external hooks (was Re: I've started seeing 403's on proxyPass th ings)

[Ian Holsman <Ia...@cnet.com>]

Ian Holsman wrote:

>> and have noticed that my reverse proxies are getting 403'd. (where they were working fine
>> last time)

>One thing that I have found to be a brilliant tool for debugging these
>sorts of things is a program called tcpflow. It records tcp connections,
>and saves them in files (or outputs them to the console). It's really
>useful for finding out exactly who is saying what to what.

sounds good.


>> what do you guys think of adding a hook (like mod-include has) where people could register a function to
>> add extra headers to the r-proxy call?

>Hmmm - this is an interesting one. There is the output filter chain,
>which can have filters added to it (which could add headers, or do other
>things). There is also the backend filter chain, which handles
>communication with the backend - and currently you cannot add external
>filters to it. I'll try look at this this and see what I can come up
>with...


Ok.. the reason is the following.

we plan on adding info to the notes table to set up things like Language, Locale,
and if the request is a robot/spider (and some other stuff).
we need to pass this to our application server, as extra header fields (simmilar to the 
X-Forwarded one )

the other thing we need for logging is when a redirect on the app-server gets done, we
need to set some notes saying where they got redirected to. 


the problem with filters for the first part would be that I would have to write 2 modules.
one a content handler (which would do the setting of the notes based on the incoming header,
or setting of the notes from things like mod_include)

and one a filter which could add the stuff to the proxied header.


..Ian
>Regards,
>Graham 
>-------------------------------------------
>minfrin@sharp.fm "There's a moon
>over Bourbon Street
>tonight..."

--
Ian Holsman
Performance Measurement & Analysis
415-364-8608 

Re: external hooks (was Re: I've started seeing 403's on proxyPass things)

[Graham Leggett <mi...@sharp.fm>]

Ian Holsman wrote:

> we plan on adding info to the notes table to set up things like Language, Locale,
> and if the request is a robot/spider (and some other stuff).
> we need to pass this to our application server, as extra header fields (simmilar to the
> X-Forwarded one )

As I understand it all of this information is available in request
headers anyway, all of which is available to the application server.

> the other thing we need for logging is when a redirect on the app-server gets done, we
> need to set some notes saying where they got redirected to.

This is easily calculated from the setting of ProxyPassReverse.

What exactly would the extra bits need to do? All of the info you want
seems to already be available.

Regards,
Graham 
-- 
-----------------------------------------
minfrin@sharp.fm		"There's a moon
					over Bourbon Street
						tonight..."