完成登录功能，用session记住用户名

登录功能完成：

js:设置return
html:设置
1. form
2. input
3. ```
onclick="return fnLogin()"
```
py:
1. @app.route设置methods
2. GET
3. POST
  1. 读取表单数据
  2. 查询数据库
    1. 用户名密码对：
      1. 记住用户名
      2. 跳转到首页
    2. 用户名密码不对：
      1. 提示相应错误。

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

import os
DEBUG = True

SECRET_KEY = os.urandom(24)

DIALECT = 'mysql'
DRIVER = 'mysqldb'
USERNAME = 'root'
PASSWORD = 'ROOT'
HOST = '127.0.0.1'
DATABASE = 'mytest'


SQLALCHEMY_DATABASE_URI = 'mysql+pymysql://root:123456@127.0.0.1:3306/mytest?charset=utf8'
SQLALCHEMY_TRACK_MODIFICATIONS = False

<!DOCTYPE html>
<html lang="en">
<head>
    {% extends 'test1.html' %}
    <meta charset="UTF-8">
    <title>{% block title %}
    登录界面
    {% endblock %}
    </title>
{% block head %}
<link rel="stylesheet" type="text/css" href="../static/css/denlu.css">
    <script src="../static/js/return.js"></script>
{% endblock %}


</head>
<body>
{% block body %}
    <div class="box">
        <h1>登录</h1>
        <form action="{{ url_for('deng') }}" method="post">
              <div class="input_box">
            <input id="name" type="text" placeholder="请输入用户名" name="username">
        </div>
        <div class="input_box">
            <input id="pass" type="password" placeholder="请输入密码" name="password">
        </div>
        <div id="error_box"><br>
        </div>
        <div class="input_box">
            <button onclick="fnLogin()">登录</button>
        </div>
        </form>

    </div>
{% endblock %}

</body>
</html>

function fnLogin() {
    var oUname = document.getElementById("name");
    var oUpass = document.getElementById("pass");
    var oError = document.getElementById("error_box");
    var isError = true;
    oError.innerHTML = '<br>'
    //
    if (oUname.value.length > 20 || oUname.value.length < 6) {
        oError.innerHTML = "name:6-20位";
        isError = false;
        return isError;
    } else if ((oUname.value.charCodeAt(0) >= 48) && (oUname.value.charCodeAt(0) <= 57)) {
        oError.innerHTML = "first letter.";
        isError = false;
        return isError;
    } else for (var i = 0; i < oUname.value.length; i++) {
        if ((oUname.value.charCodeAt(i) < 48) || (oUname.value.charCodeAt(i) > 57) && (oUname.value.charCodeAt(0) < 97) || (oUname.value.charCodeAt(0) > 122)) {
            oError.innerHTML = "only letter or number";
            isError = false;
            return isError;
        }

    }

    if (oUpass.value.length > 20 || oUpass.value.length < 6) {
        oError.innerHTML = "password:6-20";
        isError = false;
        return isError;

    }
    return isError;
    window.alert("登录成功！")
}

posted @ 2017-11-22 16:09 092曹馨文阅读(95) 评论(0) 编辑收藏举报

会员力量，点亮园子希望

刷新页面返回顶部

完成登录功能，用session记住用户名

公告