如何從授權的access_token創建GoogleCredential？

我有一個的OAuth2令牌是這樣的...如何從授權的access_token創建GoogleCredential？

{{ 
    "access_token": "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx", 
    "expires_in": "3600", 
    "refresh_token": "xxxxxxxxxxxxxxxxxx", 
    "token_type": "Bearer", 
}}

，我試圖創建一個DriveService對象...

Service = new DriveService(new BaseClientService.Initializer() 
{ 
    HttpClientInitializer = credential, 
    ApplicationName = "foo", 
});

（這樣嗎？）

，但我很明顯，我沒有正確地做到這一點，並且在查找文檔時遇到了麻煩。

當我試圖創建一個GoogleCredential傳遞給DriveService

GoogleCredential credential = GoogleCredential.FromJson(credentialAsSerializedJson).CreateScoped(GoogleDriveScope);

我得到以下異常：

{System.InvalidOperationException：從JSON錯誤創建憑證。無法識別的憑證類型。

我是否完全用這種錯誤的方式去做？

（這是the sample code context）

來源

2017-06-02 danb

我對C＃並不熟悉，但我認爲有一本關於[C＃中的OAuth 2.0]的指南（https://developers.google.com/api-client-library/dotnet/guide/aaa_oauth#web- applications-aspnet-mvc）將幫助您使用授權的access_token創建driveService。這也將提供區分用戶憑證和ServiceAccountCredential的指南。希望這可以幫助。 –

我設法想出解決辦法。

的解決方案是創建一個客戶端ID我和ClientSecret一個Google.Apis.Auth.OAuth2.Flows.GoogleAuthorizationCodeFlow ...

Google.Apis.Auth.OAuth2.Flows.GoogleAuthorizationCodeFlow googleAuthFlow = new GoogleAuthorizationCodeFlow(new GoogleAuthorizationCodeFlow.Initializer() 
{ 
    ClientSecrets = new ClientSecrets() 
    { 
    ClientId = ClientID, 
    ClientSecret = ClientSecret, 
    } 
});

，也是一個Google.Apis.Auth.OAuth2.Responses.TokenResponse：

Google.Apis.Auth.OAuth2.Responses.TokenResponse responseToken = new TokenResponse() 
{ 
    AccessToken = SavedAccount.Properties["access_token"], 
    ExpiresInSeconds = Convert.ToInt64(SavedAccount.Properties["expires_in"]), 
    RefreshToken = SavedAccount.Properties["refresh_token"], 
    Scope = GoogleDriveScope, 
    TokenType = SavedAccount.Properties["token_type"], 
};

，並使用每個創建UserCredential是反過來，用於初始化DriveService ...

var credential = new UserCredential(googleAuthFlow, "", responseToken); 

Service = new DriveService(new BaseClientService.Initializer() 
{ 
    HttpClientInitializer = credential, 
    ApplicationName = "com.companyname.testxamauthgoogledrive", 
});

我更新了TestXamAuthGoogleDrive test harness project以反映這些更改。

來源

2017-06-08 19:47:45 danb

如何從授權的access_token創建GoogleCredential？

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