proxy_set_header inheritance not working?

[Maxim Dounin]

Hello!

On Fri, Apr 11, 2008 at 02:46:51PM +0100, Ed W wrote:

> Maxim Dounin wrote:
>> Hello!
>>
>> On Fri, Apr 11, 2008 at 01:48:12PM +0100, Ed W wrote:
>>
>>> Hi
>>>
>>>> Quoting has nothing to do with variable expansion.  Variable expansion 
>>>> happens unconditionally if it's supported for particular parameter.  
>>>> This is usually documented on per-directive basis.
>>>>
>>>> Please note: quoting supported for directive arguments, but not for 
>>>> complex entities within them.  E.g. the following won't work:
>>>
>>> Is it possible to request variable expansion for log file location? (ie 
>>> easily make it a function of server name).
>>
>> No.
>>
>
> ...Because...? 
> Is it a bad idea?  Hard to implement?  Something else?

Sorry, I misread you question.  The answer was for question "Is it 
currently possible to use variable ...".

Regarding you real question:

It's possible, but:

1. Expanding this for each request will require additional cpu and 
may introduce security issues if improperly used.  Additionally, 
it's IMHO too complicated to work.

2. Expanding this at configuration stage may be a good idea, but 
this isn't really a problem since with small number of vhosts you 
may easily configure this by hand, and with huge number of vhosts 
you probaly anyway generate configs.

Maxim Dounin