C++ 应用程序使用wss和vue通讯案例

好的，下面是一个简单的C++应用程序使用WebSocket Secure（wss）与Vue进行通信的案例：

1. 首先，需要使用C++ WebSocket库来实现wss通信。可以使用Boost.Asio库中的WebSocket模块来完成此任务。在此之前，请确保已经安装了Boost库。

2. 接下来，需要创建一个WebSocket客户端来连接Vue应用程序的WebSocket服务器。以下是C++代码示例：

#include <boost/asio.hpp>
#include <boost/beast.hpp>
#include <boost/asio/ssl.hpp>
#include <iostream>
#include <string>
#include <cstdlib>
#include <memory>

using tcp = boost::asio::ip::tcp;
namespace ssl = boost::asio::ssl;
namespace http = boost::beast::http;

class websocket_client {
public:
    explicit websocket_client(boost::asio::io_context& ioc, ssl::context& ctx, tcp::resolver::results_type const& endpoints)
        : ioc_(ioc), ws_(boost::asio::make_strand(ioc), ctx), resolver_(ioc), endpoints_(endpoints) {}

    void run(std::string const& host, std::string const& port, std::string const& path) {
        host_ = host;
        port_ = port;
        path_ = path;
        resolver_.async_resolve(host_, port_, std::bind(&websocket_client::on_resolve, shared_from_this(), std::placeholders::_1, std::placeholders::_2));
    }

private:
    void on_resolve(boost::system::error_code ec, tcp::resolver::results_type results) {
        if (ec) {
            std::cerr << "on_resolve: " << ec.message() << std::endl;
            return;
        }
        boost::asio::async_connect(ws_.next_layer(), results.begin(), results.end(), std::bind(&websocket_client::on_connect, shared_from_this(), std::placeholders::_1));
    }

    void on_connect(boost::system::error_code ec) {
        if (ec) {
            std::cerr << "on_connect: " << ec.message() << std::endl;
            return;
        }
        ws_.next_layer().async_handshake(ssl::stream_base::client, std::bind(&websocket_client::on_ssl_handshake, shared_from_this(), std::placeholders::_1));
    }

    void on_ssl_handshake(boost::system::error_code ec) {
        if (ec) {
            std::cerr << "on_ssl_handshake: " << ec.message() << std::endl;
            return;
        }
        ws_.set_option(boost::beast::websocket::stream_base::timeout::suggested(boost::beast::role_type::client));
        ws_.set_option(boost::beast::websocket::stream_base::decorator([](boost::beast::websocket::request_type& req) {
            req.set(http::field::user_agent, std::string(BOOST_BEAST_VERSION_STRING) + " websocket-client-coro");
        }));
        ws_.async_handshake(host_, path_, std::bind(&websocket_client::on_handshake, shared_from_this(), std::placeholders::_1));
    }

    void on_handshake(boost::system::error_code ec) {
        if (ec) {
            std::cerr << "on_handshake: " << ec.message() << std::endl;
            return;
        }
        ws_.async_read(buffer_, std::bind(&websocket_client::on_read, shared_from_this(), std::placeholders::_1, std::placeholders::_2));
    }

    void on_read(boost::system::error_code ec, std::size_t bytes_transferred) {
        if (ec) {
            std::cerr << "on_read: " << ec.message() << std::endl;
            return;
        }
        std::cout << "Received message: " << std::string(buffer_.data(), bytes_transferred) << std::endl;
        buffer_.consume(bytes_transferred);
        ws_.async_read(buffer_, std::bind(&websocket_client::on_read, shared_from_this(), std::placeholders::_1, std::placeholders::_2));
    }

    boost::asio::io_context& ioc_;
    ssl::stream<tcp::socket> ws_;
    tcp::resolver resolver_;
    tcp::resolver::results_type endpoints_;
    std::string host_;
    std::string port_;
    std::string path_;
    boost::beast::flat_buffer buffer_;
};

int main(int argc, char* argv[]) {
    try {
        if (argc != 4) {
            std::cerr << "Usage: websocket-client <host> <port> <path>\n";
            return EXIT_FAILURE;
        }
        boost::asio::io_context ioc;
        ssl::context ctx(ssl::context::tlsv12_client);
        ctx.set_default_verify_paths();
        auto const results = tcp::resolver(ioc).resolve(argv[1], argv[2]);
        websocket_client client(ioc, ctx, results);
        client.run(argv[1], argv[2], argv[3]);
        ioc.run();
    }
    catch (std::exception const& e) {
        std::cerr << "Error: " << e.what() << std::endl;
        return EXIT_FAILURE;
    }
    return EXIT_SUCCESS;
}

3. 在Vue应用程序中，需要使用WebSocket API来创建一个WebSocket服务器，以便C++客户端可以连接。以下是Vue代码示例：

// create a WebSocket server
const WebSocket = require('ws');
const wss = new WebSocket.Server({ port: 8080 });

// listen for connections
wss.on('connection', function connection(ws) {
  console.log('WebSocket client connected');

  // listen for messages from the client
  ws.on('message', function incoming(data) {
    console.log('Received message:', data);

    // send a response back to the client
    ws.send('Hello, client!');
  });

  // listen for disconnections
  ws.on('close', function close() {
    console.log('WebSocket client disconnected');
  });
});

4. 在C++应用程序中，需要编写代码来向Vue服务器发送消息。以下是C++代码示例：

void send_message(std::string const& message) {
    ws_.async_write(boost::asio::buffer(message), [](boost::system::error_code ec, std::size_t bytes_transferred) {
        if (ec) {
            std::cerr << "send_message: " << ec.message() << std::endl;
        }
    });
}

// send a message to the server
send_message("Hello, server!");

以上就是一个简单的C++应用程序使用WebSocket Secure（wss）与Vue进行通信的案例。需要注意的是，此处仅提供了一个基本框架，实际应用中还需要根据具体需求进行修改和优化。