Update app.py

app.py

@@ -1115,13 +1115,31 @@ def send_message(recipient_id, message_text):
 def process_messenger_video(video_url, sender_id):
     """處理來自 Messenger 的影片（HuggingFace 整合版本）"""
     import tempfile
+    import time
     
     try:
         print(f"🎬 開始處理 Messenger 影片：{video_url}")
         
-        # 下載影片
-        response = requests.get(video_url, stream=True, timeout=30)
-        response.raise_for_status()
+        # 下載影片 - 增加重試邏輯
+        max_retries = 3
+        retry_delay = 2  # 初始延遲2秒
+        
+        for attempt in range(max_retries):
+            try:
+                print(f"📥 嘗試下載影片 (嘗試 {attempt + 1}/{max_retries})")
+                response = requests.get(video_url, stream=True, timeout=60)  # 增加超時時間
+                response.raise_for_status()
+                break  # 下載成功，跳出重試循環
+            except requests.exceptions.RequestException as e:
+                print(f"❌ 下載失敗 (嘗試 {attempt + 1}/{max_retries}): {e}")
+                if attempt < max_retries - 1:
+                    print(f"⏳ 等待 {retry_delay} 秒後重試...")
+                    time.sleep(retry_delay)
+                    retry_delay *= 2  # 指數退避
+                else:
+                    # 所有重試都失敗
+                    send_message(sender_id, "抱歉，下載影片時發生網路錯誤，請稍後再試。")
+                    return
         
         # 使用臨時檔案避免權限問題
         timestamp = datetime.now().strftime("%Y%m%d_%H%M%S")