<?php
	/**
	 * file download class
	 * Create Time:06/23/2009
	 * Author:DAKER.W
	 * QQ:451021477
	
	 */
	class Download{
		private $debug			= false;
		private $errorMsg		= '';	
		private $filter			= array();
		private $fileName		= '';
		private $mineType		= '';
		private $xlq_filetype	= array();
		private $limitTime		= 60;
		/**
		 * @param string $fileFilter 
		 * @param boolean $isDebug
		 */
		function __construct($fileFilter='', $isDebug=true)
		{
			$this->setFilter($fileFilter);
			$this->setDebug($isDebug);
			$this->setFileType();
		}
		
		function downloadfile($filename)
		{
			$this->fileName		= $filename;
			if($this->filecheck()){
				$fn				= basename($this->fileName);
				ob_end_clean();
				@set_time_limit($this->limitTime);
				header('Cache-control: max-age=31536000');
				header('Expires: '.gmdate('D, d M Y H:i:s',time()+31536000).' GMT');
				header('Content-Encoding: none');
				header('Content-Length: '.filesize($this->fileName));
				header('Content-Disposition: attachment; filename='.$fn);
				header('Content-Type: '.$this->mineType);
				readfile($this->fileName);
				return true;
			}else{
				return false;
			}
		}
		
		function filecheck()
		{
			$fileName		= $this->fileName;
			if(file_exists($fileName)){
				$fileType	= strtolower(array_pop(explode(".", $fileName)));
				if(!in_array($fileType, $this->filter)){
					$this->errorMsg	.= sprintf("%s can't download!", $fileName);
					if($this->debug)exit(sprintf("%s can't download!", $fileName));
					return false;
				}else {
					if(function_exists("mime_content_type")){
						$this->mineType		= mime_content_type($fileName);
					}
					
					if(empty($this->mineType)){
						if(isset($this->xlq_filetype[$fileType])){
							$this->mineType		= $this->xlq_filetype[$fileType];
						}
					}
					
					if(!empty($this->mineType)){
						return true;
					}else {
						$this->errorMsg			.= "Can't get file type!";
						if($this->debug)exit("Can't get file type!");
						return false;													
					}
				}				
			}else {
				$this->errorMsg				.= sprintf("%s isn't exists!", $fileName);
				if($this->debug)exit(sprintf("%s isn't exists!", $fileName));
				return false;				
			}
		}

		function setFileType()
		{
		    $this->xlq_filetype['chm']='application/octet-stream';
		    $this->xlq_filetype['ppt']='application/vnd.ms-powerpoint';
		    $this->xlq_filetype['xls']='application/vnd.ms-excel';
		    $this->xlq_filetype['doc']='application/msword';
		    $this->xlq_filetype['exe']='application/octet-stream';
		    $this->xlq_filetype['rar']='application/octet-stream';
		    $this->xlq_filetype['js']="javascrīpt/js";
		    $this->xlq_filetype['css']="text/css";
		    $this->xlq_filetype['hqx']="application/mac-binhex40";
		    $this->xlq_filetype['bin']="application/octet-stream";
		    $this->xlq_filetype['oda']="application/oda";
		    $this->xlq_filetype['pdf']="application/pdf";
		    $this->xlq_filetype['ai']="application/postsrcipt";
		    $this->xlq_filetype['eps']="application/postsrcipt";
		    $this->xlq_filetype['es']="application/postsrcipt";
		    $this->xlq_filetype['rtf']="application/rtf";
		    $this->xlq_filetype['mif']="application/x-mif";
		    $this->xlq_filetype['csh']="application/x-csh";
		    $this->xlq_filetype['dvi']="application/x-dvi";
		    $this->xlq_filetype['hdf']="application/x-hdf";
		    $this->xlq_filetype['nc']="application/x-netcdf";
		    $this->xlq_filetype['cdf']="application/x-netcdf";
		    $this->xlq_filetype['latex']="application/x-latex";
		    $this->xlq_filetype['ts']="application/x-troll-ts";
		    $this->xlq_filetype['src']="application/x-wais-source";
		    $this->xlq_filetype['zip']="application/zip";
		    $this->xlq_filetype['bcpio']="application/x-bcpio";
		    $this->xlq_filetype['cpio']=