Hello. I'm newbie for boost library.

I'm trying to write a HTTP Parser, which handles the HTTP message coming from the proxy server.

I don't know much about the boost, so I'm really confused on what to use to write my functionality.

When I search on the internet, some say that I need to used Boost.Asio and Some say Boost.Spirit.

When I looked over the document for each, I found that Boost.Asio is like network library for C++ and Boost.Spirit is for writing compilers. As I mention above, I want to write a http parser. I think the relevant one is the following: https://github.com/joyent/http-parser

Please give me some advice.
Since this is my first posting, I don't know the culture in this mailing list so if I'm doing some mistake in here, please let me know.