![](/img/trans.png)
[英]Unable to pass std::function into boost::asio async_accept handler
[英]boost::asio::async_accept the handler is not called
以 boost https://www.boost.org/doc/libs/1_70_0/doc/html/boost_asio/example/cpp11/ssl/server.cpp為例
就像組裝一樣,它開始工作了。 然后從接口取實現到SSL_Server.h,SSL_Server.cpp,Session.h,Session.cpp,main把它帶到了Serv.cpp,結果handler沒有被調用!! 我不明白是什么原因。
SSL_Server.h
#ifndef SSL_SERVER
#define SSL_SERVER
#define BOOST_ASIO_ENABLE_HANDLER_TRACKING
#include "Session.h"
#include <functional>
#include <iostream>
#include <boost/asio.hpp>
#include <boost/asio/ssl.hpp>
using boost::asio::ip::tcp;
class SSL_Server
{
public:
SSL_Server(boost::asio::io_context& io_context, unsigned short port);
private:
void do_accept();
std::string get_password() const;
private:
tcp::acceptor acceptor_;
boost::asio::ssl::context context_;
};
#endif
SSL_Server.cpp
#include "Server_SSL.h"
SSL_Server::SSL_Server(boost::asio::io_context& io_context, unsigned short port)
: acceptor_(io_context, tcp::endpoint(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(std::bind(&SSL_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");
do_accept();
}
std::string SSL_Server::get_password() const
{
return "test";
}
void SSL_Server::do_accept()
{
acceptor_.async_accept([this](const boost::system::error_code& error, tcp::socket socket)
{
if (!error)
{
std::make_shared<session>(std::move(socket), context_)->start();
}
});
}
Session.h
#ifndef SESSION
#define SESSION
#include <iostream>
#include <boost/asio.hpp>
#include <boost/asio/ssl.hpp>
using boost::asio::ip::tcp;
class session : public std::enable_shared_from_this<session>
{
public:
session(tcp::socket socket, boost::asio::ssl::context& context);
void start();
private:
void do_handshake();
void do_read();
void do_write(std::size_t length);
private:
boost::asio::ssl::stream<tcp::socket> socket_;
char data_[1024];
};
#endif
Session.cpp
#include "Session.h"
session::session(tcp::socket socket, boost::asio::ssl::context& context)
: socket_(std::move(socket), context)
{
}
void session::start()
{
do_handshake();
}
void session::do_handshake()
{
auto self(shared_from_this());
socket_.async_handshake(boost::asio::ssl::stream_base::server,
[this, self](const boost::system::error_code& error)
{
if (!error)
{
do_read();
}
});
}
void session::do_read()
{
auto self(shared_from_this());
socket_.async_read_some(boost::asio::buffer(data_),
[this, self](const boost::system::error_code& ec, std::size_t length)
{
if (!ec)
{
do_write(length);
}
});
}
void session::do_write(std::size_t length)
{
auto self(shared_from_this());
boost::asio::async_write(socket_, boost::asio::buffer(data_, length),
[this, self](const boost::system::error_code& ec,
std::size_t /*length*/)
{
if (!ec)
{
do_read();
}
});
}
服務端
#include "Server_SSL.h"
int main(int argc, char* argv[])
{
if (argc != 2)
{
std::cerr << "Usage: server <port>\n";
return 1;
}
boost::asio::io_context io_context;
SSL_Server s(io_context, 3333);
io_context.run();
return 0;
}
我看不出代碼有什么問題。 事實上,它對我有用。 但是,您需要工作目錄中存在的證書、密鑰和 DH 參數文件。
我沒有看到很多明確的錯誤處理,所以我想這可能是您的問題:
context_.use_certificate_chain_file("server.crt", ec);
if (ec) throw boost::system::system_error(ec);
context_.use_private_key_file("server.key", boost::asio::ssl::context::pem, ec);
if (ec) throw boost::system::system_error(ec);
context_.use_tmp_dh_file("dh2048.pem", ec);
if (ec) throw boost::system::system_error(ec);
我使用了 boost 示例中的 server.pem 和 dh2048.pem 文件,所以它變成了
context_.use_certificate_chain_file("server.pem", ec);
if (ec) throw boost::system::system_error(ec);
context_.use_private_key_file("server.pem", boost::asio::ssl::context::pem, ec);
if (ec) throw boost::system::system_error(ec);
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.