<?php if (!defined('BASEPATH')) exit('No direct script access allowed');
/* $download = new download('php,exe,html',false);
$this->load->library('Download');
if(!$this->download->->downloadfile($filename))
{
echo $this->download->geterrormsg();
}
*/
class Download
{
var $debug=true;
var $errormsg='';
var $Filter=array();
var $filename='';
var $_realname = '';
var $mineType='text/plain';
var $filetype ='';
var $xlq_filetype=array();
protected $CI = NULL;
function __construct($fileFilter='',$isdebug=false)
{
$this->CI = &get_instance();
$this->setFilter($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($filename,$_realname)
{
$this->filename = mb_convert_encoding(trim($filename),"Big5");
$this->_realname = empty($_realname) ? $this->filename : $_realname;
}
function downloadfile($filename,$_realname='',$schdule=false)
{
$this->setfilename($filename,$_realname);
if($this->filecheck($schdule))
{
//重新設置文件名稱 edited by zcs
$fn = !empty($_realname) ? $this->trim_special_str($_realname) : array_pop( explode( '/', strtr( $this->filename, '\\', '/' ) ) );
if(!empty($_realname) && strtolower(array_pop(explode('.',$fn))) !== $this->filetype){
$fn .= '.'.$this->filetype;
}
$this->filename = str_replace(' ','%20', $this->filename);
header( "Content-type: text/plain; charset=utf-8");
header( "Pragma: public" );
header( "Expires: 0" ); // set expiration time
header( "Cache-Component: must-revalidate, post-check=0, pre-check=0" );
header( "Content-type:".$this->mineType );
if(!$schdule){
header( "Content-Length: " . get_file_size( $this->filename ) );
}
if(preg_match("/MSIE/i", $_SERVER["HTTP_USER_AGENT"])){
header( 'Content-Disposition: attachment; filename="'.urlencode($fn).'"' );//解决IE中文乱码
}else{
header( 'Content-Disposition: attachment; filename="'.$fn.'"' );//解决IE中文乱码
}
header( 'Content-Transfer-Encoding: binary' );
readfile( $this->filename );
return true;
}
else
{
return false;
}
}
//add by zcs
function trim_special_str($_str)
{
return str_replace(array('/','?','*',':','"','<','>','\\'),array('','','','','','','',''),$_str);
}
function geterrormsg()
{
return $this->errormsg;
}
function filecheck($schdule)
{
$filename = $this->filename;
$lang_test = $this->CI->lang->language;
header( "Content-type: text/html; charset=utf-8");
if(es_file_exists($filename))
{
$this->filetype=strtolower(array_pop(explode('.',$filename)));
if(in_array($this->filetype,$this->Filter))
{
$this->errormsg.=$filename.$lang_test['file_forbbing_down'];
if($this->debug) exit($filename.$lang_test['file_forbbing_down']) ;
return false;
}else
{
if(!$schdule){
$this->file_mime_type($filename);
}else{
$this->mineType = 'application/msword';
}
if(empty($this->mineType))
{
$this->mineType = isset($this->xlq_filetype[$this->filetype]) ? $this->xlq_filetype[$this->filetype] : 'application/octet-stream';
}
if(!empty($this->mineType))
return true;
else
{
$this->errormsg.= $filename.$lang_test['get_file_type_error'];
if($this->debug) exit($lang_test['get_file_type_error']);
return false;
}
}
}else
{
$filename = iconv("Big5","UTF-8",trim($filename));//防止乱码
$this->errormsg.=$filename.$lang_test['file_not_found'];
if($this->debug) exit($filename.$lang_test['file_not_found']) ;
return false;
}
}
function setfiletype()
{
$this->xlq_filetype['chm']='application/octet-stream';
$this->xlq_filetype['ppt']='application/vnd.ms-powerpoint';
$this->xlq_filetype['odp']='application/vnd.ms-powerpoint';
$this->xlq_filetype['xls']='application/vnd.ms-excel';
$this->xlq_filetype['doc']='application/msword';
$this->xlq_filetype['pptx']='application/vnd.ms-powerpoint';
$this->xlq_filetype['pps']='application/vnd.ms-powerpoint';
$this->xlq_filetype['xlsx']='application/vnd.ms-excel';
$this->xlq_filetype['docx']='application/msword';
$this->xlq_filetype['odt']='application/msword';
$this->xlq_filetype['ods']='application/vnd.ms-excel';
$this->xlq_filetype['ws']='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";
$this->xlq_filetype['swf']="application/x-shockwave-flash";
}
function file_mime_type($file)
{
$regexp = '/^([a-z\-]+\/[a-z0-9\-\.\+]+)(;\s.+)?$/';
if (function_exists('finfo_file'))
{
$finfo = finfo_open(FILEINFO_MIME);
if (is_resource($finfo)){
$mime = @finfo_file($finfo, $file);
finfo_close($finfo);
if (is_string($mime) && preg_match($regexp, $mime, $matches)){
$this->mineType = $matches[1];
return;
}
}
}
if (DIRECTORY_SEPARATOR !== '\\'){
$cmd = 'file --brief --mime ' . escapeshellarg($file) . ' 2>&1';
if (function_exists('exec')){
$mime = @exec($cmd, $mime, $return_status);
if ($return_status === 0 && is_string($mime) && preg_match($regexp, $mime, $matches)){
$this->mineType = $matches[1];
return;
}
}
if ( (bool) @ini_get('safe_mode') === FALSE && function_exists('shell_exec')){
$mime = @shell_exec($cmd);
if(strlen($mime) > 0){
$mime = explode("\n", trim($mime));
if (preg_match($regexp, $mime[(count($mime) - 1)], $matches)){
$this->mineType = $matches[1];
return;
}
}
}
if (function_exists('popen')){
$proc = @popen($cmd, 'r');
if (is_resource($proc)){
$mime = @fread($proc, 512);
@pclose($proc);
if ($mime !== FALSE){
$mime = explode("\n", trim($mime));
if (preg_match($regexp, $mime[(count($mime) - 1)], $matches)){
$this->mineType = $matches[1];
return;
}
}
}
}
}
// Fall back to the deprecated mime_content_type(), if available (still better than $_FILES[$field]['type'])
if (function_exists('mime_content_type')){
$this->mineType = @mime_content_type($file);
if (strlen($this->mineType) > 0){
return;
}
}
}
}
?>
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