gistfile1.scala

class RequestWrapper(request: HttpServletRequest) extends javax.servlet.http.HttpServletRequestWrapper(request) {
  override def getHeaders(name: String): java.util.Enumeration[_] = {
    if (!ForwardRequest.hopByHopHeaders.contains(name))
      super.getHeaders(name)
    else
      java.util.Collections.enumeration(new ArrayList)
  }
}