Flask登录注册项目的简单实现-巨人网络通讯

Flask登录注册项目的简单实现

本文主要介绍了Flask登录注册项目的简单实现，分享给大家，具体如下：

目录结构

配置文件设计
/templates/config.py

#数据库连接配置
import pymysql

conn = pymysql.connect(
        host='192.XXX.XXX.XX',
        port=320xx,
        user='root',
        password='123456',
        database='test_XX'
    )

首页/templates/index.html

!DOCTYPE html>
html lang="en">
head>
    meta charset="UTF-8">
{#    link rel=stylesheet type=text/css href="{{ url_for('static', filename='style.css') }}" rel="external nofollow"  rel="external nofollow" >#}
    meta name="viewport" content="width=device-width, initial-scale=1.0">
    link rel="stylesheet"  type="text/css" href="/static/style.css" rel="external nofollow"  rel="external nofollow"  rel="external nofollow" >
    title>林家小猪测试小站/title>
/head>
body>
    div>
    h1>您好，{{ username }}，欢迎来到我的小站/h1>
        a href="{{ url_for('user_login') }}" rel="external nofollow"  rel="external nofollow" >退出/a>
        br/>
    /div>
/body>
/html>

登录页面/templates/login.html

!DOCTYPE html>
html lang="en">
head>
    meta charset="UTF-8">
    meta name="viewport" content="width=device-width, initial-scale=1.0">
    link rel="stylesheet"  type="text/css" href="/static/style.css" rel="external nofollow"  rel="external nofollow"  rel="external nofollow" >
{#    link rel="stylesheet" href="{{ url_for('static', filename='style.css') }}" rel="external nofollow"  rel="external nofollow"  type="text/css">#}
    title>登录/title>
/head>
body>
    div>
    h1>用户登录/h1>
    !--将登陆信息放到一个form中-->
    form method="POST">
        input type="text" name="username" placeholder="请输入用户名" />
        br/>
        input type="password" name="password" placeholder="请输入密码（小于12位）" />
        br/>
         !--jinja2的函数-->
        {% if message %} {{message}} {% endif %}
        br/>
        input type="submit" value="登录" />
        input type="reset" value="重置" />
        !--跳转到register的页面-->
        a href="{{ url_for('register') }}" rel="external nofollow" >注册/a>
    /form>
    /div>
/body>
/html>

注册页面/templates/register.html

!DOCTYPE html>
html lang="en">
head>
    meta charset="UTF-8">
    meta name="viewport" content="width=device-width, initial-scale=1.0">
    link rel="stylesheet"  type="text/css" href="/static/style.css" rel="external nofollow"  rel="external nofollow"  rel="external nofollow" >
    title>注册/title>
/head>
body>
    div>
    h1>用户注册/h1>
    form method="POST">
        input type="text" name="username" placeholder="请输入用户名" />
        br/>
        input type="password" name="password" placeholder="请输入密码（小于12位）" />
        br/>
        !--jinja2的函数-->
        {% if message %} {{message}} {% endif %}
        br/>
        input type="submit" value="注册" />
        input type="reset" value="重置" />
        a href="{{ url_for('user_login') }}" rel="external nofollow"  rel="external nofollow" >登录/a>
    /form>
    /div>
/body>
/html>

登录校验 /model/check_login.py

from templates.config import conn
cur = conn.cursor()
def is_null(username,password):
	if(username==''or password==''):
		return True
	else:
		return False


def is_existed(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

def exist_user(username):
	sql = "SELECT * FROM user WHERE username ='%s'" % (username)
	cur.execute(sql)
	result = cur.fetchall()
	if (len(result) == 0):
		return False
	else:
		return True

注册校验 /model/regist_login.py

from templates.config import conn

cur = conn.cursor()

def add_user(username, password):
    # sql commands
    sql = "INSERT INTO user(username, password) VALUES ('%s','%s')" %(username, password)
    # execute(sql)
    cur.execute(sql)
    # commit
    conn.commit()  # 对数据库内容有改变，需要commit()
    conn.close()

最后编辑运行文件
app.py

from flask import Flask,render_template
from flask import redirect
from flask import url_for
from flask import request
from model.check_login import is_existed,exist_user,is_null
from model.check_regist import add_user

app = Flask(__name__)

@app.route('/')
def index():
    return redirect( url_for('user_login') )

@app.route('/user_login',methods=['GET','POST'])
def user_login():
    if request.method=='POST':  # 注册发送的请求为POST请求
        username = request.form['username']
        password = request.form['password']
        if is_null(username,password):
            login_massage = "温馨提示：账号和密码是必填"
            return render_template('login.html', message=login_massage)
        elif is_existed(username, password):
            return render_template('index.html', username=username)
        elif exist_user(username):
            login_massage = "提示：密码错误，请输入正确密码"
            return render_template('login.html', message=login_massage)
        else:
            login_massage = "不存在该用户"
            return render_template('login.html', message=login_massage)
    return render_template('login.html')

@app.route("/regiser",methods=["GET", 'POST'])
def register():
    if request.method == 'POST':
        username = request.form['username']
        password = request.form['password']
        if is_null(username,password):
            login_massage = "温馨提示：账号和密码是必填"
            return render_template('register.html', message=login_massage)
        elif exist_user(username):
            return redirect(url_for('user_login'))
        else:
            add_user(request.form['username'], request.form['password'] )
            return render_template('index.html', username=username)
    return render_template('register.html')



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

到此这篇关于Flask登录注册项目的简单实现的文章就介绍到这了,更多相关Flask登录注册内容请搜索脚本之家以前的文章或继续浏览下面的相关文章希望大家以后多多支持脚本之家！

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