refactor: 커스텀 잭슨 컨버터 필터로 대체

ContentCachingRequestWrapper로 내부의 스트림 캐싱하도록 변경

Author: Dae-Hwa

src/main/java/com/imd/yourvoice/common/CachingBodyPerRequestFilter.java

@@ -0,0 +1,25 @@
+package com.imd.yourvoice.common;
+
+import org.springframework.context.annotation.Configuration;
+import org.springframework.web.filter.OncePerRequestFilter;
+import org.springframework.web.util.ContentCachingRequestWrapper;
+import org.springframework.web.util.ContentCachingResponseWrapper;
+
+import javax.servlet.FilterChain;
+import javax.servlet.ServletException;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import java.io.IOException;
+
+@Configuration
+public class CachingBodyPerRequestFilter extends OncePerRequestFilter {
+
+    @Override
+    protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain filterChain) throws ServletException, IOException {
+        ContentCachingRequestWrapper cachingRequestWrapper = new ContentCachingRequestWrapper(request);
+        ContentCachingResponseWrapper cachingResponseWrapper = new ContentCachingResponseWrapper(response);
+
+        filterChain.doFilter(cachingRequestWrapper, cachingResponseWrapper);
+        cachingResponseWrapper.copyBodyToResponse();
+    }
+}

src/main/java/com/imd/yourvoice/common/CommonExceptionHandler.java

@@ -1,21 +1,24 @@
 package com.imd.yourvoice.common;
 
+import com.fasterxml.jackson.databind.ObjectMapper;
+import lombok.SneakyThrows;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.converter.HttpMessageNotReadableException;
 import org.springframework.web.bind.MethodArgumentNotValidException;
 import org.springframework.web.bind.annotation.ExceptionHandler;
 import org.springframework.web.bind.annotation.ResponseStatus;
 import org.springframework.web.bind.annotation.RestControllerAdvice;
+import org.springframework.web.util.ContentCachingRequestWrapper;
 
-import javax.servlet.http.HttpServletRequest;
+import java.util.HashMap;
 import java.util.Map;
 
 @RestControllerAdvice
 public class CommonExceptionHandler {
 
     @ResponseStatus(HttpStatus.BAD_REQUEST)
     @ExceptionHandler(MethodArgumentNotValidException.class)
-    public ResponseDTO<Map<String, Object>> methodArgumentNotValidExceptionHandler(HttpServletRequest request) {
+    public ResponseDTO<Map<String, Object>> methodArgumentNotValidExceptionHandler(ContentCachingRequestWrapper request) {
         return ResponseDTO.<Map<String, Object>>builder()
                 .data(getRequestBodyAt(request))
                 .message("Validation Error")
@@ -25,15 +28,16 @@ public ResponseDTO<Map<String, Object>> methodArgumentNotValidExceptionHandler(H
 
     @ResponseStatus(HttpStatus.BAD_REQUEST)
     @ExceptionHandler(HttpMessageNotReadableException.class)
-    public ResponseDTO<Map<String, Object>> httpMessageNotReadableExceptionHandler(HttpServletRequest request) {
+    public ResponseDTO<Map<String, Object>> httpMessageNotReadableExceptionHandler(ContentCachingRequestWrapper request) {
         return ResponseDTO.<Map<String, Object>>builder()
                 .data(getRequestBodyAt(request))
                 .message("UnknownRequestProperties Error")
                 .isSuccess("fail")
                 .build();
     }
 
-    private Map<String, Object> getRequestBodyAt(HttpServletRequest request) {
-        return (Map<String, Object>) request.getAttribute("requestBody");
+    @SneakyThrows
+    private Map<String, Object> getRequestBodyAt(ContentCachingRequestWrapper request) {
+        return new ObjectMapper().readValue(request.getContentAsByteArray(), HashMap.class);
     }
 }