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json.go
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json.go
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// Copyright 2024 Google LLC
//
// 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 httpmux
import (
"strings"
"google.golang.org/protobuf/encoding/protojson"
"google.golang.org/protobuf/proto"
"google.golang.org/protobuf/reflect/protoreflect"
"google.golang.org/protobuf/reflect/protoregistry"
"k8s.io/klog/v2"
)
func MarshalAsJSON(obj proto.Message) ([]byte, error) {
return protojson.MarshalOptions{Resolver: &protoResolver{}}.Marshal(obj)
}
type protoResolver struct {
}
var _ protoregistry.ExtensionTypeResolver = &protoResolver{}
func (r *protoResolver) FindExtensionByName(message protoreflect.FullName) (protoreflect.ExtensionType, error) {
return protoregistry.GlobalTypes.FindExtensionByName(r.remapName(message))
}
func (r *protoResolver) FindExtensionByNumber(message protoreflect.FullName, field protoreflect.FieldNumber) (protoreflect.ExtensionType, error) {
return protoregistry.GlobalTypes.FindExtensionByNumber(r.remapName(message), field)
}
var _ protoregistry.MessageTypeResolver = &protoResolver{}
func (r *protoResolver) FindMessageByName(message protoreflect.FullName) (protoreflect.MessageType, error) {
return protoregistry.GlobalTypes.FindMessageByName(r.remapName(message))
}
func (r *protoResolver) FindMessageByURL(url string) (protoreflect.MessageType, error) {
if strings.HasPrefix(url, "type.googleapis.com/google.") {
s := "type.googleapis.com/mockgcp." + strings.TrimPrefix(url, "type.googleapis.com/google.")
mt, err := protoregistry.GlobalTypes.FindMessageByURL(s)
if err != nil {
klog.Warningf("FindMessageByURL(%q) failed: %v", s, err)
} else {
return mt, nil
}
}
return protoregistry.GlobalTypes.FindMessageByURL(url)
}
func (r *protoResolver) remapName(name protoreflect.FullName) protoreflect.FullName {
// Remap names with a prefix of "google."" to be "mockgcp.", so we can find them.
s := string(name)
if strings.HasPrefix(s, "google.") {
s = "mockgcp." + strings.TrimPrefix(s, "google.")
return protoreflect.FullName(s)
}
return name
}