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1、问题背景
2、分析源码过程
3、解决办法 最近在测试环境spring cloud gateway突然出现了异常#xff0c;在这里记录一下#xff0c;直接上干货
1、问题背景
测试环境spring cloud gateway遇到以下异常
DataBufferLimitException: Exceeded limit on max bytes t…目录
1、问题背景
2、分析源码过程
3、解决办法 最近在测试环境spring cloud gateway突然出现了异常在这里记录一下直接上干货
1、问题背景
测试环境spring cloud gateway遇到以下异常
DataBufferLimitException: Exceeded limit on max bytes to buffer : 262144超出了缓冲区的最大字节数限制 乍一看问题很简单啊通过配置加大缓存区不就行了啊于是就在application.yml加了以下配置
#将缓存区设置为2m
spring:codec:max-in-memory-size: 2MB
可是问题又出现了通过调试发现配置的max-in-memory-size在程序启动初始化确实是生效的。但是有业务调用的时候此参数的接收值为null,maxInMemorySize还是读取的默认值256K。
那咋整只能从源码入手了。 2、分析源码过程
通过异常日志可以定位到异常位置
后来发现我们自定义的拦截器获取body的信息是获取方式代码如下 因为HandlerStrategies.withDefaults() 是每次都需要重新创建对象并非是spring注入的对象所以每次获取的都是默认值导致配置不生效。 3、解决办法 在我们自定的拦截器中注入ServerCodecConfigurer类通过该类获取配置。这样获取到的就是我们在application.yml中配置的缓存区配置的字节数限制了。 具体代码
Component
Slf4j
public class RequestFilter implements GlobalFilter, Ordered {Overridepublic int getOrder() {return OrderedConstant.HIGHEST_PRECEDENCE;}//手动注入ServerCodecConfigurerAutowiredServerCodecConfigurer codecConfigurer;Overridepublic MonoVoid filter(ServerWebExchange exchange, GatewayFilterChain chain) {StopWatch stopWatch new StopWatch();stopWatch.start();long startTime System.currentTimeMillis();try {final Log logDTO new Log();ServerHttpRequest request exchange.getRequest();// 设置X-Request-IdAtomicReferenceString requestId new AtomicReference(GenerateIdUtils.requestIdWithUUID());ConsumerHttpHeaders httpHeadersConsumer httpHeaders - {String headerRequestId request.getHeaders().getFirst(HeaderConstant.REQUEST_ID);if (!Strings.isNullOrEmpty(headerRequestId)) {requestId.set(headerRequestId);}logDTO.setRequestId(requestId.get());httpHeaders.set(HeaderConstant.REQUEST_ID, requestId.get());httpHeaders.set(HeaderConstant.START_TIME_KEY, String.valueOf(startTime));};// codecConfigurer.getReaders()获取pplication.yml中配置的缓存区配置的字节数ServerRequest serverRequest ServerRequest.create(exchange,codecConfigurer.getReaders());URI requestUri request.getURI();String uriQuery requestUri.getQuery();String url requestUri.getPath() (!Strings.isNullOrEmpty(uriQuery) ? ? uriQuery : );HttpHeaders headers request.getHeaders();MediaType mediaType headers.getContentType();String method request.getMethodValue().toUpperCase();// 原始请求体final AtomicReferenceString requestBody new AtomicReference();final AtomicBoolean newBody new AtomicBoolean(false);if (mediaType ! null LogHelper.isUploadFile(mediaType)) {requestBody.set(上传文件);} else {if (method.equals(GET)) {if (!Strings.isNullOrEmpty(uriQuery)) {requestBody.set(uriQuery);}} else {newBody.set(true);}}logDTO.setLevel(Log.LEVEL.INFO);logDTO.setRequestUrl(url);logDTO.setRequestBody(requestBody.get());logDTO.setRequestMethod(method);logDTO.setIp(IpUtils.getClientIp(request));ServerHttpRequest serverHttpRequest exchange.getRequest().mutate().headers(httpHeadersConsumer).build();ServerWebExchange build exchange.mutate().request(serverHttpRequest).build();return build.getSession().flatMap(webSession - {logDTO.setSessionId(webSession.getId());if (newBody.get() headers.getContentLength() 0) {MonoString bodyToMono serverRequest.bodyToMono(String.class);return bodyToMono.flatMap(reqBody - {logDTO.setRequestBody(reqBody);// 重写原始请求ServerHttpRequestDecorator requestDecorator new ServerHttpRequestDecorator(exchange.getRequest()) {Overridepublic FluxDataBuffer getBody() {NettyDataBufferFactory nettyDataBufferFactory new NettyDataBufferFactory(new UnpooledByteBufAllocator(false));DataBuffer bodyDataBuffer nettyDataBufferFactory.wrap(reqBody.getBytes());return Flux.just(bodyDataBuffer);}};return chain.filter(exchange.mutate().request(requestDecorator).build()).then(LogHelper.doRecord(logDTO));});} else {return chain.filter(exchange).then(LogHelper.doRecord(logDTO));}});} catch (Exception e) {log.error(请求日志打印出现异常, e);return chain.filter(exchange);}}}
