how to receive server sent events in C++?

I want to achieve something like this using C++. Can someone suggest any library or sample code for this?

var source = new EventSource("demo_sse.asp");
      source.onmessage = function(event) {
      document.getElementById("result").innerHTML += event.data + "<br>";
      };
      } else {
      document.getElementById("result").innerHTML = "Sorry, your browser does not support server-sent events...";
     }