istio.io/istio@v0.0.0-20240520182934-d79c90f27776/pkg/util/gogoprotomarshal/protomarshal.go (about)

     1  // Copyright Istio Authors
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package gogoprotomarshal
    16  
    17  import (
    18  	"strings"
    19  
    20  	"github.com/gogo/protobuf/jsonpb" // nolint: depguard
    21  	"github.com/gogo/protobuf/proto"  // nolint: depguard
    22  
    23  	"istio.io/istio/pkg/log"
    24  )
    25  
    26  // ApplyJSON unmarshals a JSON string into a proto message. Unknown fields are allowed
    27  func ApplyJSON(js string, pb proto.Message) error {
    28  	reader := strings.NewReader(js)
    29  	m := jsonpb.Unmarshaler{}
    30  	if err := m.Unmarshal(reader, pb); err != nil {
    31  		log.Debugf("Failed to decode proto: %q. Trying decode with AllowUnknownFields=true", err)
    32  		m.AllowUnknownFields = true
    33  		reader.Reset(js)
    34  		return m.Unmarshal(reader, pb)
    35  	}
    36  	return nil
    37  }
    38  
    39  // ApplyJSONStrict unmarshals a JSON string into a proto message.
    40  func ApplyJSONStrict(js string, pb proto.Message) error {
    41  	reader := strings.NewReader(js)
    42  	m := jsonpb.Unmarshaler{}
    43  	return m.Unmarshal(reader, pb)
    44  }