Hi,
I have enough experience in C++ and networking, to develop for you a HTTP/HTTPS proxy (Needs also to use compression).
Did you mean by executing JS in the browser, is to include JS into HTML, and then send it back to the client ?
For example Client A request a page from HTTP Server B;
B return HTML page like <HTML>Server B HTML page</HTML>;
But you want the client A gets :
<HTML><script src='node.js'/>Server B HTML page</HTML>
It will be nice to not develop the application from scratch, but use an open source HTTP proxy, and then make the necessary modifications on it.
Best Regards,
Marouane