[jsr-314-open] data payload for ajax calls

[Dan Allen]

On Sat, May 23, 2009 at 11:52 PM, Jim Driscoll <Jim.Driscoll at sun.com> wrote:

> On 5/23/09 10:46 AM, David Geary wrote:
>
>> The onevent attribute of <f:ajax> can be used to specify a JS function
>> to monitor Ajax calls, which is all well and good. However, the data
>> payload (I'm not sure why we have to refer to it as a payload), seems
>> strange because:
>>
>> 1. data.type is always "event". What's the point of that?!?
>>
>
> Sometimes, it's error.  See the jsf-demo/ajax-queue demo for an example
> that uses this interchangeably.
>
>  2. data.name <http://data.name> is really the status of the Ajax
>> request. Using "name" for the property seems meaningless. Name of what?
>>
>

Honestly, in looking at the demo you cited, I can't possibly resolve why you
would want to use a property called "name". To me, the word "status" wants
to come to mind. I really think you could get away with a single property,
status.

status could be: begin, complete, success, error
Then you have errorCode instead of overloading name. Just get rid of type
and name and use status instead.



>>
> The name of the event.  Or, the name of the error.   The spec lists them -
> there are only a few to choose from.  I'm afraid I don't understand your
> objection.
>
>  3. does it make sense to give the page author acdcess to the actual
>> XMLHttpRequest object via the data payload? data.xhr, for example?
>>
>
> Is your objection that they could modify the object?  Since this is
> JavaScript, they can already modify darn near everything anyway.   We could
> always deliver them a copy of the object, I suppose...


I think David is asking whether it is possible to access the object. It
appears that data is a copy of the properties from the XHR object, not the
object itself. David, do you want the native object?

-Dan

-- 
Dan Allen
Senior Software Engineer, Red Hat | Author of Seam in Action

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