+        /// <param name="dataProtectionProvider"></param>
+        /// <param name="loggerFactory"></param>
+        /// <param name="encoder"></param>
+        /// <param name="sharedOptions"></param>
+        /// <param name="options">Configuration options for the middleware.</param>
+        public GoogleMiddleware(
+            RequestDelegate next,
+            IDataProtectionProvider dataProtectionProvider,
+            ILoggerFactory loggerFactory,
+            UrlEncoder encoder,
+            IOptions<SharedAuthenticationOptions> sharedOptions,
+            YavscGoogleOptions options)
+            : base(next, dataProtectionProvider, loggerFactory, encoder, sharedOptions, options)
+        {
+            if (next == null)
+            {
+                throw new ArgumentNullException(nameof(next));
+            }
+            _next = next;
+
+            if (dataProtectionProvider == null)
+            {
+                throw new ArgumentNullException(nameof(dataProtectionProvider));
+            }
+
+            if (loggerFactory == null)
+            {
+                throw new ArgumentNullException(nameof(loggerFactory));
+            }
+            _logger = loggerFactory.CreateLogger<GoogleMiddleware>();
+
+            if (encoder == null)
+            {
+                throw new ArgumentNullException(nameof(encoder));
+            }
+
+            if (sharedOptions == null)
+            {
+                throw new ArgumentNullException(nameof(sharedOptions));
+            }
+
+            if (options == null)
+            {
+                throw new ArgumentNullException(nameof(options));
+            }
+
+        }
+
+        protected override AuthenticationHandler<YavscGoogleOptions> CreateHandler()
+        {
+            return new GoogleHandler(Backchannel,_logger);
+        }
+
+    }
+}