Update app.py

app.py

@@ -2,13 +2,22 @@
 from flask import Flask, send_from_directory, jsonify, request
 import os
 import json
+import errno
 
 app = Flask(__name__)
 
 # Directory to store settings
 SETTINGS_DIR = "settings"
-if not os.path.exists(SETTINGS_DIR):
-    os.makedirs(SETTINGS_DIR)
+
+# Ensure the settings directory exists and has the correct permissions
+try:
+    if not os.path.exists(SETTINGS_DIR):
+        os.makedirs(SETTINGS_DIR, mode=0o775)
+    # Attempt to set permissions (may fail if user lacks privileges, but directory should already be created with correct permissions in Dockerfile)
+    os.chmod(SETTINGS_DIR, 0o775)
+except OSError as e:
+    # Log the error (in a production environment, you'd use proper logging)
+    print(f"Error setting up settings directory: {e}")
 
 # Real-world simulation parameters (unscaled)
 simulation_params = {
@@ -63,8 +72,10 @@ def save_settings():
         with open(filename, 'w') as f:
             json.dump(simulation_params, f, indent=4)
         return jsonify({"status": "success", "message": "Settings saved successfully"})
+    except PermissionError as e:
+        return jsonify({"status": "error", "message": "Permission denied: Unable to save settings. Please check directory permissions."}), 500
     except Exception as e:
-        return jsonify({"status": "error", "message": str(e)}), 500
+        return jsonify({"status": "error", "message": f"Error saving settings: {str(e)}"}), 500
 
 # API to load settings from a JSON file
 @app.route('/api/load', methods=['GET'])
@@ -78,8 +89,10 @@ def load_settings():
             return jsonify({"status": "success", "params": simulation_params})
         else:
             return jsonify({"status": "error", "message": "No saved settings found"}), 404
+    except PermissionError as e:
+        return jsonify({"status": "error", "message": "Permission denied: Unable to load settings. Please check directory permissions."}), 500
     except Exception as e:
-        return jsonify({"status": "error", "message": str(e)}), 500
+        return jsonify({"status": "error", "message": f"Error loading settings: {str(e)}"}), 500
 
 if __name__ == '__main__':
     port = int(os.environ.get('PORT', 7860))  # Default port for Hugging Face Spaces