Update app.py

app.py

@@ -6,10 +6,22 @@ import random
 USERNAME = "openfree"
 
 def format_timestamp(timestamp):
-    if timestamp:
-        dt = datetime.fromisoformat(timestamp.replace('Z', '+00:00'))
+    if not timestamp:
+        return 'N/A'
+    try:
+        # 문자열인 경우
+        if isinstance(timestamp, str):
+            dt = datetime.fromisoformat(timestamp.replace('Z', '+00:00'))
+        # 정수(밀리초)인 경우
+        elif isinstance(timestamp, (int, float)):
+            dt = datetime.fromtimestamp(timestamp / 1000)  # 밀리초를 초로 변환
+        else:
+            return 'N/A'
         return dt.strftime('%Y-%m-%d %H:%M')
-    return 'N/A'
+    except Exception as e:
+        print(f"Timestamp conversion error: {str(e)} for timestamp: {timestamp}")
+        return 'N/A'
+        
 
 def should_exclude_space(space_name):
     """특정 스페이스를 제외하는 필터 함수"""