93 lines
1.7 KiB
Go
93 lines
1.7 KiB
Go
// Package proto provides a proto codec
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package proto // import "go.unistack.org/micro-codec-segmentio/v3/proto"
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import (
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"github.com/segmentio/encoding/proto"
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pb "go.unistack.org/micro-proto/v3/codec"
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"go.unistack.org/micro/v3/codec"
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rutil "go.unistack.org/micro/v3/util/reflect"
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newproto "google.golang.org/protobuf/proto"
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)
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type protoCodec struct {
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opts codec.Options
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}
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var _ codec.Codec = &protoCodec{}
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func (c *protoCodec) Marshal(v interface{}, opts ...codec.Option) ([]byte, error) {
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if v == nil {
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return nil, nil
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}
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options := c.opts
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for _, o := range opts {
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o(&options)
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}
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if options.Flatten {
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if nv, nerr := rutil.StructFieldByTag(v, options.TagName, "flatten"); nerr == nil {
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v = nv
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}
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}
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switch m := v.(type) {
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case *codec.Frame:
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return m.Data, nil
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case *pb.Frame:
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return m.Data, nil
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}
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switch m := v.(type) {
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case proto.Message:
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return proto.Marshal(m)
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case newproto.Message:
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return proto.Marshal(m)
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default:
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return nil, codec.ErrInvalidMessage
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}
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}
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func (c *protoCodec) Unmarshal(d []byte, v interface{}, opts ...codec.Option) error {
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if v == nil || len(d) == 0 {
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return nil
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}
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options := c.opts
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for _, o := range opts {
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o(&options)
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}
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if options.Flatten {
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if nv, nerr := rutil.StructFieldByTag(v, options.TagName, "flatten"); nerr == nil {
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v = nv
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}
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}
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switch m := v.(type) {
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case *codec.Frame:
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m.Data = d
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return nil
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case *pb.Frame:
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m.Data = d
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return nil
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}
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switch m := v.(type) {
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case proto.Message:
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return proto.Unmarshal(d, m)
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case newproto.Message:
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return proto.Unmarshal(d, m)
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default:
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return codec.ErrInvalidMessage
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}
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}
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func (c *protoCodec) String() string {
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return "proto"
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}
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func NewCodec(opts ...codec.Option) *protoCodec {
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return &protoCodec{opts: codec.NewOptions(opts...)}
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}
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