HandlerInterceptor preHandle 에는 어떤 객체가 파라미터로 넘어오는가?

Default

debug:
org.apache.catalina.connector.RequestFacade

request = {RequestFacade@13088} 
 request = {Request@13094} 
  coyoteRequest = {Request@13095} "R( /interactivity)"
  cookies = null
  formats = {SimpleDateFormat[3]@13096} 
  attributes = {ConcurrentHashMap@13097}  size = 14
  sslAttributesParsed = false
  locales = {ArrayList@13098}  size = 0
  notes = {HashMap@13099}  size = 0
  authType = null
  internalDispatcherType = {DispatcherType@13100} "REQUEST"
  inputBuffer = {InputBuffer@13101} 
  inputStream = {CoyoteInputStream@13102} 
  reader = {CoyoteReader@13103} 
  usingInputStream = false
  usingReader = false
  userPrincipal = null
  parametersParsed = true
  cookiesParsed = true
  cookiesConverted = false
  secure = false
  subject = null
  postData = null
  parameterMap = {ParameterMap@13104}  size = 0
  parts = null
  partsParseException = null
  session = null
  requestDispatcherPath = {MessageBytes@13105} "/interactivity"
  requestedSessionCookie = false
  requestedSessionId = null
  requestedSessionURL = false
  requestedSessionSSL = false
  localesParsed = false
  localPort = -1
  remoteAddr = null
  remoteHost = null
  remotePort = -1
  localAddr = null
  localName = null
  asyncContext = null
  asyncSupported = {Boolean@13106} true
  applicationRequest = {RequestFacade@13088} 
  connector = {Connector@13107} "Connector[HTTP/1.1-8080]"
  filterChain = {ApplicationFilterChain@13108} 
  mappingData = {MappingData@13109} 
  applicationMapping = {ApplicationMapping@13110} 
  facade = {RequestFacade@13088} 
  response = {Response@13111} 
  URIConverter = {B2CConverter@13112}

Request body logging 하기 위하여 CommonsRequestLoggingFilter 를 추가한 경우

filter추가:

filter log는

2022–01–11 22:11:07.798 DEBUG 36450 — — [nio-8080-exec-1] o.s.w.f.CommonsRequestLoggingFilter : Before request [POST /interactivity]

interceptor 에 넘어오는 객체는

request = {ContentCachingRequestWrapper@13078} 
 cachedContent = {ByteArrayOutputStream@14974} ""
 contentCacheLimit = {Integer@14975} 10000
 inputStream = null
 reader = null
 request = {RequestFacade@14921}
org.springframework.web.filter.CommonsRequestLoggingFilter
org.springframework.web.filter.AbstractRequestLoggingFilter
org.springframework.web.util.ContentCachingRequestWrapper

Limitation

• ContentCachingRequestWrapper class only supports the following:

Content-Type:application/x-www-form-urlencoded
Method-Type:POST

application/x-www-form-urlencoded 만 지원하는가? 그렇지는 않는거 같은데 무슨 의미지? request.getParameterMap(); 메서드등을 지원하지 않는다는걸까?

inputStream 객체는 org.springframework.web.util.ContentCachingRequestWrapper.ContentCachingInputStream#ContentCachingInputStream 객체이다.

getInputStream에서 여러번 읽을 수 있을 줄 알았는데 그렇지는 않네.

뭐가 잘 못 된거지? inputStream 호출 후에 org.springframework.web.util.ContentCachingRequestWrapper#getContentAsByteArray 로 가져다 사용할 경우 아니면 prehandle 단계에서는 안되는건가? 뭐여 어따 쓰라는거여.

걍 CommonsRequestLoggingFilter 랑 같이 사용되는 클래스인가 보다. interceptor도 필요없는거 같은디.

protected String getMessagePayload(HttpServletRequest request) {
   ContentCachingRequestWrapper wrapper =
         WebUtils.getNativeRequest(request, ContentCachingRequestWrapper.class);
   if (wrapper != null) {
      byte[] buf = wrapper.getContentAsByteArray();
      if (buf.length > 0) {
         int length = Math.min(buf.length, getMaxPayloadLength());
         try {
            return new String(buf, 0, length, wrapper.getCharacterEncoding());
         }
         catch (UnsupportedEncodingException ex) {
            return "[unknown]";
         }
      }
   }
   return null;
}

org.springframework.web.filter.CommonsRequestLoggingFilter#beforeRequest 에서 request payload 가 안 남는거는 아직 inputStream이 호출이 안되서 org.springframework.web.util.ContentCachingRequestWrapper#cachedContent 에 cache 가 안되었기 때문이다.

@Override
protected void beforeRequest(HttpServletRequest request, String message) {
   logger.debug(message);
}

Q. HandlerInterceptorAdapter, HandlerInterceptor 차이는 무엇인가?

Related Information

https://www.baeldung.com/spring-http-logging

https://www.baeldung.com/spring-mvc-handlerinterceptor