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.

Se você estiver usando o Maven, adicione isto ao arquivo pom.xml:

<dependencyManagement>
  <dependencies>
    <dependency>
      <groupId>com.google.cloud</groupId>
      <artifactId>libraries-bom</artifactId>
      <version>5.3.0</version>
      <type>pom</type>
      <scope>import</scope>
    </dependency>
  </dependencies>
</dependencyManagement>

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

Se estiver usando o Gradle, adicione o seguinte às suas dependências:

compile 'com.google.cloud:google-cloud-storage:1.108.0'

Se você estiver usando o sbt, adicione isto às dependências:

libraryDependencies += "com.google.cloud" % "google-cloud-storage" % "1.108.0"

Caso você esteja usando o IntelliJ ou o Eclipse, poderá adicionar bibliotecas de cliente ao seu projeto usando estes plug-ins de ambiente de desenvolvimento integrado:

• Cloud Code for IntelliJ
• Ferramentas para Eclipse

Os plug-ins também oferecem outras funcionalidades, como gerenciamento de chaves de contas de serviço. Consulte a documentação de cada plug-in para mais detalhes.

Observação: as bibliotecas de cliente Java para Google Cloud atualmente não são compatíveis com Android.

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. No Console do Cloud, acesse a página Criar chave da conta de serviço.

   Acessar página "Criar chave da conta de serviço"
2. Na lista Conta de serviço, selecione Nova conta de serviço.
3. No campo Nome da conta de serviço, insira um nome.

4. Na lista 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 usando o Console do Cloud. Se você estiver desenvolvendo 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 a chave é feito no computador.

Linha de comando

É possível executar os seguintes comandos usando o SDK do Cloud na máquina local ou no Cloud Shell.

1. Crie a conta de serviço. Substitua [NAME] por um nome para a conta de serviço.

   gcloud iam service-accounts create [NAME]

2. Conceda permissões à conta de serviço. Substitua [PROJECT-ID] pelo ID 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 a conta de serviço a acessar recursos. Se quiser visualizar e alterar esse campo mais tarde, use o Console do Cloud. Se você estiver desenvolvendo 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

Forneça as credenciais de autenticação ao código do aplicativo ao definir a variável de ambiente GOOGLE_APPLICATION_CREDENTIALS. Substitua [PATH] pelo caminho do arquivo JSON com a chave da conta de serviço e [FILE_NAME] pelo nome de arquivo. Essa variável só se aplica à sessão de shell atual. Dessa maneira, se você abrir uma nova sessão, precisará definir a variável novamente.

Linux ou macOS

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]"

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++

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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