目錄
- 0x01路由
- 0x02 模版和靜態(tài)文件
- 2.1 文件結(jié)構(gòu)
- 2.2代碼
- 2.3 運(yùn)行效果
- 0x03 json
- 0x04 重定向
- 4.1 訪(fǎng)問(wèn)跳轉(zhuǎn)
- 4.2 打印路由
- 4.3 跳轉(zhuǎn)傳參
- 0x05 jinjia2模版
- 0x06 藍(lán)圖
- 0x07 登錄
- 7.1結(jié)構(gòu)
- 7.2代碼
- 7.3實(shí)現(xiàn)效果
視頻教程教學(xué)地址：https://www.bilibili.com/video/BV18441117Hd?p=1
0x01路由
from flask import Flask
app = Flask(__name__) # flask對(duì)象實(shí)例化
@app.route('/index') #定義首頁(yè)
@app.route('/') #設(shè)置默認(rèn)index
def index():
return 'hello world!'
@app.route('/home/string:username>') # 生成home路由,單一傳參
def home(username):
print(username)
return 'h1>歡迎回家/h1>'
@app.route('/main/string:username>/string:password>') #多個(gè)參數(shù)傳遞
def main(username,password):
print(username)
print(password)
return 'h1>welcome/h1>'
def about():
return 'about page'
app.add_url_rule(rule='/about',view_func=about) #另一種添加路由的方式
if __name__ == '__main__':
app.debug = True #開(kāi)啟debug模式
app.run()
0x02 模版和靜態(tài)文件
2.1 文件結(jié)構(gòu)
2.2代碼
#app.py
#app.py
from flask import Flask,render_template #倒入模版
app = Flask(__name__) #聲明模版文件夾
@app.route(('/index'))
def index():
return render_template('index.html') #返回模版
if __name__ == '__main__':
app.run(debug=True)
!DOCTYPE html>
html lang="en">
head>
meta charset="UTF-8">
title>Title/title>
/head>
body>
h1>hello hello/h1>
img src="/static/imgs/1.png">
/body>
/html>
2.3 運(yùn)行效果
0x03 json
from flask import Flask,jsonify
app = Flask(__name__)
@app.route('/')
def index():
user = {'name':'李三','password':'123'}
return jsonify(user)
if __name__ == '__main__':
app.run(debug=True)
3.1運(yùn)行效果
0x04 重定向
4.1 訪(fǎng)問(wèn)跳轉(zhuǎn)
from flask import Flask, redirect #導(dǎo)入跳轉(zhuǎn)模塊
app = Flask(__name__)
@app.route('/index')
def index():
return redirect('https://www.baidu.com') #指定跳轉(zhuǎn)路徑，訪(fǎng)問(wèn)/index目錄即跳到百度首頁(yè)
@app.route('/home')
def home():
return 'home page'
if __name__ == '__main__':
app.run(debug=True)
4.2 打印路由
from flask import Flask,url_for #導(dǎo)入模塊
app = Flask(__name__)
@app.route('/index')
def index():
return 'test'
@app.route('/home')
def home():
print(url_for('index')) 打印 index路由
return 'home page'
if __name__ == '__main__':
app.run(debug=True)
4.3 跳轉(zhuǎn)傳參
# 訪(fǎng)問(wèn)home，將name帶入index并顯示在頁(yè)面
from flask import Flask,url_for,redirect #導(dǎo)入模塊
app = Flask(__name__)
@app.route('/indexstring:name>')
def index(name):
return 'test %s' % name
@app.route('/home')
def home():
return redirect(url_for('index',name='admin'))
if __name__ == '__main__':
app.run(debug=True)
0x05 jinjia2模版
5.1代碼
from flask import Flask,render_template #倒入模版
app = Flask(__name__) #聲明模版文件夾
@app.route(('/index'))
def index():
user = 'admin'
data = ['111',2,'李三']
userinfo = {'username':'lisan','password':'12333'}
return render_template('index.html',user=user,data=data,userinfo=userinfo) #返回模版,傳入數(shù)據(jù)
if __name__ == '__main__':
app.run(debug=True)
!DOCTYPE html>
html lang="en">
head>
meta charset="UTF-8">
title>Title/title>
/head>
body>
h1>11111/h1>
{{user}}
{{data}} #直接傳入
{% if user == 'admin'%} #簡(jiǎn)單邏輯判斷
h1 style="color:red">管理員/h1>
{% else %}
h1 style="color:green">普通用戶(hù)/h1>
{% endif %}
hr>
{% for item in data %} # for循環(huán)
li>{{item}}/li>
{% endfor %}
hr>
{{ userinfo['username'] }}
{{ userinfo['password'] }}
hr>
{{ user | upper }} #字母大寫(xiě)（更多可查閱jinjia2過(guò)濾器）
/body>
/html>
5.2 運(yùn)行效果
0x06 藍(lán)圖
目的是為了更好的細(xì)分功能模塊
6.1代碼結(jié)構(gòu)
├── admin
│ └── admin.py
└── app.py
6.2 代碼
#admin.py
from flask import Blueprint 導(dǎo)入藍(lán)圖模塊
admin = Blueprint('admin',__name__,url_prefix='/admin') #對(duì)象實(shí)例化，url_prefix添加路由前綴，表示若想訪(fǎng)問(wèn)本頁(yè)相關(guān)路由，只能通過(guò)形如 xxx/admin/login 訪(fǎng)問(wèn)，不能 xxx/login訪(fǎng)問(wèn)
@admin.route('/register')
def register():
return '歡迎注冊(cè)'
@admin.route('/login')
def login():
return '歡迎登錄'
#app.py
from flask import Flask
from admin.admin import admin as admin_blueprint # 導(dǎo)入藍(lán)圖
app = Flask(__name__) #聲明模版文件夾
app.register_blueprint(admin_blueprint) #注冊(cè)藍(lán)圖
@app.route(('/index'))
def index():
return 'index page'
if __name__ == '__main__':
app.run(debug=True)
0x07 登錄
7.1結(jié)構(gòu)
7.2代碼
#web.py
from flask import Flask,render_template,request,redirect,flash,url_for,session
from os import urandom
app = Flask(__name__)
app.config['SECRET_KEY'] = urandom(50)
@app.route('/index')
def index():
if not session.get('user'):
flash('請(qǐng)登錄后操作','warning')
return redirect(url_for('login'))
return render_template('index.html')
@app.route('/login',methods=['GET','POST'])
def login():
if request.method == 'GET':
return render_template('login.html')
elif request.method == 'POST':
username = request.form.get('username')
password = request.form.get('password')
if username == 'admin' and password == '888888':
flash('登錄成功','success')
session['user'] = 'admin'
return redirect(url_for('index'))
else:
flash('登錄失敗','danger')
return redirect(url_for('login'))
if __name__ == '__main__':
app.run(debug=True)
# index.html
!DOCTYPE html>
html lang="en">
head>
meta charset="UTF-8">
title>Title/title>
link rel="stylesheet" rel="external nofollow" rel="external nofollow" integrity="sha384-HSMxcRTRxnN+Bdg0JdbxYKrThecOKuH5zCYotlSAcp1+c8xmyTe9GYg1l9a69psu" crossorigin="anonymous">
!-- 最新的 Bootstrap 核心 JavaScript 文件 -->
script src="https://stackpath.bootstrapcdn.com/bootstrap/3.4.1/js/bootstrap.min.js" integrity="sha384-aJ21OjlMXNL5UyIl/XNwTMqvzeRMZH2w8c5cRVpzpU8Y5bApTppSuUkhZXN0VxHd" crossorigin="anonymous">/script>
/head>
body>
h1>歡迎你，管理員/h1>
{% for color, message in get_flashed_messages(with_categories=True) %}
div class="alert alert-{{color}} alert-dismissible" role="alert">
button type="button" class="close" data-dismiss="alert" aria-label="Close">span aria-hidden="true">times;/span>/button>
p>{{message}}/p>
/div>
{% endfor %}
/body>
/html>
#login.html
!DOCTYPE html>
html lang="en">
head>
meta charset="UTF-8">
title>login/title>
!-- 最新版本的 Bootstrap 核心 CSS 文件 -->
link rel="stylesheet" rel="external nofollow" rel="external nofollow" integrity="sha384-HSMxcRTRxnN+Bdg0JdbxYKrThecOKuH5zCYotlSAcp1+c8xmyTe9GYg1l9a69psu" crossorigin="anonymous">
!-- 最新的 Bootstrap 核心 JavaScript 文件 -->
script src="https://stackpath.bootstrapcdn.com/bootstrap/3.4.1/js/bootstrap.min.js" integrity="sha384-aJ21OjlMXNL5UyIl/XNwTMqvzeRMZH2w8c5cRVpzpU8Y5bApTppSuUkhZXN0VxHd" crossorigin="anonymous">/script>
/head>
body>
form action="/login" method="post">
div class='form-group'>
input type="text" name="username" placeholder="請(qǐng)輸入用戶(hù)名" class="form-control">
/div>
div class='form-group'>
input type="password" name="password" placeholder="請(qǐng)輸入密碼" class="form-control">
/div>
div class="form-group">
input type="submit" value= "submit" class="btn btn-primary">
/div>
/form>
{% for color, message in get_flashed_messages(with_categories=True) %}
div class="alert alert-{{color}} alert-dismissible" role="alert">
button type="button" class="close" data-dismiss="alert" aria-label="Close">span aria-hidden="true">times;/span>/button>
p>{{message}}/p>
/div>
{% endfor %}
/body>
/html>
7.3實(shí)現(xiàn)效果
7.3.1未登錄默認(rèn)跳轉(zhuǎn)到登錄頁(yè)面
7.3.2登錄成功跳轉(zhuǎn)到index頁(yè)面
賬戶(hù)密碼：admin/888888
7.3.2登錄失敗效果
到此這篇關(guān)于Python Flask基礎(chǔ)到登錄功能的實(shí)現(xiàn)的文章就介紹到這了,更多相關(guān)Python Flask登錄內(nèi)容請(qǐng)搜索腳本之家以前的文章或繼續(xù)瀏覽下面的相關(guān)文章希望大家以后多多支持腳本之家！
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