Webware for Python

On 3/18/09, Noragen <noragen@...> wrote:
>
> Hi,
>
> i have two following problems:
>
> *1. problem:*
> I make an import from a python module in a PSPPage.
> In this python i want to have following globals like req and res (request
> and response and perhaps other global stuff i dont remember yet)
>
> from a psp-page i can surely call the script with script(self) to get the
> objects within the script like
> def script(self)
>     self.response().write("anytext")
>     self.request().session.set("sessionparam","blub")
>
> but anyhow it is something like stupid to do it in every function less then
> have this in a global context.
>

Tobias,
If I understand your question correctly you actually don't want a global
contact because then that context would be shared with all other threads
running in the appserver and you'd have requests overwritting that context.
You really want a per thread context (which is per active request).
Since an instance of the Servlet is created for each thread, you can assign
data to the Servlet or your page instance and access it in the methods of
that PSPPage subclass. So within the page "self" is your global context (but
be certain to clear it at the beginning or end of each page to
transaction to avoid accessing stale data in that thread).

Best Regards,
Steve

Hi Tobias,

concerning the first problem, I think Steve is right, the best way is to 
pass "self" around. You can also make the functions methods of the class 
that gets "self" as a parameter when instantiated. But the proper way 
would be to use <%@ page extends="MyPage"%>, where MyPage is a subclass 
of PSPPage, with additional functionality that you need in the 
particular page(s). You can also have multiple base classes or mixins.
I think that's the "Webwarish" way to use PSP.

Another option is using the PSP directive <%@ include ... %> instead of 
importing the file.

By the way, the Page class has some convenience methods: Instead of 
self.response().write(...) you can simply use self.write(...), or 
isntead of self.request().session() you can use self.session(). See:
http://www.w4py.org/WebKit/Docs/Source/Summaries/HTTPContent.html

In the upcoming Webware 1.1 versions, it will also be possible to use 
self.response instead of self.response(). But the old notation will 
continue to work.

Concerning the second problem, you're right - .html files are always 
served as they are, i.e. not parsed by PSP. The extensions that are 
parsed for PSP are returned by PSP.PSPServletFactory.extensions(). I'll 
make this configurable in the next version; for the time being you can 
patch this easily if you like.

Concerning psp-handler, you should probably not use it in this version, 
I'm going to fix a problem here that has just been reported.

-- Christoph