ZeroMQ C#客户端不接收来自C++服务器的消息

Question

我试图将消息从一个服务器发送到多个客户端.我必须在客户端使用C#,在服务器端使用C++.我从http://zguide.zeromq.org/page:all#toc8为服务器提供了示例:

#define within(num) (int) ((float) num * rand () / (RAND_MAX + 1.0))

int main () {

//  Prepare our context and publisher
zmq::context_t context (1);
zmq::socket_t publisher (context, ZMQ_PUB);
publisher.bind("tcp://*:5556");
//publisher.bind("ipc://weather.ipc");

//  Initialize random number generator
srand ((unsigned) time (NULL));
while (1) {

    int zipcode, temperature, relhumidity;

    //  Get values that will fool the boss
    zipcode     = within (100000);
    temperature = within (215) - 80;
    relhumidity = within (50) + 10;

    //  Send message to all subscribers
    zmq::message_t message(20);
    _snprintf ((char *) message.data(), 20 ,
        "%05d %d %d", zipcode, temperature, relhumidity);
    publisher.send(message);

}
return 0;
}

对于客户:

namespace ZMQGuide
{
internal class Program
{
    public static void Main(string[] args) {
        Console.WriteLine("Collecting updates from weather server…");

        // default zipcode is 10001
        string zipcode = "10001 "; // the reason for having a space after 10001 is in case of the message would start with 100012 which we are not interested in

        if (args.Length > 0)
            zipcode = args[1] + " ";

        using (var context = new Context(1))
        {
            using (Socket subscriber = context.Socket(SocketType.SUB))
            {
                subscriber.Subscribe(zipcode, Encoding.Unicode);
                subscriber.Connect("tcp://localhost:5556");

                const int updatesToCollect = 100;
                int totalTemperature = 0;

                for (int updateNumber = 0; updateNumber < updatesToCollect; updateNumber++)
                {
                    string update = subscriber.Recv(Encoding.Unicode);
                    totalTemperature += Convert.ToInt32(update.Split()[1]);
                }

                Console.WriteLine("Average temperature for zipcode {0} was {1}F", zipcode, totalTemperature / updatesToCollect);
            }
        }
    }
}
}

他们不相互沟通.在客户端(C++)我评论了与ipc交互的行,因为在Windows客户端上使用ipc失败了.C# - C#,C++ - 在这种情况下,C++交互正常工作.我用clrzmq 2.2.5.

我将不胜感激任何帮助.

Answer 1

C#客户端使用的是Encoding.Unicode,它是一个2字节的unicode表示(UTF-16).C++服务器使用ASCII.

ZMQ订阅匹配在字节级别上工作,并且不会在字符编码之间进行转换,因此这就是我的问题所在.在C#客户端中切换到Encoding.ASCII或Encoding.UTF8解决了这个问题.