Question

我使用boost创建一个websocket服务器。因为我们需要ws和wss两个版本，所以我写下面的代码。但是当我构建它时，说“错误C2338：async_teardown中的未知套接字类型。”

我想是因为T1。

文件1 iSession.h '''

//
// Created by p00451414 on 2019/5/14.
//

#ifndef ESDK_MSP_ISESSION_H
#define ESDK_MSP_ISESSION_H
#pragma once
#include "stdfax.h"


template<typename T>
class iSession :public std::enable_shared_from_this <iSession<T>> {
public:
    /*explicit
        iSession(boost::asio::ip::tcp::socket);
    explicit
        iSession(boost::asio::ip::tcp::socket, boost::asio::ssl::context&);*/

    iSession() {
        ws_ = NULL;
        strand_ = NULL;
        buffer_ = new boost::beast::multi_buffer();
    }
    ~iSession() {
        delete buffer_;
        buffer_ = NULL;
        delete strand_;
        strand_ = NULL;
        delete ws_;
        ws_ = NULL;

    }

public:
    boost::beast::websocket::stream<T> *ws_=NULL;
    boost::asio::strand<boost::asio::io_context::executor_type> *strand_=NULL;
    boost::beast::multi_buffer *buffer_=NULL;
public:
    void virtual run() = 0;

    void process() {
        auto sp = shared_from_this();

        ws_->async_read(*buffer_, boost::asio::bind_executor(*strand_, [&, sp](boost::system::error_code ec2,
            std::size_t bytes_transferred2) {
            boost::ignore_unused(bytes_transferred2);
            if (ec2) {
                //   fail(ec, "read");
            }


            if (ec2 == boost::beast::websocket::error::closed) {
                return;
            }
            ws_->text(ws_->got_text());
            ws_->async_write(buffer_->data(), boost::asio::bind_executor(*strand_, [&, sp](boost::system::error_code ec3,
                std::size_t bytes_transferred3) {
                boost::ignore_unused(bytes_transferred3);
                if (ec3) {
                    //   return fail(ec, "write");
                }


                // Clear the buffer
                buffer_->consume(buffer_->size());
                process();
            }));

        }));
    }

};


#endif //ESDK_MSP_ISESSION_H

'''

file2 NormalSession.h '''

//
// Created by p00451414 on 2019/5/14.
//

#ifndef ESDK_MSP_NORMALSESSION_H
#define ESDK_MSP_NORMALSESSION_H



#include "iSession.h"

class NormalSession : public iSession<boost::asio::ip::tcp::socket> {
public:
    NormalSession(boost::asio::ip::tcp::socket);

    ~NormalSession();

public:


    void run();
};


#endif //ESDK_MSP_NORMALSESSION_H

'''

文件3 SslSession.h '''

//
// Created by p00451414 on 2019/5/14.
//

#ifndef ESDK_MSP_SSLSESSION_H
#define ESDK_MSP_SSLSESSION_H


#include <memory>
#include <boost/asio/ip/tcp.hpp>


#include "iSession.h"


class SslSession : public iSession<boost::asio::ssl::stream<boost::asio::ip::tcp::socket&>> {
public:
    SslSession(boost::asio::ip::tcp::socket, boost::asio::ssl::context &);

    ~SslSession(void);

public:
    void on_handshake(boost::system::error_code);

    //void on_accept(boost::system::error_code);

    //void do_read();

    //void on_read(boost::system::error_code, std::size_t);

    //void on_write(boost::system::error_code, std::size_t);

    void run();

private:
    boost::asio::ip::tcp::socket* socket_;
};


#endif //ESDK_MSP_SSLSESSION_H

'''

我想这是因为我的SslSession与T1模板有关。因为当SslSession注释时，我的类NormalSession可以运行。

那么如何解决此错误以及如何在模板中使用模板？

更多消息

更多信息

'''

F：\ boost_1_69_0 \ boost_1_69_0 \ boost / beast / websocket / teardown.hpp（103）：错误C2338：async_teardown中的套接字类型未知。 F：\ boost_1_69_0 \ boost_1_69_0 \ boost / beast / websocket / impl / read.ipp（680）：注意：对正在编译的函数模板实例化“ void boost :: beast :: websocket :: async_teardown :: read_some_op>：：mutable_buffers_type，boost :: beast :: websocket :: stream :: read_op> :: process ::，boost :: asio :: strand >>>>（boost :: beast :: websocket :: role_type，Socket＆，TeardownHandler &&）”的引用与 [ NextLayer = boost :: asio :: ssl :: stream， DynamicBuffer = boost :: beast :: multi_buffer，套接字= boost :: asio :: ssl :: stream， TeardownHandler = boost :: beast :: websocket :: stream，true> :: read_some_op> :: mutable_buffers_type，boost :: beast :: websocket :: stream，true> :: read_op> :: process ::，boost :: asio ::链>>> ] F：\ boost_1_69_0 \ boost_1_69_0 \ boost / beast / websocket / impl / read.ipp（173）：注意：编译类模板成员函数“ void boost :: beast :: websocket :: stream :: read_some_op> :: mutable_buffers_type，boost :: beast :: websocket :: stream :: read_op :: process ::，boost :: asio :: strand >>> :: operator（）（boost :: beast :: error_code，size_t，bool）“时与 [ T = boost :: asio :: ssl :: stream， DynamicBuffer = boost :: beast :: multi_buffer ] F：\ boost_1_69_0 \ boost_1_69_0 \ boost / beast / websocket / impl / read.ipp（821）：注意：对正在编译的函数模板实例化“ void boost :: beast :: websocket :: stream :: read_some_op>：：mutable_buffers_type，boost :: beast :: websocket :: stream :: read_op :: process ::，boost :: asio :: strand >>> :: operator（）（boost :: beast :: error_code，size_t，bool） ”的引用与 [ T = boost :: asio :: ssl :: stream， DynamicBuffer = boost :: beast :: multi_buffer ] F：\ boost_1_69_0 \ boost_1_69_0 \ boost / beast / websocket / impl / read.ipp（821）：注意：对正在编译的类模板实例化“ boost :: beast :: websocket :: stream :: read_some_op> :: mutable_buffers_type，boost :: beast :: websocket :: stream :: read_op :: process ::，boost :: asio :: strand >>>“的引用与 [ T = boost :: asio :: ssl :: stream， DynamicBuffer = boost :: beast :: multi_buffer ] F：\ boost_1_69_0 \ boost_1_69_0 \ boost / beast / websocket / impl / read.ipp（802）：注意：编译类模板成员函数“ void boost :: beast :: websocket :: stream :: read_op :: process :: ,, boost :: asio :: strand >> :: operator（）（boost :: beast :: error_code，size_t）“时与 [ T = boost :: asio :: ssl :: stream， DynamicBuffer = boost :: beast :: multi_buffer ] F：\ boost_1_69_0 \ boost_1_69_0 \ boost / beast / websocket / impl / read.ipp（899）：注意：对正在编译的函数模板实例化“ void boost :: beast :: websocket :: stream :: read_op ::: process ::，boost :: asio :: strand >> :: operator（）（boost :: beast :: error_code，size_t）”的引用与 [ T = boost :: asio :: ssl :: stream， DynamicBuffer = boost :: beast :: multi_buffer ] F：\ boost_1_69_0 \ boost_1_69_0 \ boost / beast / websocket / impl / read.ipp（899）：注意：对正在编译的类模板实例化“ boost :: beast :: websocket :: stream :: read_op :: process ::，boost :: asio :: strand >>“的引用与 [ T = boost :: asio :: ssl :: stream， DynamicBuffer = boost :: beast :: multi_buffer ] f：\ msp \ esdk_icp \ source \ esdk_msp \ msp_s \ src \ websocket \ iSession.h（69）：注意：参见对正在编译的函数模板实例化“ void boost :: beast :: websocket :: stream :: async_read :: process ::，boost :: asio :: strand >>（DynamicBuffer＆，ReadHandler &&）”的引用与 [ T = boost :: asio :: ssl :: stream， DynamicBuffer = boost :: beast :: multi_buffer， ReadHandler = boost :: asio :: executor_binder> :: process ::，boost :: asio :: strand> ] f：\ msp \ esdk_icp \ source \ esdk_msp \ msp_s \ src \ websocket \ iSession.h（44）：注意：参见对正在编译的函数模板实例化“ void boost :: beast :: websocket :: stream :: async_read :: process ::，boost :: asio :: strand >>（DynamicBuffer＆，ReadHandler &&）”的引用与 [ T = boost :: asio :: ssl :: stream， DynamicBuffer = boost :: beast :: multi_buffer， ReadHandler = boost :: asio :: executor_binder> :: process ::，boost :: asio :: strand> ] f：\ msp \ esdk_icp \ source \ esdk_msp \ msp_s \ src \ websocket \ iSession.h（41）：注意：编译类模板成员函数“ void iSession> :: process（void）”时 F：\ MSP \ eSDK_ICP \ Source \ eSDK_MSP \ MSP_S \ src \ websocket \ SslSession.cpp（44）：注意：参见对正在编译的函数模板实例化“ void iSession> :: process（void）”的引用 f：\ msp \ esdk_icp \ source \ esdk_msp \ msp_s \ src \ websocket \ SslSession.h（16）：注意：参见对正在编译的类模板实例化“ iSession>”的引用 F：\ boost_1_69_0 \ boost_1_69_0 \ boost / beast / core / string.hpp（103）：注意：参见对正在编译的类模板实例化“ boost :: basic_string_view>”的引用 NMAKE：致命错误U1077：“ D：\ VS2017 \ VC \ Tools \ MSVC \ 14.16.27023 \ bin \ Hostx64 \ x64 \ cl.exe”：返回代码“ 0x2” 停止。 NMAKE：致命错误U1077：“ D：\ VS2017 \ VC \ Tools \ MSVC \ 14.16.27023 \ bin \ Hostx64 \ x64 \ nmake.exe”：返回代码“ 0x2” 停止。 NMAKE：致命错误U1077：“ D：\ VS2017 \ VC \ Tools \ MSVC \ 14.16.27023 \ bin \ Hostx64 \ x64 \ nmake.exe”：返回代码“ 0x2” 停止。 NMAKE：致命错误U1077：“ D：\ VS2017 \ VC \ Tools \ MSVC \ 14.16.27023 \ bin \ Hostx64 \ x64 \ nmake.exe”：返回代码“ 0x2” 停止。

'''

Answer 1

知道了，阅读源代码后，我阅读了teardown.hpp中的注释，忘记了包含#include <boost/beast/websocket/ssl.hpp>。

如何在C ++ 11的模板中使用模板？

1 个答案: