springboot基于过滤器实现接口请求耗时统计操作

Spring Boot中实现一个过滤器相当简单，实现javax.servlet.Filter接口即可。

下面以实现一个记录接口访问日志及请求耗时的过滤器为例：

1、定义ApiAccessFilter类，并实现Filter接口

@Slf4j@WebFilter(filterName = 'ApiAccessFilter', urlPatterns = '/*')public class ApiAccessFilter implements Filter { @Override public void init(FilterConfig filterConfig) { } @Override public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException { HttpServletRequest request = (HttpServletRequest) servletRequest; Long requestId = IdGenUtils.nextIdByMem(); // 请求ID，这个是我业务中的id，大家可自行决定是否需要 long start = System.currentTimeMillis(); // 请求进入时间 log.info('[Api Access] start. id: {}, uri: {}, method: {}, client: {}', requestId, request.getRequestURI(), request.getMethod(), getIP(request)); filterChain.doFilter(servletRequest, servletResponse); log.info('[Api Access] end. id: {}, duration: {}ms', requestId, System.currentTimeMillis() - start); } @Override public void destroy() { } /** * 获取IP地址 * * @param request 请求 * @return request发起客户端的IP地址 */ private String getIP(HttpServletRequest request) { if (request == null) { return '0.0.0.0'; } String Xip = request.getHeader('X-Real-IP'); String XFor = request.getHeader('X-Forwarded-For'); String UNKNOWN_IP = 'unknown'; if (StringUtils.isNotEmpty(XFor) && !UNKNOWN_IP.equalsIgnoreCase(XFor)) { //多次反向代理后会有多个ip值，第一个ip才是真实ip int index = XFor.indexOf(','); if (index != -1) {return XFor.substring(0, index); } else {return XFor; } } XFor = Xip; if (StringUtils.isNotEmpty(XFor) && !UNKNOWN_IP.equalsIgnoreCase(XFor)) { return XFor; } if (StringUtils.isBlank(XFor) || UNKNOWN_IP.equalsIgnoreCase(XFor)) { XFor = request.getHeader('Proxy-Client-IP'); } if (StringUtils.isBlank(XFor) || UNKNOWN_IP.equalsIgnoreCase(XFor)) { XFor = request.getHeader('WL-Proxy-Client-IP'); } if (StringUtils.isBlank(XFor) || UNKNOWN_IP.equalsIgnoreCase(XFor)) { XFor = request.getHeader('HTTP_CLIENT_IP'); } if (StringUtils.isBlank(XFor) || UNKNOWN_IP.equalsIgnoreCase(XFor)) { XFor = request.getHeader('HTTP_X_FORWARDED_FOR'); } if (StringUtils.isBlank(XFor) || UNKNOWN_IP.equalsIgnoreCase(XFor)) { XFor = request.getRemoteAddr(); } return XFor; }}

2、启用该过滤器

springboot中两种启用过滤器的方式，第一种在FilterRegistrationBean中注册该Filter，第二种，采用注解的方式启用

个人觉得注册方式比较麻烦，所有本例中使用的是第二种。

在Filter中添加注解@WebFilter(filterName = 'ApiAccessFilter', urlPatterns = '/*')，配置了过滤器名和需要过滤的请求地址，/*表示过滤所有请求。然后在启动类上，通过@ServletComponentScan注解，指明该过滤器即可

@SpringBootApplication@ServletComponentScan('com.yclouds.service.demo')public class YCloudsServiceDemoApplication { public static void main(String[] args) { SpringApplication.run(YCloudsServiceDemoApplication.class, args); }}

3、效果展示

发送了两次http请求，每次都会打印日志内容，并且统计了整个请求的耗时情况。

GitHub地址：https://github.com/ye17186/spring-boot-learn

补充知识：spring cloud gateway 之zuul通过filter配置接口请求的时间耗时记录到日志

zuul中的Filter的配置,zuul中提供了三种类型的Filter,preFilter,routeFilter和postFilter,分别对应请求中的不同的阶段,针对同一个请求,有一个RequestContext对象,在三个阶段的Filter中进行共享

假设我们要开发一个统计请求时间的功能,需要在preFilter里边记录开始时间,并将整个开始时间放在RequestContext中,在postFilter里边拿到开始时间,用当前的时间减去开始时间,就是请求执行的时间

定义一个preFilter:

package com.jiaoyiping.springcloud.zuul.filter; import com.netflix.zuul.ZuulFilter;import com.netflix.zuul.context.RequestContext;import com.netflix.zuul.exception.ZuulException;import org.slf4j.Logger;import org.slf4j.LoggerFactory;import org.springframework.cloud.netflix.zuul.filters.support.FilterConstants; /** * Created with Intellij IDEA * * @author: * Mail: * Date: * Time: * To change this template use File | Settings | Editor | File and Code Templates */ public class TimeCostPreFilter extends ZuulFilter { public static final String START_TIME_KEY = 'start_time'; private Logger logger = LoggerFactory.getLogger(TimeCostPreFilter.class); @Override public String filterType() { return FilterConstants.PRE_TYPE; } @Override public int filterOrder() { return 0; } /** * 判断是否要拦截的逻辑 * * @return */ @Override public boolean shouldFilter() { return true; } @Override public Object run() throws ZuulException { long startTime = System.currentTimeMillis(); RequestContext.getCurrentContext().set(START_TIME_KEY, startTime); return null; }}

定义以postFilter:

package com.jiaoyiping.springcloud.zuul.filter; import com.netflix.zuul.ZuulFilter;import com.netflix.zuul.context.RequestContext;import com.netflix.zuul.exception.ZuulException;import org.slf4j.Logger;import org.slf4j.LoggerFactory;import org.springframework.cloud.netflix.zuul.filters.support.FilterConstants; /** * Created with Intellij IDEA * * @author: * Mail: * Date: * Time: * To change this template use File | Settings | Editor | File and Code Templates */ public class TimeCostPostFilter extends ZuulFilter { private static final String START_TIME_KE = 'start_time'; private Logger logger = LoggerFactory.getLogger(TimeCostPostFilter.class); @Override public String filterType() { return FilterConstants.POST_TYPE; } @Override public int filterOrder() { return 0; } @Override public boolean shouldFilter() { return true; } @Override public Object run() throws ZuulException { long startTime = (long) RequestContext.getCurrentContext().get(START_TIME_KE); logger.info('请求完成,耗时{}秒', (System.currentTimeMillis() - startTime) / 1000); return null; }}

在一个配置类中将这两个Filter注入:

package com.jiaoyiping.springcloud.zuul.config; import com.jiaoyiping.springcloud.zuul.filter.PDSFilter;import com.jiaoyiping.springcloud.zuul.filter.TimeCostPostFilter;import com.jiaoyiping.springcloud.zuul.filter.TimeCostPreFilter;import com.netflix.zuul.ZuulFilter;import org.springframework.context.annotation.Bean;import org.springframework.context.annotation.Configuration; /** * Created with Intellij IDEA * * @author: * Mail: * Date: * Time: * To change this template use File | Settings | Editor | File and Code Templates */@Configurationpublic class FilterConfig { @Bean public ZuulFilter timeCostPreFilter() { return new TimeCostPreFilter(); } @Bean public ZuulFilter timeCostPostFilter() { return new TimeCostPostFilter(); } @Bean public ZuulFilter pdsFilter() { return new PDSFilter(); }}

启动项目,可以发现,zuul网关已经注册到了eureka上:

请求provide对应的地址,发现,zuul可以成功地调用eureka上对应的服务,并将结果正确返回:

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