Check the HTTP response header of your response.
This is what project gutenberg spits out as an example:
Quote:
Status: HTTP/1.1 200 OK
Server: Apache
Content-Disposition: attachment; filename=pg38934-images.epub
X-Rate-Limiter: php
Cache-Control: max-age=86400
X-Frame-Options: sameorigin
Content-Type: application/epub+zip
Content-Length: 281011
X-Powered-By: 3
X-Hits: 1
Date: Tue, 21 Feb 2012 13:48:47 GMT
X-Varnish: 1635092337 1635083511
Age: 323
Via: 1.1 varnish
Connection: close
|
I got this info via
web-sniffer.net
Regards
Aydan