登录功能完成:
- js:设置return
- html:设置
- form
- input
- 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:
js:
function fnLogin() { var oUname = document.getElementById("uname"); var oError = document.getElementById("error-box"); var oUpass = document.getElementById("upass"); var oUpass1 = document.getElementById("upass1"); var isoError = true; oError.innerHTML = "<br>"; if (oUname.value.length<6||oUname.value.length>20){ oError.innerHTML="用户名要6-20位"; isoError = false; return; } else if(oUname.value.charCodeAt(0)>=48&&(oUname.value.charCodeAt(0)<=57)){ oError.innerHTML = "用户名首位必须为字母"; isoError = false; return; }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 = "用户名必须为字母或数字"; isoError = false; return; } } if (oUpass.value.length<6||oUpass.value.length>20){ oError.innerHTML="密码至少6-20位"; isoError = false; return; } if (oUpass1.value!=oUpass.value){ oError.innerHTML="密码不一致,请重新输入"; isoError = false; return; } return isoError; return window.alert("注册成功!") }
html:
{% extends 'base.html' %} {% block title %} login {% endblock %} {% block head %} <link rel="stylesheet" type="text/css" href="{{ url_for('static',filename='css/10.31.css') }}"> <script src="{{ url_for('static',filename='js/10.31.js') }}"></script> {% endblock %} {% block main %} <div class="box"> <div id="title">LoginText</div> <h3>登录</h3> <form action="{{ url_for('login') }}" method="post"> <div class="input-box"> 账号:<input id="uname" type="text" name="username" placeholder="请输入用户名"> </div> <div class="input-box"> 密码:<input id="upass" type="password" name="password" placeholder="请输入密码"> </div> <div id="error-box"><br></div> <div class="input-box"> <button onclick="fnLogin()">登录</button> <a href="{{ url_for('register') }}">注册/Register</a> </div> </form> </div> {% endblock %}
py:
@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).first() if user: if user.password == passw: session['user'] = usern session.permanent = True return redirect(url_for('index')) # 重定向到首页 else: return u'password error' else: return u'username is not existed'
session:
- 从`flask`中导入`session`
from flask import render_template,redirect,url_for,request,session
- 设置`SECRET_KEY`
import os SELECT_KEY = os.urandom(24)
- 操作字典一样操作`session`:增加用户名`session['username']=`username
session['user'] = usern session.permanent = True