C++ Boost ASIO：没有匹配的成员函数来调用“write_some”

我想编写一个可以建立安全连接的套接字。写了这段代码：

#pragma once

#include <boost/asio.hpp>
#include <cstdint>
#include <string>

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

class SecureSocket
{
public:
    SecureSocket(boost::asio::io_context ctx, int port, uint32_t encryptionKey = 123);

    int send(const std::string& msg) const;
    int send(const void* msg, std::size_t size);
    int recv(std::string& msg, int length, double timeoutSecs = -1.0) const;
    int recv(void* msg, int length, double timeoutSecs = -1.0) const;

private:
    tcp::socket socket;
    int port;
    std::uint32_t encryptionKey;
    std::string encrypt(const void* message, std::size_t size) const;
    std::string decrypt(const void* message, std::size_t size) const;
};

及实施

#include "secure_socket.h"

SecureSocket::SecureSocket(boost::asio::io_context ctx, int port, uint32_t encryptionKey)
    : socket(ctx, tcp::v4()), port(port), encryptionKey(encryptionKey)
{

}


std::string SecureSocket::encrypt(const void *message, std::size_t size) const
{
    std::string msg;
    std::string encryptedMsg;

    for (int i = 0; i < size; i++)
    {
        msg.push_back(static_cast<const char *>(message)[i]);
    }

    return msg;
}

std::string SecureSocket::decrypt(const void *message, std::size_t size) const
{
    return SecureSocket::encrypt(message, size);
}

int SecureSocket::send(const std::string &msg) const
{
    auto encryptedMsg = encrypt(msg.c_str(), msg.size());
    boost::system::error_code ignoredError;

    return boost::asio::write(socket, boost::asio::buffer(encryptedMsg));
}

但是这段代码无法编译，出现错误

> /home/aoizora/QtCreator/Bot/socket/src/secure_socket.cpp:33: error: no
> matching member function for call to 'write_some' In file included
> from /home/aoizora/QtCreator/Bot/socket/src/secure_socket.cpp:1: In
> file included from
> /home/aoizora/QtCreator/Bot/socket/include/secure_socket.h:3: In file
> included from /usr/include/boost/asio.hpp:43: In file included from
> /usr/include/boost/asio/buffered_stream.hpp:22: In file included from
> /usr/include/boost/asio/buffered_write_stream.hpp:28: In file included
> from /usr/include/boost/asio/write.hpp:1246:
> /usr/include/boost/asio/impl/write.hpp:55:23: error: no matching
> member function for call to 'write_some'
>         tmp.consume(s.write_some(tmp.prepare(max_size), ec));
>                     ~~^~~~~~~~~~ /usr/include/boost/asio/impl/write.hpp:71:18: note: in instantiation
> of function template specialization
> 'boost::asio::detail::write_buffer_sequence<const
> boost::asio::basic_stream_socket<boost::asio::ip::tcp>,
> boost::asio::mutable_buffers_1, const boost::asio::mutable_buffer *,
> boost::asio::detail::transfer_all_t>' requested here   return
> detail::write_buffer_sequence(s, buffers,
>                  ^ /usr/include/boost/asio/impl/write.hpp:83:35: note: in instantiation of function template specialization
> 'boost::asio::write<const
> boost::asio::basic_stream_socket<boost::asio::ip::tcp>,
> boost::asio::mutable_buffers_1, boost::asio::detail::transfer_all_t>'
> requested here   std::size_t bytes_transferred = write(s, buffers,
> transfer_all(), ec);
>                                   ^ /home/aoizora/QtCreator/Bot/socket/src/secure_socket.cpp:33:25: note:
> in instantiation of function template specialization
> 'boost::asio::write<const
> boost::asio::basic_stream_socket<boost::asio::ip::tcp>,
> boost::asio::mutable_buffers_1>' requested here
>     return boost::asio::write(socket, boost::asio::buffer(encryptedMsg));
>                         ^ /usr/include/boost/asio/basic_stream_socket.hpp:803:15: note:
> candidate function template not viable: 'this' argument has type
> 'const boost::asio::basic_stream_socket<boost::asio::ip::tcp>', but
> method is not marked const   std::size_t write_some(const
> ConstBufferSequence& buffers,
>               ^ /usr/include/boost/asio/basic_stream_socket.hpp:777:15: note:
> candidate function template not viable: requires single argument
> 'buffers', but 2 arguments were provided   std::size_t
> write_some(const ConstBufferSequence& buffers)
>               ^

为什么会出错？我似乎一切都做对了。如何修复代码？