Update app.py

Switch to facebook/bart-large-cnn due to 503 error

app.py

@@ -10,19 +10,16 @@ if not HF_TOKEN:
 print(f"HF_TOKEN loaded: {len(HF_TOKEN) if HF_TOKEN else 0} characters")
 
 try:
-    summary_client = InferenceClient(model="google/pegasus-xsum", token=HF_TOKEN)
+    summary_client = InferenceClient(model="facebook/bart-large-cnn", token=HF_TOKEN)
     translation_client = InferenceClient(model="facebook/m2m100_418M", token=HF_TOKEN)
     def generate_summary(text):
         for _ in range(3):
             try:
-                # 首先生成英文摘要
                 response = summary_client.summarization(text)
                 print(f"Summary API Response: {response}")
                 summary_text = response.generated_text if hasattr(response, 'generated_text') and response.generated_text else response.summary_text if hasattr(response, 'summary_text') and response.summary_text else None
                 if not summary_text:
                     return "摘要生成失败，属性缺失。"
-                
-                # 将英文摘要翻译为中文
                 translated_response = translation_client.text_generation(
                     summary_text,
                     src_lang="en",
@@ -35,7 +32,8 @@ try:
                 error_details = traceback.format_exc()
                 print(f"尝试失败，错误类型: {type(e).__name__}, 错误详情: {str(e)}, 堆栈: {error_details}")
                 time.sleep(1)
-        return "网络错误，请稍后重试。"
+                return f"网络错误，请稍后重试。错误详情：{str(e)}"
+        return "网络错误，请稍后重试（重试次数已达上限）。"
     interface = gr.Interface(
         fn=generate_summary,
         inputs=gr.Textbox(lines=5, placeholder="输入文档内容..."),