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package grpctool
import (
"fmt"
protoenc "google.golang.org/grpc/encoding/proto"
"google.golang.org/protobuf/proto"
)
type RawFrame struct {
Data []byte
}
// RawCodec is a *raw* encoding.Codec.
// This codec treats a gRPC message frame as raw bytes.
type RawCodec struct {
}
func (c RawCodec) Marshal(v interface{}) ([]byte, error) {
out, ok := v.(*RawFrame)
if !ok {
return nil, fmt.Errorf("RawCodec.Marshal(): unexpected source message type: %T", v)
}
return out.Data, nil
}
func (c RawCodec) Unmarshal(data []byte, v interface{}) error {
dst, ok := v.(*RawFrame)
if !ok {
return fmt.Errorf("RawCodec.Unmarshal(): unexpected target message type: %T", v)
}
dst.Data = data
return nil
}
func (c RawCodec) Name() string {
// Pretend to be a codec for protobuf.
return protoenc.Name
}
// RawCodecWithProtoFallback is a *raw* encoding.Codec.
// This codec treats a gRPC message as raw bytes if it's RawFrame and falls back to default proto encoding
// for other message types.
type RawCodecWithProtoFallback struct {
}
func (c RawCodecWithProtoFallback) Marshal(v interface{}) ([]byte, error) {
out, ok := v.(*RawFrame)
if !ok {
// Only works for v2 messages.
return proto.Marshal(v.(proto.Message))
}
return out.Data, nil
}
func (c RawCodecWithProtoFallback) Unmarshal(data []byte, v interface{}) error {
dst, ok := v.(*RawFrame)
if !ok {
// Only works for v2 messages.
return proto.Unmarshal(data, v.(proto.Message))
}
dst.Data = data
return nil
}
func (c RawCodecWithProtoFallback) Name() string {
// Pretend to be a codec for protobuf.
return protoenc.Name
}
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