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

    
{#    #}
    
    
    


    

    
您好，{{ username }}，欢迎来到我的小站
        退出
        

    

登录页面/templates/login.html

    
    
    
{#    #}
    


    

    
用户登录
    
    

        
        

        
        

         
        {% if message %} {{message}} {% endif %}
        

        
        
        
        注册
    
    

注册页面/templates/register.html

    
    
    
    


    

    
用户注册
    

        
        

        
        

        
        {% if message %} {{message}} {% endif %}
        

        
        
        登录
    
    

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()

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