122 lines
3.6 KiB
C++
122 lines
3.6 KiB
C++
//
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// Copyright (c) 2016-2019 Vinnie Falco (vinnie dot falco at gmail dot com)
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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// Official repository: https://github.com/boostorg/beast
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//
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//------------------------------------------------------------------------------
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//
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// Example: WebSocket server, synchronous
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//
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//------------------------------------------------------------------------------
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#include <boost/beast/core.hpp>
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#include <boost/beast/websocket.hpp>
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#include <boost/asio/ip/tcp.hpp>
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#include <cstdlib>
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#include <functional>
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#include <iostream>
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#include <string>
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#include <thread>
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namespace beast = boost::beast; // from <boost/beast.hpp>
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namespace http = beast::http; // from <boost/beast/http.hpp>
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namespace websocket = beast::websocket; // from <boost/beast/websocket.hpp>
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namespace net = boost::asio; // from <boost/asio.hpp>
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using tcp = boost::asio::ip::tcp; // from <boost/asio/ip/tcp.hpp>
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//------------------------------------------------------------------------------
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// Echoes back all received WebSocket messages
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void
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do_session(tcp::socket& socket)
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{
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try
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{
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// Construct the stream by moving in the socket
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websocket::stream<tcp::socket> ws{std::move(socket)};
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// Set a decorator to change the Server of the handshake
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ws.set_option(websocket::stream_base::decorator(
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[](websocket::response_type& res)
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{
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res.set(http::field::server,
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std::string(BOOST_BEAST_VERSION_STRING) +
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" websocket-server-sync");
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}));
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// Accept the websocket handshake
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ws.accept();
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for(;;)
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{
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// This buffer will hold the incoming message
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beast::flat_buffer buffer;
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// Read a message
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ws.read(buffer);
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// Echo the message back
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ws.text(ws.got_text());
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ws.write(buffer.data());
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}
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}
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catch(beast::system_error const& se)
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{
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// This indicates that the session was closed
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if(se.code() != websocket::error::closed)
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std::cerr << "Error: " << se.code().message() << std::endl;
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}
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catch(std::exception const& e)
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{
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std::cerr << "Error: " << e.what() << std::endl;
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}
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}
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//------------------------------------------------------------------------------
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int main(int argc, char* argv[])
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{
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try
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{
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// Check command line arguments.
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if (argc != 3)
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{
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std::cerr <<
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"Usage: websocket-server-sync <address> <port>\n" <<
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"Example:\n" <<
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" websocket-server-sync 0.0.0.0 8080\n";
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return EXIT_FAILURE;
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}
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auto const address = net::ip::make_address(argv[1]);
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auto const port = static_cast<unsigned short>(std::atoi(argv[2]));
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// The io_context is required for all I/O
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net::io_context ioc{1};
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// The acceptor receives incoming connections
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tcp::acceptor acceptor{ioc, {address, port}};
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for(;;)
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{
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// This will receive the new connection
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tcp::socket socket{ioc};
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// Block until we get a connection
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acceptor.accept(socket);
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// Launch the session, transferring ownership of the socket
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std::thread{std::bind(
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&do_session,
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std::move(socket))}.detach();
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}
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}
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catch (const std::exception& e)
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{
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std::cerr << "Error: " << e.what() << std::endl;
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return EXIT_FAILURE;
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}
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}
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