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suback.go
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suback.go
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// Copyright 2014, Shuhei Tanuma. All rights reserved.
// Use of this source code is governed by a MIT license
// that can be found in the LICENSE file.
package mqtt
import (
"bytes"
"encoding/binary"
"encoding/json"
"io"
)
type SubackMessage struct {
FixedHeader
PacketIdentifier uint16
Qos []byte
}
func (self *SubackMessage) WriteTo(w io.Writer) (int64, error) {
var fsize = 2 + len(self.Qos)
size, err := self.FixedHeader.writeTo(fsize, w)
if err != nil {
return 0, err
}
binary.Write(w, binary.BigEndian, self.PacketIdentifier)
io.Copy(w, bytes.NewReader(self.Qos))
return int64(size) + int64(fsize), nil
}
func (self *SubackMessage) decode(reader io.Reader) error {
var remaining uint8
remaining = uint8(self.FixedHeader.RemainingLength)
binary.Read(reader, binary.BigEndian, &self.PacketIdentifier)
remaining -= 2
buffer := bytes.NewBuffer(nil)
for i := 0; i <= int(remaining); i++ {
var value uint8 = 0
binary.Read(reader, binary.BigEndian, &value)
binary.Write(buffer, binary.BigEndian, value)
remaining -= 1
}
self.Qos = buffer.Bytes()
return nil
}
func (self *SubackMessage) String() string {
b, _ := json.Marshal(self)
return string(b)
}