On 2017/1/27 14:38, Cyril Bonté wrote:
> Le 27/01/2017 à 20:11, Ciprian Dorin Craciun a écrit :
>> On Fri, Jan 27, 2017 at 9:01 PM, Cyril Bonté <cyril.bo...@free.fr>
>> wrote:
>>> Instead of using "unique-id-header" and temporary headers, you can
>>> use the
>>> "unique-id" fetch sample [1] :
>>>
>>> frontend public
>>> bind *:80
>>> unique-id-format %{+X}o\ %ci:%cp_%fi:%fp_%Ts_%rt:%pid
>>> default_backend ui
>>>
>>> backend ui
>>> http-request set-header X-Request-Id %[unique-id] unless {
>>> req.hdr(X-Request-Id) -m found }
>>
>>
>> Indeed this might be one version of ensuring that a `X-Request-Id`
>> exists, however it doesn't serve a second purpose
>
> And that's why I didn't reply to your anwser but to the original
> question ;-)
>
Something that might satisfy both requests, why not just append to the
existing request-id?
unique-id-format %[req.hdr(X-Request-ID)],%{+X}o\
%ci:%cp_%fi:%fp_%Ts_%rt:%pid
This does result in a leading comma if X-Request-ID is unset. If that's
unpleasant, you could do something like write tiny LUA sample converter
to append a comma if the value is not empty.
-Patrick
