如何更新AWS S3存储桶中的对象属性

Question

我已将近25k个文件（大型媒体文件）上传到s3存储桶。我用PHP的AWS SDK2（S3Client::putObject）执行上传。现在，我需要更新这些文件的元数据，即将ContentDisposition更改为附件并分配文件名。

有没有办法执行此操作而无需重新上传文件？请帮忙。

Answer 1

是的，您可以使用copyObject method，其中您设置CopySource参数等于Bucket和Key参数。

例子：

// setup your $s3 connection, and define the bucket and key for your resource. 
$s3->copyObject(array(
    'Bucket' => $bucket, 
    'CopySource' => "$bucket/$key", 
    'Key' => $key, 
    'Metadata' => array(
    'ExtraHeader' => 'HEADER VALUE' 
), 
    'MetadataDirective' => 'REPLACE' 
)); 

Answer 2

更新缓存控制元数据的S3对象

<?php 
define('S3_BUCKET', 'bucket-name'); 
define('S3_ACCESS_KEY', 'your-access-key'); 
define('S3_SECRET_KEY', 'secret-key'); 
define('S3_REGION', 'ap-south-1'); //Mumbai 

require 'vendors/aws/aws-autoloader.php'; 

use Aws\S3\S3Client; 
use Aws\S3\Exception\S3Exception; 

try { 
    $s3 = S3Client::factory(array(
       'version' => 'latest', 
       'region' => S3_REGION, 
       'credentials' => array(
        'secret' => S3_SECRET_KEY, 
        'key' => S3_ACCESS_KEY, 
       ) 
    )); 

    $objects = $this->s3->getIterator('ListObjects', array('Bucket' => S3_BUCKET)); 

    echo "Keys retrieved!\n"; 
    foreach ($objects as $object) { 
     echo $object['Key'] . "\n"; 
     $s3->copyObject(array(
      'Bucket' => S3_BUCKET, 
      'CopySource' => S3_BUCKET . '/' . $object['Key'], 
      'Key' => $key, 
      'ContentType' => 'image/jpeg', 
      'ACL' => 'public-read', 
      'StorageClass' => 'REDUCED_REDUNDANCY', 
      'CacheControl' => 'max-age=172800', 
      'MetadataDirective' => 'REPLACE' 
     )); 
    } 
} catch (S3Exception $e) { 
    echo $e->getMessage() . "\n"; 
}