在HandlerInterceptor中获取RequestBody和ResponseBody

Question

我必须实现的逻辑是将所有请求记录到提供给DB的正文.

所以我决定使用:afterCompletion方法HandlerInterceptor.有传递给此方法两个参数HttpServletRequest和HttpServletResponse其他人之间.

问题是:如何获取RequestBody和ResponseBody提供的对象？

据我所知,我们可以使用@RequestBody和@ResponseBody.我可以重复使用HandlerInterceptor吗？

Answer 1

您可以扩展RequestBodyAdviceAdapter和实现该方法afterBodyRead：

@ControllerAdvice
public MyRequestBodyAdviceAdapter extends RequestBodyAdviceAdapter {

    @Override
    public Object afterBodyRead(Object body, HttpInputMessage inputMessage, MethodParameter parameter,
            Type targetType, Class<? extends HttpMessageConverter<?>> converterType) {

        // write body -your input dto- to logs or database or whatever

        return body;
    }

}

RequestBodyAdvice在之前预先设置请求链HandlerInterceptor。正是在http请求输入流转换为您的对象之后。

Answer 2

据我所知，RequestBody并且ResponseBody只能读取一次。因此，您不应阅读Interceptor。这是一些解释。

Answer 3

正如其他人所说，您不能多次读取请求输入流或响应输出流，但是，您可以使用过滤器将原始请求和响应对象替换为包装的对象。通过这种方式，您可以实现包装器并缓冲有效负载，这样您就可以根据需要多次使用它。

这是一个带有工作代码的回购：https : //github.com/glaudiston/spring-boot-rest-payload-logging

做一个mvn clean install就可以了，开心就好。

$ java -jar target/rest-service-0.0.1-SNAPSHOT.jar                                                                                                                                                                                                                               

  .   ____          _            __ _ _
 /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::        (v2.2.2.RELEASE)

2020-01-24 13:06:07.297  INFO 918 --- [           main] c.e.restservice.RestServiceApplication   : Starting RestServiceApplication v0.0.1-SNAPSHOT on ca275nt with PID 918 (/home/ggs/src/spring-boot-rest-payload-logging/target/rest-service-0.0.1-SNAPSHOT.jar started by ggs
in /home/ggs/src/spring-boot-rest-payload-logging)
2020-01-24 13:06:07.301  INFO 918 --- [           main] c.e.restservice.RestServiceApplication   : No active profile set, falling back to default profiles: default                                                                                                             
2020-01-24 13:06:08.331  INFO 918 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat initialized with port(s): 8080 (http)                                                                                                                                 
2020-01-24 13:06:08.348  INFO 918 --- [           main] o.apache.catalina.core.StandardService   : Starting service [Tomcat]
2020-01-24 13:06:08.348  INFO 918 --- [           main] org.apache.catalina.core.StandardEngine  : Starting Servlet engine: [Apache Tomcat/9.0.29]                                                                                                                              
2020-01-24 13:06:08.410  INFO 918 --- [           main] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring embedded WebApplicationContext                                                                                                                           
2020-01-24 13:06:08.410  INFO 918 --- [           main] o.s.web.context.ContextLoader            : Root WebApplicationContext: initialization completed in 1044 ms                                                                                                              
2020-01-24 13:06:08.627  INFO 918 --- [           main] o.s.s.concurrent.ThreadPoolTaskExecutor  : Initializing ExecutorService 'applicationTaskExecutor'                                                                                                                       
2020-01-24 13:06:08.787  INFO 918 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat started on port(s): 8080 (http) with context path ''                                                                                                                  
2020-01-24 13:06:08.791  INFO 918 --- [           main] c.e.restservice.RestServiceApplication   : Started RestServiceApplication in 1.928 seconds (JVM running for 2.319)                                                                                                      
2020-01-24 13:06:11.014  INFO 918 --- [nio-8080-exec-1] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring DispatcherServlet 'dispatcherServlet'                                                                                                                    
2020-01-24 13:06:11.014  INFO 918 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet        : Initializing Servlet 'dispatcherServlet'                                                                                                                                     
2020-01-24 13:06:11.022  INFO 918 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet        : Completed initialization in 8 ms
2020-01-24 13:06:11 [] INFO  RequestFilter:23 - doFilter, parsing request
2020-01-24 13:06:11 [] INFO  LogApiInterceptor:64 - Request Method: POST
2020-01-24 13:06:11 [] INFO  LogApiInterceptor:65 - Request Headers:
2020-01-24 13:06:11 [] INFO  LogApiInterceptor:66 - host:localhost:8080
user-agent:curl/7.64.0
accept:*/*
content-length:32
content-type:application/x-www-form-urlencoded

2020-01-24 13:06:11 [] INFO  LogApiInterceptor:67 - Request body:
2020-01-24 13:06:11 [] INFO  LogApiInterceptor:68 - testdata=123456789&test2=9876543
2020-01-24 13:06:11 [] INFO  LogApiInterceptor:75 - Response Status: 200
2020-01-24 13:06:11 [] INFO  LogApiInterceptor:76 - Response Headers:
2020-01-24 13:06:11 [] INFO  LogApiInterceptor:77 -
2020-01-24 13:06:11 [] INFO  LogApiInterceptor:78 - Response body:
2020-01-24 13:06:11 [] INFO  LogApiInterceptor:84 - {"id":1,"content":"Hello, World!"}
??????????????????????????????????????????????????????????????????????????????????????????????????????????????
$ curl -X POST --data "testdata=123456789&test2=9876543" http://localhost:8080/greeting
{"id":1,"content":"Hello, World!"}