Flask登錄注冊項目的簡單實現(xiàn)

更新時間：2021年05月13日 11:52:38 作者：林家小豬

一個簡單的用戶注冊和登錄的頁面，涉及到驗證，數(shù)據庫存儲等等，本文主要介紹了Flask登錄注冊項目的簡單實現(xiàn)，從目錄結構開始，感興趣的可以了解一下

本文主要介紹了Flask登錄注冊項目的簡單實現(xiàn)，分享給大家，具體如下：

目錄結構

在這里插入圖片描述

配置文件設計
/templates/config.py

#數(shù)據庫連接配置
import pymysql

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

首頁/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>林家小豬測試小站</title>
</head>
<body>
    <div>
    <h1>您好，{{ username }}，歡迎來到我的小站</h1>
        <a href="{{ url_for('user_login') }}" rel="external nofollow"  rel="external nofollow" >退出</a>
        <br/>
    </div>
</body>
</html>

登錄頁面/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>登錄</title>
</head>
<body>
    <div>
    <h1>用戶登錄</h1>
    <!--將登陸信息放到一個form中-->
    <form method="POST">
        <input type="text" name="username" placeholder="請輸入用戶名" />
        <br/>
        <input type="password" name="password" placeholder="請輸入密碼（小于12位）" />
        <br/>
         <!--jinja2的函數(shù)-->
        {% if message %} {{message}} {% endif %}
        <br/>
        <input type="submit" value="登錄" />
        <input type="reset" value="重置" />
        <!--跳轉到register的頁面-->
        <a href="{{ url_for('register') }}" rel="external nofollow" >注冊</a>
    </form>
    </div>
</body>
</html>

注冊頁面/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>注冊</title>
</head>
<body>
    <div>
    <h1>用戶注冊</h1>
    <form method="POST">
        <input type="text" name="username" placeholder="請輸入用戶名" />
        <br/>
        <input type="password" name="password" placeholder="請輸入密碼（小于12位）" />
        <br/>
        <!--jinja2的函數(shù)-->
        {% if message %} {{message}} {% endif %}
        <br/>
        <input type="submit" value="注冊" />
        <input type="reset" value="重置" />
        <a href="{{ url_for('user_login') }}" rel="external nofollow"  rel="external nofollow" >登錄</a>
    </form>
    </div>
</body>
</html>

登錄校驗 /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

注冊校驗 /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()  # 對數(shù)據庫內容有改變，需要commit()
    conn.close()

最后編輯運行文件
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':  # 注冊發(fā)送的請求為POST請求
        username = request.form['username']
        password = request.form['password']
        if is_null(username,password):
            login_massage = "溫馨提示：賬號和密碼是必填"
            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：密碼錯誤，請輸入正確密碼"
            return render_template('login.html', message=login_massage)
        else:
            login_massage = "不存在該用戶"
            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 = "溫馨提示：賬號和密碼是必填"
            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()

到此這篇關于Flask登錄注冊項目的簡單實現(xiàn)的文章就介紹到這了,更多相關Flask登錄注冊內容請搜索腳本之家以前的文章或繼續(xù)瀏覽下面的相關文章希望大家以后多多支持腳本之家！

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