/
endpoints_console.go
213 lines (173 loc) · 4.7 KB
/
endpoints_console.go
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package server
import (
"encoding/json"
"errors"
"fmt"
"io"
"net/http"
"strconv"
"github.com/gorilla/websocket"
"github.com/netsoc/webspaced/internal/webspace"
"github.com/netsoc/webspaced/pkg/util"
log "github.com/sirupsen/logrus"
)
type consoleResizeReq struct {
Width int `json:"width"`
Height int `json:"height"`
}
func (s *Server) apiConsole(w http.ResponseWriter, r *http.Request) {
if !websocket.IsWebSocketUpgrade(r) {
util.JSONErrResponse(w, util.ErrWebsocket, 0)
return
}
ws := r.Context().Value(keyWebspace).(*webspace.Webspace)
conn, err := upgrader.Upgrade(w, r, nil)
if err != nil {
log.WithError(err).Error("Failed to upgrade HTTP connection")
}
var initialSize consoleResizeReq
if err := conn.ReadJSON(&initialSize); err != nil {
util.WSCloseError(conn, fmt.Errorf("failed to parse resize request: %w", err))
return
}
rw, resize, err := ws.Console(initialSize.Width, initialSize.Height)
if err != nil {
util.WSCloseError(conn, fmt.Errorf("failed to connect to console: %w", err))
return
}
defer rw.Close()
sockRW := util.NewWebsocketIO(conn, func(s string, rw *util.WebsocketIO) {
var req consoleResizeReq
if err := json.Unmarshal([]byte(s), &req); err != nil {
rw.Mutex.Lock()
defer rw.Mutex.Unlock()
util.WSCloseError(rw.Conn, err)
return
}
if err := resize(req.Width, req.Height); err != nil {
rw.Mutex.Lock()
defer rw.Mutex.Unlock()
util.WSCloseError(rw.Conn, err)
return
}
})
errChan := make(chan error)
pipe := func(dst io.Writer, src io.Reader) {
_, err := io.Copy(dst, src)
errChan <- err
}
go pipe(rw, sockRW)
go pipe(sockRW, rw)
if err := <-errChan; err != nil {
var ce *websocket.CloseError
if errors.As(err, &ce) && ce.Code == websocket.CloseNormalClosure {
return
}
log.WithError(err).Error("Console session failed")
}
sockRW.Close()
}
type execReq struct {
Command string `json:"command"`
}
type execRes struct {
Stdout string `json:"stdout"`
Stderr string `json:"stderr"`
ExitCode int `json:"exitCode"`
}
func (s *Server) apiExec(w http.ResponseWriter, r *http.Request) {
ws := r.Context().Value(keyWebspace).(*webspace.Webspace)
var body execReq
if err := util.ParseJSONBody(&body, w, r); err != nil {
return
}
code, stdout, stderr, err := ws.Exec(body.Command, true)
if err != nil {
util.JSONErrResponse(w, err, 0)
return
}
util.JSONResponse(w, execRes{
Stdout: stdout,
Stderr: stderr,
ExitCode: code,
}, http.StatusOK)
}
type execInteractiveControl struct {
Resize consoleResizeReq `json:"resize"`
Signal int `json:"signal"`
}
func (s *Server) apiExecInteractive(w http.ResponseWriter, r *http.Request) {
if !websocket.IsWebSocketUpgrade(r) {
util.JSONErrResponse(w, util.ErrWebsocket, 0)
return
}
ws := r.Context().Value(keyWebspace).(*webspace.Webspace)
conn, err := upgrader.Upgrade(w, r, nil)
if err != nil {
log.WithError(err).Error("Failed to upgrade HTTP connection")
}
var opts webspace.ExecOptions
if err := conn.ReadJSON(&opts); err != nil {
util.WSCloseError(conn, fmt.Errorf("failed to parse exec request: %w", err))
return
}
session, err := ws.ExecInteractive(opts)
if err != nil {
util.WSCloseError(conn, fmt.Errorf("failed to start interactive exec: %w", err))
return
}
sockRW := util.NewWebsocketIO(conn, func(s string, rw *util.WebsocketIO) {
var req execInteractiveControl
if err := json.Unmarshal([]byte(s), &req); err != nil {
rw.Mutex.Lock()
defer rw.Mutex.Unlock()
util.WSCloseError(rw.Conn, err)
return
}
if req.Resize.Width != 0 && req.Resize.Height != 0 {
if err := session.Resize(req.Resize.Width, req.Resize.Height); err != nil {
rw.Mutex.Lock()
defer rw.Mutex.Unlock()
util.WSCloseError(rw.Conn, err)
return
}
}
if req.Signal != 0 {
if err := session.Signal(req.Signal); err != nil {
rw.Mutex.Lock()
defer rw.Mutex.Unlock()
util.WSCloseError(rw.Conn, err)
return
}
}
})
errChan := make(chan error)
go func() {
exitCode, err := session.Await()
if err != nil {
errChan <- err
return
}
sockRW.Mutex.Lock()
defer sockRW.Mutex.Unlock()
sockRW.Conn.WriteMessage(websocket.CloseMessage, websocket.FormatCloseMessage(websocket.CloseNormalClosure, strconv.Itoa(exitCode)))
sockRW.Conn.Close()
<-errChan
}()
pipe := func(dst io.Writer, src io.Reader) {
_, err := io.Copy(dst, src)
errChan <- err
}
go pipe(session.IO(), sockRW)
go pipe(sockRW, session.IO())
if err := <-errChan; err != nil {
var ce *websocket.CloseError
if errors.As(err, &ce) && ce.Code == websocket.CloseNormalClosure {
return
}
sockRW.Mutex.Lock()
defer sockRW.Mutex.Unlock()
util.WSCloseError(sockRW.Conn, err)
log.WithError(err).Error("Exec session failed")
}
}