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Ô­ÎĵØÖ·£ºhttp://www.flexpasta.com/index.php/2008/03/15/getting-url-parameters-host-name-port-in-flex-actionscript/
package com.flexpasta.utils
{
import flash.external.ExternalInterface;
import mx.core.Application;
import mx.collections.ArrayCollection;
import mx.controls.Alert;


public class HTTPUtil
{
//--------------------------------------------------------------------------
//
// Constructor
//
//--------------------------------------------------------------------------
/**
* @private
*/
public function HTTPUtil()
{
super();
}

/**
* Returns the current url that the swf player lives in
*
*/
public static function getUrl():String
{
return ExternalInterface.call("window.location.href.toString");
}

/**
* Returns the current host name.
* example: http://www.flexpasta.com/?x=1&y=2 would return www.flexpasta.com
*/
public static function getHostName():String
{
return ExternalInterface.call("window.location.hostname.toString");
}

/**
* Returns the current protocol, such as http:, https:, etc
*
*/
public static function getProtocol():String
{
return ExternalInterface.call("window.location.protocol.toString");
}

/**
* Gets the current port for the url
*/
public static function getPort():String
{
return ExternalInterface.call("window.location.port.toString");
}

/**
* Gets the context following the base of the url
* Example http://www.flexpasta.com/test?x=1&y=2 would return /test
*/
public static function getContext():String
{
return ExternalInterface.call("window.location.pathname.toString");