note 65667 deleted from function.header by bjori
| From: | bjori@php.net | Date: | Tue, 17 Apr 2007 09:31:40 +0000 |
| Subject: | note 65667 deleted from function.header by bjori | ||
| References: | 1 | Groups: | php.notes |
| Request: | Send a blank email to php-notes+get-125503@lists.php.net to get a copy of this message | ||
Note Submitter: pechkin at zeos dot net
----
I've created script that gives users ability to download files from closed directory. It
supports multithread download and download resuming
<?php
$fname = $_GET['file'];
$fpath = "downloads/$fname";
$fsize = filesize($fpath);
$bufsize = 20000;
if(isset($_SERVER['HTTP_RANGE'])) //Partial download
{
if(preg_match("/^bytes=(\\d+)-(\\d*)$/", $_SERVER['HTTP_RANGE'], $matches)) {
//parsing Range header
$from = $matches[1];
$to = $matches[2];
if(empty($to))
{
$to = $fsize - 1; // -1 because end byte is included
//(From HTTP protocol:
// 'The last-byte-pos value gives the byte-offset of the last byte in the range; that is, the
byte positions specified are inclusive')
}
$content_size = $to - $from + 1;
header("HTTP/1.1 206 Partial Content");
header("Content-Range: $from-$to/$fsize");
header("Content-Length: $content_size");
header("Content-Type: application/force-download");
header("Content-Disposition: attachment; filename=$fname");
header("Content-Transfer-Encoding: binary");
if(file_exists($fpath) && $fh = fopen($fpath, "rb"))
{
fseek($fh, $from);
$cur_pos = ftell($fh);
while($cur_pos !== FALSE && ftell($fh) + $bufsize < $to+1)
{
$buffer = fread($fh, $bufsize);
print $buffer;
$cur_pos = ftell($fh);
}
$buffer = fread($fh, $to+1 - $cur_pos);
print $buffer;
fclose($fh);
}
else
{
header("HTTP/1.1 404 Not Found");
exit;
}
}
else
{
header("HTTP/1.1 500 Internal Server Error");
exit;
}
}
else // Usual download
{
header("HTTP/1.1 200 OK");
header("Content-Length: $fsize");
header("Content-Type: application/force-download");
header("Content-Disposition: attachment; filename=$fname");
header("Content-Transfer-Encoding: binary");
if(file_exists($fpath) && $fh = fopen($fpath, "rb")){
while($buf = fread($fh, $bufsize))
print $buf;
fclose($fh);
}
else
{
header("HTTP/1.1 404 Not Found");
}
}
?>