PHP代码：Http断点续传的实现例子
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[www.bkjia.com]
/**
* PHP-HTTP断点续传实现
* @param string $path: 文件所在路径
* @param string $file: 文件名
* @return void
*/
function download($path,$file) {
$real = $path.'/'.$file;
if(!file_exists($real)) {
return false;
}
$size = filesize($real);
$size2 = $size-1;
$range = 0;
if(isset($_SERVER['HTTP_RANGE'])) {
header('HTTP /1.1 206 Partial Content');
$range = str_replace('=','-',$_SERVER['HTTP_RANGE']);
$range = explode('-',$range);
$range = trim($range[1]);
header('Content-Length:'.$size);
header('Content-Range: bytes '.$range.'-'.$size2.'/'.$size);
} else {
header('Content-Length:'.$size);
header('Content-Range: bytes 0-'.$size2.'/'.$size);
}
header('Accenpt-Ranges: bytes');
header('application/octet-stream');
header("Cache-control: public");
header("Pragma: public");
//解决在IE中下载时中文乱码问题
$ua = $_SERVER['HTTP_USER_AGENT'];
if(preg_match('/MSIE/',$ua)) {
$ie_filename = str_replace('+','%20',urlencode($file));
header('Content-Dispositon:attachment; filename='.$ie_filename);
} else {
header('Content-Dispositon:attachment; filename='.$file);
}
$fp = fopen($real,'rb+');
fseek($fp,$range);
while(!feof($fp)) {
set_time_limit(0);
print(fread($fp,1024));
flush();
ob_flush();
}
fclose($fp);
}
/*End of PHP*/
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