flask之wtform与flask-session组件

Posted 2020-10-20 TAMAYURA

1.wtform

from flask import Flask, render_template, request, redirect

from wtforms import Form

from wtforms.fields import core
from wtforms.fields import html5
from wtforms.fields import simple

from wtforms import validators
from wtforms import widgets

app = Flask(__name__, template_folder=‘templates‘)
app.debug = True

class MyValidator(object):
    def __init__(self,message):
        self.message = message
    def __call__(self, form, field):
        print(field.data)
        if field.data == ‘王浩‘:
            return None
        raise validators.StopValidation(self.message)


class LoginForm(Form):
    name = simple.StringField(
        label=‘用户名‘,
        validators=[
            # MyValidator(message=‘用户名必须等于王浩‘)
            validators.DataRequired(message=‘用户名不能为空.‘),
            validators.Length(min=6, max=18, message=‘用户名长度必须大于%(min)d且小于%(max)d‘)
        ],
        widget=widgets.TextInput(),
        render_kw={‘class‘: ‘form-control‘}
    )
    pwd = simple.PasswordField(
        label=‘密码‘,
        validators=[
            validators.DataRequired(message=‘密码不能为空.‘),
            validators.Length(min=8, message=‘用户名长度必须大于%(min)d‘),
            validators.Regexp(regex="^(?=.*[a-z])(?=.*[A-Z])(?=.*\d)(?=.*[[email protected]$!%*?&])[A-Za-z\[email protected]$!%*?&]{8,}",
                              message=‘密码至少8个字符，至少1个大写字母，1个小写字母，1个数字和1个特殊字符‘)
        ],
        widget=widgets.PasswordInput(),
        render_kw={‘class‘: ‘form-control‘}
    )


@app.route(‘/login‘, methods=[‘GET‘, ‘POST‘])
def login():
    if request.method == ‘GET‘:
        form = LoginForm()
        return render_template(‘login.html‘, form=form)
    else:
        form = LoginForm(formdata=request.form)
        if form.validate():
            print(‘用户提交数据通过格式验证，提交的值为：‘, form.data)
        else:
            print(form.errors)
        return render_template(‘login.html‘, form=form)





# ########################### 用户注册 ##########################
class RegisterForm(Form):
    name = simple.StringField(
        label=‘用户名‘,
        validators=[
            validators.DataRequired()
        ],
        widget=widgets.TextInput(),
        render_kw={‘class‘: ‘form-control‘},
        default=‘alex‘
    )

    pwd = simple.PasswordField(
        label=‘密码‘,
        validators=[
            validators.DataRequired(message=‘密码不能为空.‘)
        ],
        widget=widgets.PasswordInput(),
        render_kw={‘class‘: ‘form-control‘}
    )

    pwd_confirm = simple.PasswordField(
        label=‘重复密码‘,
        validators=[
            validators.DataRequired(message=‘重复密码不能为空.‘),
            validators.EqualTo(‘pwd‘, message="两次密码输入不一致")
        ],
        widget=widgets.PasswordInput(),
        render_kw={‘class‘: ‘form-control‘}
    )

    email = html5.EmailField(
        label=‘邮箱‘,
        validators=[
            validators.DataRequired(message=‘邮箱不能为空.‘),
            validators.Email(message=‘邮箱格式错误‘)
        ],
        widget=widgets.TextInput(input_type=‘email‘),
        render_kw={‘class‘: ‘form-control‘}
    )

    gender = core.RadioField(
        label=‘性别‘,
        choices=(
            (1, ‘男‘),
            (2, ‘女‘),
        ),
        coerce=int
    )
    city = core.SelectField(
        label=‘城市‘,
        choices=(
            (‘bj‘, ‘北京‘),
            (‘sh‘, ‘上海‘),
        )
    )

    hobby = core.SelectMultipleField(
        label=‘爱好‘,
        choices=(
            (1, ‘篮球‘),
            (2, ‘足球‘),
        ),
        coerce=int
    )

    favor = core.SelectMultipleField(
        label=‘喜好‘,
        choices=(
            (1, ‘篮球‘),
            (2, ‘足球‘),
        ),
        widget=widgets.ListWidget(prefix_label=False),
        option_widget=widgets.CheckboxInput(),
        coerce=int,
        default=[1, 2]
    )

    def __init__(self, *args, **kwargs):
        super(RegisterForm, self).__init__(*args, **kwargs)
        self.favor.choices = ((1, ‘篮球‘), (2, ‘足球‘), (3, ‘羽毛球‘))

    def validate_pwd_confirm(self, field):
        """
        自定义pwd_confirm字段规则，例：与pwd字段是否一致
        :param field: 
        :return: 
        """
        # 最开始初始化时，self.data中已经有所有的值

        if field.data != self.data[‘pwd‘]:
            # raise validators.ValidationError("密码不一致") # 继续后续验证
            raise validators.StopValidation("密码不一致")  # 不再继续后续验证


@app.route(‘/register‘, methods=[‘GET‘, ‘POST‘])
def register():
    if request.method == ‘GET‘:
        # 设置默认值
        form = RegisterForm(data={‘gender‘: 1})
        return render_template(‘register.html‘, form=form)
    else:
        form = RegisterForm(formdata=request.form)
        if form.validate():
            print(‘用户提交数据通过格式验证，提交的值为：‘, form.data)
        else:
            print(form.errors)
        return render_template(‘register.html‘, form=form)


if __name__ == ‘__main__‘:
    app.run()

2.flask-session

#!/usr/bin/env python
# -*- coding:utf-8 -
import redis
from flask import Flask,current_app,session
from flask_session import Session
app = Flask(__name__)
app.debug = True
app.secret_key = ‘xxxx‘

# 为Flask-session组件提供的配置
# app.config[‘SESSION_TYPE‘] = ‘redis‘  # session类型为redis
# app.config[‘SESSION_REDIS‘] = redis.Redis(host=‘127.0.0.1‘, port=‘6379‘, password=‘123123‘)  # 用于连接redis的配置
# app.config[‘SESSION_KEY_PREFIX‘] = ‘session:‘  # 保存到session中的值的前缀
# app.config[‘SESSION_PERMANENT‘] = False  # 如果设置为True，则关闭浏览器session就失效。
# app.config[‘SESSION_USE_SIGNER‘] = False  # 是否对发送到浏览器上 session:cookie值进行加密
# Session(app)
#
# import memcache
# app.config[‘SESSION_TYPE‘] = ‘memcached‘ # session类型为redis
# app.config[‘SESSION_PERMANENT‘] = True # 如果设置为True，则关闭浏览器session就失效。
# app.config[‘SESSION_USE_SIGNER‘] = False # 是否对发送到浏览器上session的cookie值进行加密
# app.config[‘SESSION_KEY_PREFIX‘] = ‘session:‘ # 保存到session中的值的前缀
# app.config[‘SESSION_MEMCACHED‘] = memcache.Client([‘10.211.55.4:12000‘])
# Session(app)

app.config[‘SESSION_TYPE‘] = ‘filesystem‘  # session类型为redis
app.config[‘SESSION_FILE_DIR‘] = r‘C:\Users\Administrator\PycharmProjects\day121\2.flask-session组件‘  # session类型为redis
app.config[‘SESSION_FILE_THRESHOLD‘] = 500  # 存储session的个数如果大于这个值时，就要开始进行删除了
app.config[‘SESSION_FILE_MODE‘] = 384  # 文件权限类型

app.config[‘SESSION_PERMANENT‘] = True  # 如果设置为True，则关闭浏览器session就失效。
app.config[‘SESSION_USE_SIGNER‘] = False  # 是否对发送到浏览器上session的cookie值进行加密
app.config[‘SESSION_KEY_PREFIX‘] = ‘session:‘  # 保存到session中的值的前缀

Session(app)




@app.route(‘/index‘)
def index():
    session[‘k1‘] = ‘v1‘
    return ‘xx‘


if __name__ == ‘__main__‘:
    app.run()