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jdc8 / wikitcl

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"504 Proxy loop detected" when using Polipo 0.9.9 #17

Closed GoogleCodeExporter closed 9 years ago

GoogleCodeExporter commented 9 years ago 
What steps will reproduce the problem?
1. Install Polipo 0.9.9
2. Configure Web browser to use Polipo as HTTP proxy
3. Enter http://wiki.tcl.tk/ in the address bar

What is the expected output? What do you see instead?
I should see the Tcl wiki, but instead I get "The proxy on (host:port)
encountered the following error while fetching http://wiki.tcl.tk/:
504 Proxy loop detected".

Original issue reported on code.google.com by andrew.m.goth@gmail.com on 3 Jul 2007 at 1:07

GoogleCodeExporter commented 9 years ago 
I do not believe that anything the server (itself not being a proxy) can cause a
proxy loop, in that the server can't choose your proxy for you.

That being understood, it's possible that the server response is somehow 
offending
Polipo, and the error triggered by that.  I think it's an erroneous error from
polipo, which it apparently has a history of.

If you would be so kind as to refer this to the polipo people, and if they can
specify what's offending them, and it's an out-of-spec performance by the 
server, I
will certainly fix it.

Without some accurate feedback from polipo, I'm shooting in the dark.

Original comment by mcc...@gmail.com on 3 Jul 2007 at 1:52

GoogleCodeExporter commented 9 years ago 
I upgraded to Polipo 1.0.1, and the problem went away.  Apparently the issue
(whatever it was) has already been noticed and fixed by the Polipo developers.

I had assumed there was some sort of funny proxying involved in the Tcl Wiki 
after
being reinstated, since it's the only site for which I have seen Polipo 
misbehave. 
Thank you for setting me straight about this.

I have sent an email about this problem to Juliusz Chroboczek, the primary 
author of
Polipo.

Original comment by andrew.m.goth@gmail.com on 3 Jul 2007 at 3:22

GoogleCodeExporter commented 9 years ago 
It may *well* be that there's some Wub deviation from the standard which causes
polipo to get offended.  If you do happen to find out what that is, I'd be 
interested
to learn it, so that I can fix it.

Original comment by mcc...@gmail.com on 3 Jul 2007 at 2:32

GoogleCodeExporter commented 9 years ago 
[deleted comment]
GoogleCodeExporter commented 9 years ago 
[deleted comment]
GoogleCodeExporter commented 9 years ago 
(for some reason I seem to be having problems adding comments)

The author of Polipo writes:

> Accessing any page in the Tcl Wiki (http://wiki.tcl.tk/) results in an
> erroneous 504 when using Polipo 0.9.9.  Upgrading to 1.0.1 fixes the problem.

No, it doesn't, it just works around it.  You can still reproduce the           
issue with 1.0.1 if you set

 disableVia: false

in Polipo's config file.

The Wiki code is broken.  For some strange reason, it is echoing the
client's Via header in the reply.  This breaks Polipo.

                                       Juliusz

Original comment by andrew.m.goth@gmail.com on 3 Jul 2007 at 4:25