一、基本步骤框架如下：
1、增加 models（User），执行 alembic 更新数据库或者执行SQL创建对应的表
2、增加 utils 辅助函数 user_login
3、调用 authenticate，完成登录，编写相应的前端代码
4、编写退出类来进行用户退出处理
二、用户登录功能实现如下：
1、编写相关出处理get/post方法的登录类（在main.py模块中进行）
class LoginHandler(BaseHandler):
def get(self):
next_url = self.get_argument('next', '/')
print(next_url)
if self.current_user:
print("此时的session对应的值为{}".format(self.current_user))
self.redirect(next_url)
else:
self.render('user/login.html', next_url=next_url,msg="暂时无问题！！")
# if self.get_cookie("define_cookie"):
# username = self.get_cookie("define_cookie")
# session = Session()
# users = session.query(User.id, User.username, User.gender, User.age, User.creatime, User.emial,).all()
# self.render('user/information.html', username=username, users=users)
# else:
# self.render('user/login.html')
def post(self):
next_url = self.get_argument('next_url', '/')
username = self.get_argument("username", '')
password = self.get_argument("password", '')
ret = user_login(username, password)
if ret is not None:
# if not self.get_cookie("define_cookie"):
# self.set_cookie("define_cookie", username)
# if value == True:
# session = Session()
# users = session.query(User.id, User.username, User.gender, User.age, User.creatime, User.emial,).all()
# self.render('user/information.html', users=users, username =username)
# else:
# self.write('出现{}'.format(value))
if not self.session.get('username_session'):
if ret['result'] == True:
self.session.set("username_session", username)
# session = Session()
# users = session.query(User.id, User.username, User.gender, User.age, User.creatime, User.emial,).all()
# self.render('user/information.html', users=users, username=username)
self.redirect(next_url)
else:
self.render('user/login.html', next_url=next_url, msg=ret['msg'])
else:
self.render('user/login.html', next_url=next_url, msg='用户名不存在')
2、编写user_login函数来进行用户登录的相关逻辑
def user_login(username, password):
"""
用户登录模块
:param username:
:param password:
:return:
"""
try:
ret = {'result': False}
if username and password:
session = Session()
user = session.query(User).filter_by(username=username).first()
session.close()
# if hash(session.query(User.password).filter(User.username == username).first()[0]) == hash(password):
if hash(user.password) == hash(password):
ret['result'] = True
else:
ret['msg'] = '密码错误'
else:
ret['msg'] = '用户名和密码不能为空'
return ret
except:
pass
3、再写入相关的路由
handlers= [(r'/login', main.LoginHandler),]
4、编写前端代码
<!DOCTYPE html>
<html lang="zh-CN" >
<head>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<meta name="description" content="">
<meta name="author" content="">
<link rel="icon" href="../../static/upload/hu.ico">
<title>用户登录</title>
<link href="https://cdn.bootcss.com/bootstrap/3.3.7/css/bootstrap.min.css" rel="stylesheet">
<link href="../../static/css/signin.css" rel="stylesheet">
</head>
<body background="../../static/upload/dog.jpg">
<div class="container" >
<form class="form-signin" action="/login" enctype="multipart/form-data" method="post">
{% if msg!= None%}
<h4 style="margin-left: 75px;color: #ff6600">{{ msg }}</h4>
{% end %}
<h2 class="form-signin-heading" style="margin-left: 45px">请你进行登录</h2>
<label for="inputusername" class="sr-only">用户名</label>
<input type="text" id="inputusername" class="form-control" placeholder="请填写用户名" required autofocus name="username">
<label for="inputPassword" class="sr-only">密码</label>
<input type="password" id="inputPassword" class="form-control" placeholder="请填写密码" required name="password">
<input type="hidden" name="next_url" value="{{ next_url }}">
<button class="btn btn-lg btn-primary btn-block" type="submit">登录</button>
</form>
<div style="margin-left: 570px">
<font size="3"> <b>没有注册，点击<a href="/register">注册</a></b></font>
</div>
</div>
</body>
</html>
三、实现登出功能的代码如下：
1、编写相关出处理get方法的登出类（在main.py模块中进行）
class LogoutHandler(BaseHandler):
@tornado.web.authenticated
def get(self):
self.session.delete('username_session')
next_url = self.get_argument('next', '/')
self.render('user/login.html', msg="退出成功！！", next_url=next_url)
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