目录
- spring cloud gateway获取请求的真实地址
- 以下是解决办法
- spring cloud的GateWay网关中如何debug得到真实的路由地址
- 总结
spring cloudjs gateway获取请求的真实地址
在使用spring cloud gateway的时候,路由一般配置为服务名
例如 lb://BASE-API-WEB/xxx/bbb 路径,我们无从知道,他真正路由到什么地方去了。
经过查看源码我发现了,
org.springframework.cloud.gateway.filter.LoadBalancerCli开发者_JAVA学习entFilter
这个filter中 对lb请求进行了处理,转换成真正的url地址。
核心方法如下
public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) { //lb下的url URI url = (URI)exchange.getAttribute(ServerWebExchangeUtils.GATEWAY_REQUEST_URL_ATTR); String schemePrefix = (String)exchange.getAttribute(ServerWebExchangeUtils.GATEWAY_SCHEME_PREFIX_ATTR); if (url == null || !"lb".equals(url.getScheme()) && !"lb".equals(schemePrefix)) { return chain.filter(exchange); } else { ServerWebExchangeUtils.addOriginalRequestUrl(exchange, url); log.trace("LoadBalancerClientFilter url before: " + url); ServiceInstance instance = this.loadBalancer.choose(url.getHost()); if (instance == null) { throw new NotFoundException("Unable to find instance for " + url.getHost()); } else { URI uri = exchange.getRequest().getURI(); String overrideScheme = null; if (schemePrefix != null) { overrideScheme = url.getScheme(); } //真实的url URI requestUrl = this.loadBalancer.reconstructURI(new LoadBalancerClientFilter.DelegatingServiceInstance(instance, overrideScheme), uri); log.trace("LoadBalancerClientFilter url chosen: " + requestUrl); exchange.getAttributes().put(ServerWebExchangeUtils.GATEWAY_REQUEST_URL_ATTR, requestUrl); return chain.filter(exchange); } } }
其实,spring cloud gateway 已经打印了日志,但是默认的他是trace级别的,我们常用的日志级别是info级别,所有他不会打印,这就导致了我们在日志中看不到真实的url地址
以下是解决办法
1.在配置文件中设置org.springframework.cloud.gateway.filter.LoadBalancerClientFilter的日志级别
logging.level.org.springframework.cloud.gateway.filter.LoadBalancerClientFilter=TRACE
注意 这里的配置一定要在
logging.level.org.springframework之后配置 不然会覆盖
2.重写LoadBalancerClientFiltehttp://www.devze.comr 建立org.springframework.cloud.gateway.filter包 将 类重写 spingboot默认会从本项目中加载类,原先的类就被弃用了。
3.继承LoadBalancerClientFilter 重写filter方法,将日志级别改为info编程客栈即可
@Override public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) { URI url = exchange.getAttribute(ServerWebExchangeUtils.GATEWAY_REQUEST_URL_ATTR); String schemePrefix = exchange.getAttribute(ServerWebExchangeUtils.GATEWAY_SCHEME_PREFIX_ATTR); if (url == null || !"lb".equals(url.getScheme()) && !"lb".equals(schemePrefix)) { return chain.filter(exchange); } else { ServerWebExchangeUtils.addOriginalRequestUrl(exchange, url); Serhttp://www.devze.comviceInstance instance = this.loadBalancer.choose(url.getHost()); if (instance == null) { throw new NotFoundException("Unable to find instance for " + url.getHost()); } else { URI uri = exchange.getRequest().getURI(); String overrideScheme = null; if (schemePrefix != null) { overrideScheme = url.getScheme(); } URI requestUrl = this.loadBalancer.reconstructURI(new LoadBalancerClientFilterBean.DelegatingServiceInstance(instance, overrideScheme), uri); logger.info("becnbRAqfore url = {} , url chosen = {} " ,url, requestUrl); exchange.getAttributes().put(ServerWebExchangeUtils.GATEWAY_REQUEST_URL_ATTR, requestUrl); return chain.filter(exchange); } } }
最终效果如下 :
spring cloud的GateWay网关中如何debug得到真实的路由地址
org.springframework.cloud.gateway.filter下面的
然后按下 Step over 就得到了 mergedUrl 这个变量,然后就可以看到真实请求的地址了
总结
以上为个人经验,希望能给大家一个参考,也希望大家多多支持我们。
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