delete db info after used

Author: HaoyangYuan2000

endpoints/openrtb2/auction.go

@@ -463,6 +463,23 @@ func (deps *endpointDeps) parseRequest(httpRequest *http.Request, labels *metric
 		return
 	}
 
+	var reqJson map[string]interface{}
+	if err := json.Unmarshal(requestJson, &reqJson); err != nil {
+		return nil, nil, nil, nil, nil, nil, []error{err}
+	}
+	if ext, ok := reqJson["ext"].(map[string]interface{}); ok {
+		delete(ext, "db_accounts")
+		delete(ext, "db_fetched")
+		delete(ext, "db_storedimps")
+		delete(ext, "db_storedrequests")
+		reqJson["ext"] = ext
+	}
+	if newRequestJson, err := json.Marshal(reqJson); err != nil {
+		return nil, nil, nil, nil, nil, nil, []error{err}
+	} else {
+		requestJson = newRequestJson
+	}
+
 	accountId, isAppReq, errs := getAccountIdFromRawRequest(hasStoredBidRequest, storedRequests[storedBidRequestId], requestJson)
 	// fill labels here in order to pass correct metrics in case of errors
 	if isAppReq {