1Panel/backend/utils/terminal/ws_local_session.go

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package terminal
import (
"encoding/base64"
"encoding/json"
"sync"
"github.com/1Panel-dev/1Panel/backend/global"
"github.com/gorilla/websocket"
"github.com/pkg/errors"
)
type LocalWsSession struct {
slave *LocalCommand
wsConn *websocket.Conn
writeMutex sync.Mutex
}
func NewLocalWsSession(cols, rows int, wsConn *websocket.Conn, slave *LocalCommand) (*LocalWsSession, error) {
if err := slave.ResizeTerminal(cols, rows); err != nil {
global.LOG.Errorf("ssh pty change windows size failed, err: %v", err)
}
return &LocalWsSession{
slave: slave,
wsConn: wsConn,
}, nil
}
func (sws *LocalWsSession) Start(quitChan chan bool) {
go sws.handleSlaveEvent(quitChan)
go sws.receiveWsMsg(quitChan)
}
func (sws *LocalWsSession) handleSlaveEvent(exitCh chan bool) {
defer setQuit(exitCh)
defer global.LOG.Debug("thread of handle slave event has exited now")
buffer := make([]byte, 1024)
for {
select {
case <-exitCh:
return
default:
n, _ := sws.slave.Read(buffer)
_ = sws.masterWrite(buffer[:n])
}
}
}
func (sws *LocalWsSession) masterWrite(data []byte) error {
sws.writeMutex.Lock()
defer sws.writeMutex.Unlock()
err := sws.wsConn.WriteMessage(websocket.TextMessage, data)
if err != nil {
return errors.Wrapf(err, "failed to write to master")
}
return nil
}
func (sws *LocalWsSession) receiveWsMsg(exitCh chan bool) {
wsConn := sws.wsConn
defer setQuit(exitCh)
defer global.LOG.Debug("thread of receive ws msg has exited now")
for {
select {
case <-exitCh:
return
default:
_, wsData, err := wsConn.ReadMessage()
if err != nil {
global.LOG.Errorf("reading webSocket message failed, err: %v", err)
return
}
msgObj := wsMsg{}
_ = json.Unmarshal(wsData, &msgObj)
switch msgObj.Type {
case wsMsgResize:
if msgObj.Cols > 0 && msgObj.Rows > 0 {
if err := sws.slave.ResizeTerminal(msgObj.Cols, msgObj.Rows); err != nil {
global.LOG.Errorf("ssh pty change windows size failed, err: %v", err)
}
}
case wsMsgCmd:
decodeBytes, err := base64.StdEncoding.DecodeString(msgObj.Data)
if err != nil {
global.LOG.Errorf("websock cmd string base64 decoding failed, err: %v", err)
}
sws.sendWebsocketInputCommandToSshSessionStdinPipe(decodeBytes)
}
}
}
}
func (sws *LocalWsSession) sendWebsocketInputCommandToSshSessionStdinPipe(cmdBytes []byte) {
if _, err := sws.slave.Write(cmdBytes); err != nil {
global.LOG.Errorf("ws cmd bytes write to ssh.stdin pipe failed, err: %v", err)
}
}