完成登录功能,用session记住用户名
登录功能完成:
- js:设置return
function fnLogin() { var oUname = document.getElementById("uname"); var oError = document.getElementById("error_box"); var oUpass = document.getElementById("upass"); oError.innerHTML="<br>"; if(oUname.value.length<6||oUname.value.length>20){ oError.innerHTML="用户名长度为6到12位"; return false; }else if(oUname.value.charCodeAt(0)>=48&&oUname.value.charCodeAt(0)<=57){ oError.innerHTML="用户名不能以数字开头"; return false; }else for(var i=0;i<oUname.value.length;i++){ if((oUname.value.charCodeAt(i)<48||oUname.value.charCodeAt(i)>57)&&(oUname.value.charCodeAt(i)<97||oUname.value.charCodeAt(i)>122)){ oError.innerHTML="用户名只能包含数字,小写字母"; return false; } } if(oUpass.value.length<6||oUpass.value.length>20){ oError.innerHTML="密码长度为6-12位"; return false; } window.alert("登录成功"); return true; }
- html:设置
- form
- input
-
onclick="return fnLogin()"
{% extends 'index.html' %} {% block denglutitle %}登陆{% endblock %} {% block dengluhead %} <link rel="stylesheet" type="text/css" href="{{ url_for('static',filename='css/login.css') }}"> <script src="{{ url_for('static',filename='js/login.js') }}"></script> {% endblock %} {% block denglubody %} <div id="container" style="margin-left: auto;margin-right: auto"> <div id="header"><h2 align="center">请登录</h2></div> <div id="content"> <form action="{{ url_for('login') }}" method="post"> Username:<input type="text" name="username" id="user" placeholder="请输入用户名"> <br> Password:<input type="password" name="password" id="pass" placeholder="请输入密码"> <br> <input type="radio" name="r1" id="r1" value="stu">student <input type="radio" name="r2" id="r2" value="tea">teacher <br> <input type="checkbox" name="c1" id="c1" value="">记住我 <br> <div id="error_box"><br></div> <button onclick="return fnLogin()">登录</button> <a href="">忘记密码?</a> </form> </div> <div id="footer"><p align="right">版权@misaki</p></div> </div> {% endblock %}
- py:
- @app.route设置methods
- GET
- POST
- 读取表单数据
- 查询数据库
- 用户名密码对:
- 记住用户名
- 跳转到首页
- 用户名密码不对:
- 提示相应错误。
- 用户名密码对:
session:
- 从`flask`中导入`session`
- 设置`SECRET_KEY`
- 操作字典一样操作`session`:增加用户名`session['username']=`username
from flask import Flask,render_template,request,redirect,url_for,session from flask_sqlalchemy import SQLAlchemy import config app = Flask(__name__) app.config.from_object(config) db=SQLAlchemy(app) class User(db.Model): __tablename__ = 'User' id = db.Column(db.Integer, primary_key=True, autoincrement=True) username = db.Column(db.String(20), nullable=False) password = db.Column(db.String(20), nullable=False) db.create_all() @app.route('/') def index(): return render_template('index.html') @app.route('/login/',methods=['get','post']) def login(): if request.method == 'GET': return render_template('login.html') else: usern = request.form.get('username') passw = request.form.get('password') user = User.query.filter(User.username == usern,User.password==passw).first() if user: session['user']=usern session.permanent=True return redirect(url_for('index')) else: return u'error username or password' @app.route('/zhuce/',methods=['get','post']) def zhuce(): if request.method=='GET': return render_template('zhuce.html') else: usern=request.form.get('username') passw =request.form.get('password') user=User.query.filter(User.username==usern).first() if user: return u'username existed' else: user1=User(username=usern,password=passw) db.session.add(user1) db.session.commit() return redirect(url_for('login')) if __name__ == '__main__': app.run(debug=True)
import os SQLALCHEMY_DATABASE_URI = 'mysql+pymysql://root:@127.0.0.1:3306/mis_db?charset=utf8' SQLALCHEMY_TRACK_MODIFICATIONS = False DEBUG=True SECRET_KEY=os.urandom(24)