func ipv6fix(clientIP string) string {
	return strings.Split(clientIP, "%")[0]
}

func (rw *headerRewriter) Rewrite(req *http.Request) {
	if clientIP, _, err := net.SplitHostPort(req.RemoteAddr); err == nil {
		clientIP = ipv6fix(clientIP)
		if req.Header.Get(xRealIP) == "" {
			req.Header.Set(xRealIP, clientIP)
		}
	}

	xfProto := req.Header.Get(xForwardedProto)

{
  "fess_log.search_log" : {
    "aliases" : { },
    "mappings" : {
      "search_log" : {
        "properties" : {
          "accessType" : {
            "type" : "keyword"
          },
          "clientIp" : {
            "type" : "keyword"
          },
          "hitCount" : {
            "type" : "long"
          },
          "hitCountRelation" : {
            "type" : "keyword"
          },
          "languages" : {

      },
      "queryPageSize": {
        "type": "integer"
      },
      "userAgent": {
        "type": "keyword"
      },
      "referer": {
        "type": "keyword"
      },
      "clientIp": {
        "type": "keyword"
      },
      "userSessionId": {
        "type": "keyword"
      },
      "accessType": {
        "type": "keyword"
      },
      "userInfoId": {
        "type": "keyword"

        return "SearchLog [searchFieldLogList=" + searchFieldLogList + ", headerList=" + headerList + ", userInfo=" + userInfo + ", fields="
                + fields + ", accessType=" + accessType + ", clientIp=" + clientIp + ", hitCount=" + hitCount + ", languages=" + languages
                + ", queryId=" + queryId + ", queryOffset=" + queryOffset + ", queryPageSize=" + queryPageSize + ", queryTime=" + queryTime

            doColumn("_id");
        }

        public void columnAccessType() {
            doColumn("accessType");
        }

        public void columnClientIp() {
            doColumn("clientIp");
        }

        public void columnHitCount() {
            doColumn("hitCount");
        }

        public void columnHitCountRelation() {
            doColumn("hitCountRelation");
        }