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From Jeremy Payne <jp557...@gmail.com>
Subject Re: header_rewrite to modify destination port based on request header
Date Wed, 07 Oct 2015 20:40:52 GMT
Not sure if you are just researching or what.. But this same functionality
is also supported in the lua plugin.

http://trafficserver.readthedocs.org/en/6.0.x/reference/plugins/ts_lua.en.html
ts.client_request.set_url_port

On Wed, Oct 7, 2015 at 12:41 PM, Scott Beardsley <sbeards@yahoo-inc.com>
wrote:

> I'd like to modify the destination port based on an incoming request
> header. It seems like everything I need is available in the header_rewrite
> plugin except the value expansion in the "set-destination port" directive.
> In the docs it says that this expansion only works for add-header[1].
>
> Is there a way to do something like the following via the existing plugin,
> maybe my syntax is wrong?
>
> cond %{READ_REQUEST_HDR_HOOK} [AND]
> cond %{CLIENT-HEADER:NEW-PORT} /^[1-9][0-9]*$/
> set-destination PORT %{CLIENT-HEADER:NEW-PORT} [L]
>
> When I test it I get this debug message: "Would set destination PORT to an
> invalid range, skipping"
>
> Which points me at this code[2]. It looks like the _value variable is set
> to the string "%{CLIENT-HEADER:NEW-PORT}" so I guess there is no
> expansion...
>
> Assuming header_rewrite doesn't support this yet, are there any objections
> to adding this feature?
>
> Thanks,
> Scott
> --
> [1]
> http://trafficserver.readthedocs.org/en/latest/reference/plugins/header_rewrite.en.html?highlight=header_rewrite#variable-expansion
> [2]
> https://git-wip-us.apache.org/repos/asf?p=trafficserver.git;a=blob;f=plugins/header_rewrite/operators.cc;h=5ce75f5985e3e42374814e5a46c361e450bdd779;hb=HEAD#l228
>

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