How to *not* return a page

[Derek Hohls <dh...@csir.co.za>]

Is it possible to configure a match pattern to *not* 
return a page; i.e. I would like to make a call that
will only set a variable (e.g. session value) - most
probably via Javascript call in a certain page; the
script should then continue to run & any or may
not make another Cocoon call to display the actual
page.
 
I think this might be possible with flow script, but I
have the impression flow must end with a call to
a sendPage function?
 
Any clues or pointers would help.
 
Thanks
Derek


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Re: How to *not* return a page

[Mark Lundquist <ml...@wrinkledog.com>]

On Sep 26, 2005, at 11:21 PM, Derek Hohls wrote:

> Is it possible to configure a match pattern to *not*
> return a page; i.e. I would like to make a call that
> will only set a variable (e.g. session value) - most
> probably via Javascript call in a certain page; the
> script should then continue to run & any or may
> not make another Cocoon call to display the actual
> page.

Can you clarify the "may or may not" part there?  In particular, what 
does "may not" look like?  The client has issued a request, and there 
must be a response.  So if Cocoon doesn't generate that response, where 
does it come from?

>
> I think this might be possible with flow script, but I
> have the impression flow must end with a call to
> a sendPage function?

One way or another, yes.  But of course that doesn't necessarily have 
to happen directly within the flowscript function called by the 
sitemap, in just has to eventually happen in the call chain.

—ml—


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Re: How to *not* return a page

[Leszek Gawron <lg...@mobilebox.pl>]

Derek Hohls wrote:
> Is it possible to configure a match pattern to *not* 
> return a page; i.e. I would like to make a call that
> will only set a variable (e.g. session value) - most
> probably via Javascript call in a certain page; the
> script should then continue to run & any or may
> not make another Cocoon call to display the actual
> page.
>  
> I think this might be possible with flow script, but I
> have the impression flow must end with a call to
> a sendPage function?
You are right. Flow mandates the used of cocoon.sendPage*.

One quick solution though: Implement an action and then:


<map:actions>
   <map:action src="o.a.c.acting.MyAction" name="myaction"/>
</map:actions>

<.../>

<map:pipeline>
   <map:act type="myaction"/>
   <map:match .../>
   <map:match .../>
</map:pipeline>

myaction will be called before every match so it works much like a 
function call (no pipeline side effects). If you want your matches to 
work only if action succeed do it like this:

<map:pipeline>
   <map:act type="myaction">
     <map:match .../>
     <map:match .../>
   </map:act>
   <map:match ...when action failed.../>
</map:pipeline>

-- 
Leszek Gawron                                      lgawron@mobilebox.pl
IT Manager                                         MobileBox sp. z o.o.
+48 (61) 855 06 67                              http://www.mobilebox.pl
mobile: +48 (501) 720 812                       fax: +48 (61) 853 29 65

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