16.登录功能完成

（1）front/forms.py

class SigninForm(BaseForm):    telephone = StringField(validators=[Regexp(r'1[3578]\d{9}', message='请输入正确格式的手机号码')])    password = StringField(validators=[Regexp(r'[0-9a-zA-Z_\.]{6,15}', message='请输入正确格式的密码')])    remember=StringField()

（2）config.py

FRONT_USER_ID = 'FFFF'

（3）front/views.py

class SigninView(views.MethodView):    def get(self):        return_to = request.referrer        if return_to and return_to != request.url and return_to != url_for('front.signup') and safeutils.is_safe_url(                return_to):            return render_template('front/signin.html', return_to=return_to)        else:            return render_template('front/signin.html')    def post(self):        form = SigninForm(request.form)        if form.validate():            telephone = form.telephone.data            password = form.password.data            remember = form.remember.data            user = FrontUser.query.filter_by(telephone=telephone).first()            if user and user.check_password(password):                session[config.FRONT_USER_ID] = user.id                if remember:                    session.permanent = True                return restful.success()            else:                return restful.params_error(message='手机号或密码错误')        else:            return restful.params_error(message=form.get_error())

（4）front_signin.js

/** * Created by Administrator on 2018/6/9. */$(function(){    $('#submit-btn').on('click',function(event){        event.preventDefault();        var telephone_input=$('input[name=telephone]');        var password_input=$('input[name=password]');        var remember_input=$('input[name=remember]');        var telephone=telephone_input.val();        var password=password_input.val();        var remember=remember_input.checked?1:0;        zlajax.post({           'url':'/signin/',           'data':{               'telephone':telephone,               'password':password,               'remember':remember           },            'success':function(data){               if(data['code']==200){                   var return_to=$('#return-to-span').text();                   if(return_to){                       window.location=return_to;                   }else{                       window.location='/'                   }               }else{                   zlalert.alertInfo(data['message']);               }            }        });    });});

（5）signin.html