namespace Tang\Util; use Tang\Exception\SystemException; use Tang\Services\FileService; use Tang\Storage\Drivers\IStorage; /** * 文件上传组件 * Class Upload * @package Tang\Util */ class Upload { /** * 允许上传的文件后缀 * @var array */ private $allowExts= array('jpg','jpeg','gif','png','bmp'); /** * 是否安全类型检查 * @var boolean */ private $allowSafeCheck = true; /** * 文件后缀名 * @var string */ private $ext = ''; /** * 上传最大大小 (K为单位 1M=1024K) * @var int */ private $maxSize = 1024; /** * 存储引擎 * @var IStorage */ protected $storage; /** * @param IStorage $storage 存储引擎 * @param int $maxSize 最大尺寸 * @param bool $allowSafeCheck 是否允许安全检查 * @param array $exts 允许上传的后缀 */ public function __construct(IStorage $storage,$maxSize = 0,$allowSafeCheck = true,array $exts=array()) { $this->setStorage($storage) ->setMaxSize($maxSize)->setAllowSafe($allowSafeCheck); if($exts) { $this->setAllowExts($exts); } } /** * 设置上传的最大KB * 为0的时候则设置为无限大小 * @param int $maxSize * @return $this */ public function setMaxSize($maxSize = 0) { $maxSize = (int)$maxSize; $this->maxSize = $maxSize > 0 ? $maxSize : 0; return $this; } /** * 设置允许上传的文件后缀数组 * @param array $exts * @return $this */ public function setAllowExts(array $exts) { $this->allowExts = $exts; return $this; } /** * 设置是否允许安全类型检查 * @param boolean $allowSafeCheck * @return $this */ public function setAllowSafe($allowSafeCheck = true) { $this->allowSafeCheck = $allowSafeCheck; return $this; } /** * 设置存储引擎 * @param IStorage $storage * @return $this */ public function setStorage(IStorage $storage) { $this->storage = $storage; return $this; } /** * 如果file控件里面类似于file[]这样的数组信息时候,如果需要用自己定义的地址的时候。 * $fileName则需要传递一个数组对应上传的文件 * @param string $filed 上传的字段名 file控件里面的name * @param mixed $fileName 生成的文件名 不填写的话为系统自动生成文件地址 * @return array * @throws NotFoundFileUploadException * @throws UploadErrorException * @throws UploadSafeCheckException */ public function move($filed,$fileName=null) { if(!isset($_FILES[$filed])) { throw new NotFoundFileUploadException($filed); } $uploadFile = $_FILES[$filed]; if(is_array($uploadFile['name'])) { $fileStructs = array(); if(!is_array($fileName)) { $fileName = array(); } foreach($uploadFile['name'] as $key => $value) { $fileStructs[$key] = $this->uploadHandle(array('name' => $value,'type' => $uploadFile['type'][$key],'tmp_name' => $uploadFile['tmp_name'][$key],'error' => $uploadFile['error'][$key],'size' => $uploadFile['size'][$key]),isset($fileName[$key]) && $fileName[$key] ? $fileName[$key]:''); } return $fileStructs; } else { return $this->uploadHandle($uploadFile,$fileName); } } private function uploadHandle($uploadFile,$fileName='') { if($uploadFile['error'] > 0) { throw new UploadErrorException('File upload error '.$uploadFile['error'],null,50001+$uploadFile['error']); } else if(!is_uploaded_file($uploadFile['tmp_name'])) { throw new UploadErrorException('Illegal file upload!',null,50010); } //判断后缀 $this->ext = FileService::getService()->getExtension($uploadFile['name']); if($this->allowExts && !in_array($this->ext, $this->allowExts)) { throw new UploadSafeCheckException('Only allowed to upload the [%s] file!',array(implode(',', $this->allowExts)),50001); } if($this->maxSize > 0) { $maxSize = 1024 * $this->maxSize; if($uploadFile['size'] > $maxSize ) { throw new UploadErrorException('Upload file size is [%d byte], is greater than the set of [%d byte]!',array($uploadFile['size'],$maxSize),50000); } } //安全类型检查 if($this->allowExts && in_array($this->ext, array('jpeg','jpg','gif','png','bmp')) && !$this->picScan($uploadFile['tmp_name'])) { throw new UploadSafeCheckException('The uploaded file is not a [%s] file!',array($this->ext),50011); } !$fileName && $fileName = $this->createFilePath(); $fileStruct = $this->storage->putFile($uploadFile['tmp_name'],$fileName); $fileStruct['name'] = $uploadFile['name']; return $fileStruct; } /** * 检查文件是否是一个图片 * @param string $fileName * @return boolean */ private function picScan($fileName) { $tempImageSize = @getimagesize($fileName); list($tempWidth, $tempHeight, $tempType) = (array)$tempImageSize; $tempSize = $tempWidth * $tempHeight; if($tempSize > 16777216 || $tempSize < 4 || empty($tempType) || strpos($tempImageSize['mime'], 'flash') > 0) { return false; } return true; } /** * 构建上传路径 */ private function createFilePath() { return date('ym/d/').sha1(uniqid(mt_rand(),1)).'.'.$this->ext; } }

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