header("Content-type:text/html;charset=utf-8");
$file=urldecode($_GET['name']);
if(preg_match("/\//", $file)){die("sb");}
$file="./success/".$file;
$suffix = substr($file,strrpos($file,'.')); //获取文件后缀
$down_name = urldecode($_GET['name']); //新文件名,就是下载后的名字
//判断给定的文件存在与否
if(!file_exists($file)){
die("您要下载的文件已不存在");
}
$download_rate = 20.5;//下载速度 单位 KB/s
$fp = fopen($file,"r");
$file_size = filesize($file);
//下载文件需要用到的头
header("Content-type: application/octet-stream");
header("Accept-Ranges: bytes");
header("Accept-Length:".$file_size);
header("Content-Disposition: attachment; filename=".$down_name);
$buffer = 1024;
//向浏览器返回数据
while(!feof($fp) ){
print $file_con = fread($fp,round($download_rate * $buffer));
flush();
sleep(1);
}
fclose($fp);
?>