Update app.py

app.py

@@ -46,7 +46,8 @@ from flask_session import Session  # Capital "S"
 from flask_socketio import SocketIO
 
 app = Flask(__name__)
-socketio = SocketIO(app, cors_allowed_origins="*")
+socketio = SocketIO(app, async_mode="threading")  # Ensure threading mode
+
 prjnamesURL = 'https://docs.google.com/spreadsheets/d/1nsIgi9o9VSBKQlNxbxihPzG_N7s4um0eNVfgL4gaGPc/export?format=csv&gid=0'
 prjpartsURL = 'https://docs.google.com/spreadsheets/d/1nsIgi9o9VSBKQlNxbxihPzG_N7s4um0eNVfgL4gaGPc/export?format=csv&gid=34865056'
 prjsectionsURL = 'https://docs.google.com/spreadsheets/d/1nsIgi9o9VSBKQlNxbxihPzG_N7s4um0eNVfgL4gaGPc/export?format=csv&gid=1751466819'
@@ -77,11 +78,15 @@ def handle_connect():
 def get_project_names():
     socketio.emit("progress", {"data": "10"})
     
-    prjnames, prjids = API.getPrjNames(progress_callback=lambda p: socketio.emit("progress", {"data": p}))
-    
-    socketio.emit("progress", {"data": "80"})
-    socketio.emit("progress", {"data": "100"})
-    socketio.emit("project_data", {"data": [prjnames, prjids]})
+    def fetch_project_names():
+        prjnames, prjids = API.getPrjNames(progress_callback=lambda p: socketio.emit("progress", {"data": p}))
+        
+        socketio.emit("progress", {"data": "80"})
+        socketio.emit("progress", {"data": "100"})
+        socketio.emit("project_data", {"data": [prjnames, prjids]})
+
+    # Run in background to avoid blocking
+    socketio.start_background_task(fetch_project_names)
     
 
 @app.route("/", methods=["GET", "POST"])