How to update object properties in a AWS S3 Bucket - php

Question

I've uploaded nearly 25k files (large media files) to an s3 bucket. I used AWS SDK2 for PHP (S3Client::putObject) to perform uploads. Now, I need to update metadata for these files i.e change the ContentDisposition to attachment and assign a filename.
Is there a way to perform this without requiring to re-upload the file? Please help.

Answer 1

Yes, you can use the copyObject method, where you set the CopySource parameter equal to the Bucket and Key parameters.
Example:
// 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

Update Cache Control Metadata on S3 Objects
<?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

Try this
For delete existing object
$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();
}
For check object
return true if object is still exists
$keyname = 'product-file/my-object1.dll';
try {
$this->s3->getObject([
'Bucket' => 'belisc',
'Key' => $keyname
]);
return true;
} catch (S3Exception $e) {
return $e->getAwsErrorMessage();
}
Then you can upload the new one
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());
}