Create & zip & Download an S3 folder/multiple-files with AWS SDK PHP - php

Question

I'm willing to create a php function, trigger in js, that can :
Retrieve all AWS S3 bucket files from a specific folder (I can also provide the path of each files)
Create a Zip containing all S3 files
Download the Zip when the trigger is hit (cta)
I'm able to download a single file with the getObject method from this example However, I can't find any informations in order to download multiple file and Zip it.
I tried the downloadBucket method, however it download all files inside my project architecture and not as a zip file.
Here is my code:
<?php
// AWS Info + Connection
$IAM_KEY = 'XXXXX';
$IAM_SECRET = 'XXXXX';
$region = 'XXXXX';
require '../../vendor/autoload.php';
use Aws\S3\S3Client;
use Aws\S3\Exception\S3Exception;
$FolderToDownload="FolderToDownload";
// Connection OK
$s3 = S3Client::factory(
array(
'credentials' => array(
'key' => $IAM_KEY,
'secret' => $IAM_SECRET
),
'version' => 'latest',
'region' => $region
)
);
try {
$bucketName = 'XXXXX';
$destination = 'NeedAZipFileNotAFolderPath';
$options = array('debug'=>true);
// ADD All Files into the folder: NeedAZipFileNotAFolderPath/Files1.png...Files12.png...
$s3->downloadBucket($destination,$bucketName,$FolderToDownload,$options);
// Looking for a zip file that can be downloaded
// Can I use downloadBucket? Is there a better way to do it?
// if needed I can create an array of all files (paths) that needs to be added to the zip file & dl
} catch (S3Exception $e) {
echo $e->getMessage() . PHP_EOL;
}
?>
If some one can help, would be nice.
Thanks

Answer 1

You can use ZipArchive, list the objects from a prefix (the bucket's folder). In the case, I also use 'registerStreamWrapper' to get the keys and added to the created zip file.
Something like that:
<?php
require '/path/to/sdk-or-autoloader';
$s3 = Aws\S3\S3Client::factory(/* sdk config */);
$s3->registerStreamWrapper();
$zip = new ZipArchive;
$zip->open('/path/to/zip-you-are-creating.zip', ZipArchive::CREATE);
$bucket = 'your-bucket';
$prefix = 'your-prefix-folder'; // ex.: 'image/test/folder/'
$objects = $s3->getIterator('ListObjects', array(
'Bucket' => $bucket,
'Prefix' => $prefix
));
foreach ($objects as $object) {
$contents = file_get_contents("s3://{$bucket}/{$object['Key']}"); // get file
$zip->addFromString($object['Key'], $contents); // add file contents in zip
}
$zip->close();
// Download de zip file
header("Content-Description: File Transfer");
header("Content-Type: application/octet-stream");
header("Content-Disposition: attachment; filename=\"/path/to/zip-you-are-creating.zip\"");
readfile ('/path/to/zip-you-are-creating.zip');
?>
You can also delete the zip file after the download, if you prefer.
Must work in most of cases, but I don't want to save the file in the server, but I don't see how I can download multiple objects directly from the AWS S3 bucket by the browser without saving a file in my server. If anyone know, please share with us.