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package apiv1
import (
"net/http"
"strconv"
"strings"
"time"
"github.com/gin-gonic/gin"
"github.com/iotbzh/xds-server/lib/common"
)
// ExecArgs JSON parameters of /exec command
type ExecArgs struct {
ID string `json:"id"`
RPath string `json:"rpath"` // relative path into project
Cmd string `json:"cmd" binding:"required"`
Args []string `json:"args"`
CmdTimeout int `json:"timeout"` // command completion timeout in Second
}
// ExecOutMsg Message send on each output (stdout+stderr) of executed command
type ExecOutMsg struct {
CmdID string `json:"cmdID"`
Timestamp string `json:"timestamp"`
Stdout string `json:"stdout"`
Stderr string `json:"stderr"`
}
// ExecExitMsg Message send when executed command exited
type ExecExitMsg struct {
CmdID string `json:"cmdID"`
Timestamp string `json:"timestamp"`
Code int `json:"code"`
Error error `json:"error"`
}
// ExecOutEvent Event send in WS when characters are received
const ExecOutEvent = "exec:output"
// ExecExitEvent Event send in WS when program exited
const ExecExitEvent = "exec:exit"
var execCommandID = 1
// ExecCmd executes remotely a command
func (s *APIService) execCmd(c *gin.Context) {
var args ExecArgs
if c.BindJSON(&args) != nil {
common.APIError(c, "Invalid arguments")
return
}
// TODO: add permission
// Retrieve session info
sess := s.sessions.Get(c)
if sess == nil {
common.APIError(c, "Unknown sessions")
return
}
sop := sess.IOSocket
if sop == nil {
common.APIError(c, "Websocket not established")
return
}
// Allow to pass id in url (/exec/:id) or as JSON argument
id := c.Param("id")
if id == "" {
id = args.ID
}
if id == "" {
common.APIError(c, "Invalid id")
return
}
prj := s.cfg.GetFolderFromID(id)
if prj == nil {
common.APIError(c, "Unknown id")
return
}
execTmo := args.CmdTimeout
if execTmo == 0 {
// TODO get default timeout from config.json file
execTmo = 24 * 60 * 60 // 1 day
}
// Define callback for output
var oCB common.EmitOutputCB
oCB = func(sid string, id int, stdout, stderr string) {
// IO socket can be nil when disconnected
so := s.sessions.IOSocketGet(sid)
if so == nil {
s.log.Infof("%s not emitted: WS closed - sid: %s - msg id:%d", ExecOutEvent, sid, id)
return
}
s.log.Debugf("%s emitted - WS sid %s - id:%d", ExecOutEvent, sid, id)
// FIXME replace by .BroadcastTo a room
err := (*so).Emit(ExecOutEvent, ExecOutMsg{
CmdID: strconv.Itoa(id),
Timestamp: time.Now().String(),
Stdout: stdout,
Stderr: stderr,
})
if err != nil {
s.log.Errorf("WS Emit : %v", err)
}
}
// Define callback for output
eCB := func(sid string, id int, code int, err error) {
s.log.Debugf("Command [Cmd ID %d] exited: code %d, error: %v", id, code, err)
// IO socket can be nil when disconnected
so := s.sessions.IOSocketGet(sid)
if so == nil {
s.log.Infof("%s not emitted - WS closed (id:%d", ExecExitEvent, id)
return
}
// FIXME replace by .BroadcastTo a room
e := (*so).Emit(ExecExitEvent, ExecExitMsg{
CmdID: strconv.Itoa(id),
Timestamp: time.Now().String(),
Code: code,
Error: err,
})
if e != nil {
s.log.Errorf("WS Emit : %v", e)
}
}
cmdID := execCommandID
execCommandID++
cmd := "cd " + prj.GetFullPath(args.RPath) + " && " + args.Cmd
if len(args.Args) > 0 {
cmd += " " + strings.Join(args.Args, " ")
}
s.log.Debugf("Execute [Cmd ID %d]: %v %v", cmdID, cmd)
err := common.ExecPipeWs(cmd, sop, sess.ID, cmdID, execTmo, s.log, oCB, eCB)
if err != nil {
common.APIError(c, err.Error())
return
}
c.JSON(http.StatusOK,
gin.H{
"status": "OK",
"cmdID": cmdID,
})
}
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