// Copyright 2021 EMQ Technologies Co., Ltd. // // Licensed under the Apache License, Version 2.0 (the "License"); // you may not use this file except in compliance with the License. // You may obtain a copy of the License at // // http://www.apache.org/licenses/LICENSE-2.0 // // Unless required by applicable law or agreed to in writing, software // distributed under the License is distributed on an "AS IS" BASIS, // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. // See the License for the specific language governing permissions and // limitations under the License. package message import ( "encoding/json" "fmt" "strings" ) const ( FormatBinary = "binary" FormatJson = "json" DefaultField = "self" MetaKey = "__meta" ) func Decode(payload []byte, format string) (map[string]interface{}, error) { result := make(map[string]interface{}) switch strings.ToLower(format) { case FormatJson: e := json.Unmarshal(payload, &result) return result, e case FormatBinary: result[DefaultField] = payload return result, nil } return nil, fmt.Errorf("invalid format %s", format) }