Add socketio javascript

app/main/views.py

 from flask import (abort, current_app, flash, redirect, request,
                    render_template, url_for, send_from_directory)
 from flask_login import current_user, login_required
-from ..models import Corpus, User
-from ..tables import AdminUserTable, AdminUserItem
 from . import main
 from .forms import CreateCorpusForm
-from ..decorators import admin_required
-from .. import db
+from .. import db, socketio
+from ..models import Corpus
 import os
 
 
@@ -15,6 +13,12 @@ def index():
     return render_template('main/index.html.j2', title='Opaque')
 
 
+@socketio.on('my event')
+@login_required
+def handle_message(message):
+    print('received message: ' + str(message))
+
+
 @main.route('/corpora/<int:corpus_id>')
 @login_required
 def corpus(corpus_id):

app/templates/base.html.j2

@@ -27,6 +27,13 @@
     <script src="{{ url_for('static', filename='js/jsondiffpatch.umd.js') }}"></script>
     <script src="{{ url_for('static', filename='js/polls.js') }}"></script>
     {% endif %}
+    <script src="{{ url_for('static', filename='js/socket.io.js') }}"></script>
+    <script type="text/javascript" charset="utf-8">
+        var socket = io();
+        socket.on('connect', function() {
+            socket.emit('my event', {data: 'I\'m connected!'});
+        });
+    </script>
     <script src="{{ url_for('static', filename='js/list.min.js') }}"></script>
     <script src="{{ url_for('static', filename='js/utils.js') }}"></script>
     <script src="{{ url_for('static', filename='js/CorpusList.js') }}"></script>