Remove a default ACL from a bucket

Remove a default access control list (ACL) for a Cloud Storage bucket.

Explore further

For detailed documentation that includes this code sample, see the following:

Code sample

C#

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


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

public class RemoveBucketDefaultOwnerSample
{
    public void RemoveBucketDefaultOwner(
        string bucketName = "your-unique-bucket-name",
        string userEmail = "user@iam.gserviceaccount.com")
    {
        var storage = StorageClient.Create();
        var bucket = storage.GetBucket(bucketName, new GetBucketOptions { Projection = Projection.Full });
        if (bucket.DefaultObjectAcl == null)
        {
            Console.WriteLine("No default owner to remove");
        }
        else
        {
            bucket.DefaultObjectAcl = bucket.DefaultObjectAcl.Where(acl => !(acl.Entity == $"user-{userEmail}" && acl.Role == "OWNER")).ToList();
            var updatedBucket = storage.UpdateBucket(bucket);
            Console.WriteLine($"Removed user {userEmail} from bucket {bucketName}.");
        }
    }
}

C++

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

namespace gcs = ::google::cloud::storage;
[](gcs::Client client, std::string const& bucket_name,
   std::string const& entity) {
  google::cloud::Status status =
      client.DeleteDefaultObjectAcl(bucket_name, entity);

  if (!status.ok()) throw std::runtime_error(status.message());
  std::cout << "Deleted ACL entry for " << entity << " in bucket "
            << bucket_name << "\n";
}

Go

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

import (
	"context"
	"fmt"

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

// deleteDefaultBucketACL removes default ACL from a bucket.
func removeBucketDefaultOwner(bucket string, entity storage.ACLEntity) error {
	// bucket := "bucket-name"
	// entity := storage.AllUsers
	ctx := context.Background()
	client, err := storage.NewClient(ctx)
	if err != nil {
		return fmt.Errorf("storage.NewClient: %v", err)
	}
	defer client.Close()

	acl := client.Bucket(bucket).DefaultObjectACL()
	if err := acl.Delete(ctx, entity); err != nil {
		return fmt.Errorf("ACLHandle.Delete: %v", err)
	}
	return nil
}

Java

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


import com.google.cloud.storage.Acl.User;
import com.google.cloud.storage.Bucket;
import com.google.cloud.storage.Storage;
import com.google.cloud.storage.StorageOptions;

public class RemoveBucketDefaultOwner {

  public static void removeBucketDefaultOwner(String bucketName, String userEmail) {

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

    // The email of the user you wish to remove as a default owner
    // String userEmail = "someuser@domain.com"

    Storage storage = StorageOptions.newBuilder().build().getService();
    Bucket bucket = storage.get(bucketName);
    User userToRemove = new User(userEmail);

    boolean success = bucket.deleteDefaultAcl(userToRemove);
    if (success) {
      System.out.println("Removed user " + userEmail + " as an owner on " + bucketName);
    } else {
      System.out.println("User " + userEmail + " was not found");
    }
  }
}

Node.js

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

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

// The email address of the user to remove
// const userEmail = 'user-email-to-remove';

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

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

async function removeBucketDefaultOwner() {
  // Removes the user from the access control list of the bucket. You can use
  // deleteAllUsers(), deleteDomain(), deleteProject(), deleteGroup(), and
  // deleteAllAuthenticatedUsers() to remove access for different types of entities.
  await storage.bucket(bucketName).acl.default.owners.deleteUser(userEmail);

  console.log(`Removed user ${userEmail} from bucket ${bucketName}.`);
}

removeBucketDefaultOwner().catch(console.error);

PHP

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

use Google\Cloud\Storage\StorageClient;

/**
 * Delete an entity from a bucket's default ACL.
 *
 * @param string $bucketName The name of your Cloud Storage bucket.
 * @param string $entity The entity for which to update access controls.
 */
function delete_bucket_default_acl($bucketName, $entity)
{
    // $bucketName = 'my-bucket';
    // $entity = 'user-example@domain.com';

    $storage = new StorageClient();
    $bucket = $storage->bucket($bucketName);
    $acl = $bucket->defaultAcl();
    $acl->delete($entity);
    printf('Deleted %s from gs://%s default ACL' . PHP_EOL, $entity, $bucketName);
}

Python

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

from google.cloud import storage


def remove_bucket_default_owner(bucket_name, user_email):
    """Removes a user from the access control list of the given bucket's
    default object access control list."""
    # bucket_name = "your-bucket-name"
    # user_email = "name@example.com"

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

    # Reload fetches the current ACL from Cloud Storage.
    bucket.acl.reload()

    # You can also use `group`, `domain`, `all_authenticated` and `all` to
    # remove access for different types of entities.
    bucket.default_object_acl.user(user_email).revoke_read()
    bucket.default_object_acl.user(user_email).revoke_write()
    bucket.default_object_acl.user(user_email).revoke_owner()
    bucket.default_object_acl.save()

    print(
        f"Removed user {user_email} from the default acl of bucket {bucket_name}."
    )

Ruby

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

# The ID of your GCS bucket
# bucket_name = "your-unique-bucket-name"
# email       = "Google Cloud Storage ACL Entity email"

require "google/cloud/storage"

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

bucket.default_acl.delete email

puts "Removed default ACL permissions for #{email} from #{bucket_name}"

What's next

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