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52 lines
1.2 KiB
52 lines
1.2 KiB
// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package packet
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import (
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"bytes"
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"encoding/json"
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"fmt"
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"io"
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"github.com/pkg/errors"
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)
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func Unmarshal(data []byte, p *Packet) error {
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return NewDecoder(bytes.NewBuffer(data)).Decode(p)
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}
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type Decoder struct {
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r io.Reader
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j *json.Decoder
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}
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func NewDecoder(r io.Reader) *Decoder {
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return &Decoder{
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r: r,
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j: json.NewDecoder(r),
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}
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}
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func (d *Decoder) Decode(p *Packet) error {
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if p == nil {
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return fmt.Errorf("no packet")
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}
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if err := d.j.Decode(p); err != nil {
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return errors.Wrap(err, "failed to decode body")
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}
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if p.Id == uint64(0) || p.Type == "" || p.Body == nil {
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return fmt.Errorf("packet incomplete, missing id, type or body")
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}
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return nil
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}
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