Google OAuth2:何时以及如何使用刷新令牌

本文介绍了Google OAuth2:何时以及如何使用刷新令牌的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 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)是我从此处使用刷新令牌.访问令牌过期后会调用此方法吗?

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 = "www.google/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); }