Send initial state in a <script type="application/json"> tag (#1806)

app/assets/javascripts/components/containers/mastodon.jsx

@@ -61,8 +61,8 @@ import { hydrateStore } from '../actions/store';
 import createStream from '../stream';
 
 const store = configureStore();
-
-store.dispatch(hydrateStore(window.INITIAL_STATE));
+const initialState = JSON.parse(document.getElementById("initial-state").textContent);
+store.dispatch(hydrateStore(initialState));
 
 const browserHistory = useRouterHistory(createBrowserHistory)({
   basename: '/web'
@@ -95,9 +95,10 @@ const Mastodon = React.createClass({
 
   componentDidMount() {
     const { locale }  = this.props;
+    const streamingAPIBaseURL = store.getState().getIn(['meta', 'streaming_api_base_url']);
     const accessToken = store.getState().getIn(['meta', 'access_token']);
 
-    this.subscription = createStream(accessToken, 'user', {
+    this.subscription = createStream(streamingAPIBaseURL, accessToken, 'user', {
 
       connected () {
         store.dispatch(connectTimeline('home'));