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我正在寻找一种从 java 代码中以编程方式调用firestore 导入/导出功能的方法。

到目前为止，我发现漂亮的Firestore 客户端库还不支持导入/导出调用。但是更底层的rest/grpc api已经支持它们。使用java 库我尝试了以下操作：

Firestore firestoreApi = new Firestore
    .Builder(UrlFetchTransport.getDefaultInstance(), new GsonFactory(), null)
    .setApplicationName(SystemProperty.applicationId.get())
    .build();

GoogleFirestoreAdminV1beta2ImportDocumentsRequest importRequest = new GoogleFirestoreAdminV1beta2ImportDocumentsRequest();
importRequest.setInputUriPrefix(String.format("gs://{}/{}/", BUCKET, image));

GoogleLongrunningOperation operation = firestoreApi
    .projects()
    .databases()
    .importDocuments("projects/" + SystemProperty.applicationId.get() + "/databases/(default)", importRequest)
    .execute();

遗憾的是，在应用引擎中运行时缺少权限：

com.google.api.client.googleapis.json.GoogleJsonResponseException: 401
{
  "code": 401,
  "errors": [
    {
      "domain": "global",
      "location": "Authorization",
      "locationType": "header",
      "message": "Login Required.",
      "reason": "required"
    }
  ],
  "message": "Request is missing required authentication credential. Expected OAuth 2 access token, login cookie or other valid authentication credential. See https://developers.google.com/identity/sign-in/web/devconsole-project.",
  "status": "UNAUTHENTICATED"

我无法获得正式的登录方式来工作，因为 firestore 构建器没有接受AppEngineCredentials.

我已经检查了似乎也不支持这些方法的python客户端库（还）。有谁知道我如何使用旧的rest api登录或获取支持这些方法的客户端库（请在应用引擎上运行一些语言:)）

谢谢阅读！卡斯滕

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1 回答 1

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您可以针对 Cloud Firestore调整此Cloud Datastore 示例。在此处查看他们如何获取访问令牌：

import com.google.appengine.api.appidentity.AppIdentityService;
import com.google.appengine.api.appidentity.AppIdentityServiceFactory;

// Get an access token to authorize export request
      ArrayList<String> scopes = new ArrayList<String>();
      scopes.add("https://www.googleapis.com/auth/datastore");
      final AppIdentityService appIdentity = AppIdentityServiceFactory.getAppIdentityService();
      final AppIdentityService.GetAccessTokenResult accessToken =
          AppIdentityServiceFactory.getAppIdentityService().getAccessToken(scopes);
      connection.addRequestProperty("Authorization", "Bearer " + accessToken.getAccessToken());
于 2019-04-12T16:52:02.130 回答