61 lines
1.6 KiB
Go
61 lines
1.6 KiB
Go
// Copyright 2018 Envoyproxy Authors
|
|
//
|
|
// 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 util contains shared utility functions.
|
|
package util
|
|
|
|
import (
|
|
"bytes"
|
|
"errors"
|
|
|
|
"github.com/gogo/protobuf/jsonpb"
|
|
"github.com/gogo/protobuf/proto"
|
|
"github.com/gogo/protobuf/types"
|
|
)
|
|
|
|
// MessageToStruct encodes a protobuf Message into a Struct. Hilariously, it
|
|
// uses JSON as the intermediary
|
|
// author:glen@turbinelabs.io
|
|
func MessageToStruct(msg proto.Message) (*types.Struct, error) {
|
|
if msg == nil {
|
|
return nil, errors.New("nil message")
|
|
}
|
|
|
|
buf := &bytes.Buffer{}
|
|
if err := (&jsonpb.Marshaler{OrigName: true}).Marshal(buf, msg); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
pbs := &types.Struct{}
|
|
if err := jsonpb.Unmarshal(buf, pbs); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return pbs, nil
|
|
}
|
|
|
|
// StructToMessage decodes a protobuf Message from a Struct.
|
|
func StructToMessage(pbst *types.Struct, out proto.Message) error {
|
|
if pbst == nil {
|
|
return errors.New("nil struct")
|
|
}
|
|
|
|
buf := &bytes.Buffer{}
|
|
if err := (&jsonpb.Marshaler{OrigName: true}).Marshal(buf, pbst); err != nil {
|
|
return err
|
|
}
|
|
|
|
return jsonpb.Unmarshal(buf, out)
|
|
}
|