Obtención de etiquetas de objetos con OSS SDK for PHP 2.0 - Object Storage Service

Este tema describe cómo obtener las etiquetas de un objeto mediante OSS SDK for PHP 2.0.

Notas de uso

El código de ejemplo de este tema utiliza el ID de región cn-hangzhou, correspondiente a la región China (Hangzhou). De forma predeterminada, se usa un endpoint público para acceder a los recursos de un bucket. Si necesita acceder a los recursos del bucket desde otros servicios de Alibaba Cloud ubicados en la misma región que el bucket, utilice un endpoint interno. Para más información sobre las regiones y los endpoints que admite OSS, consulte Regions and endpoints.
Para obtener las etiquetas de un objeto, debe contar con el permiso oss:GetObjectTagging. Para más información, consulte Grant custom permissions to a RAM user.

Remarque

Se utiliza un par clave-valor para identificar objetos. Para más información sobre el etiquetado de objetos, consulte Tag objects.
Para más detalles sobre cómo obtener las etiquetas de un objeto, consulte GetObjectTagging.

Código de ejemplo

A continuación se muestra un ejemplo de cómo consultar las etiquetas de una versión específica de un objeto dentro de un bucket:

<?php

// Import the autoloader file to ensure that dependency libraries are correctly loaded.
require_once __DIR__ . '/../vendor/autoload.php';

use AlibabaCloud\Oss\V2 as Oss;

// Define the description of command-line arguments.
$optsdesc = [
    "region" => ['help' => 'The region in which the bucket is located.', 'required' => True], // The region where the bucket is located. This parameter is required.
    "endpoint" => ['help' => 'The domain names that other services can use to access OSS.', 'required' => False], // The endpoint that other services can use to access OSS. This parameter is optional.
    "bucket" => ['help' => 'The name of the bucket', 'required' => True], // The name of the bucket. This parameter is required.
    "key" => ['help' => 'The name of the object', 'required' => True], // The name of the object. This parameter is required.
];

// Convert the argument descriptions to the long option format required by getopt.
// A colon (:) after each argument indicates that the argument requires a value.
$longopts = \array_map(function ($key) {
    return "$key:";
}, array_keys($optsdesc));

// Parse the command-line arguments.
$options = getopt("", $longopts);

// Check whether required arguments are specified.
foreach ($optsdesc as $key => $value) {
    if ($value['required'] === True && empty($options[$key])) {
        $help = $value['help']; // Obtain the help information of the argument.
        echo "Error: the following arguments are required: --$key, $help" . PHP_EOL;
        exit(1); // If a required argument is not specified, exit the program.
    }
}

// Extract values from the parsed arguments.
$region = $options["region"]; // The region where the bucket is located.
$bucket = $options["bucket"]; // The name of the bucket.
$key = $options["key"];       // The name of the object.

// Load the credentials from environment variables.
// Use EnvironmentVariableCredentialsProvider to read the Access Key ID and Access Key Secret from environment variables.
$credentialsProvider = new Oss\Credentials\EnvironmentVariableCredentialsProvider();

// Use the default configurations of the SDK.
$cfg = Oss\Config::loadDefault();
$cfg->setCredentialsProvider($credentialsProvider); // Set the credential provider.
$cfg->setRegion($region); // Set the region where the bucket is located.
if (isset($options["endpoint"])) {
    $cfg->setEndpoint($options["endpoint"]); // If an endpoint is provided, set the endpoint.
}

// Create an OSS client instance.
$client = new Oss\Client($cfg);

// Create a GetObjectTaggingRequest object to obtain the tag information of the object.
$request = new Oss\Models\GetObjectTaggingRequest(
    bucket: $bucket,
    key: $key
);

// Execute the operation to obtain object tags.
$result = $client->getObjectTagging($request);

// Print the result of obtaining object tags.
printf(
    'status code:' . $result->statusCode . PHP_EOL . // The HTTP status code. For example, 200 indicates that the request is successful.
    'request id:' . $result->requestId . PHP_EOL .   // The request ID, which is used to debug or track requests.
    'result:' . var_export($result, true) . PHP_EOL  // The detailed result of the obtained object tags.
);