Hello!

On Fri, Oct 25, 2013 at 12:30:34PM +0200, Jan Algermissen wrote:

> Hi,
>
> I am writing a module that needs to add/change the HTTP
> Authorization server for an upstream request.
>
> Since I am using a signature based authentication scheme where
> the signature base string includes the request host and port the
> header can only be added *after* the upstream module has
> determined which server to send the request to (e.g. after
> applying round-robin).
>
> Is it possible to hook my module into that 'phase' and if so -
> what is the preferred way to do that?
>
> I saw that I at least can access the target host and port set by
> the proxy module by reading the proxy module variables. However,
> that (of course) does only give the server group name to be used
> by the upstream module in the next step.

A request to an upstream is created once, before a particular
server is known, and the same request is used for requests to all
upstream servers. That is, what you are trying to do isn't
something currently possible.

--
Maxim Dounin
http://nginx.org/en/donation.html

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