Problems with dynamic file passthru

[php_for_voip]

Hi,

I am having problem getting file passthru working with MSIE 6.0.

I generate a dynamic file based on parameters from a form submission, zip it and then do the following:

$len = filesize($zipfile);

if (strstr(strtolower($_SERVER['HTTP_USER_AGENT']), 'msie 5.5')) {
  $att = '';
} else {
  $att = 'attachment;';
}

header ('Content-Description: File Transfer');
header ('Content-Type: application/force-download');
header('Content-Type: application/download');
header('Content-type: application/x-zip-compressed');
header ('Content-Length: ' . $len);
header('Content-Disposition: ' . $att . ' filename="' . $zipfile . '"');

$fpdownload = fopen($zipfile, 'rb');
fpassthru($fpdownload);
fclose($fpdownload);

Using Mozilla or Opera it works like a dream so I am sure there is nothing wrong with the file generation itself. But when using MSIE, the browser tries to download the php file itself, not the file I generate (at least that's what it looks like). I've tried readifle instead of fpassthru with identical results.

Any suggestions appreciated.

[Installer]

It works for me with IE 6.

[php_for_voip]

Originally posted by Installer
It works for me with IE 6.

Not the reply I was hoping for! ;-)

I cannot get it to work no matter what variations I try. Is there any special circumstance or cause of the symptoms I am getting (eg php configuration, web browser settings, etc)?

Again, just to clarify the steps:

1) A php file with a form submitting to PHP_SELF loads up
2) User fills in form and submits
3) php reloads, generates file based on entered parameters and performs passthru

Using MSIE 6.0, the web browser will try and download the php file, not the zip file I generate. Don't want to sound patronising it's just that I am at a loss to pin down why this isn't working with MSIE.

Thanks for the help.

[Installer]

at least that's what it looks like

In what way? Does IE show you the "open or save" dialog?

[php_for_voip]

I get a dialog box specifying the filename (the url instead of the zip file) and an option to Open or Save.

Because the URL includes a session id the client is unable to determine what type of file it is hence the prompt.

As you can see from the code I submitted above I do make efforts to try and tell the web browser where the file is and what type of file it is.

[Installer]

Try using these headers:

header('Cache-Control: public');
header('Content-Type: application/octet-stream'); 
header('Content-Length: ' . $len); 
header('Content-Disposition: ' . $att . ' filename=' . $zipfile); 

or these:

 header('Cache-Control: ');
header('Pragma: ');
header('Content-type: application/octet-stream');
header('Content-length: ' . $len);
header('Content-Disposition: ' . $att . ' filename=' . $zipfile);

[php_for_voip]

Well done! 😃

It was the second option that worked:

Originally posted by Installer

 header('Cache-Control: ');
header('Pragma: ');
header('Content-type: application/octet-stream');
header('Content-length: ' . $len);
header('Content-Disposition: ' . $att . ' filename=' . $zipfile);

[/B]

Only remaining bug was the filename of the downloaded file. Fixed that by changing the filename value in the Content-Disposition tag to 'basename($zipfile)'

Thank you very much.