Implement ActiveX obfuscation for minified dist

[felixge]

Some coporate proxys/firewalls (such as Blue Coat) filter out JS files
that contain the string 'ActiveX' in them. This patch alters the Uglify
AST so that all occurences of the string are obfuscated, making
socket.io work in even the most hostile environments : ).

(This only applies to the minified output)

[rauchg]

Amazing. Thanks for the find
I think we should do this for both builds ?

[felixge]

I think we should do this for both builds ?

I agree, but unfortunately uglify does not preserve whitespace / comments, so it would change the normal distribution file quite a bit.

That being said, if you're ok with pulling in another JS parser (I recommend https://github.com/qfox/ZeParser which is pretty amazing) as a devDependency, I can make the magic happen without altering the shape of the normal distribution build.

--fg

[felixge]

(As discussed with @guille , I'll adjust this patch to also work for the non-minified version)

[3rd-Eden]

Is ActiveX the only thing they filter out?

[felixge]

^-- I just pushed a new patch that moves the active x code into a separate module. It also applies the obfuscation to the regular dist file. The new module also has some tests:

https://github.com/felixge/node-active-x-obfuscator/blob/master/test.js

Would be awesome if this gets merged. Also feel free to squash into one commit if you want.

Is ActiveX the only thing they filter out?

Afaik, yes. At least it is the only thing that was causing problems with socket.io.

[rauchg]

This is wonderful. Thanks @felixge