#demo1file
#coding=utf-8
from flask import Flask，render_template ，request #render_template为模板
from config import Config
#Import the form provided by flask_wtf
from flask_wtf import FlaskForm
#Import the fields provided by the form class
from wtforms import StringField,PasswordField,SubmitField
#Import the validation function provided by the form class
from wtforms.validators import DataRequired,EqualTo
app = Flask(__name__)
# use configuration file
app.config.from_object(Config)
# Use CSRF to set the key
app.config['SECRET_KEY'] = 'python24'
#requirements: registration page
#custom form class
class Form(FlaskForm):
# define form fields /input/password/submit
user = StringField(validators=[DataRequired()])
pswd = PasswordField(validators=[DataRequired(),EqualTo('psed2')])
psw2 = PasswordField(validators=[DataRequired()])
submit = SubmitField(label=u'注册')
@app.route('/',method=['GET','POST'])
def demo2():
#Instantiate the form class object
form = Form（）
The #form.validata_on_submit() function will call the validator in turn. If the validator condition is satisfied, it will check whether the csrf_token is set in the form page
if form.validata_on_submit():
# get form data
us = form.user.data
ps = form.pswd.data
ps2 = form.pswd2.data
print us,ps,ps2
print form.validate_on_submit()
return render_template('login.html',form=form)
@app.route('/demo1',method=['GET','POST'])
def demo1():
#get form data
user = request.form.get('user')
pswd = request.form.get('pswd')
return render_template('login.html')
if __name__=='__main__':
app.run()
"""login.html under templates in the same level directory of demo1"""
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>{{request.merhod}}</title>
</head>
<body>
<h1>Sign up</h1>
<form method="post">
{# The essence of csrf_token is to obfuscate the parameters sent to the backend#}
{{form.csrf_token}}
<p>{{form.user}}</p>
<p>{{form.pswd}}</p>
<p>{{form.pswd2}}</p>
<p>{{form.submit}}</p>
</form>
<h2>Login</h2>
{#Handwritten input form, landing page#}
<form method="post">
<p><input type = "text" name="user" placehoder="User" size="35"></p>
<p><input type = "password" name="pswd" placehoder="Password" size="35"></p>
<p><input type="submit"></p>
</form>
</body>
</html>
"""demo1 sibling file config.py"""
class Config:
DEBUG = True