• flask之wtform与flask-session组件


    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)(?=.*[$@$!%*?&])[A-Za-zd$@$!%*?&]{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, ''),
                (2, ''),
            ),
            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:UsersAdministratorPycharmProjectsday1212.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()
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  • 原文地址:https://www.cnblogs.com/ldq1996/p/8253826.html
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