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From Joe Schaefer <>
Subject Re: Earliest Hook to Inspect POST Params
Date Sat, 31 Jul 2004 18:25:09 GMT
Stas Bekman <> writes:

> Joe Schaefer wrote:
> > Eli Marmor <> writes:
> [...]
> >>I'm not creating any content (so a normal handler is not needed), and
> >>I'm transparent and not modifying the request/response (so no filter is
> >>needed), but just logging the information and want to know what is the
> >>earliest phase that is already safe enough to parse the POST
> >>parameters.
> > Sounds to me like you really want to write a logging handler, which
> > is sort of the opposite question.
> >   "What's the latest hook that can be used?"
> > Any hook that runs before the content handler does should be fine.
> > If you're writing a log handler, all your pre-content-handler hook needs to
> > do is call
> >   req = apreq_request(r, NULL);
> > This will register mod_apreq's input filter.  By the time your logging
> > handler runs, the request body will be parsed, so the same call will
> > provide your log handler with the fully parsed data.
> That's very risky, unless you have a full control over the modules that you
> use. Anybody can grab the POST data before the log phase is happening
> w/o using libapreq2 and you will be left with no POST when the logging
> phase will come. 

Could you give a specific example about when you believe this is risky?
(I've left my full quote intact so you can point out the problem).

mod_apreq will always see exactly the same POST data that the 
content-handler sees; and it does not matter what the content 
handler decides to do with the data.

Joe Schaefer

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