Why would you do this, write it in C and let the compiler do the hard work.
I am pretty sure that this was an exercise in practical user space assembly programing rather than an attempt to write yet another http server.
If you need to hit the metal you can inline assembly in both c and c++.
And why isn't that enough?
I wrote a web server in C. I'm not really a web guy, it was a lot of new stuff to me, I'm a pretty amateurish programmer, and it probably doesn't even deserve to be called a "web server". But it was fun, and really cool to know that something that I wrote (with the help/jump-off point of a tutorial or two) can be used to serve web pages to a client. I can run the program, pop open Firefox, and use the browser to click through a set of test pages as though it was being served by a real web server. That's fucking cool, and that was all the reason that I needed to do it.
Don't Reinvent The Wheel - unless you want to!