在 boost::asio 中发送/接收一个结构体-C/C++问题

sending/receiving a struct in boost::asio(在 boost::asio 中发送/接收一个结构体)

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问题描述

我打算使用 boost::asio::async_write_some 从客户端向服务器发送一个结构体，在本例中为 boost::serialization 和 boost::property_tree 来帮忙，

I was going to send a struct from a client to a server using boost::asio::async_write_some, in this case boost::serialization and boost::property_tree come to help,

//boost::serialization
struct blank
{
    int m_id;
    std::string m_message;

    template<typename archive>
    void serialize(archive& ar, const short version)
    {
        ar & m_id;
        ar & m_message;
    }
};

blank info;

info.m_id = 1;
info.m_name = "Rasul";

std::stringstream ss;
boost::archive::binary_oarchive out_archive(ss);

out_archive << info;

那么，现在我如何使用 boost::asio 异步发送/接收 out_archive .. 或

So, now how can I send/receive out_archive using boost::asio asynchronously .. or

//boost::property_tree
boost::property_tree::ptree root;
root.put("id", 2);
root.put("name", "Rasul");

如何使用 boost::asio 异步发送/接收根????(如果您有其他想法，请分享)

How can I send/receive root using boost::asio asynchronously??? (If you have some other ideas please share them)

推荐答案

好吧，完全不清楚您尝试了什么或问题是什么，所以您开始吧:

Ok, it's not clear at all what you've tried or what the problem is, so here you go:

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#include <boost/archive/binary_oarchive.hpp> #include <boost/serialization/serialization.hpp> #include <boost/asio.hpp> #include <iostream> //boost::serialization struct blank { int m_id; std::string m_message; template<typename archive> void serialize(archive& ar, const unsigned /*version*/) { ar & m_id; ar & m_message; } }; void on_send_completed(boost::system::error_code ec, size_t bytes_transferred) { if (ec) std::cout << "Send failed: " << ec.message() << " "; else std::cout << "Send succesful (" << bytes_transferred << " bytes) "; } namespace ba = boost::asio; using ba::ip::tcp; struct IO { boost::asio::streambuf buf; void send_asynchronously(tcp::socket& socket) { blank info; info.m_id = 1; info.m_message = "Rasul"; { std::ostream os(&buf); boost::archive::binary_oarchive out_archive(os); out_archive << info; } async_write(socket, buf, on_send_completed); } }; int main() { ba::io_service ios; tcp::socket s(ios); s.connect({{},6868}); IO io; io.send_asynchronously(s); ios.run(); }

当针对例如运行时netcat -l -p 6868 |xxd:

Send succesful (62 bytes) 00000000: 1600 0000 0000 0000 7365 7269 616c 697a ........serializ 00000010: 6174 696f 6e3a 3a61 7263 6869 7665 0f00 ation::archive.. 00000020: 0408 0408 0100 0000 0000 0000 0001 0000 ................ 00000030: 0005 0000 0000 0000 0052 6173 756c .........Rasul

Boost 属性树 + 序列化
一些变化:

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void send_asynchronously(tcp::socket& socket) { boost::property_tree::ptree root; root.put("id", 2); root.put("name", "Rasul"); { std::ostream os(&buf); boost::archive::binary_oarchive out_archive(os); out_archive << root; } async_write(socket, buf, on_send_completed); }

打印:

Send succesful (138 bytes) 00000000: 1600 0000 0000 0000 7365 7269 616c 697a ........serializ 00000010: 6174 696f 6e3a 3a61 7263 6869 7665 0f00 ation::archive.. 00000020: 0408 0408 0100 0000 0000 0000 0002 0000 ................ 00000030: 0000 0000 0000 0000 0000 0000 0000 0200 ................ 00000040: 0000 0000 0000 6964 0000 0000 0000 0000 ......id........ 00000050: 0000 0000 0100 0000 0000 0000 3204 0000 ............2... 00000060: 0000 0000 006e 616d 6500 0000 0000 0000 .....name....... 00000070: 0000 0000 0005 0000 0000 0000 0052 6173 .............Ras 00000080: 756c 0000 0000 0000 0000 ul........

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