lfg

src/managers/session_manager.py

@@ -399,16 +399,24 @@ async def get_session_id(request, session_manager):
     Returns:
         Session ID string
     """
+    # Debug: Log all headers
+    logger.log_message(f"🔍 Request headers: {dict(request.headers)}", level=logging.DEBUG)
+    
     # First try to get from query params
     session_id = request.query_params.get("session_id")
+    logger.log_message(f"🔍 Session ID from query params: {session_id}", level=logging.DEBUG)
     
     # If not in query params, try to get from headers
     if not session_id:
         session_id = request.headers.get("X-Session-ID")
+        logger.log_message(f"🔍 Session ID from headers: {session_id}", level=logging.DEBUG)
     
     # If still not found, generate a new one
     if not session_id:
         session_id = str(uuid.uuid4())
+        logger.log_message(f"⚠️ Generated NEW session ID: {session_id}", level=logging.WARNING)
+    else:
+        logger.log_message(f"✅ Using existing session ID: {session_id}", level=logging.INFO)
     
     # Get or create the session state
     session_state = session_manager.get_session_state(session_id)

src/routes/session_routes.py

@@ -526,10 +526,17 @@ async def preview_csv(app_state = Depends(get_app_state), session_id: str = Depe
             else:
                 description = session_desc
                 
-        # Get rows and convert to dict
+        # Get rows and convert to dict - FIXED: Handle NaN values during JSON serialization
+        # Create a copy of the dataframe for JSON conversion
+        df_for_json = df.head(5).copy()
+        
+        # Replace any remaining NaN/None values with "NaN" string for JSON compatibility
+        df_for_json = df_for_json.fillna("NaN")
+        
+        # Convert to JSON with proper NaN handling
         preview_data = {
             "headers": df.columns.tolist(),
-            "rows": json.loads(df.head(5).to_json(orient="values")),
+            "rows": json.loads(df_for_json.to_json(orient="values")),
             "name": name,
             "description": description
         }