You can check any breaking changes here.

• Ensure ServerSocket’s `read_state is read_state::finished once a request is read. Previously this was read_state::empty. Go change your loop to wait while socket.read_state() != read_state::finished.

• Boost requirement raised to 1.66.

• New BOOST_HTTP_SOCKET_DEFAULT_BODY_COPY_THRESHOLD macro.

• Add poly_handler<F> alternative to std::function<F>.

• Rewrite runtime-based polymorphic helpers.

  • Names go from polymorphic_* to poly_*.

  • Use poly_handler<F> instead std::function<F>.

  • Add polymorphic helpers for ClientSocket.

• Add socket::async_{read,write}_chunkext.

• Remove async_read_trailers(). This function added no value.