Preventing access to .js files

[Neeraj Vij]

How can I prevent the user from downloading my javascript file in web application deployed in tomcat.

many thanks
neeraj.

[Lester Burnham]

You can't. If the browser can access .js files, then so can the user directly. What are you trying to achieve?

[Neeraj Vij]

I want to encrypt the request parameters before submitting the request and I don't want the user being able to view the method used for encryption in the .js file.

Many Thanks
Neeraj.

[Lester Burnham]

As I said, impossible (and not a god idea to begin with). If you want encrypted communication, why not use HTTPS?

[Tim Holloway]

JavaScript files run on the client, therefore the client has to be supplied with copies of them, therefore they MUST be downloadable. Q.E.D.

You're also providing yet another example of why people shouldn't try to invent their own security systems. Security is NOT an "All You Have To Do Is..." operation. It's complex, it's difficult, it requires a lot of knowledge, and even professionally-designed systems periodically turn up exploitable. Most "clever amateur" systems can't stand 5 minutes in the sun. So we recommend that you learn to use the existing frameworks and channels rather than try and invent something.