nextcloud/apps/files_external/3rdparty/aws-sdk-php/Aws/S3/Sync/DownloadSync.php

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<?php
/**
* Copyright 2010-2013 Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License").
* You may not use this file except in compliance with the License.
* A copy of the License is located at
*
* http://aws.amazon.com/apache2.0
*
* or in the "license" file accompanying this file. This file is distributed
* on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
* express or implied. See the License for the specific language governing
* permissions and limitations under the License.
*/
namespace Aws\S3\Sync;
use Aws\Common\Exception\RuntimeException;
use Aws\S3\ResumableDownload;
/**
* Downloads and Amazon S3 bucket to a local directory
*/
class DownloadSync extends AbstractSync
{
protected function createTransferAction(\SplFileInfo $file)
{
$sourceFilename = $file->getPathname();
list($bucket, $key) = explode('/', substr($sourceFilename, 5), 2);
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$filename = $this->options['source_converter']->convert($sourceFilename);
$this->createDirectory($filename);
// Some S3 buckets contains nested files under the same name as a directory
if (is_dir($filename)) {
return false;
}
// Allow a previously interrupted download to resume
if (file_exists($filename) && $this->options['resumable']) {
return new ResumableDownload($this->options['client'], $bucket, $key, $filename);
}
return $this->options['client']->getCommand('GetObject', array(
'Bucket' => $bucket,
'Key' => $key,
'SaveAs' => $filename
));
}
/**
* @codeCoverageIgnore
*/
protected function createDirectory($filename)
{
$directory = dirname($filename);
// Some S3 clients create empty files to denote directories. Remove these so that we can create the directory.
if (is_file($directory) && filesize($directory) == 0) {
unlink($directory);
}
// Create the directory if it does not exist
if (!is_dir($directory) && !mkdir($directory, 0777, true)) {
$errors = error_get_last();
throw new RuntimeException('Could not create directory: ' . $directory . ' - ' . $errors['message']);
}
}
protected function filterCommands(array $commands)
{
// Build a list of all of the directories in each command so that we don't attempt to create an empty dir in
// the same parallel transfer as attempting to create a file in that dir
$dirs = array();
foreach ($commands as $command) {
$parts = array_values(array_filter(explode('/', $command['SaveAs'])));
for ($i = 0, $total = count($parts); $i < $total; $i++) {
$dir = '';
for ($j = 0; $j < $i; $j++) {
$dir .= '/' . $parts[$j];
}
if ($dir && !in_array($dir, $dirs)) {
$dirs[] = $dir;
}
}
}
return array_filter($commands, function ($command) use ($dirs) {
return !in_array($command['SaveAs'], $dirs);
});
}
protected function transferCommands(array $commands)
{
parent::transferCommands($this->filterCommands($commands));
}
}