Beast.WebSocket:

Beast.WebSocket provides developers with a robust WebSocket
implementation built on Boost.Asio with a consistent asynchronous
model using a modern C++ approach.

examples/wsproto_echo.cpp

@@ -0,0 +1,53 @@
+//------------------------------------------------------------------------------
+/*
+    This file is part of Beast: https://github.com/vinniefalco/Beast
+    Copyright 2013, Vinnie Falco <vinnie.falco@gmail.com>
+
+    Permission to use, copy, modify, and/or distribute this software for any
+    purpose  with  or without fee is hereby granted, provided that the above
+    copyright notice and this permission notice appear in all copies.
+
+    THE  SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+    WITH  REGARD  TO  THIS  SOFTWARE  INCLUDING  ALL  IMPLIED  WARRANTIES  OF
+    MERCHANTABILITY  AND  FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+    ANY  SPECIAL ,  DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+    WHATSOEVER  RESULTING  FROM  LOSS  OF USE, DATA OR PROFITS, WHETHER IN AN
+    ACTION  OF  CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+    OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+//==============================================================================
+
+#include "wsproto_async_echo_peer.h"
+#include "wsproto_sync_echo_peer.h"
+#include <boost/asio.hpp>
+#include <condition_variable>
+#include <mutex>
+
+int main()
+{
+    using endpoint_type = boost::asio::ip::tcp::endpoint;
+    using address_type = boost::asio::ip::address;
+
+    beast::wsproto::async_echo_peer s1(true, endpoint_type{
+        address_type::from_string("127.0.0.1"), 6000 }, 4);
+
+    beast::wsproto::sync_echo_peer s2(true, endpoint_type{
+        address_type::from_string("127.0.0.1"), 6001 });
+
+    boost::asio::io_service ios;
+    boost::asio::signal_set signals(
+        ios, SIGINT, SIGTERM);
+    std::mutex m;
+    bool stop = false;
+    std::condition_variable cv;
+    signals.async_wait(
+        [&](boost::system::error_code const& ec,
+            int signal_number)
+        {
+            std::lock_guard<std::mutex> lock(m);
+            stop = true;
+            cv.notify_one();
+        });
+    std::unique_lock<std::mutex> lock(m);
+    cv.wait(lock, [&]{ return stop; });
+}