Execute Javascript server side

问题:

I was interested in obfuscating my JS code, but I realized arround forums that it is useless. I would like to obfuscate my code anyway. So I was wondering, is that possible to execute JS code on server side (with an app in node.js for example), and just call via Ajax function with context (like dom, or something else), execute on server side, then give back result to page.

It could be very usefull for me, that could permit to just show basic JS functions, but not core of my app...

Perhaps a solution already exists, but I found nothing on Web...

EDIT :

I thought that with node.js, a solution was existing. I meant for example a simple JS function in client side like : call_func('function_name', context); that call a server side JS dispatcher function with ajax, that returns JS object containing results.

Perhaps I am dreaming ? :)

Thanks for your help.

回答1:

You can either rewrite your calculations in PHP or if you need to use them dynamically/get access to the DOM, you can use AJAX to calculate on the server side using PHP and then recieve the ouput of the PHP script without reloading the page.

You can read about AJAX here (I would recommend using jQuery for it as it is much simpler than trying to understand HTTP requests):

http://api.jquery.com/jQuery.ajax/

回答2:

While I agree that you should probably use a serverside language and get the information that you need from the dom via ajax, it is not true that you have to do that. You can simulate a dom on the server using e.g. jsdom which you will find here https://github.com/tmpvar/jsdom for nodejs. Similar packages exist for other languages.

That dispatch thingy you were dreaming about could be achieved using nowjs http://nowjs.com/.

I dont have experience with either tool, so I cannot comment on how well they work.

回答3:

AJAX is the way to go. Send function name in xhr.send('func=myfunc').
First create a dummy div.

<div id="dummy"></div>

Then create a switch case in the js code and call the function:

switch(<?echo $_POST['func'];?>){  
  case 'myfunc':  
    document.getElementById("dummy").innerHTML=myfunc();  
    break;  
}

Then just use xhr.responseText.