注冊和登錄功能是絕大多數(shù)web應(yīng)用都需要實現(xiàn)的功能，是相當基礎(chǔ)的功能模塊，注冊登錄功能實現(xiàn)需要注意的地方也有很多。今天小編帶來了一篇flask實現(xiàn)注冊登錄功能的項目的簡單實現(xiàn)的文章，希望能給正在學習flask的小伙伴一點幫助。
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(jié)構(gòu)
配置文件設(shè)計
/templates/config.py
#數(shù)據(jù)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(zhuǎn)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(jù)庫內(nèi)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flask實現(xiàn)注冊登錄功能的項目的簡單實現(xiàn)的文章就介紹到這了,更多Flask學習內(nèi)容請搜索W3Cschool以前的文章或繼續(xù)瀏覽下面的相關(guān)文章。
