Update app.py

app.py

@@ -124,7 +124,6 @@ def download_file(filepath):
     try:
         url = f"https://{Config.PROXY_DOMAIN}/datasets/{Config.HF_DATASET_ID}/resolve/{Config.HF_BRANCH}/{filepath}"
         
-        # 获取文件基本信息
         response = requests.get(
             url, 
             headers={'Authorization': f'Bearer {Config.HF_TOKEN}'},
@@ -135,12 +134,16 @@ def download_file(filepath):
             filename = os.path.basename(filepath)
             encoded_filename = urllib.parse.quote(filename.encode('utf-8'))
             
-            # 直接流式传输文件内容
+            # Explicit content type handling for TXT files
+            content_type = response.headers.get('content-type')
+            if filename.lower().endswith('.txt'):
+                content_type = 'text/plain; charset=utf-8'
+            
             return Response(
                 response.iter_content(chunk_size=1048576),
                 headers={
                     'Content-Disposition': f'attachment; filename*=UTF-8\'\'{encoded_filename}',
-                    'Content-Type': response.headers.get('content-type', 'application/octet-stream'),
+                    'Content-Type': content_type or 'application/octet-stream',
                     'Content-Length': response.headers.get('content-length'),
                     'Accept-Ranges': 'bytes'
                 }
@@ -149,7 +152,10 @@ def download_file(filepath):
         return jsonify({'error': 'File not found'}), 404
         
     except Exception as e:
+        # Add logging for better error tracking
+        print(f"Download error for {filepath}: {str(e)}")
         return jsonify({'error': str(e)}), 500
+        
 @app.route('/api/files/upload', methods=['POST'])
 @require_auth
 def upload_file():