spring cloud gateway Filter拦截器

@Component
@Slf4j
public class CustomGlobalFilter implements GlobalFilter, Ordered {
    private static List<String> IP_WHILE_LIST = Arrays.asList("127.0.0.1");
    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
//    记录并处理请求
        ServerHttpRequest request = exchange.getRequest();
//        请求日志
        String sourceAddress = request.getLocalAddress().getHostString();
        log.info("请求来源地址ip " + sourceAddress);
        log.info("请求来源地址 " + request.getRemoteAddress());
        log.info("请求类型 " + request.getMethod());
        log.info("请求地址 " + request.getPath());
        log.info("请求参数 " + request.getQueryParams());
//        log.info("请求header" + request.getHeaders());
        return handleResponse(exchange, chain);
    }
    /**
     * 处理响应
     *
     * @param exchange
     * @param chain
     * @return
     */
    public Mono<Void> handleResponse(ServerWebExchange exchange, GatewayFilterChain chain) {
        try {
            ServerHttpResponse originalResponse = exchange.getResponse();
            // 缓存数据的工厂
            DataBufferFactory bufferFactory = originalResponse.bufferFactory();
            // 拿到响应码
            HttpStatusCode statusCode = originalResponse.getStatusCode();
            if (statusCode == HttpStatus.OK) {
                // 装饰，增强能力
                ServerHttpResponseDecorator decoratedResponse = new ServerHttpResponseDecorator(originalResponse) {
                    // 等调用完转发的接口后才会执行
                    @Override
                    public Mono<Void> writeWith(Publisher<? extends DataBuffer> body) {
                        log.info("body instanceof Flux: {}", (body instanceof Flux));
                        if (body instanceof Flux) {
                            Flux<? extends DataBuffer> fluxBody = Flux.from(body);
                            // 往返回值里写数据
                            // 拼接字符串
                            return super.writeWith(
                                    fluxBody.map(dataBuffer -> {
                                        byte[] content = new byte[dataBuffer.readableByteCount()];
                                        dataBuffer.read(content);
                                        DataBufferUtils.release(dataBuffer);//释放掉内存
                                        // 构建日志
                                        StringBuilder sb2 = new StringBuilder(200);
                                        List<Object> rspArgs = new ArrayList<>();
                                        rspArgs.add(originalResponse.getStatusCode());
                                        String data = new String(content, StandardCharsets.UTF_8); //data
                                        sb2.append(data);
                                        // 打印日志
                                        log.info("响应结果：" + data);
                                        return bufferFactory.wrap(content);
                                    }));
                        } else {
                            // 8. 调用失败，返回一个规范的错误码
                            log.error("<--- {} 响应code异常", getStatusCode());
                        }
                        return super.writeWith(body);
                    }
                };
                // 设置 response 对象为装饰过的
                return chain.filter(exchange.mutate().response(decoratedResponse).build());
            }
            return chain.filter(exchange); // 降级处理返回数据
        } catch (Exception e) {
            log.error("网关处理响应异常" + e);
            return chain.filter(exchange);
        }
    }
}