[squid-users] multiple requests from single URL on web page?

[Alex Rousskov]

On 10/04/2018 02:37 PM, Kevin Kretz wrote:

> I'm using external_acl_type to handle web traffic based on authenticated
> user and destination.  I'm also passing the referer to the external
> acl.   I know referer isn't to be relied on, but right off the bat I see
> two ACL queries for a single URL.  One has a referrer and the other doesn't.

> Here's the acl line from my squid.conf:

> external_acl_type custom_acl_db cache=0 children-max=5 %ACL %DATA %ul
> %SRC %>rd %{Referer}>h (acl script name)

> Here's the HTML from a very simple page I'm accessing:

> <IMG SRC="http://domain1.com/image1.png">
> <IMG SRC="http://domain2.com/image2.jpg">

> When I access that page through squid, I see one image's URL once, with
> no referrer, and the other one two times - once with a referrer and once
> without:

>  CustomAclDB - kevin 172.18.127.4 domain2.com http://server_hosting_test_page/test/ 
>  CustomAclDB - kevin 172.18.127.4 domain1.com - 
>  CustomAclDB - kevin 172.18.127.4 domain2.com -


> Why the inconsistency?

Do the corresponding HTTP requests received by Squid contain the Referer
header? Use packet captures or "debug_options ALL,2" to see those requests.

Alex.