在Boost.Asio中同时使用SSL套接字和非SSL套接字？

问题描述：

我正在将一个库转换为Boost.Asio（到目前为止效果很好），但我遇到了一个关于设计决策的绊脚石。

I'm in the process of converting a library to Boost.Asio (which has worked very well so far), but I've hit something of a stumbling block with regards to a design decision.

Boost.Asio提供对SSL的支持，但 boost :: asio :: ssl :: stream< boost :: asio :: ip :: tcp :: socket> 类型必须用于套接字。我的库有连接到SSL服务器或正常连接的选项，所以我已经做了一个类有这样的两个套接字：

Boost.Asio provides support for SSL, but a boost::asio::ssl::stream<boost::asio::ip::tcp::socket> type must be used for the socket. My library has the option of connecting to SSL servers or connecting normally, so I've made a class with two sockets like this:

class client : public boost::enable_shared_from_this<client>
{
public:
    client(boost::asio::io_service & io_service, boost::asio::ssl::context & context) : socket_(io_service), secureSocket_(io_service, context) {}
private:
    boost::asio::ip::tcp::socket socket_;
    boost::asio::ssl::stream<boost::asio::ip::tcp::socket> secureSocket_;
};

有一堆处理程序引用 socket _ 。（例如，我在几个地方有 socket_.is_open（），需要成为 secureSocket_.lowest_layer（）。is_open（） code>为其他套接字。）

And within there are a bunch of handlers that reference socket_. (For example, I have socket_.is_open() in several places, which would need to become secureSocket_.lowest_layer().is_open() for the other socket.)

任何人都可以提出最好的方法去做这个？我不想为此创建一个单独的类，因为这意味着重复很多代码。

Can anyone suggest the best way to go about this? I'd rather not create a separate class just for this purpose, because that would mean duplicating a lot of code.

编辑：我重述了我的原始问题，因为我误解了OpenSSL函数的目的。

I rephrased my original question because I misunderstood the purpose of an OpenSSL function.

答

有几种方法可以做到这一点。在过去，我做了像

There's a couple of ways you can do this. In the past, I've done something like

if ( sslEnabled )
    boost::asio::async_write( secureSocket_ );
} else {
    boost::asio::async_write( secureSocket_.lowest_layer() );
}

很多 if / else 语句。您还可以创建一个抽象类（伪代码过简化）

Which can get messy pretty quickly with a lot of if/else statements. You could also create an abstract class (pseudo code - oversimplified)

class Socket
{
    public:
       virtual void connect( ... );
       virtual void accept( ... );
       virtual void async_write( ... );
       virtual void async_read( ... );
    private:
        boost::asio::ip::tcp::socket socket_;
};

然后创建一个派生类 SecureSocket 在 secureSocket _ 而不是 socket _ 。我不认为它会重复很多代码，并且它可能比 if / else 更清洁每当你需要 async_read 或 async_write 。

Then create a derived class SecureSocket to operate on a secureSocket_ instead of socket_. I don't think it would be duplicating a lot of code, and it's probably cleaner than if/else whenever you need to async_read or async_write.

在Boost.Asio中同时使用SSL套接字和非SSL套接字？

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