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Protect Your Code

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Submitted on: 1/6/2015 1:38:00 AM
By: dselkirk (from psc cd)  
Level: Intermediate
User Rating: By 3 Users
Compatibility: ASP (Active Server Pages)
Views: 1723
 
     Simple way of preventing access to your client side javascripts and even style sheets

 
				I know that very single web developer has either wanted or has been asked
if they can protect there client side scripts. Now there's an answer, it
quite simply prevents an individual from downloading a HTML pages external
scripts files. 


How it works
Every good developer knows to rename all there script files to the asp extension to protect their asp code. This unforunitely does not protect your client side scripts. The way around it is since we already have our files renamed to asp extensions, why not take advantage of it. All we need to do is implement the response.end statement before the actualy script and nothing will be viewed. The tricky part is to detect whether or not you to allow the page to render. We can do this by performing some simple request.servervariable checks. I create an include file called "validate_view.asp". I simply include the file at the top of each script file. I then call the procedure "validate_view" which is contained in the include file. This will perform the check. I also pass the content type with the procedure to make the page react as it should normally. The procedure then performs some basic checks of where you came from, what domain is being used and a couple others. You can even pass a querystring called page_pass which allows you to view the page from anywhere. You can even customize various parts of the code for your own personal needs.

Download example
[here]

I appreciate any comments or suggestions you may have.


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