workerman 中实现websocket , 为什么不考虑用 socket.io +HTML5 , 而是用 flash + html5

var ws = new WebSocket("ws://example.com:10081/");
  ws.onopen = function() {
    ws.send("Hello");  // Sends a message.
  };
  ws.onmessage = function(e) {
    // Receives a message.
    alert(e.data);
  };
  ws.onclose = function() {
    alert("closed");
  };