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How to use Connect method of cdp Package

Best Rod code snippet using cdp.Connect

tab.go

Source:tab.go

1package chrome2import (3	"context"4	"encoding/base64"5	"fmt"6	"github.com/mafredri/cdp"7	"github.com/mafredri/cdp/protocol/dom"8	"github.com/mafredri/cdp/protocol/emulation"9	"github.com/mafredri/cdp/protocol/page"10	"github.com/mafredri/cdp/protocol/runtime"11	"github.com/mafredri/cdp/protocol/target"12	"github.com/mafredri/cdp/rpcc"13	"log"14	"time"15)16type Tab interface {17	Navigate(url string, timeout time.Duration) (bool, error)18	GetHTML(timeout time.Duration) (string, error)19	CaptureScreenshot(opts ScreenshotOpts, timeout time.Duration) (string, error)20	Exec(javascript string, timeout time.Duration) (*runtime.EvaluateReply, error)21	GetClient() *cdp.Client22	GetTargetID() target.ID23	AttachHook(hook ClientHook)24}25type ClientHook func(c *cdp.Client) error26type ClientHooks []ClientHook27type tab struct {28	// target id of a single tab29	id target.ID30	// port on which chrome process is listening for dev tools protocol31	port *int32	// connection to connect with the browser33	conn *rpcc.Conn34	// client to control the browser35	client *cdp.Client36	// hooks to attach additional functionality to client, enable domains etc37	hooks ClientHooks38}39func (t *tab) connect(timeout time.Duration) error {40	ctx, cancel := context.WithTimeout(context.Background(), timeout)41	defer cancel()42	var err error43	// connect to chrome44	t.conn, err = rpcc.DialContext(45		ctx,46		fmt.Sprintf("ws://127.0.0.1:%v/devtools/page/%v", IntValue(t.port), t.id),47	)48	if err != nil {49		log.Println("go-chrome-framework error: unable to connect to target", err.Error())50		return err51	}52	// This cdp Client controls the tab.53	t.client = cdp.NewClient(t.conn)54	// execute hooks for current target55	for _, hook := range t.hooks {56		err := hook(t.client)57		if err != nil {58			log.Println("go-chrome-framework error: unable to execute hook", err.Error())59			return err60		}61	}62	return nil63}64func (t *tab) disconnect() error {65	return t.conn.Close()66}67func (t *tab) Navigate(url string, timeout time.Duration) (bool, error) {68	ctx, cancel := context.WithTimeout(context.Background(), timeout)69	defer cancel()70	if t.conn == nil {71		err := t.connect(timeout)72		if err != nil {73			return false, err74		}75	}76	// Open a DOMContentEventFired Client to buffer this event.77	domContent, err := t.client.Page.DOMContentEventFired(ctx)78	if err != nil {79		log.Println("go-chrome-framework error: unable to open dom content event fired client", err.Error())80		return false, err81	}82	defer closeRes(domContent)83	// Enable events on the Page domain, it's often preferable to create84	// event clients before enabling events so that we don't miss any.85	if err = t.client.Page.Enable(ctx); err != nil {86		log.Println("go-chrome-framework error: unable to enable page domain", err.Error())87		return false, err88	}89	// Create the Navigate arguments with the optional Referrer field set.90	navArgs := page.NewNavigateArgs(url)91	nav, err := t.client.Page.Navigate(ctx, navArgs)92	if err != nil {93		log.Println("go-chrome-framework error: unable to navigate to given url", err.Error())94		return false, err95	}96	// Wait until we have a DOMContentEventFired event.97	_, err = domContent.Recv()98	if err != nil {99		log.Println("go-chrome-framework error: unable to get dom content event", err.Error())100		return false, err101	}102	log.Printf("go-chrome-framework: page loaded with frame ID: %s\n", nav.FrameID)103	return true, nil104}105func (t *tab) GetHTML(timeout time.Duration) (string, error) {106	ctx, cancel := context.WithTimeout(context.Background(), timeout)107	defer cancel()108	if t.conn == nil {109		err := t.connect(timeout)110		if err != nil {111			return "", err112		}113	}114	// Fetch the document root node. We can pass nil here115	// since this method only takes optional arguments.116	doc, err := t.client.DOM.GetDocument(ctx, nil)117	if err != nil {118		log.Println("go-chrome-framework error: unable to get DOM root node", err.Error())119		return "", err120	}121	// Get the outer HTML for the page.122	result, err := t.client.DOM.GetOuterHTML(ctx, &dom.GetOuterHTMLArgs{123		NodeID: &doc.Root.NodeID,124	})125	if err != nil {126		log.Println("go-chrome-framework error: unable to get outer html", err.Error())127		return "", err128	}129	return result.OuterHTML, nil130}131func (t *tab) CaptureScreenshot(opts ScreenshotOpts, timeout time.Duration) (string, error) {132	ctx, cancel := context.WithTimeout(context.Background(), timeout)133	defer cancel()134	if t.conn == nil {135		err := t.connect(timeout)136		if err != nil {137			return "", err138		}139	}140	// Fetch the document root node. We can pass nil here141	// since this method only takes optional arguments.142	doc, err := t.client.DOM.GetDocument(ctx, nil)143	if err != nil {144		log.Println("go-chrome-framework error: unable to get DOM root node", err.Error())145		return "", err146	}147	querySelectorArgs := dom.NewQuerySelectorArgs(doc.Root.NodeID, "body")148	bodyNode, err := t.client.DOM.QuerySelector(ctx, querySelectorArgs)149	if err != nil {150		log.Println("go-chrome-framework error: unable to get DOM root node", err.Error())151		return "", err152	}153	getBoxModelArgs := dom.NewGetBoxModelArgs().SetNodeID(bodyNode.NodeID)154	bodyBoxModel, err := t.client.DOM.GetBoxModel(ctx, getBoxModelArgs)155	if err != nil {156		log.Println("go-chrome-framework error: unable to get DOM root node", err.Error())157		return "", err158	}159	if opts.Width == 0 {160		opts.Width = 800161	}162	if opts.Height == 0 {163		opts.Height = bodyBoxModel.Model.Height164	}165	if opts.DeviceScaleFactor == 0 {166		opts.DeviceScaleFactor = 1.0167	}168	deviceMetricsOverrideArgs := emulation.NewSetDeviceMetricsOverrideArgs(opts.Width, opts.Height, opts.DeviceScaleFactor, opts.Mobile)169	err = t.client.Emulation.SetDeviceMetricsOverride(ctx, deviceMetricsOverrideArgs)170	screenshotArgs := page.NewCaptureScreenshotArgs().SetFormat("png").SetQuality(80)171	screenshot, err := t.client.Page.CaptureScreenshot(ctx, screenshotArgs)172	if err != nil {173		// error174		return "", err175	}176	image := fmt.Sprintf("data:image/png;base64,%v", base64.StdEncoding.EncodeToString(screenshot.Data))177	return image, nil178}179func (t *tab) Exec(javascript string, timeout time.Duration) (*runtime.EvaluateReply, error) {180	ctx, cancel := context.WithTimeout(context.Background(), timeout)181	defer cancel()182	if t.conn == nil {183		err := t.connect(timeout)184		if err != nil {185			return nil, err186		}187	}188	evalArgs := runtime.NewEvaluateArgs(javascript).SetAwaitPromise(true).SetReturnByValue(true)189	return t.client.Runtime.Evaluate(ctx, evalArgs)190}191func (t *tab) GetClient() *cdp.Client {192	if t.client == nil {193		err := t.connect(120 * time.Second)194		if err != nil {195			log.Println("unable to connect", err)196			return nil197		}198	}199	return t.client200}201func (t *tab) GetTargetID() target.ID {202	return t.id203}204func (t *tab) AttachHook(hook ClientHook) {205	t.hooks = append(t.hooks, hook)206}...

websocket_test.go

Source:websocket_test.go

...51		g.Eq(r.URL.Query().Get("q"), "ok")52		close(wait)53	})54	ws := cdp.WebSocket{}55	err := ws.Connect(g.Context(), s.URL("/a?q=ok"), http.Header{56		"Host": {"test.com"},57		"Test": {"header"},58	})59	<-wait60	g.Eq(err.Error(), "websocket bad handshake: 200 OK. ")61}62func newPage(ctx context.Context, g got.G) (*cdp.Client, string) {63	l := launcher.New()64	g.Cleanup(l.Kill)65	client := cdp.New().Start(cdp.MustConnectWS(l.MustLaunch()))66	go func() {67		for range client.Event() {68		}69	}()70	file, err := filepath.Abs(filepath.FromSlash("fixtures/basic.html"))71	g.E(err)72	res, err := client.Call(ctx, "", "Target.createTarget", map[string]interface{}{73		"url": "file://" + file,74	})75	g.E(err)76	targetID := gson.New(res).Get("targetId").String()77	res, err = client.Call(ctx, "", "Target.attachToTarget", map[string]interface{}{78		"targetId": targetID,79		"flatten":  true,80	})81	g.E(err)82	sessionID := gson.New(res).Get("sessionId").String()83	return client, sessionID84}85func TestDuplicatedConnectErr(t *testing.T) {86	g := setup(t)87	l := launcher.New()88	g.Cleanup(l.Kill)89	u := l.MustLaunch()90	ws := &cdp.WebSocket{}91	g.E(ws.Connect(g.Context(), u, nil))92	g.Panic(func() {93		_ = ws.Connect(g.Context(), u, nil)94	})95}...

example_test.go

Source:example_test.go

...12	ctx := context.Background()13	// launch a browser14	url := launcher.New().MustLaunch()15	// create a controller16	client := cdp.New().Start(cdp.MustConnectWS(url))17	go func() {18		for range client.Event() {19			// you must consume the events20		}21	}()22	// Such as call this endpoint on the api doc:23	// https://chromedevtools.github.io/devtools-protocol/tot/Page#method-navigate24	// This will create a new tab and navigate to the test.com25	res, err := client.Call(ctx, "", "Target.createTarget", map[string]string{26		"url": "http://test.com",27	})28	utils.E(err)29	fmt.Println(len(gson.New(res).Get("targetId").Str()))30	// close browser by using the proto lib to encode json31	_ = proto.BrowserClose{}.Call(client)32	// Output: 3233}34func Example_customize_cdp_log() {35	ws := cdp.MustConnectWS(launcher.New().MustLaunch())36	cdp.New().37		Logger(utils.Log(func(args ...interface{}) {38			switch v := args[0].(type) {39			case *cdp.Request:40				fmt.Printf("id: %d", v.ID)41			}42		})).43		Start(ws)44}...

Connect

Using AI Code Generation

1import (2func main() {3	ctx, cancel := chromedp.NewContext(4		context.Background(),5		chromedp.WithLogf(log.Printf),6	defer cancel()7	err := chromedp.Run(ctx, chromedp.Tasks{8		chromedp.WaitVisible(`#searchform`, chromedp.ByID),9		chromedp.Value(`#lst-ib`, &res, chromedp.ByID),10	})11	if err != nil {12		log.Fatal(err)13	}14	fmt.Printf("Search box value: %s15}16import (17func main() {18	ctx, cancel := chromedp.NewContext(context.Background())19	defer cancel()20	err := chromedp.Run(ctx, chromedp.Tasks{21		chromedp.WaitVisible(`#searchform`, chromedp.ByID),22		chromedp.Value(`#lst-ib`, &res, chromedp.ByID),23	})24	if err != nil {25		log.Fatal(err)26	}27	fmt.Printf("Search box value: %s28}29import (30func main() {31	ctx, cancel := chromedp.NewContext(context.Background())32	defer cancel()33	err := chromedp.Run(ctx, chromedp.Tasks{34		chromedp.WaitVisible(`#searchform`, chromedp.ByID),35		chromedp.Value(`#lst-ib`, &res, chromedp.ByID),36	})37	if err != nil {38		log.Fatal(err

Connect

Using AI Code Generation

1import (2func main() {3	ctx, cancel := chromedp.NewContext(4	defer cancel()5	err := chromedp.Run(ctx,6		chromedp.WaitVisible(`#hplogo`),7		chromedp.Click(`#hplogo`),8		chromedp.OuterHTML(`#hplogo`, &res),9	if err != nil {10		log.Fatal(err)11	}12	fmt.Println(res)13}14import (15func main() {16	ctx, cancel := chromedp.NewContext(17	defer cancel()18	err := chromedp.Run(ctx,19		chromedp.WaitVisible(`#hplogo`),20		chromedp.Click(`#hplogo`),21		chromedp.OuterHTML(`#hplogo`, &res),22	if err != nil {23		log.Fatal(err)24	}25	fmt.Println(res)26}27import (28func main() {29	ctx, cancel := chromedp.NewContext(30	defer cancel()31	err := chromedp.Run(ctx,32		chromedp.WaitVisible(`#hplogo`),33		chromedp.Click(`#hplogo`),34		chromedp.OuterHTML(`#hplogo`, &res),35	if err != nil {36		log.Fatal(err)37	}38	fmt.Println(res)39}

Connect

Using AI Code Generation

1import (2func main() {3    c := cdp.New()4    if err != nil {5        fmt.Println(err)6    }7    c.Close()8}9import (10func main() {11    c := cdp.New()

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