61 lines
1.6 KiB
Go
61 lines
1.6 KiB
Go
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// Copyright 2018 Envoyproxy Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// Package util contains shared utility functions.
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package util
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import (
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"bytes"
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"errors"
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"github.com/gogo/protobuf/jsonpb"
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"github.com/gogo/protobuf/proto"
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"github.com/gogo/protobuf/types"
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)
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// MessageToStruct encodes a protobuf Message into a Struct. Hilariously, it
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// uses JSON as the intermediary
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// author:glen@turbinelabs.io
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func MessageToStruct(msg proto.Message) (*types.Struct, error) {
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if msg == nil {
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return nil, errors.New("nil message")
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}
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buf := &bytes.Buffer{}
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if err := (&jsonpb.Marshaler{OrigName: true}).Marshal(buf, msg); err != nil {
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return nil, err
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}
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pbs := &types.Struct{}
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if err := jsonpb.Unmarshal(buf, pbs); err != nil {
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return nil, err
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}
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return pbs, nil
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}
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// StructToMessage decodes a protobuf Message from a Struct.
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func StructToMessage(pbst *types.Struct, out proto.Message) error {
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if pbst == nil {
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return errors.New("nil struct")
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}
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buf := &bytes.Buffer{}
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if err := (&jsonpb.Marshaler{OrigName: true}).Marshal(buf, pbst); err != nil {
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return err
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}
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return jsonpb.Unmarshal(buf, out)
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}
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