全局记录Feign的请求和响应日志方式

作者:北亮bl 时间:2021-08-19 18:48:02 

项目里使用了Feign进行远程调用,有时为了问题排查,需要开启请求和响应日志

下面简介一下如何开启Feign日志:

注:本文基于

  • spring-boot-starter-parent 2.3.4.RELEASE

  • spring-cloud-starter-openfeign 2.2.3.RELEASE

1、项目里定义FeignClient接口

package com.example.demo.feign;
import org.springframework.cloud.openfeign.FeignClient;
import org.springframework.web.bind.annotation.GetMapping;
@FeignClient(name = "deom", url = "https://www.baidu.com")
public interface FeignDemo {
   @GetMapping("/")
   String test();
}

2、单个FeignClient接口开启日志

在 application.yml 里指定Feign接口日志级别为DEBUG,类型为FULL:

注:com.example.demo.feign.FeignDemo就是上面定义的FeignClient接口

logging:
 level:
   com.example.demo.feign.FeignDemo: debug
# 下面的配置,也可以写代码代替
# @Bean
# public Logger.Level level() { return Logger.Level.FULL; }
feign:
 client:
   config:
     default:
       loggerLevel: full

OK了,重启项目,调用 FeignDemo.test() 方法后,会输出如下日志:

2020-10-13 11:46:24.161 DEBUG 20824 --- [nio-8080-exec-4] com.example.demo.feign.FeignDemo         : [FeignDemo#test] ---> GET https://www.baidu.com HTTP/1.1
2020-10-13 11:46:24.162 DEBUG 20824 --- [nio-8080-exec-4] com.example.demo.feign.FeignDemo         : [FeignDemo#test] ---> END HTTP (0-byte body)
2020-10-13 11:46:24.255 DEBUG 20824 --- [nio-8080-exec-4] com.example.demo.feign.FeignDemo         : [FeignDemo#test] <--- HTTP/1.1 200 OK (93ms)
2020-10-13 11:46:24.255 DEBUG 20824 --- [nio-8080-exec-4] com.example.demo.feign.FeignDemo         : [FeignDemo#test] content-length: 2443
2020-10-13 11:46:24.255 DEBUG 20824 --- [nio-8080-exec-4] com.example.demo.feign.FeignDemo         : [FeignDemo#test] content-type: text/html
2020-10-13 11:46:24.256 DEBUG 20824 --- [nio-8080-exec-4] com.example.demo.feign.FeignDemo         : [FeignDemo#test] date: Tue, 13 Oct 2020 03:46:24 GMT
2020-10-13 11:46:24.256 DEBUG 20824 --- [nio-8080-exec-4] com.example.demo.feign.FeignDemo         : [FeignDemo#test] server: bfe
2020-10-13 11:46:24.256 DEBUG 20824 --- [nio-8080-exec-4] com.example.demo.feign.FeignDemo         : [FeignDemo#test] 
2020-10-13 11:46:24.257 DEBUG 20824 --- [nio-8080-exec-4] com.example.demo.feign.FeignDemo         : [FeignDemo#test] <!DOCTYPE html>
<!--STATUS OK--><html> <head><meta http-equiv=content-type content=text/html;charset=utf-8><meta http-equiv=X-UA-Compatible content=IE=Edge><meta content=always name=referrer><link rel=stylesheet type=text/css href=https://ss1.bdstatic.com/5eN1bjq8AAUYm2zgoY3K/r/www/cache/bdorz/baidu.min.css><title>百度一下,你就知道</title></head> <body link=#0000cc> <div id=wrapper> <div id=head> <div class=head_wrapper> <div class=s_form> <div class=s_form_wrapper> <div id=lg> <img hidefocus=true src=//www.baidu.com/img/bd_logo1.png width=270 height=129> </div> <form id=form name=f action=//www.baidu.com/s class=fm> <input type=hidden name=bdorz_come value=1> <input type=hidden name=ie value=utf-8> <input type=hidden name=f value=8> <input type=hidden name=rsv_bp value=1> <input type=hidden name=rsv_idx value=1> <input type=hidden name=tn value=baidu><span class="bg s_ipt_wr"><input id=kw name=wd class=s_ipt value maxlength=255 autocomplete=off autofocus=autofocus></span><span class="bg s_btn_wr"><input type=submit id=su value=百度一下 class="bg s_btn" autofocus></span> </form> </div> </div> <div id=u1> <a href=http://news.baidu.com name=tj_trnews class=mnav>新闻</a> <a href=https://www.hao123.com name=tj_trhao123 class=mnav>hao123</a> <a href=http://map.baidu.com name=tj_trmap class=mnav>地图</a> <a href=http://v.baidu.com name=tj_trvideo class=mnav>视频</a> <a href=http://tieba.baidu.com name=tj_trtieba class=mnav>贴吧</a> <noscript> <a href=http://www.baidu.com/bdorz/login.gif?login&amp;tpl=mn&amp;u=http%3A%2F%2Fwww.baidu.com%2f%3fbdorz_come%3d1 name=tj_login class=lb>登录</a> </noscript> <script>document.write('<a href="http://www.baidu.com/bdorz/login.gif?login&tpl=mn&u='+ encodeURIComponent(window.location.href+ (window.location.search === "" ? "?" : "&")+ "bdorz_come=1")+ '" name="tj_login" class="lb">登录</a>');
                </script> <a href=//www.baidu.com/more/ name=tj_briicon class=bri style="display: block;">更多产品</a> </div> </div> </div> <div id=ftCon> <div id=ftConw> <p id=lh> <a href=http://home.baidu.com>关于百度</a> <a href=http://ir.baidu.com>About Baidu</a> </p> <p id=cp>&copy;2017&nbsp;Baidu&nbsp;<a href=http://www.baidu.com/duty/>使用百度前必读</a>&nbsp; <a href=http://jianyi.baidu.com/ class=cp-feedback>意见反馈</a>&nbsp;京ICP证030173号&nbsp; <img src=//www.baidu.com/img/gs.gif> </p> </div> </div> </div> </body> </html>

3、所有FeignClient接口 开启日志

上面的方法,只能开启单个FeignClient接口,如果项目里有10个接口,那么要在yml里配置10项,而且以后添加新的FeignClient,还要记得去修改yml配置,太麻烦。

所以,下面是开启所有FeignClient接口日志的配置:

3.1、修改FeignConfiguration

自定义feign.Logger,如下:

package com.example.demo.cacheDemo;
import feign.slf4j.Slf4jLogger;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
@Configuration
public class FeignConfiguration {
   @Bean
   public feign.Logger logger() {
       return new Slf4jLogger();
   }
}

3.2、还是修改 application.yml 配置

logging:
 level:
   # 删除具体的FeignClient接口配置,只保留这一个就好了
   feign.Logger: debug
# 也可以写代码代替
# @Bean
# public Logger.Level level() { return Logger.Level.FULL; }
feign:
 client:
   config:
     default:
       loggerLevel: full

3.3、OK了,此时项目里

不管新增多少个 FeignClient,都会输出日志。

4、重写FeignClient输出日志

根据上面输出的日志,可以看到是多条INFO日志,在并发时,很有可能会互相干扰,而且格式也无法调整。

我们知道,Feign默认情况下,是使用 feign.Client.Default 发起http请求;

我们可以重写Client,并注入Bean来替换掉 feign.Client.Default,从而实现日志记录,当然也可以做其它任意事情了,比如添加Header。下面是注入Bean的代码:

// 默认不注入,如果yml配置里有 logging.level.beinet.cn.demostudy.MyClient 才注入
@Bean
@ConditionalOnProperty("logging.level.beinet.cn.demostudy.MyClient")
MyClient getClient() throws NoSuchAlgorithmException, KeyManagementException {
   // 忽略SSL校验
   SSLContext ctx = SSLContext.getInstance("SSL");
   X509TrustManager tm = new X509TrustManager() {
       @Override
       public void checkClientTrusted(X509Certificate[] chain, String authType) {
       }
       @Override
       public void checkServerTrusted(X509Certificate[] chain, String authType) {
       }
       @Override
       public X509Certificate[] getAcceptedIssuers() {
           return null;
       }
   };
   ctx.init(null, new TrustManager[]{tm}, null);
   return new MyClient(ctx.getSocketFactory(), (hostname, sslSession) -> true);
}

下面是重写的Client完整代码:

package beinet.cn.demostudy;
import feign.Client;
import feign.Request;
import feign.Response;
import lombok.extern.slf4j.Slf4j;
import org.springframework.util.StreamUtils;
import javax.net.ssl.HostnameVerifier;
import javax.net.ssl.SSLSocketFactory;
import java.io.*;
import java.util.Collection;
import java.util.Map;
@Slf4j
public class MyClient extends Client.Default {
   public MyClient(SSLSocketFactory socketFactory, HostnameVerifier hostnameVerifier) {
       super(socketFactory, hostnameVerifier);
   }
   @Override
   public Response execute(Request request, Request.Options options) throws IOException {
       StringBuilder sb = new StringBuilder("[log started]\r\n");
       sb.append(request.httpMethod()).append(" ").append(request.url()).append("\r\n");
       CombineHeaders(sb, request.headers()); // 请求Header
       CombineBody(sb, request.body());
       long costTime = -1;
       Exception exception = null;
       BufferingFeignClientResponse response = null;
       long begin = System.currentTimeMillis();
       try {
           response = new BufferingFeignClientResponse(super.execute(request, options));
           costTime = (System.currentTimeMillis() - begin);
       } catch (Exception exp) {
           costTime = (System.currentTimeMillis() - begin);
           exception = exp;
           throw exp;
       } finally {
           sb.append("\r\nResponse cost time(ms): ").append(String.valueOf(costTime));
           if (response != null)
               sb.append("  status: ").append(response.status());
           sb.append("\r\n");
           if (response != null) {
               CombineHeaders(sb, response.headers()); // 响应Header
               sb.append("Body:\r\n").append(response.body()).append("\r\n");
           }
           if (exception != null) {
               sb.append("Exception:\r\n  ").append(exception.getMessage()).append("\r\n");
           }
           sb.append("\r\n[log ended]");
           log.debug(sb.toString());
       }
       Response ret = response.getResponse().toBuilder()
               .body(response.getBody(),
                       response.getResponse().body().length()).build();
       response.close();
       return ret;
   }
   private static void CombineHeaders(StringBuilder sb, Map<String, Collection<String>> headers) {
       if (headers != null && !headers.isEmpty()) {
           sb.append("Headers:\r\n");
           for (Map.Entry<String, Collection<String>> ob : headers.entrySet()) {
               for (String val : ob.getValue()) {
                   sb.append("  ").append(ob.getKey()).append(": ").append(val).append("\r\n");
               }
           }
       }
   }
   private static void CombineBody(StringBuilder sb, byte[] body) {
       if (body == null || body.length <= 0)
           return;
       sb.append("Body:\r\n").append(new String(body)).append("\r\n");
   }
   static final class BufferingFeignClientResponse implements Closeable {
       private Response response;
       private byte[] body;
       private BufferingFeignClientResponse(Response response) {
           this.response = response;
       }
       private Response getResponse() {
           return this.response;
       }
       private int status() {
           return this.response.status();
       }
       private Map<String, Collection<String>> headers() {
           return this.response.headers();
       }
       private String body() throws IOException {
           StringBuilder sb = new StringBuilder();
           try (InputStreamReader reader = new InputStreamReader(getBody())) {
               char[] tmp = new char[1024];
               int len;
               while ((len = reader.read(tmp, 0, tmp.length)) != -1) {
                   sb.append(new String(tmp, 0, len));
               }
           }
           return sb.toString();
       }
       private InputStream getBody() throws IOException {
           if (this.body == null) {
               this.body = StreamUtils.copyToByteArray(this.response.body().asInputStream());
           }
           return new ByteArrayInputStream(this.body);
       }
       @Override
       public void close() {
           this.response.close();
       }
   }
}

输出日志示例:

2020-10-15 16:48:26.081 DEBUG 15664 --- [           main] beinet.cn.demostudy.MyClient             : [log started]
POST https://www.baidu.com?flg=3
Headers:
  Content-Length: 14
  Content-Type: text/plain;charset=UTF-8
Body:
abcde我是ddd

Response cost time(ms): 207  status: 200
Headers:
  content-length: 2443
  content-type: text/html
  date: Thu, 15 Oct 2020 08:48:27 GMT
  server: bfe
Body:
<!DOCTYPE html>百度的html</html>

5、使用Aspect切面输出日志

这个不推荐,因为它无法打印出具体的url、header等数据,大家可以参考:

不需要yml配置,直接在项目里添加如下代码即可:

package com.example.demo.feign;
import com.fasterxml.jackson.databind.ObjectMapper;
import lombok.Data;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.lang.ProceedingJoinPoint;
import org.aspectj.lang.annotation.Around;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.stereotype.Component;
@Aspect
@Component
@Slf4j
public class FeignAspect {
   // 这个也行 @Pointcut("@annotation(org.springframework.web.bind.annotation.PostMapping)")
   // 参考 https://github.com/spring-cloud/spring-cloud-openfeign/issues/322
   @Pointcut("@within(org.springframework.cloud.openfeign.FeignClient)")
   public void feignClientPointcut() {
   }
   @Around("feignClientPointcut()")
   public Object feignAround(ProceedingJoinPoint joinPoint) throws Throwable {
       return logAround(joinPoint);
   }
   private static ObjectMapper mapper = new ObjectMapper();
   private Object logAround(ProceedingJoinPoint point) throws Throwable {
       long beginTime = System.currentTimeMillis();
       Object result = null;
       Exception exception = null;
       try {
           result = point.proceed();
       } catch (Exception exp) {
           exception = exp;
       }
       long time = System.currentTimeMillis() - beginTime;
       saveLog(point, result, exception, time);
       if (exception != null) {
           throw exception;
       }
       return result;
   }
   private static void saveLog(ProceedingJoinPoint joinPoint, Object result, Exception exception, long time) {
       Dto dto = new Dto();
       dto.setCostTime(time);
       try {
           if (exception != null) {
               dto.setExp(exception.toString());
           }
           if (result != null) {
               dto.setResult(serial(result));
           }
           MethodSignature signature = (MethodSignature) joinPoint.getSignature();
           //请求的 类名、方法名
           String className = joinPoint.getTarget().getClass().getName();
           String signName = signature.getDeclaringTypeName();
           if (!signName.equalsIgnoreCase(className))
               signName += "|" + className;
           dto.setClas(signName);
           String methodName = signature.getName();
           dto.setMethod(methodName);
           //请求的参数
           Object[] args = joinPoint.getArgs();
           if (args != null && args.length > 0) {
               dto.setPara(serial(args));
           }
       } catch (Exception e) {
           dto.setExp(e.toString());
       }
       if (exception != null) {
           log.warn(dto.toString());
       } else {
           log.info(dto.toString());
       }
   }
   private static String serial(Object obj) {
       try {
           return mapper.writeValueAsString(obj);
       } catch (Exception ex) {
           return obj.toString();
       }
   }
   @Data
   private static class Dto {
       /**
        * 调用类名
        */
       private String clas;
       /**
        * 调用方法名
        */
       private String method;
       /**
        * 调用的参数
        */
       private String para;
       /**
        * 方法返回结果
        */
       private String result;
       /**
        * 执行时长,毫秒
        */
       private long costTime;
       /**
        * 备注
        */
       private String remark;
       /**
        * 出现的异常
        */
       private String exp;
   }
}

OK,输出的日志如下:

2020-10-13 14:24:48.321  INFO 21304 --- [nio-8080-exec-3] com.example.demo.feign.FeignAspect       : FeignAspect.Dto(clas=com.example.demo.feign.FeignDemo|com.sun.proxy.$Proxy72, method=test, para=null, result="<!DOCTYPE html>\r\n<!--STATUS OK--><html> <head><meta http-equiv=content-type content=text/html;charset=utf-8><meta http-equiv=X-UA-Compatible content=IE=Edge><meta content=always name=referrer><link rel=stylesheet type=text/css href=https://ss1.bdstatic.com/5eN1bjq8AAUYm2zgoY3K/r/www/cache/bdorz/baidu.min.css><title>百度一下,你就知道</title></head> <body link=#0000cc> <div id=wrapper> <div id=head> <div class=head_wrapper> <div class=s_form> <div class=s_form_wrapper> <div id=lg> <img hidefocus=true src=//www.baidu.com/img/bd_logo1.png width=270 height=129> </div> <form id=form name=f action=//www.baidu.com/s class=fm> <input type=hidden name=bdorz_come value=1> <input type=hidden name=ie value=utf-8> <input type=hidden name=f value=8> <input type=hidden name=rsv_bp value=1> <input type=hidden name=rsv_idx value=1> <input type=hidden name=tn value=baidu><span class=\"bg s_ipt_wr\"><input id=kw name=wd class=s_ipt value maxlength=255 autocomplete=off autofocus=autofocus></span><span class=\"bg s_btn_wr\"><input type=submit id=su value=百度一下 class=\"bg s_btn\" autofocus></span> </form> </div> </div> <div id=u1> <a href=http://news.baidu.com name=tj_trnews class=mnav>新闻</a> <a href=https://www.hao123.com name=tj_trhao123 class=mnav>hao123</a> <a href=http://map.baidu.com name=tj_trmap class=mnav>地图</a> <a href=http://v.baidu.com name=tj_trvideo class=mnav>视频</a> <a href=http://tieba.baidu.com name=tj_trtieba class=mnav>贴吧</a> <noscript> <a href=http://www.baidu.com/bdorz/login.gif?login&amp;tpl=mn&amp;u=http%3A%2F%2Fwww.baidu.com%2f%3fbdorz_come%3d1 name=tj_login class=lb>登录</a> </noscript> <script>document.write('<a href=\"http://www.baidu.com/bdorz/login.gif?login&tpl=mn&u='+ encodeURIComponent(window.location.href+ (window.location.search === \"\" ? \"?\" : \"&\")+ \"bdorz_come=1\")+ '\" name=\"tj_login\" class=\"lb\">登录</a>');\r\n                </script> <a href=//www.baidu.com/more/ name=tj_briicon class=bri style=\"display: block;\">更多产品</a> </div> </div> </div> <div id=ftCon> <div id=ftConw> <p id=lh> <a href=http://home.baidu.com>关于百度</a> <a href=http://ir.baidu.com>About Baidu</a> </p> <p id=cp>&copy;2017&nbsp;Baidu&nbsp;<a href=http://www.baidu.com/duty/>使用百度前必读</a>&nbsp; <a href=http://jianyi.baidu.com/ class=cp-feedback>意见反馈</a>&nbsp;京ICP证030173号&nbsp; <img src=//www.baidu.com/img/gs.gif> </p> </div> </div> </div> </body> </html>

注:Feign官方文档:

https://cloud.spring.io/spring-cloud-openfeign/reference/html/

来源:https://youbl.blog.csdn.net/article/details/109047987

标签:Feign,请求,响应日志
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