使用服務帳戶將文件上傳到Google Merchant Center中生成的Google Cloud Storage存儲桶

Question

我可以使用以下代碼將文件上傳到Google Cloud Storage存儲桶。 我手動創建了存儲桶。

        String serviceAccountEmail = "xxxxxxxxxxxx-xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx@developer.gserviceaccount.com";

        var certificate = new X509Certificate2(@"C:\...\projectname-xxxxxxxxxxxx.p12", "notasecret", X509KeyStorageFlags.Exportable);
        var scopes = new[] { @"https://www.googleapis.com/auth/devstorage.full_control" };

        ServiceAccountCredential credential = new ServiceAccountCredential(
            new ServiceAccountCredential.Initializer(serviceAccountEmail)
            {
                Scopes = scopes
            }.FromCertificate(certificate));

        StorageService service = new StorageService(new BaseClientService.Initializer()
        {
            HttpClientInitializer = credential,
            ApplicationName = "Shipment Feed",
        });

        var bucketToUpload = "bucket-created-by-me";
        var newObject = new Google.Apis.Storage.v1.Data.Object()
        {
            Bucket = bucketToUpload,
            Name = "ShipmentFeed.txt"
        };


        FileStream fileStream = null;
        var path = @"C:\...\file.txt";
        fileStream = new FileStream(path, FileMode.Open);
        var uploadRequest = new ObjectsResource.InsertMediaUpload(service, newObject,
           bucketToUpload, fileStream, "text/plain");
        uploadRequest.Upload();

現在，當我嘗試將文件上傳到Google Merchant Center生成的同一Google帳戶的存儲桶時，我遇到了問題。 我使用了上面的代碼，只需將存儲桶名稱更改為Google Merchant中心從“設置”->“ Google Cloud Storage”提供的值

var bucketToUpload = "merchantxxxxxxx";

此過程未將文件上傳到存儲桶（已通過gsutil測試-存儲桶在我的項目中存在，但為空）。 為什么我不能上傳文件？

Answer 1

您的代碼未授權訪問Google雲端存儲。 創建ServiceAccountCredential后，必須通過調用以下方法獲取訪問令牌：

 ServiceAccountCredential sac = new ServiceAccountCredential(
            new ServiceAccountCredential.Initializer(serviceAccountEmail)
            {
                Scopes = scopes
            }.FromCertificate(certificate));
 var cts = new CancellationToken();
 var response = sac.RequestAccessTokenAsync(cts).Result;

如果響應為true ，則您的ServiceAccountCredential對象將設置ServiceAccountCredential.Token.AccessToken 。

然后，當您創建uploadRequest時，您必須提供獲得的AccessToken：

var uploadRequest = new ObjectsResource.InsertMediaUpload(service, newObject,
       bucketToUpload, fileStream, "text/plain");

uploadRequest.OauthToken = sac.Token.AccessToken;

最后調用：

uploadRequest.Upload();