Question

在研究Google Compute Documentation后，我发现没有通过生成的服务访问密钥进行身份验证的示例。

我尝试使用以下代码（这是第69行）

GoogleCredential credential = new GoogleCredential.Builder()
                .setClientSecrets(authorize())
                .build();

和

private static  GoogleClientSecrets authorize() {
    // initialize client secrets object
    GoogleClientSecrets clientSecrets;
    // load client secrets
    try {
        clientSecrets = GoogleClientSecrets.load(JSON_FACTORY, new InputStreamReader(
                GCEImporter.class.getResourceAsStream("/client_secrets.json")));

    } catch(IOException e){
        e.printStackTrace();
        return null;
    }


    return clientSecrets;
}

client_secrets.json是谷歌生成的文件，看起来像这样

{
 "type": "service_account",
 "project_id": "...",
 "private_key_id": "...",
 "private_key": "-----BEGIN PRIVATE KEY-----...-----END PRIVATE KEY-----\n",
 "client_email": "....iam.gserviceaccount.com",
 "client_id": "...",
 "auth_uri": "https://accounts.google.com/o/oauth2/auth",
 "token_uri": "https://accounts.google.com/o/oauth2/token",
 "auth_provider_x509_cert_url": 
 "https://www.googleapis.com/oauth2/v1/certs",
 "client_x509_cert_url": 
 "https://www.googleapis.com/robot/v1/metadata/x509/..."
}

执行此代码时我收到的是

java.lang.IllegalArgumentException
at com.google.api.client.repackaged.com.google.common.base.Preconditions.checkArgument(Preconditions.java:111)
at com.google.api.client.util.Preconditions.checkArgument(Preconditions.java:37)
at com.google.api.client.googleapis.auth.oauth2.GoogleClientSecrets.getDetails(GoogleClientSecrets.java:82)
at com.google.api.client.googleapis.auth.oauth2.GoogleCredential$Builder.setClientSecrets(GoogleCredential.java:559)
at net.bytesource.jira.asset.synchronization.importer.google.gce.GCEImporter.getAssets(GCEImporter.java:69)
at net.bytesource.jira.asset.synchronization.importer.google.gce.GoogleImporterTest.getAssets(GoogleImporterTest.java:33)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:45)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:42)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:263)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:68)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:47)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222)
at org.junit.runners.ParentRunner.run(ParentRunner.java:300)
at org.junit.runner.JUnitCore.run(JUnitCore.java:157)
at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47)
at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)

有没有人能解决这个问题？

Answer 1

感谢您的回答Tuxdude。我也是通过从网站上复制示例来提前尝试过的。但这仅适用于GCE环境中的实例。

我自己找到了解决方案，这是GoogleCredential类的静态方法：

GoogleCredential.fromStream(new FileInputStreamReader("path/to/json"))

Answer 2

这里几乎没有问题：

从IAM页面创建新服务帐户时下载的私钥信息json文件不在format that is expected by Client Secrets。
您正在尝试关注[OAuth steps that are meant for Desktop and mobile apps][2]。这不适用于Google Cloud API。

使用Google Cloud API进行授权的推荐且更简单的方法是使用描述为here和here的应用程序默认凭据。

简而言之，您需要做的是（基于大纲here）：

设置环境变量GOOGLE_APPLICATION_CREDENTIALS中的JSON文件的路径。
创建GoogleCredential对象，如下所示。

GoogleCredential credential = GoogleCredential.getApplicationDefault();

完成上述步骤后，您应该可以与任何Google Cloud API对话。如果是GCE，您将创建一个Compute

Compute compute = new Compute.Builder (transport, jsonFactory, credential).build();

我只是从compute.instances.insert API here复制并粘贴示例。

/*
 * BEFORE RUNNING:
 * ---------------
 * 1. If not already done, enable the Compute Engine API
 *    and check the quota for your project at
 *    https://console.developers.google.com/apis/api/compute
 * 2. This sample uses Application Default Credentials for authentication.
 *    If not already done, install the gcloud CLI from
 *    https://cloud.google.com/sdk and run
 *    `gcloud beta auth application-default login`.
 *    For more information, see
 *    https://developers.google.com/identity/protocols/application-default-credentials
 * 3. Install the Java client library on Maven or Gradle. Check installation
 *    instructions at https://github.com/google/google-api-java-client.
 *    On other build systems, you can add the jar files to your project from
 *    https://developers.google.com/resources/api-libraries/download/compute/v1/java
 */
import com.google.api.client.googleapis.auth.oauth2.GoogleCredential;
import com.google.api.client.googleapis.javanet.GoogleNetHttpTransport;
import com.google.api.client.http.HttpTransport;
import com.google.api.client.json.JsonFactory;
import com.google.api.client.json.jackson2.JacksonFactory;
import com.google.api.services.compute.Compute;
import com.google.api.services.compute.model.Instance;
import com.google.api.services.compute.model.Operation;
import java.io.IOException;
import java.security.GeneralSecurityException;
import java.util.Arrays;

public class ComputeExample {
  public static void main(String args[]) throws IOException, GeneralSecurityException {
    // Project ID for this request.
    String project = ""; // TODO: Update placeholder value.

    // The name of the zone for this request.
    String zone = ""; // TODO: Update placeholder value.

    // TODO: Assign values to desired fields of `requestBody`:
    Instance requestBody = new Instance();

    Compute computeService = createComputeService();
    Compute.Instances.Insert request =
        computeService.instances().insert(project, zone, requestBody);

    Operation response = request.execute();

    // TODO: Change code below to process the `response` object:
    System.out.println(response);
  }

  public static Compute createComputeService() throws IOException, GeneralSecurityException {
    HttpTransport httpTransport = GoogleNetHttpTransport.newTrustedTransport();
    JsonFactory jsonFactory = JacksonFactory.getDefaultInstance();

    GoogleCredential credential = GoogleCredential.getApplicationDefault();
    if (credential.createScopedRequired()) {
      credential =
          credential.createScoped(Arrays.asList("https://www.googleapis.com/auth/cloud-platform"));
    }

    return new Compute.Builder(httpTransport, jsonFactory, credential)
        .setApplicationName("Google-ComputeSample/0.1")
        .build();
  }
}

通过服务访问密钥

2 个答案: