I'm trying to use HTTP "If-Modified-Since" header.
- My server responds to every HTTP request with "Last-Modified" header.
- When the client sends the same request again, it updates the "If-Modified-Since" header accordingly.
This works fine with Chrome and Firefox but not with Internet-Explorer 11.
I tried adding "Expires" header and set it for '-1', As mentioned here. However it didn't work either.
These are the respond header:
HTTP/1.1 200 OK
Pragma:
Cache-Control: Public
Expires: Thu, 01 Jan 1970 02:00:00 IST
X-FRAME-OPTIONS: SAMEORIGIN
Strict-Transport-Security: max-age=31536000
Date: Tue, 29 Jul 2014 07:54:08 GMT
Etag: 2014-07-28 18:57:23.0_2108737535
Last-Modified: Mon, 28 Jul 2014 18:57:23 IDT
Cache-Control: max-age=10
Content-disposition: inline; filename=Ad.pdf; filename*=UTF-8''Ad.pdf
Content-Type: application/pdf
Content-Length: 27743
Any suggestions?
TNX