Using object holds

Go to concepts

This page describes how to use object holds, including placing holds by default on new objects and placing holds on individual objects.

Prerequisites

Before using this feature in Cloud Storage, you should:

1. Have sufficient permission to view and update buckets and objects in Cloud Storage:

   • If you own the project that contains the bucket, you most likely have the necessary permissions.

   • If you use IAM, you should have storage.buckets.update, storage.buckets.get, storage.objects.update, and storage.objects.get permissions on the relevant bucket. See Using IAM Permissions for instructions on how to get a role, such as Storage Admin, that has these permissions.

   • If you use ACLs, you should have OWNER permission on the relevant bucket and on the objects within it. See Setting ACLs for instructions on how to do this.

Working with the default event-based hold property

The following tasks show you how to set and view the default event-based hold property on a bucket. When this property is enabled, new objects added to the bucket automatically get an event-based hold placed on them.

Setting the default event-based hold property

To enable or disable the default event-based hold property for a bucket:

Console

1. In the Google Cloud Console, go to the Cloud Storage Browser page.
   

   Go to Browser

2. In the list of buckets, click on the name of the bucket that you want to set the default event-based hold property for.

3. Select the Retention tab near the top of the page.

   The current status for the bucket appears in the Default event-based hold option section.

4. In the Default event-based hold option section, click the current status to change it.

   The status appears as either Enabled or Disabled.

To learn how to get detailed error information about failed operations in the Cloud Storage browser, see Troubleshooting.

gsutil

Use the gsutil retention event-default command:

gsutil retention event-default STATE gs://BUCKET_NAME

Where:

• STATE is either set to use default event-based holds or release to not use default event-based holds.

• BUCKET_NAME is the name of the relevant bucket. For example, my-bucket.

Code samples

C++

For more information, see the Cloud Storage C++ API reference documentation.

The following sample enables default event-based holds on a bucket:

View on GitHub Feedback

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

  if (!original) throw std::runtime_error(original.status().message());
  StatusOr<gcs::BucketMetadata> patched_metadata = client.PatchBucket(
      bucket_name,
      gcs::BucketMetadataPatchBuilder().SetDefaultEventBasedHold(true),
      gcs::IfMetagenerationMatch(original->metageneration()));

  if (!patched_metadata) {
    throw std::runtime_error(patched_metadata.status().message());
  }

  std::cout << "The default event-based hold for objects in bucket "
            << bucket_name << " is "
            << (patched_metadata->default_event_based_hold() ? "enabled"
                                                             : "disabled")
            << "\n";
}

The following sample disables default event-based holds on a bucket:

View on GitHub Feedback

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

  if (!original) throw std::runtime_error(original.status().message());
  StatusOr<gcs::BucketMetadata> patched_metadata = client.PatchBucket(
      bucket_name,
      gcs::BucketMetadataPatchBuilder().SetDefaultEventBasedHold(false),
      gcs::IfMetagenerationMatch(original->metageneration()));

  if (!patched_metadata) {
    throw std::runtime_error(patched_metadata.status().message());
  }

  std::cout << "The default event-based hold for objects in bucket "
            << bucket_name << " is "
            << (patched_metadata->default_event_based_hold() ? "enabled"
                                                             : "disabled")
            << "\n";
}

C#

For more information, see the Cloud Storage C# API reference documentation.

The following sample enables default event-based holds on a bucket:

View on GitHub Feedback

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

public class EnableBucketDefaultEventBasedHoldSample
{
    public Bucket EnableBucketDefaultEventBasedHold(string bucketName = "your-unique-bucket-name")
    {
        var storage = StorageClient.Create();
        var bucket = storage.GetBucket(bucketName);
        bucket.DefaultEventBasedHold = true;
        bucket = storage.UpdateBucket(bucket);
        Console.WriteLine($"Default event-based hold was enabled for {bucketName}");
        return bucket;
    }
}

The following sample disables default event-based holds on a bucket:

View on GitHub Feedback

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

public class DisableDefaultEventBasedHoldSample
{
    public Bucket DisableDefaultEventBasedHold(string bucketName = "your-unique-bucket-name")
    {
        var storage = StorageClient.Create();
        var bucket = storage.GetBucket(bucketName);
        bucket.DefaultEventBasedHold = false;
        bucket = storage.UpdateBucket(bucket);
        Console.WriteLine($"Default event-based hold was disabled for {bucketName}");
        return bucket;
    }
}

Go

For more information, see the Cloud Storage Go API reference documentation.

The following sample enables default event-based holds on a bucket:

View on GitHub Feedback

ctx := context.Background()

bucket := c.Bucket(bucketName)
bucketAttrsToUpdate := storage.BucketAttrsToUpdate{
	DefaultEventBasedHold: true,
}
ctx, cancel := context.WithTimeout(ctx, time.Second*10)
defer cancel()
if _, err := bucket.Update(ctx, bucketAttrsToUpdate); err != nil {
	return err
}

The following sample disables default event-based holds on a bucket:

View on GitHub Feedback

ctx := context.Background()

bucket := c.Bucket(bucketName)
bucketAttrsToUpdate := storage.BucketAttrsToUpdate{
	DefaultEventBasedHold: false,
}
ctx, cancel := context.WithTimeout(ctx, time.Second*10)
defer cancel()
if _, err := bucket.Update(ctx, bucketAttrsToUpdate); err != nil {
	return err
}

Java

For more information, see the Cloud Storage Java API reference documentation.

The following sample enables default event-based holds on a bucket:

View on GitHub Feedback

// Instantiate a Google Cloud Storage client
Storage storage = StorageOptions.getDefaultInstance().getService();

// The name of a bucket, e.g. "my-bucket"
// String bucketName = "my-bucket";

Bucket bucket =
    storage.update(BucketInfo.newBuilder(bucketName).setDefaultEventBasedHold(true).build());

System.out.println("Default event-based hold was enabled for " + bucketName);

The following sample disables default event-based holds on a bucket:

View on GitHub Feedback

// Instantiate a Google Cloud Storage client
Storage storage = StorageOptions.getDefaultInstance().getService();

// The name of a bucket, e.g. "my-bucket"
// String bucketName = "my-bucket";

Bucket bucket =
    storage.update(BucketInfo.newBuilder(bucketName).setDefaultEventBasedHold(false).build());

System.out.println("Default event-based hold was disabled for " + bucketName);

Node.js

For more information, see the Cloud Storage Node.js API reference documentation.

The following sample enables default event-based holds on a bucket:

View on GitHub Feedback

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

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

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

async function enableDefaultEventBasedHold() {
  // Enables a default event-based hold for the bucket.
  await storage.bucket(bucketName).setMetadata({
    defaultEventBasedHold: true,
  });

  console.log(`Default event-based hold was enabled for ${bucketName}.`);
}

enableDefaultEventBasedHold().catch(console.error);

The following sample disables default event-based holds on a bucket:

View on GitHub Feedback

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

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

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

async function disableDefaultEventBasedHold() {
  // Disables a default event-based hold for a bucket.
  await storage.bucket(bucketName).setMetadata({
    defaultEventBasedHold: false,
  });
  console.log(`Default event-based hold was disabled for ${bucketName}.`);
}

disableDefaultEventBasedHold().catch(console.error);

PHP

For more information, see the Cloud Storage PHP API reference documentation.

The following sample enables default event-based holds on a bucket:

View on GitHub Feedback

use Google\Cloud\Storage\StorageClient;

/**
 * Enables a default event-based hold for a bucket.
 *
 * @param string $bucketName The name of your Cloud Storage bucket.
 */
function enable_default_event_based_hold($bucketName)
{
    // $bucketName = 'my-bucket';

    $storage = new StorageClient();
    $bucket = $storage->bucket($bucketName);
    $bucket->update(['defaultEventBasedHold' => true]);
    printf('Default event-based hold was enabled for %s' . PHP_EOL, $bucketName);
}

The following sample disables default event-based holds on a bucket:

View on GitHub Feedback

use Google\Cloud\Storage\StorageClient;

/**
 * Disables a default event-based hold for a bucket.
 *
 * @param string $bucketName The name of your Cloud Storage bucket.
 */
function disable_default_event_based_hold($bucketName)
{
    // $bucketName = 'my-bucket';

    $storage = new StorageClient();
    $bucket = $storage->bucket($bucketName);
    $bucket->update(['defaultEventBasedHold' => false]);
    printf('Default event-based hold was disabled for %s' . PHP_EOL, $bucketName);
}

Python

For more information, see the Cloud Storage Python API reference documentation.

The following sample enables default event-based holds on a bucket:

View on GitHub Feedback

from google.cloud import storage


def enable_default_event_based_hold(bucket_name):
    """Enables the default event based hold on a given bucket"""
    # bucket_name = "my-bucket"

    storage_client = storage.Client()

    bucket = storage_client.bucket(bucket_name)
    bucket.default_event_based_hold = True
    bucket.patch()

    print("Default event based hold was enabled for {}".format(bucket_name))

The following sample disables default event-based holds on a bucket:

View on GitHub Feedback

from google.cloud import storage


def disable_default_event_based_hold(bucket_name):
    """Disables the default event based hold on a given bucket"""
    # bucket_name = "my-bucket"

    storage_client = storage.Client()

    bucket = storage_client.get_bucket(bucket_name)
    bucket.default_event_based_hold = False
    bucket.patch()

    print("Default event based hold was disabled for {}".format(bucket_name))

Ruby

For more information, see the Cloud Storage Ruby API reference documentation.

The following sample enables default event-based holds on a bucket:

View on GitHub Feedback

def enable_default_event_based_hold 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

  bucket.update do |b|
    b.default_event_based_hold = true
  end

  puts "Default event-based hold was enabled for #{bucket_name}."
end

The following sample disables default event-based holds on a bucket:

View on GitHub Feedback

def disable_default_event_based_hold 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

  bucket.update do |b|
    b.default_event_based_hold = false
  end

  puts "Default event-based hold was disabled for #{bucket_name}."
end

REST APIs

JSON API

1. Get an authorization access token from the OAuth 2.0 Playground. Configure the playground to use your own OAuth credentials.

2. Create a .json file that contains the following information:

   {
     "defaultEventBasedHold": STATE
   }

   Where STATE is either true or false.

3. Use cURL to call the JSON API with a PATCH Bucket request:

   curl -X PATCH --data-binary @JSON_FILE_NAME.json \
   -H "Authorization: Bearer OAUTH2_TOKEN" \
   -H "Content-Type: application/json" \
   "https://storage.googleapis.com/storage/v1/b/BUCKET_NAME?fields=defaultEventBasedHold"

   Where:

   • JSON_FILE_NAME is the name of the file you created in Step 2.
   • OAUTH2_TOKEN is the access token you generated in Step 1.
   • BUCKET_NAME is the name of the relevant bucket. For example, my-bucket.

XML API

The XML API cannot be used to work with object holds. Use one of the other Cloud Storage tools, such as gsutil, instead.

Getting the default hold status of a bucket

To view whether a bucket places event-based holds on new objects by default:

Console

1. In the Google Cloud Console, go to the Cloud Storage Browser page.
   

   Go to Browser

2. In the list of buckets, click on the name of the bucket that you want to check the default event-based status for.

3. Select the Retention tab near the top of the page.

4. The status appears in the Default event-based hold option section.

To learn how to get detailed error information about failed operations in the Cloud Storage browser, see Troubleshooting.

gsutil

Use the following gsutil ls command:

gsutil ls -L -b gs://BUCKET_NAME

Where BUCKET_NAME is the name of the relevant bucket. For example, my-bucket.

The response looks like the following example:

gs://my-bucket/ :
  Storage class:         STANDARD
  ...
  ...
  Default Event-Based Hold: True
  ...

If the bucket does not place event-based holds on new objects by default, gsutil omits Default Event-Based Hold from the output entirely.

Code samples

C++

For more information, see the Cloud Storage C++ API reference documentation.

View on GitHub Feedback

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::runtime_error(bucket_metadata.status().message());
  }

  std::cout << "The default event-based hold for objects in bucket "
            << bucket_metadata->name() << " is "
            << (bucket_metadata->default_event_based_hold() ? "enabled"
                                                            : "disabled")
            << "\n";
}

C#

For more information, see the Cloud Storage C# API reference documentation.

View on GitHub Feedback

using Google.Cloud.Storage.V1;
using System;

public class GetDefaultEventBasedHoldSample
{
    public bool GetDefaultEventBasedHold(string bucketName = "your-unique-bucket-name")
    {
        var storage = StorageClient.Create();
        var bucket = storage.GetBucket(bucketName);
        bool defaultEventBasedHold = bucket.DefaultEventBasedHold ?? false;
        Console.WriteLine($"Default event-based hold: {defaultEventBasedHold}");
        return defaultEventBasedHold;
    }
}

Go

For more information, see the Cloud Storage Go API reference documentation.

View on GitHub Feedback

ctx := context.Background()

ctx, cancel := context.WithTimeout(ctx, time.Second*10)
defer cancel()
attrs, err := c.Bucket(bucketName).Attrs(ctx)
if err != nil {
	return nil, err
}
log.Printf("Default event-based hold enabled? %t\n",
	attrs.DefaultEventBasedHold)

Java

For more information, see the Cloud Storage Java API reference documentation.

View on GitHub Feedback

// Instantiate a Google Cloud Storage client
Storage storage = StorageOptions.getDefaultInstance().getService();

// The name of a bucket, e.g. "my-bucket"
// String bucketName = "my-bucket";

Bucket bucket =
    storage.get(bucketName, BucketGetOption.fields(BucketField.DEFAULT_EVENT_BASED_HOLD));

if (bucket.getDefaultEventBasedHold() != null && bucket.getDefaultEventBasedHold()) {
  System.out.println("Default event-based hold is enabled for " + bucketName);
} else {
  System.out.println("Default event-based hold is not enabled for " + bucketName);
}

Node.js

For more information, see the Cloud Storage Node.js API reference documentation.

View on GitHub Feedback

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

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

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

async function getDefaultEventBasedHold() {
  const [metadata] = await storage.bucket(bucketName).getMetadata();
  console.log(`Default event-based hold: ${metadata.defaultEventBasedHold}.`);
}

getDefaultEventBasedHold().catch(console.error);

PHP

For more information, see the Cloud Storage PHP API reference documentation.

View on GitHub Feedback

use Google\Cloud\Storage\StorageClient;

/**
 * Enables a default event-based hold for a bucket.
 *
 * @param string $bucketName The name of your Cloud Storage bucket.
 */
function get_default_event_based_hold($bucketName)
{
    // $bucketName = 'my-bucket';

    $storage = new StorageClient();
    $bucket = $storage->bucket($bucketName);

    if ($bucket->info()['defaultEventBasedHold']) {
        printf('Default event-based hold is enabled for ' . $bucketName . PHP_EOL);
    } else {
        printf('Default event-based hold is not enabled for ' . $bucketName . PHP_EOL);
    }
}

Python

For more information, see the Cloud Storage Python API reference documentation.

View on GitHub Feedback

from google.cloud import storage


def get_default_event_based_hold(bucket_name):
    """Gets the default event based hold on a given bucket"""
    # bucket_name = "my-bucket"

    storage_client = storage.Client()

    bucket = storage_client.get_bucket(bucket_name)

    if bucket.default_event_based_hold:
        print("Default event-based hold is enabled for {}".format(bucket_name))
    else:
        print(
            "Default event-based hold is not enabled for {}".format(
                bucket_name
            )
        )

Ruby

For more information, see the Cloud Storage Ruby API reference documentation.

View on GitHub Feedback

def get_default_event_based_hold 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

  if bucket.default_event_based_hold?
    puts "Default event-based hold is enabled for #{bucket_name}."
  else
    puts "Default event-based hold is not enabled for #{bucket_name}."
  end
end

REST APIs

JSON API

1. Get an authorization access token from the OAuth 2.0 Playground. Configure the playground to use your own OAuth credentials.

2. Use cURL to call the JSON API with a GET Bucket request that includes the desired fields:

   curl -X GET -H "Authorization: Bearer OAUTH2_TOKEN" \
   "https://storage.googleapis.com/storage/v1/b/BUCKET_NAME?fields=defaultEventBasedHold"

   Where

   • OAUTH2_TOKEN is the access token you generated in Step 1.
   • BUCKET_NAME is the name of the relevant bucket. For example, my-bucket.

   If the bucket has a default event-based hold enabled for it, the response looks like the following example:

   {
     "retentionPolicy": true
   }

XML API

The XML API cannot be used to work with object holds. Use one of the other Cloud Storage tools, such as gsutil, instead.

Working with object holds

The following tasks show you how to place, view, and release holds on objects.

Placing an object hold

To place a hold on an object in your bucket:

Console

1. In the Google Cloud Console, go to the Cloud Storage Browser page.
   

   Go to Browser

2. In the list of buckets, click on the name of the bucket that has the objects you want to place holds on.

3. Select the checkbox next to the names of objects you want to place holds on.

4. Click the Manage holds button.

   The Manage holds window appears.

5. Select the checkbox for the types of hold you want to place on the selected objects

6. Click Save hold settings.

To learn how to get detailed error information about failed operations in the Cloud Storage browser, see Troubleshooting.

gsutil

Use the gsutil retention command:

gsutil retention HOLD_TYPE set gs://BUCKET_NAME/OBJECT_NAME

Where:

• HOLD_TYPE is the type of hold you want to apply to your object. For example, temp orevent. See Object holds for more information about hold types.
• BUCKET_NAME is the name of the relevant bucket. For example, my-bucket.
• OBJECT_NAME is the name of the relevant object. For example, pets/dog.png.

Code samples

C++

For more information, see the Cloud Storage C++ API reference documentation.

The following sample sets an event-based hold on an object:

google/cloud/storage/examples/storage_object_hold_samples.cc

View on GitHub Feedback

namespace gcs = ::google::cloud::storage;
using ::google::cloud::StatusOr;
[](gcs::Client client, std::string const& bucket_name,
   std::string const& object_name) {
  StatusOr<gcs::ObjectMetadata> original =
      client.GetObjectMetadata(bucket_name, object_name);
  if (!original) throw std::runtime_error(original.status().message());

  StatusOr<gcs::ObjectMetadata> updated = client.PatchObject(
      bucket_name, object_name,
      gcs::ObjectMetadataPatchBuilder().SetEventBasedHold(true),
      gcs::IfMetagenerationMatch(original->metageneration()));
  if (!updated) throw std::runtime_error(updated.status().message());

  std::cout << "The event hold for object " << updated->name()
            << " in bucket " << updated->bucket() << " is "
            << (updated->event_based_hold() ? "enabled" : "disabled") << "\n";
}

The following sample sets a temporary hold on an object:

google/cloud/storage/examples/storage_object_hold_samples.cc

View on GitHub Feedback

namespace gcs = ::google::cloud::storage;
using ::google::cloud::StatusOr;
[](gcs::Client client, std::string const& bucket_name,
   std::string const& object_name) {
  StatusOr<gcs::ObjectMetadata> original =
      client.GetObjectMetadata(bucket_name, object_name);
  if (!original) throw std::runtime_error(original.status().message());

  StatusOr<gcs::ObjectMetadata> updated = client.PatchObject(
      bucket_name, object_name,
      gcs::ObjectMetadataPatchBuilder().SetTemporaryHold(true),
      gcs::IfMetagenerationMatch(original->metageneration()));
  if (!updated) throw std::runtime_error(updated.status().message());

  std::cout << "The temporary hold for object " << updated->name()
            << " in bucket " << updated->bucket() << " is "
            << (updated->temporary_hold() ? "enabled" : "disabled") << "\n";
}

C#

For more information, see the Cloud Storage C# API reference documentation.

The following sample sets an event-based hold on an object:

storage/api/Storage.Samples/SetEventBasedHold.cs

View on GitHub Feedback

using Google.Cloud.Storage.V1;
using System;

public class SetEventBasedHoldSample
{
    public void SetEventBasedHold(
        string bucketName = "your-unique-bucket-name",
        string objectName = "your-object-name")
    {
        var storage = StorageClient.Create();
        var storageObject = storage.GetObject(bucketName, objectName);
        storageObject.EventBasedHold = true;
        storage.UpdateObject(storageObject);
        Console.WriteLine($"Event-based hold was set for {objectName}.");
    }
}

The following sample sets a temporary hold on an object:

storage/api/Storage.Samples/SetTemporaryHold.cs

View on GitHub Feedback

using Google.Cloud.Storage.V1;

public class SetTemporaryHoldSample
{
    public void SetTemporaryHold(
        string bucketName = "your-unique-bucket-name",
        string objectName = "your-object-name")
    {
        var storage = StorageClient.Create();
        var storageObject = storage.GetObject(bucketName, objectName);
        storageObject.TemporaryHold = true;
        storage.UpdateObject(storageObject);
        System.Console.WriteLine($"Temporary hold was set for {objectName}.");
    }
}

Go

For more information, see the Cloud Storage Go API reference documentation.

The following sample sets an event-based hold on an object:

storage/objects/set_event_based_hold.go

View on GitHub Feedback

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

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

// setEventBasedHold sets EventBasedHold flag of an object to true.
func setEventBasedHold(w io.Writer, bucket, object string) error {
	// bucket := "bucket-name"
	// object := "object-name"
	ctx := context.Background()
	client, err := storage.NewClient(ctx)
	if err != nil {
		return fmt.Errorf("storage.NewClient: %v", err)
	}
	defer client.Close()

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

	o := client.Bucket(bucket).Object(object)
	objectAttrsToUpdate := storage.ObjectAttrsToUpdate{
		EventBasedHold: true,
	}
	if _, err := o.Update(ctx, objectAttrsToUpdate); err != nil {
		return fmt.Errorf("Object(%q).Update: %v", object, err)
	}
	fmt.Fprintf(w, "Default event based hold was enabled for %v.\n", object)
	return nil
}

The following sample sets a temporary hold on an object:

storage/objects/set_temporary_hold.go

View on GitHub Feedback

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

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

// setTemporaryHold sets TemporaryHold flag of an object to true.
func setTemporaryHold(w io.Writer, bucket, object string) error {
	// bucket := "bucket-name"
	// object := "object-name"
	ctx := context.Background()
	client, err := storage.NewClient(ctx)
	if err != nil {
		return fmt.Errorf("storage.NewClient: %v", err)
	}
	defer client.Close()

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

	o := client.Bucket(bucket).Object(object)
	objectAttrsToUpdate := storage.ObjectAttrsToUpdate{
		TemporaryHold: true,
	}
	if _, err := o.Update(ctx, objectAttrsToUpdate); err != nil {
		return fmt.Errorf("Object(%q).Update: %v", object, err)
	}
	fmt.Fprintf(w, "Temporary hold was enabled for %v.\n", object)
	return nil
}

Java

For more information, see the Cloud Storage Java API reference documentation.

The following sample sets an event-based hold on an object:

google-cloud-examples/src/main/java/com/google/cloud/examples/storage/snippets/StorageSnippets.java

View on GitHub Feedback

// Instantiate a Google Cloud Storage client
Storage storage = StorageOptions.getDefaultInstance().getService();

// The name of a bucket, e.g. "my-bucket"
// String bucketName = "my-bucket";

// The name of a blob, e.g. "my-blob"
// String blobName = "my-blob";

BlobId blobId = BlobId.of(bucketName, blobName);
Blob blob = storage.update(BlobInfo.newBuilder(blobId).setEventBasedHold(true).build());

System.out.println("Event-based hold was set for " + blobName);

The following sample sets a temporary hold on an object:

google-cloud-examples/src/main/java/com/google/cloud/examples/storage/snippets/StorageSnippets.java

View on GitHub Feedback

// Instantiate a Google Cloud Storage client
Storage storage = StorageOptions.getDefaultInstance().getService();

// The name of a bucket, e.g. "my-bucket"
// String bucketName = "my-bucket";

// The name of a blob, e.g. "my-blob"
// String blobName = "my-blob";

BlobId blobId = BlobId.of(bucketName, blobName);
Blob blob = storage.update(BlobInfo.newBuilder(blobId).setTemporaryHold(true).build());

System.out.println("Temporary hold was set for " + blobName);

Node.js

For more information, see the Cloud Storage Node.js API reference documentation.

The following sample sets an event-based hold on an object:

samples/setEventBasedHold.js

View on GitHub Feedback

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

// The ID of your GCS file
// const fileName = 'your-file-name';

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

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

async function setEventBasedHold() {
  // Set event-based hold
  await storage.bucket(bucketName).file(fileName).setMetadata({
    eventBasedHold: true,
  });
  console.log(`Event-based hold was set for ${fileName}.`);
}

setEventBasedHold().catch(console.error);

The following sample sets a temporary hold on an object:

samples/setTemporaryHold.js

View on GitHub Feedback

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

// The ID of your GCS file
// const fileName = 'your-file-name';

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

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

async function setTemporaryHold() {
  await storage.bucket(bucketName).file(fileName).setMetadata({
    temporaryHold: true,
  });
  console.log(`Temporary hold was set for ${fileName}.`);
}

setTemporaryHold().catch(console.error);

PHP

For more information, see the Cloud Storage PHP API reference documentation.

The following sample sets an event-based hold on an object:

storage/src/set_event_based_hold.php

View on GitHub Feedback

use Google\Cloud\Storage\StorageClient;

/**
 * Sets an event-based hold for an object.
 *
 * @param string $bucketName The name of your Cloud Storage bucket.
 * @param string $objectName The name of your Cloud Storage object.
 */
function set_event_based_hold($bucketName, $objectName)
{
    // $bucketName = 'my-bucket';
    // $objectName = 'my-object';

    $storage = new StorageClient();
    $bucket = $storage->bucket($bucketName);
    $object = $bucket->object($objectName);
    $object->update(['eventBasedHold' => true]);
    printf('Event-based hold was set for %s' . PHP_EOL, $objectName);
}

The following sample sets a temporary hold on an object:

storage/src/set_temporary_hold.php

View on GitHub Feedback

use Google\Cloud\Storage\StorageClient;

/**
 * Sets a temporary hold for an object.
 *
 * @param string $bucketName The name of your Cloud Storage bucket.
 * @param string $objectName The name of your Cloud Storage object.
 */
function set_temporary_hold($bucketName, $objectName)
{
    // $bucketName = 'my-bucket';
    // $objectName = 'my-object';

    $storage = new StorageClient();
    $bucket = $storage->bucket($bucketName);
    $object = $bucket->object($objectName);
    $object->update(['temporaryHold' => true]);
    printf('Temporary hold was set for %s' . PHP_EOL, $objectName);
}

Python

For more information, see the Cloud Storage Python API reference documentation.

The following sample sets an event-based hold on an object:

storage/cloud-client/storage_set_event_based_hold.py

View on GitHub Feedback

from google.cloud import storage


def set_event_based_hold(bucket_name, blob_name):
    """Sets a event based hold on a given blob"""
    # bucket_name = "my-bucket"
    # blob_name = "my-blob"

    storage_client = storage.Client()
    bucket = storage_client.bucket(bucket_name)
    blob = bucket.blob(blob_name)

    blob.event_based_hold = True
    blob.patch()

    print("Event based hold was set for {}".format(blob_name))

The following sample sets a temporary hold on an object:

storage/cloud-client/storage_set_temporary_hold.py

View on GitHub Feedback

from google.cloud import storage


def set_temporary_hold(bucket_name, blob_name):
    """Sets a temporary hold on a given blob"""
    # bucket_name = "my-bucket"
    # blob_name = "my-blob"

    storage_client = storage.Client()
    bucket = storage_client.bucket(bucket_name)
    blob = bucket.blob(blob_name)

    blob.temporary_hold = True
    blob.patch()

    print("Temporary hold was set for #{blob_name}")

Ruby

For more information, see the Cloud Storage Ruby API reference documentation.

The following sample sets an event-based hold on an object:

google-cloud-storage/samples/storage_set_event_based_hold.rb

View on GitHub Feedback

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

  # The ID of your GCS object
  # file_name = "your-file-name"

  require "google/cloud/storage"

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

  file.set_event_based_hold!

  puts "Event-based hold was set for #{file_name}."
end

The following sample sets a temporary hold on an object:

google-cloud-storage/samples/storage_set_temporary_hold.rb

View on GitHub Feedback

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

  # The ID of your GCS object
  # file_name = "your-file-name"

  require "google/cloud/storage"

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

  file.set_temporary_hold!

  puts "Temporary hold was set for #{file_name}."
end

REST APIs

JSON API

1. Get an authorization access token from the OAuth 2.0 Playground. Configure the playground to use your own OAuth credentials.

2. Create a .json file that contains the following information:

   {
     "HOLD_TYPE": true
   }

   Where HOLD_TYPE is the type of hold you want to apply to your object. For example, temporaryHold or eventBasedHold. See Object holds for more information about hold types.

3. Use cURL to call the JSON API with a PATCH Object request:

   curl -X PATCH --data-binary @JSON_FILE_NAME.json \
   -H "Authorization: Bearer OAUTH2_TOKEN" \
   -H "Content-Type: application/json" \
   "https://storage.googleapis.com/storage/v1/b/BUCKET_NAME/o/OBJECT_NAME"

   Where:

   • JSON_FILE_NAME is the name of the file you created in Step 2.
   • OAUTH2_TOKEN is the access token you generated in Step 1.
   • BUCKET_NAME is the name of the relevant bucket. For example, my-bucket.
   • OBJECT_NAME is the name of the relevant object. For example, pets/dog.png.

XML API

The XML API cannot be used to work with object holds. Use one of the other Cloud Storage tools, such as gsutil, instead.

Getting the hold status for an object

Note: You cannot view object holds using the XML API. Use one of the other Cloud Storage tools, such as gsutil, instead.

To view what, if any, holds exist on an object, follow the general instructions for Viewing Object Metadata.

Releasing an object hold

To release a hold on an object in your bucket:

Console

1. In the Google Cloud Console, go to the Cloud Storage Browser page.
   

   Go to Browser

2. In the list of buckets, click on the name of the bucket that has the objects you remove holds from.

3. Select the checkbox next to the names of objects you want to remove holds from.

4. Click the Manage holds button.

   The Manage holds window appears.

5. De-select the checkbox for the holds you want to remove.

6. Click Save hold settings.

To learn how to get detailed error information about failed operations in the Cloud Storage browser, see Troubleshooting.

gsutil

Use the gsutil retention command:

gsutil retention HOLD_TYPE release gs://BUCKET_NAME/OBJECT_NAME

Where:

• HOLD_TYPE is the type of hold you want to release from your object. For example, temp orevent. See Object holds for more information about hold types.
• BUCKET_NAME is the name of the relevant bucket. For example, my-bucket.
• OBJECT_NAME is the name of the relevant object. For example, pets/dog.png.

Code samples

C++

For more information, see the Cloud Storage C++ API reference documentation.

The following sample sets an event-based hold on an object:

google/cloud/storage/examples/storage_object_hold_samples.cc

View on GitHub Feedback

namespace gcs = ::google::cloud::storage;
using ::google::cloud::StatusOr;
[](gcs::Client client, std::string const& bucket_name,
   std::string const& object_name) {
  StatusOr<gcs::ObjectMetadata> original =
      client.GetObjectMetadata(bucket_name, object_name);
  if (!original) throw std::runtime_error(original.status().message());

  StatusOr<gcs::ObjectMetadata> updated = client.PatchObject(
      bucket_name, object_name,
      gcs::ObjectMetadataPatchBuilder().SetEventBasedHold(false),
      gcs::IfMetagenerationMatch(original->metageneration()));
  if (!updated) throw std::runtime_error(updated.status().message());

  std::cout << "The event hold for object " << updated->name()
            << " in bucket " << updated->bucket() << " is "
            << (updated->event_based_hold() ? "enabled" : "disabled") << "\n";
}

The following sample sets a temporary hold on an object:

google/cloud/storage/examples/storage_object_hold_samples.cc

View on GitHub Feedback

namespace gcs = ::google::cloud::storage;
using ::google::cloud::StatusOr;
[](gcs::Client client, std::string const& bucket_name,
   std::string const& object_name) {
  StatusOr<gcs::ObjectMetadata> original =
      client.GetObjectMetadata(bucket_name, object_name);

  if (!original) throw std::runtime_error(original.status().message());
  StatusOr<gcs::ObjectMetadata> updated = client.PatchObject(
      bucket_name, object_name,
      gcs::ObjectMetadataPatchBuilder().SetTemporaryHold(false),
      gcs::IfMetagenerationMatch(original->metageneration()));

  if (!updated) throw std::runtime_error(updated.status().message());
  std::cout << "The temporary hold for object " << updated->name()
            << " in bucket " << updated->bucket() << " is "
            << (updated->temporary_hold() ? "enabled" : "disabled") << "\n";
}

C#

For more information, see the Cloud Storage C# API reference documentation.

The following sample releases an event-based hold on an object:

storage/api/Storage.Samples/ReleaseEventBasedHold.cs

View on GitHub Feedback

using Google.Cloud.Storage.V1;
using System;

public class ReleaseEventBasedHoldSample
{
    public void ReleaseEventBasedHold(
        string bucketName = "your-unique-bucket-name",
        string objectName = "your-object-name")
    {
        var storage = StorageClient.Create();
        var storageObject = storage.GetObject(bucketName, objectName);
        storageObject.EventBasedHold = false;
        storage.UpdateObject(storageObject);
        Console.WriteLine($"Event-based hold was released for {objectName}.");
    }
}

The following sample releases a temporary hold on an object:

storage/api/Storage.Samples/ReleaseTemporaryHold.cs

View on GitHub Feedback

using Google.Cloud.Storage.V1;
using System;

public class ReleaseTemporaryHoldSample
{
    public void ReleaseTemporaryHold(
        string bucketName = "your-unique-bucket-name",
        string objectName = "your-object-name")
    {
        var storage = StorageClient.Create();
        var storageObject = storage.GetObject(bucketName, objectName);
        storageObject.TemporaryHold = false;
        storage.UpdateObject(storageObject);
        Console.WriteLine($"Temporary hold was released for {objectName}.");
    }
}

Go

For more information, see the Cloud Storage Go API reference documentation.

The following sample releases an event-based hold on an object:

storage/objects/release_event_based_hold.go

View on GitHub Feedback

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

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

// releaseEventBasedHold releases an object with event-based hold.
func releaseEventBasedHold(w io.Writer, bucket, object string) error {
	// bucket := "bucket-name"
	// object := "object-name"
	ctx := context.Background()
	client, err := storage.NewClient(ctx)
	if err != nil {
		return fmt.Errorf("storage.NewClient: %v", err)
	}
	defer client.Close()

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

	o := client.Bucket(bucket).Object(object)
	objectAttrsToUpdate := storage.ObjectAttrsToUpdate{
		EventBasedHold: false,
	}
	if _, err := o.Update(ctx, objectAttrsToUpdate); err != nil {
		return fmt.Errorf("Object(%q).Update: %v", object, err)
	}
	fmt.Fprintf(w, "Event based hold was released for %v.\n", object)
	return nil
}

The following sample releases a temporary hold on an object:

storage/objects/release_temporary_hold.go

View on GitHub Feedback

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

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

// releaseTemporaryHold releases an object with temporary hold.
func releaseTemporaryHold(w io.Writer, bucket, object string) error {
	// bucket := "bucket-name"
	// object := "object-name"
	ctx := context.Background()
	client, err := storage.NewClient(ctx)
	if err != nil {
		return fmt.Errorf("storage.NewClient: %v", err)
	}
	defer client.Close()

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

	o := client.Bucket(bucket).Object(object)
	objectAttrsToUpdate := storage.ObjectAttrsToUpdate{
		TemporaryHold: false,
	}
	if _, err := o.Update(ctx, objectAttrsToUpdate); err != nil {
		return fmt.Errorf("Object(%q).Update: %v", object, err)
	}
	fmt.Fprintf(w, "Temporary hold was released for %v.\n", object)
	return nil
}

Java

For more information, see the Cloud Storage Java API reference documentation.

The following sample releases an event-based hold on an object:

google-cloud-examples/src/main/java/com/google/cloud/examples/storage/snippets/StorageSnippets.java

View on GitHub Feedback

// Instantiate a Google Cloud Storage client
Storage storage = StorageOptions.getDefaultInstance().getService();

// The name of a bucket, e.g. "my-bucket"
// String bucketName = "my-bucket";

// The name of a blob, e.g. "my-blob"
// String blobName = "my-blob";

BlobId blobId = BlobId.of(bucketName, blobName);
Blob blob = storage.update(BlobInfo.newBuilder(blobId).setEventBasedHold(false).build());

System.out.println("Event-based hold was released for " + blobName);

The following sample releases a temporary hold on an object:

google-cloud-examples/src/main/java/com/google/cloud/examples/storage/snippets/StorageSnippets.java

View on GitHub Feedback

// Instantiate a Google Cloud Storage client
Storage storage = StorageOptions.getDefaultInstance().getService();

// The name of a bucket, e.g. "my-bucket"
// String bucketName = "my-bucket";

// The name of a blob, e.g. "my-blob"
// String blobName = "my-blob";

BlobId blobId = BlobId.of(bucketName, blobName);
Blob blob = storage.update(BlobInfo.newBuilder(blobId).setTemporaryHold(false).build());

System.out.println("Temporary hold was released for " + blobName);

Node.js

For more information, see the Cloud Storage Node.js API reference documentation.

The following sample releases an event-based hold on an object:

samples/releaseEventBasedHold.js

View on GitHub Feedback

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

// The ID of your GCS file
// const fileName = 'your-file-name';

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

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

async function releaseEventBasedHold() {
  await storage.bucket(bucketName).file(fileName).setMetadata({
    eventBasedHold: false,
  });
  console.log(`Event-based hold was released for ${fileName}.`);
}

releaseEventBasedHold().catch(console.error);

The following sample releases a temporary hold on an object:

samples/releaseTemporaryHold.js

View on GitHub Feedback

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

// The ID of your GCS file
// const fileName = 'your-file-name';

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

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

async function releaseTemporaryHold() {
  await storage.bucket(bucketName).file(fileName).setMetadata({
    temporaryHold: false,
  });
  console.log(`Temporary hold was released for ${fileName}.`);
}

releaseTemporaryHold().catch(console.error);

PHP

For more information, see the Cloud Storage PHP API reference documentation.

The following sample releases an event-based hold on an object:

storage/src/release_event_based_hold.php

View on GitHub Feedback

use Google\Cloud\Storage\StorageClient;

/**
 * Releases an event-based hold for an object.
 *
 * @param string $bucketName The name of your Cloud Storage bucket.
 * @param string $objectName The name of your Cloud Storage object.
 */
function release_event_based_hold($bucketName, $objectName)
{
    // $bucketName = 'my-bucket';
    // $objectName = 'my-object';

    $storage = new StorageClient();
    $bucket = $storage->bucket($bucketName);
    $object = $bucket->object($objectName);
    $object->update(['eventBasedHold' => false]);
    printf('Event-based hold was released for %s' . PHP_EOL, $objectName);
}

The following sample releases a temporary hold on an object:

storage/src/release_temporary_hold.php

View on GitHub Feedback

use Google\Cloud\Storage\StorageClient;

/**
 * Releases a temporary hold for an object.
 *
 * @param string $bucketName The name of your Cloud Storage bucket.
 * @param string $objectName The name of your Cloud Storage object.
 */
function release_temporary_hold($bucketName, $objectName)
{
    // $bucketName = 'my-bucket';
    // $objectName = 'my-object';

    $storage = new StorageClient();
    $bucket = $storage->bucket($bucketName);
    $object = $bucket->object($objectName);
    $object->update(['temporaryHold' => false]);
    printf('Temporary hold was released for %s' . PHP_EOL, $objectName);
}

Python

For more information, see the Cloud Storage Python API reference documentation.

The following sample releases an event-based hold on an object:

storage/cloud-client/storage_release_event_based_hold.py

View on GitHub Feedback

from google.cloud import storage


def release_event_based_hold(bucket_name, blob_name):
    """Releases the event based hold on a given blob"""

    # bucket_name = "my-bucket"
    # blob_name = "my-blob"

    storage_client = storage.Client()
    bucket = storage_client.bucket(bucket_name)
    blob = bucket.blob(blob_name)

    blob.event_based_hold = False
    blob.patch()

    print("Event based hold was released for {}".format(blob_name))

The following sample releases a temporary hold on an object:

storage/cloud-client/storage_release_temporary_hold.py

View on GitHub Feedback

from google.cloud import storage


def release_temporary_hold(bucket_name, blob_name):
    """Releases the temporary hold on a given blob"""

    # bucket_name = "my-bucket"
    # blob_name = "my-blob"

    storage_client = storage.Client()
    bucket = storage_client.bucket(bucket_name)
    blob = bucket.blob(blob_name)

    blob.temporary_hold = False
    blob.patch()

    print("Temporary hold was release for #{blob_name}")

Ruby

For more information, see the Cloud Storage Ruby API reference documentation.

The following sample releases an event-based hold on an object:

google-cloud-storage/samples/storage_release_event_based_hold.rb

View on GitHub Feedback

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

  # The ID of your GCS object
  # file_name = "your-file-name"

  require "google/cloud/storage"

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

  file.release_event_based_hold!

  puts "Event-based hold was released for #{file_name}."
end

The following sample releases a temporary hold on an object:

google-cloud-storage/samples/storage_release_temporary_hold.rb

View on GitHub Feedback

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

  # The ID of your GCS object
  # file_name = "your-file-name"

  require "google/cloud/storage"

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

  file.release_temporary_hold!

  puts "Temporary hold was released for #{file_name}."
end

REST APIs

JSON API

1. Get an authorization access token from the OAuth 2.0 Playground. Configure the playground to use your own OAuth credentials.

2. Create a .json file that contains the following information:

   {
     "HOLD_TYPE": false
   }

   Where HOLD_TYPE is the type of hold you want to release from your object. For example, temporaryHold or eventBasedHold. See Object holds for more information about hold types.

3. Use cURL to call the JSON API with a PATCH Object request:

   curl -X PATCH --data-binary @JSON_FILE_NAME.json \
   -H "Authorization: Bearer OAUTH2_TOKEN" \
   -H "Content-Type: application/json" \
   "https://storage.googleapis.com/storage/v1/b/BUCKET_NAME/o/OBJECT_NAME"

   Where:

   • JSON_FILE_NAME is the name of the file you created in Step 2.
   • OAUTH2_TOKEN is the access token you generated in Step 1.
   • BUCKET_NAME is the name of the relevant bucket. For example, my-bucket.
   • OBJECT_NAME is the name of the relevant object. For example, pets/dog.png.

XML API

The XML API cannot be used to work with object holds. Use one of the other Cloud Storage tools, such as gsutil, instead.

What's next

• Learn more about object holds, including the different types of holds that an object can have.
• Learn how to use retention policies.