40813 - Incorrect broken links when using 'adzapper' proxy

Status: VERIFIED INVALID

(Core :: Networking, defect, P3)

Description

[Dan McGuirk]

From Bugzilla Helper:
User-Agent: Mozilla/4.61 [en] (X11; I; Linux 2.2.12-20 i686)
BuildID:    2000042708

I'm using an ad filtering proxy called 'adzapper' that is available at
http://www.zaplet.org/adamf/adzapper/.  When following a link, I'll often get a
broken link error from the destination site for a link that is not really
broken.

Reproducible: Sometimes
Steps to Reproduce:
	(1) Start Mozilla.  (Configured to use adzapper proxy.)
	(2) Go to www.jabber.org.
	(3) Click 'Documentation'.
	(4) Click 'Jabber Technology Overview'.


Actual Results:  About 90% of the time I get a "Not Found" from docs.jabber.org
(the target of the link).  Sometimes it does work, though.  If I press "reload"
on the "Not Found" page, the page comes up correctly.

The page always comes up correctly if I don't use the proxy, or if I use
Netscape 4 with or without the proxy.


Expected Results:  The page should always show up correctly the first time.

Comment 1

[Dan McGuirk]

This happens lots of other places, too (I just saw it happen when trying to
follow the 'Bugzilla Helper' link from http://bugzilla.mozilla.org).  I think
having the target of the link on a different host than the source may be
significant.

Comment 2

[Dan McGuirk]

OK, so it looks like the bug is actually in adzapper.  Its handling of Keep-

Alive seems very broken.

Comment 3

[Blake Ross]

vrfy