Project structure:
1. Original simple form verification:
app.py
from flask import Flask, render_template, request, flash
app = Flask(__name__)
app.secret_key = 'mgosdjg'
'''
flash:给模板传递消息
模板中需要遍历消息
需要对内容加密，因此需要设置secret_key,做加密消息的混淆
'''
@app.route('/', methods=['GET', 'POST'])
def hello_world():
# request: 请求方式 --> 获取请求方式、数据
# 1.判断请求方式
if request.method == 'POST':
# 2.获取请求的参数
username = request.form.get('username')
password = request.form.get('password')
password2 = request.form.get('password2')
# 3.判断参数是否填写 & 密码是否相同
if not all([username, password, password2]):
# return '参数不完整'
flash(u'参数不完整')
elif password != password2:
# return '密码不一致'
flash(u'密码不一致')
else:
return 'success'
return render_template('index.html')
if __name__ == '__main__':
app.run(host='192.168.235.128', port=5000, debug=True)
index.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<form method="post">
<label>用户名：</label><input type="text" name="username"><br>
<label>密码：</label><input type="password" name="password"><br>
<label>确认密码：</label><input type="password" name="password2"><br>
<input type="submit" value="提交"><br>
{
# 使用遍历获取闪现的消息 #}
{
% for message in get_flashed_messages() %}
{
{
message }}
{
% endfor %}
</form>
</body>
</html>
Effect:
2. Use WTF:
flask-wtf
Description: It is a library for form processing and verification, and provides functions such as csrf.
Installation: pip3 install flask-wtf
(1) Field type
Field type field description
- StringField ordinary text field
- SubmitField Submit
- PasswordField Password field
- TextAreaField Multi-line text field
- DateField date field datetime.date
- DateTimeFiled time period datetime.datetime
- HiddenField Hidden Field
- IntegerField numeric field
- FloatField small number field
- BooleanField bool field True and False
- RadioFIeld radio field
- SelectField drop-down field
- FileField File upload field
(2) Verifier
Description of verifier name
- DataRequired is required
- Email verification email
- IPAddress verify the ip address default ipv4
- Length Verify the length min and max of the current value
- NumberRange value range provides min and max
- EqualTo verifies whether the values of the two input boxes are the same
- URL verification is a valid URL address
- Regexp regular matching
app.py
from flask import Flask, render_template, request, flash
from flask_wtf import FlaskForm
from wtforms import StringField, PasswordField, SubmitField
from wtforms.validators import DataRequired, EqualTo
app = Flask(__name__)
app.secret_key = 'mgosdjg'
'''
flash:给模板传递消息
模板中需要遍历消息
需要对内容加密，因此需要设置secret_key,做加密消息的混淆
'''
'''
自定义WTF实现表单
自定义表单类
'''
class LoginForm(FlaskForm):
username = StringField('用户名', validators=[DataRequired()])
password = PasswordField('密码', validators=[DataRequired()])
password2 = PasswordField('确认密码', validators=[DataRequired(), EqualTo('password', '密码填入的不一致')])
submit = SubmitField('提交')
@app.route('/', methods=['GET', 'POST'])
def login():
login_form = LoginForm()
# 1.判断请求方式
if request.method == 'POST':
# 2.获取请求的参数
username = request.form.get('username')
password = request.form.get('password')
password2 = request.form.get('password2')
# 3.验证参数，WTF可以一句话就实现左右的校验
# 注意前段加 csrf_token
if login_form.validate_on_submit():
return 'success'
else:
flash('参数有误')
return render_template('index.html', form=login_form)
if __name__ == '__main__':
app.run(host='192.168.235.128', port=5000, debug=True)
index.html
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
<form method="post">
{
{
form.csrf_token() }}
{
{
form.username.label }}{
{
form.username }} <br>
{
{
form.password.label }}{
{
form.password }} <br>
{
{
form.password2.label }}{
{
form.password2 }} <br>
{
{
form.submit }}
{
# 使用遍历获取闪现的消息 #}
{
% for message in get_flashed_messages() %}
{
{
message }}
{
% endfor %}
</form>
</body>
</html>
effect:
