【www.gdgbn.com--安卓教程】
function sendfile($myFile){
$mm_type="application/octet-stream";
$fp = fopen($myFile,"rb");
$size = filesize($myFile);
ob_start();
header("Cache-Control: public, must-revalidate");
header("Pragma: hack");
header("Content-Type: " . $mm_type);
header("Content-Disposition: attachment; filename="".$fname.""");
header("Content-Transfer-Encoding: binary ");
if (isset($_SERVER["HTTP_RANGE"]) && ($_SERVER["HTTP_RANGE"] != "") && preg_match("/^bytes=([0-9]+)-/i", $_SERVER["HTTP_RANGE"], $match) && ($match[1] < $size)) {
$range = $match[1];
fseek($fp, $range);
header("HTTP/1.1 206 Partial Content");
//header("Date: " . gmdate("D, d M Y H:i:s") . " GMT");
header("Last-Modified: ".gmdate("D, d M Y H:i:s", filemtime($myFile))." GMT");
header("Accept-Ranges: bytes");
$rangesize = ($size - $range) > 0 ? ($size - $range) : 0;
header("Content-Length:".$rangesize);
header("Content-Range: bytes ".$range."-".($size-1)."/".$size);
//header("Connection: close"." ");
}else{
header("Content-Length: ".(string)($size));
header("Accept-Ranges: bytes");
$range = 0;
}
fpassthru($fp);
ob_end_flush();
}