Google OAuth2:何时以及如何使用刷新令牌 [英] Google OAuth2: When and how to use refresh token

问题描述

我有一个已安装的c#应用程序，其代码可以正常工作，该应用程序获取授权码并将其交换为访问令牌.我存储了刷新令牌.我知道有时需要使用它来获取新的访问令牌.假设我定期调用以下方法来监视与我的云端硬盘帐户共享的文件.

I have an installed c# app with code working that gets the authorization code and exchanges it for an access token. I am storing off the refresh token. I know at some point I need to use it to get a new access token. Let's assume that I am periodically calling the following method to monitor the files that have been shared with my Drive account.

   /// <summary>
   /// Retrieve a list of File resources.
   /// </summary>
   /// <param name="service">Drive API service instance.</param>
   /// <returns>List of File resources.</returns>
   public static List<File> retrieveAllFiles(DriveService service) {
      List<File> result = new List<File>();
      FilesResource.ListRequest request = service.Files.List();
      request.Q = "sharedWithMe and trashed=false";
      do {
         try {
            FileList files = request.Fetch();

            result.AddRange(files.Items);
            request.PageToken = files.NextPageToken;
         } catch (Exception e) {
            Console.WriteLine("An error occurred: " + e.Message);
            request.PageToken = null;
         }
      } while (!String.IsNullOrEmpty(request.PageToken));
      return result;
   }
}

我认为在某个时候对service.Files.List()的调用将失败.我怎么知道它由于访问令牌过期而失败，以及使用刷新令牌的代码是什么?我已经有一些代码(如下)是我从

I assume that at some point the call to service.Files.List() is going to fail. How do I know it has failed due to an expired access token and what is the code to use the refresh token? I already have some code (below) that I gleaned from here to use the refresh token. Will this method get called when the access token expires?

    private static IAuthorizationState GetAuthorization(NativeApplicationClient arg)
   {
      // If we already have a RefreshToken, use that
      if (!string.IsNullOrEmpty(RefreshToken))
      {
         state.RefreshToken = RefreshToken;
         if (arg.RefreshToken(state)) {
            mTextBox.Text = "RF: " + RefreshToken;
            return state;
         }
      }
      // authCode is a TextBox on the form
      var result = arg.ProcessUserAuthorization(mTextBox.Text, state);
      RefreshToken = state.RefreshToken;
      return result;
   }

推荐答案

如果仍然有人在刷新AccessToken时遇到问题，也许可以帮助您找到解决方案:

If someone still have Problems with refreshing the AccessToken, maybe this can help you finding a solution:

            Google.GData.Client.RequestSettings settings = new RequestSettings("<AppName>");
            Google.GData.Client.OAuth2Parameters parameters = new OAuth2Parameters()
            {
                ClientId = "<YourClientId>",
                ClientSecret = "<YourClientSecret>",
                AccessToken = "<OldAccessToken>", //really necessary?

                RedirectUri = "urn:ietf:wg:oauth:2.0:oob",
                RefreshToken = "<YourRefreshToken>",
                AccessType = "offline",
                TokenType = "refresh",
                Scope = "https://www.google.com/m8/feeds/" //Change to needed scopes, I used this for ContactAPI
            };
            try
            {
                Google.GData.Client.OAuthUtil.RefreshAccessToken(parameters);
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }

这篇关于Google OAuth2:何时以及如何使用刷新令牌的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！