fix: 修复 Flask 新版本 is_xhr 属性错误

Coze-Commit-Type: user
Coze-User-ID: 3722323274763196
Coze-Conversation-ID: 5260473

xuexiao/utils.py

@@ -243,7 +243,7 @@ def login_required(f):
     def decorated(*args, **kwargs):
         if not session.get('user_id'):
             from flask import request, jsonify
-            if request.is_xhr or request.headers.get('Content-Type') == 'application/json':
+            if request.headers.get('X-Requested-With') == 'XMLHttpRequest' or request.headers.get('Content-Type') == 'application/json':
                 return jsonify({'error': '请先登录'}), 401
             flash('请先登录', 'warning')
             return redirect(url_for('login'))