完成登錄功能，用session記住用戶名

本文轉載自查看原文 2017-11-22 20:32 2104

 提交作業

登錄功能完成：

js:設置return
html:設置
1. form
2. input
3. ```
onclick="return fnLogin()"
```
py:
1. @app.route設置methods
2. GET
3. POST
  1. 讀取表單數據
  2. 查詢數據庫
    1. 用戶名密碼對：
      1. 記住用戶名
      2. 跳轉到首頁
    2. 用戶名密碼不對：
      1. 提示相應錯誤。

session：

從`flask`中導入`session`
設置`SECRET_KEY`
操作字典一樣操作`session`：增加用戶名`session['username']=`username

mis1114.py:

from flask import Flask,render_template,request,redirect,url_for,session
from flask_sqlalchemy import SQLAlchemy
import config

app = Flask(__name__)
app.config.from_object(config)
db=SQLAlchemy(app)

class User(db.Model):
    __tablename__ = 'User'
    id = db.Column(db.Integer,primary_key=True,autoincrement=True)
    username = db.Column(db.String(20),nullable=False)
    password = db.Column(db.String(20),nullable=False)

@app.route('/')
def home():
    return render_template('shouye.html')

@app.route('/sign_in/',methods=['GET','POST'])
def sign_in():
    if request.method == 'GET':
        return render_template('login.html')
    else:
        username = request.form.get('username')
        password = request.form.get('password')
        user = User.query.filter(User.username == username).first()
        if user:
            if user.password == password:
                session['user']=username
                session.permanent = True
                return redirect(url_for('home'))
            else:
                return 'password error'
        else:
            return 'username is not existed.'


@app.route('/sign_up/',methods=['GET','POST'])
def sign_up():
    if request.method == 'GET':
        return render_template('register.html')
    else:
        username = request.form.get('username')
        password = request.form.get('password')
        user = User.query.filter(User.username == username).first()
        if user:
            return 'username existed.'
        else:
            user1 = User(username=username, password=password)
            db.session.add(user1)
            db.session.commit()
            return redirect(url_for('sign_in'))


@app.route('/question/')
def question():
    return render_template('question.html')

if __name__ == '__main__':
    app.run(debug=True)

config.py:

import os
SECRET_KEY = os.urandom(24)
SQLALCHEMY_DATABASE_URI = 'mysql+pymysql://root:@127.0.0.1:3306/mis_db?charset=utf8'
SQLALCHEMY_TRACK_MODIFICATIONS = False

{% extends'base.html' %}
{% block title %}
    Login
{% endblock %}
{% block head %}
    <script src="{{ url_for('static',filename='js/login js.js') }}"></script>
    <link rel="stylesheet" href="{{ url_for('static',filename='css/login css.css')}}">
    <link href="//netdna.bootstrapcdn.com/font-awesome/4.0.3/css/font-awesome.css" rel="stylesheet">
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/meyer-reset/2.0/reset.min.css">
{% endblock %}
{% block main %}
<body>
  <div class="login">
    <h1>Login</h1>
    <form class="form" method="post" action="{{ url_for('sign_in') }}">
      <p class="field">
        <input id="uname" type="text" name="username" placeholder="用戶名" required/>
         <i class="fa fa-user"><img src="../static/images/12.jpg" width="44px" height="auto"></i>
      </p>
      <p class="field">
        <input id="upass" type="password" name="password" placeholder="密碼" required/>
        <i class="fa fa-lock"><img src="../static/images/34.jpg" width="44px" height="auto"></i>
      </p>
        <p class="submit"><input type="button" name="sent" value="登錄" onclick="myLogin()"></p>

        <div id="error_box"><br></div>
    </form>
  </div>
</body>
{% endblock %}

function myLogin() {
    var oUname=document.getElementById("uname");
    var oPass=document.getElementById("upass");
    var oError=document.getElementById("error_box");
    oError.innerHTML="<br>";
    //username
    if(oUname.value.length<6||oUname.value.length>20){
        oError.innerHTML="username must be 6-20.";
        return false;
    }else if((oUname.value.charCodeAt(0)>=48)&&(oUname.value.charCodeAt(0)<=57)){
        oError.innerHTML="firt name can't numbuter.";
        return false;
    }else for(var i=0;i<oUname.value.length;i++){
        if((oUname.value.charCodeAt(i)<48||oUname.value.charCodeAt(i)>57)&&(oUname.value.charCodeAt(i)<97||oUname.value.charCodeAt(i)>122)){
            oError.innerHTML="only number and letter";
            return false;
        }
    }
    if(oPass.value.length<6||oPass.value.length>20){
        oError.innerHTML="password must be 6-20.";
        return false;
    }
    return true;
    // window.alert("Login Successful")
    }

免責聲明！

本站轉載的文章為個人學習借鑒使用，本站對版權不負任何法律責任。如果侵犯了您的隱私權益，請聯系本站郵箱yoyou2525@163.com刪除。

猜您在找 完成登錄功能，用session記住用戶名通過jquery.cookie.js實現記住用戶名、密碼登錄功能通過jquery.cookie.js實現記住用戶名、密碼登錄功能 Jquery 實現 “下次自動登錄” 記住用戶名密碼功能 JavaWeb登錄、注銷、退出、記住用戶名和密碼 jQuery cookie 實現記住用戶名和密碼功能讓Git記住用戶名和密碼 putty 記住用戶名和密碼 TortoiseGit：記住用戶名和密碼 iOS - 記住用戶登錄狀態保存用戶名密碼