boost::asio::io_context 套接字服务器 + thread_group

Question

我正在尝试基于套接字创建一个 https 服务器并将其分发到不同的流中。如果一切都在同一个线程上进行，服务器本身工作正常，可以稳定地保持负载和处理请求。如果我把它放在不同的线程中，那么在负载（wrk）下测试时，服务器崩溃......我的代码：

#include <cstdio>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <sys/socket.h>

#include <boost/thread.hpp>


#include <cstdlib>
#include <iostream>
#include <boost/bind.hpp>
#include <boost/asio.hpp>
#include <boost/asio/ssl.hpp>

#include <iostream>






typedef boost::asio::ssl::stream<boost::asio::ip::tcp::socket> ssl_socket;


class session
{
public:
    session(boost::asio::io_context& io_context,
        boost::asio::ssl::context& context)
        : socket_(io_context, context)
    {
    }

    ssl_socket::lowest_layer_type& socket()
    {
        return socket_.lowest_layer();
    }

    void start()
    {

        socket_.async_handshake(boost::asio::ssl::stream_base::server,
            boost::bind(&session::handle_handshake, this,
                boost::asio::placeholders::error));
    }

    void handle_handshake(const boost::system::error_code& error)
    {
        if (!error)
        {
            socket_.async_read_some(boost::asio::buffer(data_, max_length),
                boost::bind(&session::handle_read, this,
                    boost::asio::placeholders::error,
                    boost::asio::placeholders::bytes_transferred));
        }
        else
        {
            delete this;
        }
    }

    int req_rah = 0;

    void handle_read(const boost::system::error_code& error,
        size_t bytes_transferred)
    {
        if (!error)
        {

        std::string  Result_test = "HTTP/1.1 200 OK\r\n" +
                std::string("Content-Length: 2\r\n") +
                std::string("Content-Type: text/html\r\n") +
                std::string("Connection: Closed\r\n\r\n") +
                std::string("ok") +
                std::string("\r\n");

            boost::asio::streambuf request_test;
            std::ostream request_stream_test(&request_test);

            request_stream_test << Result_test;

            boost::asio::write(socket_, request_test);

            boost::asio::async_write(socket_,
                request_test,
                boost::bind(&session::handle_write, this,
                    boost::asio::placeholders::error));




        }
        else
        {
            delete this;
        }
    }

    void handle_write(const boost::system::error_code& error)
    {
        if (!error)
        {
            socket_.async_read_some(boost::asio::buffer(data_, max_length),
                boost::bind(&session::handle_read, this,
                    boost::asio::placeholders::error,
                    boost::asio::placeholders::bytes_transferred));
        }
        else
        {
            delete this;
        }
    }

private:
    ssl_socket socket_;
    enum { max_length = 6291456 };
    char data_[max_length] = "";
};

class server
{
public:
    server(boost::asio::io_context& io_context, unsigned short port)
        : io_context_(io_context),
        acceptor_(io_context,
            boost::asio::ip::tcp::endpoint(boost::asio::ip::tcp::v4(), port)),
        context_(boost::asio::ssl::context::sslv23)
    {
        context_.set_options(
            boost::asio::ssl::context::default_workarounds
            | boost::asio::ssl::context::no_sslv2
            | boost::asio::ssl::context::single_dh_use);
        context_.set_password_callback(boost::bind(&server::get_password, this));
        context_.use_certificate_chain_file("Server.crt");
        context_.use_private_key_file("Server.key", boost::asio::ssl::context::pem);
        context_.use_tmp_dh_file("dh2048.pem");

        start_accept();
    }

    std::string get_password() const
    {
        return "";
    }

    void start_accept()
    {



        session* new_session = new session(io_context_, context_);
        acceptor_.async_accept(new_session->socket(),
            boost::bind(&server::handle_accept, this, new_session,
                boost::asio::placeholders::error));
    }

    void handle_accept(session* new_session,
        const boost::system::error_code& error)
    {
        if (!error)
        {
            new_session->start();
        }
        else
        {
            delete new_session;
        }

        start_accept();
    }

private:
    boost::asio::io_context& io_context_;
    boost::asio::ip::tcp::acceptor acceptor_;
    boost::asio::ssl::context context_;
};








int main(int argc,      
    char *argv[], 
    char *envp[])
{


    try
    {


        boost::asio::io_context io_context;
        boost::thread_group pool;



        server s(io_context, 8080);


        for (auto i = 0u; i<boost::thread::hardware_concurrency(); ++i)
            pool.create_thread([&] {io_context.run(); });

        pool.join_all();


    }
    catch (std::exception& e)
    {
        std::cerr << "Exception: " << e.what() << "\n";
    }


    return 0;
}

当从浏览器https://127.0.0.1:8080 访问所有规则时，我得到“ok”。执行 wrk 时，一切都崩溃了...据我了解，线程处理不正确（阅读或/和回答），遇到类似任务的人请帮忙，出了什么问题...提前致谢！

Answer 1

我将发送数据更改为

boost::asio::async_write(socket_,
                boost::asio::buffer(send_data.c_str(), send_data.size() + 1),
                boost::bind(&session::handle_write, this,
                    boost::asio::placeholders::error));

现在它可以工作了。但是当我通过 wrk 对其进行测试时，我得到的结果与我在一个线程中加载它时的结果相同。为什么它不更快？...