Re: [Webware-discuss] Pycon sprint for WSGIKit: configuration

[Winston W. <win...@ca...>]

That's a great idea.  So simple, yet immensely  flexible.

-winston

On Feb 3, 2005, at 2:17 AM, Eric Radman wrote:

> On 23:09 Tue 01 Feb     , Ian Bicking wrote:
>> BTW, I have written a config parser with WSGIKit in mind, but I
>> haven't plugged it into anything yet.  I described some of the
>> features here: http://blog.ianbicking.org/2005-01-wsgikit-config.html
>
> I don't think we need a configuration parser in the tree at all. The
> easiest and most flexible solution is to simply import * from a .py
> config file. Think of it as a place to define environment variables.
>
> Here's a quick example: TMDA is a mail filter that is is designed to
> work with individual UNIX accounts, but if I want to do virtual e-mail
> hosting I could extend it's delivery logic froms:
>
> DELIVERY = "~/.maildir/"
>
> to:
>
> DELIVERY = "/home/vmail/%s/%s/" % (os.environ["HOST"], 
> os.environ["USER"])
>
> This expanded the functionality of this software not by re-writing or
> subclassing the tmda libraries, but by adding some brains to the
> configuration file itself.
>
>> In some ways it bothers me because it's a bit complicated, but each
>> point of complication is also a feature I think would be really
>> useful, so it's hard to say.
>
> Importing a file like config.py is simple if we think of it as a place
> to define environment variables. The Webware application server is more
> complicated because it lists out the guts of a dictionary. Webware 
> looks
> like this:
>
> {
>    'SessionStore':         'Dynamic', # can be File or Dynamic or 
> Memory
>    'SessionTimeout':             180, # minutes
>    'MaxDynamicMemorySessions': 10000, # maximum sessions in memory
> }
>
> I'm proposing this:
>
> SESSION_STORE='Dynamic'               # can be File or Dynamic or 
> Memory
> SESSION_TIMEOUT=180                   # minutes
> MAX_DYNAMIC_SESSIONS=1000             # maximum sessions in memory
>
> Because this file has a .py extension the user knows the rules of the
> config file because it's python. This means of setting global 
> parameters
> also also allows the user to define any site-specific parameters in the
> same file; such as:
>
> DB_CONN='dbname=mydb user=fog'
>
> --
> Eric Radman
>
>
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_________________________________________
winston wolff - (646) 827-2242 - http://www.stratolab.com - learning by 
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