Cloud Storage Client Libraries

This page shows how to get started with the 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++

See the GitHub README for details about this client library's requirements and install dependencies.

C#

For more information, see Setting Up a C# Development Environment.

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

For more information, see Setting Up a Go Development Environment.

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

Java

For more information, see Setting Up a Java Development Environment.

Node.js

For more information, see Setting Up a Node.js Development Environment.

npm install --save @google-cloud/storage

PHP

For more information, see Using PHP on Google Cloud.

composer require google/cloud-storage

Python

For more information, see Setting Up a Python Development Environment.

Warning: This library doesn't support App Engine Standard environment for Python 2.7. Review the App Engine Standard Environment Cloud Storage Sample for an example of how to use Cloud Storage in App Engine Standard environment for Python 2.7. Alternatively, use the App Engine Standard environment for Python 3.7, which does support this library.

pip install --upgrade google-cloud-storage

Ruby

For more information, see Setting Up a Ruby Development Environment.

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. Complete the following steps to set up authentication. For other ways to authenticate, see the GCP authentication documentation.

Cloud Console

1. Dans Cloud Console, accédez à la page Créer une clé de compte de service.

   Accéder à la page Créer une clé de compte de service
2. Dans la liste Compte de service, sélectionnez Nouveau compte de service.
3. Dans le champ Nom du compte de service, saisissez un nom.

4. Dans la liste Rôle, sélectionnez Projet > Propriétaire.

   Remarque : Le champ Rôle autorise votre compte de service à accéder aux ressources. Vous pourrez afficher et modifier ce champ ultérieurement à l'aide de Cloud Console. Si vous développez une application de production, spécifiez des autorisations plus précises que Projet > Propriétaire. Pour plus d'informations, consultez la page Attribuer des rôles aux comptes de service.
5. Cliquez sur Créer. Un fichier JSON contenant votre clé est téléchargé sur votre ordinateur.

Ligne de commande

Vous pouvez exécuter les commandes suivantes à l'aide du SDK Cloud sur votre ordinateur local, ou dans Cloud Shell.

1. Créez le compte de service. Remplacez [NAME] par le nom du compte de service.

   gcloud iam service-accounts create [NAME]

2. Accordez des autorisations au compte de service. Remplacez [PROJECT_ID] par l'ID du projet.

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

   Remarque : Le champ Rôle autorise votre compte de service à accéder aux ressources. Vous pourrez afficher et modifier ce champ ultérieurement à l'aide de Cloud Console. Si vous développez une application de production, spécifiez des autorisations plus précises que Projet > Propriétaire. Pour plus d'informations, consultez la page Attribuer des rôles aux comptes de service.

3. Générez le fichier de clé. Remplacez [FILE_NAME] par le nom du fichier de clé.

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

Fournissez des identifiants d'authentification à votre code d'application en définissant la variable d'environnement GOOGLE_APPLICATION_CREDENTIALS. Remplacez [PATH] par le chemin d'accès au fichier JSON contenant votre clé de compte de service et [FILE_NAME] par le nom de fichier. Cette variable ne s'applique qu'à la session de shell actuelle. Par conséquent, si vous ouvrez une nouvelle session, vous devez de nouveau la définir.

Linux ou macOS

export GOOGLE_APPLICATION_CREDENTIALS="[PATH]"

Exemple :

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

Windows

Avec PowerShell :

$env:GOOGLE_APPLICATION_CREDENTIALS="[PATH]"

Exemple :

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

Avec l'invite de commande :

set GOOGLE_APPLICATION_CREDENTIALS=[PATH]

Using the client library

The following example shows how to use the client library.

C++

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#include "google/cloud/storage/client.h"
#include <iostream>
void StorageQuickstart(std::string const& bucket_name) {
  // Create an aliases to make the code easier to read.
  namespace gcs = google::cloud::storage;

  // Create a client to communicate with Google Cloud Storage. This client
  // uses the default configuration for authentication and project id.
  google::cloud::StatusOr<gcs::Client> client =
      gcs::Client::CreateDefaultClient();
  if (!client) throw std::runtime_error(client.status().message());

  // Create a bucket
  google::cloud::StatusOr<gcs::BucketMetadata> metadata = client->CreateBucket(
      bucket_name, gcs::BucketMetadata().set_location("US").set_storage_class(
                       gcs::storage_class::Standard()));
  if (!metadata) throw std::runtime_error(metadata.status().message());

  std::cout << "Created bucket " << metadata->name() << "\n";
}

C#

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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.
            using (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

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

import (
	"context"
	"fmt"
	"log"
	"time"

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

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

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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

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

// Creates a client
const storage = new Storage();
// Creates a client from a Google service account key.
// const storage = new Storage({keyFilename: "key.json"});

/**
 * TODO(developer): Uncomment these variables before running the sample.
 */
// const bucketName = 'bucket-name';

async function createBucket() {
  // Creates the new bucket
  await storage.createBucket(bucketName);
  console.log(`Bucket ${bucketName} created.`);
}

createBucket().catch(console.error);

PHP

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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

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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

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

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

# bucket_name = "The name of the bucket to be created, i.e. 'new-bucket'"

# Creates the new bucket
bucket = storage.create_bucket bucket_name

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

Note: These samples create a bucket in the default us multi-region with a default storage class of Standard Storage.

More Examples

For more examples of using client libraries with Cloud Storage, see the following how-to guides:

• Creating Storage Buckets
• Uploading Objects
• Downloading Objects
• List of additional guides

Additional resources

C++

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

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