springcloud gateway中打印请求参数，请求路径和返回数据-Toy模板网

这篇具有很好参考价值的文章主要介绍了springcloud gateway中打印请求参数，请求路径和返回数据。希望对大家有所帮助。如果存在错误或未考虑完全的地方，请大家不吝赐教，您也可以点击"举报违法"按钮提交疑问。

请求参数，返回参数，请求路径日志打印

在平时前后端联调过程中，需要查询日志看到前端请求的接口，上送的参数，返回数据这样有利于我们定位问题；话不多说直接上代码。

打印请求路径、请求参数

在gateway模块中，新建一个filter的包，然后创建改类，即可在控制台和日志文件里面打印出请求参数，只写了常用的post和get请求的方式；

/**
 * @author 
 * @date 2023/2/3 - 10:54
 * @描述 请求参数日志打印
 */
@Component
@Slf4j
@AllArgsConstructor
public class HttpRequestFilter implements GlobalFilter, Ordered {
    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
        ServerHttpRequest request = exchange.getRequest();
        String method = request.getMethodValue();
        String contentType = request.getHeaders().getFirst("Content-Type");
        String url = JSONObject.toJSONString(request.getURI());
        log.info("网关请求路径: "+url);// 请求路径打印
        if ("POST".equals(method)) {
            return DataBufferUtils.join(exchange.getRequest().getBody())
                    .flatMap(dataBuffer -> {
                        byte[] bytes = new byte[dataBuffer.readableByteCount()];
                        dataBuffer.read(bytes);
                        try {
                            String bodyString = new String(bytes, "utf-8");
                            log.info("请求参数: "+bodyString);//打印请求参数
                            exchange.getAttributes().put("POST_BODY", bodyString);
                        } catch (UnsupportedEncodingException e) {
                            e.printStackTrace();
                        }
                        DataBufferUtils.release(dataBuffer);
                        Flux<DataBuffer> cachedFlux = Flux.defer(() -> {
                            DataBuffer buffer = exchange.getResponse().bufferFactory()
                                    .wrap(bytes);
                            return Mono.just(buffer);
                        });
                        ServerHttpRequest mutatedRequest = new ServerHttpRequestDecorator(
                                exchange.getRequest()) {
                            @Override
                            public Flux<DataBuffer> getBody() {
                                return cachedFlux;
                            }
                        };
                        return chain.filter(exchange.mutate().request(mutatedRequest)
                                .build());
                    });
        }else if ("GET".equals(method)) {
            MultiValueMap<String, String> queryParams = request.getQueryParams();
            log.info("请求参数：" + queryParams);
            log.info("****************************************************************************\n");
            return chain.filter(exchange);
        }
        log.info("****************************************************************************\n");
        return chain.filter(exchange);
    }
    @Override
    public int getOrder() {
        return -200;
    }
}

返回参数打印


/**
 * @author 
 * @date 2023/2/3 - 10:54
 * @描述 返回参数日志打印
 */

@Component
public class WrapperResponseGlobalFilter implements GlobalFilter, Ordered {

    private static final Logger log = LoggerFactory.getLogger(WrapperResponseGlobalFilter.class);

    @Override
    public int getOrder() {
        // -1 is response write filter, must be called before that
        return -2;
    }

    private static Joiner joiner = Joiner.on("");

    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
        ServerHttpResponse originalResponse = exchange.getResponse();
        DataBufferFactory bufferFactory = originalResponse.bufferFactory();
        ServerHttpResponseDecorator response = new ServerHttpResponseDecorator(originalResponse) {
            @Override
            public Mono<Void> writeWith(Publisher<? extends DataBuffer> body) {
                if (getStatusCode().equals(HttpStatus.OK) && body instanceof Flux) {
                    // 获取ContentType，判断是否返回JSON格式数据
                    String originalResponseContentType = exchange.getAttribute(ORIGINAL_RESPONSE_CONTENT_TYPE_ATTR);
                    if (StringUtils.isNotBlank(originalResponseContentType) && originalResponseContentType.contains("application/json")) {
                        Flux<? extends DataBuffer> fluxBody = Flux.from(body);
                        //（返回数据内如果字符串过大，默认会切割）解决返回体分段传输
                        return super.writeWith(fluxBody.buffer().map(dataBuffers -> {
                            List<String> list = Lists.newArrayList();
                            dataBuffers.forEach(dataBuffer -> {
                                try {
                                    byte[] content = new byte[dataBuffer.readableByteCount()];
                                    dataBuffer.read(content);
                                    DataBufferUtils.release(dataBuffer);
                                    list.add(new String(content, "utf-8"));
                                } catch (Exception e) {
                                    log.info("加载Response字节流异常，失败原因：{}", Throwables.getStackTraceAsString(e));
                                }
                            });
                            String responseData = joiner.join(list);

                            log.info("返回参数responseData："+responseData);
                            //System.out.println("responseData："+responseData);


                            byte[] uppedContent = new String(responseData.getBytes(), Charset.forName("UTF-8")).getBytes();
                            originalResponse.getHeaders().setContentLength(uppedContent.length);
                            return bufferFactory.wrap(uppedContent);
                        }));
                    }
                }
                return super.writeWith(body);
            }

            @Override
            public Mono<Void> writeAndFlushWith(Publisher<? extends Publisher<? extends DataBuffer>> body) {
                return writeWith(Flux.from(body).flatMapSequential(p -> p));
            }
        };
        return chain.filter(exchange.mutate().response(response).build());
    }


}