pkg/util/gogoprotomarshal/protomarshal.go

// Copyright Istio 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 gogoprotomarshal

import (
	"strings"
)

import (
	"github.com/gogo/protobuf/jsonpb"
	"github.com/gogo/protobuf/proto"
	"istio.io/pkg/log"
)

// ApplyJSON unmarshals a JSON string into a proto message. Unknown fields are allowed
func ApplyJSON(js string, pb proto.Message) error {
	reader := strings.NewReader(js)
	m := jsonpb.Unmarshaler{}
	if err := m.Unmarshal(reader, pb); err != nil {
		log.Debugf("Failed to decode proto: %q. Trying decode with AllowUnknownFields=true", err)
		m.AllowUnknownFields = true
		reader.Reset(js)
		return m.Unmarshal(reader, pb)
	}
	return nil
}

// ApplyJSONStrict unmarshals a JSON string into a proto message.
func ApplyJSONStrict(js string, pb proto.Message) error {
	reader := strings.NewReader(js)
	m := jsonpb.Unmarshaler{}
	return m.Unmarshal(reader, pb)
}