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Code from Flex 4 Documentation "Using Adobe Flex 4".
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<!-- wrapper/GetURLInfo.mxml -->
<s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"
xmlns:mx="library://ns.adobe.com/flex/mx"
xmlns:s="library://ns.adobe.com/flex/spark" creationComplete="getHostName()">
<s:layout>
<s:VerticalLayout />
</s:layout>
<fx:Script>
import mx.core.FlexGlobals;
[Bindable]
public var g_HostString:String;
[Bindable]
public var g_ContextRoot:String;
[Bindable]
public var g_BaseURL:String;
private function getHostName():void {
g_BaseURL = FlexGlobals.topLevelApplication.url;
var pattern1:RegExp = new RegExp("http://[^/]*/");
if (pattern1.test(g_BaseURL) == true) {
g_HostString = pattern1.exec(g_BaseURL).toString();
} else{
g_HostString = "http://localhost/"
}
}
</fx:Script>
<mx:Form>
<mx:FormItem label="Base URL:">
<mx:Label text="{g_BaseURL}" />
</mx:FormItem>
<mx:FormItem label="Host Name:">
<mx:Label text="{g_HostString}" />
</mx:FormItem>
</mx:Form>
</s:Application>
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