Sis/Sisx file detection ?

[something else]

Anyone know how to detect if the file is really a sis(x) file thats been uploaded and not a renamed extension?

like on wen.ru`s uploaders

Im guessing its done on headers

[GiLL]

could not understand may be like this?

<?php
$filename = $_GET['file'];
 
if(endsWith($filename, '.sisx'))
{
    header('Content-type: x-epoc/x-sisx-app');
	header('Content-Disposition: attachment; filename="'.$filename.'"');
	readfile($filename);
}
else if(endsWith($filename, '.sis'))
{
    header('Content-type: application/vnd.symbian.install');
	header('Content-Disposition: attachment; filename="'.$filename.'"');
	readfile($filename);
}
else
{
	print('Not file to download');
}
 
function endsWith( $str, $sub )
{
    return ( substr( $str, -strlen( $sub ) ) == $sub );
}
?>

[something else]

Thanks but not quite what i mean

example:

I have an uploader that only allows files sis and sisx files to be uploaded.

I then Rename "something.mp3" to "something.sis" to try and bypass the extension uploading rule ...
However it is possible to pick up on if its a true sis(x) file rather than a renamed mp3 or other format.

Im guessing sis/sisx files give some header information that proves they are sis/sisx files

[EnDLesS]

sis decompiler need to be installed for sis ,cant say bout sisx.

[metulj]

sis decompiler need to be installed for sis ,cant say bout sisx.

sis decompiler ???
i'd really like to know how you gonna
install sis decompiler onto web server !??!??

[EnDLesS]

Sorry u got me rong ,meant a class to check sis file info.