Cloud Storage Client Libraries

This page shows how to get started with the new Cloud Client Libraries for the Google Cloud Storage API. Read more about the client libraries for Cloud APIs, including the older Google APIs Client Libraries, in Client Libraries Explained.

Installing the client library

C#

If you are using Visual Studio 2017 or higher, open nuget package manager window and type the following:

Install-Package Google.Cloud.Storage.V1

If you are using .NET Core command-line interface tools to install your dependencies, run the following command:

dotnet add package Google.Cloud.Storage.V1

Go

go get -u cloud.google.com/go/storage

Java

If you are using Maven, add this to your pom.xml file:

<dependency>
  <groupId>com.google.cloud</groupId>
  <artifactId>google-cloud-storage</artifactId>
  <version>1.31.0</version>
</dependency>

If you are using Gradle, add this to your dependencies:

compile 'com.google.cloud:google-cloud-storage:1.31.0'

If you are using SBT, add this to your dependencies:

libraryDependencies += "com.google.cloud" % "google-cloud-storage" % "1.31.0"

Note: Cloud Java client libraries do not currently support Android.

Warning: The client library supports App Engine Standard environment for Java 8. Use the App Engine Storage library for Java 7.

Node.js

npm install --save @google-cloud/storage

PHP

composer require google/cloud-storage

Python

For more on setting up your Python development environment, refer to Python Development Environment Setup Guide.

pip install --upgrade google-cloud-storage

Ruby

gem install google-cloud-storage

Setting up authentication

To run the client library, you must first set up authentication by creating a service account and setting an environment variable.

GCP Console

1. Go to the Create service account key page in the GCP Console.

   Go to the Create Service Account Key page
2. From the Service account drop-down list, select New service account.
3. Enter a name into the Service account name field.

4. From the Role drop-down list, select Project > Owner.

   Note: The Role field authorizes your service account to access resources. You can view and change this field later using GCP Console. If you are developing a production application, specify more granular permissions than Project > Owner. For more information, see granting roles to service accounts.
5. Click Create. A JSON file that contains your key downloads to your computer.

Command line

You can run the following commands using the Cloud SDK on your local machine, or within Cloud Shell.

1. Create the service account. Replace [NAME] with your desired service account name.

   gcloud iam service-accounts create [NAME]

2. Grant permissions to the service account. Replace [PROJECT_ID] with your project ID.

   gcloud projects add-iam-policy-binding [PROJECT_ID] --member "serviceAccount:[NAME]@[PROJECT_ID].iam.gserviceaccount.com" --role "roles/owner"

   Note: The Role field authorizes your service account to access resources. You can view and change this field later using GCP Console. If you are developing a production application, specify more granular permissions than Project > Owner. For more information, see granting roles to service accounts.

3. Generate the key file. Replace [FILE_NAME] with a name for the key file.

   gcloud iam service-accounts keys create [FILE_NAME].json --iam-account [NAME]@[PROJECT_ID].iam.gserviceaccount.com

Provide authentication credentials to your application code by setting the environment variable GOOGLE_APPLICATION_CREDENTIALS. Replace [PATH] with the file path of the JSON file that contains your service account key, and [FILE_NAME] with the filename.

Linux or macOS

export GOOGLE_APPLICATION_CREDENTIALS="[PATH]"

For example:

export GOOGLE_APPLICATION_CREDENTIALS="/home/user/Downloads/[FILE_NAME].json"

Windows

With PowerShell:

$env:GOOGLE_APPLICATION_CREDENTIALS="[PATH]"

For example:

$env:GOOGLE_APPLICATION_CREDENTIALS="C:\Users\username\Downloads\[FILE_NAME].json"

With command prompt:

set GOOGLE_APPLICATION_CREDENTIALS=[PATH]

Using the client library

The following example shows how to use the client library.

C#

Read more in the C# API Reference Documentation for the Google Cloud Storage API Client Library.

View on GitHub Feedback

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

namespace GoogleCloudSamples
{
    class StorageQuickstart
    {
        static void Main(string[] args)
        {
            // Your Google Cloud Platform project ID.
            string projectId = "YOUR-PROJECT-ID";


            // Instantiates a client.
            StorageClient storageClient = StorageClient.Create();

            // The name for the new bucket.
            string bucketName = projectId + "-test-bucket";
            try
            {
                // Creates the new bucket.
                storageClient.CreateBucket(projectId, bucketName);
                Console.WriteLine($"Bucket {bucketName} created.");
            }
            catch (Google.GoogleApiException e)
            when (e.Error.Code == 409)
            {
                // The bucket already exists.  That's fine.
                Console.WriteLine(e.Error.Message);
            }
        }
    }
}

Go

Read more in the Go API Reference Documentation for the Google Cloud Storage API Client Library.

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// Sample storage-quickstart creates a Google Cloud Storage bucket.
package main

import (
	"fmt"
	"log"

	// Imports the Google Cloud Storage client package.
	"cloud.google.com/go/storage"
	"golang.org/x/net/context"
)

func main() {
	ctx := context.Background()

	// Sets your Google Cloud Platform project ID.
	projectID := "YOUR_PROJECT_ID"

	// Creates a client.
	client, err := storage.NewClient(ctx)
	if err != nil {
		log.Fatalf("Failed to create client: %v", err)
	}

	// Sets the name for the new bucket.
	bucketName := "my-new-bucket"

	// Creates a Bucket instance.
	bucket := client.Bucket(bucketName)

	// Creates the new bucket.
	if err := bucket.Create(ctx, projectID, nil); err != nil {
		log.Fatalf("Failed to create bucket: %v", err)
	}

	fmt.Printf("Bucket %v created.\n", bucketName)
}

Java

Read more in the Java API Reference Documentation for the Google Cloud Storage API Client Library.

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// Imports the Google Cloud client library
import com.google.cloud.storage.Bucket;
import com.google.cloud.storage.BucketInfo;
import com.google.cloud.storage.Storage;
import com.google.cloud.storage.StorageOptions;

public class QuickstartSample {
  public static void main(String... args) throws Exception {
    // Instantiates a client
    Storage storage = StorageOptions.getDefaultInstance().getService();

    // The name for the new bucket
    String bucketName = args[0];  // "my-new-bucket";

    // Creates the new bucket
    Bucket bucket = storage.create(BucketInfo.of(bucketName));

    System.out.printf("Bucket %s created.%n", bucket.getName());
  }
}

Node.js

Read more in the Node.js API Reference Documentation for the Google Cloud Storage API Client Library.

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

// Your Google Cloud Platform project ID
const projectId = 'YOUR_PROJECT_ID';

// Creates a client
const storage = new Storage({
  projectId: projectId,
});

// The name for the new bucket
const bucketName = 'my-new-bucket';

// Creates the new bucket
storage
  .createBucket(bucketName)
  .then(() => {
    console.log(`Bucket ${bucketName} created.`);
  })
  .catch(err => {
    console.error('ERROR:', err);
  });

PHP

Read more in the PHP API Reference Documentation for the Google Cloud Storage API Client Library.

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# Includes the autoloader for libraries installed with composer
require __DIR__ . '/vendor/autoload.php';

# Imports the Google Cloud client library
use Google\Cloud\Storage\StorageClient;

# Your Google Cloud Platform project ID
$projectId = 'YOUR_PROJECT_ID';

# Instantiates a client
$storage = new StorageClient([
    'projectId' => $projectId
]);

# The name for the new bucket
$bucketName = 'my-new-bucket';

# Creates the new bucket
$bucket = $storage->createBucket($bucketName);

echo 'Bucket ' . $bucket->name() . ' created.';

Python

Read more in the Python API Reference Documentation for the Google Cloud Storage API Client Library.

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# Imports the Google Cloud client library
from google.cloud import storage

# Instantiates a client
storage_client = storage.Client()

# The name for the new bucket
bucket_name = 'my-new-bucket'

# Creates the new bucket
bucket = storage_client.create_bucket(bucket_name)

print('Bucket {} created.'.format(bucket.name))

Ruby

Read more in the Ruby API Reference Documentation for the Google Cloud Storage API Client Library.

View on GitHub Feedback

# Imports the Google Cloud client library
require "google/cloud/storage"

# Your Google Cloud Platform project ID
project_id = "YOUR_PROJECT_ID"

# Instantiates a client
storage = Google::Cloud::Storage.new project: project_id

# The name for the new bucket
bucket_name = "my-new-bucket"

# Creates the new bucket
bucket = storage.create_bucket bucket_name

puts "Bucket #{bucket.name} was created."

Additional Resources

C#

• API Reference Documentation
• Source Code
• GitHub Issue Tracker
• Stack Overflow

Go

• API Reference Documentation
• Source Code
• GitHub Issue Tracker
• Stack Overflow

Java

• API Reference Documentation
• Source Code
• GitHub Issue Tracker
• Stack Overflow

Node.js

• API Reference Documentation
• Source Code
• GitHub Issue Tracker
• Stack Overflow

PHP

• API Reference Documentation
• Source Code
• GitHub Issue Tracker
• Stack Overflow

Python

• API Reference Documentation
• Source Code
• GitHub Issue Tracker
• Stack Overflow

Ruby

• API Reference Documentation
• Source Code
• GitHub Issue Tracker
• Stack Overflow