12.18 aop身份验证

对所有卖家页面进行身份验证,采用aop编程

步骤:1.获得request 

2.查询cookie

3.查询redis

4.查询不通过时,采用抛出异常,捕捉异常,再异常里加入跳转到登陆页面的方法

准备工作:

创建异常方法,可以不添加内容

public class SellerAuthorizeException extends RuntimeException {
}

　　aop编程

@Aspect
@Component
@Slf4j
public class SellerAuthorizeAspect {

    @Autowired
    private StringRedisTemplate redisTemplate;

    @Pointcut("execution(public * com.imooc.controller.Seller*.*(..))" +
    "&& !execution(public * com.imooc.controller.SellerUserController.*(..))")
    public void verify() {}//定义切面范围包含与不包含的

    @Before("verify()")
    public void doVerify() {
        ServletRequestAttributes attributes = (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
        HttpServletRequest request = attributes.getRequest();

        //查询cookie
        Cookie cookie = CookieUtil.get(request, CookieConstant.TOKEN);
        if (cookie == null) {
            log.warn("【登录校验】Cookie中查不到token");
            throw new SellerAuthorizeException();
        }

        //去redis里查询
        String tokenValue = redisTemplate.opsForValue().get(String.format(RedisConstant.TOKEN_PREFIX, cookie.getValue()));
        if (StringUtils.isEmpty(tokenValue)) {
            log.warn("【登录校验】Redis中查不到token");
            throw new SellerAuthorizeException();
        }
    }
}

　　登陆异常异常捕捉并加入跳转方法

@ControllerAdvice
public class SellExceptionHandler {

    @Autowired
    private ProjectUrlConfig projectUrlConfig;

    //拦截登录异常
    //http://sell.natapp4.cc/sell/wechat/qrAuthorize?returnUrl=http://sell.natapp4.cc/sell/seller/login
    @ExceptionHandler(value = SellerAuthorizeException.class)
    public ModelAndView handlerAuthorizeException() {
        return new ModelAndView("redirect:"
        .concat(projectUrlConfig.getWechatOpenAuthorize())
        .concat("/sell/wechat/qrAuthorize")
        .concat("?returnUrl=")
        .concat(projectUrlConfig.getSell())
        .concat("/sell/seller/login"));
    }
}