Help on Javascript call APEX on demand process

Question

Hi, Guys:
I have a problem needs help: I need to add session protection with checksum for one of my page (page 2); but I have another page (page 1) which displays a Gogle map with a marker with infowindow, in this infowindow there should be a link that leads to my page 2. The problem is: my link needs checksum on demand. So I did the following thing:
#1 add session protection with checksum on page 2.
#2 add two application items requires checksum: CURRENT_URL, URL_WITH_CHECKSUM
#3 add a on demand application process URL_Checksum as follows:
DECLARE
l_url varchar2(2000);
BEGIN
select APEX_UTIL.PREPARE_URL(
p_url => :CURRENT_URL,
p_checksum_type => 'SESSION') into l_url from dual;
:URL_WITH_CHECKSUM:= nvl(l_url,:CURRENT_URL);
htp.prn(:URL_WITH_CHECKSUM);
END;#4 rewrite javascript as follows:
<img src="#WORKSPACE_IMAGES#1938.JPG"\><script type="text/javascript"       src="http://maps.googleapis.com/maps/api/js?sensor=false">     </script>    
<script type="text/javascript">      
function initialize() { 
var myOptions = { zoom: 18, mapTypeId: google.maps.MapTypeId.ROADMAP};  
var map = new google.maps.Map(document.getElementById("map"), myOptions);
var markerBounds = new google.maps.LatLngBounds();
var point=new google.maps.LatLng(&P1_H_MARK_GEOCODING.);
markerBounds.extend(point); 
map.fitBounds(markerBounds);
var listener = google.maps.event.addListener(map, "idle", function() { 
  map.setZoom(map.getZoom()-4); 
  google.maps.event.removeListener(listener); 
var marker;
marker = new google.maps.Marker({ position: new google.maps.LatLng(&P1_H_MARK_GEOCODING.), map: map });
var infowindow = new google.maps.InfoWindow({    content: "&P1_TF_OFFENDER_ID."});
var test_prefix = "http://apex.oracle.com/pls/apex/f?p=";
var current_parameter ="&APP_ID.:2:&SESSION.::NO::P2_H_OFFENDER_ID:"+"&P1_TF_OFFENDER_ID.";
var my_URL=test_prefix +encodeURIComponent(current_parameter);
//alert(my_URL);
//var get = new htmldb_Get(null,$x('pFlowId').value,'APPLICATION_PROCESS=URL_Checksum',PAGE);
//get.add('CURRENT_URL',my_URL);
//gReturn = get.get();
//get = null;
//alert(gReturn);
infowindow.setContent('<a href='+my_URL+'>&P1_TF_OFFENDER_ID.</a>');
google.maps.event.addListener(marker, 'click', function() {  infowindow.open(map,marker);});
</script> Note: I comment the part related to AJAX call and use variable my_URL, as there is a problem: infowindow is no longer available after I uncomment this part and uses gReturn as URL in the infowindow. Could anyone help me on this?
My application on apex.oracle.com:
workspace: LIAPEXTEST
acc: [email protected]
pwd: lxus2000
application ID: 55785 - test AJAX
Thanks a lot!
Sam

Answer 1

Hi, Jari:
I am required to set session protection with checksum required level for one page (offender detail) in my project, as this page displays sensitive information. Ths page will show content depending on offender_id. However, some of offender_ID is NOT open to public. Right now people can easily manuplate URL by changing offender_Id value in URL, so they can see information that is not open to them. That is the reason that I need to add session protection for that page.
However, on the other side, I need to provide Google map for radius search offenders. The infowindow of markers should include link which leads to offender detail page as well. Therefore, I have add checksum for URL in infowindow to let users access offender detail page through link in the infowindow. Otherwise, the link in infowindow won't work.
I thouht about generating URL with checksum on page loading. But there are hundreds of markers that need URL with checksum, I do not know how to pass it into javascript.
Could you give me a suggestion about it?
Thanks for your time.
Sam
Edited by: lxiscas on Aug 26, 2012 12:35 PM