Originally from http://paul.luminos.nl/update/471:
The CrimsonBase website verifies downloads by passing them through a robust PHP script similar to the one published by Andrew Johnson in his article about PHP-controlled file downloads.
Andrew makes a very important comment at the end of the article:
“If you compress files with Zlib, mod_deflate and so on the Content-Length header won’t be accurate so you’ll end up seeing “Unknown size” and “Unknown time remaining” when downloading files.”
I would like to stress this: if your browser doesn’t appear to be obeying the headers generated by your PHP script—especially
Content-Length
—it is fairly likely that Apache’smod_deflate
extension is enabled.You can easily disable it for a single script using the following line in an applicable
.htaccess
file:SetEnvIfNoCase Request_URI ^/download\.php no-gzip dont-vary
where download.php is here assumed to be in the download script located in the server’s root directory path (e.g.
www.crimsonbase.com/download.php
). (That’s because the regular expression is^/download\.php
.)