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【PHP】 tangframework 上传类
作者:灏明 / 发布于2014/12/10/ 473

	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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