Issue with portal-html-eventlink and navigation

[Simon Hutchinson <si...@misgl.com>]

Hi,

As part of a portal we are working on I have written a coplet, whose 
initial uri invokes a flow script using the following matcher

<map:match pattern="coplet">
  <map:call function="handleForm">
    <map:parameter name="function" value="assistance"/>
    <map:parameter name="form-definition"
       value="resources/form/assistance.xml"/>
    <map:parameter name="form-definition-2"
        value="resources/form/choosepriority.xml"/>
   </map:call>
   <map:serialize type="xml"/>
</map:match>


The first stage of my flowscript displays a cform until it is valid 
(including some custom validation) before displaying a second form, "page2"

while (true) {
     form.showForm("assistance-display-pipeline");
         if (validatePage1(form)) {
         break;
         }
     }


form2 = new Form(page2);


using the portal-html-eventlink transformer the form action for my 
initial cform "assistance-display-pipeline" is transformed from the 
#{$continuation/id to the correct event link info.

This all works perfectly and the flowscript is re-entered at the correct 
point upon submission, however if I navigate away from the page and then 
go back the events are no longer valid and submission of my form does 
nothing.

Such navigation must be allowed for our implementation.

My approach has been to not use the portal-html-eventlink transformer, 
instead having the form submit for my initial form include the 
continuation id as follows

action="http://localhost:8888/assistance-1c79274d633b7230648d232d4a2c771b16305c6c"

This is then matched in my root sitemap as follows.

<map:match pattern="assistance-*">
       <!-- tell assistance to resume from the continuation -->
       <map:act type="portal-object-model">
         <map:parameter name="copletId" value="Assistance-1"/>
         <map:parameter name="portalName" value="portal"/>
       </map:act>
       <map:act type="portal-set-data">
           <map:parameter name="attributes/touch" value="0"/>
         <map:parameter name="temporaryAttributes/application-uri"
value="cocoon:{global:root}/coplets/assistance/{1}.continue?{request:queryString}"/>
       </map:act>
       <map:redirect-to uri="cocoon://portal"/>

     </map:match>

This tells my coplet to get its data by setting its uri to eventually 
re-enter my flowscript with the correct continuation id.
Please note that I am having to include the queryString from my initial 
form submit as otherwise the request data never makes it back into the flow.

At this point (although not very elegantly) my issue with navigating 
away and invalidating portal events is resolved.

Sorry if all this seems like too much background but I am coming to my 
point.

The problem is that everything works well providing that my form submits 
using a http GET method, as the data from the query string can be 
obtained and appended to the coplet uri ie

cocoon:{global:root}/coplets/assistance/{1}.continue?{request:queryString}

However due to the amount of data that might need to be sent to the 
server I need to use the POST method.
This is where my hack fails as I cant seem to find away to make all this
request data available when my new coplet uri is loaded.
The result has been that although the flowcript is re-entered at the 
correct point,  none of the initial request data (ie the values of my 
cform widgets) is available and therefore

form.showForm("assistance-display-pipeline")

simply displays the empty form with validation errors.


Therefore my problem can be summarised as follows;

I need a way to allow a user to navigate away from page X but
in such a way that when page X is returned to, a form can be submitted
via a POST method such that a flow continuation can be rentered with all 
the POST data available.

does anybody have any suggestions ?

Thanks

SI
 
 
 
 
 
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