短信驗證碼邏輯

class SMSCodeView(View):
    """短信驗證碼"""

    def get(self, reqeust, mobile):
        """
        :param reqeust: 請求對象
        :param mobile: 手機號
        :return: JSON
        """
        # 1. 接收參數
        image_code_client = reqeust.GET.get('image_code')
        uuid = reqeust.GET.get('image_code_id')

        # 2. 校驗參數
        if not all([image_code_client, uuid]):
            return http.JsonResponse({'code': RETCODE.NECESSARYPARAMERR, 
                                      'errmsg': '缺乏必傳參數'})

        # 3. 建立鏈接到redis的對象
        redis_conn = get_redis_connection('verify_code')

        # 4. 提取圖形驗證碼
        image_code_server = redis_conn.get('img_%s' % uuid)
        if image_code_server is None:
            # 圖形驗證碼過時或者不存在
            return http.JsonResponse({'code': RETCODE.IMAGECODEERR, 
                                      'errmsg': '圖形驗證碼失效'})

        # 5. 刪除圖形驗證碼，避免惡意測試圖形驗證碼
        try:
            redis_conn.delete('img_%s' % uuid)
        except Exception as e:
            logger.error(e)

        # 6. 對比圖形驗證碼
        # bytes 轉字符串
        image_code_server = image_code_server.decode()  
        # 轉小寫後比較
        if image_code_client.lower() != image_code_server.lower():  
            return http.JsonResponse({'code': RETCODE.IMAGECODEERR, 
                                      'errmsg': '輸入圖形驗證碼有誤'})

        # 7. 生成短信驗證碼：生成6位數驗證碼
        sms_code = '%06d' % random.randint(0, 999999)
        logger.info(sms_code)

        # 8. 保存短信驗證碼
        # 短信驗證碼有效期，單位：秒
                # SMS_CODE_REDIS_EXPIRES = 300
        redis_conn.setex('sms_code_%s' % mobile, 
                         constants.SMS_CODE_REDIS_EXPIRES, 
                         sms_code)

        # 9. 發送短信驗證碼
        # 短信模板
        # SMS_CODE_REDIS_EXPIRES // 60 = 5min
                # SEND_SMS_TEMPLATE_ID = 1
        CCP().send_template_sms(mobile,[sms_code, 5], 
                                constants.SEND_SMS_TEMPLATE_ID)

        # 10. 響應結果
        return http.JsonResponse({'code': RETCODE.OK, 
                                  'errmsg': '發送短信成功'})