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How to use Leakless method of launcher Package

Best Rod code snippet using launcher.Leakless

launcher.go

Source:launcher.go

...32	serviceURL string33}34// New returns the default arguments to start browser.35// Headless will be enabled by default.36// Leakless will be enabled by default.37// UserDataDir will use OS tmp dir by default, this folder will usually be cleaned up by the OS after reboot.38func New() *Launcher {39	dir := defaults.Dir40	if dir == "" {41		dir = filepath.Join(DefaultUserDataDirPrefix, utils.RandString(8))42	}43	defaultFlags := map[flags.Flag][]string{44		flags.Bin:      {defaults.Bin},45		flags.Leakless: nil,46		flags.UserDataDir: {dir},47		// use random port by default48		flags.RemoteDebuggingPort: {defaults.Port},49		// enable headless by default50		flags.Headless: nil,51		// to disable the init blank window52		"no-first-run":      nil,53		"no-startup-window": nil,54		// TODO: about the "site-per-process" see https://github.com/puppeteer/puppeteer/issues/254855		"disable-features": {"site-per-process", "TranslateUI"},56		"disable-background-networking":                      nil,57		"disable-background-timer-throttling":                nil,58		"disable-backgrounding-occluded-windows":             nil,59		"disable-breakpad":                                   nil,60		"disable-client-side-phishing-detection":             nil,61		"disable-component-extensions-with-background-pages": nil,62		"disable-default-apps":                               nil,63		"disable-dev-shm-usage":                              nil,64		"disable-hang-monitor":                               nil,65		"disable-ipc-flooding-protection":                    nil,66		"disable-popup-blocking":                             nil,67		"disable-prompt-on-repost":                           nil,68		"disable-renderer-backgrounding":                     nil,69		"disable-sync":                                       nil,70		"enable-automation":                                  nil,71		"enable-features":                                    {"NetworkService", "NetworkServiceInProcess"},72		"force-color-profile":                                {"srgb"},73		"metrics-recording-only":                             nil,74		"use-mock-keychain":                                  nil,75	}76	if defaults.Show {77		delete(defaultFlags, flags.Headless)78	}79	if defaults.Devtools {80		defaultFlags["auto-open-devtools-for-tabs"] = nil81	}82	if inContainer {83		defaultFlags[flags.NoSandbox] = nil84	}85	if defaults.Proxy != "" {86		defaultFlags[flags.ProxyServer] = []string{defaults.Proxy}87	}88	ctx, cancel := context.WithCancel(context.Background())89	return &Launcher{90		ctx:       ctx,91		ctxCancel: cancel,92		Flags:     defaultFlags,93		exit:      make(chan struct{}),94		browser:   NewBrowser(),95		parser:    NewURLParser(),96		logger:    ioutil.Discard,97	}98}99// NewUserMode is a preset to enable reusing current user data. Useful for automation of personal browser.100// If you see any error, it may because you can't launch debug port for existing browser, the solution is to101// completely close the running browser. Unfortunately, there's no API for rod to tell it automatically yet.102func NewUserMode() *Launcher {103	ctx, cancel := context.WithCancel(context.Background())104	bin, _ := LookPath()105	return &Launcher{106		ctx:       ctx,107		ctxCancel: cancel,108		Flags: map[flags.Flag][]string{109			flags.RemoteDebuggingPort: {"37712"},110			"no-startup-window":       nil,111			flags.Bin:                 {bin},112		},113		browser: NewBrowser(),114		exit:    make(chan struct{}),115		parser:  NewURLParser(),116		logger:  ioutil.Discard,117	}118}119// NewAppMode is a preset to run the browser like a native application.120func NewAppMode(u string) *Launcher {121	l := New()122	l.Set(flags.App, u).123		Set(flags.Env, "GOOGLE_API_KEY=no").124		Headless(false).125		Delete("no-startup-window").126		Delete("enable-automation")127	return l128}129// Context sets the context130func (l *Launcher) Context(ctx context.Context) *Launcher {131	ctx, cancel := context.WithCancel(ctx)132	l.ctx = ctx133	l.parser.Context(ctx)134	l.ctxCancel = cancel135	return l136}137// Set a command line argument to launch the browser.138func (l *Launcher) Set(name flags.Flag, values ...string) *Launcher {139	if strings.Contains(string(name), "=") {140		panic("flag name should not contain '='")141	}142	l.Flags[l.normalizeFlag(name)] = values143	return l144}145// Get flag's first value146func (l *Launcher) Get(name flags.Flag) string {147	if list, has := l.GetFlags(name); has {148		return list[0]149	}150	return ""151}152// Has flag or not153func (l *Launcher) Has(name flags.Flag) bool {154	_, has := l.GetFlags(name)155	return has156}157// GetFlags from settings158func (l *Launcher) GetFlags(name flags.Flag) ([]string, bool) {159	flag, has := l.Flags[l.normalizeFlag(name)]160	return flag, has161}162// Append values to the flag163func (l *Launcher) Append(name flags.Flag, values ...string) *Launcher {164	flags, has := l.GetFlags(name)165	if !has {166		flags = []string{}167	}168	return l.Set(name, append(flags, values...)...)169}170// Delete a flag171func (l *Launcher) Delete(name flags.Flag) *Launcher {172	delete(l.Flags, l.normalizeFlag(name))173	return l174}175// Bin of the browser binary path to launch, if the path is not empty the auto download will be disabled176func (l *Launcher) Bin(path string) *Launcher {177	return l.Set(flags.Bin, path)178}179// Revision of the browser to auto download180func (l *Launcher) Revision(rev int) *Launcher {181	l.browser.Revision = rev182	return l183}184// Headless switch. Whether to run browser in headless mode. A mode without visible UI.185func (l *Launcher) Headless(enable bool) *Launcher {186	if enable {187		return l.Set(flags.Headless)188	}189	return l.Delete(flags.Headless)190}191// NoSandbox switch. Whether to run browser in no-sandbox mode.192// Linux users may face "running as root without --no-sandbox is not supported" in some Linux/Chrome combinations. This function helps switch mode easily.193// Be aware disabling sandbox is not trivial. Use at your own risk.194// Related doc: https://bugs.chromium.org/p/chromium/issues/detail?id=638180195func (l *Launcher) NoSandbox(enable bool) *Launcher {196	if enable {197		return l.Set(flags.NoSandbox)198	}199	return l.Delete(flags.NoSandbox)200}201// XVFB enables to run browser in by XVFB. Useful when you want to run headful mode on linux.202func (l *Launcher) XVFB(args ...string) *Launcher {203	return l.Set(flags.XVFB, args...)204}205// Leakless switch. If enabled, the browser will be force killed after the Go process exits.206// The doc of leakless: https://github.com/ysmood/leakless.207func (l *Launcher) Leakless(enable bool) *Launcher {208	if enable {209		return l.Set(flags.Leakless)210	}211	return l.Delete(flags.Leakless)212}213// Devtools switch to auto open devtools for each tab214func (l *Launcher) Devtools(autoOpenForTabs bool) *Launcher {215	if autoOpenForTabs {216		return l.Set("auto-open-devtools-for-tabs")217	}218	return l.Delete("auto-open-devtools-for-tabs")219}220// UserDataDir is where the browser will look for all of its state, such as cookie and cache.221// When set to empty, browser will use current OS home dir.222// Related doc: https://chromium.googlesource.com/chromium/src/+/master/docs/user_data_dir.md223func (l *Launcher) UserDataDir(dir string) *Launcher {224	if dir == "" {225		l.Delete(flags.UserDataDir)226	} else {227		l.Set(flags.UserDataDir, dir)228	}229	return l230}231// ProfileDir is the browser profile the browser will use.232// When set to empty, the profile 'Default' is used.233// Related article: https://superuser.com/a/377195234func (l *Launcher) ProfileDir(dir string) *Launcher {235	if dir == "" {236		l.Delete("profile-directory")237	} else {238		l.Set("profile-directory", dir)239	}240	return l241}242// RemoteDebuggingPort to launch the browser. Zero for a random port. Zero is the default value.243// If it's not zero and the Launcher.Leakless is disabled, the launcher will try to reconnect to it first,244// if the reconnection fails it will launch a new browser.245func (l *Launcher) RemoteDebuggingPort(port int) *Launcher {246	return l.Set(flags.RemoteDebuggingPort, fmt.Sprintf("%d", port))247}248// Proxy switch. When disabled leakless will be disabled.249func (l *Launcher) Proxy(host string) *Launcher {250	return l.Set(flags.ProxyServer, host)251}252// WorkingDir to launch the browser process.253func (l *Launcher) WorkingDir(path string) *Launcher {254	return l.Set(flags.WorkingDir, path)255}256// Env to launch the browser process. The default value is os.Environ().257// Usually you use it to set the timezone env. Such as:258//     Env(append(os.Environ(), "TZ=Asia/Tokyo")...)259func (l *Launcher) Env(env ...string) *Launcher {260	return l.Set(flags.Env, env...)261}262// StartURL to launch263func (l *Launcher) StartURL(u string) *Launcher {264	return l.Set("", u)265}266// FormatArgs returns the formated arg list for cli267func (l *Launcher) FormatArgs() []string {268	execArgs := []string{}269	for k, v := range l.Flags {270		if k == flags.Arguments {271			continue272		}273		if strings.HasPrefix(string(k), "rod-") {274			continue275		}276		// fix a bug of chrome, if path is not absolute chrome will hang277		if k == flags.UserDataDir {278			abs, err := filepath.Abs(v[0])279			utils.E(err)280			v[0] = abs281		}282		str := "--" + string(k)283		if v != nil {284			str += "=" + strings.Join(v, ",")285		}286		execArgs = append(execArgs, str)287	}288	execArgs = append(execArgs, l.Flags[flags.Arguments]...)289	sort.Strings(execArgs)290	return execArgs291}292// Logger to handle stdout and stderr from browser.293// For example, pipe all browser output to stdout: launcher.New().Logger(os.Stdout)294func (l *Launcher) Logger(w io.Writer) *Launcher {295	l.logger = w296	return l297}298// MustLaunch is similar to Launch299func (l *Launcher) MustLaunch() string {300	u, err := l.Launch()301	utils.E(err)302	return u303}304// Launch a standalone temp browser instance and returns the debug url.305// bin and profileDir are optional, set them to empty to use the default values.306// If you want to reuse sessions, such as cookies, set the UserDataDir to the same location.307func (l *Launcher) Launch() (string, error) {308	defer l.ctxCancel()309	bin, err := l.getBin()310	if err != nil {311		return "", err312	}313	var ll *leakless.Launcher314	var cmd *exec.Cmd315	if l.Has(flags.Leakless) && leakless.Support() {316		ll = leakless.New()317		cmd = ll.Command(bin, l.FormatArgs()...)318	} else {319		port := l.Get(flags.RemoteDebuggingPort)320		u, err := ResolveURL(port)321		if err == nil {322			return u, nil323		}324		cmd = exec.Command(bin, l.FormatArgs()...)325	}326	l.setupCmd(cmd)327	err = cmd.Start()328	if err != nil {329		return "", err...

leakless.go

Source:leakless.go

...36func (l *Launcher) Command(name string, arg ...string) *exec.Cmd {37	bin := ""38	func() {39		defer LockPort(l.Lock)()40		bin = GetLeaklessBin()41	}()42	uid := fmt.Sprintf("%x", utils.RandBytes(16))43	addr := l.serve(uid)44	arg = append([]string{uid, addr, name}, arg...)45	return exec.Command(bin, arg...)46}47// Pid signals the pid of the guarded sub-process. The channel may never receive the pid.48func (l *Launcher) Pid() chan int {49	return l.pid50}51// Err message from the guard process52func (l *Launcher) Err() string {53	return l.err54}55func (l *Launcher) serve(uid string) string {56	srv, err := net.Listen("tcp", "127.0.0.1:0")57	if err != nil {58		panic("[leakless] serve error: " + err.Error())59	}60	go func() {61		defer func() { _ = srv.Close() }()62		conn, err := srv.Accept()63		if err != nil {64			l.err = err.Error()65			l.pid <- 066			return67		}68		enc := json.NewEncoder(conn)69		err = enc.Encode(shared.Message{UID: uid})70		if err != nil {71			l.err = err.Error()72			l.pid <- 073			return74		}75		dec := json.NewDecoder(conn)76		var msg shared.Message77		err = dec.Decode(&msg)78		if err == nil {79			l.err = msg.Error80			l.pid <- msg.PID81		}82		_ = dec.Decode(&msg)83	}()84	return srv.Addr().String()85}86var leaklessDir = filepath.Join(os.TempDir(), "leakless-"+shared.Version)87// GetLeaklessBin returns the executable path of the guard, if it doesn't exists create one.88func GetLeaklessBin() string {89	bin := filepath.Join(leaklessDir, "leakless")90	if runtime.GOOS == "windows" {91		bin += ".exe"92	}93	if !utils.FileExists(bin) {94		name := utils.GetTarget().BinName()95		raw, err := base64.StdEncoding.DecodeString(leaklessBinaries[name])96		utils.E(err)97		gr, err := gzip.NewReader(bytes.NewBuffer(raw))98		utils.E(err)99		data, err := ioutil.ReadAll(gr)100		utils.E(err)101		utils.E(gr.Close())102		err = utils.OutputFile(bin, data, nil)...

Leakless

Using AI Code Generation

1import (2func main() {3	cmd := exec.Command("java", "Launcher")4	cmd.SysProcAttr = &syscall.SysProcAttr{5	}6	err := cmd.Run()7	if err != nil {8		fmt.Println(err)9	}10}11public class Launcher {12    public static void main(String[] args) {13        try {14            Process p = Runtime.getRuntime().exec("java -jar test.jar");15            p.waitFor();16        } catch (Exception e) {17            e.printStackTrace();18        }19    }20}21public class test {22    public static void main(String[] args) {23        try {24            Thread.sleep(10000);25        } catch (Exception e) {26            e.printStackTrace();27        }28    }29}30cmd := exec.Command("java", "-jar", "test.jar")31cmd.SysProcAttr = &syscall.SysProcAttr{32}33err := cmd.Run()34if err != nil {35    fmt.Println(err)36}37cmd := exec.Command("java", "-jar", "test.jar")38cmd.SysProcAttr = &syscall.SysProcAttr{39}40err := cmd.Run()41if err != nil {42    fmt.Println(err)43}44cmd := exec.Command("java", "-jar", "test.jar")45cmd.SysProcAttr = &syscall.SysProcAttr{46}47err := cmd.Run()48if err != nil {49    fmt.Println(err)50}

Leakless

Using AI Code Generation

1import (2func main() {3	runtime.GOMAXPROCS(1)4	runtime.SetFinalizer(&runtime.Launcher{}, func(l *runtime.Launcher) {5		fmt.Println("Launcher finalizer")6	})7	fmt.Println("Starting launcher")8	launcher := runtime.NewLauncher()9	fmt.Println("Launcher started")10	launcher.Launch(func() {11		fmt.Println("Running")12	})13	fmt.Println("Launched")14	time.Sleep(time.Second)15	fmt.Println("Done")16}17import (18func main() {19	runtime.GOMAXPROCS(1)20	runtime.SetFinalizer(&runtime.Launcher{}, func(l *runtime.Launcher) {21		fmt.Println("Launcher finalizer")22	})23	fmt.Println("Starting launcher")24	launcher := runtime.NewLauncher()25	fmt.Println("Launcher started")26	launcher.Launch(func() {27		fmt.Println("Running")28	})29	fmt.Println("Launched")30	launcher.Launch(func() {31		fmt.Println("Running")32	})33	fmt.Println("Launched")34	time.Sleep(time.Second)35	fmt.Println("Done")36}37import (38func main() {39	runtime.GOMAXPROCS(1)40	runtime.SetFinalizer(&runtime.Launcher{}, func(l *runtime.Launcher) {41		fmt.Println("Launcher finalizer")42	})43	fmt.Println("Starting launcher")44	launcher := runtime.NewLauncher()45	fmt.Println("Launcher started")46	launcher.Launch(func() {47		fmt.Println("Running")48	})49	fmt.Println("Launched")50	launcher.Launch(func() {51		fmt.Println("Running")52	})53	fmt.Println("Launched")54	launcher.Launch(func() {55		fmt.Println("Running")56	})57	fmt.Println("Launched")58	time.Sleep(time.Second)59	fmt.Println("Done")60}61import (62func main() {63	runtime.GOMAXPROCS(1)64	runtime.SetFinalizer(&runtime.Launcher{}, func(l *runtime.Launcher

Leakless

Using AI Code Generation

1public class Launcher {2    public static void main(String[] args) {3        new Thread(() -> {4            try {5                Thread.sleep(1000);6            } catch (InterruptedException e) {7                e.printStackTrace();8            }9            System.out.println("Hello from thread");10        }).start();11    }12}13public class Launcher {14    public static void main(String[] args) throws InterruptedException {15        Thread thread = new Thread(() -> {16            try {17                Thread.sleep(1000);18            } catch (InterruptedException e) {19                e.printStackTrace();20            }21            System.out.println("Hello from thread");22        });23        thread.start();24        thread.join();25    }26}

Leakless

Using AI Code Generation

1import (2func main() {3	fmt.Println("Hello World!")4	runtime.GC()5}6import (7func main() {8	fmt.Println("Hello World!")9	runtime.GC()10}11import (12func main() {13	fmt.Println("Hello World!")14	runtime.GC()15}16import (17func main() {18	fmt.Println("Hello World!")19	runtime.GC()20}21import (22func main() {23	fmt.Println("Hello World!")24	runtime.GC()25}26import (27func main() {28	fmt.Println("Hello World!")29	runtime.GC()30}31import (32func main() {33	fmt.Println("Hello World!")34	runtime.GC()35}36import (37func main() {38	fmt.Println("Hello World!")39	runtime.GC()40}41import (42func main() {43	fmt.Println("Hello World!")44	runtime.GC()45}46import (47func main() {48	fmt.Println("Hello World!")49	runtime.GC()50}51import (52func main() {53	fmt.Println("Hello World!")54	runtime.GC()

Leakless

Using AI Code Generation

1import (2func main() {3	l := launcher.NewLauncher()4	l.Start()5	l = launcher.NewLauncher("Test Launcher")6	l.Start()7	l = launcher.NewLauncher("Test Launcher", "icon.png")8	l.Start()9	l = launcher.NewLauncher("Test Launcher", "icon.png", "1.0")10	l.Start()11	l = launcher.NewLauncher("Test Launcher", "icon.png", "1.0", 600, 400)12	l.Start()13	l = launcher.NewLauncher("Test Launcher", "icon.png", "1.0", 600, 400, "#00FF00")14	l.Start()15	l = launcher.NewLauncher("Test Launcher", "icon.png", "1.0", 600, 400, "#00FF00", "#0000FF")16	l.Start()17	l = launcher.NewLauncher("Test Launcher", "icon.png", "1.0", 600, 400, "#00FF00", "#0000FF", "Arial")18	l.Start()19	l = launcher.NewLauncher("Test Launcher", "icon.png", "1.0", 600, 400, "#00FF00", "#0000FF", "Arial", 20)20	l.Start()

Leakless

Using AI Code Generation

1import (2var (3func main() {4	context = gls.NewContext()5	context.Set("key", "value")6	go func() {7		v := context.Get("key")8		fmt.Println(v)9	}()10	context.Wait()11}12import (13var (14func main() {15	context = gls.NewContext()16	context.Set("key", "value")17	go func() {18		v := context.Get("key")19		fmt.Println(v)20	}()21	context.Wait()22}23import (24var (25func main() {26	context = gls.NewContext()27	context.Set("key", "value")28	go func() {29		v := context.Get("key")30		fmt.Println(v)31	}()32	context.Wait()33}34import (35var (36func main() {37	context = gls.NewContext()38	context.Set("key", "value")39	go func() {40		v := context.Get("key")41		fmt.Println(v)42	}()43	context.Wait()44}

Leakless

Using AI Code Generation

1import (2func main() {3	l := goczmq.NewLauncher()4	l.Start()5	w := goczmq.NewWorker()6	w.SetExecutable("./1.exe")7	w.Start()8	c := goczmq.NewClient()9	c.SetTimeout(1000)10	c.Send("Hello")11	msg, _ := c.Recv()12	fmt.Println("Received:", msg)13	w.Stop()14	l.Stop()15}16import (17func main() {18	s := goczmq.NewServer()19	s.Start()20	msg, _ := s.Recv()21	fmt.Println("Received:", msg)22	s.Send("World")23	s.Stop()24}25import (26func main() {27	s := goczmq.NewServer()28	s.Start()

Leakless

Using AI Code Generation

1import (2type launcher struct {3	call func()4}5func hello() {6	fmt.Println("Hello World")7}8type object struct {9}10func main() {11	o := new(object)12	l := launcher{13		object: unsafe.Pointer(o),14	}15	l.call()16}17import (18type launcher struct {19	call   func()20}21func hello() {22	fmt.Println("Hello World")23}24type object struct {25}26func main() {27	o := new(object)28	l := launcher{29		object: unsafe.Pointer(o),30	}31	l.call()32}33import (34type launcher struct {35	call   func()36}37func hello() {38	fmt.Println("Hello World")39}40type object struct {41}42func main() {43	o := new(object)44	l := launcher{45		object: unsafe.Pointer(o),46	}47	l.call()48}49import (50type launcher struct {51	call   func()52}53func hello() {54	fmt.Println("Hello World")55}56type object struct {57}58func main()

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