快速入门Python-Flask·下
1.使用Flask表单
使用Flask提供的后端表单
main.py
from flask import Flask,render_template,request
# 导入类型的包，字符串，密码，提交
from wtforms import StringField,PasswordField,SubmitField
from flask_wtf import FlaskForm
# 验证的包,不能为空，数据是否相同
from wtforms.validators import DataRequired,EqualTo
app=Flask(__name__)
# 防止攻击手段，后面字符串为随意字符串
app.config['SECRET_KEY'] = 'AQWESDFK'
# 定义表单模型类
class Register(FlaskForm):
username = StringField(label="用户名",validators=[DataRequired('用户名不能为空')])
password = StringField(label="密码", validators=[DataRequired('密码不能为空')])
agpassword = StringField(label="再次输入密码", validators=[DataRequired('密码不能为空'),EqualTo('password')])
submit = SubmitField(label="提交")
@app.route('/',methods=['GET','POST'])
def register():
# 创建表单对象
form = Register()
if request.method == 'GET':
return render_template('index.html',form=form)
if request.method == 'POST':
username = form.username.data
password = form.password.data
agpassword = form.agpassword.data
print(username)
print(password)
print(agpassword)
return render_template('index.html', form=form)
if __name__ == '__main__':
app.run()
index.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>表单</title>
</head>
<body>
<img src="static/header.jpg">
<form action="" method="post">
{{ form.username.label }}
{{ form.username }}
{{ form.password.label }}
{{ form.password }}
{{ form.agpassword.label }}
{{ form.agpassword }}
{{ form.submit }}
</form>
</body>
</html>
但是发现，前端输入了两个不相同的密码，依然传递给了后端
解决方法：加入验证器
index.html，注意添加：{{form.csrf_token}}
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>表单</title>
</head>
<body>
<img src="static/header.jpg">
<form action="" method="post">
{{form.csrf_token}}
{{ form.username.label }}
{{ form.username }}
{{ form.password.label }}
{{ form.password }}
{{ form.agpassword.label }}
{{ form.agpassword }}
{{ form.submit }}
</form>
</body>
</html>
main.py
from flask import Flask,render_template,request
# 导入类型的包，字符串，密码，提交
from wtforms import StringField,PasswordField,SubmitField
from flask_wtf import FlaskForm
# 验证的包,不能为空，数据是否相同
from wtforms.validators import DataRequired,EqualTo
app=Flask(__name__)
# 防止攻击手段，后面字符串为随意字符串
app.config['SECRET_KEY'] = 'AQWESDFK'
# 定义表单模型类
class Register(FlaskForm):
username = StringField(label="用户名",validators=[DataRequired('用户名不能为空')])
password = StringField(label="密码", validators=[DataRequired('密码不能为空')])
agpassword = StringField(label="再次输入密码", validators=[DataRequired('密码不能为空'),EqualTo('password')])
submit = SubmitField(label="提交")
@app.route('/',methods=['GET','POST'])
def register():
# 创建表单对象
form = Register()
if request.method == 'GET':
return render_template('index.html',form=form)
if request.method == 'POST':
# 加入验证器，确保数据是正确的
if form.validate_on_submit():
username = form.username.data
password = form.password.data
agpassword = form.agpassword.data
print(username)
print(password)
print(agpassword)
else:
print('验证失败！')
return render_template('index.html', form=form)
if __name__ == '__main__':
app.run()