HTTPService's send() method gets response only once

Question

Hi,
I have used HTTPService object to get the xml file from
remote place. Following is the mxml file code
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="
http://www.adobe.com/2006/mxml"
layout="absolute" viewSourceURL="d:/testfolder/index.html">
<mx:Script>
<![CDATA[
import mx.rpc.events.FaultEvent;
import mx.rpc.events.ResultEvent;
// Result handler - gets called after RSS is loaded.
private function dataResultHandler(event:ResultEvent):void
// Fault handler - displays the error
private function dataFaultHandler(event:FaultEvent):void
]]>
</mx:Script>
<mx:HTTPService
id="feedRequest"
url="
http://www.testing.com:8080/my.xml"
result="dataResultHandler(event);"
fault="dataFaultHandler(event);"
useProxy="false"/>
<mx:Panel layout="absolute"
title="External Reference Tag Generation" left="-2"
right="0" bottom="10" top="10">
<mx:TextArea height="292" borderStyle="solid" left="63"
right="62" y="10" toolTip="Generates @ejb.ejb-external-ref tags
using 'LocalHome' import statements of text"
text="{feedRequest.lastResult.niraj.description}" />
<mx:Button label="Submit" id="btnSubmit" left="63"
y="312" click="feedRequest.send();"/>
</mx:Panel>
</mx:Application>
Here, on click of submit button request is send to the given
url "
http://www.testing.com:8080/my.xml"
which returns the xml file of the following format.
my.xml
<?xml version="1.0" encoding="utf-8" ?>
<niraj>
<description>good</description>
</niraj>
So, text area prints 'good'.
After this I change the content of my.xml file to following
<?xml version="1.0" encoding="utf-8" ?>
<niraj>
<description>bad</description>
</niraj>
Still when I press submit button, no matter how many times,
text area shows 'good'. I expect it to change to 'bad' on each
click.
Even I tried to handle the 'result' event of HTTPService
using 'datadataResultHandler()', but here still I see old data is
retrieved.
PS: I have hosted url using Tomcat
http://www.testing.com:8080/my.xml
-Niraj

Answer 1

I believe you witness this behavior in IE browser.
To prevent caching of results returned from HTTP calls I
attach to HTTPService URL's foo variable with random integer value
like that:
changeFolderRequest.url = String(ADD_FOLDER_HTTP_DESTINATION
+ "/" + selectedItemNode.@id + "?foo=" +
Math.round(Math.random()*1000));