Listing objects

This page shows you how to list the objects stored in your Cloud Storage buckets, which are ordered in the list lexicographically by name. For an overview of buckets and objects, read the Key Terms.

To list the objects in a bucket:

Console

1. Open the Cloud Storage browser in the Google Cloud Console.
   Open the Cloud Storage browser

2. In the bucket list, select the bucket whose contents you want to view.

3. Optionally, use the Filter by name prefix field to narrow the results in your bucket list to only objects with the prefix you specify.

gsutil

Use the gsutil ls command with the -r flag:

gsutil ls -r gs://[BUCKET_NAME]/**

Where:

• [BUCKET_NAME] is the name of the bucket whose objects you want to list. For example, my-bucket.

The response looks like the following example:

gs://[BUCKET_NAME]/[OBJECT_NAME1]
gs://[BUCKET_NAME]/[OBJECT_NAME2]
gs://[BUCKET_NAME]/[OBJECT_NAME3]
...

Note: You can use a prefix in your listing request to limit the results to objects that have the specified prefix:

gsutil ls -r gs://[BUCKET_NAME]/[PREFIX]**

For example, gsutil ls -r gs://my-bucket/p** returns:

  gs://my-bucket/puppy.png
  gs://my-bucket/pug.jpg
  gs://my-bucket/pets/dog.png
  ...

Code samples

C++

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

The following sample lists all objects in a bucket:

View on GitHub Feedback

namespace gcs = google::cloud::storage;
[](gcs::Client client, std::string bucket_name) {
  for (auto&& object_metadata : client.ListObjects(bucket_name)) {
    if (!object_metadata) {
      throw std::runtime_error(object_metadata.status().message());
    }

    std::cout << "bucket_name=" << object_metadata->bucket()
              << ", object_name=" << object_metadata->name() << "\n";
  }
}

The following sample lists objects with a given prefix:

View on GitHub Feedback

namespace gcs = google::cloud::storage;
[](gcs::Client client, std::string bucket_name, std::string bucket_prefix) {
  for (auto&& object_metadata :
       client.ListObjects(bucket_name, gcs::Prefix(bucket_prefix))) {
    if (!object_metadata) {
      throw std::runtime_error(object_metadata.status().message());
    }

    std::cout << "bucket_name=" << object_metadata->bucket()
              << ", object_name=" << object_metadata->name() << "\n";
  }
}

C#

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

The following sample lists all objects in a bucket:

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private void ListObjects(string bucketName)
{
    var storage = StorageClient.Create();
    foreach (var storageObject in storage.ListObjects(bucketName, ""))
    {
        Console.WriteLine(storageObject.Name);
    }
}

The following sample lists objects with a given prefix:

View on GitHub Feedback

private void ListObjects(string bucketName, string prefix,
    string delimiter)
{
    var storage = StorageClient.Create();
    var options = new ListObjectsOptions() { Delimiter = delimiter };
    foreach (var storageObject in storage.ListObjects(
        bucketName, prefix, options))
    {
        Console.WriteLine(storageObject.Name);
    }
}

Go

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

The following sample lists all objects in a bucket:

View on GitHub Feedback

it := client.Bucket(bucket).Objects(ctx, nil)
for {
	attrs, err := it.Next()
	if err == iterator.Done {
		break
	}
	if err != nil {
		return err
	}
	fmt.Fprintln(w, attrs.Name)
}

The following sample lists objects with a given prefix:

View on GitHub Feedback

// Prefixes and delimiters can be used to emulate directory listings.
// Prefixes can be used filter objects starting with prefix.
// The delimiter argument can be used to restrict the results to only the
// objects in the given "directory". Without the delimiter, the entire  tree
// under the prefix is returned.
//
// For example, given these blobs:
//   /a/1.txt
//   /a/b/2.txt
//
// If you just specify prefix="a/", you'll get back:
//   /a/1.txt
//   /a/b/2.txt
//
// However, if you specify prefix="a/" and delim="/", you'll get back:
//   /a/1.txt
it := client.Bucket(bucket).Objects(ctx, &storage.Query{
	Prefix:    prefix,
	Delimiter: delim,
})
for {
	attrs, err := it.Next()
	if err == iterator.Done {
		break
	}
	if err != nil {
		return err
	}
	fmt.Fprintln(w, attrs.Name)
}

Java

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

The following sample lists all objects in a bucket:

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Page<Blob> blobs = bucket.list();
for (Blob blob : blobs.iterateAll()) {
  // do something with the blob
}

The following sample lists objects with a given prefix:

View on GitHub Feedback

Page<Blob> blobs =
    storage.list(
        bucketName, BlobListOption.currentDirectory(), BlobListOption.prefix(directory));
for (Blob blob : blobs.iterateAll()) {
  // do something with the blob
}

Node.js

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

The following sample lists all objects in a bucket:

View on GitHub Feedback

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

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

/**
 * TODO(developer): Uncomment the following line before running the sample.
 */
// const bucketName = 'Name of a bucket, e.g. my-bucket';

// Lists files in the bucket
const [files] = await storage.bucket(bucketName).getFiles();

console.log('Files:');
files.forEach(file => {
  console.log(file.name);
});

The following sample lists objects with a given prefix:

View on GitHub Feedback

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

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

/**
 * TODO(developer): Uncomment the following lines before running the sample.
 */
// const bucketName = 'Name of a bucket, e.g. my-bucket';
// const prefix = 'Prefix by which to filter, e.g. public/';
// const delimiter = 'Delimiter to use, e.g. /';

/**
 * This can be used to list all blobs in a "folder", e.g. "public/".
 *
 * The delimiter argument can be used to restrict the results to only the
 * "files" in the given "folder". Without the delimiter, the entire tree under
 * the prefix is returned. For example, given these blobs:
 *
 *   /a/1.txt
 *   /a/b/2.txt
 *
 * If you just specify prefix = '/a', you'll get back:
 *
 *   /a/1.txt
 *   /a/b/2.txt
 *
 * However, if you specify prefix='/a' and delimiter='/', you'll get back:
 *
 *   /a/1.txt
 */
const options = {
  prefix: prefix,
};

if (delimiter) {
  options.delimiter = delimiter;
}

// Lists files in the bucket, filtered by a prefix
const [files] = await storage.bucket(bucketName).getFiles(options);

console.log('Files:');
files.forEach(file => {
  console.log(file.name);
});

PHP

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

The following sample lists all objects in a bucket:

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use Google\Cloud\Storage\StorageClient;

/**
 * List Cloud Storage bucket objects.
 *
 * @param string $bucketName the name of your Cloud Storage bucket.
 *
 * @return void
 */
function list_objects($bucketName)
{
    $storage = new StorageClient();
    $bucket = $storage->bucket($bucketName);
    foreach ($bucket->objects() as $object) {
        printf('Object: %s' . PHP_EOL, $object->name());
    }
}

The following sample lists objects with a given prefix:

View on GitHub Feedback

use Google\Cloud\Storage\StorageClient;

/**
 * List Cloud Storage bucket objects with specified prefix.
 *
 * @param string $bucketName the name of your Cloud Storage bucket.
 *
 * @return void
 */
function list_objects_with_prefix($bucketName, $prefix)
{
    $storage = new StorageClient();
    $bucket = $storage->bucket($bucketName);
    $options = ['prefix' => $prefix];
    foreach ($bucket->objects($options) as $object) {
        printf('Object: %s' . PHP_EOL, $object->name());
    }
}

Python

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

The following sample lists all objects in a bucket:

View on GitHub Feedback

from google.cloud import storage


def list_blobs(bucket_name):
    """Lists all the blobs in the bucket."""
    # bucket_name = "your-bucket-name"

    storage_client = storage.Client()

    # Note: Client.list_blobs requires at least package version 1.17.0.
    blobs = storage_client.list_blobs(bucket_name)

    for blob in blobs:
        print(blob.name)

The following sample lists objects with a given prefix:

View on GitHub Feedback

from google.cloud import storage


def list_blobs_with_prefix(bucket_name, prefix, delimiter=None):
    """Lists all the blobs in the bucket that begin with the prefix.

    This can be used to list all blobs in a "folder", e.g. "public/".

    The delimiter argument can be used to restrict the results to only the
    "files" in the given "folder". Without the delimiter, the entire tree under
    the prefix is returned. For example, given these blobs:

        a/1.txt
        a/b/2.txt

    If you just specify prefix = 'a', you'll get back:

        a/1.txt
        a/b/2.txt

    However, if you specify prefix='a' and delimiter='/', you'll get back:

        a/1.txt

    Additionally, the same request will return blobs.prefixes populated with:

        a/b/
    """

    storage_client = storage.Client()

    # Note: Client.list_blobs requires at least package version 1.17.0.
    blobs = storage_client.list_blobs(
        bucket_name, prefix=prefix, delimiter=delimiter
    )

    print("Blobs:")
    for blob in blobs:
        print(blob.name)

    if delimiter:
        print("Prefixes:")
        for prefix in blobs.prefixes:
            print(prefix)

Ruby

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

The following sample lists all objects in a bucket:

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# project_id  = "Your Google Cloud project ID"
# bucket_name = "Your Google Cloud Storage bucket name"

require "google/cloud/storage"

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

bucket.files.each do |file|
  puts file.name
end

The following sample lists objects with a given prefix:

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# project_id  = "Your Google Cloud project ID"
# bucket_name = "Your Google Cloud Storage bucket name"
# prefix      = "Filter results to files whose names begin with this prefix"

require "google/cloud/storage"

storage = Google::Cloud::Storage.new project_id: project_id
bucket  = storage.bucket bucket_name
files   = bucket.files prefix: prefix

files.each do |file|
  puts 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. Use cURL to call the JSON API with a GET Bucket request:

   curl -X GET -H "Authorization: Bearer [OAUTH2_TOKEN]" \
     "https://storage.googleapis.com/storage/v1/b/[BUCKET_NAME]/o"

   Where:

   • [ACCESS_TOKEN] is the access token you generated in Step 1.
   • [BUCKET_NAME] is the name of the bucket whose objects you want to list. For example, my-bucket.

   You can use a prefix=[PREFIX] query string parameter to limit results to objects that have the specified prefix.

XML 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 XML API with a GET Bucket request:

   curl -X GET -H "Authorization: Bearer [OAUTH2_TOKEN]" \
     "https://storage.googleapis.com/[BUCKET_NAME]"

   Where:

   • [ACCESS_TOKEN] is the access token you generated in Step 1.
   • [BUCKET_NAME] is the name of the bucket whose objects you want to list. For example, my-bucket.

   You can use a prefix=[PREFIX] query string parameter to limit results to buckets that have the specified prefix.

What's next

• Download an object from your bucket.
• View and edit object metadata.
• Delete objects from your bucket.