Déplacer un objet

Le déplacement d'un objet dans Cloud Storage comprend deux opérations. Pour commencer, vous copiez l'objet dans un bucket de destination et vous renommez l'objet déplacé. Ensuite, vous supprimez l'objet d'origine. Vous ne devez supprimer un objet que lorsque l'emplacement d'origine diffère de la nouvelle destination.

En savoir plus

Pour obtenir une documentation détaillée incluant cet exemple de code, consultez les articles suivants :

Copier, renommer et déplacer des objets

Exemple de code

C++

Pour en savoir plus, consultez la documentation de référence de l'API Cloud Storage en langage C++.

Pour vous authentifier auprès de Cloud Storage, configurez le service Identifiants par défaut de l'application. Pour en savoir plus, consultez Configurer l'authentification pour un environnement de développement local.

namespace gcs = ::google::cloud::storage;
using ::google::cloud::StatusOr;
[](gcs::Client client, std::string const& bucket_name,
   std::string const& old_object_name, std::string const& new_object_name) {
  StatusOr<gcs::ObjectMetadata> metadata = client.RewriteObjectBlocking(
      bucket_name, old_object_name, bucket_name, new_object_name);
  if (!metadata) throw std::move(metadata).status();

  google::cloud::Status status =
      client.DeleteObject(bucket_name, old_object_name);
  if (!status.ok()) throw std::runtime_error(status.message());

  std::cout << "Renamed " << old_object_name << " to " << new_object_name
            << " in bucket " << bucket_name << "\n";
}

C#

Pour en savoir plus, consultez la documentation de référence de l'API Cloud Storage en langage C#.


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

public class MoveFileSample
{
    public void MoveFile(
        string sourceBucketName = "your-unique-bucket-name",
        string sourceObjectName = "your-object-name",
        string targetBucketName = "target-object-bucket",
        string targetObjectName = "target-object-name")
    {
        var storage = StorageClient.Create();
        storage.CopyObject(sourceBucketName, sourceObjectName, targetBucketName, targetObjectName);
        storage.DeleteObject(sourceBucketName, sourceObjectName);
        Console.WriteLine($"Moved {sourceObjectName} to {targetObjectName}.");
    }
}

Go

Pour en savoir plus, consultez la documentation de référence de l'API Cloud Storage en langage Go.

import (
	"context"
	"fmt"
	"io"
	"time"

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

// moveFile moves an object into another location.
func moveFile(w io.Writer, bucket, object string) error {
	// bucket := "bucket-name"
	// object := "object-name"
	ctx := context.Background()
	client, err := storage.NewClient(ctx)
	if err != nil {
		return fmt.Errorf("storage.NewClient: %w", err)
	}
	defer client.Close()

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

	dstName := object + "-rename"
	src := client.Bucket(bucket).Object(object)
	dst := client.Bucket(bucket).Object(dstName)

	// Optional: set a generation-match precondition to avoid potential race
	// conditions and data corruptions. The request to copy the file is aborted
	// if the object's generation number does not match your precondition.
	// For a dst object that does not yet exist, set the DoesNotExist precondition.
	dst = dst.If(storage.Conditions{DoesNotExist: true})
	// If the destination object already exists in your bucket, set instead a
	// generation-match precondition using its generation number.
	// attrs, err := dst.Attrs(ctx)
	// if err != nil {
	// 	return fmt.Errorf("object.Attrs: %w", err)
	// }
	// dst = dst.If(storage.Conditions{GenerationMatch: attrs.Generation})

	if _, err := dst.CopierFrom(src).Run(ctx); err != nil {
		return fmt.Errorf("Object(%q).CopierFrom(%q).Run: %w", dstName, object, err)
	}
	if err := src.Delete(ctx); err != nil {
		return fmt.Errorf("Object(%q).Delete: %w", object, err)
	}
	fmt.Fprintf(w, "Blob %v moved to %v.\n", object, dstName)
	return nil
}

Java

Pour en savoir plus, consultez la documentation de référence de l'API Cloud Storage en langage Java.


import com.google.cloud.storage.Blob;
import com.google.cloud.storage.BlobId;
import com.google.cloud.storage.Storage;
import com.google.cloud.storage.StorageOptions;

public class MoveObject {
  public static void moveObject(
      String projectId,
      String sourceBucketName,
      String sourceObjectName,
      String targetBucketName,
      String targetObjectName) {
    // The ID of your GCP project
    // String projectId = "your-project-id";

    // The ID of your GCS bucket
    // String bucketName = "your-unique-bucket-name";

    // The ID of your GCS object
    // String sourceObjectName = "your-object-name";

    // The ID of the bucket to move the object objectName to
    // String targetBucketName = "target-object-bucket"

    // The ID of your GCS object
    // String targetObjectName = "your-new-object-name";

    Storage storage = StorageOptions.newBuilder().setProjectId(projectId).build().getService();
    BlobId source = BlobId.of(sourceBucketName, sourceObjectName);
    BlobId target = BlobId.of(targetBucketName, targetObjectName);

    // Optional: set a generation-match precondition to avoid potential race
    // conditions and data corruptions. The request returns a 412 error if the
    // preconditions are not met.
    Storage.BlobTargetOption precondition;
    if (storage.get(targetBucketName, targetObjectName) == null) {
      // For a target object that does not yet exist, set the DoesNotExist precondition.
      // This will cause the request to fail if the object is created before the request runs.
      precondition = Storage.BlobTargetOption.doesNotExist();
    } else {
      // If the destination already exists in your bucket, instead set a generation-match
      // precondition. This will cause the request to fail if the existing object's generation
      // changes before the request runs.
      precondition =
          Storage.BlobTargetOption.generationMatch(
              storage.get(targetBucketName, targetObjectName).getGeneration());
    }

    // Copy source object to target object
    storage.copy(
        Storage.CopyRequest.newBuilder().setSource(source).setTarget(target, precondition).build());
    Blob copiedObject = storage.get(target);
    // Delete the original blob now that we've copied to where we want it, finishing the "move"
    // operation
    storage.get(source).delete();

    System.out.println(
        "Moved object "
            + sourceObjectName
            + " from bucket "
            + sourceBucketName
            + " to "
            + targetObjectName
            + " in bucket "
            + copiedObject.getBucket());
  }
}

Node.js

Pour en savoir plus, consultez la documentation de référence de l'API Cloud Storage en langage Node.js.

/**
 * TODO(developer): Uncomment the following lines before running the sample.
 */
// The ID of your GCS bucket
// const bucketName = 'your-source-bucket';

// The ID of your GCS file
// const srcFileName = 'your-file-name';

// The new ID for your GCS file
// const destFileName = 'your-new-file-name';

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

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

async function moveFile() {
  // Optional:
  // Set a generation-match precondition to avoid potential race conditions
  // and data corruptions. The request to copy is aborted if the object's
  // generation number does not match your precondition. For a destination
  // object that does not yet exist, set the ifGenerationMatch precondition to 0
  // If the destination object already exists in your bucket, set instead a
  // generation-match precondition using its generation number.
  const moveOptions = {
    preconditionOpts: {
      ifGenerationMatch: destinationGenerationMatchPrecondition,
    },
  };

  // Moves the file within the bucket
  await storage
    .bucket(bucketName)
    .file(srcFileName)
    .move(destFileName, moveOptions);

  console.log(
    `gs://${bucketName}/${srcFileName} moved to gs://${bucketName}/${destFileName}`
  );
}

moveFile().catch(console.error);

PHP

Pour en savoir plus, consultez la documentation de référence de l'API Cloud Storage en langage PHP.

use Google\Cloud\Storage\StorageClient;

/**
 * Move an object to a new name and/or bucket.
 *
 * @param string $bucketName The name of your Cloud Storage bucket.
 *        (e.g. 'my-bucket')
 * @param string $objectName The name of your Cloud Storage object.
 *        (e.g. 'my-object')
 * @param string $newBucketName the destination bucket name.
 *        (e.g. 'my-other-bucket')
 * @param string $newObjectName the destination object name.
 *        (e.g. 'my-other-object')
 */
function move_object(string $bucketName, string $objectName, string $newBucketName, string $newObjectName): void
{
    $storage = new StorageClient();
    $bucket = $storage->bucket($bucketName);
    $object = $bucket->object($objectName);
    $object->copy($newBucketName, ['name' => $newObjectName]);
    $object->delete();
    printf('Moved gs://%s/%s to gs://%s/%s' . PHP_EOL,
        $bucketName,
        $objectName,
        $newBucketName,
        $newObjectName);
}

Python

Pour en savoir plus, consultez la documentation de référence de l'API Cloud Storage en langage Python.

from google.cloud import storage


def move_blob(bucket_name, blob_name, destination_bucket_name, destination_blob_name,):
    """Moves a blob from one bucket to another with a new name."""
    # The ID of your GCS bucket
    # bucket_name = "your-bucket-name"
    # The ID of your GCS object
    # blob_name = "your-object-name"
    # The ID of the bucket to move the object to
    # destination_bucket_name = "destination-bucket-name"
    # The ID of your new GCS object (optional)
    # destination_blob_name = "destination-object-name"

    storage_client = storage.Client()

    source_bucket = storage_client.bucket(bucket_name)
    source_blob = source_bucket.blob(blob_name)
    destination_bucket = storage_client.bucket(destination_bucket_name)

    # Optional: set a generation-match precondition to avoid potential race conditions
    # and data corruptions. The request is aborted if the object's
    # generation number does not match your precondition. For a destination
    # object that does not yet exist, set the if_generation_match precondition to 0.
    # If the destination object already exists in your bucket, set instead a
    # generation-match precondition using its generation number.
    # There is also an `if_source_generation_match` parameter, which is not used in this example.
    destination_generation_match_precondition = 0

    blob_copy = source_bucket.copy_blob(
        source_blob, destination_bucket, destination_blob_name, if_generation_match=destination_generation_match_precondition,
    )
    source_bucket.delete_blob(blob_name)

    print(
        "Blob {} in bucket {} moved to blob {} in bucket {}.".format(
            source_blob.name,
            source_bucket.name,
            blob_copy.name,
            destination_bucket.name,
        )
    )

Ruby

Pour en savoir plus, consultez la documentation de référence de l'API Cloud Storage en langage Ruby.

def move_file bucket_name:, file_name:, new_name:
  # The ID of your GCS bucket
  # bucket_name = "your-unique-bucket-name"

  # The ID of your GCS object
  # file_name = "your-file-name"

  # The ID of your new GCS object
  # new_name = "your-new-file-name"

  require "google/cloud/storage"

  storage = Google::Cloud::Storage.new
  bucket  = storage.bucket bucket_name, skip_lookup: true
  file    = bucket.file file_name

  renamed_file = file.copy new_name

  file.delete

  puts "#{file_name} has been renamed to #{renamed_file.name}"
end

Étapes suivantes

Pour rechercher et filtrer des exemples de code pour d'autres produits Google Cloud, consultez l'explorateur d'exemples Google Cloud.