462 lines
15 KiB
PHP
462 lines
15 KiB
PHP
<?php
|
|
/**
|
|
* Copyright (c) 2012 Frank Karlitschek <frank@owncloud.org>
|
|
* 2013 Bjoern Schiessle <schiessle@owncloud.com>
|
|
* This file is licensed under the Affero General Public License version 3 or
|
|
* later.
|
|
* See the COPYING-README file.
|
|
*/
|
|
|
|
/**
|
|
* Versions
|
|
*
|
|
* A class to handle the versioning of files.
|
|
*/
|
|
|
|
namespace OCA\Files_Versions;
|
|
|
|
class Storage {
|
|
|
|
const DEFAULTENABLED=true;
|
|
const DEFAULTMAXSIZE=50; // unit: percentage; 50% of available disk space/quota
|
|
|
|
private static $max_versions_per_interval = array(
|
|
//first 10sec, one version every 2sec
|
|
1 => array('intervalEndsAfter' => 10, 'step' => 2),
|
|
//next minute, one version every 10sec
|
|
2 => array('intervalEndsAfter' => 60, 'step' => 10),
|
|
//next hour, one version every minute
|
|
3 => array('intervalEndsAfter' => 3600, 'step' => 60),
|
|
//next 24h, one version every hour
|
|
4 => array('intervalEndsAfter' => 86400, 'step' => 3600),
|
|
//next 30days, one version per day
|
|
5 => array('intervalEndsAfter' => 2592000, 'step' => 86400),
|
|
//until the end one version per week
|
|
6 => array('intervalEndsAfter' => -1, 'step' => 604800),
|
|
);
|
|
|
|
public static function getUidAndFilename($filename) {
|
|
$uid = \OC\Files\Filesystem::getOwner($filename);
|
|
\OC\Files\Filesystem::initMountPoints($uid);
|
|
if ( $uid != \OCP\User::getUser() ) {
|
|
$info = \OC\Files\Filesystem::getFileInfo($filename);
|
|
$ownerView = new \OC\Files\View('/'.$uid.'/files');
|
|
$filename = $ownerView->getPath($info['fileid']);
|
|
}
|
|
return array($uid, $filename);
|
|
}
|
|
|
|
/**
|
|
* get current size of all versions from a given user
|
|
*
|
|
* @param $user user who owns the versions
|
|
* @return mixed versions size or false if no versions size is stored
|
|
*/
|
|
private static function getVersionsSize($user) {
|
|
$query = \OC_DB::prepare('SELECT size FROM *PREFIX*files_versions WHERE user=?');
|
|
$result = $query->execute(array($user))->fetchAll();
|
|
|
|
if ($result) {
|
|
return $result[0]['size'];
|
|
}
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* write to the database how much space is in use for versions
|
|
*
|
|
* @param $user owner of the versions
|
|
* @param $size size of the versions
|
|
*/
|
|
private static function setVersionsSize($user, $size) {
|
|
if ( self::getVersionsSize($user) === false) {
|
|
$query = \OC_DB::prepare('INSERT INTO *PREFIX*files_versions (size, user) VALUES (?, ?)');
|
|
}else {
|
|
$query = \OC_DB::prepare('UPDATE *PREFIX*files_versions SET size=? WHERE user=?');
|
|
}
|
|
$query->execute(array($size, $user));
|
|
}
|
|
|
|
/**
|
|
* store a new version of a file.
|
|
*/
|
|
public static function store($filename) {
|
|
if(\OCP\Config::getSystemValue('files_versions', Storage::DEFAULTENABLED)=='true') {
|
|
list($uid, $filename) = self::getUidAndFilename($filename);
|
|
|
|
$files_view = new \OC\Files\View('/'.$uid .'/files');
|
|
$users_view = new \OC\Files\View('/'.$uid);
|
|
|
|
// check if filename is a directory
|
|
if($files_view->is_dir($filename)) {
|
|
return false;
|
|
}
|
|
|
|
// we should have a source file to work with
|
|
if (!$files_view->file_exists($filename)) {
|
|
return false;
|
|
}
|
|
|
|
// create all parent folders
|
|
$info=pathinfo($filename);
|
|
$versionsFolderName=\OCP\Config::getSystemValue('datadirectory').$users_view->getAbsolutePath('files_versions/');
|
|
if(!file_exists($versionsFolderName.'/'.$info['dirname'])) {
|
|
mkdir($versionsFolderName.'/'.$info['dirname'], 0750, true);
|
|
}
|
|
|
|
// store a new version of a file
|
|
$users_view->copy('files'.$filename, 'files_versions'.$filename.'.v'.$users_view->filemtime('files'.$filename));
|
|
$versionsSize = self::getVersionsSize($uid);
|
|
if ( $versionsSize === false || $versionsSize < 0 ) {
|
|
$versionsSize = self::calculateSize($uid);
|
|
}
|
|
|
|
$versionsSize += $users_view->filesize('files'.$filename);
|
|
|
|
// expire old revisions if necessary
|
|
$newSize = self::expire($filename, $versionsSize);
|
|
|
|
if ( $newSize != $versionsSize ) {
|
|
self::setVersionsSize($uid, $newSize);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* Delete versions of a file
|
|
*/
|
|
public static function delete($filename) {
|
|
list($uid, $filename) = self::getUidAndFilename($filename);
|
|
$versions_fileview = new \OC\Files\View('/'.$uid .'/files_versions');
|
|
|
|
$abs_path = \OCP\Config::getSystemValue('datadirectory').$versions_fileview->getAbsolutePath('').$filename.'.v';
|
|
if( ($versions = self::getVersions($uid, $filename)) ) {
|
|
$versionsSize = self::getVersionsSize($uid);
|
|
if ( $versionsSize === false || $versionsSize < 0 ) {
|
|
$versionsSize = self::calculateSize($uid);
|
|
}
|
|
foreach ($versions as $v) {
|
|
unlink($abs_path . $v['version']);
|
|
$versionsSize -= $v['size'];
|
|
}
|
|
self::setVersionsSize($uid, $versionsSize);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* rename versions of a file
|
|
*/
|
|
public static function rename($oldpath, $newpath) {
|
|
list($uid, $oldpath) = self::getUidAndFilename($oldpath);
|
|
list($uidn, $newpath) = self::getUidAndFilename($newpath);
|
|
$versions_view = new \OC\Files\View('/'.$uid .'/files_versions');
|
|
$files_view = new \OC\Files\View('/'.$uid .'/files');
|
|
$abs_newpath = \OCP\Config::getSystemValue('datadirectory').$versions_view->getAbsolutePath('').$newpath;
|
|
|
|
if ( $files_view->is_dir($oldpath) && $versions_view->is_dir($oldpath) ) {
|
|
$versions_view->rename($oldpath, $newpath);
|
|
} else if ( ($versions = Storage::getVersions($uid, $oldpath)) ) {
|
|
$info=pathinfo($abs_newpath);
|
|
if(!file_exists($info['dirname'])) mkdir($info['dirname'], 0750, true);
|
|
foreach ($versions as $v) {
|
|
$versions_view->rename($oldpath.'.v'.$v['version'], $newpath.'.v'.$v['version']);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* rollback to an old version of a file.
|
|
*/
|
|
public static function rollback($filename, $revision) {
|
|
|
|
if(\OCP\Config::getSystemValue('files_versions', Storage::DEFAULTENABLED)=='true') {
|
|
list($uid, $filename) = self::getUidAndFilename($filename);
|
|
$users_view = new \OC\Files\View('/'.$uid);
|
|
$versionCreated = false;
|
|
|
|
//first create a new version
|
|
$version = 'files_versions'.$filename.'.v'.$users_view->filemtime('files'.$filename);
|
|
if ( !$users_view->file_exists($version)) {
|
|
$users_view->copy('files'.$filename, 'files_versions'.$filename.'.v'.$users_view->filemtime('files'.$filename));
|
|
$versionCreated = true;
|
|
}
|
|
|
|
// rollback
|
|
if( @$users_view->copy('files_versions'.$filename.'.v'.$revision, 'files'.$filename) ) {
|
|
$users_view->touch('files'.$filename, $revision);
|
|
Storage::expire($filename);
|
|
return true;
|
|
|
|
}else if ( $versionCreated ) {
|
|
$users_view->unlink($version);
|
|
}
|
|
}
|
|
return false;
|
|
|
|
}
|
|
|
|
|
|
/**
|
|
* @brief get a list of all available versions of a file in descending chronological order
|
|
* @param $uid user id from the owner of the file
|
|
* @param $filename file to find versions of, relative to the user files dir
|
|
* @param $count number of versions to return
|
|
* @returns array
|
|
*/
|
|
public static function getVersions($uid, $filename, $count = 0 ) {
|
|
if( \OCP\Config::getSystemValue('files_versions', Storage::DEFAULTENABLED)=='true' ) {
|
|
$versions_fileview = new \OC\Files\View('/' . $uid . '/files_versions');
|
|
|
|
$versionsName = \OC_Filesystem::normalizePath(\OCP\Config::getSystemValue('datadirectory').$versions_fileview->getAbsolutePath($filename));
|
|
$versions = array();
|
|
// fetch for old versions
|
|
$matches = glob(preg_quote($versionsName).'.v*' );
|
|
|
|
if ( !$matches ) {
|
|
return $versions;
|
|
}
|
|
|
|
sort( $matches );
|
|
|
|
$files_view = new \OC\Files\View('/'.$uid.'/files');
|
|
$local_file = $files_view->getLocalFile($filename);
|
|
$local_file_md5 = \md5_file( $local_file );
|
|
|
|
foreach( $matches as $ma ) {
|
|
$parts = explode( '.v', $ma );
|
|
$version = ( end( $parts ) );
|
|
$key = $version.'#'.$filename;
|
|
$versions[$key]['cur'] = 0;
|
|
$versions[$key]['version'] = $version;
|
|
$versions[$key]['path'] = $filename;
|
|
$versions[$key]['size'] = $versions_fileview->filesize($filename.'.v'.$version);
|
|
|
|
// if file with modified date exists, flag it in array as currently enabled version
|
|
( \md5_file( $ma ) == $local_file_md5 ? $versions[$key]['fileMatch'] = 1 : $versions[$key]['fileMatch'] = 0 );
|
|
|
|
}
|
|
|
|
$versions = array_reverse( $versions );
|
|
|
|
foreach( $versions as $key => $value ) {
|
|
// flag the first matched file in array (which will have latest modification date) as current version
|
|
if ( $value['fileMatch'] ) {
|
|
$value['cur'] = 1;
|
|
break;
|
|
}
|
|
}
|
|
|
|
$versions = array_reverse( $versions );
|
|
|
|
// only show the newest commits
|
|
if( $count != 0 and ( count( $versions )>$count ) ) {
|
|
$versions = array_slice( $versions, count( $versions ) - $count );
|
|
}
|
|
|
|
return( $versions );
|
|
|
|
} else {
|
|
// if versioning isn't enabled then return an empty array
|
|
return( array() );
|
|
}
|
|
|
|
}
|
|
|
|
/**
|
|
* @brief get the size of all stored versions from a given user
|
|
* @param $uid id from the user
|
|
* @return size of vesions
|
|
*/
|
|
private static function calculateSize($uid) {
|
|
if( \OCP\Config::getSystemValue('files_versions', Storage::DEFAULTENABLED)=='true' ) {
|
|
$versions_fileview = new \OC\Files\View('/'.$uid.'/files_versions');
|
|
$versionsRoot = \OCP\Config::getSystemValue('datadirectory').$versions_fileview->getAbsolutePath('');
|
|
|
|
$iterator = new \RecursiveIteratorIterator(
|
|
new \RecursiveDirectoryIterator($versionsRoot),
|
|
\RecursiveIteratorIterator::CHILD_FIRST
|
|
);
|
|
|
|
$size = 0;
|
|
|
|
foreach ($iterator as $path) {
|
|
if ( preg_match('/^.+\.v(\d+)$/', $path, $match) ) {
|
|
$relpath = substr($path, strlen($versionsRoot)-1);
|
|
$size += $versions_fileview->filesize($relpath);
|
|
}
|
|
}
|
|
|
|
return $size;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @brief returns all stored file versions from a given user
|
|
* @param $uid id to the user
|
|
* @return array with contains two arrays 'all' which contains all versions sorted by age and 'by_file' which contains all versions sorted by filename
|
|
*/
|
|
private static function getAllVersions($uid) {
|
|
if( \OCP\Config::getSystemValue('files_versions', Storage::DEFAULTENABLED)=='true' ) {
|
|
$versions_fileview = new \OC\Files\View('/'.$uid.'/files_versions');
|
|
$versionsRoot = \OCP\Config::getSystemValue('datadirectory').$versions_fileview->getAbsolutePath('');
|
|
|
|
$iterator = new \RecursiveIteratorIterator(
|
|
new \RecursiveDirectoryIterator($versionsRoot),
|
|
\RecursiveIteratorIterator::CHILD_FIRST
|
|
);
|
|
|
|
$versions = array();
|
|
|
|
foreach ($iterator as $path) {
|
|
if ( preg_match('/^.+\.v(\d+)$/', $path, $match) ) {
|
|
$relpath = substr($path, strlen($versionsRoot)-1);
|
|
$versions[$match[1].'#'.$relpath] = array('path' => $relpath, 'timestamp' => $match[1]);
|
|
}
|
|
}
|
|
|
|
ksort($versions);
|
|
|
|
$i = 0;
|
|
|
|
$result = array();
|
|
|
|
foreach( $versions as $key => $value ) {
|
|
$i++;
|
|
$size = $versions_fileview->filesize($value['path']);
|
|
$filename = substr($value['path'], 0, -strlen($value['timestamp'])-2);
|
|
|
|
$result['all'][$key]['version'] = $value['timestamp'];
|
|
$result['all'][$key]['path'] = $filename;
|
|
$result['all'][$key]['size'] = $size;
|
|
|
|
$filename = substr($value['path'], 0, -strlen($value['timestamp'])-2);
|
|
$result['by_file'][$filename][$key]['version'] = $value['timestamp'];
|
|
$result['by_file'][$filename][$key]['path'] = $filename;
|
|
$result['by_file'][$filename][$key]['size'] = $size;
|
|
|
|
}
|
|
|
|
return $result;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @brief Erase a file's versions which exceed the set quota
|
|
*/
|
|
private static function expire($filename, $versionsSize = null) {
|
|
if(\OCP\Config::getSystemValue('files_versions', Storage::DEFAULTENABLED)=='true') {
|
|
list($uid, $filename) = self::getUidAndFilename($filename);
|
|
$versions_fileview = new \OC\Files\View('/'.$uid.'/files_versions');
|
|
|
|
// get available disk space for user
|
|
$quota = \OC_Preferences::getValue($uid, 'files', 'quota');
|
|
if ( $quota === null ) {
|
|
$quota = \OC_Appconfig::getValue('files', 'default_quota');
|
|
}
|
|
if ( $quota === null ) {
|
|
$quota = \OC\Files\Filesystem::free_space('/') / count(\OCP\User::getUsers());
|
|
} else {
|
|
$quota = \OCP\Util::computerFileSize($quota);
|
|
}
|
|
|
|
// make sure that we have the current size of the version history
|
|
if ( $versionsSize === null ) {
|
|
$versionsSize = self::getVersionsSize($uid);
|
|
if ( $versionsSize === false || $versionsSize < 0 ) {
|
|
$versionsSize = self::calculateSize($uid);
|
|
}
|
|
}
|
|
|
|
// calculate available space for version history
|
|
$files_view = new \OC\Files\View('/'.$uid.'/files');
|
|
$rootInfo = $files_view->getFileInfo('/');
|
|
$free = $quota-$rootInfo['size']; // remaining free space for user
|
|
if ( $free > 0 ) {
|
|
$availableSpace = ($free * self::DEFAULTMAXSIZE / 100) - $versionsSize; // how much space can be used for versions
|
|
} else {
|
|
$availableSpace = $free-$versionsSize;
|
|
}
|
|
|
|
// after every 1000s run reduce the number of all versions not only for the current file
|
|
$random = rand(0, 1000);
|
|
if ($random == 0) {
|
|
$result = Storage::getAllVersions($uid);
|
|
$versions_by_file = $result['by_file'];
|
|
$all_versions = $result['all'];
|
|
} else {
|
|
$all_versions = Storage::getVersions($uid, $filename);
|
|
$versions_by_file[$filename] = $all_versions;
|
|
}
|
|
|
|
$time = time();
|
|
|
|
// it is possible to expire versions from more than one file
|
|
// iterate through all given files
|
|
foreach ($versions_by_file as $filename => $versions) {
|
|
$versions = array_reverse($versions); // newest version first
|
|
|
|
$interval = 1;
|
|
$step = Storage::$max_versions_per_interval[$interval]['step'];
|
|
if (Storage::$max_versions_per_interval[$interval]['intervalEndsAfter'] == -1) {
|
|
$nextInterval = -1;
|
|
} else {
|
|
$nextInterval = $time - Storage::$max_versions_per_interval[$interval]['intervalEndsAfter'];
|
|
}
|
|
|
|
$firstVersion = reset($versions);
|
|
$firstKey = key($versions);
|
|
$prevTimestamp = $firstVersion['version'];
|
|
$nextVersion = $firstVersion['version'] - $step;
|
|
$remaining_versions[$firstKey] = $firstVersion;
|
|
unset($versions[$firstKey]);
|
|
|
|
foreach ($versions as $key => $version) {
|
|
$newInterval = true;
|
|
while ( $newInterval ) {
|
|
if ( $nextInterval == -1 || $version['version'] >= $nextInterval ) {
|
|
if ( $version['version'] > $nextVersion ) {
|
|
//distance between two version too small, delete version
|
|
$versions_fileview->unlink($version['path'].'.v'.$version['version']);
|
|
$availableSpace += $version['size'];
|
|
$versionsSize -= $version['size'];
|
|
unset($all_versions[$key]); // update array with all versions
|
|
} else {
|
|
$nextVersion = $version['version'] - $step;
|
|
}
|
|
$newInterval = false; // version checked so we can move to the next one
|
|
} else { // time to move on to the next interval
|
|
$interval++;
|
|
$step = Storage::$max_versions_per_interval[$interval]['step'];
|
|
$nextVersion = $prevTimestamp - $step;
|
|
if ( Storage::$max_versions_per_interval[$interval]['intervalEndsAfter'] == -1 ) {
|
|
$nextInterval = -1;
|
|
} else {
|
|
$nextInterval = $time - Storage::$max_versions_per_interval[$interval]['intervalEndsAfter'];
|
|
}
|
|
$newInterval = true; // we changed the interval -> check same version with new interval
|
|
}
|
|
}
|
|
$prevTimestamp = $version['version'];
|
|
}
|
|
}
|
|
|
|
// check if enough space is available after versions are rearranged.
|
|
// if not we delete the oldest versions until we meet the size limit for versions
|
|
$numOfVersions = count($all_versions);
|
|
$i = 0;
|
|
while ($availableSpace < 0) {
|
|
if ($i = $numOfVersions-2) break; // keep at least the last version
|
|
$versions_fileview->unlink($all_versions[$i]['path'].'.v'.$all_versions[$i]['version']);
|
|
$versionsSize -= $all_versions[$i]['size'];
|
|
$availableSpace += $all_versions[$i]['size'];
|
|
$i++;
|
|
}
|
|
|
|
return $versionsSize; // finally return the new size of the version history
|
|
}
|
|
|
|
return false;
|
|
}
|
|
}
|