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

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

Java

For more information, see Setting Up a Java Development Environment. Se você está usando o Maven, adicione ao seu arquivo pom.xml:
<dependency>
  <groupId>com.google.cloud</groupId>
  <artifactId>google-cloud-storage</artifactId>
  <version>1.49.0</version>
</dependency>
Se você está usando o Gradle, adicione às suas dependências:
compile 'com.google.cloud:google-cloud-storage:1.49.0'
Se você está usando o SBT, adicione às suas dependências:
libraryDependencies += "com.google.cloud" % "google-cloud-storage" % "1.49.0"

Node.js

For more information, see Setting Up a Node.js Development Environment.
npm install --save @google-cloud/storage

PHP

composer require google/cloud-storage

Python

For more information, see Setting Up a Python Development Environment.
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 more information, see the GCP authentication documentation .

Console do GCP

  1. Acesse a página Criar chave da conta de serviço no Console do GCP.

    Acessar a página "Criar chave da conta de serviço"
  2. Na lista suspensa Conta de serviço, selecione Nova conta de serviço.
  3. Insira um nome no campo Nome da conta de serviço.
  4. Na lista suspensa Papel, selecione Projeto > Proprietário.

    Observação: o campo Papel autoriza sua conta de serviço a acessar recursos. É possível visualizar e alterar esse campo mais tarde no Console do GCP. Para desenvolver um aplicativo de produção, especifique permissões mais granulares do que Projeto> Proprietário. Para mais informações, consulte Como atribuir papéis a contas de serviço.
  5. Clique em Criar. O download de um arquivo JSON que contém sua chave é feito no seu computador.

Linha de comando

Você pode executar os seguintes comandos usando o Cloud SDK na sua máquina local ou no Cloud Shell.

  1. Crie a conta de serviço. Substitua [NAME] pelo nome que você quer atribuir à sua conta de serviço.

    gcloud iam service-accounts create [NAME]
  2. Conceda permissões à conta de serviço. Substitua [PROJECT-ID] pelo código do projeto.

    gcloud projects add-iam-policy-binding [PROJECT_ID] --member "serviceAccount:[NAME]@[PROJECT_ID].iam.gserviceaccount.com" --role "roles/owner"
    Observação: o campo Papel autoriza sua conta de serviço a acessar recursos. É possível visualizar e alterar esse campo mais tarde no Console do GCP. Para desenvolver um aplicativo de produção, especifique permissões mais granulares do que Projeto > Proprietário. Para mais informações, consulte Como atribuir papéis a contas de serviço.
  3. Gere o arquivo de chave. Substitua [FILE_NAME] pelo nome do arquivo de chave.

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

Para fornecer credenciais de autenticação ao código do seu aplicativo, configure a variável de ambiente GOOGLE_APPLICATION_CREDENTIALS. Substitua [PATH] pelo caminho do arquivo JSON que contém a chave da sua conta de serviço e [FILE_NAME] pelo nome do arquivo.

Linux ou Mac OS X

export GOOGLE_APPLICATION_CREDENTIALS="[PATH]"

Por exemplo:

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

Windows

Com o PowerShell:

$env:GOOGLE_APPLICATION_CREDENTIALS="[PATH]"

Por exemplo:

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

Com o prompt de comando:

set GOOGLE_APPLICATION_CREDENTIALS=[PATH]

Using the client library

The following example shows how to use the client library.

C++

#include "google/cloud/storage/client.h"
#include <iostream>

int main(int argc, char* argv[]) {
  if (argc != 3) {
    std::cerr << "Missing project id and/or bucket name.\n";
    std::cerr << "Usage: storage_quickstart <bucket-name> <project-id>\n";
    return 1;
  }
  std::string bucket_name = argv[1];
  std::string project_id = argv[2];

  // Create 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) {
    std::cerr << "Failed to create Storage Client, status=" << client.status()
              << "\n";
    return 1;
  }

  google::cloud::StatusOr<gcs::BucketMetadata> bucket_metadata =
      client->CreateBucketForProject(
          bucket_name, project_id,
          gcs::BucketMetadata()
              .set_location("us-east1")
              .set_storage_class(gcs::storage_class::Regional()));

  if (!bucket_metadata) {
    std::cerr << "Error creating bucket " << bucket_name
              << ", status=" << bucket_metadata.status() << "\n";
    return 1;
  }

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

  return 0;
}

C#

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

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

import (
	"context"
	"fmt"
	"log"

	"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.
	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

// 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

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

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

/**
 * 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();

PHP

# 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

# 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

# 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_id: 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."

More Examples

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

Additional Resources

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