php - 如何更新 AWS S3 存储桶中的对象属性

Question

我已将近 25k 文件（大型媒体文件）上传到 s3 存储桶。我使用 AWS SDK2 for PHP ( S3Client::putObject) 来执行上传。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。

有没有办法在不需要重新上传文件的情况下执行此操作？请帮忙。

Answer 1

是的，您可以使用copyObject 方法，将CopySource参数设置为等于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 S3 对象上的缓存控制元数据

<?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";
}

Answer 3

尝试这个

用于删除现有对象

$keyname = 'product-file/my-object1.dll';
try
{
  $delete = $this->s3->deleteObject([
    'Bucket' => 'belisc',
    'Key'    => $keyname
  ]);

  if ($delete['DeleteMarker']){
    return true;
  } else {
    return false;
  }
}
catch (S3Exception $e) {
  return $e->getAwsErrorMessage();
}

对于检查对象

如果对象仍然存在，则返回true

$keyname = 'product-file/my-object1.dll';
try {
  $this->s3->getObject([
    'Bucket' => 'belisc',
    'Key'    => $keyname
  ]);

  return true;
} catch (S3Exception $e) {
  return $e->getAwsErrorMessage();
}

然后就可以上传新的了

try {
  return $this->s3->putObject([
    'Bucket' => 'belisc',
    'Key'    => 'product-file/MiFlashSetup_eng.rar',
    'SourceFile' => 'c:\MiFlashSetup_eng.rar'
  ]);
} catch (S3Exception $e) {
  die("There was an error uploading the file. ".$e->getAwsErrorMessage());
}