Re: How squid caches some things

From: Andrey Shorin <tolsty@dont-contact.us>
Date: Sat, 8 Oct 2005 14:18:37 +0400

Hello Evgeny,

Saturday, October 8, 2005, 14:09:20, Evgeny Kotsuba wrote:

> There is some page that contains:
> -----8<--------------------------------------
> <html><head>
> <meta HTTP-EQUIV="PRAGMA" content="NO-CACHE">

> <meta HTTP-EQUIV="Refresh"
> CONTENT="20;URL='http://kubok.yandex.ru/regkubok_msk1/XXXX">
> [......]
> <td rowspan="3"
> background="http://kubok.yandex.ru/i/empty-top.jpg"><img
> src="/i/top6.gif" width="351" height="105" usemap="#Map"
border="0">><img src="http://u1386.48.spylog.com/cnt?p=1"
> [......]
> <img src="/i/artlebedev.gif"
> -----8<--------------------------------------
> So that every 20 sec squid gets this page again as well as 4
> external links from this page with records in access log like

> -----8<--------------------------------------
> 1128764141.130 4280 127.0.0.1 TCP_CLIENT_REFRESH_MISS/200 743 GET
> http://kubok.yandex.ru/i/empty-top.jpg evg DIRECT/213.180.204.2
> image/jpeg
> 1128764141.130 3960 127.0.0.1 TCP_CLIENT_REFRESH_MISS/200 1017 GET
> http://kubok.yandex.ru/i/artlebedev.gif evg DIRECT/213.180.204.2
> image/gif
> 1128764141.170 6090 127.0.0.1 TCP_CLIENT_REFRESH_MISS/200 5270 GET
> http://kubok.yandex.ru/i/top6.gif evg DIRECT/213.180.204.2 image/gif
> 1128764165.720 580 127.0.0.1 TCP_CLIENT_REFRESH_MISS/503 1112 GET
> http://u1386.48.spylog.com/cnt? evg NONE/- text/html
> -----8<--------------------------------------
> I have in config
> acl QUERY urlpath_regex cgi-bin \?
> no_cache deny QUERY

> So it`s no surprising with u1386.48.spylog.com/cnt?, but why get
> extra 3 images ?
Squid doesn't look inside HTML contents. HTTP headers for each of the
images would be more appropriate to look at. Try HEAD http://... (if
you have perl installed). Make sure it uses your squid as a proxy.
Setting environment variable http_proxy should be enough.

-- 
Best regards,
 Andrey Shorin
Received on Sat Oct 08 2005 - 04:18:40 MDT

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