[Zope3-dev] Deploying WSGI Apps with Zope 3.2+

[Jim Fulton]

Sidnei da Silva wrote:
> On Tue, Jan 24, 2006 at 05:15:43PM -0500, Jim Fulton wrote:
> | >Any thoughts?
> | 
> | I think that the way the server and app are integrated needs to be 
> | rethought.
> | 
> | I think we need to look at how to leverage Paste Deploy in Zope.
> | 
> | I hate to mention this with all of the discussion about ZConfig, but we 
> | should
> | probably consider using PasteDeploy as an alternative to ZConfig. (Jim 
> | ducks.)
> | Alternative, we should redo the Zope 3 ZConfig schema to work with the 
> | Paste Deploy
> | APIs. Obviously, if we do the later, I'd prefer to do so after we've 
> | decided how
> | we're going to reimplement ZConfig.
> | 
> | In the short term, you might try teasing out the app and server from Zope
> | and see if you could wire them up with Paste Deploy.
> 
> Alright, I had a first stab at it, and managed to get Zope 3's
> WSGIPublisherApplication wired as a WSGI application using Paste
> Deploy.
> 
> The result of this has been imported into:
> http://svn.zope.org/zope.paste/trunk/
> 
> There are a bunch of issues to be resolved, like the fact that it's
> not possible to access the initial ZConfig options object because it's
> thrown away, so, in order of priority:
> 
> 1. It's not possible to find where the <INSTANCE_HOME> is.

Why is this necessary?

> 2. It's not possible to access the configured root database, I've
>    worked around this by using a event subscriber and some sort of
>    monkeypatching.

In a normal Zope install, the defined databases are registered as utilities.


> 3. Zope's servers assume that all 'IServerType' utilities accept a
>    'db' argument. It should be optional.

This whole mechanism needs to be rethought in light of WSGI and Paste Deploy.

> Other than that, I will be experimenting with hooking additional
> filters to be applied, for example:
> http://www.decafbad.com/2005/07/xmlwiki/lib/xmlwiki/xslfilter.py

Cool.

Jim

-- 
Jim Fulton           mailto:jim at zope.com       Python Powered!
CTO                  (540) 361-1714            http://www.python.org
Zope Corporation     http://www.zope.com       http://www.zope.org