php下载类

源码:

<?//====================================================//                FileName:download.class.php//                Summary: 文件下载类//                Author: feifengxlq//      Email:[e-mail]//                CreateTime: 2005-7-19//                LastModifed://                copyright (c)2005 xlq.100steps.net  [email][e-mail][/email]//   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=''; var $xlq_filetype=array();

 function __construct($fileFilter='',$isdebug=true) {  $this->setFilter($fileFilter);  $this->setdebug($isdebug);  $this->setfiletype(); }

 function setFilter($fileFilter) {  if(empty($fileFilter)) return ;  $this->Filter=explode(',',strtolower($fileFilter)); } function setdebug($debug) {  $this->debug=$debug; }

 function setfilename($filename) {  $this->filename=$filename; }

 function downloadfile($filename) {  $this->setfilename($filename);  if($this->filecheck())  {      ini_set('memory_limit', '-1');   $fn = array_pop( explode( '/', strtr( $this->filename, '//', '/' ) ) );   header( "Pragma: public" );   header( "Expires: 0" ); // set expiration time   header( "Cache-Component: must-revalidate, post-check=0, pre-check=0" );   header('Content-Encoding: none');   header( "Content-type:".$this->mineType );   header( "Content-Length: " . filesize( $this->filename ) );   header( "Content-Disposition: attachment; filename=/"$fn/"" );   header( 'Content-Transfer-Encoding: binary' );   ob_clean();            flush();   readfile( $this->filename );   return true;  }else  {   return false;  } } function geterrormsg() {  return $this->errormsg; }

 function filecheck() {  $filename=$this->filename;  if(file_exists($filename))  {   $filetype=strtolower(array_pop(explode('.',$filename)));   if(in_array($filetype,$this->Filter))   {    $this->errormsg.=$filename.'不允许下载！';    if($this->debug) exit($filename.'不允许下载！') ;    return false;   }else   {    if ( 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    {     $this->errormsg.='获取'.$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/vnd.ms-word';  $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"; }}?>