更改 Google 默认身份验证重定向 - C#（Google 库）

Question

我试试这个代码：https://developers.google.com/api-client-library/dotnet/guide/aaa_oauth#web_applications

我的代码相同

但是！我需要更改此默认 url 重定向。 现在是：redirect_uri=http:%2F%2Flocalhost:52674%2FAuthCallback%2FIndexAsync

如何更改此网址？请各位大侠帮忙。

谢谢

Answer 1

我还发现一开始更改 Google 的 OAuth 2.0 重定向 uri 确实很棘手，但事实证明它非常简单。你可以用不同的方式做到这一点。如果您遵循 Google 的 OAuth 2.0 Web 应用程序指南 (ASP.NET MVC)，最简单的选择是在 AppFlowMetadata 类中覆盖 AuthCallback 字符串。

https://developers.google.com/api-client-library/dotnet/guide/aaa_oauth

public override string AuthCallback
{
    get { return @"/AuthCallback/Index"; }
}

您也可以实现自己的“AuthorizationCodeMvcApp”版本，但这太过分了。不要过溪去取水。 :)

https://github.com/google/google-api-dotnet-client/tree/master/Src/GoogleApis.Auth.Mvc4/OAuth2/Mvc

但如果你想这样做，这里有一个例子：

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System;
using System.Threading;
using System.Threading.Tasks;
using System.Web.Mvc;
using Google.Apis.Auth.OAuth2.Mvc;
using Google.Apis.Auth.OAuth2.Web;

namespace ProjectName.GoogleCalendar
{
        /// <summary>
        /// Thread-safe OAuth 2.0 authorization code flow for a MVC web application that persists end-user credentials.
        /// </summary>
        public class CustomAuthorizationCodeMvcApp : AuthorizationCodeWebApp
        {

            private readonly Controller controller;
            private readonly FlowMetadata flowData;

            /// <summary>Gets the controller which is the owner of this authorization code MVC app instance.</summary>
            public Controller Controller { get { return controller; } }

            /// <summary>Gets the <see cref="Google.Apis.Auth.OAuth2.Mvc.FlowMetadata"/> object.</summary>
            public FlowMetadata FlowData { get { return flowData; } }

            /// <summary>Constructs a new authorization code MVC app using the given controller and flow data.</summary>
            public CustomAuthorizationCodeMvcApp(Controller controller, FlowMetadata flowData)
                : base(
                flowData.Flow,
                new Uri(controller.Request.Url.GetLeftPart(UriPartial.Authority) + "/CustomController" + flowData.AuthCallback).ToString(),
                controller.Request.Url.ToString())
            {
                this.controller = controller;
                this.flowData = flowData;
            }

            /// <summary>
            /// Asynchronously authorizes the installed application to access user's protected data. It gets the user 
            /// identifier by calling to <see cref="Google.Apis.Auth.OAuth2.Mvc.FlowMetadata.GetUserId"/> and then calls to
            /// <see cref="Google.Apis.Auth.OAuth2.AuthorizationCodeWebApp.AuthorizeAsync"/>.
            /// </summary>
            /// <param name="taskCancellationToken">Cancellation token to cancel an operation</param>
            /// <returns>
            /// Auth result object which contains the user's credential or redirect URI for the authorization server
            /// </returns>
            public Task<AuthResult> AuthorizeAsync(CancellationToken taskCancellationToken)
            {
                return base.AuthorizeAsync(FlowData.GetUserId(Controller), taskCancellationToken);
            }
        }
    }

Answer 2

您可以继承表单 FlowMetadata 并覆盖 AuthCallback 属性。看看下面的链接：

https://code.google.com/p/google-api-dotnet-client/source/browse/Src/GoogleApis.Auth.Mvc4/OAuth2/Mvc/FlowMetadata.cs?r=eb702f917c0e18fc960d077af132d0d83bcd6a88#49

但是，您将能够更改相对 URL，但不能更改绝对 URL。

如果您想使用完全不同的 URL，您需要创建自己的 AuthorizationCodeMvcApp 并将其构造函数更改为以下内容：

public MyNewAuthorizationCodeMvcApp(Controller controller, FlowMetadata flowData)
        : base(
        flowData.Flow,
        < YOUR URL HERE >,
        controller.Request.Url.ToString())
    {
        this.controller = controller;
        this.flowData = flowData;
    }

然后您可以将其插入您的流程，而不是默认的 AuthorizationCodeMvcApp（库的默认实现）。