{

// Check command line arguments.

if (argc != 3)

{

std::cerr <<

"Usage: websocket-server-sync <address> <port>\n" <<

"Example:\n" <<

" websocket-server-sync 0.0.0.0 8080\n";

return EXIT_FAILURE;

}

auto const address = net::ip::make_address(argv[1]);

auto const port = static_cast<unsigned short>(std::atoi(argv[2]));

// The io_context is required for all I/O

net::io_context ioc{1};

// The acceptor receives incoming connections

tcp::acceptor acceptor{ioc, {address, port}};

while(true)

{

// This will receive the new connection

tcp::socket socket{ioc};

// Block until we get a connection

acceptor.accept(socket);

// Launch the session, transferring ownership of the socket

auto session = [](tcp::socket socket){

// Construct the stream by moving in the socket

websocket::stream<tcp::socket> ws{std::move(socket)};

// Set a decorator to change the Server of the handshake

ws.set_option(websocket::stream_base::decorator(

[](websocket::response_type& res)

{

res.set(http::field::server,

std::string(BOOST_BEAST_VERSION_STRING) +

" websocket-server-sync");

}));

// Accept the websocket handshake

ws.accept();

while(true)

{

// This buffer will hold the incoming message

beast::flat_buffer buffer;

// Read a message

ws.read(buffer);

// Echo the message back

ws.text(ws.got_text());

ws.write(buffer.data());

}

};

std::thread(session, std::move(socket)).detach();

}