使用asio库，实现tr069协议，并给出具体代码

以下是使用ASIO库实现TR-069协议的C++代码示例：

#include <iostream>
#include <memory>
#include <boost/asio.hpp>
#include <boost/format.hpp>
#include <boost/property_tree/ptree.hpp>
#include <boost/property_tree/xml_parser.hpp>

using boost::asio::ip::tcp;

class tr069_client
{
public:
    tr069_client(boost::asio::io_context& io_context, const std::string& host, const std::string& port)
        : io_context_(io_context), socket_(io_context), host_(host), port_(port)
    {
    }

    void connect()
    {
        tcp::resolver resolver(io_context_);
        tcp::resolver::results_type endpoints = resolver.resolve(host_, port_);
        boost::asio::async_connect(socket_, endpoints,
            [this](boost::system::error_code ec, tcp::endpoint)
            {
                if (!ec)
                {
                    std::cout << "Connected to TR-069 server" << std::endl;
                    send_envelope();
                }
                else
                {
                    std::cerr << "Failed to connect to TR-069 server: " << ec.message() << std::endl;
                }
            });
    }

private:
    void send_envelope()
    {
        std::string envelope =
            "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n"
            "<soap:Envelope xmlns:soap=\"http://schemas.xmlsoap.org/soap/envelope/\""
            " xmlns:soapenc=\"http://schemas.xmlsoap.org/soap/encoding/\""
            " xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\""
            " xmlns:xsi=\"http://www.w3.org/2001/XMLSchema-instance\""
            " xmlns:cwmp=\"urn:dslforum-org:cwmp-1-0\">\n"
            "<soap:Header>"
            "<cwmp:ID soap:mustUnderstand=\"1\">1001</cwmp:ID>"
            "<cwmp:HoldRequests soap:mustUnderstand=\"1\">0</cwmp:HoldRequests>"
            "<cwmp:NoMoreRequests soap:mustUnderstand=\"1\">0</cwmp:NoMoreRequests>"
            "</soap:Header>"
            "<soap:Body>"
            "<cwmp:GetParameterNames>"
            "<ParameterPath>Device.</ParameterPath>"
            "<NextLevel>1</NextLevel>"
            "</cwmp:GetParameterNames>"
            "</soap:Body>"
            "</soap:Envelope>\n";

        boost::asio::async_write(socket_, boost::asio::buffer(envelope),
            [this](boost::system::error_code ec, std::size_t length)
            {
                if (!ec)
                {
                    std::cout << "Sent TR-069 envelope" << std::endl;
                    read_response();
                }
                else
                {
                    std::cerr << "Failed to send TR-069 envelope: " << ec.message() << std::endl;
                }
            });
    }

    void read_response()
    {
        boost::asio::async_read_until(socket_, response_, "</soap:Envelope>",
            [this](boost::system::error_code ec, std::size_t length)
            {
                if (!ec)
                {
                    std::cout << "Received TR-069 response" << std::endl;
                    parse_response();
                }
                else
                {
                    std::cerr << "Failed to read TR-069 response: " << ec.message() << std::endl;
                }
            });
    }

    void parse_response()
    {
        std::string response_data((std::istreambuf_iterator<char>(&response_)), std::istreambuf_iterator<char>());
        std::cout << response_data << std::endl;

        boost::property_tree::ptree response_tree;
        std::istringstream response_stream(response_data);
        boost::property_tree::read_xml(response_stream, response_tree);

        std::string status_code = response_tree.get<std::string>("Envelope.Body.GetParameterNamesResponse.Status");
        std::cout << "TR-069 response status code: " << status_code << std::endl;

        io_context_.stop();
    }

private:
    boost::asio::io_context& io_context_;
    tcp::socket socket_;
    boost::asio::streambuf response_;
    std::string host_;
    std::string port_;
};

int main(int argc, char* argv[])
{
    try
    {
        if (argc != 3)
        {
            std::cerr << "Usage: tr069_client <host> <port>" << std::endl;
            return 1;
        }

        boost::asio::io_context io_context;
        tr069_client client(io_context, argv[1], argv[2]);
        client.connect();
        io_context.run();
    }
    catch (std::exception& e)
    {
        std::cerr << "Exception: " << e.what() << std::endl;
    }

    return 0;
}

这个代码使用了ASIO库提供的异步TCP客户端来连接TR-069服务器，并发送一个SOAP请求来获取设备的参数名称。TR-069服务器的响应被读取并解析为XML格式，然后提取响应状态码并打印到控制台上。最后，程序退出。