change: handle_interface & write data logic

	modified:   asio_impl/connection.cpp
	modified:   asio_impl/connection.hpp
	modified:   connection_base.hpp
	modified:   handler_interface.hpp
	modified:   http_catch.hpp
	modified:   libevent_impl/connection.cpp
	modified:   libevent_impl/connection.hpp
	modified:   main.cpp