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"; } } ?>