此页面由 Cloud Translation API 翻译。

使用存储桶标签

本页面介绍如何添加、修改、移除和查看在 Cloud Storage 存储桶上设置的标签。

所需的角色

为了获得添加和管理存储桶标签所需的权限，请让您的管理员授予您存储桶的 Storage Admin (roles/storage.admin) IAM 角色。

此预定义角色包含添加和管理存储桶标签所需的权限。如需查看所需的确切权限，请展开所需权限部分：

所需权限

storage.buckets.get
storage.buckets.list
- 仅当您计划使用 Google Cloud 控制台执行本页面上的任务时，才需要此权限。
storage.buckets.update

您也可以使用自定义角色来获取这些权限。

如需了解如何授予存储桶的角色，请参阅将 IAM 与存储桶搭配使用。

添加、修改或移除存储桶的标签

控制台

在 Google Cloud 控制台中，进入 Cloud Storage 存储桶页面。
进入“存储桶”
在存储桶列表中，点击要为其添加、修改或移除标签的存储桶的名称。
在存储桶详情页面中，点击配置标签页。
点击标签对应的修改图标 ()。

系统会显示标签编辑器窗口。
1. 如需添加标签，请点击 添加标签按钮，并为标签指定 key 和 value。
2. 如需修改现有标签，请点击其值并输入新值。
3. 如需移除标签，请点击与要移除的标签关联的垃圾桶图标。
点击保存。

如需了解如何在 Google Cloud 控制台中获取失败的 Cloud Storage 操作的详细错误信息，请参阅问题排查。

命令行

要添加新标签或更新现有标签，请使用带有 --update-labels 标志的 gcloud storage buckets update 命令。例如：

gcloud storage buckets update gs://BUCKET_NAME --update-labels=KEY_1=VALUE_1

地点

BUCKET_NAME 是该标签应用于的存储桶的名称，例如 my-bucket。
KEY_1 是标签的键名，例如 pet。
VALUE_1 是标签的值，例如 dog。

如需移除现有标签，请使用 -remove-labels 标志。例如：

gcloud storage buckets update gs://BUCKET_NAME --remove-labels=KEY_1

您可以使用上述命令更改多个标签，方法是在相关标志内的逗号分隔列表中添加标签。例如 --update-labels=blue-key=cyan,red-key=ruby。

如需移除附加到存储桶的所有标签，请使用以下命令：

gcloud storage buckets update gs://BUCKET_NAME --clear-labels

客户端库

C++

如需了解详情，请参阅 Cloud Storage C++ API 参考文档。

如需向 Cloud Storage 进行身份验证，请设置应用默认凭据。如需了解详情，请参阅为客户端库设置身份验证。

以下示例将指定的标签添加到存储桶，或者修改标签（如果存储桶已存在该标签）：

namespace gcs = ::google::cloud::storage;
using ::google::cloud::StatusOr;
[](gcs::Client client, std::string const& bucket_name,
   std::string const& label_key, std::string const& label_value) {
  StatusOr<gcs::BucketMetadata> updated = client.PatchBucket(
      bucket_name,
      gcs::BucketMetadataPatchBuilder().SetLabel(label_key, label_value));
  if (!updated) throw std::move(updated).status();

  std::cout << "Successfully set label " << label_key << " to " << label_value
            << " on bucket  " << updated->name() << ".";
  std::cout << " The bucket labels are now:";
  for (auto const& kv : updated->labels()) {
    std::cout << "\n  " << kv.first << ": " << kv.second;
  }
  std::cout << "\n";
}

以下示例从存储桶中移除指定的标签：

namespace gcs = ::google::cloud::storage;
using ::google::cloud::StatusOr;
[](gcs::Client client, std::string const& bucket_name,
   std::string const& label_key) {
  StatusOr<gcs::BucketMetadata> updated = client.PatchBucket(
      bucket_name, gcs::BucketMetadataPatchBuilder().ResetLabel(label_key));
  if (!updated) throw std::move(updated).status();

  std::cout << "Successfully reset label " << label_key << " on bucket  "
            << updated->name() << ".";
  if (updated->labels().empty()) {
    std::cout << " The bucket now has no labels.\n";
    return;
  }
  std::cout << " The bucket labels are now:";
  for (auto const& kv : updated->labels()) {
    std::cout << "\n  " << kv.first << ": " << kv.second;
  }
  std::cout << "\n";
}

C#

如需了解详情，请参阅 Cloud Storage C# API 参考文档。

如需向 Cloud Storage 进行身份验证，请设置应用默认凭据。如需了解详情，请参阅为客户端库设置身份验证。

以下示例将指定的标签添加到存储桶，或者修改标签（如果存储桶已存在该标签）：


using Google.Apis.Storage.v1.Data;
using Google.Cloud.Storage.V1;
using System;
using System.Collections.Generic;

public class BucketAddLabelSample
{
    public Bucket BucketAddLabel(
        string bucketName = "your-bucket-name",
        string labelKey = "label-key-to-add",
        string labelValue = "label-value-to-add")
    {
        var storage = StorageClient.Create();
        var bucket = storage.GetBucket(bucketName);

        if (bucket.Labels == null)
        {
            bucket.Labels = new Dictionary<string, string>();
        }
        bucket.Labels.Add(labelKey, labelValue);

        bucket = storage.UpdateBucket(bucket);
        Console.WriteLine($"Added label {labelKey} with value {labelValue} to bucket {bucketName}.");
        return bucket;
    }
}

以下示例从存储桶中移除指定的标签：


using Google.Apis.Storage.v1.Data;
using Google.Cloud.Storage.V1;
using System;

public class BucketRemoveLabelSample
{
    public Bucket BucketRemoveLabel(string bucketName = "your-bucket-name", string labelKey = "label-key-to-remove")
    {
        var storage = StorageClient.Create();
        var bucket = storage.GetBucket(bucketName);

        if (bucket.Labels != null && bucket.Labels.Keys.Contains(labelKey))
        {
            bucket.Labels.Remove(labelKey);
            bucket = storage.UpdateBucket(bucket);
            Console.WriteLine($"Removed label {labelKey} from bucket {bucketName}.");
        }
        else
        {
            Console.WriteLine($"No such label available on {bucketName}.");
        }
        return bucket;
    }
}

Go

如需了解详情，请参阅 Cloud Storage Go API 参考文档。

如需向 Cloud Storage 进行身份验证，请设置应用默认凭据。如需了解详情，请参阅为客户端库设置身份验证。

以下示例将指定的标签添加到存储桶，或者修改标签（如果存储桶已存在该标签）：

import (
	"context"
	"fmt"
	"io"
	"time"

	"cloud.google.com/go/storage"
)

// addBucketLabel adds a label on a bucket.
func addBucketLabel(w io.Writer, bucketName, labelName, labelValue string) error {
	// bucketName := "bucket-name"
	// labelName := "label-name"
	// labelValue := "label-value"
	ctx := context.Background()
	client, err := storage.NewClient(ctx)
	if err != nil {
		return fmt.Errorf("storage.NewClient: %w", err)
	}
	defer client.Close()

	ctx, cancel := context.WithTimeout(ctx, time.Second*10)
	defer cancel()

	bucket := client.Bucket(bucketName)
	bucketAttrsToUpdate := storage.BucketAttrsToUpdate{}
	bucketAttrsToUpdate.SetLabel(labelName, labelValue)
	if _, err := bucket.Update(ctx, bucketAttrsToUpdate); err != nil {
		return fmt.Errorf("Bucket(%q).Update: %w", bucketName, err)
	}
	fmt.Fprintf(w, "Added label %q with value %q to bucket %v\n", labelName, labelValue, bucketName)
	return nil
}

以下示例从存储桶中移除指定的标签：

import (
	"context"
	"fmt"
	"io"
	"time"

	"cloud.google.com/go/storage"
)

// removeBucketLabel removes a label on a bucket.
func removeBucketLabel(w io.Writer, bucketName, labelName string) error {
	// bucketName := "bucket-name"
	// labelName := "label-name"
	ctx := context.Background()
	client, err := storage.NewClient(ctx)
	if err != nil {
		return fmt.Errorf("storage.NewClient: %w", err)
	}
	defer client.Close()

	ctx, cancel := context.WithTimeout(ctx, time.Second*10)
	defer cancel()

	bucket := client.Bucket(bucketName)
	bucketAttrsToUpdate := storage.BucketAttrsToUpdate{}
	bucketAttrsToUpdate.DeleteLabel(labelName)
	if _, err := bucket.Update(ctx, bucketAttrsToUpdate); err != nil {
		return fmt.Errorf("Bucket(%q).Update: %w", bucketName, err)
	}
	fmt.Fprintf(w, "Removed label %q from bucket %v\n", labelName, bucketName)
	return nil
}

Java

如需了解详情，请参阅 Cloud Storage Java API 参考文档。

如需向 Cloud Storage 进行身份验证，请设置应用默认凭据。如需了解详情，请参阅为客户端库设置身份验证。

以下示例将指定的标签添加到存储桶，或者修改标签（如果存储桶已存在该标签）：


import com.google.cloud.storage.Bucket;
import com.google.cloud.storage.Storage;
import com.google.cloud.storage.StorageOptions;
import java.util.HashMap;
import java.util.Map;

public class AddBucketLabel {
  public static void addBucketLabel(
      String projectId, String bucketName, String labelKey, String labelValue) {
    // The ID of your GCP project
    // String projectId = "your-project-id";

    // The ID of your GCS bucket
    // String bucketName = "your-unique-bucket-name";

    // The key of the label to add
    // String labelKey = "label-key-to-add";

    // The value of the label to add
    // String labelValue = "label-value-to-add";

    Map<String, String> newLabels = new HashMap<>();
    newLabels.put(labelKey, labelValue);

    Storage storage = StorageOptions.newBuilder().setProjectId(projectId).build().getService();
    Bucket bucket = storage.get(bucketName);
    Map<String, String> labels = bucket.getLabels();
    if (labels != null) {
      newLabels.putAll(labels);
    }
    bucket.toBuilder().setLabels(newLabels).build().update();

    System.out.println(
        "Added label " + labelKey + " with value " + labelValue + " to bucket " + bucketName + ".");
  }
}

以下示例从存储桶中移除指定的标签：


import com.google.cloud.storage.Bucket;
import com.google.cloud.storage.Storage;
import com.google.cloud.storage.StorageOptions;
import java.util.HashMap;
import java.util.Map;

public class RemoveBucketLabel {
  public static void removeBucketLabel(String projectId, String bucketName, String labelKey) {
    // The ID of your GCP project
    // String projectId = "your-project-id";

    // The ID of your GCS bucket
    // String bucketName = "your-unique-bucket-name";

    // The key of the label to remove from the bucket
    // String labelKey = "label-key-to-remove";

    Storage storage = StorageOptions.newBuilder().setProjectId(projectId).build().getService();

    Map<String, String> labelsToRemove = new HashMap<>();
    labelsToRemove.put(labelKey, null);

    Bucket bucket = storage.get(bucketName);
    Map<String, String> labels;
    if (bucket.getLabels() == null) {
      labels = new HashMap<>();
    } else {
      labels = new HashMap(bucket.getLabels());
    }
    labels.putAll(labelsToRemove);
    bucket.toBuilder().setLabels(labels).build().update();

    System.out.println("Removed label " + labelKey + " from bucket " + bucketName);
  }
}

Node.js

如需了解详情，请参阅 Cloud Storage Node.js API 参考文档。

如需向 Cloud Storage 进行身份验证，请设置应用默认凭据。如需了解详情，请参阅为客户端库设置身份验证。

以下示例将指定的标签添加到存储桶，或者修改标签（如果存储桶已存在该标签）：

/**
 * TODO(developer): Uncomment the following lines before running the sample.
 */
// The ID of your GCS bucket
// const bucketName = 'your-unique-bucket-name';

// The key of the label to add
// const labelKey = 'label-key-to-add';

// The value of the label to add
// const labelValue = 'label-value-to-add';

// Imports the Google Cloud client library
const {Storage} = require('@google-cloud/storage');

// Creates a client
const storage = new Storage();

const labels = {
  [labelKey]: labelValue,
};

async function addBucketLabel() {
  await storage.bucket(bucketName).setMetadata({labels});
  console.log(`Added label to bucket ${bucketName}`);
}

addBucketLabel().catch(console.error);

以下示例从存储桶中移除指定的标签：

/**
 * TODO(developer): Uncomment the following lines before running the sample.
 */
// The ID of your GCS bucket
// const bucketName = 'your-unique-bucket-name';

// The key of the label to remove from the bucket
// const labelKey = 'label-key-to-remove';

// Imports the Google Cloud client library
const {Storage} = require('@google-cloud/storage');

// Creates a client
const storage = new Storage();

async function removeBucketLabel() {
  const labels = {};
  // To remove a label set the value of the key to null.
  labels[labelKey] = null;
  await storage.bucket(bucketName).setMetadata({labels});
  console.log(`Removed labels from bucket ${bucketName}`);
}

removeBucketLabel().catch(console.error);

PHP

如需了解详情，请参阅 Cloud Storage PHP API 参考文档。

如需向 Cloud Storage 进行身份验证，请设置应用默认凭据。如需了解详情，请参阅为客户端库设置身份验证。

以下示例将指定的标签添加到存储桶，或者修改标签（如果存储桶已存在该标签）：

use Google\Cloud\Storage\StorageClient;

/**
 * Adds or updates a bucket label.
 *
 * @param string $bucketName The name of your Cloud Storage bucket.
 *        (e.g. 'my-bucket')
 * @param string $labelName The name of the label to add.
 *        (e.g. 'label-key-to-add')
 * @param string $labelValue The value of the label to add.
 *        (e.g. 'label-value-to-add')
 */
function add_bucket_label(string $bucketName, string $labelName, string $labelValue): void
{
    $storage = new StorageClient();
    $bucket = $storage->bucket($bucketName);
    $newLabels = [$labelName => $labelValue];
    $bucket->update(['labels' => $newLabels]);
    printf('Added label %s (%s) to %s' . PHP_EOL, $labelName, $labelValue, $bucketName);
}

以下示例从存储桶中移除指定的标签：

use Google\Cloud\Storage\StorageClient;

/**
 * Removes a label from a bucket.
 *
 * @param string $bucketName The name of your Cloud Storage bucket.
 *        (e.g. 'my-bucket')
 * @param string $labelName The name of the label to remove.
 *        (e.g. 'label-key-to-remove')
 */
function remove_bucket_label(string $bucketName, string $labelName): void
{
    $storage = new StorageClient();
    $bucket = $storage->bucket($bucketName);
    $labels = [$labelName => null];
    $bucket->update(['labels' => $labels]);
    printf('Removed label %s from %s' . PHP_EOL, $labelName, $bucketName);
}

Python

如需了解详情，请参阅 Cloud Storage Python API 参考文档。

如需向 Cloud Storage 进行身份验证，请设置应用默认凭据。如需了解详情，请参阅为客户端库设置身份验证。

以下示例将指定的标签添加到存储桶，或者修改标签（如果存储桶已存在该标签）：

import pprint

from google.cloud import storage


def add_bucket_label(bucket_name):
    """Add a label to a bucket."""
    # bucket_name = "your-bucket-name"

    storage_client = storage.Client()

    bucket = storage_client.get_bucket(bucket_name)
    labels = bucket.labels
    labels["example"] = "label"
    bucket.labels = labels
    bucket.patch()

    print(f"Updated labels on {bucket.name}.")
    pprint.pprint(bucket.labels)

以下示例从存储桶中移除指定的标签：

import pprint

from google.cloud import storage


def remove_bucket_label(bucket_name):
    """Remove a label from a bucket."""
    # bucket_name = "your-bucket-name"

    storage_client = storage.Client()
    bucket = storage_client.get_bucket(bucket_name)

    labels = bucket.labels

    if "example" in labels:
        del labels["example"]

    bucket.labels = labels
    bucket.patch()

    print(f"Removed labels on {bucket.name}.")
    pprint.pprint(bucket.labels)

Ruby

如需了解详情，请参阅 Cloud Storage Ruby API 参考文档。

如需向 Cloud Storage 进行身份验证，请设置应用默认凭据。如需了解详情，请参阅为客户端库设置身份验证。

以下示例将指定的标签添加到存储桶，或者修改标签（如果存储桶已存在该标签）：

def add_bucket_label bucket_name:, label_key:, label_value:
  # The ID of your GCS bucket
  # bucket_name = "your-unique-bucket-name"

  # The key of the label to add
  # label_key = "label-key-to-add"

  # The value of the label to add
  # label_value = "label-value-to-add"

  require "google/cloud/storage"

  storage = Google::Cloud::Storage.new
  bucket  = storage.bucket bucket_name

  bucket.update do |bucket|
    bucket.labels[label_key] = label_value
  end

  puts "Added label #{label_key} with value #{label_value} to #{bucket_name}"
end

以下示例从存储桶中移除指定的标签：

def remove_bucket_label bucket_name:, label_key:
  # The ID of your GCS bucket
  # bucket_name = "your-unique-bucket-name"

  # The key of the label to remove from the bucket
  # label_key = "label-key-to-remove"

  require "google/cloud/storage"

  storage = Google::Cloud::Storage.new
  bucket  = storage.bucket bucket_name

  bucket.update do |bucket|
    bucket.labels[label_key] = nil
  end

  puts "Deleted label #{label_key} from #{bucket_name}"
end

REST API

JSON API

安装并初始化 gcloud CLI，以便为 Authorization 标头生成访问令牌。

创建一个包含以下信息的 JSON 文件：

{
  "labels": {
    "KEY_1": "VALUE_1"
  }
}

地点

KEY_1 是标签的键名，例如 pet。
VALUE_1 是标签的值，例如 dog。如果您要移除密钥，请使用 null 代替 "<var>VALUE_1</var>"。

使用 cURL 通过 PATCH Bucket 请求调用 JSON API：

curl -X PATCH --data-binary @JSON_FILE_NAME \
  -H "Authorization: Bearer $(gcloud auth print-access-token)" \
  -H "Content-Type: application/json" \
  "https://storage.googleapis.com/storage/v1/b/BUCKET_NAME?fields=labels"

其中：

JSON_FILE_NAME 是您在第 2 步中创建的 JSON 文件的路径。
BUCKET_NAME 是该标签应用于的存储桶的名称，例如 my-bucket。

您可以在请求中添加、修改或移除多个 key:value 对。

XML API

安装并初始化 gcloud CLI，以便为 Authorization 标头生成访问令牌。

创建一个包含以下信息的 XML 文件：

<Tagging>
  <TagSet>
    <Tag>
      <Key>KEY_1</Key>
      <Value>VALUE_1</Value>
    </Tag>
  </TagSet>
</Tagging>

其中：

KEY_1 是标签的键名，例如 pet。
VALUE_1 是标签的值，例如 dog。

请注意，您可以在请求中添加多个 <Tag> 元素。如果您要移除存储桶中的所有标签，请在文件中使用单个空 <Tag> 元素：

<Tagging>
  <TagSet>
    <Tag>
    </Tag>
  </TagSet>
</Tagging>

使用 cURL，通过 PUT Bucket 请求和 tagging 查询字符串参数调用 XML API：
```
curl -X PUT --data-binary @XML_FILE_NAME \
  -H "Authorization: Bearer $(gcloud auth print-access-token)" \
  "https://storage.googleapis.com/BUCKET_NAME?tagging"
```
其中：
- XML_FILE_NAME 是您在第 2 步中创建的 XML 文件的路径。
- BUCKET_NAME 是该标签应用于的存储桶的名称，例如 my-bucket。

查看存储桶标签

控制台

在 Google Cloud 控制台中，进入 Cloud Storage 存储桶页面。
进入“存储桶”
点击您要查看其标签的存储桶的名称。
点击配置标签页。

存储桶字段中列出了在该存储桶上设置的标签。

如需了解如何在 Google Cloud 控制台中获取失败的 Cloud Storage 操作的详细错误信息，请参阅问题排查。

命令行

使用带有 --format 标志的 gcloud storage buckets describe 命令：

gcloud storage buckets describe gs://BUCKET_NAME --format="default(labels)"

其中，BUCKET_NAME 是您要查看其标签的存储桶的名称，例如 my-bucket。

如果成功切存储桶存在标签，则响应类似于以下内容：

labels:
  red-key: ruby
  blue-key: cyan

如果成功但存储桶不存在标签，则响应类似于以下内容：

null

客户端库

C++

如需了解详情，请参阅 Cloud Storage C++ API 参考文档。

如需向 Cloud Storage 进行身份验证，请设置应用默认凭据。如需了解详情，请参阅为客户端库设置身份验证。

如需查看存储桶的标签，请按照显示存储桶的元数据中的说明操作，并在响应中查找标签字段。

namespace gcs = ::google::cloud::storage;
using ::google::cloud::StatusOr;
[](gcs::Client client, std::string const& bucket_name) {
  StatusOr<gcs::BucketMetadata> bucket_metadata =
      client.GetBucketMetadata(bucket_name);
  if (!bucket_metadata) throw std::move(bucket_metadata).status();

  std::cout << "The metadata for bucket " << bucket_metadata->name() << " is "
            << *bucket_metadata << "\n";
}

C#

如需了解详情，请参阅 Cloud Storage C# API 参考文档。

如需向 Cloud Storage 进行身份验证，请设置应用默认凭据。如需了解详情，请参阅为客户端库设置身份验证。

如需查看存储桶的标签，请按照显示存储桶的元数据中的说明操作，并在响应中查找标签字段。


using Google.Apis.Storage.v1.Data;
using Google.Cloud.Storage.V1;
using System;

public class GetBucketMetadataSample
{
    public Bucket GetBucketMetadata(string bucketName = "your-unique-bucket-name")
    {
        var storage = StorageClient.Create();
        var bucket = storage.GetBucket(bucketName, new GetBucketOptions { Projection = Projection.Full });
        Console.WriteLine($"Bucket:\t{bucket.Name}");
        Console.WriteLine($"Acl:\t{bucket.Acl}");
        Console.WriteLine($"Billing:\t{bucket.Billing}");
        Console.WriteLine($"Cors:\t{bucket.Cors}");
        Console.WriteLine($"DefaultEventBasedHold:\t{bucket.DefaultEventBasedHold}");
        Console.WriteLine($"DefaultObjectAcl:\t{bucket.DefaultObjectAcl}");
        Console.WriteLine($"Encryption:\t{bucket.Encryption}");
        if (bucket.Encryption != null)
        {
            Console.WriteLine($"KmsKeyName:\t{bucket.Encryption.DefaultKmsKeyName}");
        }
        Console.WriteLine($"Id:\t{bucket.Id}");
        Console.WriteLine($"Kind:\t{bucket.Kind}");
        Console.WriteLine($"Lifecycle:\t{bucket.Lifecycle}");
        Console.WriteLine($"Location:\t{bucket.Location}");
        Console.WriteLine($"LocationType:\t{bucket.LocationType}");
        Console.WriteLine($"Logging:\t{bucket.Logging}");
        Console.WriteLine($"Metageneration:\t{bucket.Metageneration}");
        Console.WriteLine($"ObjectRetention:\t{bucket.ObjectRetention}");
        Console.WriteLine($"Owner:\t{bucket.Owner}");
        Console.WriteLine($"ProjectNumber:\t{bucket.ProjectNumber}");
        Console.WriteLine($"RetentionPolicy:\t{bucket.RetentionPolicy}");
        Console.WriteLine($"SelfLink:\t{bucket.SelfLink}");
        Console.WriteLine($"StorageClass:\t{bucket.StorageClass}");
        Console.WriteLine($"TimeCreated:\t{bucket.TimeCreated}");
        Console.WriteLine($"Updated:\t{bucket.Updated}");
        Console.WriteLine($"Versioning:\t{bucket.Versioning}");
        Console.WriteLine($"Website:\t{bucket.Website}");
        Console.WriteLine($"TurboReplication:\t{bucket.Rpo}");
        if (bucket.Labels != null)
        {
            Console.WriteLine("Labels:");
            foreach (var label in bucket.Labels)
            {
                Console.WriteLine($"{label.Key}:\t{label.Value}");
            }
        }
        return bucket;
    }
}

Go

如需了解详情，请参阅 Cloud Storage Go API 参考文档。

如需向 Cloud Storage 进行身份验证，请设置应用默认凭据。如需了解详情，请参阅为客户端库设置身份验证。

如需查看存储桶的标签，请按照显示存储桶的元数据中的说明操作，并在响应中查找标签字段。

import (
	"context"
	"fmt"
	"io"
	"time"

	"cloud.google.com/go/storage"
)

// getBucketMetadata gets the bucket metadata.
func getBucketMetadata(w io.Writer, bucketName string) (*storage.BucketAttrs, error) {
	// bucketName := "bucket-name"
	ctx := context.Background()
	client, err := storage.NewClient(ctx)
	if err != nil {
		return nil, fmt.Errorf("storage.NewClient: %w", err)
	}
	defer client.Close()

	ctx, cancel := context.WithTimeout(ctx, time.Second*10)
	defer cancel()
	attrs, err := client.Bucket(bucketName).Attrs(ctx)
	if err != nil {
		return nil, fmt.Errorf("Bucket(%q).Attrs: %w", bucketName, err)
	}
	fmt.Fprintf(w, "BucketName: %v\n", attrs.Name)
	fmt.Fprintf(w, "Location: %v\n", attrs.Location)
	fmt.Fprintf(w, "LocationType: %v\n", attrs.LocationType)
	fmt.Fprintf(w, "StorageClass: %v\n", attrs.StorageClass)
	fmt.Fprintf(w, "Turbo replication (RPO): %v\n", attrs.RPO)
	fmt.Fprintf(w, "TimeCreated: %v\n", attrs.Created)
	fmt.Fprintf(w, "Metageneration: %v\n", attrs.MetaGeneration)
	fmt.Fprintf(w, "PredefinedACL: %v\n", attrs.PredefinedACL)
	if attrs.Encryption != nil {
		fmt.Fprintf(w, "DefaultKmsKeyName: %v\n", attrs.Encryption.DefaultKMSKeyName)
	}
	if attrs.Website != nil {
		fmt.Fprintf(w, "IndexPage: %v\n", attrs.Website.MainPageSuffix)
		fmt.Fprintf(w, "NotFoundPage: %v\n", attrs.Website.NotFoundPage)
	}
	fmt.Fprintf(w, "DefaultEventBasedHold: %v\n", attrs.DefaultEventBasedHold)
	if attrs.RetentionPolicy != nil {
		fmt.Fprintf(w, "RetentionEffectiveTime: %v\n", attrs.RetentionPolicy.EffectiveTime)
		fmt.Fprintf(w, "RetentionPeriod: %v\n", attrs.RetentionPolicy.RetentionPeriod)
		fmt.Fprintf(w, "RetentionPolicyIsLocked: %v\n", attrs.RetentionPolicy.IsLocked)
	}
	fmt.Fprintf(w, "ObjectRetentionMode: %v\n", attrs.ObjectRetentionMode)
	fmt.Fprintf(w, "RequesterPays: %v\n", attrs.RequesterPays)
	fmt.Fprintf(w, "VersioningEnabled: %v\n", attrs.VersioningEnabled)
	if attrs.Logging != nil {
		fmt.Fprintf(w, "LogBucket: %v\n", attrs.Logging.LogBucket)
		fmt.Fprintf(w, "LogObjectPrefix: %v\n", attrs.Logging.LogObjectPrefix)
	}
	if attrs.CORS != nil {
		fmt.Fprintln(w, "CORS:")
		for _, v := range attrs.CORS {
			fmt.Fprintf(w, "\tMaxAge: %v\n", v.MaxAge)
			fmt.Fprintf(w, "\tMethods: %v\n", v.Methods)
			fmt.Fprintf(w, "\tOrigins: %v\n", v.Origins)
			fmt.Fprintf(w, "\tResponseHeaders: %v\n", v.ResponseHeaders)
		}
	}
	if attrs.Labels != nil {
		fmt.Fprintf(w, "\n\n\nLabels:")
		for key, value := range attrs.Labels {
			fmt.Fprintf(w, "\t%v = %v\n", key, value)
		}
	}
	return attrs, nil
}

Java

如需了解详情，请参阅 Cloud Storage Java API 参考文档。

如需向 Cloud Storage 进行身份验证，请设置应用默认凭据。如需了解详情，请参阅为客户端库设置身份验证。

如需查看存储桶的标签，请按照显示存储桶的元数据中的说明操作，并在响应中查找标签字段。


import com.google.cloud.storage.Bucket;
import com.google.cloud.storage.BucketInfo;
import com.google.cloud.storage.Storage;
import com.google.cloud.storage.StorageOptions;
import java.util.Map;

public class GetBucketMetadata {
  public static void getBucketMetadata(String projectId, String bucketName) {
    // The ID of your GCP project
    // String projectId = "your-project-id";

    // The ID of your GCS bucket
    // String bucketName = "your-unique-bucket-name";

    Storage storage = StorageOptions.newBuilder().setProjectId(projectId).build().getService();

    // Select all fields. Fields can be selected individually e.g. Storage.BucketField.NAME
    Bucket bucket =
        storage.get(bucketName, Storage.BucketGetOption.fields(Storage.BucketField.values()));

    // Print bucket metadata
    System.out.println("BucketName: " + bucket.getName());
    System.out.println("DefaultEventBasedHold: " + bucket.getDefaultEventBasedHold());
    System.out.println("DefaultKmsKeyName: " + bucket.getDefaultKmsKeyName());
    System.out.println("Id: " + bucket.getGeneratedId());
    System.out.println("IndexPage: " + bucket.getIndexPage());
    System.out.println("Location: " + bucket.getLocation());
    System.out.println("LocationType: " + bucket.getLocationType());
    System.out.println("Metageneration: " + bucket.getMetageneration());
    System.out.println("NotFoundPage: " + bucket.getNotFoundPage());
    System.out.println("RetentionEffectiveTime: " + bucket.getRetentionEffectiveTime());
    System.out.println("RetentionPeriod: " + bucket.getRetentionPeriod());
    System.out.println("RetentionPolicyIsLocked: " + bucket.retentionPolicyIsLocked());
    System.out.println("RequesterPays: " + bucket.requesterPays());
    System.out.println("SelfLink: " + bucket.getSelfLink());
    System.out.println("StorageClass: " + bucket.getStorageClass().name());
    System.out.println("TimeCreated: " + bucket.getCreateTime());
    System.out.println("VersioningEnabled: " + bucket.versioningEnabled());
    System.out.println("ObjectRetention: " + bucket.getObjectRetention());
    if (bucket.getLabels() != null) {
      System.out.println("\n\n\nLabels:");
      for (Map.Entry<String, String> label : bucket.getLabels().entrySet()) {
        System.out.println(label.getKey() + "=" + label.getValue());
      }
    }
    if (bucket.getLifecycleRules() != null) {
      System.out.println("\n\n\nLifecycle Rules:");
      for (BucketInfo.LifecycleRule rule : bucket.getLifecycleRules()) {
        System.out.println(rule);
      }
    }
  }
}

Node.js

如需了解详情，请参阅 Cloud Storage Node.js API 参考文档。

如需向 Cloud Storage 进行身份验证，请设置应用默认凭据。如需了解详情，请参阅为客户端库设置身份验证。

如需查看存储桶的标签，请按照显示存储桶的元数据中的说明操作，并在响应中查找标签字段。

// Imports the Google Cloud client library
const {Storage} = require('@google-cloud/storage');

// Creates a client
const storage = new Storage();

async function getBucketMetadata() {
  /**
   * TODO(developer): Uncomment the following lines before running the sample.
   */
  // The ID of your GCS bucket
  // const bucketName = 'your-unique-bucket-name';

  // Get Bucket Metadata
  const [metadata] = await storage.bucket(bucketName).getMetadata();

  console.log(JSON.stringify(metadata, null, 2));
}

PHP

如需了解详情，请参阅 Cloud Storage PHP API 参考文档。

如需向 Cloud Storage 进行身份验证，请设置应用默认凭据。如需了解详情，请参阅为客户端库设置身份验证。

如需查看存储桶的标签，请按照显示存储桶的元数据中的说明操作，并在响应中查找标签字段。

use Google\Cloud\Storage\StorageClient;

/**
 * Get bucket metadata.
 *
 * @param string $bucketName The name of your Cloud Storage bucket.
 *        (e.g. 'my-bucket')
 */
function get_bucket_metadata(string $bucketName): void
{
    $storage = new StorageClient();
    $bucket = $storage->bucket($bucketName);
    $info = $bucket->info();

    printf('Bucket Metadata: %s' . PHP_EOL, print_r($info));
}

Python

如需了解详情，请参阅 Cloud Storage Python API 参考文档。

如需向 Cloud Storage 进行身份验证，请设置应用默认凭据。如需了解详情，请参阅为客户端库设置身份验证。

如需查看存储桶的标签，请按照显示存储桶的元数据中的说明操作，并在响应中查找标签字段。


from google.cloud import storage


def bucket_metadata(bucket_name):
    """Prints out a bucket's metadata."""
    # bucket_name = 'your-bucket-name'

    storage_client = storage.Client()
    bucket = storage_client.get_bucket(bucket_name)

    print(f"ID: {bucket.id}")
    print(f"Name: {bucket.name}")
    print(f"Storage Class: {bucket.storage_class}")
    print(f"Location: {bucket.location}")
    print(f"Location Type: {bucket.location_type}")
    print(f"Cors: {bucket.cors}")
    print(f"Default Event Based Hold: {bucket.default_event_based_hold}")
    print(f"Default KMS Key Name: {bucket.default_kms_key_name}")
    print(f"Metageneration: {bucket.metageneration}")
    print(
        f"Public Access Prevention: {bucket.iam_configuration.public_access_prevention}"
    )
    print(f"Retention Effective Time: {bucket.retention_policy_effective_time}")
    print(f"Retention Period: {bucket.retention_period}")
    print(f"Retention Policy Locked: {bucket.retention_policy_locked}")
    print(f"Object Retention Mode: {bucket.object_retention_mode}")
    print(f"Requester Pays: {bucket.requester_pays}")
    print(f"Self Link: {bucket.self_link}")
    print(f"Time Created: {bucket.time_created}")
    print(f"Versioning Enabled: {bucket.versioning_enabled}")
    print(f"Labels: {bucket.labels}")

Ruby

如需了解详情，请参阅 Cloud Storage Ruby API 参考文档。

如需向 Cloud Storage 进行身份验证，请设置应用默认凭据。如需了解详情，请参阅为客户端库设置身份验证。

如需查看存储桶的标签，请按照显示存储桶的元数据中的说明操作，并在响应中查找标签字段。

def get_bucket_metadata bucket_name:
  # The ID of your GCS bucket
  # bucket_name = "your-unique-bucket-name"

  require "google/cloud/storage"

  storage = Google::Cloud::Storage.new
  bucket  = storage.bucket bucket_name

  puts "ID:                       #{bucket.id}"
  puts "Name:                     #{bucket.name}"
  puts "Storage Class:            #{bucket.storage_class}"
  puts "Location:                 #{bucket.location}"
  puts "Location Type:            #{bucket.location_type}"
  puts "Cors:                     #{bucket.cors}"
  puts "Default Event Based Hold: #{bucket.default_event_based_hold?}"
  puts "Default KMS Key Name:     #{bucket.default_kms_key}"
  puts "Logging Bucket:           #{bucket.logging_bucket}"
  puts "Logging Prefix:           #{bucket.logging_prefix}"
  puts "Metageneration:           #{bucket.metageneration}"
  puts "Retention Effective Time: #{bucket.retention_effective_at}"
  puts "Retention Period:         #{bucket.retention_period}"
  puts "Retention Policy Locked:  #{bucket.retention_policy_locked?}"
  puts "Requester Pays:           #{bucket.requester_pays}"
  puts "Self Link:                #{bucket.api_url}"
  puts "Time Created:             #{bucket.created_at}"
  puts "Versioning Enabled:       #{bucket.versioning?}"
  puts "Index Page:               #{bucket.website_main}"
  puts "Not Found Page:           #{bucket.website_404}"
  puts "Labels:"
  bucket.labels.each do |key, value|
    puts " - #{key} = #{value}"
  end
  puts "Lifecycle Rules:"
  bucket.lifecycle.each do |rule|
    puts "#{rule.action} - #{rule.storage_class} - #{rule.age} - #{rule.matches_storage_class}"
  end
end

REST API

JSON API

安装并初始化 gcloud CLI，以便为 Authorization 标头生成访问令牌。

使用 cURL，通过包含 fields=labels 查询字符串参数的 GET Bucket 请求调用 JSON API：
```
curl -X GET \
  -H "Authorization: Bearer $(gcloud auth print-access-token)" \
  "https://storage.googleapis.com/storage/v1/b/BUCKET_NAME?fields=labels"
```
其中，BUCKET_NAME 是您要查看其标签的存储桶的名称，例如 my-bucket。

响应如下例所示：

{
  "labels" : {
     (your_label_key): your_label_value
   },
}

XML API

安装并初始化 gcloud CLI，以便为 Authorization 标头生成访问令牌。

使用 cURL，通过 GET Bucket 请求和 tagging 查询字符串参数调用 XML API：
```
curl -X GET \
  -H "Authorization: Bearer $(gcloud auth print-access-token)" \
  "https://storage.googleapis.com/BUCKET_NAME?tagging"
```
其中，BUCKET_NAME 是您要查看其标签的存储桶的名称，例如 my-bucket。

响应如下例所示：

<Tagging>
  <TagSet>
    <Tag>
      <Key>your_label_key</Key>
      <Value>your_label_value</Value>
    </Tag>
  </TagSet>
</Tagging>

后续步骤

了解存储桶标记。
获取其他存储桶元数据。