更新新增三个模块

backend/blueprints/auth.py

@@ -0,0 +1,74 @@
+"""
+认证蓝图：登录、登出、登录状态校验
+"""
+from flask import Blueprint, request, redirect, url_for, session, jsonify
+from werkzeug.security import check_password_hash
+
+from utils.db import get_db
+from utils.auth import login_required, is_session_user_valid
+from utils.render import render_html
+
+auth = Blueprint('auth', __name__, url_prefix='')
+
+
+@auth.route('/login', methods=['GET', 'POST'])
+def login():
+    if session.get('user_id') and is_session_user_valid():
+        return redirect(url_for('main.admin_page'))
+    if request.method == 'POST':
+        data = request.get_json() if request.is_json else request.form
+        username = (data.get('username') or '').strip()
+        password = data.get('password') or ''
+        if not username or not password:
+            if request.is_json:
+                return jsonify({'success': False, 'error': '请输入用户名和密码'})
+            return render_html('login.html', error='请输入用户名和密码')
+        try:
+            conn = get_db()
+            with conn.cursor() as cur:
+                cur.execute(
+                    "SELECT id, password_hash, machine, is_admin FROM users WHERE username = %s",
+                    (username,)
+                )
+                row = cur.fetchone()
+            if row and check_password_hash(row['password_hash'], password):
+                session.permanent = True
+                session['user_id'] = row['id']
+                session['username'] = username
+                if request.is_json:
+                    return jsonify({'success': True, 'redirect': url_for('main.admin_page')})
+                return redirect(url_for('main.admin_page'))
+            conn.close()
+        except Exception as e:
+            if request.is_json:
+                return jsonify({'success': False, 'error': str(e)})
+            return render_html('login.html', error='登录失败，请稍后重试')
+        if request.is_json:
+            return jsonify({'success': False, 'error': '用户名或密码错误'})
+        return render_html('login.html', error='用户名或密码错误')
+    return render_html('login.html')
+
+
+@auth.route('/api/auth/check')
+@login_required
+def api_auth_check():
+    """校验登录状态，用于页面加载时判断是否已登录"""
+    if not session.get('user_id'):
+        return jsonify({'logged_in': False})
+    try:
+        conn = get_db()
+        with conn.cursor() as cur:
+            cur.execute("SELECT machine, is_admin FROM users WHERE id = %s", (session['user_id'],))
+            row = cur.fetchone()
+        conn.close()
+        if not row:
+            return jsonify({'logged_in': False})
+    except Exception:
+        return jsonify({'logged_in': False})
+    return jsonify({'logged_in': True, 'redirect': url_for('main.admin_page')})
+
+
+@auth.route('/logout')
+def logout():
+    session.clear()
+    return redirect(url_for('auth.login'))