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False negative? - FAILED (No max-age or expires)
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False negative? - FAILED (No max-age or expires)
06-10-2010, 12:05 AM
Post: #1
False negative? - FAILED (No max-age or expires)
Ive been playing with webpagetest for last few weeks, but from last 2 - 3 days i have a strange issue.

The result in discussion is at

In the first view, these requests(served via Internap CDB) are listed as cachable while in the repeat they arent.

Firefox 3.6.6pre does not check for these files for each view (checked wia firebug). Neither does IE6 (monitored activity via wireshark) ...

I havent tested this in IE7 or 8 yet .

I think the only change i did was to add "Vary: Accept-Encoding" header so that only gzip compatible browsers get gziped content...

FYI here are the headers for

HTTP/1.0 200 OK
Date: Wed, 09 Jun 2010 13:00:54 GMT
Expires: Mon, 19 Jul 2010 13:00:54 GMT
Server: nginx/0.7.65
Content-Type: image/gif
Content-Length: 6133
Last-Modified: Sun, 05 Nov 2006 06:25:24 GMT
Cache-Control: max-age=3456000
Vary: Accept-Encoding
Cache-Control: max-age=3456000, public
Accept-Ranges: bytes
X-Origin-Date: Tue, 08 Jun 2010 14:45:49 GMT
X-Origin-Expires: Sun, 18 Jul 2010 14:45:49 GMT
X-Cache-Age: 78637
X-Cache: HIT from
X-Origin-Date: Wed, 09 Jun 2010 12:36:26 GMT
X-Origin-Expires: Mon, 19 Jul 2010 12:36:26 GMT
X-Cache-Age: 1468
X-Cache: HIT from
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False negative? - FAILED (No max-age or expires) - sajal - 06-10-2010 12:05 AM

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