On 8/11/2010 9:35 AM, Thierry Emmanuel wrote:
-----Original Message-----
From: wireshark-users-bounces@xxxxxxxxxxxxx [mailto:wireshark-users-bounces@xxxxxxxxxxxxx] On Behalf Of Jeffs
Sent: mercredi 11 ao�t 2010 15:07
To: Community support list for Wireshark
Subject: Re: [Wireshark-users] filter for ONLY initial get request
This formula, however, only returns results minus the links and images
embedded in the web page:
tshark -r test.cap -T fields -e http.host | sed 's/?.*$//' | sed -n
'/www./p' | sort | uniq -c | sort -rn | head -n 100
15 www.propertyshark.com
8 www.nytimes.com
2 www.google-analytics.com
1 www.facebook.com
However, I am new to regex so I'm sure I may be missing something or
losing some links.
It is a common mistake to consider that every websites have their main
address on a "www" subdomain. If you want a generic filter, you cannot
rely on it. If you want a relevant result, you'll have to build a
non-restrictive regexp and manually filter unappropriate results,
eventually making some rules to exclude well-known advertising sites.
A fully automatic solution would be to parse the data checking it is
a well-formed html (or xml or plain-text) document. This will purge
videos and images from your results.
I agree that not all websites have their main address as "www". But
given that I am up until now unable to effectively remove all the extra
domains that are captured and I am therefore bringing in a lot of
extraneous domain names, I have to choose between the lesser of two
evils -- lose some domains or pull in a lot of unwanted domain names
that totally pollute my desired results.
I wish there was a way to capture ONLY the initially requested URL that
is either clicked or typed into the browser address bar.
I was thinking that maybe a tap might solve this problem because it
would capture only one half of a duplex conversation on one wire (the
outgoing request) and thus only capture the requested URL.
Your suggestion of parsing the data is indeed unique and intersting.
Are you suggesting that dumpcap or ethereal would somehow interogate the
link, follow it and then make a determination. This sounds like a very
interesting prospect but I'm not fully sure I understand how it would work.
Thank you.
