123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121 |
- //
- // Copyright (c) 2016-2019 Vinnie Falco (vinnie dot falco at gmail dot com)
- //
- // Distributed under the Boost Software License, Version 1.0. (See accompanying
- // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
- //
- // Official repository: https://github.com/boostorg/beast
- //
- //------------------------------------------------------------------------------
- //
- // Example: WebSocket server, synchronous
- //
- //------------------------------------------------------------------------------
- #include <boost/beast/core.hpp>
- #include <boost/beast/websocket.hpp>
- #include <boost/asio/ip/tcp.hpp>
- #include <cstdlib>
- #include <functional>
- #include <iostream>
- #include <string>
- #include <thread>
- namespace beast = boost::beast; // from <boost/beast.hpp>
- namespace http = beast::http; // from <boost/beast/http.hpp>
- namespace websocket = beast::websocket; // from <boost/beast/websocket.hpp>
- namespace net = boost::asio; // from <boost/asio.hpp>
- using tcp = boost::asio::ip::tcp; // from <boost/asio/ip/tcp.hpp>
- //------------------------------------------------------------------------------
- // Echoes back all received WebSocket messages
- void
- do_session(tcp::socket& socket)
- {
- try
- {
- // 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();
- for(;;)
- {
- // 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());
- }
- }
- catch(beast::system_error const& se)
- {
- // This indicates that the session was closed
- if(se.code() != websocket::error::closed)
- std::cerr << "Error: " << se.code().message() << std::endl;
- }
- catch(std::exception const& e)
- {
- std::cerr << "Error: " << e.what() << std::endl;
- }
- }
- //------------------------------------------------------------------------------
- int main(int argc, char* argv[])
- {
- try
- {
- // 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}};
- for(;;)
- {
- // 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
- std::thread{std::bind(
- &do_session,
- std::move(socket))}.detach();
- }
- }
- catch (const std::exception& e)
- {
- std::cerr << "Error: " << e.what() << std::endl;
- return EXIT_FAILURE;
- }
- }
|