A simple websocket adapter for ember-js.

ember_websocket_adapter.js

Web.Store = DS.Store.extend();

DS.WebsocketAdapter = DS.RESTAdapter.extend({
  callbacks: {},
  socket: null,
  beforeOpenQueue: [],

  ajax: function(url, type, params) {
    var adapter = this;
    var uuid = adapter.generateUuid();

    adapter.initializeSocket();

    return new Ember.RSVP.Promise(function(resolve, reject) {
      var success = function(json) {
        Ember.run(null, resolve, json);
      };
      var error = function(json) {
        Ember.run(null, reject, json);
      }
      callback = { success: success, error: error }
      adapter.callbacks[uuid] = callback;

      var payload = { uuid: uuid, path: adapter.path(url), type: type, params: params, version: adapter.version || 1 };
      if(adapter.socket.readyState === 1) {
        adapter.socket.send(JSON.stringify(payload));
      }
      else {
        adapter.beforeOpenQueue.push(payload);
      }
    });
  },

  initializeSocket: function() {
    var adapter = this;

    if(adapter.socket === null) {
      adapter.socket = new WebSocket(adapter.host + "/websocket");
      adapter.socket.onopen = function(event) { adapter.open.apply(adapter, [event]); };
      adapter.socket.onmessage = function(event) { adapter.message.apply(adapter, [event]); };
      adapter.socket.onerror = function(event) { adapter.error.apply(adapter, [event]); };
    }
  },

  open: function(event) {
    var adapter = this;

    if(adapter.beforeOpenQueue.length > 0) {
      adapter.beforeOpenQueue.forEach(function(payload) {
        adapter.socket.send(JSON.stringify(payload));
      });
      adapter.beforeOpenQueue = [];
    }
  },

  message: function(event) {
    var adapter = this;
    var result = JSON.parse(event.data);

    adapter.callbacks[result.uuid].success(result.payload);
    delete adapter.callbacks[result.uuid];
  },

  error: function(event) {
    alert(event.data);
  },

  generateUuid: function() {
    var date = new Date().getTime();
    var uuid = "xxxxxxxx-xxxx-4xxx-yxxx-xxxxxxxxxxxx".replace(/[xy]/g, function(character) {
      var random = (date + Math.random() * 16) % 16 | 0;
      date = Math.floor(date/16);
      return (character === "x" ? random : (random & 0x7 | 0x8)).toString(16);
    });
    return uuid;
  },

  path: function(url) {
    return url.replace(this.host, "");
  }
});

Web.ApplicationAdapter = DS.WebsocketAdapter.extend({
  host: "ws://localhost:4000",
  version: 1
});

This gist may be 2 years old, but it gave me some great ideas how to solve my WebSocket based service implementation 👍

@carlwoodward
i would like to use this code in our toolchain. can i relicense it in whatever we need to license it?