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最新推荐文章于 2024-08-15 15:54:59 发布

转载最新推荐文章于 2024-08-15 15:54:59 发布 · 82 阅读

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CC 4.0 BY-SA版权

原文链接：http://www.cnblogs.com/testzcy/p/10659588.html

本文档通过一个具体的登录示例介绍了如何使用Flask框架结合WTForms实现表单验证，并展示了基本的HTML结构用于前端展示。

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参考资料：https://www.imooc.com/learn/864

flask大型教程项目：http://www.pythondoc.com/flask-mega-tutorial

http://www.imooc.com/learn/40

前端知识学习网站： http://w3school.com.cn/html/index.asp

淘宝前后端分离：http://2014.jsconf.cn/slides/herman-taobaoweb/#/

博文：前后端分离的思考与实践 
书：SOA与REST:用REST构建企业级SOA解决方案
书：企业应用架构模式

课程完整开源项目：https://github.com/litaotao/IPython-Dashboard

======================

===========================

<head>  <!--头 -->
    <title>Calculator</title>
    <script src="add.js" type="text/javascript"></script>  <!--指定js脚本 -->
</head>
<body> 
    <div align="center" style="margin-top:40px;">  <!--层，整体改变格式 -->
        <img src="add.png"> <!--图片 -->
    </div>
    <div align="center" style="margin-top:60px;">   <!--层，整体改变格式 -->
        <form name="form1"> <!--表单 -->
            <input type="text" placeholder="adder" name="adder1">+  <!--文本框 -->
            <input type="text" placeholder="adder-2" name="adder2">=
            <input type="text" readonly="readonly" placeholder="result" name="result">
            <input type="button" value="计算" onclick="add()">  <!--按钮 -->
        </form>
    </div>
</body>
<footer> <!--尾 -->
</footer>

===========

============wtforms

from flask import Flask
from flask import request
from flask import render_template
from flask import redirect

app=Flask(__name__)

from wtforms import Form,TextField,PasswordField,validators

class LoginForm(Form):
    username = TextField("username",[validators.Required()])
    password = PasswordField("password",[validators.Required()])

@app.route("/user",methods=['GET','POST'])
def login():
    myForm = LoginForm(request.form)
    if request.method=='POST':
        if myForm.username.data=="jikexueyuan" and myForm.password.data=="123456" and myForm.validate():
            return redirect("http://www.jikexueyuan.com")
        else:
            message="Login Failed"
            return render_template('index.html',message=message,form=myForm)
    return render_template('index.html',form=myForm)

if __name__=="__main__":
    app.run(port=8080)

======================

import MySQLdb

conn = MySQLdb.connect("localhost","root","","test")

cur = conn.cursor()

def insert(username,password):
    sql = "insert into user (username,password) values ('%s','%s')" %(username,password)
    cur.execute(sql)
    conn.commit()
    conn.close()

def isExisted(username,password):
    sql="select * from user where username ='%s' and password ='%s'" %(username,password)
    cur.execute(sql)
    result = cur.fetchall()
    if (len(result) == 0):
        return False
    else:
        return True

SQL注入：select * from users where name=1 and pwd=1 or 1=1

SQLAlchemy 是flask中常用的ORM
===========指定版本的安装
pip install pymongo==2.8
============

转载于:https://www.cnblogs.com/testzcy/p/10659588.html