func (c *Client) Stream(path string, headers map[string]string, in io.Reader, out io.WriteCloser) error {
origin := fmt.Sprintf("https://%s", c.Host)
endpoint := fmt.Sprintf("wss://%s%s", c.Host, path)
config, err := websocket.NewConfig(endpoint, origin)
if err != nil {
return err
}
config.TlsConfig = &tls.Config{
InsecureSkipVerify: true,
}
config.Header.Set("Version", c.Version)
userpass := fmt.Sprintf("convox:%s", c.Password)
userpass_encoded := base64.StdEncoding.EncodeToString([]byte(userpass))
config.Header.Add("Authorization", fmt.Sprintf("Basic %s", userpass_encoded))
for k, v := range headers {
config.Header.Add(k, v)
}
config.TlsConfig = &tls.Config{
InsecureSkipVerify: true,
}
var ws *websocket.Conn
if proxy := os.Getenv("HTTPS_PROXY"); proxy != "" {
ws, err = c.proxyWebsocket(config, proxy)
} else {
ws, err = websocket.DialConfig(config)
}
if err != nil {
return err
}
defer ws.Close()
var wg sync.WaitGroup
if in != nil {
go io.Copy(ws, in)
}
if out != nil {
wg.Add(1)
go copyAsync(out, ws, &wg)
}
wg.Wait()
out.Close()
return nil
}
func AppLogs(ws *websocket.Conn) *httperr.Error {
app := mux.Vars(ws.Request())["app"]
a, err := models.GetApp(app)
if awsError(err) == "ValidationError" {
return httperr.Errorf(404, "no such app: %s", app)
}
if err != nil {
return httperr.Server(err)
}
logs := make(chan []byte)
done := make(chan bool)
a.SubscribeLogs(logs, done)
go signalWsClose(ws, done)
for data := range logs {
ws.Write(data)
}
return nil
}
// Sends "true" to the done channel when either
// the websocket is closed or after a timeout
func signalWsClose(ws *websocket.Conn, done chan bool) {
buf := make([]byte, 0)
expires := time.Now().Add(RequestTimeout)
for {
_, err := ws.Read(buf)
expired := time.Now().After(expires)
if err == io.EOF || expired {
done <- true
return
}
}
}
func keepAlive(ws *websocket.Conn, quit chan bool) {
c := time.Tick(5 * time.Second)
b := []byte{}
for {
select {
case <-c:
ws.Write(b)
case <-quit:
return
}
}
}
func BuildLogs(ws *websocket.Conn) *httperr.Error {
vars := mux.Vars(ws.Request())
app := vars["app"]
build := vars["build"]
_, err := models.GetApp(app)
if awsError(err) == "ValidationError" {
return httperr.Errorf(404, "no such app: %s", app)
}
_, err = models.GetBuild(app, build)
if err != nil {
return httperr.Server(err)
}
// proxy to docker container logs
// https://docs.docker.com/reference/api/docker_remote_api_v1.19/#get-container-logs
client, err := docker.NewClient("unix:///var/run/docker.sock")
if err != nil {
return httperr.Server(err)
}
r, w := io.Pipe()
quit := make(chan bool)
go scanLines(r, ws)
go keepAlive(ws, quit)
err = client.Logs(docker.LogsOptions{
Container: fmt.Sprintf("build-%s", build),
Follow: true,
Stdout: true,
Stderr: true,
Tail: "all",
RawTerminal: false,
OutputStream: w,
ErrorStream: w,
})
quit <- true
return httperr.Server(err)
}
func ProcessExecAttached(ws *websocket.Conn) *httperr.Error {
vars := mux.Vars(ws.Request())
app := vars["app"]
pid := vars["pid"]
command := ws.Request().Header.Get("Command")
a, err := models.GetApp(app)
if awsError(err) == "ValidationError" {
return httperr.Errorf(404, "no such app: %s", app)
}
if err != nil {
return httperr.Server(err)
}
return httperr.Server(a.ExecAttached(pid, command, ws))
}
func ServiceLogs(ws *websocket.Conn) *httperr.Error {
service := mux.Vars(ws.Request())["service"]
s, err := models.GetService(service)
if err != nil {
return httperr.Server(err)
}
logs := make(chan []byte)
done := make(chan bool)
s.SubscribeLogs(logs, done)
go signalWsClose(ws, done)
for data := range logs {
ws.Write(data)
}
return nil
}
func ProcessRunAttached(ws *websocket.Conn) *httperr.Error {
vars := mux.Vars(ws.Request())
header := ws.Request().Header
app := vars["app"]
process := vars["process"]
command := header.Get("Command")
height, _ := strconv.Atoi(header.Get("Height"))
width, _ := strconv.Atoi(header.Get("Width"))
a, err := models.GetApp(app)
if awsError(err) == "ValidationError" {
return httperr.Errorf(404, "no such app: %s", app)
}
if err != nil {
return httperr.Server(err)
}
return httperr.Server(a.RunAttached(process, command, height, width, ws))
}
func InstanceSSH(ws *websocket.Conn) *httperr.Error {
vars := mux.Vars(ws.Request())
id := vars["id"]
cmd := ws.Request().Header.Get("Command")
term := ws.Request().Header.Get("Terminal")
var height, width int
var err error
if term != "" {
height, err = strconv.Atoi(ws.Request().Header.Get("Height"))
if err != nil {
return httperr.Server(err)
}
width, err = strconv.Atoi(ws.Request().Header.Get("Width"))
if err != nil {
return httperr.Server(err)
}
}
return httperr.Server(models.InstanceSSH(id, cmd, term, height, width, ws))
}
func Proxy(ws *websocket.Conn) *httperr.Error {
vars := mux.Vars(ws.Request())
host := vars["host"]
port := vars["port"]
conn, err := net.DialTimeout("tcp", fmt.Sprintf("%s:%s", host, port), 3*time.Second)
if neterr, ok := err.(net.Error); ok && neterr.Timeout() {
return httperr.Errorf(403, "timeout")
}
if err != nil {
return httperr.Server(err)
}
var wg sync.WaitGroup
wg.Add(2)
go copyAsync(ws, conn, &wg)
go copyAsync(conn, ws, &wg)
wg.Wait()
return nil
}
func scanLines(r io.Reader, ws *websocket.Conn) {
scanner := bufio.NewScanner(r)
for scanner.Scan() {
parts := strings.SplitN(scanner.Text(), "|", 2)
if len(parts) < 2 {
ws.Write([]byte(parts[0] + "\n"))
continue
}
switch parts[0] {
case "manifest":
case "error":
ws.Write([]byte(parts[1] + "\n"))
default:
ws.Write([]byte(parts[1] + "\n"))
}
}
}
func BuildLogs(ws *websocket.Conn) *httperr.Error {
vars := mux.Vars(ws.Request())
app := vars["app"]
build := vars["build"]
_, err := models.GetApp(app)
if awsError(err) == "ValidationError" {
return httperr.Errorf(404, "no such app: %s", app)
}
_, err = models.GetBuild(app, build)
if err != nil {
return httperr.Server(err)
}
// default to local docker socket
host := "unix:///var/run/docker.sock"
// in production loop through docker hosts that the rack is running on
// to find the build
if os.Getenv("DEVELOPMENT") != "true" {
pss, err := models.ListProcesses(os.Getenv("RACK"))
if err != nil {
return httperr.Server(err)
}
for _, ps := range pss {
client, err := ps.Docker()
if err != nil {
return httperr.Server(err)
}
res, err := client.ListContainers(docker.ListContainersOptions{
All: true,
Filters: map[string][]string{
"name": []string{fmt.Sprintf("build-%s", build)},
},
})
if len(res) > 0 {
host = fmt.Sprintf("http://%s:2376", ps.Host)
break
}
}
}
fmt.Printf("host %+v\n", host)
// proxy to docker container logs
// https://docs.docker.com/reference/api/docker_remote_api_v1.19/#get-container-logs
client, err := docker.NewClient(host)
if err != nil {
return httperr.Server(err)
}
r, w := io.Pipe()
quit := make(chan bool)
go scanLines(r, ws)
go keepAlive(ws, quit)
err = client.Logs(docker.LogsOptions{
Container: fmt.Sprintf("build-%s", build),
Follow: true,
Stdout: true,
Stderr: true,
Tail: "all",
RawTerminal: false,
OutputStream: w,
ErrorStream: w,
})
quit <- true
return httperr.Server(err)
}