php下载类

源码:

<? //==================================================== //                FileName:download.class.php //                Summary: 文件下载类 //                Author: feifengxlq //      Email:feifengxlq@sohu.com //                CreateTime: 2005-7-19 //                LastModifed: //                copyright (c)2005 xlq.100steps.net  [email]feifengxlq@sohu.com[/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";  } } ?>