Obtener la LCA de un objeto que se filtró por usuario

Consulta la lista de control de acceso (LCA) de un objeto en un bucket de Cloud Storage filtrado por el usuario.

Muestra de código

C++

Si deseas obtener más información, consulta la documentación de referencia de la API de Cloud Storage C++.

Para autenticarte en Cloud Storage, configura las credenciales predeterminadas de la aplicación. Si deseas obtener más información, consulta Configura la autenticación para un entorno de desarrollo local.

namespace gcs = ::google::cloud::storage;
using ::google::cloud::StatusOr;
[](gcs::Client client, std::string const& bucket_name,
   std::string const& object_name, std::string const& entity) {
  StatusOr<gcs::ObjectAccessControl> acl =
      client.GetObjectAcl(bucket_name, object_name, entity);

  if (!acl) throw std::move(acl).status();
  std::cout << "ACL entry for " << acl->entity() << " in object "
            << acl->object() << " in bucket " << acl->bucket() << " is "
            << *acl << "\n";
}

C#

Si deseas obtener más información, consulta la documentación de referencia de la API de Cloud Storage C#.


using Google.Apis.Storage.v1.Data;
using Google.Cloud.Storage.V1;
using System;
using System.Collections.Generic;
using System.Linq;

public class PrintFileAclForUserSample
{
    public IEnumerable<ObjectAccessControl> PrintFileAclForUser(
        string bucketName = "your-unique-bucket-name",
        string objectName = "your-object-name",
        string userEmail = "user@iam.gserviceaccount.com")
    {
        var storage = StorageClient.Create();
        var storageObject = storage.GetObject(bucketName, objectName, new GetObjectOptions
        {
            Projection = Projection.Full
        });

        var fileAclForUser = storageObject.Acl.Where((acl) => acl.Entity == $"user-{userEmail}");
        foreach (var acl in fileAclForUser)
        {
            Console.WriteLine($"{acl.Role}:{acl.Entity}");
        }

        return fileAclForUser;
    }
}

Go

Si deseas obtener más información, consulta la documentación de referencia de la API de Cloud Storage Go.

import (
	"context"
	"fmt"
	"io"

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

// printFileACLForUser lists ACL of the specified object with filter.
func printFileACLForUser(w io.Writer, bucket, object string, entity storage.ACLEntity) error {
	// bucket := "bucket-name"
	// object := "object-name"
	// entity := storage.AllAuthenticatedUsers
	ctx := context.Background()
	client, err := storage.NewClient(ctx)
	if err != nil {
		return fmt.Errorf("storage.NewClient: %w", err)
	}
	defer client.Close()

	rules, err := client.Bucket(bucket).ACL().List(ctx)
	if err != nil {
		return fmt.Errorf("ACLHandle.List: %w", err)
	}
	for _, r := range rules {
		if r.Entity == entity {
			fmt.Fprintf(w, "ACL rule role: %v\n", r.Role)
		}
	}
	return nil
}

Java

Si deseas obtener más información, consulta la documentación de referencia de la API de Cloud Storage Java.


import com.google.cloud.storage.Acl;
import com.google.cloud.storage.Acl.User;
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 PrintFileAclForUser {

  public static void printFileAclForUser(String bucketName, String blobName, String userEmail) {

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

    // The name of the blob/file that you wish to view Acls of
    // String blobName = "your-blob-name";

    // The email of the user whose acl is being retrieved.
    // String userEmail = "someuser@domain.com"

    Storage storage = StorageOptions.newBuilder().build().getService();
    Blob blob = storage.get(BlobId.of(bucketName, blobName));
    Acl blobAcl = blob.getAcl(new User(userEmail));
    if (blobAcl != null) {
      String userRole = blobAcl.getRole().name();
      System.out.println("User " + userEmail + " has role " + userRole);
    } else {
      System.out.println("User " + userEmail + " not found");
    }
  }
}

Node.js

Si deseas obtener más información, consulta la documentación de referencia de la API de Cloud Storage Node.js.

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

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

// The email address of the user to check
// const userEmail = 'user-email-to-check';

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

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

async function printFileAclForUser() {
  const options = {
    // Specify the user
    entity: `user-${userEmail}`,
  };

  // Gets the user's ACL for the file
  const [aclObject] = await storage
    .bucket(bucketName)
    .file(fileName)
    .acl.get(options);

  console.log(`${aclObject.role}: ${aclObject.entity}`);
}

printFileAclForUser().catch(console.error);

PHP

Si deseas obtener más información, consulta la documentación de referencia de la API de Cloud Storage PHP.

use Google\Cloud\Storage\StorageClient;

/**
 * Print an entity role for a file ACL.
 *
 * @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 $entity The entity for which to query access controls.
 *        (e.g. 'user-example@domain.com')
 */
function print_file_acl_for_user(
    string $bucketName,
    string $objectName,
    string $entity
): void {
    $storage = new StorageClient();
    $bucket = $storage->bucket($bucketName);
    $object = $bucket->object($objectName);
    $acl = $object->acl();
    $item = $acl->get(['entity' => $entity]);
    printf('%s: %s' . PHP_EOL, $item['entity'], $item['role']);
}

Python

Si deseas obtener más información, consulta la documentación de referencia de la API de Cloud Storage Python.

from google.cloud import storage


def print_blob_acl_for_user(bucket_name, blob_name, user_email):
    """Prints out a blob's access control list for a given user."""

    storage_client = storage.Client()
    bucket = storage_client.bucket(bucket_name)
    blob = bucket.blob(blob_name)

    # Reload fetches the current ACL from Cloud Storage.
    blob.acl.reload()

    # You can also use `group`, `domain`, `all_authenticated` and `all` to
    # get the roles for different types of entities.
    roles = blob.acl.user(user_email).get_roles()

    print(roles)

Ruby

Si deseas obtener más información, consulta la documentación de referencia de la API de Cloud Storage Ruby.

# The ID of your GCS bucket
# bucket_name = "your-unique-bucket-name"
# file_name   = "Name of a file in the Storage bucket"
# email       = "Google Cloud Storage ACL Entity email"

require "google/cloud/storage"

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

puts "Permissions for #{email}:"
puts "OWNER"  if file.acl.owners.include?  email
puts "READER" if file.acl.readers.include? email

¿Qué sigue?

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