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Re: Question about arguments from a GET/POST request

Thibault Koechlin
November 02, 2010 07:18AM
Hi Eric,

Regarding arguments/body parsing, I've also found form-input module to
be pretty instructive, but due to the way my module work, it isn't
enough for me (ie: I need to parse every argument and validate them, not
fetch a specific one). Parsing "application/x-www.." posts can be done
the same way as parsing GET arguments, and I'm already handling that.
I'm actually working on parsing "multipart/form-data" posts, and -if
you're interested- I can forward the code to you as soon as it's
working.

If you already have this part working I'm interested in it too ;)



On Mon, 2010-11-01 at 15:42 +0300, Franchoze Eric wrote:
> Hi Thibault,
>
> I just started to do filtering POST spam in nginx. As a base I took form-input-nginx-module to get POST and GETs from there. There is no big deal to get requests.
> I'm going to link to external spam filter. And for now there is big qestion is how much filtering posts will slow down hole nginx server. As I understand you are going to do something
> similar so we can sync efforts. It also would be great to take a look at working code.
>
> Thanks,
> Eric.
>
> > ----------------------------------------------------------------------
> >
> > Message: 1
> > Date: Tue, 26 Oct 2010 11:41:39 +0200
> > From: Thibault Koechlin
> > To: nginx-devel@nginx.org
> > Subject: Question about arguments from a GET/POST request
> > Message-ID: <1288086099.2649.116.camel@zeroed.int.nbs-system.com>
> > Content-Type: text/plain; charset="UTF-8"
> >
> > Hi,
> >
> > I have started to write a module which goal is to act in a similar way
> > to "mod_security" in Apache. To keep it short, it will provide
> > applicative filtering, denying some requests if the module think they
> > are evil or contains specific attack signatures. Nginx will be used as a
> > reverse proxy here.
> >
> > So far, I've managed to make a really basic module (based on
> > ngx_http_access_module) that is able to allow or deny a request
> > according to various (extremely simple) pattern matching. I have now to
> > parse the uri, args and post data, to start the "real stuff". When I say
> > "parse", I mean being able to cut down every argument (POST or GET), in
> > order to be able to run regexp (or things like that) on both value and
> > variable name. So this brings me to my question :
> > - Is there, inside the ngx_http_request_t structure (or somewhere else),
> > a "parsed" version of get/post args ?
> > - If not, is there any module that is actually performing this kind of
> > operation ?
> >
> >
> >
> > PS: I've looked to the "ngx_http_variable_value_t *variables;" in the
> > ngx_http_request struct, but it doesn't seem to be that ... On the other
> > hand, some folks on the channel told me that the python interface is
> > able to access those vars, so they must be somewhere ! ;)
> >
> > Best regards,
> >
> >
> >
> >
> >
> >
> > ------------------------------
> >
> > _______________________________________________
> > nginx-devel mailing list
> > nginx-devel@nginx.org
> > http://nginx.org/mailman/listinfo/nginx-devel
> >
> >
> > End of nginx-devel Digest, Vol 12, Issue 15
> > *******************************************
> >
> >
>
> _______________________________________________
> nginx-devel mailing list
> nginx-devel@nginx.org
> http://nginx.org/mailman/listinfo/nginx-devel

--
Thibault Koechlin, IT security senior consultant
---
NBS System - L'Expertise sécurité - 140 Bd Haussmann - 75008 Paris, France
Tel: +33 1 58 56 25 90 / Fax: +33 1 58 56 60 81


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Subject Author Views Posted

Question about arguments from a GET/POST request

Thibault Koechlin 2878 October 26, 2010 03:30PM

Re: Question about arguments from a GET/POST request

Franchoze Eric 825 November 01, 2010 08:44AM

Re: Question about arguments from a GET/POST request

Thibault Koechlin 1121 November 02, 2010 07:18AM



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