private static function checkUpdate($id)
{
$cacheItem = Cache::getById($id);
if (is_null($cacheItem)) {
return;
}
list($storageId, $internalPath) = $cacheItem;
$mounts = Filesystem::getMountByStorageId($storageId);
if (count($mounts) === 0) {
//if the storage we need isn't mounted on default, try to find a user that has access to the storage
$permissionsCache = new Permissions($storageId);
$users = $permissionsCache->getUsers($id);
if (count($users) === 0) {
return;
}
Filesystem::initMountPoints($users[0]);
$mounts = Filesystem::getMountByStorageId($storageId);
if (count($mounts) === 0) {
return;
}
}
$storage = $mounts[0]->getStorage();
$watcher = new Watcher($storage);
$watcher->checkUpdate($internalPath);
}
/**
* scan a single file and store it in the cache
*
* @param string $file
* @param int $reuseExisting
* @param bool $parentExistsInCache
* @return array with metadata of the scanned file
*/
public function scanFile($file, $reuseExisting = 0, $parentExistsInCache = false)
{
if (!self::isPartialFile($file) and !Filesystem::isFileBlacklisted($file)) {
$this->emit('\\OC\\Files\\Cache\\Scanner', 'scanFile', array($file, $this->storageId));
\OC_Hook::emit('\\OC\\Files\\Cache\\Scanner', 'scan_file', array('path' => $file, 'storage' => $this->storageId));
$data = $this->getData($file);
if ($data) {
if ($file and !$parentExistsInCache) {
$parent = dirname($file);
if ($parent === '.' or $parent === '/') {
$parent = '';
}
if (!$this->cache->inCache($parent)) {
$this->scanFile($parent);
}
}
$newData = $data;
$cacheData = $this->cache->get($file);
if ($cacheData) {
if (isset($cacheData['fileid'])) {
$this->permissionsCache->remove($cacheData['fileid']);
}
if ($reuseExisting) {
// prevent empty etag
$etag = $cacheData['etag'];
$propagateETagChange = false;
if (empty($etag)) {
$etag = $data['etag'];
$propagateETagChange = true;
}
// only reuse data if the file hasn't explicitly changed
if (isset($data['mtime']) && isset($cacheData['mtime']) && $data['mtime'] === $cacheData['mtime']) {
if ($reuseExisting & self::REUSE_SIZE && $data['size'] === -1) {
$data['size'] = $cacheData['size'];
}
if ($reuseExisting & self::REUSE_ETAG) {
$data['etag'] = $etag;
if ($propagateETagChange) {
$parent = $file;
while ($parent !== '') {
$parent = dirname($parent);
if ($parent === '.') {
$parent = '';
}
$parentCacheData = $this->cache->get($parent);
$this->cache->update($parentCacheData['fileid'], array('etag' => $this->storage->getETag($parent)));
}
}
}
}
// Only update metadata that has changed
$newData = array_diff_assoc($data, $cacheData);
if (isset($newData['etag'])) {
$cacheDataString = print_r($cacheData, true);
$dataString = print_r($data, true);
\OCP\Util::writeLog('OC\\Files\\Cache\\Scanner', "!!! No reuse of etag for '{$file}' !!! \ncache: {$cacheDataString} \ndata: {$dataString}", \OCP\Util::DEBUG);
}
}
}
if (!empty($newData)) {
$this->cache->put($file, $newData);
$this->emit('\\OC\\Files\\Cache\\Scanner', 'postScanFile', array($file, $this->storageId));
\OC_Hook::emit('\\OC\\Files\\Cache\\Scanner', 'post_scan_file', array('path' => $file, 'storage' => $this->storageId));
}
} else {
$this->cache->remove($file);
}
return $data;
}
return null;
}
/**
* scan a single file and store it in the cache
*
* @param string $file
* @param int $reuseExisting
* @return array an array of metadata of the scanned file
*/
public function scanFile($file, $reuseExisting = 0)
{
if (!self::isPartialFile($file) and !Filesystem::isFileBlacklisted($file)) {
$this->emit('\\OC\\Files\\Cache\\Scanner', 'scanFile', array($file, $this->storageId));
\OC_Hook::emit('\\OC\\Files\\Cache\\Scanner', 'scan_file', array('path' => $file, 'storage' => $this->storageId));
$data = $this->getData($file);
if ($data) {
$parent = dirname($file);
if ($parent === '.' or $parent === '/') {
$parent = '';
}
$parentId = $this->cache->getId($parent);
// scan the parent if it's not in the cache (id -1) and the current file is not the root folder
if ($file and $parentId === -1) {
$parentData = $this->scanFile($parent);
$parentId = $parentData['fileid'];
}
if ($parent) {
$data['parent'] = $parentId;
}
$cacheData = $this->cache->get($file);
if ($cacheData and isset($cacheData['fileid'])) {
$this->permissionsCache->remove($cacheData['fileid']);
}
if ($cacheData and $reuseExisting) {
// prevent empty etag
if (empty($cacheData['etag'])) {
$etag = $data['etag'];
} else {
$etag = $cacheData['etag'];
}
// only reuse data if the file hasn't explicitly changed
if (isset($data['storage_mtime']) && isset($cacheData['storage_mtime']) && $data['storage_mtime'] === $cacheData['storage_mtime']) {
$data['mtime'] = $cacheData['mtime'];
if ($reuseExisting & self::REUSE_SIZE && $data['size'] === -1) {
$data['size'] = $cacheData['size'];
}
if ($reuseExisting & self::REUSE_ETAG) {
$data['etag'] = $etag;
}
}
// Only update metadata that has changed
$newData = array_diff_assoc($data, $cacheData);
if (isset($newData['etag'])) {
$cacheDataString = print_r($cacheData, true);
$dataString = print_r($data, true);
\OCP\Util::writeLog('OC\\Files\\Cache\\Scanner', "!!! No reuse of etag for '{$file}' !!! \ncache: {$cacheDataString} \ndata: {$dataString}", \OCP\Util::DEBUG);
}
} else {
$newData = $data;
}
if (!empty($newData)) {
$data['fileid'] = $this->addToCache($file, $newData);
$this->emit('\\OC\\Files\\Cache\\Scanner', 'postScanFile', array($file, $this->storageId));
\OC_Hook::emit('\\OC\\Files\\Cache\\Scanner', 'post_scan_file', array('path' => $file, 'storage' => $this->storageId));
}
} else {
$this->removeFromCache($file);
}
return $data;
}
return null;
}
