libwebsocketpp-dev 0.7.0-11 (amd64 binary) in ubuntu bionic

 WebSocket++ is a header only C++ library that implements RFC6455 The WebSocket
 Protocol. It allows integrating WebSocket client and server functionality into
 C++ programs. It uses interchangeable network transport modules including one
 based on C++ iostreams and one based on Boost Asio.
 .
 Major Features:
  * Full support for RFC6455
  * Partial support for Hixie 76 / Hybi 00, 07-17 draft specs (server only)
  * Message/event based interface
  * Supports secure WebSockets (TLS), IPv6, and explicit proxies.
  * Flexible dependency management (C++11 Standard Library or Boost)
  * Interchangeable network transport modules (iostream and Boost Asio)
  * Portable/cross platform (Posix/Windows, 32/64bit, Intel/ARM/PPC)
  * Thread-safe
 .
 This package contains the header files.