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Example cleanup function for protobuf message
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| func clearProtoFields(msg proto.Message, sensitiveFieldAnnotation *protoimpl.ExtensionInfo) proto.Message { | |
| clonedMsg := proto.Clone(msg) | |
| reflectMsg := proto.MessageReflect(clonedMsg) | |
| var messagesToCheck []protoreflect.Message | |
| messagesToCheck = append(messagesToCheck, reflectMsg) | |
| for len(messagesToCheck) != 0 { | |
| lastIdx := len(messagesToCheck) - 1 | |
| visitMessage := messagesToCheck[lastIdx] | |
| messagesToCheck = messagesToCheck[:lastIdx] | |
| visitMessage.Range(func(fd protoreflect.FieldDescriptor, val protoreflect.Value) bool { | |
| if opts := fd.Options().(*descriptorpb.FieldOptions); opts != nil { | |
| if proto.HasExtension(opts, sensitiveFieldAnnotation) { | |
| visitMessage.Clear(fd) | |
| } | |
| return true | |
| } | |
| switch { | |
| case fd.Kind() != protoreflect.MessageKind: | |
| return true | |
| case fd.IsList(): | |
| listVal := val.List() | |
| for i := 0; i < listVal.Len(); i++ { | |
| elem := listVal.Get(i) | |
| messagesToCheck = append(messagesToCheck, elem.Message()) | |
| } | |
| case fd.IsMap(): | |
| mapVal := val.Map() | |
| mapVal.Range(func(k protoreflect.MapKey, v protoreflect.Value) bool { | |
| messagesToCheck = append(messagesToCheck, v.Message()) | |
| return true | |
| }) | |
| default: | |
| messagesToCheck = append(messagesToCheck, val.Message()) | |
| } | |
| return true | |
| }) | |
| } | |
| return clonedMsg | |
| } |
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