SSL IE File Download Problem and Solution
We've just installed an SSL certificate for a client whose website has a built in file manager. Each file download is passed through a series of PHP scripts to analyse the origin of the download and so on. To do this the file itself is read through PHP and held in a cache (as far as IE is concerned anyway). When the SSL was installed this system broke with Firefox behaving normally, but IE giving a message indicating that the file could not be found.
The solution was, in the end, quite a simple one thankfully. The header for the downloaded file needed to be changed from
header('Cache-Control: public');
to
header('Cache-Control: private');
header('Pragma: private');
and the job was done.
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