PHP Cache::loadMimetypes方法代碼示例

 /**
  * scan all the files and folders in a folder
  *
  * @param string $path
  * @param bool $recursive
  * @param int $reuse
  * @return int the size of the scanned folder or -1 if the size is unknown at this stage
  */
 public function scanChildren($path, $recursive = self::SCAN_RECURSIVE, $reuse = -1)
 {
     if ($reuse === -1) {
         $reuse = $recursive === self::SCAN_SHALLOW ? self::REUSE_ETAG | self::REUSE_SIZE : 0;
     }
     $this->emit('\\OC\\Files\\Cache\\Scanner', 'scanFolder', array($path, $this->storageId));
     $size = 0;
     $childQueue = array();
     $existingChildren = array();
     if ($this->cache->inCache($path)) {
         $children = $this->cache->getFolderContents($path);
         foreach ($children as $child) {
             $existingChildren[] = $child['name'];
         }
     }
     $newChildren = array();
     if ($this->storage->is_dir($path) && ($dh = $this->storage->opendir($path))) {
         $exceptionOccurred = false;
         \OC_DB::beginTransaction();
         if (is_resource($dh)) {
             while (($file = readdir($dh)) !== false) {
                 $child = $path ? $path . '/' . $file : $file;
                 if (!Filesystem::isIgnoredDir($file)) {
                     $newChildren[] = $file;
                     try {
                         $data = $this->scanFile($child, $reuse, true);
                         if ($data) {
                             if ($data['size'] === -1) {
                                 if ($recursive === self::SCAN_RECURSIVE) {
                                     $childQueue[] = $child;
                                 } else {
                                     $size = -1;
                                 }
                             } else {
                                 if ($size !== -1) {
                                     $size += $data['size'];
                                 }
                             }
                         }
                     } catch (\Doctrine\DBAL\DBALException $ex) {
                         // might happen if inserting duplicate while a scanning
                         // process is running in parallel
                         // log and ignore
                         \OC_Log::write('core', 'Exception while scanning file "' . $child . '": ' . $ex->getMessage(), \OC_Log::DEBUG);
                         $exceptionOccurred = true;
                     }
                 }
             }
         }
         $removedChildren = \array_diff($existingChildren, $newChildren);
         foreach ($removedChildren as $childName) {
             $child = $path ? $path . '/' . $childName : $childName;
             $this->cache->remove($child);
         }
         \OC_DB::commit();
         if ($exceptionOccurred) {
             // It might happen that the parallel scan process has already
             // inserted mimetypes but those weren't available yet inside the transaction
             // To make sure to have the updated mime types in such cases,
             // we reload them here
             $this->cache->loadMimetypes();
         }
         foreach ($childQueue as $child) {
             $childSize = $this->scanChildren($child, self::SCAN_RECURSIVE, $reuse);
             if ($childSize === -1) {
                 $size = -1;
             } else {
                 $size += $childSize;
             }
         }
         $this->cache->put($path, array('size' => $size));
     }
     $this->emit('\\OC\\Files\\Cache\\Scanner', 'postScanFolder', array($path, $this->storageId));
     return $size;
 }

 /**
  * scan all the files and folders in a folder
  *
  * @param string $path
  * @param bool $recursive
  * @param int $reuse
  * @param array $folderData existing cache data for the folder to be scanned
  * @param bool $lock set to false to disable getting an additional read lock during scanning
  * @return int the size of the scanned folder or -1 if the size is unknown at this stage
  */
 protected function scanChildren($path, $recursive = self::SCAN_RECURSIVE, $reuse = -1, $folderData = null, $lock = true)
 {
     if ($reuse === -1) {
         $reuse = $recursive === self::SCAN_SHALLOW ? self::REUSE_ETAG | self::REUSE_SIZE : self::REUSE_ETAG;
     }
     $this->emit('\\OC\\Files\\Cache\\Scanner', 'scanFolder', array($path, $this->storageId));
     $size = 0;
     $childQueue = array();
     if (is_array($folderData) and isset($folderData['fileid'])) {
         $folderId = $folderData['fileid'];
     } else {
         $folderId = $this->cache->getId($path);
     }
     $existingChildren = $this->getExistingChildren($folderId);
     $newChildren = $this->getNewChildren($path);
     if ($this->useTransactions) {
         \OC_DB::beginTransaction();
     }
     $exceptionOccurred = false;
     foreach ($newChildren as $file) {
         $child = $path ? $path . '/' . $file : $file;
         try {
             $existingData = isset($existingChildren[$file]) ? $existingChildren[$file] : null;
             $data = $this->scanFile($child, $reuse, $folderId, $existingData, $lock);
             if ($data) {
                 if ($data['mimetype'] === 'httpd/unix-directory' and $recursive === self::SCAN_RECURSIVE) {
                     $childQueue[$child] = $data;
                 } else {
                     if ($data['size'] === -1) {
                         $size = -1;
                     } else {
                         if ($size !== -1) {
                             $size += $data['size'];
                         }
                     }
                 }
             }
         } catch (\Doctrine\DBAL\DBALException $ex) {
             // might happen if inserting duplicate while a scanning
             // process is running in parallel
             // log and ignore
             \OC_Log::write('core', 'Exception while scanning file "' . $child . '": ' . $ex->getMessage(), \OC_Log::DEBUG);
             $exceptionOccurred = true;
         } catch (\OCP\Lock\LockedException $e) {
             if ($this->useTransactions) {
                 \OC_DB::rollback();
             }
             throw $e;
         }
     }
     $removedChildren = \array_diff(array_keys($existingChildren), $newChildren);
     foreach ($removedChildren as $childName) {
         $child = $path ? $path . '/' . $childName : $childName;
         $this->removeFromCache($child);
     }
     if ($this->useTransactions) {
         \OC_DB::commit();
     }
     if ($exceptionOccurred) {
         // It might happen that the parallel scan process has already
         // inserted mimetypes but those weren't available yet inside the transaction
         // To make sure to have the updated mime types in such cases,
         // we reload them here
         $this->cache->loadMimetypes();
     }
     foreach ($childQueue as $child => $childData) {
         $childSize = $this->scanChildren($child, self::SCAN_RECURSIVE, $reuse, $childData, $lock);
         if ($childSize === -1) {
             $size = -1;
         } else {
             if ($size !== -1) {
                 $size += $childSize;
             }
         }
     }
     if (!is_array($folderData) or !isset($folderData['size']) or $folderData['size'] !== $size) {
         $this->updateCache($path, array('size' => $size), $folderId);
     }
     $this->emit('\\OC\\Files\\Cache\\Scanner', 'postScanFolder', array($path, $this->storageId));
     return $size;
 }