forked from mrlan/EnglishPal
143 lines
5.0 KiB
Python
143 lines
5.0 KiB
Python
from flask import *
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from Login import check_username_availability, verify_user, add_user, get_expiry_date, change_password, WarningMessage
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# 初始化蓝图
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accountService = Blueprint("accountService", __name__)
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### Sign-up, login, logout ###
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@accountService.route("/signup", methods=['GET', 'POST'])
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def signup():
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'''
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注册
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:return: 根据注册是否成功返回不同界面
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'''
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if request.method == 'GET':
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# GET方法直接返回注册页面
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return render_template('signup.html')
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elif request.method == 'POST':
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# POST方法需判断是否注册成功，再根据结果返回不同的内容
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username = escape(request.form['username'])
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password = escape(request.form['password'])
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#! 添加如下代码为了过滤注册时的非法字符
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warn = WarningMessage(username)
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if str(warn) != 'OK':
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return str(warn)
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available = check_username_availability(username)
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if not available: # 用户名不可用
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flash('用户名 %s 已经被注册。' % (username))
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return render_template('signup.html')
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elif len(password.strip()) < 4: # 密码过短
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return '密码过于简单。'
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else: # 添加账户信息
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add_user(username, password)
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verified = verify_user(username, password)
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if verified:
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# 写入session
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session['logged_in'] = True
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session[username] = username
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session['username'] = username
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session['expiry_date'] = get_expiry_date(username)
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session['articleID'] = None
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return '<p>恭喜，你已成功注册， 你的用户名是 <a href="%s">%s</a>。</p>\
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<p><a href="/%s">开始使用</a> <a href="/">返回首页</a><p/>' % (username, username, username)
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else:
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return '用户名密码验证失败。'
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@accountService.route("/login", methods=['GET', 'POST'])
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def login():
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'''
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登录
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:return: 根据登录是否成功返回不同页面
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'''
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if request.method == 'GET':
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# GET请求
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if not session.get('logged_in'):
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# 未登录，返回登录页面
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return render_template('login.html')
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else:
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# 已登录，提示信息并显示登出按钮
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return '你已登录 <a href="/%s">%s</a>。 登出点击<a href="/logout">这里</a>。' % (
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session['username'], session['username'])
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elif request.method == 'POST':
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# POST方法用于判断登录是否成功
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# check database and verify user
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username = escape(request.form['username'])
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password = escape(request.form['password'])
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verified = verify_user(username, password)
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if verified:
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# 登录成功，写入session
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session['logged_in'] = True
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session[username] = username
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session['username'] = username
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user_expiry_date = get_expiry_date(username)
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session['expiry_date'] = user_expiry_date
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session['articleID'] = None
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return redirect(url_for('user_bp.userpage', username=username))
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else:
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return '无法通过验证。'
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@accountService.route("/logout", methods=['GET', 'POST'])
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def logout():
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'''
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登出
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:return: 重定位到主界面
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'''
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# 将session标记为登出状态
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session['logged_in'] = False
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return redirect(url_for('mainpage'))
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@accountService.route("/reset", methods=['GET', 'POST'])
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def reset():
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'''
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重设密码
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:return: 返回适当的页面
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'''
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# 下列方法用于防止未登录状态下的修改密码
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if not session.get('logged_in'):
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return render_template('login.html')
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username = session['username']
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if username == '':
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return redirect('/login')
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if request.method == 'GET':
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# GET请求返回修改密码页面
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return render_template('reset.html', username=session['username'], state='wait')
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else:
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# POST请求用于提交修改后信息
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old_password = escape(request.form['old-password'])
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new_password = escape(request.form['new-password'])
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re_new_password = escape(request.form['re-new-password']) # 确认新密码
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if re_new_password != new_password: #验证新密码两次输入是否相同
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return '新密码不匹配，请重新输入'
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if len(new_password) < 4: #验证新密码长度，原则参照注册模块
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return '密码过于简单。(密码长度至少4位)'
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flag = change_password(username, old_password, new_password) # flag表示是否修改成功
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if flag:
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session['logged_in'] = False
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return \
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'''
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<script>
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alert('密码修改成功，请重新登录。');
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window.location.href="/login";
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</script>
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'''
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else:
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return \
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'''
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<script>
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alert('密码修改失败');
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window.location.href="/reset";
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</script>
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'''
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