104 lines
2.8 KiB
PHP
104 lines
2.8 KiB
PHP
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<?php
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/**
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* Copyright (c) 2014 Andreas Fischer <bantu@owncloud.com>
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* This file is licensed under the Affero General Public License version 3 or
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* later.
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* See the COPYING-README file.
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*/
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namespace OC;
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/**
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* Helper class for large files on 32-bit platforms.
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*/
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class LargeFileHelper {
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/**
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* @brief Tries to get the filesize of a file via various workarounds that
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* even work for large files on 32-bit platforms.
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*
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* @param string $filename Path to the file.
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*
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* @return null|int|float Number of bytes as number (float or int) or
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* null on failure.
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*/
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public function getFilesize($filename) {
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$filesize = $this->getFilesizeViaCurl($filename);
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if (!is_null($filesize)) {
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return $filesize;
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}
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$filesize = $this->getFilesizeViaCOM($filename);
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if (!is_null($filesize)) {
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return $filesize;
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}
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$filesize = $this->getFilesizeViaExec($filename);
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if (!is_null($filesize)) {
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return $filesize;
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}
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return null;
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}
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/**
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* @brief Tries to get the filesize of a file via a CURL HEAD request.
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*
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* @param string $filename Path to the file.
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*
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* @return null|int|float Number of bytes as number (float or int) or
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* null on failure.
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*/
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public function getFilesizeViaCurl($filename) {
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if (function_exists('curl_init')) {
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$ch = curl_init("file://$filename");
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curl_setopt($ch, CURLOPT_NOBODY, true);
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curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
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curl_setopt($ch, CURLOPT_HEADER, true);
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$data = curl_exec($ch);
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curl_close($ch);
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if ($data !== false) {
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$matches = array();
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preg_match('/Content-Length: (\d+)/', $data, $matches);
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if (isset($matches[1])) {
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return 0 + $matches[1];
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}
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}
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}
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return null;
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}
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/**
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* @brief Tries to get the filesize of a file via the Windows DOM extension.
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*
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* @param string $filename Path to the file.
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*
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* @return null|int|float Number of bytes as number (float or int) or
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* null on failure.
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*/
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public function getFilesizeViaCOM($filename) {
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if (class_exists('COM')) {
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$fsobj = new \COM("Scripting.FileSystemObject");
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$file = $fsobj->GetFile($filename);
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return 0 + $file->Size;
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}
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return null;
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}
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/**
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* @brief Tries to get the filesize of a file via an exec() call.
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*
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* @param string $filename Path to the file.
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*
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* @return null|int|float Number of bytes as number (float or int) or
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* null on failure.
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*/
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public function getFilesizeViaExec($filename) {
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if (\OC_Helper::is_function_enabled('exec')) {
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$os = strtolower(php_uname('s'));
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if (strpos($os, 'linux') !== false) {
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return 0 + exec('stat -c %s ' . escapeshellarg($filename));
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} else if (strpos($os, 'bsd') !== false) {
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return 0 + exec('stat -f %z ' . escapeshellarg($filename));
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}
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}
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return null;
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}
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}
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