SpringCloud Gateway鉴权和跨域解决方案

<dependency>
  <groupId>io.jsonwebtoken</groupId>
   <artifactId>jjwt</artifactId>
</dependency>
<dependency>
    <groupId>com.alibaba</groupId>
    <artifactId>fastjson</artifactId>
    <version>RELEASE</version>
</dependency>
<dependency>
  <groupId>org.springframework.cloud</groupId>
  <artifactId>spring-cloud-starter-gateway</artifactId>
</dependency>

@Configuration
@Component
public class AuthGlobalFilter implements GlobalFilter, Ordered {
    @Autowired
    JwtTokenUtil jwtTokenUtil;
    @Autowired(required = false)
    JedisUtil jedisUtil;

    private String cachePrefix = "km-gateway-";
    @Value("${spring.redis.expired}")
    private Integer expiredSecond;//600000,10m

    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
        ServerHttpRequest request = exchange.getRequest();
        HttpHeaders httpHeaders = request.getHeaders();
        exchange.getRequest().getURI();
        String requestUri = request.getPath().pathWithinApplication().value();
        String token = null;
        if (httpHeaders != null && httpHeaders.containsKey("token") && !httpHeaders.get("token").isEmpty()) {
            token = httpHeaders.get("token").get(0);
        }
//        AuthenticateRequest
        if (StringUtil.isBlank(token)) {
//            String message = "You current request uri do not have permission or auth.";
//            return getVoidMono(exchange, message);
            return chain.filter(exchange);
        }
        String userAccountId = jwtTokenUtil.getUserAccountIdFromToken(token);
        boolean hasPermission = checkPermission(userAccountId, requestUri);
        String username = jwtTokenUtil.getUsernameFromToken(token);
        String redisSetUrlKey = cachePrefix.concat("url-").concat(username);
        //  log.info("###### hasPermission.2=" + hasPermission);
        if (hasPermission) {
            jedisUtil.SetAndTime(redisSetUrlKey, expiredSecond, requestUri);
        } else {
            String message = "You current request uri do not have permission or auth.";
            // log.warn(message);
            return getVoidMono(exchange, message);
        }
        jwtTokenUtil.isValid(token);
        return chain.filter(exchange);
    }

    @Override
    public int getOrder() {
        return 0;
    }
   //根据角色权限进行权限控制
    private boolean checkPermission(String userId, String requestUrl) {
        return false;
    }

    private Mono<Void> getVoidMono(ServerWebExchange exchange, String body) {
        exchange.getResponse().setStatusCode(HttpStatus.OK);
        byte[] bytes = body.getBytes(StandardCharsets.UTF_8);
        DataBuffer buffer = exchange.getResponse().bufferFactory().wrap(bytes);
        return exchange.getResponse().writeWith(Flux.just(buffer));
    }
}