Update app.py

app.py

@@ -3,6 +3,25 @@ from pydantic import BaseModel
 from transformers import pipeline
 import os
 
+import os
+from pathlib import Path
+
+
+# 验证缓存目录可写
+cache_dir = Path(os.getenv("HF_HOME", ""))
+if not cache_dir.exists():
+    cache_dir.mkdir(parents=True, exist_ok=True)
+    
+test_file = cache_dir / "permission_test.txt"
+try:
+    with open(test_file, "w") as f:
+        f.write("test")
+    os.remove(test_file)
+    print("✅ Cache directory is writable")
+except Exception as e:
+    print(f"❌ Cache directory write failed: {str(e)}")
+    raise
+
 # 正确加载模型（从缓存或下载）
 classifier = pipeline(
     "text-classification",