On July 20th, Beast was ACCEPTED into Boost without conditions. Beast is an HTTP and WebSockets protocol library using C++11 and Boost.Asio. The first official release will be in Boost 1.66.0 scheduled for December 2017. In the meanwhile, interested developers can use the develop branch:https://github.com/boostorg/beast
There are a TON of example HTTP and WebSocket clients and servers that anyone can copy and use as the basis of their own robust implementation, check it out:
http://www.boost.org/doc/libs/develop/libs/beast/doc/html/beast/examples.html