Hi,

been trying to understand variables for a couple of hours - but I jut don't get 
it.

Can anyone explain, 


1)  How and when the variable setter function is called?

2) Whether I should / can call it myelf to set the variable.

Use Case:

I write an access phase filter that extracts a bunch of information from the 
Authorization header (think OAuth-like: clientId, user,  but maybe also debug 
info about cryptography performance, token expiry, acess ricghts -you get the 
idea).

I would like to store these per request values in a variable to use them in the 
access log module to log them. 

E.g.:

log_format gzip '$remote_addr - $remote_user $my_module_client, 
$my_module_infoxy ...'

I think I understand what I have to do to create the variable (create in 
preconfiguartin handler, provide setter function) 

But how is the setter called and how  do I access the value to store in the 
variable?

Should I make the value a static bucket in the module data that is written per 
request and then copied to the variable in the variable setter???

Existing modules only help a little, as they mostly set variables to values 
that are part of the request struct anyway - which my values aren't.

Jan

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