Awesome Flash tool

April 11th, 2008

My colleague Remco sent me a link of an awesome online audio hardware simulator, pretty impressive!

hobnox

 

Click the image to check it out. 

Filed under Uncategorized | Comment (0)

Simple way to protect your SWF from being ripped

April 7th, 2008

When making a Flash component most of us try to make it as dynamic as possible, often to using XML to configure and feed the application. I personally sell small Flash components on FlashDen that all use XML to get image addresses or global settings. The FlashDen website requires you to submit a preview file to show how the application works, but in most cases this also gives you the key to the product. Although the SWFs are obfuscated, you still can download the XML and the swf, fill the XML with your own data and use it without purchasing the source. In order to prevent this one of the FlashDen member (Alex Pica) wrote a class to check the current domain and returns a false Boolean if the file is not on the right domain. The AS 2.0 class by Alex Pica: 

/**
* @author Alex PICA
* @version 1.0
*
* Class: FlashDenPreviewFileProtection
* Description: I made this class to prevent the theft of the preview files from flashden.net
*/
import mx.utils.CollectionImpl;
import mx.utils.IteratorImpl;
 
class net.alexandrup.common.FlashDenPreviewFileProtection {
 
    //this var will be set to true when compiling preview files
    public static var IsPreviewFile:Boolean = false;
 
    /**
     * Tests if the current SWF file is stolen
     * @return TRUE if it is a stolen swf
     */
    public static function isStolenSWF():Boolean {
        //do not check if this is the fullversion file
        if (IsPreviewFile === false) return false;
 
        var _domain:String = (new LocalConnection()).domain();
        var _allowedDomainList:CollectionImpl = new CollectionImpl();
 
        //------- add here all strings that would have to be found in allowed domain names --------o
        _allowedDomainList.addItem("flashden");
        _allowedDomainList.addItem("localhost");    //add localhost and 127.0.0.1 to be able to run locally
        _allowedDomainList.addItem("127.0.0.1");
        //--------------------------------------------o
 
        var _it:IteratorImpl = IteratorImpl(_allowedDomainList.getIterator());
        while (_it.hasNext()) {
            if (_domain.toLowerCase().indexOf(_it.next().toString().toLowerCase(), 0) > -1) {
                return false;
            }
        }
 
        return true;
    }
 
    //private constructor to prevent instantiation
    private function FlashDenPreviewFileProtection() { };
}
Just copy/paste it and change the package to whatever you like.
 
Usage:
 
net.alexandrup.common.FlashDenPreviewFileProtection.IsPreviewFile = true;
if (!net.alexandrup.common.FlashDenPreviewFileProtection.isStolenSWF()) {
    this.Init();//here is where you initialize your application
} else {
    var txt:TextField = _root.createTextField("err_txt", 1, 0, 0, Stage.width, Stage.height);
    txt.multiline = true;
    txt.textColor = 0xFF0000;
    txt.text = "This file is stolen from www.flashden.net.";
}

AS3 Rewrite by me:

/**
 * @author Boy Carper - Toybot Interactive
 * @version 1.0
 *
 * Class: 			FlashDenPreviewFileProtection
 * Description: 	This is a AS3 rewrite of the original AS2 class by Alex PICA.
 * 					The class prevents the theft of the preview files from flashden.net
 *
 * Usage:			var loader:URLLoader = new URLLoader();
					FlashDenPreviewFileProtection.addAlowedDomain("www.flashden.com");
					FlashDenPreviewFileProtection.addAlowedDomain("flashden.com");
					FlashDenPreviewFileProtection.addAlowedDomain("localhost");
					FlashDenPreviewFileProtection.addAlowedDomain("127.0.0.1");
					if(!FlashDenPreviewFileProtection.isStolenSWF(root)) loader.load(new URLRequest("pathtoyourxml.xml"));
 *
 * */
 
package com.toybot.flashden
{
	public class FlashDenPreviewFileProtection
	{
		private static var _isPreviewFile:Boolean = true;
		private static var _allowedDomains:Array = new Array();
 
		public static function isStolenSWF(_root:Object):Boolean
		{
			var i:int;
			for(i=0;i<_allowedDomains.length;i++)
			{
				if(String(_root.loaderInfo.url).indexOf(_allowedDomains[i])!=-1) return false
			}
			return true;
		}
 
		public static function addAlowedDomain(domain:String):void
		{
			_allowedDomains.push(domain);
		}
    }
}

AS3 File

The examples are focussed on the flashden domain, but can of course be used for any domain.

Filed under Actionscript 3 | Comments (7)