一文带你了解如何使用spring拦截器获取请求体和响应体的内容

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一文带你了解如何使用spring拦截器获取请求体和响应体的内容

springboot 日志记录接口的请求参数和响应结果的两种方式-拦截器和切面(具体代码)
前言:在生产中如果出现问题,我们想要查看日志,某个时间段用户调用接口的请求参数和响应的返回结果,通过日志来推测下用户当时做了什么操作。日志记录接口的请求参数和响应结果有利于我们排查生产的问题,但是也会给系统带来内存性能的问题。所以我们需要权衡其中的利弊来选择,下面就是记录日志两种方式的具体代码。
 

一、使用拦截器

本来以为这种方式只要自定义拦截器继承HandlerInterceptorAdapter类重写preHandle() 和 afterCompletion()就可以了。没想到还是遇到挺多坑。

请求参数:request.getParameterMap()可以获取到请求参数,但是如果接口是使用@RequestBody,就会发现得不到值。

响应结果:这是比较蛋疼一点,我几乎查了response的所有方法,都发现没法得到接口响应结果。

实现ResponseBodyAdvice类获取响应体的内容,需要在项目中引入jackson

maven坐标:

        
            com.fasterxml.jackson.core
            jackson-databind
            2.12.3
        

代码如下,result就是对应接口响应的结果转换成了json格式存放在了result字符串中,然后将result存放在了httpSession中,用于拦截器处进行获取:

@ControllerAdvice
public class InterceptResponse implements ResponseBodyAdvice {

    private static final Integer MAX_LENGTH = 1000;

    @Override
    public boolean supports(MethodParameter methodParameter, Class> aClass) {
        return true;
    }

    @Override
    public Object beforeBodyWrite(Object body, MethodParameter methodParameter, MediaType mediaType, Class> aClass, ServerHttpRequest serverHttpRequest, ServerHttpResponse serverHttpResponse) {
       
            String result;
            ObjectMapper objectMapper = new ObjectMapper();
            try {
                result = objectMapper.writeValueAsString(body);
            } catch (JsonProcessingException e) {
                throw new RuntimeException("JSON转换失败", e);
            }
            Integer length = result.length();
            result = result.substring(0, length);
        HttpServletRequest httpServletRequest = ((ServletRequestAttributes) 
        RequestContextHolder.getRequestAttributes()).getRequest();
        HttpSession httpSession = httpServletRequest.getSession(true);
        //放到缓存里,以便于可以在HandlerInterceptor拦截里取出并打印出返回结果
        httpSession.setAttribute("body", result)
 
        return body;
    }
}
 
  

定义拦截器继承HandlerInterceptorAdapter

@Component
@Slf4j
public class LogMonitorInterceptor extends HandlerInterceptorAdapter {

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        String requestParams = StringUtils.EMPTY;
        if (request instanceof RequestWrapper) {
            requestParams = ((RequestWrapper) request).getBody();
        }
        if(StrUtil.isEmpty(requestParams)){
            requestParams = JSON.toJSONString(request.getParameterMap());
        }
        log.info("request:  uri:{} , type:{} , ip:{}, operatorId:{}, operatorName:{}, params:{}",
                request.getRequestURI(),request.getMethod(),request.getRemoteAddr(),
                WebUtils.getId(),WebUtils.getUsername(), requestParams );
        return true;
    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        HttpSession httpSession = request.getSession();
        String result = (String) httpSession.getAttribute("body");

        log.info("response:  url:{} , type:{} , ip:{}, operatorId:{}, operatorName:{}, result:{}",
                request.getRequestURI(),request.getMethod(),request.getRemoteAddr(),
                WebUtils.getId(),WebUtils.getUsername(), result );
    }
}

将拦截器注册在spring中:

@Configuration
public class WebMvcConfig implements WebMvcConfigurer {
    @Autowired
    private LogMonitorInterceptor logMonitorInterceptor;

    @Override
    public void addInterceptors(InterceptorRegistry registry) {

        // 接口操作日志拦截器
        registry.addInterceptor(logMonitorInterceptor);
    }
}

 

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