Function main

example/websocket/client/coro-ssl/websocket_client_coro_ssl.cpp:145–198

//------------------------------------------------------------------------------

int main(int argc, char** argv)
{
    // Check command line arguments.
    if(argc != 4)
    {
        std::cerr <<
            "Usage: websocket-client-coro-ssl <host> <port> <text>\n" <<
            "Example:\n" <<
            "    websocket-client-coro-ssl echo.websocket.org 443 \"Hello, world!\"\n";
        return EXIT_FAILURE;
    }
    auto const host = argv[1];
    auto const port = argv[2];
    auto const text = argv[3];

    // The io_context is required for all I/O
    net::io_context ioc;

    // The SSL context is required, and holds certificates
    ssl::context ctx{ssl::context::tlsv12_client};

    // Verify the remote server's certificate
    ctx.set_verify_mode(ssl::verify_peer);

    // This holds the root certificate used for verification
    load_root_certificates(ctx);

    // Launch the asynchronous operation
    boost::asio::spawn(ioc, std::bind(
        &do_session,
        std::string(host),
        std::string(port),
        std::string(text),
        std::ref(ioc),
        std::ref(ctx),
        std::placeholders::_1),
            // on completion, spawn will call this function
           [](std::exception_ptr ex)
           {
               // if an exception occurred in the coroutine,
               // it's something critical, e.g. out of memory
               // we capture normal errors in the ec
               // so we just rethrow the exception here,
               // which will cause `ioc.run()` to throw
               if (ex)
                   std::rethrow_exception(ex);
           });

    // Run the I/O service. The call will return when
    // the socket is closed.
    ioc.run();

    return EXIT_SUCCESS;
}