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List:       privoxy-developers
Subject:    [privoxy-devel] [ ijbswa-Bugs-1170767 ] Domain Pattern Matching Problem
From:       "SourceForge.net" <noreply () sourceforge ! net>
Date:       2005-06-09 5:32:26
Message-ID: E1DgFeU-0000KG-QZ () sc8-sf-web4 ! sourceforge ! net
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Bugs item #1170767, was opened at 2005-03-26 05:56
Message generated for change (Comment added) made by crc32
You can respond by visiting:
https://sourceforge.net/tracker/?funcŪtail&atid1118&aid70767&group_id118

Please note that this message will contain a full copy of the comment thread,
including the initial issue submission, for this request,
not just the latest update.
Category: None
Group: None
Status: Open
Resolution: None
Priority: 5
Submitted By: Nobody/Anonymous (nobody)
Assigned to: Nobody/Anonymous (nobody)
Summary: Domain Pattern Matching Problem

Initial Comment:
Privoxy version: 3.0.3
Operating System: Windows 2000 Professional
Using MS IE 6.0 on same OS
Contact: siveyl@oclc.org


I discovered a bug in domain pattern matching.  I'm trying to +block domains that \
contain certain words.  Here's an example:

{ +block }
.*badword*.

The above will successfully block almost any domain containing the word badword, \
however it will not block:

www.bbadword.com

It will block:

www.abadword.com
www.cbadword.com

I looks as though if the first letter of any badword coded this way is repeated in \
the attempted URL, the domain pattern matching algorithm fails.


----------------------------------------------------------------------

Comment By: Oliver Yeoh (crc32)
Date: 2005-06-09 13:32

Message:
Logged In: YES
user_idU4501

I have submitted a patch #1217393. Hopefully it resolves the
problem.

----------------------------------------------------------------------

Comment By: Lonny Sivey (noube4me)
Date: 2005-05-13 02:20

Message:
Logged In: YES
user_id48867

Anyway, we aren't really talking about regular expressions
when it comes to the domain pattern.  According to the
Privoxy manual, only the path portion of the URL is treated as
a regular expression.  The domain portion has different rules.

----------------------------------------------------------------------

Comment By: Lonny Sivey (noube4me)
Date: 2005-05-12 23:49

Message:
Logged In: YES
user_id48867

It doesn't block www.aabadword.com either.

----------------------------------------------------------------------

Comment By: Lonny Sivey (noube4me)
Date: 2005-05-12 23:32

Message:
Logged In: YES
user_id48867

The proposed solution of using .*?badword*. instead does not
work either because that domain pattern fails to block
www.badword.com.

So that's no solution either.

----------------------------------------------------------------------

Comment By: sc_deimos (sc_deimos)
Date: 2005-05-02 12:40

Message:
Logged In: YES
user_id89857

This is *NOT* a bug - I've seen similar behaviour in RegEx engines.

I just tried this in Privoxy and proves that it works correctly:

{ +block }
.*?badword*.

The ? (question mark) following the * (asterisk) makes it less-hungry, so it will \
properly block all of the following URL's...

http://www.abadword.com/
http://www.bbadword.com/
http://www.cbadword.com/


----------------------------------------------------------------------

Comment By: sc_deimos (sc_deimos)
Date: 2005-05-02 12:39

Message:
Logged In: YES
user_id89857

This is *NOT* a bug - I've seen similar behaviour in RegEx engines.

I just tried this in Privoxy and proves that it works correctly:

{ +block }
.*?badword*.

The ? (question mark) following the * (asterisk) makes it less-hungry, so it will \
properly block all of the following URL's...

http://www.abadword.com/
http://www.bbadword.com/
http://www.cbadword.com/


----------------------------------------------------------------------

Comment By: David Schmidt (david__schmidt)
Date: 2005-04-04 11:13

Message:
Logged In: YES
user_id$9980

I verified this is a problem.  I turned debugging all the way up, but it isn't \
readily admitting where it's making the go/no-go decisions.  Need oes to debug \
quickly, or else somebody has to go spelunking. :-)

----------------------------------------------------------------------

You can respond by visiting:
https://sourceforge.net/tracker/?funcŪtail&atid1118&aid70767&group_id118


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