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List:       barracuda
Subject:    Barracuda:  Detecting Client Javascript Enabled
From:       barracuda () enhydra ! org (Christian Cryder)
Date:       2001-11-23 16:21:55
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Hi Kirk,

> I'm assuming that BLinks automatically add the '$csjs' parm
> to the url..but what about included html files and static pages
> referencing pages within the Barracuda framework..
>
> Eg..
> Take a look at the links in CompEx3Footer2.html as an example..
>
> What this means is that, the server needs to determine the capabilities
> again. That's a extra jump/rewrite when navigating from links that's are
not
> blinks...

What _should_ be happening is that right before the page is rendered, we run
through all the links in the page and append on a $csjs=false. This happens
in ScriptDetector.prepareClientResp(), which gets called from
ComponentGateway and DefaultViewHandler. So in theory, it should work
without multiple trips to the server (except for the very first request,
perhaps, which might not have the $csjs param in the link)

Now, when I go here:
http://localhost:8010/Barracuda/tutorial/HelloWorld2?$csjs=true

I'm getting a scripting error (in both IE and NN 6), which means something
is broken there...I'm not sure exactly what the problem is...I'll try and
take a look at it as soon as possible.

> Secondly.....
> I should be able to turn this functinality on and off per application.

You can. There is a RenderStrategy class which can be set on a per component
basis, a per-component hierarchy basis, or on a per application basis. If
you set RenderStrategy to NEVER_SCRIPT, the renderers won't use scripting
even though the client may actually support it. Right now, the only two
strategies are SCRIPT_AS_NEEDED (the default) and NEVER_SCRIPT...if we need
other strategies as well, it should be very easy to add them. If you search
the archives for 'RenderStrategy', I think you'll find a reference to this
which should explain how to use it.

Hope that helps,
Christian
------------------------------------------------
Christian Cryder [christianc@granitepeaks.com]
Barracuda - MVC Component Framework for Webapps
http://barracuda.enhydra.org
------------------------------------------------
        "What a great time to be a Geek"

> -----Original Message-----
> From: barracuda-admin@enhydra.org [mailto:barracuda-admin@enhydra.org]On
> Behalf Of Kirk Daries
> Sent: Thursday, November 01, 2001 11:40 PM
> To: barracuda@enhydra.org
> Subject: RE: Barracuda: Detecting Client Javascript Enabled
>
>
> Hey Christian...
>
> There might only a small problem with this approach..
>
> I'm assuming that BLinks automatically add the '$csjs' parm
> to the url..
> but what about included html files and static pages referencing
> pages within the Barracuda framework..
>
> Eg..
> Take a look at the links in CompEx3Footer2.html as an example..
>
> What this means is that, the server needs to determine the capabilities
> again.
> That's a extra jump/rewrite when navigating from links that's are not
> blinks...
>
> Secondly.....
> I should be able to turn this functinality on and off per application.
> My company has adopted a strict policy of MIE5 for our intranet
> and clients.
> That means, that at the moment... I know what the scripting capabilites
> are....
>
> Well... just a thought...
> Regards
> KD
>
> -----Original Message-----
> From: Christian Cryder [mailto:christianc@enhydra.org]
> Sent: 01 November 2001 06:15
> To: barracuda@enhydra.org
> Subject: RE: Barracuda: Detecting Client Javascript Enabled
>
>
> > Hey Christian, this is a pretty clever idea!
>
> Thanks.  It seems to work pretty well in practice, especially since it
> doesn't require storing info in cookies or session. As far as I know, the
> only other software that actually tells you whether or not Javascript is
> enabled is the BrowserHawk4J package. I'm just glad we were able to figure
> out how to make it work as well ;-)
>
> Christian
> ------------------------------------------------
> Christian Cryder [christianc@enhydra.org]
> Barracuda - MVC Component Framework for Webapps
> http://barracuda.enhydra.org
> ------------------------------------------------
>         "What a great time to be a Geek"
>
> > -----Original Message-----
> > From: barracuda-admin@enhydra.org [mailto:barracuda-admin@enhydra.org]On
> > Behalf Of Jefferson K. French
> > Sent: Friday, October 26, 2001 8:24 PM
> > To: Christian Cryder
> > Subject: Re: Barracuda: Detecting Client Javascript Enabled
> >
> >
> > Hey Christian, this is a pretty clever idea!
> >
> >     Jeff
> >
> > On Mon, 22 Oct 2001, at 15:26:36 [GMT -0600] you wrote:
> >
> > CC> Now, the question arises: How does this marker flag get set? ...
> >
> > _______________________________________________
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> > Barracuda@enhydra.org
> > http://www.enhydra.org/mailman/listinfo.cgi/barracuda
>
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