u can extend ContentCachingRequestWrapper to return a new reader each time

`
import jakarta.servlet.http.HttpServletRequest;
import org.springframework.web.util.ContentCachingRequestWrapper;

import java.io.BufferedReader;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStreamReader;

public class ReReadableContentCachingRequestWrapper extends ContentCachingRequestWrapper {

  public ReReadableContentCachingRequestWrapper(HttpServletRequest request) {
    super(request);
  }

  public ReReadableContentCachingRequestWrapper(HttpServletRequest request, int contentCacheLimit) {
    super(request, contentCacheLimit);
  }

  @Override
  public BufferedReader getReader() throws IOException {
    return new BufferedReader(new InputStreamReader(new ByteArrayInputStream(getContentAsByteArray())));
  }

}
`