251 lines
7.7 KiB
PHP
251 lines
7.7 KiB
PHP
<?php
|
|
|
|
/**
|
|
* ownCloud
|
|
*
|
|
* @author Frank Karlitschek
|
|
* @copyright 2012 Frank Karlitschek frank@owncloud.org
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
|
|
* License as published by the Free Software Foundation; either
|
|
* version 3 of the License, or any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU AFFERO GENERAL PUBLIC LICENSE for more details.
|
|
*
|
|
* You should have received a copy of the GNU Affero General Public
|
|
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
|
|
*
|
|
*/
|
|
|
|
/**
|
|
* Class for fileserver access
|
|
*
|
|
*/
|
|
class OC_Files {
|
|
static $tmpFiles = array();
|
|
|
|
/**
|
|
* return the content of a file or return a zip file containning multiply files
|
|
*
|
|
* @param string $dir
|
|
* @param string $file ; seperated list of files to download
|
|
* @param boolean $only_header ; boolean to only send header of the request
|
|
*/
|
|
public static function get($dir, $files, $only_header = false) {
|
|
if (strpos($files, ';')) {
|
|
$files = explode(';', $files);
|
|
}
|
|
|
|
if (is_array($files)) {
|
|
self::validateZipDownload($dir, $files);
|
|
$executionTime = intval(ini_get('max_execution_time'));
|
|
set_time_limit(0);
|
|
$zip = new ZipArchive();
|
|
$filename = OC_Helper::tmpFile('.zip');
|
|
if ($zip->open($filename, ZIPARCHIVE::CREATE | ZIPARCHIVE::OVERWRITE) !== true) {
|
|
exit("cannot open <$filename>\n");
|
|
}
|
|
foreach ($files as $file) {
|
|
$file = $dir . '/' . $file;
|
|
if (\OC\Files\Filesystem::is_file($file)) {
|
|
$tmpFile = \OC\Files\Filesystem::toTmpFile($file);
|
|
self::$tmpFiles[] = $tmpFile;
|
|
$zip->addFile($tmpFile, basename($file));
|
|
} elseif (\OC\Files\Filesystem::is_dir($file)) {
|
|
self::zipAddDir($file, $zip);
|
|
}
|
|
}
|
|
$zip->close();
|
|
set_time_limit($executionTime);
|
|
} elseif (\OC\Files\Filesystem::is_dir($dir . '/' . $files)) {
|
|
self::validateZipDownload($dir, $files);
|
|
$executionTime = intval(ini_get('max_execution_time'));
|
|
set_time_limit(0);
|
|
$zip = new ZipArchive();
|
|
$filename = OC_Helper::tmpFile('.zip');
|
|
if ($zip->open($filename, ZIPARCHIVE::CREATE | ZIPARCHIVE::OVERWRITE) !== true) {
|
|
exit("cannot open <$filename>\n");
|
|
}
|
|
$file = $dir . '/' . $files;
|
|
self::zipAddDir($file, $zip);
|
|
$zip->close();
|
|
set_time_limit($executionTime);
|
|
} else {
|
|
$zip = false;
|
|
$filename = $dir . '/' . $files;
|
|
}
|
|
@ob_end_clean();
|
|
if ($zip or \OC\Files\Filesystem::isReadable($filename)) {
|
|
header('Content-Disposition: attachment; filename="' . basename($filename) . '"');
|
|
header('Content-Transfer-Encoding: binary');
|
|
OC_Response::disableCaching();
|
|
if ($zip) {
|
|
ini_set('zlib.output_compression', 'off');
|
|
header('Content-Type: application/zip');
|
|
header('Content-Length: ' . filesize($filename));
|
|
} else {
|
|
header('Content-Type: ' . \OC\Files\Filesystem::getMimeType($filename));
|
|
}
|
|
} elseif ($zip or !\OC\Files\Filesystem::file_exists($filename)) {
|
|
header("HTTP/1.0 404 Not Found");
|
|
$tmpl = new OC_Template('', '404', 'guest');
|
|
$tmpl->assign('file', $filename);
|
|
$tmpl->printPage();
|
|
} else {
|
|
header("HTTP/1.0 403 Forbidden");
|
|
die('403 Forbidden');
|
|
}
|
|
if ($only_header) {
|
|
if (!$zip)
|
|
header("Content-Length: " . \OC\Files\Filesystem::filesize($filename));
|
|
return;
|
|
}
|
|
if ($zip) {
|
|
$handle = fopen($filename, 'r');
|
|
if ($handle) {
|
|
$chunkSize = 8 * 1024; // 1 MB chunks
|
|
while (!feof($handle)) {
|
|
echo fread($handle, $chunkSize);
|
|
flush();
|
|
}
|
|
}
|
|
unlink($filename);
|
|
} else {
|
|
\OC\Files\Filesystem::readfile($filename);
|
|
}
|
|
foreach (self::$tmpFiles as $tmpFile) {
|
|
if (file_exists($tmpFile) and is_file($tmpFile)) {
|
|
unlink($tmpFile);
|
|
}
|
|
}
|
|
}
|
|
|
|
public static function zipAddDir($dir, $zip, $internalDir = '') {
|
|
$dirname = basename($dir);
|
|
$zip->addEmptyDir($internalDir . $dirname);
|
|
$internalDir .= $dirname .= '/';
|
|
$files = \OC\Files\Filesystem::getDirectoryContent($dir);
|
|
foreach ($files as $file) {
|
|
$filename = $file['name'];
|
|
$file = $dir . '/' . $filename;
|
|
if (\OC\Files\Filesystem::is_file($file)) {
|
|
$tmpFile = \OC\Files\Filesystem::toTmpFile($file);
|
|
OC_Files::$tmpFiles[] = $tmpFile;
|
|
$zip->addFile($tmpFile, $internalDir . $filename);
|
|
} elseif (\OC\Files\Filesystem::is_dir($file)) {
|
|
self::zipAddDir($file, $zip, $internalDir);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* checks if the selected files are within the size constraint. If not, outputs an error page.
|
|
*
|
|
* @param dir $dir
|
|
* @param files $files
|
|
*/
|
|
static function validateZipDownload($dir, $files) {
|
|
if (!OC_Config::getValue('allowZipDownload', true)) {
|
|
$l = OC_L10N::get('lib');
|
|
header("HTTP/1.0 409 Conflict");
|
|
$tmpl = new OC_Template('', 'error', 'user');
|
|
$errors = array(
|
|
array(
|
|
'error' => $l->t('ZIP download is turned off.'),
|
|
'hint' => $l->t('Files need to be downloaded one by one.') . '<br/><a href="javascript:history.back()">' . $l->t('Back to Files') . '</a>',
|
|
)
|
|
);
|
|
$tmpl->assign('errors', $errors);
|
|
$tmpl->printPage();
|
|
exit;
|
|
}
|
|
|
|
$zipLimit = OC_Config::getValue('maxZipInputSize', OC_Helper::computerFileSize('800 MB'));
|
|
if ($zipLimit > 0) {
|
|
$totalsize = 0;
|
|
if (is_array($files)) {
|
|
foreach ($files as $file) {
|
|
$totalsize += \OC\Files\Filesystem::filesize($dir . '/' . $file);
|
|
}
|
|
} else {
|
|
$totalsize += \OC\Files\Filesystem::filesize($dir . '/' . $files);
|
|
}
|
|
if ($totalsize > $zipLimit) {
|
|
$l = OC_L10N::get('lib');
|
|
header("HTTP/1.0 409 Conflict");
|
|
$tmpl = new OC_Template('', 'error', 'user');
|
|
$errors = array(
|
|
array(
|
|
'error' => $l->t('Selected files too large to generate zip file.'),
|
|
'hint' => 'Download the files in smaller chunks, seperately or kindly ask your administrator.<br/><a href="javascript:history.back()">' . $l->t('Back to Files') . '</a>',
|
|
)
|
|
);
|
|
$tmpl->assign('errors', $errors);
|
|
$tmpl->printPage();
|
|
exit;
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* set the maximum upload size limit for apache hosts using .htaccess
|
|
*
|
|
* @param int size filesisze in bytes
|
|
* @return false on failure, size on success
|
|
*/
|
|
static function setUploadLimit($size) {
|
|
//don't allow user to break his config -- upper boundary
|
|
if ($size > PHP_INT_MAX) {
|
|
//max size is always 1 byte lower than computerFileSize returns
|
|
if ($size > PHP_INT_MAX + 1)
|
|
return false;
|
|
$size -= 1;
|
|
} else {
|
|
$size = OC_Helper::humanFileSize($size);
|
|
$size = substr($size, 0, -1); //strip the B
|
|
$size = str_replace(' ', '', $size); //remove the space between the size and the postfix
|
|
}
|
|
|
|
//don't allow user to break his config -- broken or malicious size input
|
|
if (intval($size) == 0) {
|
|
return false;
|
|
}
|
|
|
|
$htaccess = @file_get_contents(OC::$SERVERROOT . '/.htaccess'); //supress errors in case we don't have permissions for
|
|
if (!$htaccess) {
|
|
return false;
|
|
}
|
|
|
|
$phpValueKeys = array(
|
|
'upload_max_filesize',
|
|
'post_max_size'
|
|
);
|
|
|
|
foreach ($phpValueKeys as $key) {
|
|
$pattern = '/php_value ' . $key . ' (\S)*/';
|
|
$setting = 'php_value ' . $key . ' ' . $size;
|
|
$hasReplaced = 0;
|
|
$content = preg_replace($pattern, $setting, $htaccess, 1, $hasReplaced);
|
|
if ($content !== null) {
|
|
$htaccess = $content;
|
|
}
|
|
if ($hasReplaced == 0) {
|
|
$htaccess .= "\n" . $setting;
|
|
}
|
|
}
|
|
|
|
//check for write permissions
|
|
if (is_writable(OC::$SERVERROOT . '/.htaccess')) {
|
|
file_put_contents(OC::$SERVERROOT . '/.htaccess', $htaccess);
|
|
return OC_Helper::computerFileSize($size);
|
|
} else {
|
|
OC_Log::write('files', 'Can\'t write upload limit to ' . OC::$SERVERROOT . '/.htaccess. Please check the file permissions', OC_Log::WARN);
|
|
}
|
|
|
|
return false;
|
|
}
|
|
}
|