How to create a login session in flex?

Question

Hi there,
I have a flex application with two states. One is a "login" state which is a screen with username and password. The other state is "loggedIn" state which is a screen with a small application. As soon as the user credentials are checked from the back end, based on it's success, I'm changing the state to "loggedIn", else there is a message to the user about login failure in "login" state itself.
My problem is if I'm in "loggedIn" state and if I hit refresh button of the webpage(F5), it goes back to the login screen i.e., it just restarts the application..
How can I control this? Is there something like login session which can do the trick?
Appreciate your help...
-Deepak

Answer 1

Flex code:
<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" applicationComplete="getSession.send()">
    <mx:Script>
        <![CDATA[
            import mx.rpc.events.ResultEvent;
            public function getSessionStuff(evt:ResultEvent):void
                saveInfo.text = evt.result.info;
        ]]>
    </mx:Script>
    <mx:HTTPService id="startSession" showBusyCursor="true" method="POST" url="http://localhost/startSession.php">
        <mx:request xmlns="">
            <stuffToSave>
                {saveInfo.text}   
            </stuffToSave>
        </mx:request>
    </mx:HTTPService>
    <mx:HTTPService id="getSession" result="getSessionStuff(event)" showBusyCursor="true" method="POST" url="http://localhost/getSession.php"/>
    <mx:Button x="602" y="323" label="Start Session" enabled="{saveInfo.text != ''}" click="startSession.send()"/>
    <mx:TextInput id="saveInfo" x="563" y="293"/>
</mx:Application>
setSession.php code;
<?php
    session_start();
    $_SESSION['loggedIn'] = $_POST["stuffToSave"];
?>
getSession.php code;
<?php
    session_start();
    if($_SESSION['loggedIn'])
        echo "<info>".$_SESSION['loggedIn']."</info>";
    else
        echo "<info>nothing has been saved</info>";
?>
ta daa