[Zope] How to Use Javascript returns in DTML tags

Thomas B. Passin tpassin@mitretek.org
Thu, 25 Oct 2001 10:48:58 -0400


[Phil Harris]

OK, Phil, it depends on what you are allowing at the browser end.  It takes
a very non-standard extension function in the browser to send xmlrpc, and if
you used it, you could also send any other xml.  But this still doesn't get
the return into the dhtml as the poster asked for.  You could also run a
daemon on your own machine and have the page send a GET with your xml string
to the daemon, which would then send it to Zope using xmlrpc, but I don't
think that counts here, either.

Cheers,

Tom P


> On Tue, 23 Oct 2001 15:15:29 -0400
> "Thomas B. Passin" <tpassin@mitretek.org> wrote:
>
> > [Scheck, Herman]
> >
> > > I am trying to simply use the return (rfqNumber) from a Javascript
script
> > as
> > > a variable in a DTML tag (see code below).  I've also tried placing
the
> > > Javascript code in-line to the DTML, as well as trying to
encapsulating
> > the
> > > script in a DTML method.  None of this seems to work.  Yes, I am
fairly
> > new
> > > to DTML (and Zope, for that matter).  I have seen articles on how to
pass
> > > arguments from DTML to Javascript functions, but not on how to use
> > > Javascript returns in DTML.  Can anyone point, push, or drag me in the
> > right
> > > direction?
> > >
> >
> > It sounds like you think that the browser client can talk to Zope.  No,
it
> > cannot.  The Zope DTML is constructed before the javascript is executed
in
> > the browser, and there is no way for Zope to know about such execution.
> >
> > The only way you can send information from the browser to Zope is by
> > submitting a form and having Zope act on the contents of the form.  You
> > could use javascript to compute values and store them in fields in a
form,
> > but you have to submit it before Zope can learn about it.
> >
> > Clear?
>
> As crystal, *BUT*, what you say is not strictly true :)
>
> For instance take a look at vcXMLRPC, http://www.vcdn.org/Public/XMLRPC,
it's (obviously) an XMLRPC implementation for JavaScript, :).  I use it for
instance when people are editing pages in a wysiwyg editor through the
browser, the save button and, get this, the spell check button are done
through xmlrpc calls back to Zope, the results returned can be anything,
even javascript, which can be eval'ed and therefore affect the currect page,
:)
>