使用現有訪問令牌創建Google Drive DriveService

Question

我正在使用ASP.NET Web API和Google.Apis.Drive.v2 Client Library for .NET將文件上傳到用戶Drive。

使用適用於.NET的Drive Client Library的所有示例都需要身份驗證流程。但是當我已經知道訪問令牌時，我應該如何創建DriveService？

Answer 1

通常，當您訪問使用谷歌驅動器的oauth2你會做這樣的事情

//Scopes for use with the Google Drive API 
string[] scopes = new string[] { DriveService.Scope.Drive, 
           DriveService.Scope.DriveFile}; 
// here is where we Request the user to give us access, or use the Refresh Token that was previously stored in %AppData% 
UserCredential credential = 
      GoogleWebAuthorizationBroker 
          .AuthorizeAsync(new ClientSecrets { ClientId = CLIENT_ID 
                  , ClientSecret = CLIENT_SECRET } 
              ,scopes 
              ,Environment.UserName 
              ,CancellationToken.None 
              ,new FileDataStore("Daimto.GoogleDrive.Auth.Store") 
             ).Result; 

這將創建一個UserCredential然後你可以用它來創建一個DriveService

DriveService service = new DriveService(new BaseClientService.Initializer() 
{ 
HttpClientInitializer = credential, 
ApplicationName = "Drive API Sample", 
}); 

你要去的問題FileDataStore將證書信息存儲在硬盤上。在%AppData%目錄中。

你想要做的是創建你自己的IDataStore的實現，並使用它。執行此操作的代碼非常廣泛。我目前最接近的例子是將從database加載刷新令牌的例子。我沒有時間去創建一個教程，但該項目正在GitHub上。 Google-Dotnet-Samples/Authentication歡迎您隨身攜帶。我會檢查數據庫，你應該能夠改變它，讓你向它提交一個refreshtoken。

Answer 2

儘管有過2次年以來的問題已經被問的事實，今天我遇到了同樣的情況，我的解決辦法是：

var valid_token = "Pass_the_valid_token_here"; 
var token = new Google.Apis.Auth.OAuth2.Responses.TokenResponse() 
{ 
    AccessToken = valid_token, 
    ExpiresInSeconds = 3600, 
    Issued = DateTime.Now 
}; 

var fakeflow = new GoogleAuthorizationCodeFlow(new GoogleAuthorizationCodeFlow.Initializer 
{ 
    ClientSecrets = new ClientSecrets 
    { 
     ClientId = "fakeClientId", 
     ClientSecret = "fakeClientSecret" 
    } 
}); 

UserCredential credential = new UserCredential(fakeflow, "fakeUserId", token); 
var serviceInitializer = new BaseClientService.Initializer() 
{ 
    //ApplicationName = "Storage Sample", 
    HttpClientInitializer = credential 
}; 

DriveService service = new DriveService(serviceInitializer);