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415 lines
13 KiB
415 lines
13 KiB
<?php |
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/** |
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* @copyright Copyright (c) 2016, ownCloud, Inc. |
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* |
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* @author Arthur Schiwon <blizzz@arthur-schiwon.de> |
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* @author Bart Visscher <bartv@thisnet.nl> |
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* @author Björn Schießle <bjoern@schiessle.org> |
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* @author Clark Tomlinson <fallen013@gmail.com> |
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* @author Frank Karlitschek <frank@karlitschek.de> |
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* @author Jakob Sack <mail@jakobsack.de> |
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* @author Joas Schilling <coding@schilljs.com> |
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* @author Jörn Friedrich Dreyer <jfd@butonic.de> |
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* @author Ko- <k.stoffelen@cs.ru.nl> |
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* @author Lukas Reschke <lukas@statuscode.ch> |
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* @author Michael Gapczynski <GapczynskiM@gmail.com> |
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* @author Nicolai Ehemann <en@enlightened.de> |
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* @author noveens <noveen.sachdeva@research.iiit.ac.in> |
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* @author Piotr Filiciak <piotr@filiciak.pl> |
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* @author Robin Appelman <robin@icewind.nl> |
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* @author Robin McCorkell <robin@mccorkell.me.uk> |
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* @author Thibaut GRIDEL <tgridel@free.fr> |
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* @author Thomas Müller <thomas.mueller@tmit.eu> |
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* @author Victor Dubiniuk <dubiniuk@owncloud.com> |
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* @author Vincent Petry <pvince81@owncloud.com> |
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* |
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* @license AGPL-3.0 |
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* |
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* This code is free software: you can redistribute it and/or modify |
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* it under the terms of the GNU Affero General Public License, version 3, |
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* as published by the Free Software Foundation. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU Affero General Public License for more details. |
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* |
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* You should have received a copy of the GNU Affero General Public License, version 3, |
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* along with this program. If not, see <http://www.gnu.org/licenses/> |
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* |
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*/ |
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use OC\Files\View; |
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use OC\Streamer; |
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use OCP\ILogger; |
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use OCP\Lock\ILockingProvider; |
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/** |
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* Class for file server access |
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* |
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*/ |
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class OC_Files { |
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const FILE = 1; |
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const ZIP_FILES = 2; |
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const ZIP_DIR = 3; |
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const UPLOAD_MIN_LIMIT_BYTES = 1048576; // 1 MiB |
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private static $multipartBoundary = ''; |
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/** |
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* @return string |
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*/ |
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private static function getBoundary() { |
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if (empty(self::$multipartBoundary)) { |
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self::$multipartBoundary = md5(mt_rand()); |
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} |
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return self::$multipartBoundary; |
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} |
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/** |
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* @param string $filename |
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* @param string $name |
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* @param array $rangeArray ('from'=>int,'to'=>int), ... |
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*/ |
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private static function sendHeaders($filename, $name, array $rangeArray) { |
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OC_Response::setContentDispositionHeader($name, 'attachment'); |
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header('Content-Transfer-Encoding: binary', true); |
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header('Pragma: public');// enable caching in IE |
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header('Expires: 0'); |
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header("Cache-Control: must-revalidate, post-check=0, pre-check=0"); |
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$fileSize = \OC\Files\Filesystem::filesize($filename); |
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$type = \OC::$server->getMimeTypeDetector()->getSecureMimeType(\OC\Files\Filesystem::getMimeType($filename)); |
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if ($fileSize > -1) { |
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if (!empty($rangeArray)) { |
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http_response_code(206); |
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header('Accept-Ranges: bytes', true); |
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if (count($rangeArray) > 1) { |
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$type = 'multipart/byteranges; boundary='.self::getBoundary(); |
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// no Content-Length header here |
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} |
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else { |
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header(sprintf('Content-Range: bytes %d-%d/%d', $rangeArray[0]['from'], $rangeArray[0]['to'], $fileSize), true); |
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OC_Response::setContentLengthHeader($rangeArray[0]['to'] - $rangeArray[0]['from'] + 1); |
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} |
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} |
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else { |
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OC_Response::setContentLengthHeader($fileSize); |
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} |
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} |
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header('Content-Type: '.$type, true); |
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} |
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/** |
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* return the content of a file or return a zip file containing multiple files |
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* |
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* @param string $dir |
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* @param string $files ; separated list of files to download |
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* @param array $params ; 'head' boolean to only send header of the request ; 'range' http range header |
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*/ |
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public static function get($dir, $files, $params = null) { |
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$view = \OC\Files\Filesystem::getView(); |
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$getType = self::FILE; |
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$filename = $dir; |
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try { |
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if (is_array($files) && count($files) === 1) { |
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$files = $files[0]; |
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} |
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if (!is_array($files)) { |
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$filename = $dir . '/' . $files; |
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if (!$view->is_dir($filename)) { |
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self::getSingleFile($view, $dir, $files, is_null($params) ? array() : $params); |
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return; |
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} |
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} |
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$name = 'download'; |
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if (is_array($files)) { |
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$getType = self::ZIP_FILES; |
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$basename = basename($dir); |
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if ($basename) { |
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$name = $basename; |
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} |
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$filename = $dir . '/' . $name; |
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} else { |
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$filename = $dir . '/' . $files; |
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$getType = self::ZIP_DIR; |
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// downloading root ? |
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if ($files !== '') { |
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$name = $files; |
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} |
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} |
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self::lockFiles($view, $dir, $files); |
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/* Calculate filesize and number of files */ |
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if ($getType === self::ZIP_FILES) { |
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$fileInfos = array(); |
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$fileSize = 0; |
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foreach ($files as $file) { |
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$fileInfo = \OC\Files\Filesystem::getFileInfo($dir . '/' . $file); |
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$fileSize += $fileInfo->getSize(); |
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$fileInfos[] = $fileInfo; |
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} |
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$numberOfFiles = self::getNumberOfFiles($fileInfos); |
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} elseif ($getType === self::ZIP_DIR) { |
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$fileInfo = \OC\Files\Filesystem::getFileInfo($dir . '/' . $files); |
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$fileSize = $fileInfo->getSize(); |
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$numberOfFiles = self::getNumberOfFiles(array($fileInfo)); |
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} |
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$streamer = new Streamer(\OC::$server->getRequest(), $fileSize, $numberOfFiles); |
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OC_Util::obEnd(); |
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$streamer->sendHeaders($name); |
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$executionTime = (int)OC::$server->getIniWrapper()->getNumeric('max_execution_time'); |
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if (strpos(@ini_get('disable_functions'), 'set_time_limit') === false) { |
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@set_time_limit(0); |
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} |
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ignore_user_abort(true); |
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if ($getType === self::ZIP_FILES) { |
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foreach ($files as $file) { |
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$file = $dir . '/' . $file; |
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if (\OC\Files\Filesystem::is_file($file)) { |
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$userFolder = \OC::$server->getRootFolder()->get(\OC\Files\Filesystem::getRoot()); |
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$file = $userFolder->get($file); |
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if($file instanceof \OC\Files\Node\File) { |
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$fh = $file->fopen('r'); |
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$fileSize = $file->getSize(); |
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$fileTime = $file->getMTime(); |
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} else { |
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// File is not a file? … |
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\OC::$server->getLogger()->debug( |
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'File given, but no Node available. Name {file}', |
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[ 'app' => 'files', 'file' => $file ] |
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); |
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continue; |
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} |
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$streamer->addFileFromStream($fh, $file->getName(), $fileSize, $fileTime); |
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fclose($fh); |
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} elseif (\OC\Files\Filesystem::is_dir($file)) { |
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$streamer->addDirRecursive($file); |
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} |
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} |
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} elseif ($getType === self::ZIP_DIR) { |
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$file = $dir . '/' . $files; |
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$streamer->addDirRecursive($file); |
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} |
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$streamer->finalize(); |
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set_time_limit($executionTime); |
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self::unlockAllTheFiles($dir, $files, $getType, $view, $filename); |
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} catch (\OCP\Lock\LockedException $ex) { |
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self::unlockAllTheFiles($dir, $files, $getType, $view, $filename); |
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OC::$server->getLogger()->logException($ex); |
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$l = \OC::$server->getL10N('core'); |
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$hint = method_exists($ex, 'getHint') ? $ex->getHint() : ''; |
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\OC_Template::printErrorPage($l->t('File is currently busy, please try again later'), $hint, 200); |
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} catch (\OCP\Files\ForbiddenException $ex) { |
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self::unlockAllTheFiles($dir, $files, $getType, $view, $filename); |
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OC::$server->getLogger()->logException($ex); |
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$l = \OC::$server->getL10N('core'); |
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\OC_Template::printErrorPage($l->t('Can\'t read file'), $ex->getMessage(), 200); |
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} catch (\Exception $ex) { |
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self::unlockAllTheFiles($dir, $files, $getType, $view, $filename); |
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OC::$server->getLogger()->logException($ex); |
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$l = \OC::$server->getL10N('core'); |
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$hint = method_exists($ex, 'getHint') ? $ex->getHint() : ''; |
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\OC_Template::printErrorPage($l->t('Can\'t read file'), $hint, 200); |
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} |
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} |
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/** |
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* @param string $rangeHeaderPos |
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* @param int $fileSize |
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* @return array $rangeArray ('from'=>int,'to'=>int), ... |
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*/ |
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private static function parseHttpRangeHeader($rangeHeaderPos, $fileSize) { |
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$rArray=explode(',', $rangeHeaderPos); |
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$minOffset = 0; |
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$ind = 0; |
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$rangeArray = array(); |
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foreach ($rArray as $value) { |
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$ranges = explode('-', $value); |
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if (is_numeric($ranges[0])) { |
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if ($ranges[0] < $minOffset) { // case: bytes=500-700,601-999 |
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$ranges[0] = $minOffset; |
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} |
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if ($ind > 0 && $rangeArray[$ind-1]['to']+1 == $ranges[0]) { // case: bytes=500-600,601-999 |
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$ind--; |
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$ranges[0] = $rangeArray[$ind]['from']; |
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} |
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} |
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if (is_numeric($ranges[0]) && is_numeric($ranges[1]) && $ranges[0] < $fileSize && $ranges[0] <= $ranges[1]) { |
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// case: x-x |
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if ($ranges[1] >= $fileSize) { |
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$ranges[1] = $fileSize-1; |
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} |
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$rangeArray[$ind++] = array( 'from' => $ranges[0], 'to' => $ranges[1], 'size' => $fileSize ); |
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$minOffset = $ranges[1] + 1; |
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if ($minOffset >= $fileSize) { |
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break; |
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} |
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} |
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elseif (is_numeric($ranges[0]) && $ranges[0] < $fileSize) { |
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// case: x- |
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$rangeArray[$ind++] = array( 'from' => $ranges[0], 'to' => $fileSize-1, 'size' => $fileSize ); |
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break; |
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} |
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elseif (is_numeric($ranges[1])) { |
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// case: -x |
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if ($ranges[1] > $fileSize) { |
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$ranges[1] = $fileSize; |
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} |
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$rangeArray[$ind++] = array( 'from' => $fileSize-$ranges[1], 'to' => $fileSize-1, 'size' => $fileSize ); |
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break; |
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} |
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} |
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return $rangeArray; |
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} |
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/** |
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* @param View $view |
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* @param string $name |
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* @param string $dir |
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* @param array $params ; 'head' boolean to only send header of the request ; 'range' http range header |
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*/ |
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private static function getSingleFile($view, $dir, $name, $params) { |
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$filename = $dir . '/' . $name; |
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OC_Util::obEnd(); |
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$view->lockFile($filename, ILockingProvider::LOCK_SHARED); |
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$rangeArray = array(); |
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if (isset($params['range']) && substr($params['range'], 0, 6) === 'bytes=') { |
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$rangeArray = self::parseHttpRangeHeader(substr($params['range'], 6), |
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\OC\Files\Filesystem::filesize($filename)); |
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} |
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if (\OC\Files\Filesystem::isReadable($filename)) { |
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self::sendHeaders($filename, $name, $rangeArray); |
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} elseif (!\OC\Files\Filesystem::file_exists($filename)) { |
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http_response_code(404); |
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$tmpl = new OC_Template('', '404', 'guest'); |
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$tmpl->printPage(); |
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exit(); |
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} else { |
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http_response_code(403); |
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die('403 Forbidden'); |
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} |
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if (isset($params['head']) && $params['head']) { |
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return; |
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} |
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if (!empty($rangeArray)) { |
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try { |
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if (count($rangeArray) == 1) { |
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$view->readfilePart($filename, $rangeArray[0]['from'], $rangeArray[0]['to']); |
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} |
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else { |
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// check if file is seekable (if not throw UnseekableException) |
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// we have to check it before body contents |
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$view->readfilePart($filename, $rangeArray[0]['size'], $rangeArray[0]['size']); |
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$type = \OC::$server->getMimeTypeDetector()->getSecureMimeType(\OC\Files\Filesystem::getMimeType($filename)); |
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foreach ($rangeArray as $range) { |
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echo "\r\n--".self::getBoundary()."\r\n". |
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"Content-type: ".$type."\r\n". |
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"Content-range: bytes ".$range['from']."-".$range['to']."/".$range['size']."\r\n\r\n"; |
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$view->readfilePart($filename, $range['from'], $range['to']); |
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} |
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echo "\r\n--".self::getBoundary()."--\r\n"; |
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} |
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} catch (\OCP\Files\UnseekableException $ex) { |
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// file is unseekable |
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header_remove('Accept-Ranges'); |
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header_remove('Content-Range'); |
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http_response_code(200); |
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self::sendHeaders($filename, $name, array()); |
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$view->readfile($filename); |
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} |
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} |
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else { |
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$view->readfile($filename); |
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} |
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} |
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/** |
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* Returns the total (recursive) number of files and folders in the given |
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* FileInfos. |
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* |
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* @param \OCP\Files\FileInfo[] $fileInfos the FileInfos to count |
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* @return int the total number of files and folders |
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*/ |
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private static function getNumberOfFiles($fileInfos) { |
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$numberOfFiles = 0; |
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$view = new View(); |
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while ($fileInfo = array_pop($fileInfos)) { |
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$numberOfFiles++; |
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if ($fileInfo->getType() === \OCP\Files\FileInfo::TYPE_FOLDER) { |
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$fileInfos = array_merge($fileInfos, $view->getDirectoryContent($fileInfo->getPath())); |
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} |
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} |
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return $numberOfFiles; |
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} |
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/** |
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* @param View $view |
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* @param string $dir |
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* @param string[]|string $files |
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*/ |
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public static function lockFiles($view, $dir, $files) { |
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if (!is_array($files)) { |
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$file = $dir . '/' . $files; |
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$files = [$file]; |
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} |
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foreach ($files as $file) { |
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$file = $dir . '/' . $file; |
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$view->lockFile($file, ILockingProvider::LOCK_SHARED); |
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if ($view->is_dir($file)) { |
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$contents = $view->getDirectoryContent($file); |
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$contents = array_map(function($fileInfo) use ($file) { |
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/** @var \OCP\Files\FileInfo $fileInfo */ |
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return $file . '/' . $fileInfo->getName(); |
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}, $contents); |
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self::lockFiles($view, $dir, $contents); |
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} |
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} |
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} |
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/** |
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* @param string $dir |
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* @param $files |
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* @param integer $getType |
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* @param View $view |
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* @param string $filename |
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*/ |
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private static function unlockAllTheFiles($dir, $files, $getType, $view, $filename) { |
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if ($getType === self::FILE) { |
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$view->unlockFile($filename, ILockingProvider::LOCK_SHARED); |
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} |
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if ($getType === self::ZIP_FILES) { |
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foreach ($files as $file) { |
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$file = $dir . '/' . $file; |
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$view->unlockFile($file, ILockingProvider::LOCK_SHARED); |
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} |
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} |
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if ($getType === self::ZIP_DIR) { |
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$file = $dir . '/' . $files; |
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$view->unlockFile($file, ILockingProvider::LOCK_SHARED); |
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} |
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} |
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}
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