fix 400 errors

app/__init__.py

@@ -177,7 +177,7 @@ def create_app(application):
 
     init_govuk_frontend(application)
     init_jinja(application)
-    socketio.init_app(application)
+    socketio.init_app(application, cors_allowed_origins=['http://localhost:6012'])
 
     for client in (
         csrf,

app/assets/javascripts/activityChart.js

@@ -185,7 +185,7 @@
             return;
         }
 
-        var socket = io();
+        var socket = io("/services");
         var eventType = type === 'service' ? 'fetch_daily_stats' : 'fetch_daily_stats_by_user';
         var socketConnect = type === 'service' ? 'daily_stats_update' : 'daily_stats_by_user_update';
 
@@ -193,6 +193,10 @@
             socket.emit(eventType);
         });
 
+        socket.on('connect_error', function(error) {
+            console.error('WebSocket connection error:', error);
+        });
+
         socket.on(socketConnect, function(data) {
 
             var labels = [];

app/main/views/dashboard.py

@@ -32,7 +32,7 @@ from app.utils.user import user_has_permissions
 from notifications_utils.recipients import format_phone_number_human_readable
 
 
-@socketio.on("fetch_daily_stats")
+@socketio.on("fetch_daily_stats", namespace="/services")
 def handle_fetch_daily_stats():
     service_id = session.get("service_id")
     if service_id:
@@ -45,7 +45,7 @@ def handle_fetch_daily_stats():
         emit("error", {"error": "No service_id provided"})
 
 
-@socketio.on("fetch_daily_stats_by_user")
+@socketio.on("fetch_daily_stats_by_user", namespace="/services")
 def handle_fetch_daily_stats_by_user():
     service_id = session.get("service_id")
     user_id = session.get("user_id")