mirror of
https://github.com/vee1e/kubeedge.git
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100 lines
2.5 KiB
Go
100 lines
2.5 KiB
Go
/*
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Copyright 2020 The KubeEdge Authors.
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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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http://www.apache.org/licenses/LICENSE-2.0
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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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*/
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package stream
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import (
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"bufio"
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"encoding/binary"
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"fmt"
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"io"
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"k8s.io/klog/v2"
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"github.com/kubeedge/kubeedge/common/constants"
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)
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type MessageType uint64
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func (m MessageType) String() string {
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switch m {
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case MessageTypeLogsConnect:
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return "LOGS_CONNECT"
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case MessageTypeExecConnect:
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return "EXEC_CONNECT"
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case MessageTypeAttachConnect:
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return "ATTACH_CONNECT"
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case MessageTypeMetricConnect:
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return "METRIC_CONNECT"
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case MessageTypeData:
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return "DATA"
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case MessageTypeRemoveConnect:
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return "REMOVE_CONNECT"
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case MessageTypeCloseConnect:
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return "CLOSE_CONNECT"
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}
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return "UNKNOWN"
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}
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type Message struct {
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// ConnectID indicate the apiserver connection id
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ConnectID uint64
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MessageType MessageType
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Data []byte
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}
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func NewMessage(id uint64, messType MessageType, data []byte) *Message {
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return &Message{
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ConnectID: id,
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MessageType: messType,
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Data: data,
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}
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}
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func (m *Message) Bytes() []byte {
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// connectID + MessageType + Data
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buf, offset := make([]byte, 16), 0
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offset += binary.PutUvarint(buf[offset:], m.ConnectID)
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offset += binary.PutUvarint(buf[offset:], uint64(m.MessageType))
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return append(buf[0:offset], m.Data...)
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}
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func (m *Message) String() string {
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return fmt.Sprintf("MESSAGE: connectID %v messageType %s", m.ConnectID, m.MessageType)
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}
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func ReadMessageFromTunnel(r io.Reader) (*Message, error) {
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buf := bufio.NewReader(r)
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connectID, err := binary.ReadUvarint(buf)
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if err != nil {
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return nil, err
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}
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messageType, err := binary.ReadUvarint(buf)
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if err != nil {
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return nil, err
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}
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data, err := io.ReadAll(io.LimitReader(buf, constants.MaxRespBodyLength))
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if err != nil {
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return nil, err
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}
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klog.V(6).Infof("Receive Tunnel message connectID %d messageType %s data:%v string:[%v]",
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connectID, MessageType(messageType), data, string(data))
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return &Message{
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ConnectID: connectID,
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MessageType: MessageType(messageType),
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Data: data,
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}, nil
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}
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