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decode_stream.go
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/
decode_stream.go
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package protocol
import (
"bufio"
"encoding/binary"
"io"
"github.com/segmentio/encoding/json"
)
// StreamCommandDecoder is EXPERIMENTAL.
type StreamCommandDecoder interface {
Decode() (*Command, []byte, error)
}
// JSONStreamCommandDecoder is EXPERIMENTAL.
type JSONStreamCommandDecoder struct {
reader *bufio.Reader
}
// NewJSONStreamCommandDecoder is EXPERIMENTAL.
func NewJSONStreamCommandDecoder(reader io.Reader) *JSONStreamCommandDecoder {
return &JSONStreamCommandDecoder{reader: bufio.NewReader(reader)}
}
func (d *JSONStreamCommandDecoder) Decode() (*Command, []byte, error) {
cmdBytes, err := d.reader.ReadBytes('\n')
if err != nil {
return nil, nil, err
}
var c Command
_, err = json.Parse(cmdBytes, &c, json.ZeroCopy)
if err != nil {
return nil, nil, err
}
return &c, cmdBytes, nil
}
// ProtobufStreamCommandDecoder is EXPERIMENTAL.
type ProtobufStreamCommandDecoder struct {
reader *bufio.Reader
}
// NewProtobufStreamCommandDecoder is EXPERIMENTAL.
func NewProtobufStreamCommandDecoder(reader io.Reader) *ProtobufStreamCommandDecoder {
return &ProtobufStreamCommandDecoder{reader: bufio.NewReader(reader)}
}
func (d *ProtobufStreamCommandDecoder) Decode() (*Command, []byte, error) {
msgLength, err := binary.ReadUvarint(d.reader)
if err != nil {
return nil, nil, err
}
cmdBytes := make([]byte, msgLength)
n, err := d.reader.Read(cmdBytes)
if err != nil {
return nil, nil, err
}
if uint64(n) != msgLength {
return nil, nil, io.ErrShortBuffer
}
var c Command
err = c.UnmarshalVT(cmdBytes)
if err != nil {
return nil, nil, err
}
return &c, cmdBytes, nil
}
//
//// StreamReplyDecoder ...
//type StreamReplyDecoder interface {
// Decode() (*Reply, error)
//}
//
//type JSONStreamReplyDecoder struct {
// reader *bufio.Reader
//}
//
//func NewJSONStreamReplyDecoder(reader io.Reader) *JSONStreamReplyDecoder {
// return &JSONStreamReplyDecoder{reader: bufio.NewReader(reader)}
//}
//
//func (d *JSONStreamReplyDecoder) Decode() (*Reply, error) {
// cmdBytes, err := d.reader.ReadBytes('\n')
// if err != nil {
// return nil, err
// }
// var c Reply
// _, err = json.Parse(cmdBytes, &c, json.ZeroCopy)
// if err != nil {
// return nil, err
// }
// return &c, nil
//}
//
//type ProtobufStreamReplyDecoder struct {
// reader *bufio.Reader
//}
//
//func NewProtobufStreamReplyDecoder(reader io.Reader) *ProtobufStreamReplyDecoder {
// return &ProtobufStreamReplyDecoder{reader: bufio.NewReader(reader)}
//}
//
//func (d *ProtobufStreamReplyDecoder) Decode() (*Reply, error) {
// msgLength, err := binary.ReadUvarint(d.reader)
// if err != nil {
// return nil, err
// }
// cmdBytes := make([]byte, msgLength)
// n, err := d.reader.Read(cmdBytes)
// if err != nil {
// return nil, err
// }
// if uint64(n) != msgLength {
// return nil, io.ErrShortBuffer
// }
// var c Reply
// err = c.UnmarshalVT(cmdBytes)
// if err != nil {
// return nil, err
// }
// return &c, nil
//}