一百一十九：CMS系统之将短信验证码和图形验证码放到memcached缓存中

将两个验证码的视图都放到common蓝图下

from flask import Blueprint, request, make_response
from exts import alidayu
from utils import restful
from utils.captcha import Captcha
from .forms import SMSCaptchaForm
from utils import cmscache
from io import BytesIO

bp = Blueprint("common", __name__, url_prefix='/common')

@bp.route('/captcha/')
def graph_captcha():
    """ 获取验证码 """
    text, image = Captcha.gene_graph_captcha()
    cmscache.set(text.lower(), text.lower())  # key和value都是验证码，存到memcached中
    out = BytesIO()  # 二进制流
    image.save(out, 'png')
    out.seek(0)
    resp = make_response(out.read())  # 二进制流读取出来放到响应对象中
    resp.content_type = 'image/png'
    return resp

@bp.route('/sms_captcha/', methods=['POST'])
def sms_captcha():
    """ 短信验证码 """
    form = SMSCaptchaForm(request.form)
    if form.validate():
        telephone = form.telephone.data
        captcha = Captcha.gene_text(number=4)
        if alidayu.send_sms(telephone, code=captcha):
            cmscache.set(telephone, captcha)  # 把验证码存到memcached中，telephone:captcha
            return restful.success()
        else:
            # return restful.params_error('验证码发送失败')
            cmscache.set(telephone, captcha)  # 把验证码存到memcached中，telephone:captcha
            return restful.success(captcha)  # 由于没有触发发送验证码，这里只要手机号验证通过统一返回验证码
    else:
        return restful.params_error('参数错误')

将模板的图形验证码的地址换为commo.graph_captcha