114 lines
3.5 KiB
Python
114 lines
3.5 KiB
Python
"""
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认证装饰器与 session 校验
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"""
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from functools import wraps
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from flask import request, redirect, url_for, session, jsonify, g
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from utils.db import get_db
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def is_session_user_valid():
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"""校验 session 中的 user_id 是否仍存在；不存在则清空 session。"""
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uid = session.get('user_id')
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if not uid:
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return False
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cached_user = getattr(g, '_current_user_row', None)
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if cached_user and cached_user.get('id') == uid:
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return True
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try:
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conn = get_db()
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with conn.cursor() as cur:
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cur.execute(
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"SELECT id, username, is_admin, role, created_by_id FROM users WHERE id = %s",
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(uid,)
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)
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row = cur.fetchone()
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conn.close()
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if not row:
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session.clear()
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return False
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g._current_user_row = row
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return True
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except Exception:
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session.clear()
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return False
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def get_current_admin_role():
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"""返回当前登录用户的管理角色：super_admin / admin / None。"""
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uid = session.get('user_id')
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if not uid:
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return None, None
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try:
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row = getattr(g, '_current_user_row', None)
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if not row or row.get('id') != uid:
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conn = get_db()
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with conn.cursor() as cur:
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cur.execute(
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"SELECT id, username, is_admin, role, created_by_id FROM users WHERE id = %s",
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(uid,)
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)
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row = cur.fetchone()
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conn.close()
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if not row:
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return None, None
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g._current_user_row = row
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role = (row.get('role') or '').strip().lower()
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if not role:
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role = 'super_admin' if row.get('is_admin') and row.get('created_by_id') is None else (
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'admin' if row.get('is_admin') else 'normal'
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)
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return role, row
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except Exception:
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return None, None
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def is_current_user_admin():
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role, _ = get_current_admin_role()
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return role in ('super_admin', 'admin')
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def _is_ajax_request():
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if request.headers.get('X-Requested-With') == 'XMLHttpRequest':
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return True
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if request.path.startswith('/api/'):
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return True
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accept = (request.headers.get('Accept') or '').lower()
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if 'application/json' in accept:
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return True
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return False
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def login_required(f):
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@wraps(f)
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def decorated(*args, **kwargs):
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if not session.get('user_id') or not is_session_user_valid():
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if _is_ajax_request():
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return jsonify({'success': False, 'error': '未登录'}), 401
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return redirect(url_for('auth.login'))
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return f(*args, **kwargs)
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return decorated
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def admin_required(f):
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@wraps(f)
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def decorated(*args, **kwargs):
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if not session.get('user_id') or not is_session_user_valid():
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if _is_ajax_request():
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return jsonify({'success': False, 'error': '未登录'}), 401
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return redirect(url_for('auth.login'))
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try:
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role, _ = get_current_admin_role()
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if role not in ('super_admin', 'admin'):
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if _is_ajax_request():
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return jsonify({'success': False, 'error': '需要管理员权限'}), 403
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return redirect(url_for('auth.login'))
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except Exception as exc:
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if _is_ajax_request():
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return jsonify({'success': False, 'error': str(exc)}), 500
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return redirect(url_for('auth.login'))
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return f(*args, **kwargs)
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return decorated
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