Using HTTP 'GET' Parameters within Orbeon

Hi,

I'm hoping someone can help -

I've looked around and haven't been able to find a working solution for this, so I thought I'd post to the forum to see if anyone can assist.  I'm hoping to be able to pass parameters to the xform when I call the page, so I'd like to be able to do something like this:

http://localhost:8080/orbeon/xforms-get-example/?id=1234&id2=5678

I've found 2 promising looking solutions - although I've not had success getting either of them to work properly and I'm hoping someone can offer some suggestions re: either approach.

1st solution (using Orbeon 3.6) and the Page Flow Controller:

I had a look at the example on the page here:

http://www.orbeon.com/ops/doc/reference-page-flow#url-extraction

And I've edited my page-flow.xml to try and 'pull' those parameters out like this:

    <page path-info="*" view="view.xhtml" default-submission="/resources/test.xml">
        <setvalue ref="/submission/first" parameter="id"/>
        <setvalue ref="/submission/second" parameter="id2"/>
    </page>

And I've created an 'empty' test.xml file like this:

<?xml version="1.0" encoding="UTF-8"?>
<submission>
    <first/>
    <second/>
</submission>

When I call the page, I get no errors - but I'm not sure how I can access those parameters.  The form loads but I'm guessing I need to do something else to make those parameters available?  The only thing I could think of trying was to add test.xml as an instance in the model - but of course all that did was literally just add the contents of the empty file.  Can anyone point me in the right direction regarding what I can try next with this?  Thanks so much.

2nd solution (using the Orbeon 3.7 nightly build):

After a bit more digging, I discovered that Orbeon 3.7 had a new feature called xxforms:get-request-parameter

I grabbed the current nightly build, deployed it, created an instance called 'params' in my page, I saw in the documentation (http://www.orbeon.com/ops/doc/reference-xforms-2) that you could run xxforms:get-request-parameter from the event 'xforms-model-construct-done', so I created this block of code in my model:


        <xf:action ev:event="xforms-model-construct-done">
            <xxforms:script ev:event="DOMActivate">weAreDone();</xxforms:script>
            <!-- This script runs, so I know the event fires successfully -->
            <xf:setvalue ref="instance('params')/one" select="xxforms:get-request-parameter('id')" />
         </xf:action>


Now I tried hardcoding value of the ref with setvalue and that seemed to work just fine, but when I use the select="xxforms:get-request-parameter('id')" all I seem to end up with is an empty closed tag (<one />) in my instance.

Can anyone please offer any advice regarding either of these solutions?  

Thanks so much,
A