Question

尝试在Google云端硬盘上验证和访问电子表格时，我突然开始出现以下异常：

未处理的异常：Google.GData.Client.GDataRequestException：执行aut hentication请求意外返回结果：404 at Google.GData.Client.Utilities.getAuthException（TokenCollection tokens， Htt pWebResponse回复）在Google.GData.Client.Utilities.QueryClientLoginToken（GDataCredentials gc，S tring serviceName，String applicationName，Boolean fUseKeepAlive，IWebProxy prox yServer，Uri clientLoginHandler）在Google.GData.Client.GDataGAuthRequest.QueryAuthToken（GDataCredentials GC） at Google.GData.Client.GDataGAuthRequest.EnsureCredentials（） at Google.GData.Client.GDataRequest.EnsureWebRequest（） at Google.GData.Client.GDataGAuthRequest.EnsureWebRequest（）在Google.GData.Client.GDataRequest.Execute（） at Google.GData.Client.GDataGAuthRequest.Execute（Int32 retryCounter）在Google.GData.Client.GDataGAuthRequest.Execute（）在Google.GData.Client.Service.Query（Uri queryUri，DateTime ifModifiedSince，String etag，Int64＆amp; contentLength）在Google.GData.Client.Service.Query（FeedQuery feedQuery）在Google.GData.Documents.DocumentsService.Query（DocumentsListQuery feedQuery）在GoogleLogger.GoogleService.getLastXECLogRows（String folderName，String fileName，Int32 rows）

这是代码已经运行了两年没有任何问题。我首先想到我可能已经失去了对我的生产系统的访问权限，但谷歌驱动器在我的网络浏览器中加载得很好。在其他几个系统上尝试过它并且得到了相同的结果。

他们今天在Google API中有所改变吗？这不是巧合！

Answer 1

Google已停用旧的身份验证API。应该使用OAuth 2.0。

我花了太多时间来弄清楚如何使用较新的Auth API和较旧的GData API从互联网上随处获取信息。我决定与屏幕截图分享所有细节，以节省您的时间。

转到https://console.developers.google.com/project
点击Create Project按钮

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创建项目。输入一些名字。

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转到API & Auth＆gt; Credentials并点击Create new Client ID按钮。它会自动为您创建JSON密钥 - 忽略它。

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点击Generate new P12 key

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文件下载将自动开始。记住密码，您需要它才能打开刚刚下载的文件。

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将下载的文件重命名为Key.p12并将其添加到您的解决方案中。请务必相应地设置Build Action和Copy to Output Directory。

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使用Nuget安装Google API Auth。在程序包管理器控制台中键入以下内容
```
Install-Package Google.Apis.Auth
```

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复制在步骤＃4中生成的服务帐户电子邮件地址。

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在Google电子表格中为此用户授予适当的权限。

使用以下代码查询电子表格。在下面的代码中替换电子邮件和Google电子表格URL地址。

const string ServiceAccountEmail = "452351479-q41ce1720qd9l94s8847mhc0toao1fed@developer.gserviceaccount.com";

var certificate = new X509Certificate2("Key.p12", "notasecret", X509KeyStorageFlags.Exportable);

var serviceAccountCredentialInitializer = 
    new ServiceAccountCredential.Initializer(ServiceAccountEmail)
    {
        Scopes = new[] { "https://spreadsheets.google.com/feeds" }
    }.FromCertificate(certificate);

var credential = new ServiceAccountCredential(serviceAccountCredentialInitializer);

if (!credential.RequestAccessTokenAsync(System.Threading.CancellationToken.None).Result)
    throw new InvalidOperationException("Access token request failed.");

var requestFactory = new GDataRequestFactory(null);
requestFactory.CustomHeaders.Add("Authorization: Bearer " + credential.Token.AccessToken);

var service = new SpreadsheetsService(null) { RequestFactory = requestFactory };

var query = new ListQuery("https://spreadsheets.google.com/feeds/list/0ApZkobM61WIrdGRYshh345523VNsLWc/1/private/full");
var feed = service.Query(query);

var rows = feed.Entries
    .Cast<ListEntry>()
    .Select(arg =>
        new
        {
            Field0 = arg.Elements[0].Value,
            Field1 = arg.Elements[1].Value
        })
    .ToList();

Answer 2

我通过使用带有oAuth2.0的服务帐户的此解决方案设法解决了这个问题 Accessing older GData APIs (Spreadsheet API) using OAuth 2 and a service account

解决方案： 1.在https://console.developers.google.com/project

中创建项目和Google服务帐户

生成您的p12密钥。
允许您在开发人员控制台中使用API（基本上我们将使用旧的API，因此您可以跳过此步骤，但以防万一）
使用以下代码（.NET Framework 4.5！）
也不要忘记授予＆＃34; youraccount@developer.gserviceaccount.com"通过按Share键为普通用户授予权限，即可访问电子表格文档。

代码：

using System.Security.Cryptography.X509Certificates;
using Google.GData.Client;
using Google.GData.Extensions;
using Google.GData.Spreadsheets;
using Google.Apis.Auth.OAuth2;

string keyFilePath = @"C:\key.p12";    // found in developer console
string serviceAccountEmail = "youraccount@developer.gserviceaccount.com";   // found in developer console
var certificate = new X509Certificate2(keyFilePath, "notasecret", X509KeyStorageFlags.Exportable);

ServiceAccountCredential credential = new ServiceAccountCredential(new ServiceAccountCredential.Initializer(serviceAccountEmail) //create credential using certificate
        {
            Scopes = new[] { "https://spreadsheets.google.com/feeds/" } //this scopr is for spreadsheets, check google scope FAQ for others
        }.FromCertificate(certificate));

credential.RequestAccessTokenAsync(System.Threading.CancellationToken.None).Wait(); //request token

var requestFactory = new GDataRequestFactory("Some Name"); 
requestFactory.CustomHeaders.Add(string.Format("Authorization: Bearer {0}", credential.Token.AccessToken));

SpreadsheetsService myService = new SpreadsheetsService("You App Name"); //create your old service
myService.RequestFactory = requestFactory; //add new request factory to your old service

SpreadsheetQuery query = new SpreadsheetQuery(); //do the job as you done it before
SpreadsheetFeed feed = myService.Query(query);

Answer 3

好吧，我明白了。分步说明如下 - 另请参阅下面提供的代码。仅供参考，这是在.Net 3.5中运行的，与以前提供的解决方案不同，没有新的依赖关系。你应该立即启动并运行。

如果您还没有创建OAuth 2.0凭据 - 我假设您已经知道如何获取这些凭据，而不是在这里：

a）登录您的Google开发者控制台：http://console.developers.google.com b）创建一个项目 c）创建您的凭据 - 使用已安装的应用程序＆＃39; d）添加您需要的API - 我认为绝对需要Drive API。我还添加了Drive SDK以防万一。
将以下代码复制到VS中，并使用客户端密钥和密钥编辑第一个Main（）方法。
运行应用并复制新的访问令牌和刷新令牌。将这些和您剩余的凭据放入下面的第二个Main（）方法。
您现在应该能够运行第二个Main（）方法（只需反转命名）。从现在开始，这将是你所需要的 - 无需重新运行第一个Main（）方法。

BTW，下面的第一个Main（）方法可以在这里找到：https://developers.google.com/google-apps/spreadsheets/authorize

using System;
using Google.GData.Client;
using Google.GData.Spreadsheets;
using Google.GData.Documents;
using System.Configuration;
using System.Collections.Specialized;

namespace GoogleSpreadsheet
{
  class GoogleOAutho2
  {

    private static String folderName = "crazy.ivan";


    static void Main(string[] args)
    {
      ////////////////////////////////////////////////////////////////////////////
      // STEP 1: Configure how to perform OAuth 2.0
      ////////////////////////////////////////////////////////////////////////////

      // TODO: Update the following information with that obtained from
      // https://code.google.com/apis/console. After registering
      // your application, these will be provided for you.

      string CLIENT_ID = "your_client_id";

      // This is the OAuth 2.0 Client Secret retrieved
      // above.  Be sure to store this value securely.  Leaking this
      // value would enable others to act on behalf of your application!
      string CLIENT_SECRET = "your_secret_key"

      // Space separated list of scopes for which to request access.
      string SCOPE = "https://www.googleapis.com/auth/drive https://spreadsheets.google.com/feeds https://docs.google.com/feeds";

      // This is the Redirect URI for installed applications.
      // If you are building a web application, you have to set your
      // Redirect URI at https://code.google.com/apis/console.
      string REDIRECT_URI = "urn:ietf:wg:oauth:2.0:oob";

      string TOKEN_TYPE = "refresh";

      ////////////////////////////////////////////////////////////////////////////
      // STEP 2: Set up the OAuth 2.0 object
      ////////////////////////////////////////////////////////////////////////////

      // OAuth2Parameters holds all the parameters related to OAuth 2.0.
      OAuth2Parameters parameters = new OAuth2Parameters();

      // Set your OAuth 2.0 Client Id (which you can register at
      // https://code.google.com/apis/console).
      parameters.ClientId = CLIENT_ID;

      // Set your OAuth 2.0 Client Secret, which can be obtained at
      // https://code.google.com/apis/console.
      parameters.ClientSecret = CLIENT_SECRET;

      // Set your Redirect URI, which can be registered at
      // https://code.google.com/apis/console.
      parameters.RedirectUri = REDIRECT_URI;

      ////////////////////////////////////////////////////////////////////////////
      // STEP 3: Get the Authorization URL
      ////////////////////////////////////////////////////////////////////////////

      // Set the scope for this particular service.
      parameters.Scope = SCOPE;

      parameters.AccessType = "offline"; // IMPORTANT and was missing in the original

      parameters.TokenType = TOKEN_TYPE; // IMPORTANT and was missing in the original


      // Get the authorization url.  The user of your application must visit
      // this url in order to authorize with Google.  If you are building a
      // browser-based application, you can redirect the user to the authorization
      // url.
      string authorizationUrl = OAuthUtil.CreateOAuth2AuthorizationUrl(parameters);
      Console.WriteLine(authorizationUrl);
      Console.WriteLine("Please visit the URL above to authorize your OAuth "
        + "request token.  Once that is complete, type in your access code to "
        + "continue...");
      parameters.AccessCode = Console.ReadLine();

      ////////////////////////////////////////////////////////////////////////////
      // STEP 4: Get the Access Token
      ////////////////////////////////////////////////////////////////////////////

      // Once the user authorizes with Google, the request token can be exchanged
      // for a long-lived access token.  If you are building a browser-based
      // application, you should parse the incoming request token from the url and
      // set it in OAuthParameters before calling GetAccessToken().
      OAuthUtil.GetAccessToken(parameters);
      string accessToken = parameters.AccessToken;
      string refreshToken = parameters.RefreshToken;
      Console.WriteLine("OAuth Access Token: " + accessToken + "\n");
      Console.WriteLine("OAuth Refresh Token: " + refreshToken + "\n");

      ////////////////////////////////////////////////////////////////////////////
      // STEP 5: Make an OAuth authorized request to Google
      ////////////////////////////////////////////////////////////////////////////

      // Initialize the variables needed to make the request
      GOAuth2RequestFactory requestFactory =
          new GOAuth2RequestFactory(null, "MySpreadsheetIntegration-v1", parameters);
      SpreadsheetsService service = new SpreadsheetsService("MySpreadsheetIntegration-v1");
      service.RequestFactory = requestFactory;

      // Make the request to Google
      // See other portions of this guide for code to put here...

      // Instantiate a SpreadsheetQuery object to retrieve spreadsheets.
      Google.GData.Spreadsheets.SpreadsheetQuery query = new Google.GData.Spreadsheets.SpreadsheetQuery();

      // Make a request to the API and get all spreadsheets.
      SpreadsheetFeed feed = service.Query(query);

      // Iterate through all of the spreadsheets returned
      foreach (SpreadsheetEntry entry in feed.Entries)
      {
        // Print the title of this spreadsheet to the screen
        Console.WriteLine(entry.Title.Text);
      }
      Console.ReadLine();

     }


    // once you copied your access and refresh tokens
    // then you can run this method directly from now on...
    static void MainX(string[] args)
    {
    GOAuth2RequestFactory requestFactory = RefreshAuthenticate();

         SpreadsheetsService service = new SpreadsheetsService("MySpreadsheetIntegration-v1");  
         service.RequestFactory = requestFactory;

      // Instantiate a SpreadsheetQuery object to retrieve spreadsheets.
      Google.GData.Spreadsheets.SpreadsheetQuery query = new Google.GData.Spreadsheets.SpreadsheetQuery();

      // Make a request to the API and get all spreadsheets.
      SpreadsheetFeed feed = service.Query(query);

      // Iterate through all of the spreadsheets returned
      foreach (SpreadsheetEntry entry in feed.Entries)
      {
        // Print the title of this spreadsheet to the screen
        Console.WriteLine(entry.Title.Text);
      }
      Console.ReadLine();



    public static GOAuth2RequestFactory RefreshAuthenticate() {
        OAuth2Parameters parameters = new OAuth2Parameters(){
            RefreshToken = "the_refresh_token_you_copied_from_the_CLI_running_the_first_method";
            AccessToken = "the_access_token_you_copied_from_the_CLI_running_the_first_method";
            ClientId = "your_client_id";
            ClientSecret = "your_dirty_little_secret";
            Scope = "https://www.googleapis.com/auth/drive https://spreadsheets.google.com/feeds",
            AccessType = "offline",
            TokenType = "refresh"
        };
        string authUrl = OAuthUtil.CreateOAuth2AuthorizationUrl(parameters);
        return new GOAuth2RequestFactory(null, "evilspeculator", parameters);
    }
  }
}

希望对你们有用 - 祝你好运！

Answer 4

Andrew我想知道你是如何得到google.apis.auth.oauth2 dll的。我试图暗示你的修复，我无法找到安装库的正确方法。

在我有这个部分之后，我觉得我可能能够让它工作。

Google.GData.Client.GDataRequestException - 旧代码中的身份验证突然失败

4 个答案: