下载
<?
//====================================================
// FileName:download.class.php
// Summary: 文件下载类
// Author: feifengxlq
// Email:feifengxlqsohu.com
// CreateTime: 2005-7-19
// LastModifed:
// copyright (c)2005 xlq.100steps.net feifengxlqsohu.com
// 使用范例：
// $download=new download('php,exe,html',false);
// if(!$download->downloadfile($filename))
// {
// echo $download->geterrormsg();
// }
//====================================================
class download{
var $debug=true;
var $errormsg='';
var $Filter=array();
var $filename='';
var $mineType='text/plain';
var $xlq_filetype=array();
function download($fileFilter='',$isdebug=true)
{
$this->setFilter($fileFilter);
$this->setdebug($isdebug);
$this->setfiletype();
}
function setFilter($fileFilter)
{
if(empty($fileFilter)) return ;
$this->Filter=(',',($fileFilter));
}
function setdebug($debug)
{
$this->debug=$debug;
}
function setfilename($filename)
{
$this->filename=$filename;
}
function downloadfile($filename)
{
$this->setfilename($filename);
if($this->filecheck())
{
$fn = ( ( '/', ( $this->filename, '\\', '/' ) ) );
( "Pragma: public" );
( "Expires: 0" ); // set expiration time
( "Cache-Component: must-revalidate, post-check=0, pre-check=0" );
( "Content-type:".$this->mineType );
( "Content-Length: " . ( $this->filename ) );
( "Content-Disposition: attachment; filename=\"$fn\"" );
( 'Content-Transfer-Encoding: binary' );
( $this->filename );
return true;
}else
{
return false;
}
}
function geterrormsg()
{
return $this->errormsg;
}
function filecheck()
{
$filename=$this->filename;
if(($filename))
{
$filetype=((('.',$filename)));
if(($filetype,$this->Filter))
{
$this->errormsg.=$filename.'不允许下载！';
if($this->debug) exit($filename.'不允许下载！') ;
return false;
}else
{
if ( ( "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
{
$this->errormsg.='获取'.$filename.'文件类型时候发生错误，或者不存在预定文件类型内';
if($this->debug) exit('获取文件类型出错');
return false;
}
}
}else
{
$this->errormsg.=$filename.'不存在!';
if($this->debug) exit($filename.'不存在!') ;
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']="javascript/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']="application/x-cpio";
$this->xlq_filetype['gtar']="application/x-gtar";
$this->xlq_filetype['shar']="application/x-shar";
$this->xlq_filetype['sv4cpio']="application/x-sv4cpio";
$this->xlq_filetype['sv4crc']="application/x-sv4crc";
$this->xlq_filetype['tar']="application/x-tar";
$this->xlq_filetype['ustar']="application/x-ustar";
$this->xlq_filetype['man']="application/x-troff-man";
$this->xlq_filetype['sh']="application/x-sh";
$this->xlq_filetype['tcl']="application/x-tcl";
$this->xlq_filetype['tex']="application/x-tex";
$this->xlq_filetype['texi']="application/x-texinfo";
, ;$this->xlq_filetype['texinfo']="application/x-texinfo";
$this->xlq_filetype['t']="application/x-troff";
$this->xlq_filetype['tr']="application/x-troff";
$this->xlq_filetype['roff']="application/x-troff";
$this->xlq_filetype['shar']="application/x-shar";
$this->xlq_filetype['me']="application/x-troll-me";
$this->xlq_filetype['ts']="application/x-troll-ts";
$this->xlq_filetype['gif']="image/gif";
$this->xlq_filetype['jpeg']="image/pjpeg";
$this->xlq_filetype['jpg']="image/pjpeg";
$this->xlq_filetype['jpe']="image/pjpeg";
$this->xlq_filetype['ras']="image/x-cmu-raster";
$this->xlq_filetype['pbm']="image/x-portable-bitmap";
$this->xlq_filetype['ppm']="image/x-portable-pixmap";
$this->xlq_filetype['xbm']="image/x-xbitmap";
$this->xlq_filetype['xwd']="image/x-xwindowdump";
$this->xlq_filetype['ief']="image/ief";
$this->xlq_filetype['tif']="image/tiff";
$this->xlq_filetype['tiff']="image/tiff";
$this->xlq_filetype['pnm']="image/x-portable-anymap";
$this->xlq_filetype['pgm']="image/x-portable-graymap";
$this->xlq_filetype['rgb']="image/x-rgb";
$this->xlq_filetype['xpm']="image/x-xpixmap";
$this->xlq_filetype['txt']="text/plain";
$this->xlq_filetype['c']="text/plain";
$this->xlq_filetype['cc']="text/plain";
$this->xlq_filetype['h']="text/plain";
$this->xlq_filetype['html']="text/html";
$this->xlq_filetype['htm']="text/html";
$this->xlq_filetype['htl']="text/html";
$this->xlq_filetype['rtx']="text/richtext";
$this->xlq_filetype['etx']="text/x-setext";
$this->xlq_filetype['tsv']="text/tab-separated-values";
$this->xlq_filetype['mpeg']="video/mpeg";
$this->xlq_filetype['mpg']="video/mpeg";
$this->xlq_filetype['mpe']="video/mpeg";
$this->xlq_filetype['avi']="video/x-msvideo";
$this->xlq_filetype['qt']="video/quicktime";
$this->xlq_filetype['mov']="video/quicktime";
$this->xlq_filetype['moov']="video/quicktime";
$this->xlq_filetype['movie']="video/x-sgi-movie";
$this->xlq_filetype['au']="audio/basic";
$this->xlq_filetype['snd']="audio/basic";
$this->xlq_filetype['wav']="audio/x-wav";
$this->xlq_filetype['aif']="audio/x-aiff";
$this->xlq_filetype['aiff']="audio/x-aiff";
$this->xlq_filetype['aifc']="audio/x-aiff";
$this->xlq_filetype['swf']="application/x-shockwave-flash";
}
}
?> 
