Question

我已成功自动完成将Google Big Query中的数据移至Google存储空间的流程。现在，我还需要以自动方式将数据从Google Storage下载到我的环境中。

我正在尝试执行正常的HTTP请求，但之前已授权。所以我的HTTP请求是

    HttpRequestFactory requestFactory = HTTP_TRANSPORT.createRequestFactory(authorize());
    GenericUrl url = new GenericUrl(uri);
    HttpRequest request = requestFactory.buildGetRequest(url);
    HttpResponse response = request.execute();
    String content = response.parseAsString();

我的授权码是

/** Authorizes the installed application to access user's protected data. */
    private static Credential authorize() throws Exception
    {
        HttpTransport httpTransport = new NetHttpTransport();
        JsonFactory jsonFactory = new JacksonFactory();

        // load client secrets
        GoogleClientSecrets clientSecrets = GoogleClientSecrets.load(JSON_FACTORY,
                new InputStreamReader(BigQueryConsumer.class.getResourceAsStream("/secret.json")));

        // This creates the credentials datastore at ~/.oauth-credentials/${credentialDatastore}
        FileDataStoreFactory fileDataStoreFactory = new FileDataStoreFactory(new File(System.getProperty("user.home") + "/" + CREDENTIALS_DIRECTORY));

        // set up authorization code flow
        GoogleAuthorizationCodeFlow flow = new GoogleAuthorizationCodeFlow.Builder(
                httpTransport, JSON_FACTORY, clientSecrets,
                SCOPES).setDataStoreFactory(fileDataStoreFactory)
                .build();
        // authorize
        return new AuthorizationCodeInstalledApp(flow, new LocalServerReceiver()).authorize("user");
    }

以下常量

CREDENTIALS_DIRECTORY：“。outh-credentials”
JSON_FACTORY：JacksonFactory.getDefaultInstance（）
SCOPES：仅包含“https://www.googleapis.com/auth/devstorage.full_control”
HTTP_TRANSPORT：new NetHttpTransport（）

在身份验证/授权过程中我缺少什么？我正在

    Exception in thread "main" com.google.api.client.http.HttpResponseException: 401 Unauthorized
<HTML>
<HEAD>
<TITLE>Unauthorized</TITLE>
</HEAD>
<BODY BGCOLOR="#FFFFFF" TEXT="#000000">
<H1>Unauthorized</H1>
<H2>Error 401</H2>
</BODY>
</HTML>

Answer 1

寻找答案的其他人。要使用应用程序默认凭据，您需要执行以下几个步骤...您可以按照以下步骤操作，或查看此link。

首先要做的事情是：安装谷歌云存储SDK
确保您可以从SDK运行命令。如果您没有安装python，则需要安装python 2.7或更高版本，以及pyopenssl ...
您需要通过运行SDK在SDK中进行身份验证 gcloud auth activate-service-account [服务帐户电子邮件] --key-fil e [.p12文件]（编辑方括号中的值）。当您运行此操作时，您应该会收到一条消息，告知您已激活服务帐户
您需要通过设置从SDK设置环境变量 GOOGLE_APPLICATION_CREDENTIALS到秘密的JSON路径（从开发人员控制台创建的服务帐户下载的路径） CLOUDSDK_PYTHON_SITEPACKAGES为1，还设置项目

配置系统变量的命令......

set GOOGLE_APPLICATION_CREDENTIALS "secret.json path"
set CLOUDSDK_PYTHON_SITEPACKAGES 1
gcloud config set project "your project name"

在您进行身份验证并自行授权后，您可以开始使用应用程序默认凭据，前提是您已正确设置环境。

当您成功设置环境后，您可以通过

        GoogleCredential credential = GoogleCredential.getApplicationDefault();

        if (credential.createScopedRequired()) {
            credential = credential.createScoped(StorageScopes.all());
        }

        HttpTransport httpTransport = GoogleNetHttpTransport.newTrustedTransport();
        storageService = new Storage.Builder(httpTransport, jsonFactory, credential)
                .setApplicationName(applicationName).build();

使用HTTP GET从Google存储分区中获取对象，例如以下内容

// Set up and execute a Google Cloud Storage request.
                String uri = "https://storage.googleapis.com/" + URLEncoder.encode("[your bucket name here]", "UTF-8") + "/" + googleStorageFileName + "/" + fileName;

                httpTransport = GoogleNetHttpTransport.newTrustedTransport();
                HttpRequestFactory requestFactory = httpTransport.createRequestFactory(
                        credential);
                GenericUrl url = new GenericUrl(uri);

                HttpRequest request = requestFactory.buildGetRequest(url);
                HttpResponse response = request.execute();
                String content = response.parseAsString();
                BufferedWriter writer = new BufferedWriter( new FileWriter( pathToSave + googleStorageFileName));
                writer.write( content);

使用Java

1 个答案: