装饰器
# -*- coding:utf-8 -*-
from flask import Flask,request,render_template,jsonify,redirect,send_file,Markup
app = Flask(__name__)
app.config['DEBUG'] = True
@app.before_request
def f1():
print('before request...')
return None
@app.after_request
def f2(response):
print('after request...')
return response
@app.after_request
def f3(response):
print('f3...')
return response
# 自定制错误响应
@app.errorhandler(404)
def err0r404(error_msg):
print(error_msg)
# 这个文件位于当前py文件同一个目录下
return send_file('error_404.jpeg')
@app.route('/',methods=['GET','POST'])
def index():
dic = {
'msg':'你好'
}
return render_template('index.html',dic=dic)
@app.route('/login',methods=['GET','POST'])
def login():
if request.method == 'GET':
return render_template('login.html')
elif request.method == 'POST':
print(request.form)
print(request.form.get('password'))
return '666'
if __name__ == '__main__':
app.run('127.0.0.1',9001)
对应的登陆页面
![]()
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Login</title>
<style>
.red{
color:red;
}
.green{
color: green;
}
</style>
</head>
<body>
<form action="" method="post">
用户名: <input type="text" name="username" autocomplete="off">
密码： <input type="password" name="password" autocomplete="off">
<input type="submit">
<span class="{{ msg_class }}">{{ msg }}</span>
</form>
</body>
</html>
登陆页面