[Web-SIG] more comments on Paste Deploy

[Sidnei da Silva]

On 3/7/07, Ian Bicking <ianb at colorstudy.com> wrote:
> In theory you can set up Zope 3 using something like:
>
>    [app:main]
>    paste.app_factory = some_function_yet_to_be_written
>
> I thought zope.paste did this, but it's a little wonky now that I look
> at it.

Well, you're probably missing something then, from [1]:

"""
[app:Paste.Main]
paste.app_factory = zope.paste.application:zope_publisher_app_factory
"""

> It seems to basically read INSTANCE_HOME and create a single
> Zope WSGI app, and then kind of minimally plug into it.

It's actually a mixed bag. It looks for INSTANCE_HOME to know where to
find paste.ini. The second thing it does is to help register an
IServerType factory so that you can actually run the WSGI app created
with the included-in-zope3 Twisted WSGI server. I don't recall if it
runs with ZServer too, probably does.

So, to some extent, it wasn't meant to make Zope 3 a WSGI that can be
run anywhere, it was just meant to make it possible to use paste to
compose 'a' WSGI app that uses zope.app.publication that could be run
by Twisted or ZServer.

Now, I'm not saying that it can't evolve into something that makes
Zope 3 run as a WSGI anywhere. It just wasn't the original intent.

[1] http://awkly.org/2006/01/25/zopepaste-wsgi-applications-in-zope-3-using-pastedeploy/

-- 
Sidnei da Silva
Enfold Systems                http://enfoldsystems.com
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