由于你的平均堆栈上，在节点标准的建议是使用的 Socket.IO API。

Since you're on the MEAN stack, the standard recommendation in Node would be to use the Socket.IO API.

他们提供了双向通信的下面的例子（这将有利于您的推送消息很容易）：

They provide the following example of two way messaging (which would facilitate your push messages very easily):

客户端

<script src="/socket.io/socket.io.js"></script>
<script>
  var socket = io.connect('http://localhost');
  socket.on('news', function (data) {
    console.log(data);
    socket.emit('my other event', { my: 'data' });
  });
</script>

服务器

var app = require('http').createServer(handler)
  , io = require('socket.io').listen(app)
  , fs = require('fs')

app.listen(80);

function handler (req, res) {
  fs.readFile(__dirname + '/index.html',
  function (err, data) {
    if (err) {
      res.writeHead(500);
      return res.end('Error loading index.html');
    }

    res.writeHead(200);
    res.end(data);
  });
}

io.sockets.on('connection', function (socket) {
  socket.emit('news', { hello: 'world' });
  socket.on('my other event', function (data) {
    console.log(data);
  });
});

它会使用WebSockets在可能的情况，并退回到AJAX长轮询或Flash轮询在浏览器中在没有WebSocket的支持。

It will use websockets where possible, and fallback to AJAX long polling or Flash polling in browsers where there is no websocket support.

至于有角整合，这里的一对 Socket.IO和角：

As for integrating with Angular, here's a good blog post on Socket.IO and Angular:

我会写关于如何整合Socket.IO添加实时
  功能到AngularJS应用。在本教程中，我将
  通过写一个即时消息应用程序走。

I'll be writing about how to integrate Socket.IO to add real-time features to an AngularJS application. In this tutorial, I'm going to walk through writing a instant messaging app.