ssl file download problem

[maheswaran]

HI All,

I have problem in files downloading over ssl. When am trying with IE Browser i got

"Internet Explorer cannot download 40 from blah.gov
Internet Explorer was not able to open this Internet site. The requested site is either unavailable or cannot be found. Please try again later."

Whem am tried with mozile firebox i can download small size files but could not download max size files... here my code

if(is_file($dir."/".$file))
  {
  header("Content-Disposition: attachment; filename=\"$file\";");
  header("Content-Type: file/x-msdownload");
  header("Content-Length: ".filesize($dir."/".$file));
  //echo file_get_contents($dir."/".$file);
  $handle = fopen($dir."/".$file, "rb");
  while (!feof($handle)) echo fread($handle, 8192);
  fclose($handle);
  }
else if(is_dir($dir."/".$file))
    {
    include_once("lib/zip.lib.php");
 
    $newzip = new zipfile();
    chdir($dir);
    $name=$file;
    add_dir($name,$newzip);
 
    header("Content-Disposition: attachment; filename=".$name."_navphp.zip");
    header("Content-Type: file/x-msdownload");
    $data=$newzip->file();
    header("Content-Length: ".strlen($data));
    echo $data;
  }  
 

am using to add some methods like
header("Cache-Control: no-store, no-cache, must-revalidate");
but not succeed ... what is the problem....

[Atli]

Hi.

You might have to enable SSL in IE.
You can find that in Tools->Internet Options->Advanced and then find the SSL options near the bottom of the list.

As to why Firefox would have problems with this, I do not know.
Is it giving you any errors? (Check the Tools->Error Console window)

[maheswaran]

Off course i enabled ssl option in IE.

Tools->advanced->use ssl 1.0 & 2.0 & 3.0

[maheswaran]

Hi All,

i got the answer.... I have modified my code as below and download is working fine....

header("Pragma: public");
      header("Expires: 0");
      header("Cache-Control: must-revalidate, post-check=0, pre-check=0");
      header("Cache-Control: private",false);
      //header ( "Content-Type: $filedatatype" );
      header("Content-Disposition: attachment; filename=\"".$file1."\";");
      header("Content-Transfer-Encoding:* binary");
      header("Content-Length: ".filesize($file));
 

But do not know why this code work under ssl... my guess is to determine the cache control is the solution....

[Atli]

I'm glad you found a solution!
Thanks for sharing it.

@maheswaran
I would put my bet on the Content-Transfer-Encoding:* binary header.
It tells the browsers how the data is encoded during the transfer.
Perhaps this is required when dealing with SSL transfers.

In any case, you can just comment the headers out, one by one. See which one causes the download to fail.