zhujy2002
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注册 2006-12-12
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[推荐阅读] 关于引用的问题.
提供一个
<?php
class filedown
{
var $mdownstart;
var $mfilesize;
var $mfilehandle;
var $mfilepath;
var $mfilename;
var $mfileext;
function filedown()
{
}
//public
function down($pfilepath, $pfilename = '')
{
$this->mfilepath = $pfilepath;
if(!$this->ini_file()) $this->send_error();
$this->mfilename = empty($pfilename) ? $this->get_filename() : $pfilename;
$this->set_start();
$this->set_header();
$this->send();
}
function ini_file()
{
if(!is_file($this->mfilepath)) return FALSE;
$this->mfilehandle = fopen($this->mfilepath, 'rb');
$this->mfilesize = filesize($this->mfilepath);
$this->mfileext = fileext($this->mfilepath);
return TRUE;
}
function set_start()
{
if(!empty($_server['http_range']) && preg_match("/^bytes=([d]?)-([d]?)$/i", $_server['http_range'], $match))
{
if(empty($match[1])) $this->mdownstart = $match[1];
fseek($this->mfilehandle, $this->mdownstart);
}
else
{
$this->mdownstart = 0;
}
}
function set_header()
{
@header("cache-control: public");
@header("pragma: public");
header("content-length: " . ($this->mfilesize - $this->mdownstart));
if ($this->mdownstart > 0)
{
@header("http/1.1 206 partial content");
header("content-ranges: bytes" . $this->mdownstart . "-" . ($this->mfilesize - 1) . "/" . $this->mfilesize);
}
else
{
header("accept-ranges: bytes");
}
header("content-disposition: attachment; filename=" .$this->mfilename);
header("content-type:".$this->get_filetype());
}
function get_filename()
{
return basename($this->mfilepath);
}
function get_filetype()
{
$filetype['chm']='application/octet-stream';
$filetype['ppt']='application/vnd.ms-powerpoint';
$filetype['xls']='application/vnd.ms-excel';
$filetype['doc']='application/msword';
$filetype['exe']='application/octet-stream';
$filetype['rar']='application/octet-stream';
$filetype['js']="javascript/js";
$filetype['css']="text/css";
$filetype['hqx']="application/mac-binhex40";
$filetype['bin']="application/octet-stream";
$filetype['oda']="application/oda";
$filetype['pdf']="application/pdf";
$filetype['ai']="application/postsrcipt";
$filetype['eps']="application/postsrcipt";
$filetype['es']="application/postsrcipt";
$filetype['rtf']="application/rtf";
$filetype['mif']="application/x-mif";
$filetype['csh']="application/x-csh";
$filetype['dvi']="application/x-dvi";
$filetype['hdf']="application/x-hdf";
$filetype['nc']="application/x-netcdf";
$filetype['cdf']="application/x-netcdf";
$filetype['latex']="application/x-latex";
$filetype['ts']="application/x-troll-ts";
$filetype['src']="application/x-wais-source";
$filetype['zip']="application/zip";
$filetype['bcpio']="application/x-bcpio";
$filetype['cpio']="application/x-cpio";
$filetype['gtar']="application/x-gtar";
$filetype['shar']="application/x-shar";
$filetype['sv4cpio']="application/x-sv4cpio";
$filetype['sv4crc']="application/x-sv4crc";
$filetype['tar']="application/x-tar";
$filetype['ustar']="application/x-ustar";
$filetype['man']="application/x-troff-man";
$filetype['sh']="application/x-sh";
$filetype['tcl']="application/x-tcl";
$filetype['tex']="application/x-tex";
$filetype['texi']="application/x-texinfo";
$filetype['texinfo']="application/x-texinfo";
$filetype['t']="application/x-troff";
$filetype['tr']="application/x-troff";
$filetype['roff']="application/x-troff";
$filetype['shar']="application/x-shar";
$filetype['me']="application/x-troll-me";
$filetype['ts']="application/x-troll-ts";
$filetype['gif']="image/gif";
$filetype['jpeg']="image/pjpeg";
$filetype['jpg']="image/pjpeg";
$filetype['jpe']="image/pjpeg";
$filetype['ras']="image/x-cmu-raster";
$filetype['pbm']="image/x-portable-bitmap";
$filetype['ppm']="image/x-portable-pixmap";
$filetype['xbm']="image/x-xbitmap";
$filetype['xwd']="image/x-xwindowdump";
$filetype['ief']="image/ief";
$filetype['tif']="image/tiff";
$filetype['tiff']="image/tiff";
$filetype['pnm']="image/x-portable-anymap";
$filetype['pgm']="image/x-portable-graymap";
$filetype['rgb']="image/x-rgb";
$filetype['xpm']="image/x-xpixmap";
$filetype['txt']="text/plain";
$filetype['c']="text/plain";
$filetype['cc']="text/plain";
$filetype['h']="text/plain";
$filetype['html']="text/html";
$filetype['htm']="text/html";
$filetype['htl']="text/html";
$filetype['rtx']="text/richtext";
$filetype['etx']="text/x-setext";
$filetype['tsv']="text/tab-separated-values";
$filetype['mpeg']="video/mpeg";
$filetype['mpg']="video/mpeg";
$filetype['mpe']="video/mpeg";
$filetype['avi']="video/x-msvideo";
$filetype['qt']="video/quicktime";
$filetype['mov']="video/quicktime";
$filetype['moov']="video/quicktime";
$filetype['movie']="video/x-sgi-movie";
$filetype['au']="audio/basic";
$filetype['snd']="audio/basic";
$filetype['wav']="audio/x-wav";
$filetype['aif']="audio/x-aiff";
$filetype['aiff']="audio/x-aiff";
$filetype['aifc']="audio/x-aiff";
$filetype['swf']="application/x-shockwave-flash";
return array_key_exists($this->mfileext, $filetype) ? $filetype[$this->mfileext] : $this->mfileext;
}
function send()
{
fpassthru($this->mfilehandle);
}
//public
function send_error()
{
@header("http/1.0 404 not found");
@header("status: 404 not found");
exit();
}
}
?>
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