Merge branch 'master' of https://github.com/MontFerret/ferret

.github/FUNDING.yml

@@ -0,0 +1,5 @@
+# These are supported funding model platforms
+
+github: []
+patreon: ziflex
+open_collective: ferret

.github/stale.yml

@@ -16,6 +16,7 @@ exemptLabels:
   - proposal
   - refactoring
   - bug
+  - help wanted
 
 # Set to true to ignore issues in a project (defaults to false)
 exemptProjects: false
@@ -27,7 +28,7 @@ exemptMilestones: true
 exemptAssignees: false
 
 # Label to use when marking as stale
-staleLabel: wontfix
+staleLabel: stale
 
 # Comment to post when marking as stale. Set to `false` to disable
 markComment: >

.golangci.yml

@@ -0,0 +1,33 @@
+# This file contains all available configuration options
+# with their default values.
+
+# options for analysis running
+run:
+  # which dirs to skip: they won't be analyzed;
+  # can use regexp here: generated.*, regexp is applied on full path;
+  # default value is empty list, but next dirs are always skipped independently
+  # from this option's value:
+  #   	vendor$, third_party$, testdata$, examples$, Godeps$, builtin$
+  skip-dirs:
+    - pkg/parser/fql
+    - pkg/parser/antlr
+
+linters:
+  disable:
+    - errcheck
+
+issues:
+  # List of regexps of issue texts to exclude, empty list by default.
+  # But independently from this option we use default exclude patterns,
+  # it can be disabled by `exclude-use-default: false`. To list all
+  # excluded by default patterns execute `golangci-lint run --help`
+  exclude:
+    - '^(G104|G401|G505|G501):'
+    - '^shadow: declaration of'
+
+  # which files to skip: they will be analyzed, but issues from them
+  # won't be reported. Default value is empty list, but there is
+  # no need to include all autogenerated files, we confidently recognize
+  # autogenerated files. If it's not please let us know.
+  skip-files:
+    - "*_test.go"

.travis.yml

@@ -18,6 +18,7 @@ addons:
 
 install:
 - go get -u github.com/mgechev/revive
+- go get -u github.com/golangci/golangci-lint/cmd/golangci-lint
 - sudo curl -o /usr/local/lib/antlr-4.7.1-complete.jar https://www.antlr.org/download/antlr-4.7.1-complete.jar
 - export CLASSPATH=".:/usr/local/lib/antlr-4.7.1-complete.jar:$CLASSPATH"
 - mkdir $HOME/travis-bin

Makefile

@@ -30,7 +30,7 @@ cover:
 	curl -s https://codecov.io/bash | bash
 
 e2e:
-	go run ${DIR_E2E}/main.go --tests ${DIR_E2E}/tests --pages ${DIR_E2E}/pages --filter doc_cookie_set*
+	go run ${DIR_E2E}/main.go --tests ${DIR_E2E}/tests --pages ${DIR_E2E}/pages
 
 bench:
 	go test -run=XXX -bench=. ${DIR_PKG}/...
@@ -48,7 +48,8 @@ fmt:
 # https://github.com/mgechev/revive
 # go get github.com/mgechev/revive
 lint:
-	revive -config revive.toml -formatter friendly -exclude ./pkg/parser/fql/... -exclude ./vendor/... ./...
+	revive -config revive.toml -formatter friendly -exclude ./pkg/parser/fql/... -exclude ./vendor/... ./... && \
+	golangci-lint run ./pkg/...
 
 # http://godoc.org/code.google.com/p/go.tools/cmd/vet
 # go get code.google.com/p/go.tools/cmd/vet

README.md

@@ -532,12 +532,26 @@ LET doc = DOCUMENT("https://www.google.com", {
     ]
 })
 
-COOKIES_SET(doc, { name: "baz", value: "qaz"}, { name: "daz", value: "gag" })
+COOKIE_SET(doc, { name: "baz", value: "qaz"}, { name: "daz", value: "gag" })
-COOKIES_DEL(doc, "foo")
+COOKIE_DEL(doc, "foo")
 
-LET c = COOKIES_GET(doc, "baz")
+LET c = COOKIE_GET(doc, "baz")
 
 FOR cookie IN doc.cookies
     RETURN cookie.name
 	
 ```
+
+## Sponsors
+
+Support this project by becoming a sponsor. Your logo will show up here with a link to your website.    
+
+<p>
+    <a href="https://opencollective.com/ferret/sponsor/0/website" target="_blank"><img src="https://opencollective.com/ferret/sponsor/0/avatar.svg"></a>
+</p>
+
+<p align="center">
+    <a href="https://opencollective.com/ferret/donate" target="_blank">
+        <img src="https://opencollective.com/ferret/donate/button@2x.png?color=blue" width="300" />
+    </a>
+</p>

cli/browser/browser.go

@@ -62,7 +62,7 @@ func (b *Browser) Close() error {
 		return nil
 	}
 
-	os.RemoveAll(tmpDir)
+	err = os.RemoveAll(tmpDir)
 
 	if err != nil {
 		return err

cli/browser/launcher.go

@@ -47,7 +47,7 @@ func Launch(setters ...Option) (*Browser, error) {
 
 	temporaryUserDataDir := opts.userDataDir
 
-	if temporaryUserDataDir == "" && opts.noUserDataDir == false {
+	if temporaryUserDataDir == "" && !opts.noUserDataDir {
 		dirName, err := ioutil.TempDir(os.TempDir(), "ferret_dev_profile-")
 
 		if err != nil {

e2e/main.go

@@ -4,13 +4,15 @@ import (
 	"context"
 	"flag"
 	"fmt"
-	"github.com/MontFerret/ferret/e2e/runner"
+	"net"
-	"github.com/MontFerret/ferret/e2e/server"
-	"github.com/rs/zerolog"
 	"os"
 	"os/signal"
 	"path/filepath"
-	"regexp"
+
+	"github.com/MontFerret/ferret/e2e/runner"
+	"github.com/MontFerret/ferret/e2e/server"
+
+	"github.com/rs/zerolog"
 )
 
 var (
@@ -39,6 +41,20 @@ var (
 	)
 )
 
+func getOutboundIP() (net.IP, error) {
+	conn, err := net.Dial("udp", "8.8.8.8:80")
+
+	if err != nil {
+		return nil, err
+	}
+
+	defer conn.Close()
+
+	localAddr := conn.LocalAddr().(*net.UDPAddr)
+
+	return localAddr.IP, nil
+}
+
 func main() {
 	flag.Parse()
 
@@ -56,19 +72,6 @@ func main() {
 		Dir:  filepath.Join(*pagesDir, "dynamic"),
 	})
 
-	var filterR *regexp.Regexp
-
-	if *filter != "" {
-		r, err := regexp.Compile(*filter)
-
-		if err != nil {
-			fmt.Println(err.Error())
-			os.Exit(1)
-		}
-
-		filterR = r
-	}
-
 	go func() {
 		if err := static.Start(); err != nil {
 			logger.Info().Timestamp().Msg("shutting down the static pages server")
@@ -81,26 +84,35 @@ func main() {
 		}
 	}()
 
-	dirname := *testsDir
+	if *testsDir == "" {
-
+		_, err := filepath.Abs(filepath.Dir(os.Args[0]))
-	if dirname == "" {
-		d, err := filepath.Abs(filepath.Dir(os.Args[0]))
 
 		if err != nil {
 			logger.Fatal().Timestamp().Err(err).Msg("failed to get testsDir")
 
 			return
 		}
+	}
 
-		dirname = d
+	var ipAddr string
+
+	// we need it in those cases when a Chrome instance is running inside a container
+	// and it needs an external IP to get access to our static web server
+	outIP, err := getOutboundIP()
+
+	if err != nil {
+		ipAddr = "0.0.0.0"
+		logger.Warn().Err(err).Msg("Failed to get outbound IP address")
+	} else {
+		ipAddr = outIP.String()
 	}
 
 	r := runner.New(logger, runner.Settings{
-		StaticServerAddress:  fmt.Sprintf("http://0.0.0.0:%d", staticPort),
+		StaticServerAddress:  fmt.Sprintf("http://%s:%d", ipAddr, staticPort),
-		DynamicServerAddress: fmt.Sprintf("http://0.0.0.0:%d", dynamicPort),
+		DynamicServerAddress: fmt.Sprintf("http://%s:%d", ipAddr, dynamicPort),
 		CDPAddress:           *cdp,
 		Dir:                  *testsDir,
-		Filter:               filterR,
+		Filter:               *filter,
 	})
 
 	ctx, cancel := context.WithCancel(context.Background())
@@ -114,7 +126,7 @@ func main() {
 		}
 	}()
 
-	err := r.Run(ctx)
+	err = r.Run(ctx)
 
 	if err != nil {
 		os.Exit(1)

e2e/pages/dynamic/components/app.js

@@ -2,6 +2,7 @@ import Layout from './layout.js';
 import IndexPage from './pages/index.js';
 import FormsPage from './pages/forms/index.js';
 import EventsPage from './pages/events/index.js';
+import IframePage from './pages/iframes/index.js';
 
 const e = React.createElement;
 const Router = ReactRouter.Router;
@@ -10,7 +11,26 @@ const Route = ReactRouter.Route;
 const Redirect = ReactRouter.Redirect;
 const createBrowserHistory = History.createBrowserHistory;
 
-export default function AppComponent({ redirect = null}) {
+export default React.memo(function AppComponent(params = {}) {
+    let redirectTo;
+
+    if (params.redirect) {
+        let search = '';
+
+        Object.keys(params).forEach((key) => {
+            if (key !== 'redirect') {
+                search += `${key}=${params[key]}`;
+            }
+        });
+
+        const to = {
+            pathname: params.redirect,
+            search: search ? `?${search}` : '',
+        };
+
+        redirectTo = e(Redirect, { to });
+    }
+
     return e(Router, { history: createBrowserHistory() },
         e(Layout, null, [
             e(Switch, null, [
@@ -27,8 +47,12 @@ export default function AppComponent({ redirect = null}) {
                     path: '/events',
                     component: EventsPage
                 }),
+                e(Route, {
+                    path: '/iframe',
+                    component: IframePage
+                }),
             ]),
-            redirect ? e(Redirect, { to: redirect }) : null
+            redirectTo
         ])
     )
-}
+})

e2e/pages/dynamic/components/layout.js

@@ -18,6 +18,9 @@ export default function Layout({ children }) {
                     ]),
                     e("li", { className: "nav-item"}, [
                         e(NavLink, { className: "nav-link", to: "/events" }, "Events")
+                    ]),
+                    e("li", { className: "nav-item"}, [
+                        e(NavLink, { className: "nav-link", to: "/iframe" }, "iFrame")
                     ])
                 ])
             ])

e2e/pages/dynamic/components/pages/iframes/index.js

@@ -0,0 +1,26 @@
+import { parse } from '../../../utils/qs.js';
+
+const e = React.createElement;
+
+export default class IFramePage extends React.Component {
+    render() {
+        const search = parse(this.props.location.search);
+
+        let redirect;
+
+        if (search.src) {
+            redirect = search.src;
+        }
+
+        return e("div", { id: "iframe" }, [
+            e("iframe", {
+                name: 'nested',
+                style: {
+                    width: '100%',
+                    height: '800px',
+                },
+                src: redirect ? `/?redirect=${redirect}` : '/'
+            }),
+        ])
+    }
+}

e2e/pages/dynamic/index.html

@@ -11,9 +11,9 @@
     </head>
     <body class="text-center">
         <div id="root"></div>
-        <script src="https://unpkg.com/react@16.6.1/umd/react.production.min.js"></script>
+        <script src="https://unpkg.com/react@16.8.6/umd/react.production.min.js"></script>
-        <script src="https://unpkg.com/react-dom@16.6.1/umd/react-dom.production.min.js"></script>
+        <script src="https://unpkg.com/react-dom@16.8.6/umd/react-dom.production.min.js"></script>
-        <script src="https://unpkg.com/history@4.7.2/umd/history.min.js"></script>
+        <script src="https://unpkg.com/history@4.9.0/umd/history.min.js"></script>
         <script src="https://unpkg.com/react-router@4.3.1/umd/react-router.js"></script>
         <script src="https://unpkg.com/react-router-dom@4.3.1/umd/react-router-dom.js"></script>
         <script src="index.js" type="module"></script>

e2e/runner/lib.go

@@ -3,6 +3,8 @@ package runner
 import (
 	"context"
 	"fmt"
+	"io/ioutil"
+	"net/http"
 
 	"github.com/MontFerret/ferret/pkg/runtime/core"
 	"github.com/MontFerret/ferret/pkg/runtime/values"
@@ -11,6 +13,8 @@ import (
 func Assertions() map[string]core.Function {
 	return map[string]core.Function{
 		"EXPECT":       expect,
+		"T::EXPECT":    expect,
+		"T::HTTP::GET": httpGet,
 	}
 }
 
@@ -27,3 +31,29 @@ func expect(_ context.Context, args ...core.Value) (core.Value, error) {
 
 	return values.NewString(fmt.Sprintf(`expected "%s", but got "%s"`, args[0], args[1])), nil
 }
+
+func httpGet(_ context.Context, args ...core.Value) (core.Value, error) {
+	err := core.ValidateArgs(args, 1, 2)
+
+	if err != nil {
+		return values.None, err
+	}
+
+	url := args[0].String()
+
+	resp, err := http.Get(url)
+
+	if err != nil {
+		return values.None, err
+	}
+
+	defer resp.Body.Close()
+
+	b, err := ioutil.ReadAll(resp.Body)
+
+	if err != nil {
+		return values.None, err
+	}
+
+	return values.String(b), nil
+}

e2e/runner/runner.go

@@ -6,7 +6,6 @@ import (
 	"io/ioutil"
 	"os"
 	"path/filepath"
-	"regexp"
 	"time"
 
 	"github.com/MontFerret/ferret/pkg/compiler"
@@ -14,6 +13,8 @@ import (
 	"github.com/MontFerret/ferret/pkg/drivers/cdp"
 	"github.com/MontFerret/ferret/pkg/drivers/http"
 	"github.com/MontFerret/ferret/pkg/runtime"
+
+	"github.com/gobwas/glob"
 	"github.com/pkg/errors"
 	"github.com/rs/zerolog"
 )
@@ -24,7 +25,7 @@ type (
 		DynamicServerAddress string
 		CDPAddress           string
 		Dir                  string
-		Filter               *regexp.Regexp
+		Filter               string
 	}
 
 	Result struct {
@@ -84,7 +85,7 @@ func (r *Runner) Run(ctx context.Context) error {
 		Timestamp().
 		Int("passed", sum.passed).
 		Int("failed", sum.failed).
-		Dur("time", sum.duration).
+		Str("duration", sum.duration.String()).
 		Msg("Completed")
 
 	if sum.failed > 0 {
@@ -95,19 +96,7 @@ func (r *Runner) Run(ctx context.Context) error {
 }
 
 func (r *Runner) runQueries(ctx context.Context, dir string) ([]Result, error) {
-	files, err := ioutil.ReadDir(dir)
+	results := make([]Result, 0, 50)
-
-	if err != nil {
-		r.logger.Error().
-			Timestamp().
-			Err(err).
-			Str("dir", dir).
-			Msg("failed to read scripts directory")
-
-		return nil, err
-	}
-
-	results := make([]Result, 0, len(files))
 
 	c := compiler.New()
 
@@ -115,48 +104,71 @@ func (r *Runner) runQueries(ctx context.Context, dir string) ([]Result, error) {
 		return nil, err
 	}
 
-	// read scripts
+	var filter glob.Glob
-	for _, f := range files {
+	var useFilter bool
-		n := f.Name()
 
-		if r.settings.Filter != nil {
+	if r.settings.Filter != "" {
-			if r.settings.Filter.Match([]byte(n)) != true {
+		f, err := glob.Compile(r.settings.Filter)
-				continue
+
+		if err != nil {
+			return nil, err
+		}
+
+		filter = f
+		useFilter = true
+	}
+
+	err := r.traverseDir(ctx, dir, func(name string) error {
+		if useFilter {
+			if !filter.Match(name) {
+				return nil
 			}
 		}
 
-		fName := filepath.Join(dir, n)
+		b, err := ioutil.ReadFile(name)
-		b, err := ioutil.ReadFile(fName)
 
 		if err != nil {
 			results = append(results, Result{
-				name: fName,
+				name: name,
 				err:  errors.Wrap(err, "failed to read script file"),
 			})
 
-			continue
+			return nil
 		}
 
-		r.logger.Info().Timestamp().Str("name", fName).Msg("Running test")
+		r.logger.Info().Timestamp().Str("name", name).Msg("Running test")
 
-		result := r.runQuery(ctx, c, fName, string(b))
+		select {
+		case <-ctx.Done():
+			return context.Canceled
+		default:
+			result := r.runQuery(ctx, c, name, string(b))
 
 			if result.err == nil {
 				r.logger.Info().
 					Timestamp().
 					Str("file", result.name).
+					Str("duration", result.duration.String()).
 					Msg("Test passed")
 			} else {
 				r.logger.Error().
 					Timestamp().
 					Err(result.err).
 					Str("file", result.name).
+					Str("duration", result.duration.String()).
 					Msg("Test failed")
 			}
 
 			results = append(results, result)
 		}
 
+		return nil
+	})
+
+	if err != nil {
+		return nil, err
+	}
+
 	return results, nil
 }
 
@@ -180,7 +192,7 @@ func (r *Runner) runQuery(ctx context.Context, c *compiler.FqlCompiler, name, sc
 		runtime.WithParam("dynamic", r.settings.DynamicServerAddress),
 	)
 
-	duration := time.Now().Sub(start)
+	duration := time.Since(start)
 
 	if err != nil {
 		return Result{
@@ -237,3 +249,35 @@ func (r *Runner) report(results []Result) Summary {
 		duration: sumDuration,
 	}
 }
+
+func (r *Runner) traverseDir(ctx context.Context, dir string, iteratee func(name string) error) error {
+	files, err := ioutil.ReadDir(dir)
+
+	if err != nil {
+		r.logger.Error().
+			Timestamp().
+			Err(err).
+			Str("dir", dir).
+			Msg("failed to read scripts directory")
+
+		return err
+	}
+
+	for _, file := range files {
+		name := filepath.Join(dir, file.Name())
+
+		if file.IsDir() {
+			if err := r.traverseDir(ctx, name, iteratee); err != nil {
+				return err
+			}
+
+			continue
+		}
+
+		if err := iteratee(name); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}

e2e/server/server.go

@@ -2,10 +2,13 @@ package server
 
 import (
 	"context"
+	"encoding/json"
 	"fmt"
-	"github.com/labstack/echo"
 	"net/http"
 	"path/filepath"
+	"time"
+
+	"github.com/labstack/echo"
 )
 
 type (
@@ -37,6 +40,43 @@ func New(settings Settings) *Server {
 	})
 	e.Static("/", settings.Dir)
 	e.File("/", filepath.Join(settings.Dir, "index.html"))
+	api := e.Group("/api")
+	api.GET("/ts", func(ctx echo.Context) error {
+		var headers string
+
+		if len(ctx.Request().Header) > 0 {
+			b, err := json.Marshal(ctx.Request().Header)
+
+			if err != nil {
+				return err
+			}
+
+			headers = string(b)
+		}
+
+		ts := time.Now().Format("2006-01-02 15:04:05")
+
+		return ctx.HTML(http.StatusOK, fmt.Sprintf(`
+		<!DOCTYPE html>
+		<html>
+			<head>
+				<meta charset="utf-8" />
+			</head>
+			<body>
+				<span id="timestamp">%s</span>
+				<span id="headers">%s</span>
+			</body>
+		</html>
+	`, ts, headers))
+	})
+	api.GET("/ping", func(ctx echo.Context) error {
+		return ctx.JSON(http.StatusOK, echo.Map{
+			"header": ctx.Request().Header,
+			"url":    ctx.Request().URL,
+			"data":   "pong",
+			"ts":     time.Now(),
+		})
+	})
 
 	return &Server{e, settings}
 }

e2e/tests/doc_inner_html_1_arg_d.fql

@@ -1,7 +1,7 @@
 LET url = @dynamic
 LET doc = DOCUMENT(url, true)
 
-LET expected = `<!DOCTYPE html><html lang="en"><head>
+LET expected = `<head>
                                                        <meta charset="utf-8">
                                                        <meta http-equiv="x-ua-compatible" content="ie=edge">
                                                        <title>Ferret E2E SPA</title>
@@ -11,16 +11,16 @@ LET expected = `<!DOCTYPE html><html lang="en"><head>
                                                        <link rel="stylesheet" href="index.css">
                                                    </head>
                                                    <body class="text-center">
-                                                       <div id="root"><div id="layout"><nav class="navbar navbar-expand-md navbar-dark bg-dark mb-4" id="navbar"><a class="navbar-brand active" aria-current="page" href="/">Ferret</a><button class="navbar-toggler" type="button"><span class="navbar-toggler-icon"></span></button><div class="collapse navbar-collapse"><ul class="navbar-nav mr-auto"><li class="nav-item"><a class="nav-link" href="/forms">Forms</a></li><li class="nav-item"><a class="nav-link" href="/navigation">Navigation</a></li><li class="nav-item"><a class="nav-link" href="/events">Events</a></li></ul></div></nav><main class="container"><div class="jumbotron" data-type="page" id="index"><div><h1>Welcome to Ferret E2E test page!</h1></div><div><p class="lead">It has several pages for testing different possibilities of the library</p></div></div></main></div></div>
+                                                       <div id="root"><div id="layout"><nav class="navbar navbar-expand-md navbar-dark bg-dark mb-4" id="navbar"><a class="navbar-brand active" aria-current="page" href="/">Ferret</a><button class="navbar-toggler" type="button"><span class="navbar-toggler-icon"></span></button><div class="collapse navbar-collapse"><ul class="navbar-nav mr-auto"><li class="nav-item"><a class="nav-link" href="/forms">Forms</a></li><li class="nav-item"><a class="nav-link" href="/navigation">Navigation</a></li><li class="nav-item"><a class="nav-link" href="/events">Events</a></li><li class="nav-item"><a class="nav-link" href="/iframe">iFrame</a></li></ul></div></nav><main class="container"><div class="jumbotron" data-type="page" id="index"><div><h1>Welcome to Ferret E2E test page!</h1></div><div><p class="lead">It has several pages for testing different possibilities of the library</p></div></div></main></div></div>
-                                                       <script src="https://unpkg.com/react@16.6.1/umd/react.production.min.js"></script>
+                                                       <script src="https://unpkg.com/react@16.8.6/umd/react.production.min.js"></script>
-                                                       <script src="https://unpkg.com/react-dom@16.6.1/umd/react-dom.production.min.js"></script>
+                                                       <script src="https://unpkg.com/react-dom@16.8.6/umd/react-dom.production.min.js"></script>
-                                                       <script src="https://unpkg.com/history@4.7.2/umd/history.min.js"></script>
+                                                       <script src="https://unpkg.com/history@4.9.0/umd/history.min.js"></script>
                                                        <script src="https://unpkg.com/react-router@4.3.1/umd/react-router.js"></script>
                                                        <script src="https://unpkg.com/react-router-dom@4.3.1/umd/react-router-dom.js"></script>
                                                        <script src="index.js" type="module"></script>
 
 
-                                               </body></html>`
+                                               </body>`
 LET actual = INNER_HTML(doc)
 
 LET r1 = '(\s|\")'

e2e/tests/doc_inner_text_1_arg_d.fql

@@ -1,11 +1,11 @@
 LET url = @dynamic
 LET doc = DOCUMENT(url, true)
 
-LET expected = `Ferret E2E SPA
+LET expected = `Ferret
-Ferret
 Forms
 Navigation
 Events
+iFrame
 Welcome to Ferret E2E test page!
 It has several pages for testing different possibilities of the library
 `

e2e/tests/dynamic/doc/iframes/element_exists.fql

@@ -0,0 +1,12 @@
+LET url = @dynamic + "?redirect=/iframe"
+LET page = DOCUMENT(url, { driver: 'cdp' })
+
+LET doc = page.frames[1]
+
+LET expectedP = TRUE
+LET actualP = ELEMENT_EXISTS(doc, '.text-center')
+
+LET expectedN = FALSE
+LET actualN = ELEMENT_EXISTS(doc, '.foo-bar')
+
+RETURN EXPECT(expectedP + expectedN, actualP + expectedN)

e2e/tests/dynamic/doc/iframes/hover.fql

@@ -0,0 +1,12 @@
+LET url = @dynamic + "?redirect=/iframe&src=/events"
+LET page = DOCUMENT(url, { driver: 'cdp' })
+LET doc = page.frames[1]
+
+WAIT_ELEMENT(doc, "#page-events")
+
+HOVER(doc, "#hoverable-btn")
+WAIT_ELEMENT(doc, "#hoverable-content")
+
+LET output = INNER_TEXT(doc, "#hoverable-content")
+
+RETURN EXPECT(output, "Lorem ipsum dolor sit amet.")

e2e/tests/dynamic/doc/iframes/input.fql

@@ -0,0 +1,11 @@
+LET url = @dynamic + "?redirect=/iframe&src=/forms"
+LET page = DOCUMENT(url, true)
+LET doc = page.frames[1]
+
+WAIT_ELEMENT(doc, "form")
+
+LET output = ELEMENT(doc, "#text_output")
+
+INPUT(doc, "#text_input", "foo")
+
+RETURN EXPECT(output.innerText, "foo")

e2e/tests/dynamic/doc/iframes/length.fql

@@ -0,0 +1,4 @@
+LET url = @dynamic + "?redirect=/iframe"
+LET doc = DOCUMENT(url, { driver: 'cdp' })
+
+RETURN EXPECT(2, LENGTH(doc.frames))

e2e/tests/dynamic/doc/iframes/wait_class.fql

@@ -0,0 +1,15 @@
+LET url = @dynamic + "?redirect=/iframe&src=/events"
+LET page = DOCUMENT(url, true)
+LET doc = page.frames[1]
+
+WAIT_ELEMENT(doc, "#page-events")
+
+// with fixed timeout
+CLICK(doc, "#wait-class-btn")
+WAIT_CLASS(doc, "#wait-class-content", "alert-success")
+
+// with random timeout
+CLICK(doc, "#wait-class-random-btn")
+WAIT_CLASS(doc, "#wait-class-random-content", "alert-success", 10000)
+
+RETURN ""

e2e/tests/dynamic/doc/xpath/count.fql

@@ -0,0 +1,6 @@
+LET url = @dynamic
+LET page = DOCUMENT(url, true)
+
+LET actual = XPATH(page, "count(//body)")
+
+RETURN EXPECT(1, actual)

e2e/tests/dynamic/doc/xpath/query.fql

@@ -0,0 +1,6 @@
+LET url = @dynamic + "?redirect=/forms"
+LET page = DOCUMENT(url, true)
+
+LET actual = XPATH(page, "//div[contains(@class, 'form-group')]")
+
+RETURN EXPECT(4, LENGTH(actual))

e2e/tests/dynamic/element/iframes/hover.fql

@@ -0,0 +1,14 @@
+LET url = @dynamic + "?redirect=/iframe&src=/events"
+LET page = DOCUMENT(url, { driver: 'cdp' })
+LET doc = page.frames[1]
+
+WAIT_ELEMENT(doc, "#page-events")
+
+LET input = ELEMENT(doc, "#hoverable-btn")
+
+HOVER(input)
+WAIT_ELEMENT(doc, "#hoverable-content")
+
+LET output = ELEMENT(doc, "#hoverable-content")
+
+RETURN EXPECT(output.innerText, "Lorem ipsum dolor sit amet.")

e2e/tests/dynamic/element/iframes/input.fql

@@ -0,0 +1,12 @@
+LET url = @dynamic + "?redirect=/iframe&src=/forms"
+LET page = DOCUMENT(url, { driver: 'cdp' })
+LET doc = page.frames[1]
+
+WAIT_ELEMENT(doc, "form")
+
+LET input = ELEMENT(doc, "#text_input")
+LET output = ELEMENT(doc, "#text_output")
+
+INPUT(input, "foo")
+
+RETURN EXPECT(output.innerText, "foo")

e2e/tests/dynamic/element/iframes/select_single.fql

@@ -0,0 +1,11 @@
+LET url = @dynamic + "?redirect=/iframe&src=/forms"
+LET page = DOCUMENT(url, { driver: 'cdp' })
+LET doc = page.frames[1]
+
+WAIT_ELEMENT(doc, "form")
+
+LET input = ELEMENT(doc, "#select_input")
+LET output = ELEMENT(doc, "#select_output")
+LET result = SELECT(input, ["4"])
+
+RETURN EXPECT(output.innerText, "4") + EXPECT(JSON_STRINGIFY(result), '["4"]')

e2e/tests/dynamic/element/iframes/wait_class.fql

@@ -0,0 +1,23 @@
+LET url = @dynamic + "?redirect=/iframe&src=/events"
+LET page = DOCUMENT(url, { driver: 'cdp' })
+LET doc = page.frames[1]
+
+WAIT_ELEMENT(doc, "#page-events")
+
+// with fixed timeout
+LET b1 = ELEMENT(doc, "#wait-class-btn")
+LET c1 = ELEMENT(doc, "#wait-class-content")
+
+WAIT(2000)
+CLICK(b1)
+
+WAIT_CLASS(c1, "alert-success")
+
+// with random timeout
+LET b2 = ELEMENT(doc, "#wait-class-random-btn")
+LET c2 = ELEMENT(doc, "#wait-class-random-content")
+
+CLICK(b2)
+WAIT_CLASS(c2, "alert-success", 10000)
+
+RETURN ""

e2e/tests/dynamic/element/xpath/count.fql

@@ -0,0 +1,7 @@
+LET url = @dynamic
+LET page = DOCUMENT(url, true)
+
+LET el = ELEMENT(page, 'main')
+LET actual = XPATH(el, "count(//p)")
+
+RETURN EXPECT(1, actual)

e2e/tests/dynamic/element/xpath/query.fql

@@ -0,0 +1,7 @@
+LET url = @dynamic + "?redirect=/forms"
+LET page = DOCUMENT(url, true)
+
+LET element = ELEMENT(page, '#page-form')
+LET actual = XPATH(element, "//div[contains(@class, 'form-group')]")
+
+RETURN EXPECT(4, LENGTH(actual))

e2e/tests/el_inner_html_1_arg_d.fql

@@ -2,7 +2,7 @@ LET url = @dynamic
 LET doc = DOCUMENT(url, true)
 LET el = ELEMENT(doc, "#root")
 
-LET expected = `<div id="layout"><nav class="navbar navbar-expand-md navbar-dark bg-dark mb-4" id="navbar"><a class="navbar-brand active" aria-current="page" href="/">Ferret</a><button class="navbar-toggler" type="button"><span class="navbar-toggler-icon"></span></button><div class="collapse navbar-collapse"><ul class="navbar-nav mr-auto"><li class="nav-item"><a class="nav-link" href="/forms">Forms</a></li><li class="nav-item"><a class="nav-link" href="/navigation">Navigation</a></li><li class="nav-item"><a class="nav-link" href="/events">Events</a></li></ul></div></nav><main class="container"><div class="jumbotron" data-type="page" id="index"><div><h1>Welcome to Ferret E2E test page!</h1></div><div><p class="lead">It has several pages for testing different possibilities of the library</p></div></div></main></div>`
+LET expected = `<div id="layout"><nav class="navbar navbar-expand-md navbar-dark bg-dark mb-4" id="navbar"><a class="navbar-brand active" aria-current="page" href="/">Ferret</a><button class="navbar-toggler" type="button"><span class="navbar-toggler-icon"></span></button><div class="collapse navbar-collapse"><ul class="navbar-nav mr-auto"><li class="nav-item"><a class="nav-link" href="/forms">Forms</a></li><li class="nav-item"><a class="nav-link" href="/navigation">Navigation</a></li><li class="nav-item"><a class="nav-link" href="/events">Events</a></li><li class="nav-item"><a class="nav-link" href="/iframe">iFrame</a></li></ul></div></nav><main class="container"><div class="jumbotron" data-type="page" id="index"><div><h1>Welcome to Ferret E2E test page!</h1></div><div><p class="lead">It has several pages for testing different possibilities of the library</p></div></div></main></div>`
 LET actual = INNER_HTML(el)
 
 LET r1 = '(\s|\")'

e2e/tests/el_value_d.fql

@@ -1,12 +1,9 @@
-LET url = @static + '/value.html'
+LET url = @dynamic + "?redirect=/forms"
 LET doc = DOCUMENT(url, true)
 
-LET expected = ["068728","068728","816410","52024413","698690","210583","049700","826394","354369","135911","700285","557242","278832","357701","313034","959368","703500","842750","777175","378061","072489","383005","843393","59912263","464535","229710","230550","767964","758862","944384","025449","010245","844935","038760","013450","124139","211145","758761","448667","488966"]
+LET el = ELEMENT(doc, "#select_input")
 
-LET actual = (
+LET expected = "1"
-	FOR tr IN ELEMENTS(doc, '#listings_table > tbody > tr')
+LET actual = el.value
-		LET elem = ELEMENT(tr, 'td > input')
-		RETURN elem.value
-)
 
 RETURN EXPECT(actual, expected)

e2e/tests/page_load_d.fql

@@ -1,4 +1,7 @@
 LET url = @dynamic
 LET doc = DOCUMENT(url, true)
 
-RETURN EXPECT(doc.url, url)
+LET expected = url + '/'
+LET actual = doc.url
+
+RETURN EXPECT(expected, actual)

e2e/tests/static/doc/ua.fql

@@ -0,0 +1,10 @@
+LET url = @static + '/api/ts'
+LET ua = "Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) brave/0.7.10 Chrome/47.0.2526.110 Brave/0.36.5 Safari/537.36"
+LET page = DOCUMENT(url, {
+   userAgent: ua
+})
+
+LET h = ELEMENT(page, "#headers")
+LET headers = JSON_PARSE(h.innerText)
+
+RETURN T::EXPECT(ua, headers["User-Agent"][0])

e2e/tests/static/doc/xpath/count.fql

@@ -0,0 +1,6 @@
+LET url = @static + '/overview.html'
+LET page = DOCUMENT(url)
+
+LET actual = XPATH(page, "count(//body)")
+
+RETURN EXPECT(1, actual)

e2e/tests/static/doc/xpath/query.fql

@@ -0,0 +1,6 @@
+LET url = @static + '/value.html'
+LET page = DOCUMENT(url)
+
+LET actual = XPATH(page, "//tr[contains(@class, 'odd')]")
+
+RETURN EXPECT(20, LENGTH(actual))

e2e/tests/static/element/xpath/count.fql

@@ -0,0 +1,7 @@
+LET url = @static + '/value.html'
+LET page = DOCUMENT(url)
+
+LET el = ELEMENT(page, '#listings_table')
+LET actual = XPATH(el, "count(//tr)")
+
+RETURN EXPECT(41, actual)

e2e/tests/static/element/xpath/query.fql

@@ -0,0 +1,7 @@
+LET url = @static + '/value.html'
+LET page = DOCUMENT(url, true)
+
+LET element = ELEMENT(page, '.tablesorter')
+LET actual = XPATH(element, "//input[contains(@type, 'hidden')]")
+
+RETURN EXPECT(40, LENGTH(actual))

examples/cookies.go

@@ -2,8 +2,6 @@ package main
 
 import (
 	"context"
-	"fmt"
-	"os"
 
 	"github.com/MontFerret/ferret/pkg/compiler"
 	"github.com/MontFerret/ferret/pkg/drivers"

examples/extensible.go

@@ -10,6 +10,7 @@ import (
 	"github.com/MontFerret/ferret/pkg/compiler"
 	"github.com/MontFerret/ferret/pkg/runtime/core"
 	"github.com/MontFerret/ferret/pkg/runtime/values"
+	"github.com/MontFerret/ferret/pkg/runtime/values/types"
 )
 
 func main() {
@@ -37,7 +38,7 @@ func getStrings() ([]string, error) {
 		}
 
 		// this is another helper functions allowing to do type validation
-		err = core.ValidateType(args[0], core.StringType)
+		err = core.ValidateType(args[0], types.String)
 
 		if err != nil {
 			return values.None, err

examples/iframes.fql

@@ -0,0 +1,5 @@
+LET page = DOCUMENT("https://www.w3schools.com/html/html_iframe.asp", { driver: "cdp" })
+
+LET c2 = page.frames[1].head.innerHTML
+
+RETURN c2

examples/pagination.fql

@@ -4,14 +4,15 @@ INPUT(amazon, '#twotabsearchtextbox', @criteria)
 CLICK(amazon, '.nav-search-submit input[type="submit"]')
 WAIT_NAVIGATION(amazon)
 
-LET resultListSelector = '#s-results-list-atf'
+LET resultListSelector = 'div.s-result-list'
-LET resultItemSelector = '.s-result-item.celwidget'
+LET resultItemSelector = 'div.s-result-item'
-LET nextBtnSelector = '#pagnNextLink'
+LET nextBtnSelector = 'ul.a-pagination .a-last a'
 LET vendorSelector1 = 'div > div:nth-child(3) > div:nth-child(2) > span:nth-child(2)'
 LET vendorSelector2 = 'div > div:nth-child(5) > div:nth-child(2) > span:nth-child(2)'
 LET priceWholeSelector = 'span.sx-price-whole'
 LET priceFracSelector = 'sup.sx-price-fractional'
-LET pages = TO_INT(INNER_TEXT(amazon, '#pagn > span.pagnDisabled'))
+LET pagers = ELEMENTS(amazon, 'ul.a-pagination li.a-disabled')
+LET pages = LENGTH(pagers) > 0 ? TO_INT(INNER_TEXT(LAST(pagers))) : 0
 
 LET result = (
     FOR pageNum IN 1..pages
@@ -19,6 +20,8 @@ LET result = (
         LET wait = clicked ? WAIT_NAVIGATION(amazon) : false
         LET waitSelector = wait ? WAIT_ELEMENT(amazon, resultListSelector) : false
 
+        PRINT("page:", pageNum, "clicked", clicked)
+
         LET items = (
             FOR el IN ELEMENTS(amazon, resultItemSelector)
                 LET priceWholeTxt = INNER_TEXT(el, priceWholeSelector)

examples/screenshot.fql

@@ -0,0 +1,3 @@
+LET data = SCREENSHOT("https://github.com/MontFerret/ferret/raw/master/assets/logo.png")
+
+RETURN { type: "png", data }

go.mod

@@ -3,74 +3,42 @@ module github.com/MontFerret/ferret
 go 1.12
 
 require (
-	github.com/OpenPeeDeeP/depguard v0.0.0-20181229194401-1f388ab2d810 // indirect
+	github.com/BurntSushi/toml v0.3.1 // indirect
 	github.com/PuerkitoBio/goquery v1.5.0
-	github.com/StackExchange/wmi v0.0.0-20181212234831-e0a55b97c705 // indirect
+	github.com/antchfx/htmlquery v1.0.0
+	github.com/antchfx/xpath v1.0.0
 	github.com/antlr/antlr4 v0.0.0-20190325153624-837aa60e2c47
+	github.com/chzyer/logex v1.1.10 // indirect
 	github.com/chzyer/readline v0.0.0-20180603132655-2972be24d48e
-	github.com/coreos/etcd v3.3.12+incompatible // indirect
+	github.com/chzyer/test v0.0.0-20180213035817-a1ea475d72b1 // indirect
 	github.com/corpix/uarand v0.0.0
+	github.com/davecgh/go-spew v1.1.1 // indirect
 	github.com/derekparker/trie v0.0.0-20190322172448-1ce4922c7ad9
-	github.com/fatih/color v1.7.0 // indirect
+	github.com/gobwas/glob v0.2.3
-	github.com/go-critic/go-critic v0.3.4 // indirect
-	github.com/go-ole/go-ole v1.2.4 // indirect
-	github.com/go-toolsmith/astcast v1.0.0 // indirect
-	github.com/go-toolsmith/astcopy v1.0.0 // indirect
-	github.com/go-toolsmith/astfmt v1.0.0 // indirect
-	github.com/go-toolsmith/astp v1.0.0 // indirect
-	github.com/go-toolsmith/pkgload v1.0.0 // indirect
-	github.com/go-toolsmith/typep v1.0.0 // indirect
 	github.com/gofrs/uuid v3.2.0+incompatible
-	github.com/gogo/protobuf v1.2.1 // indirect
+	github.com/google/go-cmp v0.2.0 // indirect
-	github.com/golang/mock v1.2.0 // indirect
-	github.com/golang/protobuf v1.3.1 // indirect
-	github.com/golangci/errcheck v0.0.0-20181223084120-ef45e06d44b6 // indirect
-	github.com/golangci/go-tools v0.0.0-20190124090046-35a9f45a5db0 // indirect
-	github.com/golangci/gocyclo v0.0.0-20180528144436-0a533e8fa43d // indirect
-	github.com/golangci/gofmt v0.0.0-20181222123516-0b8337e80d98 // indirect
-	github.com/golangci/golangci-lint v1.15.0 // indirect
-	github.com/golangci/gosec v0.0.0-20180901114220-8afd9cbb6cfb // indirect
-	github.com/golangci/lint-1 v0.0.0-20181222135242-d2cdd8c08219 // indirect
-	github.com/golangci/revgrep v0.0.0-20180812185044-276a5c0a1039 // indirect
 	github.com/gopherjs/gopherjs v0.0.0-20190328170749-bb2674552d8f // indirect
 	github.com/gorilla/css v1.0.0
 	github.com/gorilla/websocket v1.4.0 // indirect
-	github.com/kisielk/errcheck v1.2.0 // indirect
+	github.com/kr/pretty v0.1.0 // indirect
-	github.com/konsorten/go-windows-terminal-sequences v1.0.2 // indirect
-	github.com/kr/pty v1.1.4 // indirect
 	github.com/labstack/echo v3.3.10+incompatible
 	github.com/labstack/gommon v0.2.8 // indirect
-	github.com/mafredri/cdp v0.23.1
+	github.com/mafredri/cdp v0.23.4
 	github.com/mattn/go-colorable v0.1.1 // indirect
 	github.com/mattn/go-isatty v0.0.7 // indirect
-	github.com/mitchellh/go-homedir v1.1.0 // indirect
-	github.com/mozilla/tls-observatory v0.0.0-20190313211306-43961c0c7a1f // indirect
 	github.com/natefinch/lumberjack v2.0.0+incompatible
-	github.com/nbutton23/zxcvbn-go v0.0.0-20180912185939-ae427f1e4c1d // indirect
-	github.com/onsi/ginkgo v1.8.0 // indirect
-	github.com/onsi/gomega v1.5.0 // indirect
 	github.com/pkg/errors v0.8.1
-	github.com/rogpeppe/go-internal v1.2.2 // indirect
 	github.com/rs/zerolog v1.14.3
-	github.com/ryanuber/go-glob v1.0.0 // indirect
 	github.com/sethgrid/pester v0.0.0-20190127155807-68a33a018ad0
-	github.com/shirou/gopsutil v2.18.12+incompatible // indirect
-	github.com/shurcooL/go v0.0.0-20190121191506-3fef8c783dec // indirect
-	github.com/sirupsen/logrus v1.4.0 // indirect
 	github.com/smartystreets/assertions v0.0.0-20190215210624-980c5ac6f3ac // indirect
 	github.com/smartystreets/goconvey v0.0.0-20190306220146-200a235640ff
-	github.com/spf13/afero v1.2.2 // indirect
-	github.com/spf13/cobra v0.0.3 // indirect
-	github.com/spf13/jwalterweatherman v1.1.0 // indirect
-	github.com/spf13/viper v1.3.2 // indirect
 	github.com/stretchr/testify v1.3.0 // indirect
-	github.com/ugorji/go/codec v0.0.0-20190320090025-2dc34c0b8780 // indirect
 	github.com/valyala/fasttemplate v1.0.1 // indirect
 	golang.org/x/crypto v0.0.0-20190325154230-a5d413f7728c // indirect
 	golang.org/x/net v0.0.0-20190328230028-74de082e2cca
-	golang.org/x/sync v0.0.0-20190227155943-e225da77a7e6
+	golang.org/x/sync v0.0.0-20190423024810-112230192c58
 	golang.org/x/sys v0.0.0-20190322080309-f49334f85ddc // indirect
-	golang.org/x/tools v0.0.0-20190328211700-ab21143f2384 // indirect
+	gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127 // indirect
-	mvdan.cc/unparam v0.0.0-20190310220240-1b9ccfa71afe // indirect
+	gopkg.in/natefinch/lumberjack.v2 v2.0.0 // indirect
-	sourcegraph.com/sqs/pbtypes v1.0.0 // indirect
+	gopkg.in/yaml.v2 v2.2.2 // indirect
 )

go.sum

@@ -1,249 +1,105 @@
+github.com/BurntSushi/toml v0.3.1 h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ=
 github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
-github.com/OpenPeeDeeP/depguard v0.0.0-20180806142446-a69c782687b2/go.mod h1:7/4sitnI9YlQgTLLk734QlzXT8DuHVnAyztLplQjk+o=
-github.com/OpenPeeDeeP/depguard v0.0.0-20181229194401-1f388ab2d810/go.mod h1:7/4sitnI9YlQgTLLk734QlzXT8DuHVnAyztLplQjk+o=
 github.com/PuerkitoBio/goquery v1.5.0 h1:uGvmFXOA73IKluu/F84Xd1tt/z07GYm8X49XKHP7EJk=
 github.com/PuerkitoBio/goquery v1.5.0/go.mod h1:qD2PgZ9lccMbQlc7eEOjaeRlFQON7xY8kdmcsrnKqMg=
-github.com/StackExchange/wmi v0.0.0-20180116203802-5d049714c4a6/go.mod h1:3eOhrUMpNV+6aFIbp5/iudMxNCF27Vw2OZgy4xEx0Fg=
-github.com/StackExchange/wmi v0.0.0-20181212234831-e0a55b97c705/go.mod h1:3eOhrUMpNV+6aFIbp5/iudMxNCF27Vw2OZgy4xEx0Fg=
 github.com/andybalholm/cascadia v1.0.0 h1:hOCXnnZ5A+3eVDX8pvgl4kofXv2ELss0bKcqRySc45o=
 github.com/andybalholm/cascadia v1.0.0/go.mod h1:GsXiBklL0woXo1j/WYWtSYYC4ouU9PqHO0sqidkEA4Y=
+github.com/antchfx/htmlquery v1.0.0 h1:O5IXz8fZF3B3MW+B33MZWbTHBlYmcfw0BAxgErHuaMA=
+github.com/antchfx/htmlquery v1.0.0/go.mod h1:MS9yksVSQXls00iXkiMqXr0J+umL/AmxXKuP28SUJM8=
+github.com/antchfx/xpath v1.0.0 h1:Q5gFgh2O40VTSwMOVbFE7nFNRBu3tS21Tn0KAWeEjtk=
+github.com/antchfx/xpath v1.0.0/go.mod h1:Yee4kTMuNiPYJ7nSNorELQMr1J33uOpXDMByNYhvtNk=
 github.com/antlr/antlr4 v0.0.0-20190325153624-837aa60e2c47 h1:Lp5nUoQzppfVmfZadpzAytNyb5IMtxyOJLzoQS5dExg=
 github.com/antlr/antlr4 v0.0.0-20190325153624-837aa60e2c47/go.mod h1:T7PbCXFs94rrTttyxjbyT5+/1V8T2TYDejxUfHJjw1Y=
-github.com/armon/consul-api v0.0.0-20180202201655-eb2c6b5be1b6/go.mod h1:grANhF5doyWs3UAsr3K4I6qtAmlQcZDesFNEHPZAzj8=
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 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127 h1:qIbj1fsPNlZgppZ+VLlY7N33q108Sa+fhmuc+sWQYwY=
 gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
-gopkg.in/errgo.v2 v2.1.0/go.mod h1:hNsd1EY+bozCKY1Ytp96fpM3vjJbqLJn88ws8XvfDNI=
+gopkg.in/natefinch/lumberjack.v2 v2.0.0 h1:1Lc07Kr7qY4U2YPouBjpCLxpiyxIVoxqXgkXLknAOE8=
-gopkg.in/fsnotify.v1 v1.4.7/go.mod h1:Tz8NjZHkW78fSQdbUxIjBTcgA1z1m8ZHf0WmKUhAMys=
+gopkg.in/natefinch/lumberjack.v2 v2.0.0/go.mod h1:l0ndWWf7gzL7RNwBG7wST/UCcT4T24xpD6X8LsfU/+k=
-gopkg.in/gemnasium/logrus-airbrake-hook.v2 v2.1.2/go.mod h1:Xk6kEKp8OKb+X14hQBKWaSkCsqBpgog8nAV2xsGOxlo=
+gopkg.in/yaml.v2 v2.2.2 h1:ZCJp+EgiOT7lHqUV2J862kp8Qj64Jo6az82+3Td9dZw=
-gopkg.in/tomb.v1 v1.0.0-20141024135613-dd632973f1e7/go.mod h1:dt/ZhP58zS4L8KSrWDmTeBkI65Dw0HsyUHuEVlX15mw=
-gopkg.in/yaml.v2 v2.0.0-20170812160011-eb3733d160e7/go.mod h1:JAlM8MvJe8wmxCU4Bli9HhUf9+ttbYbLASfIpnQbh74=
-gopkg.in/yaml.v2 v2.2.1/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
 gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
-mvdan.cc/interfacer v0.0.0-20180901003855-c20040233aed/go.mod h1:Xkxe497xwlCKkIaQYRfC7CSLworTXY9RMqwhhCm+8Nc=
-mvdan.cc/lint v0.0.0-20170908181259-adc824a0674b/go.mod h1:2odslEg/xrtNQqCYg2/jCoyKnw3vv5biOc3JnIcYfL4=
-mvdan.cc/unparam v0.0.0-20190124213536-fbb59629db34/go.mod h1:H6SUd1XjIs+qQCyskXg5OFSrilMRUkD8ePJpHKDPaeY=
-mvdan.cc/unparam v0.0.0-20190310220240-1b9ccfa71afe/go.mod h1:BnhuWBAqxH3+J5bDybdxgw5ZfS+DsVd4iylsKQePN8o=
-sourcegraph.com/sourcegraph/go-diff v0.5.1-0.20190210232911-dee78e514455/go.mod h1:kuch7UrkMzY0X+p9CRK03kfuPQ2zzQcaEFbx8wA8rck=
-sourcegraph.com/sqs/pbtypes v0.0.0-20180604144634-d3ebe8f20ae4/go.mod h1:ketZ/q3QxT9HOBeFhu6RdvsftgpsbFHBF5Cas6cDKZ0=
-sourcegraph.com/sqs/pbtypes v1.0.0/go.mod h1:3AciMUv4qUuRHRHhOG4TZOB+72GdPVz5k+c648qsFS4=

pkg/compiler/compiler.go

@@ -1,6 +1,7 @@
 package compiler
 
 import (
+	"regexp"
 	"strings"
 
 	"github.com/MontFerret/ferret/pkg/parser"
@@ -10,6 +11,8 @@ import (
 	"github.com/pkg/errors"
 )
 
+var fnNameValidation = regexp.MustCompile("^[a-zA-Z]+[a-zA-Z0-9_]*(::[a-zA-Z]+[a-zA-Z0-9_]*)*$")
+
 type FqlCompiler struct {
 	funcs map[string]core.Function
 }
@@ -38,6 +41,11 @@ func (c *FqlCompiler) RegisterFunction(name string, fun core.Function) error {
 		return errors.Errorf("function already exists: %s", name)
 	}
 
+	// validation the name
+	if !fnNameValidation.MatchString(name) {
+		return errors.Errorf("invalid function name: %s", name)
+	}
+
 	c.funcs[strings.ToUpper(name)] = fun
 
 	return nil
@@ -57,6 +65,28 @@ func (c *FqlCompiler) RegisterFunctions(funcs map[string]core.Function) error {
 	return nil
 }
 
+func (c *FqlCompiler) RegisteredFunctions() []string {
+	res := make([]string, 0, len(c.funcs))
+
+	for k := range c.funcs {
+		res = append(res, k)
+	}
+
+	return res
+}
+
+func (c *FqlCompiler) RegisteredFunctionsNS(namespace string) []string {
+	res := make([]string, 0, len(c.funcs))
+
+	for k := range c.funcs {
+		if strings.HasPrefix(k, namespace) {
+			res = append(res, k)
+		}
+	}
+
+	return res
+}
+
 func (c *FqlCompiler) Compile(query string) (program *runtime.Program, err error) {
 	if query == "" {
 		return nil, ErrEmptyQuery
@@ -103,10 +133,3 @@ func (c *FqlCompiler) MustCompile(query string) *runtime.Program {
 
 	return program
 }
-
-func (c *FqlCompiler) RegisteredFunctions() (funcs []string) {
-	for k := range c.funcs {
-		funcs = append(funcs, k)
-	}
-	return
-}

pkg/compiler/compiler_func_ns_test.go

@@ -0,0 +1,94 @@
+package compiler_test
+
+import (
+	"context"
+	"github.com/MontFerret/ferret/pkg/compiler"
+	"github.com/MontFerret/ferret/pkg/runtime/core"
+	"github.com/MontFerret/ferret/pkg/runtime/values"
+	. "github.com/smartystreets/goconvey/convey"
+	"testing"
+)
+
+func TestFunctionNSCall(t *testing.T) {
+	Convey("Should compile RETURN T::SPY", t, func() {
+		c := compiler.New()
+
+		var counter int
+		err := c.RegisterFunction("T::SPY", func(_ context.Context, _ ...core.Value) (core.Value, error) {
+			counter++
+
+			return values.None, nil
+		})
+
+		So(err, ShouldBeNil)
+
+		p, err := c.Compile(`
+			RETURN T::SPY()
+		`)
+
+		So(err, ShouldBeNil)
+
+		_, err = p.Run(context.Background())
+
+		So(err, ShouldBeNil)
+
+		So(counter, ShouldEqual, 1)
+	})
+
+	Convey("Should compile RETURN T::UTILS::SPY", t, func() {
+		c := compiler.New()
+
+		var counter int
+		err := c.RegisterFunction("T::UTILS::SPY", func(_ context.Context, _ ...core.Value) (core.Value, error) {
+			counter++
+
+			return values.None, nil
+		})
+
+		So(err, ShouldBeNil)
+
+		p, err := c.Compile(`
+			RETURN T::UTILS::SPY()
+		`)
+
+		So(err, ShouldBeNil)
+
+		_, err = p.Run(context.Background())
+
+		So(err, ShouldBeNil)
+
+		So(counter, ShouldEqual, 1)
+	})
+
+	Convey("Should NOT compile RETURN T:UTILS::SPY", t, func() {
+		c := compiler.New()
+
+		var counter int
+		err := c.RegisterFunction("T::UTILS::SPY", func(_ context.Context, _ ...core.Value) (core.Value, error) {
+			counter++
+
+			return values.None, nil
+		})
+
+		So(err, ShouldBeNil)
+
+		_, err = c.Compile(`
+			RETURN T:UTILS::SPY()
+		`)
+
+		So(err, ShouldNotBeNil)
+	})
+
+	Convey("Should NOT register RETURN T:UTILS::SPY", t, func() {
+		c := compiler.New()
+
+		var counter int
+		err := c.RegisterFunction("T::UTILS:SPY", func(_ context.Context, _ ...core.Value) (core.Value, error) {
+			counter++
+
+			return values.None, nil
+		})
+
+		So(err, ShouldNotBeNil)
+	})
+}

pkg/compiler/compiler_str_test.go

@@ -24,13 +24,13 @@ BAR
 	})
 
 	Convey("Should be possible to use multi line string with nested strings", t, func() {
-		out := compiler.New().
+		compiler.New().
 			MustCompile(fmt.Sprintf(`
 RETURN %s<!DOCTYPE html>
 		<html lang="en">
 		<head>
 		<meta charset="UTF-8">
-		<title>Title</title>
+		<title>GetTitle</title>
 		</head>
 		<body>
 			Hello world
@@ -43,7 +43,7 @@ RETURN %s<!DOCTYPE html>
 		<html lang="en">
 		<head>
 		<meta charset="UTF-8">
-		<title>Title</title>
+		<title>GetTitle</title>
 		</head>
 		<body>
 			Hello world

pkg/compiler/compiler_test.go

@@ -1,11 +0,0 @@
-package compiler_test
-
-import (
-	"context"
-	"github.com/MontFerret/ferret/pkg/runtime/core"
-	"github.com/MontFerret/ferret/pkg/runtime/values"
-)
-
-func NOOP(_ context.Context, args ...core.Value) (core.Value, error) {
-	return values.None, nil
-}

pkg/compiler/visitor.go

@@ -426,7 +426,7 @@ func (v *visitor) doVisitCollectClause(ctx *fql.CollectClauseContext, scope *sco
 		collectSelectors := groupingCtx.AllCollectSelector()
 
 		// group selectors
-		if collectSelectors != nil && len(collectSelectors) > 0 {
+		if len(collectSelectors) > 0 {
 			selectors = make([]*clauses.CollectSelector, 0, len(collectSelectors))
 
 			for _, cs := range collectSelectors {
@@ -481,10 +481,6 @@ func (v *visitor) doVisitCollectClause(ctx *fql.CollectClauseContext, scope *sco
 
 					projectionSelectorExp := literals.NewObjectLiteralWith(propExp)
 
-					if err != nil {
-						return nil, err
-					}
-
 					selector, err := clauses.NewCollectSelector(projectionIdentifier.GetText(), projectionSelectorExp)
 
 					if err != nil {
@@ -1049,12 +1045,20 @@ func (v *visitor) doVisitFunctionCallExpression(context *fql.FunctionCallExpress
 		}
 	}
 
-	funcName := context.Identifier().GetText()
+	var name string
 
-	fun, exists := v.funcs[funcName]
+	funcNS := context.Namespace()
+
+	if funcNS != nil {
+		name += funcNS.GetText()
+	}
+
+	name += context.Identifier().GetText()
+
+	fun, exists := v.funcs[name]
 
 	if !exists {
-		return nil, core.Error(core.ErrNotFound, fmt.Sprintf("function: '%s'", funcName))
+		return nil, core.Error(core.ErrNotFound, fmt.Sprintf("function: '%s'", name))
 	}
 
 	return expressions.NewFunctionCallExpression(
@@ -1413,7 +1417,7 @@ func (v *visitor) doVisitChildren(node antlr.RuleNode, scope *scope) ([]core.Exp
 	children := node.GetChildren()
 
 	if children == nil {
-		return make([]core.Expression, 0, 0), nil
+		return make([]core.Expression, 0), nil
 	}
 
 	result := make([]core.Expression, 0, len(children))

pkg/drivers/cdp/document_test.go

@@ -0,0 +1 @@
+package cdp

pkg/drivers/cdp/driver.go

@@ -4,24 +4,21 @@ import (
 	"context"
 	"sync"
 
-	"github.com/MontFerret/ferret/pkg/drivers"
-	"github.com/MontFerret/ferret/pkg/drivers/common"
-	"github.com/MontFerret/ferret/pkg/runtime/logging"
 	"github.com/mafredri/cdp"
 	"github.com/mafredri/cdp/devtool"
-	"github.com/mafredri/cdp/protocol/emulation"
-	"github.com/mafredri/cdp/protocol/network"
-	"github.com/mafredri/cdp/protocol/page"
 	"github.com/mafredri/cdp/protocol/target"
 	"github.com/mafredri/cdp/rpcc"
 	"github.com/mafredri/cdp/session"
 	"github.com/pkg/errors"
+
+	"github.com/MontFerret/ferret/pkg/drivers"
+	"github.com/MontFerret/ferret/pkg/runtime/logging"
 )
 
 const DriverName = "cdp"
 
 type Driver struct {
-	sync.Mutex
+	mu        sync.Mutex
 	dev       *devtool.DevTools
 	conn      *rpcc.Conn
 	client    *cdp.Client
@@ -42,7 +39,7 @@ func (drv *Driver) Name() string {
 	return drv.options.Name
 }
 
-func (drv *Driver) LoadDocument(ctx context.Context, params drivers.LoadDocumentParams) (drivers.HTMLDocument, error) {
+func (drv *Driver) Open(ctx context.Context, params drivers.OpenPageParams) (drivers.HTMLPage, error) {
 	logger := logging.FromContext(ctx)
 
 	err := drv.init(ctx)
@@ -58,20 +55,15 @@ func (drv *Driver) LoadDocument(ctx context.Context, params drivers.LoadDocument
 		return nil, err
 	}
 
-	url := params.URL
+	// Args for a new target belonging to the browser context
+	createTargetArgs := target.NewCreateTargetArgs(BlankPageURL)
 
-	if url == "" {
+	if !drv.options.KeepCookies && !params.KeepCookies {
-		url = BlankPageURL
-	}
-
-	// Create a new target belonging to the browser context
-	createTargetArgs := target.NewCreateTargetArgs(url)
-
-	if drv.options.KeepCookies == false && params.KeepCookies == false {
 		// Set it to an incognito mode
 		createTargetArgs.SetBrowserContextID(drv.contextID)
 	}
 
+	// New target
 	createTarget, err := drv.client.Target.CreateTarget(ctx, createTargetArgs)
 
 	if err != nil {
@@ -99,69 +91,16 @@ func (drv *Driver) LoadDocument(ctx context.Context, params drivers.LoadDocument
 		return nil, err
 	}
 
-	client := cdp.NewClient(conn)
+	if params.UserAgent == "" {
-
+		params.UserAgent = drv.options.UserAgent
-	err = runBatch(
-		func() error {
-			return client.Page.Enable(ctx)
-		},
-
-		func() error {
-			return client.Page.SetLifecycleEventsEnabled(
-				ctx,
-				page.NewSetLifecycleEventsEnabledArgs(true),
-			)
-		},
-
-		func() error {
-			return client.DOM.Enable(ctx)
-		},
-
-		func() error {
-			return client.Runtime.Enable(ctx)
-		},
-
-		func() error {
-			var ua string
-
-			if params.UserAgent != "" {
-				ua = common.GetUserAgent(params.UserAgent)
-			} else {
-				ua = common.GetUserAgent(drv.options.UserAgent)
 	}
 
-			logger.
+	return LoadHTMLPage(ctx, conn, params)
-				Debug().
-				Timestamp().
-				Str("user-agent", ua).
-				Msg("using User-Agent")
-
-			// do not use custom user agent
-			if ua == "" {
-				return nil
-			}
-
-			return client.Emulation.SetUserAgentOverride(
-				ctx,
-				emulation.NewSetUserAgentOverrideArgs(ua),
-			)
-		},
-
-		func() error {
-			return client.Network.Enable(ctx, network.NewEnableArgs())
-		},
-	)
-
-	if err != nil {
-		return nil, err
-	}
-
-	return LoadHTMLDocument(ctx, conn, client, params)
 }
 
 func (drv *Driver) Close() error {
-	drv.Lock()
+	drv.mu.Lock()
-	defer drv.Unlock()
+	defer drv.mu.Unlock()
 
 	if drv.session != nil {
 		drv.session.Close()
@@ -173,8 +112,8 @@ func (drv *Driver) Close() error {
 }
 
 func (drv *Driver) init(ctx context.Context) error {
-	drv.Lock()
+	drv.mu.Lock()
-	defer drv.Unlock()
+	defer drv.mu.Unlock()
 
 	if drv.session == nil {
 		ver, err := drv.dev.Version(ctx)

pkg/drivers/cdp/element.go

@@ -4,34 +4,34 @@ import (
 	"context"
 	"encoding/json"
 	"fmt"
+	"github.com/MontFerret/ferret/pkg/drivers/cdp/templates"
+	"github.com/pkg/errors"
+	"golang.org/x/net/html"
 	"hash/fnv"
 	"strconv"
 	"strings"
 	"sync"
-	"time"
 
 	"github.com/MontFerret/ferret/pkg/drivers"
 	"github.com/MontFerret/ferret/pkg/drivers/cdp/eval"
 	"github.com/MontFerret/ferret/pkg/drivers/cdp/events"
+	"github.com/MontFerret/ferret/pkg/drivers/cdp/input"
 	"github.com/MontFerret/ferret/pkg/drivers/common"
 	"github.com/MontFerret/ferret/pkg/runtime/core"
 	"github.com/MontFerret/ferret/pkg/runtime/values"
 	"github.com/MontFerret/ferret/pkg/runtime/values/types"
-	"github.com/gofrs/uuid"
+
 	"github.com/mafredri/cdp"
 	"github.com/mafredri/cdp/protocol/dom"
-	"github.com/mafredri/cdp/protocol/input"
 	"github.com/mafredri/cdp/protocol/runtime"
 	"github.com/rs/zerolog"
 )
 
 var emptyNodeID = dom.NodeID(0)
-var emptyBackendID = dom.BackendNodeID(0)
 
 type (
 	HTMLElementIdentity struct {
 		nodeID   dom.NodeID
-		backendID dom.BackendNodeID
 		objectID runtime.RemoteObjectID
 	}
 
@@ -40,40 +40,37 @@ type (
 		logger         *zerolog.Logger
 		client         *cdp.Client
 		events         *events.EventBroker
+		input          *input.Manager
+		exec           *eval.ExecutionContext
 		connected      values.Boolean
-		id             *HTMLElementIdentity
+		id             HTMLElementIdentity
-		nodeType       values.Int
+		nodeType       html.NodeType
 		nodeName       values.String
 		innerHTML      values.String
 		innerText      *common.LazyValue
 		value          core.Value
 		attributes     *common.LazyValue
 		style          *common.LazyValue
-		children       []*HTMLElementIdentity
+		children       []HTMLElementIdentity
 		loadedChildren *common.LazyValue
 	}
 )
 
-func LoadElement(
+func LoadHTMLElement(
 	ctx context.Context,
 	logger *zerolog.Logger,
 	client *cdp.Client,
 	broker *events.EventBroker,
+	input *input.Manager,
+	exec *eval.ExecutionContext,
 	nodeID dom.NodeID,
-	backendID dom.BackendNodeID,
 ) (*HTMLElement, error) {
 	if client == nil {
 		return nil, core.Error(core.ErrMissedArgument, "client")
 	}
 
 	// getting a remote object that represents the current DOM Node
-	var args *dom.ResolveNodeArgs
+	args := dom.NewResolveNodeArgs().SetNodeID(nodeID).SetExecutionContextID(exec.ID())
-
-	if backendID > 0 {
-		args = dom.NewResolveNodeArgs().SetBackendNodeID(backendID)
-	} else {
-		args = dom.NewResolveNodeArgs().SetNodeID(nodeID)
-	}
 
 	obj, err := client.DOM.ResolveNode(ctx, args)
 
@@ -85,34 +82,46 @@ func LoadElement(
 		return nil, core.Error(core.ErrNotFound, fmt.Sprintf("element %d", nodeID))
 	}
 
-	objectID := *obj.Object.ObjectID
+	id := HTMLElementIdentity{}
+	id.nodeID = nodeID
+	id.objectID = *obj.Object.ObjectID
 
+	return LoadHTMLElementWithID(
+		ctx,
+		logger,
+		client,
+		broker,
+		input,
+		exec,
+		id,
+	)
+}
+
+func LoadHTMLElementWithID(
+	ctx context.Context,
+	logger *zerolog.Logger,
+	client *cdp.Client,
+	broker *events.EventBroker,
+	input *input.Manager,
+	exec *eval.ExecutionContext,
+	id HTMLElementIdentity,
+) (*HTMLElement, error) {
 	node, err := client.DOM.DescribeNode(
 		ctx,
 		dom.
 			NewDescribeNodeArgs().
-			SetObjectID(objectID).
+			SetObjectID(id.objectID).
 			SetDepth(1),
 	)
 
 	if err != nil {
-		return nil, core.Error(err, strconv.Itoa(int(nodeID)))
+		return nil, core.Error(err, strconv.Itoa(int(id.nodeID)))
 	}
 
-	id := new(HTMLElementIdentity)
+	innerHTML, err := loadInnerHTML(ctx, client, exec, id, common.ToHTMLType(node.Node.NodeType))
-	id.nodeID = nodeID
-	id.objectID = objectID
-
-	if backendID > 0 {
-		id.backendID = backendID
-	} else {
-		id.backendID = node.Node.BackendNodeID
-	}
-
-	innerHTML, err := loadInnerHTML(ctx, client, id)
 
 	if err != nil {
-		return nil, core.Error(err, strconv.Itoa(int(nodeID)))
+		return nil, core.Error(err, strconv.Itoa(int(id.nodeID)))
 	}
 
 	var val string
@@ -125,6 +134,8 @@ func LoadElement(
 		logger,
 		client,
 		broker,
+		input,
+		exec,
 		id,
 		node.Node.NodeType,
 		node.Node.NodeName,
@@ -138,20 +149,24 @@ func NewHTMLElement(
 	logger *zerolog.Logger,
 	client *cdp.Client,
 	broker *events.EventBroker,
-	id *HTMLElementIdentity,
+	input *input.Manager,
+	exec *eval.ExecutionContext,
+	id HTMLElementIdentity,
 	nodeType int,
 	nodeName string,
 	value string,
 	innerHTML values.String,
-	children []*HTMLElementIdentity,
+	children []HTMLElementIdentity,
 ) *HTMLElement {
 	el := new(HTMLElement)
 	el.logger = logger
 	el.client = client
 	el.events = broker
+	el.input = input
+	el.exec = exec
 	el.connected = values.True
 	el.id = id
-	el.nodeType = values.NewInt(nodeType)
+	el.nodeType = common.ToHTMLType(nodeType)
 	el.nodeName = values.NewString(nodeName)
 	el.innerHTML = innerHTML
 	el.innerText = common.NewLazyValue(el.loadInnerText)
@@ -207,7 +222,7 @@ func (el *HTMLElement) MarshalJSON() ([]byte, error) {
 }
 
 func (el *HTMLElement) String() string {
-	return el.InnerHTML(context.Background()).String()
+	return el.GetInnerHTML(context.Background()).String()
 }
 
 func (el *HTMLElement) Compare(other core.Value) int64 {
@@ -217,7 +232,7 @@ func (el *HTMLElement) Compare(other core.Value) int64 {
 
 		ctx := context.Background()
 
-		return el.InnerHTML(ctx).Compare(other.InnerHTML(ctx))
+		return el.GetInnerHTML(ctx).Compare(other.GetInnerHTML(ctx))
 	default:
 		return drivers.Compare(el.Type(), other.Type())
 	}
@@ -257,11 +272,11 @@ func (el *HTMLElement) SetIn(ctx context.Context, path []core.Value, value core.
 }
 
 func (el *HTMLElement) GetValue(ctx context.Context) core.Value {
-	if !el.IsConnected() {
+	if el.IsDetached() {
 		return el.value
 	}
 
-	val, err := eval.Property(ctx, el.client, el.id.objectID, "value")
+	val, err := el.exec.ReadProperty(ctx, el.id.objectID, "value")
 
 	if err != nil {
 		el.logError(err).Msg("failed to get node value")
@@ -275,7 +290,7 @@ func (el *HTMLElement) GetValue(ctx context.Context) core.Value {
 }
 
 func (el *HTMLElement) SetValue(ctx context.Context, value core.Value) error {
-	if !el.IsConnected() {
+	if el.IsDetached() {
 		// TODO: Return an error
 		return nil
 	}
@@ -283,11 +298,11 @@ func (el *HTMLElement) SetValue(ctx context.Context, value core.Value) error {
 	return el.client.DOM.SetNodeValue(ctx, dom.NewSetNodeValueArgs(el.id.nodeID, value.String()))
 }
 
-func (el *HTMLElement) NodeType() values.Int {
+func (el *HTMLElement) GetNodeType() values.Int {
-	return el.nodeType
+	return values.NewInt(common.FromHTMLType(el.nodeType))
 }
 
-func (el *HTMLElement) NodeName() values.String {
+func (el *HTMLElement) GetNodeName() values.String {
 	return el.nodeName
 }
 
@@ -472,7 +487,7 @@ func (el *HTMLElement) GetChildNode(ctx context.Context, idx values.Int) core.Va
 }
 
 func (el *HTMLElement) QuerySelector(ctx context.Context, selector values.String) core.Value {
-	if !el.IsConnected() {
+	if el.IsDetached() {
 		return values.None
 	}
 
@@ -496,7 +511,7 @@ func (el *HTMLElement) QuerySelector(ctx context.Context, selector values.String
 		return values.None
 	}
 
-	res, err := LoadElement(ctx, el.logger, el.client, el.events, found.NodeID, emptyBackendID)
+	res, err := LoadHTMLElement(ctx, el.logger, el.client, el.events, el.input, el.exec, found.NodeID)
 
 	if err != nil {
 		el.logError(err).
@@ -510,7 +525,7 @@ func (el *HTMLElement) QuerySelector(ctx context.Context, selector values.String
 }
 
 func (el *HTMLElement) QuerySelectorAll(ctx context.Context, selector values.String) core.Value {
-	if !el.IsConnected() {
+	if el.IsDetached() {
 		return values.NewArray(0)
 	}
 
@@ -537,7 +552,7 @@ func (el *HTMLElement) QuerySelectorAll(ctx context.Context, selector values.Str
 			continue
 		}
 
-		childEl, err := LoadElement(ctx, el.logger, el.client, el.events, id, emptyBackendID)
+		childEl, err := LoadHTMLElement(ctx, el.logger, el.client, el.events, el.input, el.exec, id)
 
 		if err != nil {
 			el.logError(err).
@@ -562,7 +577,154 @@ func (el *HTMLElement) QuerySelectorAll(ctx context.Context, selector values.Str
 	return arr
 }
 
-func (el *HTMLElement) InnerText(ctx context.Context) values.String {
+func (el *HTMLElement) XPath(ctx context.Context, expression values.String) (result core.Value, err error) {
+	exp, err := expression.MarshalJSON()
+
+	if err != nil {
+		return values.None, err
+	}
+
+	out, err := el.exec.CallFunction(ctx, templates.XPath(),
+		runtime.CallArgument{
+			ObjectID: &el.id.objectID,
+		},
+		runtime.CallArgument{
+			Value: json.RawMessage(exp),
+		},
+	)
+
+	if err != nil {
+		return values.None, err
+	}
+
+	typeName := out.Type
+
+	// checking whether it's actually an array
+	if typeName == "object" {
+		isArrayRes, err := el.exec.CallFunction(ctx, `
+			(target) => Array.isArray(target)
+		`,
+			runtime.CallArgument{
+				ObjectID: out.ObjectID,
+			},
+		)
+
+		if err != nil {
+			return values.None, err
+		}
+
+		isArray, err := eval.Unmarshal(&isArrayRes)
+
+		if err != nil {
+			return values.None, err
+		}
+
+		if isArray == values.True {
+			typeName = "array"
+		}
+	}
+
+	switch typeName {
+	case "string", "number", "boolean":
+		return eval.Unmarshal(&out)
+	case "array":
+		if out.ObjectID == nil {
+			return values.None, nil
+		}
+
+		props, err := el.client.Runtime.GetProperties(ctx, runtime.NewGetPropertiesArgs(*out.ObjectID).SetOwnProperties(true))
+
+		if err != nil {
+			return values.None, err
+		}
+
+		if props.ExceptionDetails != nil {
+			exception := *props.ExceptionDetails
+
+			return values.None, errors.New(exception.Text)
+		}
+
+		result := values.NewArray(len(props.Result))
+
+		defer func() {
+			if err != nil {
+				result.ForEach(func(value core.Value, idx int) bool {
+					el, ok := value.(*HTMLElement)
+
+					if ok {
+						el.Close()
+					}
+
+					return true
+				})
+			}
+		}()
+
+		for _, descr := range props.Result {
+			if !descr.Enumerable {
+				continue
+			}
+
+			if descr.Value == nil {
+				continue
+			}
+
+			repl, err := el.client.DOM.RequestNode(ctx, dom.NewRequestNodeArgs(*descr.Value.ObjectID))
+
+			if err != nil {
+				return values.None, err
+			}
+
+			el, err := LoadHTMLElementWithID(
+				ctx,
+				el.logger,
+				el.client,
+				el.events,
+				el.input,
+				el.exec,
+				HTMLElementIdentity{
+					nodeID:   repl.NodeID,
+					objectID: *descr.Value.ObjectID,
+				},
+			)
+
+			if err != nil {
+				return values.None, err
+			}
+
+			result.Push(el)
+		}
+
+		return result, nil
+	case "object":
+		if out.ObjectID == nil {
+			return values.None, nil
+		}
+
+		repl, err := el.client.DOM.RequestNode(ctx, dom.NewRequestNodeArgs(*out.ObjectID))
+
+		if err != nil {
+			return values.None, err
+		}
+
+		return LoadHTMLElementWithID(
+			ctx,
+			el.logger,
+			el.client,
+			el.events,
+			el.input,
+			el.exec,
+			HTMLElementIdentity{
+				nodeID:   repl.NodeID,
+				objectID: *out.ObjectID,
+			},
+		)
+	default:
+		return values.None, nil
+	}
+}
+
+func (el *HTMLElement) GetInnerText(ctx context.Context) values.String {
 	val, err := el.innerText.Read(ctx)
 
 	if err != nil {
@@ -577,7 +739,7 @@ func (el *HTMLElement) InnerText(ctx context.Context) values.String {
 }
 
 func (el *HTMLElement) InnerTextBySelector(ctx context.Context, selector values.String) values.String {
-	if !el.IsConnected() {
+	if el.IsDetached() {
 		return values.EmptyString
 	}
 
@@ -624,7 +786,7 @@ func (el *HTMLElement) InnerTextBySelector(ctx context.Context, selector values.
 
 	objID := *obj.Object.ObjectID
 
-	text, err := eval.Property(ctx, el.client, objID, "innerText")
+	text, err := el.exec.ReadProperty(ctx, objID, "innerText")
 
 	if err != nil {
 		el.logError(err).
@@ -679,7 +841,7 @@ func (el *HTMLElement) InnerTextBySelectorAll(ctx context.Context, selector valu
 
 		objID := *obj.Object.ObjectID
 
-		text, err := eval.Property(ctx, el.client, objID, "innerText")
+		text, err := el.exec.ReadProperty(ctx, objID, "innerText")
 
 		if err != nil {
 			el.logError(err).
@@ -696,7 +858,7 @@ func (el *HTMLElement) InnerTextBySelectorAll(ctx context.Context, selector valu
 	return arr
 }
 
-func (el *HTMLElement) InnerHTML(_ context.Context) values.String {
+func (el *HTMLElement) GetInnerHTML(_ context.Context) values.String {
 	el.mu.Lock()
 	defer el.mu.Unlock()
 
@@ -704,7 +866,7 @@ func (el *HTMLElement) InnerHTML(_ context.Context) values.String {
 }
 
 func (el *HTMLElement) InnerHTMLBySelector(ctx context.Context, selector values.String) values.String {
-	if !el.IsConnected() {
+	if el.IsDetached() {
 		return values.EmptyString
 	}
 
@@ -719,13 +881,12 @@ func (el *HTMLElement) InnerHTMLBySelector(ctx context.Context, selector values.
 		return values.EmptyString
 	}
 
-	text, err := loadInnerHTML(ctx, el.client, &HTMLElementIdentity{
+	text, err := loadInnerHTMLByNodeID(ctx, el.client, el.exec, found.NodeID)
-		nodeID: found.NodeID,
-	})
 
 	if err != nil {
 		el.logError(err).
 			Str("selector", selector.String()).
+			Int("childNodeID", int(found.NodeID)).
 			Msg("failed to load inner HTML for found child el")
 
 		return values.EmptyString
@@ -750,13 +911,12 @@ func (el *HTMLElement) InnerHTMLBySelectorAll(ctx context.Context, selector valu
 	arr := values.NewArray(len(res.NodeIDs))
 
 	for _, id := range res.NodeIDs {
-		text, err := loadInnerHTML(ctx, el.client, &HTMLElementIdentity{
+		text, err := loadInnerHTMLByNodeID(ctx, el.client, el.exec, id)
-			nodeID: id,
-		})
 
 		if err != nil {
 			el.logError(err).
 				Str("selector", selector.String()).
+				Int("childNodeID", int(id)).
 				Msg("failed to load inner HTML for found child el")
 
 			// return what we have
@@ -770,7 +930,7 @@ func (el *HTMLElement) InnerHTMLBySelectorAll(ctx context.Context, selector valu
 }
 
 func (el *HTMLElement) CountBySelector(ctx context.Context, selector values.String) values.Int {
-	if !el.IsConnected() {
+	if el.IsDetached() {
 		return values.ZeroInt
 	}
 
@@ -790,7 +950,7 @@ func (el *HTMLElement) CountBySelector(ctx context.Context, selector values.Stri
 }
 
 func (el *HTMLElement) ExistsBySelector(ctx context.Context, selector values.String) values.Boolean {
-	if !el.IsConnected() {
+	if el.IsDetached() {
 		return values.False
 	}
 
@@ -887,183 +1047,43 @@ func (el *HTMLElement) WaitForStyle(ctx context.Context, name values.String, val
 }
 
 func (el *HTMLElement) Click(ctx context.Context) (values.Boolean, error) {
-	return events.DispatchEvent(ctx, el.client, el.id.objectID, "click")
+	if err := el.input.ClickByNodeID(ctx, el.id.nodeID); err != nil {
+		return values.False, err
+	}
+
+	return values.True, nil
 }
 
 func (el *HTMLElement) Input(ctx context.Context, value core.Value, delay values.Int) error {
-	if err := el.client.DOM.Focus(ctx, dom.NewFocusArgs().SetObjectID(el.id.objectID)); err != nil {
+	if el.GetNodeName() != "INPUT" {
-		el.logError(err).Msg("failed to focus")
+		return core.Error(core.ErrInvalidOperation, "element is not an <input> element.")
-
-		return err
 	}
 
-	delayMs := time.Duration(delay)
+	return el.input.TypeByNodeID(ctx, el.id.nodeID, value, delay)
-
-	time.Sleep(delayMs * time.Millisecond)
-
-	valStr := value.String()
-
-	for _, ch := range valStr {
-		for _, ev := range []string{"keyDown", "keyUp"} {
-			ke := input.NewDispatchKeyEventArgs(ev).SetText(string(ch))
-
-			if err := el.client.Input.DispatchKeyEvent(ctx, ke); err != nil {
-				el.logError(err).Str("value", value.String()).Msg("failed to input a value")
-
-				return err
-			}
-
-			time.Sleep(delayMs * time.Millisecond)
-		}
-	}
-
-	return nil
 }
 
 func (el *HTMLElement) Select(ctx context.Context, value *values.Array) (*values.Array, error) {
-	var attrID = "data-ferret-select"
+	return el.input.SelectByNodeID(ctx, el.id.nodeID, value)
-
-	if el.NodeName() != "SELECT" {
-		return nil, core.Error(core.ErrInvalidOperation, "element is not a <select> element.")
-	}
-
-	id, err := uuid.NewV4()
-
-	if err != nil {
-		return nil, err
-	}
-
-	err = el.client.DOM.SetAttributeValue(ctx, dom.NewSetAttributeValueArgs(el.id.nodeID, attrID, id.String()))
-
-	if err != nil {
-		return nil, err
-	}
-
-	res, err := eval.Eval(
-		ctx,
-		el.client,
-		fmt.Sprintf(`
-			var el = document.querySelector('[%s="%s"]');
-			if (el == null) {
-				return [];
-			}
-			var values = %s;
-			if (el.nodeName.toLowerCase() !== 'select') {
-				throw new Error('element is not a <select> element.');
-			}
-			var options = Array.from(el.options);
-      		el.value = undefined;
-			for (var option of options) {
-        		option.selected = values.includes(option.value);
-        	
-				if (option.selected && !el.multiple) {
-          			break;
-				}
-      		}
-      		el.dispatchEvent(new Event('input', { 'bubbles': true }));
-      		el.dispatchEvent(new Event('change', { 'bubbles': true }));
-      		
-			return options.filter(option => option.selected).map(option => option.value);
-		`,
-			attrID,
-			id.String(),
-			value.String(),
-		),
-		true,
-		false,
-	)
-
-	if err != nil {
-		return nil, err
-	}
-
-	err = el.client.DOM.RemoveAttribute(ctx, dom.NewRemoveAttributeArgs(el.id.nodeID, attrID))
-
-	if err != nil {
-		return nil, err
-	}
-
-	arr, ok := res.(*values.Array)
-
-	if ok {
-		return arr, nil
-	}
-
-	return nil, core.TypeError(types.Array, res.Type())
 }
 
 func (el *HTMLElement) ScrollIntoView(ctx context.Context) error {
-	var attrID = "data-ferret-scroll"
+	return el.input.ScrollIntoViewByNodeID(ctx, el.id.nodeID)
-
-	id, err := uuid.NewV4()
-
-	if err != nil {
-		return err
-	}
-
-	err = el.client.DOM.SetAttributeValue(ctx, dom.NewSetAttributeValueArgs(el.id.nodeID, attrID, id.String()))
-
-	if err != nil {
-		return err
-	}
-
-	_, err = eval.Eval(
-		ctx,
-		el.client,
-		fmt.Sprintf(`
-			var el = document.querySelector('[%s="%s"]');
-			if (el == null) {
-				throw new Error('element not found');
-			}
-			
-			el.scrollIntoView({
-    			behavior: 'instant',
-				inline: 'center',
-				block: 'center'
-  			});
-		`,
-			attrID,
-			id.String(),
-		), false, false)
-
-	if err != nil {
-		return err
-	}
-
-	err = el.client.DOM.RemoveAttribute(ctx, dom.NewRemoveAttributeArgs(el.id.nodeID, attrID))
-
-	return err
 }
 
 func (el *HTMLElement) Hover(ctx context.Context) error {
-	err := el.ScrollIntoView(ctx)
+	return el.input.MoveMouseByNodeID(ctx, el.id.nodeID)
-
-	if err != nil {
-		return err
 }
 
-	q, err := getClickablePoint(ctx, el.client, el.id)
+func (el *HTMLElement) IsDetached() values.Boolean {
-
-	if err != nil {
-		return err
-	}
-
-	return el.client.Input.DispatchMouseEvent(
-		ctx,
-		input.NewDispatchMouseEventArgs("mouseMoved", q.X, q.Y),
-	)
-}
-
-func (el *HTMLElement) IsConnected() values.Boolean {
 	el.mu.Lock()
 	defer el.mu.Unlock()
 
-	return el.connected
+	return !el.connected
 }
 
 func (el *HTMLElement) loadInnerText(ctx context.Context) (core.Value, error) {
-	if el.IsConnected() {
+	if !el.IsDetached() {
-		text, err := loadInnerText(ctx, el.client, el.id)
+		text, err := loadInnerText(ctx, el.client, el.exec, el.id, el.nodeType)
 
 		if err == nil {
 			return text, nil
@@ -1074,7 +1094,7 @@ func (el *HTMLElement) loadInnerText(ctx context.Context) (core.Value, error) {
 		// and just parse cached innerHTML
 	}
 
-	h := el.InnerHTML(ctx)
+	h := el.GetInnerHTML(ctx)
 
 	if h == values.EmptyString {
 		return h, nil
@@ -1102,20 +1122,21 @@ func (el *HTMLElement) loadAttrs(ctx context.Context) (core.Value, error) {
 }
 
 func (el *HTMLElement) loadChildren(ctx context.Context) (core.Value, error) {
-	if !el.IsConnected() {
+	if el.IsDetached() {
 		return values.NewArray(0), nil
 	}
 
 	loaded := values.NewArray(len(el.children))
 
 	for _, childID := range el.children {
-		child, err := LoadElement(
+		child, err := LoadHTMLElement(
 			ctx,
 			el.logger,
 			el.client,
 			el.events,
+			el.input,
+			el.exec,
 			childID.nodeID,
-			childID.backendID,
 		)
 
 		if err != nil {
@@ -1285,21 +1306,20 @@ func (el *HTMLElement) handleChildInserted(ctx context.Context, message interfac
 		return
 	}
 
-	nextIdentity := &HTMLElementIdentity{
+	nextIdentity := HTMLElementIdentity{
 		nodeID: reply.Node.NodeID,
-		backendID: reply.Node.BackendNodeID,
 	}
 
 	arr := el.children
-	el.children = append(arr[:targetIDx], append([]*HTMLElementIdentity{nextIdentity}, arr[targetIDx:]...)...)
+	el.children = append(arr[:targetIDx], append([]HTMLElementIdentity{nextIdentity}, arr[targetIDx:]...)...)
 
 	if !el.loadedChildren.Ready() {
 		return
 	}
 
-	el.loadedChildren.Write(ctx, func(v core.Value, err error) {
+	el.loadedChildren.Write(ctx, func(v core.Value, _ error) {
 		loadedArr := v.(*values.Array)
-		loadedEl, err := LoadElement(ctx, el.logger, el.client, el.events, nextID, emptyBackendID)
+		loadedEl, err := LoadHTMLElement(ctx, el.logger, el.client, el.events, el.input, el.exec, nextID)
 
 		if err != nil {
 			el.logError(err).Msg("failed to load an inserted element")
@@ -1309,7 +1329,7 @@ func (el *HTMLElement) handleChildInserted(ctx context.Context, message interfac
 
 		loadedArr.Insert(values.NewInt(targetIDx), loadedEl)
 
-		newInnerHTML, err := loadInnerHTML(ctx, el.client, el.id)
+		newInnerHTML, err := loadInnerHTML(ctx, el.client, el.exec, el.id, el.nodeType)
 
 		if err != nil {
 			el.logError(err).Msg("failed to update element")
@@ -1371,7 +1391,7 @@ func (el *HTMLElement) handleChildRemoved(ctx context.Context, message interface
 		loadedArr := v.(*values.Array)
 		loadedArr.RemoveAt(values.NewInt(targetIDx))
 
-		newInnerHTML, err := loadInnerHTML(ctx, el.client, el.id)
+		newInnerHTML, err := loadInnerHTML(ctx, el.client, el.exec, el.id, el.nodeType)
 
 		if err != nil {
 			el.logger.Error().
@@ -1393,7 +1413,6 @@ func (el *HTMLElement) logError(err error) *zerolog.Event {
 		Error().
 		Timestamp().
 		Int("nodeID", int(el.id.nodeID)).
-		Int("backendID", int(el.id.backendID)).
 		Str("objectID", string(el.id.objectID)).
 		Err(err)
 }

pkg/drivers/cdp/eval/context.go

@@ -0,0 +1,265 @@
+package eval
+
+import (
+	"context"
+	"fmt"
+
+	"github.com/mafredri/cdp"
+	"github.com/mafredri/cdp/protocol/page"
+	"github.com/mafredri/cdp/protocol/runtime"
+	"github.com/pkg/errors"
+
+	"github.com/MontFerret/ferret/pkg/runtime/core"
+	"github.com/MontFerret/ferret/pkg/runtime/values"
+)
+
+const EmptyExecutionContextID = runtime.ExecutionContextID(-1)
+
+type ExecutionContext struct {
+	client    *cdp.Client
+	frame     page.Frame
+	contextID runtime.ExecutionContextID
+}
+
+func NewExecutionContext(client *cdp.Client, frame page.Frame, contextID runtime.ExecutionContextID) *ExecutionContext {
+	ec := new(ExecutionContext)
+	ec.client = client
+	ec.frame = frame
+	ec.contextID = contextID
+
+	return ec
+}
+
+func (ec *ExecutionContext) ID() runtime.ExecutionContextID {
+	return ec.contextID
+}
+
+func (ec *ExecutionContext) Eval(ctx context.Context, exp string) error {
+	_, err := ec.evalWithValueInternal(
+		ctx,
+		runtime.
+			NewEvaluateArgs(PrepareEval(exp)),
+	)
+
+	return err
+}
+
+func (ec *ExecutionContext) EvalWithValue(ctx context.Context, exp string) (core.Value, error) {
+	return ec.evalWithValueInternal(
+		ctx,
+		runtime.
+			NewEvaluateArgs(PrepareEval(exp)).
+			SetReturnByValue(true),
+	)
+}
+
+func (ec *ExecutionContext) EvalAsync(ctx context.Context, exp string) (core.Value, error) {
+	return ec.evalWithValueInternal(
+		ctx,
+		runtime.
+			NewEvaluateArgs(PrepareEval(exp)).
+			SetReturnByValue(true).
+			SetAwaitPromise(true),
+	)
+}
+
+func (ec *ExecutionContext) ResolveRemoteObject(ctx context.Context, exp string) (runtime.RemoteObject, error) {
+	res, err := ec.evalInternal(ctx, runtime.NewEvaluateArgs(PrepareEval(exp)))
+
+	if err != nil {
+		return runtime.RemoteObject{}, err
+	}
+
+	if res.ObjectID == nil {
+		return runtime.RemoteObject{}, errors.Wrap(core.ErrUnexpected, "unable to resolve remote object")
+	}
+
+	return res, nil
+}
+
+func (ec *ExecutionContext) CallMethod(
+	ctx context.Context,
+	objectID runtime.RemoteObjectID,
+	methodName string,
+	args []runtime.CallArgument,
+) (*runtime.RemoteObject, error) {
+	callArgs := runtime.NewCallFunctionOnArgs(methodName).
+		SetObjectID(objectID).
+		SetArguments(args)
+
+	if ec.contextID != EmptyExecutionContextID {
+		callArgs.SetExecutionContextID(ec.contextID)
+	}
+
+	found, err := ec.client.Runtime.CallFunctionOn(
+		ctx,
+		callArgs,
+	)
+
+	if err != nil {
+		return nil, err
+	}
+
+	if found.ExceptionDetails != nil {
+		return nil, found.ExceptionDetails
+	}
+
+	if found.Result.ObjectID == nil {
+		return nil, nil
+	}
+
+	return &found.Result, nil
+}
+
+func (ec *ExecutionContext) ReadProperty(
+	ctx context.Context,
+	objectID runtime.RemoteObjectID,
+	propName string,
+) (core.Value, error) {
+	res, err := ec.client.Runtime.GetProperties(
+		ctx,
+		runtime.NewGetPropertiesArgs(objectID),
+	)
+
+	if err != nil {
+		return values.None, err
+	}
+
+	if res.ExceptionDetails != nil {
+		return values.None, res.ExceptionDetails
+	}
+
+	// all props
+	if propName == "" {
+		arr := values.NewArray(len(res.Result))
+
+		for _, prop := range res.Result {
+			val, err := Unmarshal(prop.Value)
+
+			if err != nil {
+				return values.None, err
+			}
+
+			arr.Push(val)
+		}
+
+		return arr, nil
+	}
+
+	for _, prop := range res.Result {
+		if prop.Name == propName {
+			return Unmarshal(prop.Value)
+		}
+	}
+
+	return values.None, nil
+}
+
+func (ec *ExecutionContext) DispatchEvent(
+	ctx context.Context,
+	objectID runtime.RemoteObjectID,
+	eventName string,
+) (values.Boolean, error) {
+	args := runtime.NewEvaluateArgs(PrepareEval(fmt.Sprintf(`
+		return new window.MouseEvent('%s', { bubbles: true, cancelable: true })
+	`, eventName)))
+
+	if ec.contextID != EmptyExecutionContextID {
+		args.SetContextID(ec.contextID)
+	}
+
+	evt, err := ec.client.Runtime.Evaluate(ctx, args)
+
+	if err != nil {
+		return values.False, nil
+	}
+
+	if evt.ExceptionDetails != nil {
+		return values.False, evt.ExceptionDetails
+	}
+
+	if evt.Result.ObjectID == nil {
+		return values.False, nil
+	}
+
+	evtID := evt.Result.ObjectID
+
+	// release the event object
+	defer ec.client.Runtime.ReleaseObject(ctx, runtime.NewReleaseObjectArgs(*evtID))
+
+	_, err = ec.CallMethod(
+		ctx,
+		objectID,
+		"dispatchEvent",
+		[]runtime.CallArgument{
+			{
+				ObjectID: evt.Result.ObjectID,
+			},
+		},
+	)
+
+	if err != nil {
+		return values.False, err
+	}
+
+	return values.True, nil
+}
+
+func (ec *ExecutionContext) CallFunction(ctx context.Context, declaration string, args ...runtime.CallArgument) (runtime.RemoteObject, error) {
+	cfArgs := runtime.NewCallFunctionOnArgs(declaration).SetArguments(args)
+
+	if ec.contextID != EmptyExecutionContextID {
+		cfArgs.SetExecutionContextID(ec.contextID)
+	}
+
+	repl, err := ec.client.Runtime.CallFunctionOn(ctx, cfArgs)
+
+	if err != nil {
+		return runtime.RemoteObject{}, err
+	}
+
+	if repl.ExceptionDetails != nil {
+		exception := *repl.ExceptionDetails
+
+		return runtime.RemoteObject{}, errors.New(exception.Error())
+	}
+
+	return repl.Result, nil
+}
+
+func (ec *ExecutionContext) evalWithValueInternal(ctx context.Context, args *runtime.EvaluateArgs) (core.Value, error) {
+	obj, err := ec.evalInternal(ctx, args)
+
+	if err != nil {
+		return values.None, err
+	}
+
+	if obj.Type != "undefined" && obj.Type != "null" {
+		return values.Unmarshal(obj.Value)
+	}
+
+	return Unmarshal(&obj)
+}
+
+func (ec *ExecutionContext) evalInternal(ctx context.Context, args *runtime.EvaluateArgs) (runtime.RemoteObject, error) {
+	if ec.contextID != EmptyExecutionContextID {
+		args.SetContextID(ec.contextID)
+	}
+
+	out, err := ec.client.Runtime.Evaluate(ctx, args)
+
+	if err != nil {
+		return runtime.RemoteObject{}, err
+	}
+
+	if out.ExceptionDetails != nil {
+		ex := out.ExceptionDetails
+
+		return runtime.RemoteObject{}, core.Error(
+			core.ErrUnexpected,
+			fmt.Sprintf("%s: %s", ex.Text, *ex.Exception.Description),
+		)
+	}
+
+	return out.Result, nil
+}

pkg/drivers/cdp/eval/eval.go

@@ -1,160 +0,0 @@
-package eval
-
-import (
-	"context"
-	"encoding/json"
-	"fmt"
-
-	"github.com/MontFerret/ferret/pkg/runtime/core"
-	"github.com/MontFerret/ferret/pkg/runtime/values"
-	"github.com/mafredri/cdp"
-	"github.com/mafredri/cdp/protocol/runtime"
-)
-
-func PrepareEval(exp string) string {
-	return fmt.Sprintf("((function () {%s})())", exp)
-}
-
-func Eval(ctx context.Context, client *cdp.Client, exp string, ret bool, async bool) (core.Value, error) {
-	args := runtime.
-		NewEvaluateArgs(PrepareEval(exp)).
-		SetReturnByValue(ret).
-		SetAwaitPromise(async)
-
-	out, err := client.Runtime.Evaluate(ctx, args)
-
-	if err != nil {
-		return values.None, err
-	}
-
-	if out.ExceptionDetails != nil {
-		ex := out.ExceptionDetails
-
-		return values.None, core.Error(
-			core.ErrUnexpected,
-			fmt.Sprintf("%s: %s", ex.Text, *ex.Exception.Description),
-		)
-	}
-
-	if out.Result.Type != "undefined" {
-		return values.Unmarshal(out.Result.Value)
-	}
-
-	return Unmarshal(&out.Result)
-}
-
-func Property(
-	ctx context.Context,
-	client *cdp.Client,
-	objectID runtime.RemoteObjectID,
-	propName string,
-) (core.Value, error) {
-	res, err := client.Runtime.GetProperties(
-		ctx,
-		runtime.NewGetPropertiesArgs(objectID),
-	)
-
-	if err != nil {
-		return values.None, err
-	}
-
-	if res.ExceptionDetails != nil {
-		return values.None, res.ExceptionDetails
-	}
-
-	// all props
-	if propName == "" {
-		var arr *values.Array
-		arr = values.NewArray(len(res.Result))
-
-		for _, prop := range res.Result {
-			val, err := Unmarshal(prop.Value)
-
-			if err != nil {
-				return values.None, err
-			}
-
-			arr.Push(val)
-		}
-
-		return arr, nil
-	}
-
-	for _, prop := range res.Result {
-		if prop.Name == propName {
-			return Unmarshal(prop.Value)
-		}
-	}
-
-	return values.None, nil
-}
-
-func Method(
-	ctx context.Context,
-	client *cdp.Client,
-	objectID runtime.RemoteObjectID,
-	methodName string,
-	args []runtime.CallArgument,
-) (*runtime.RemoteObject, error) {
-	found, err := client.Runtime.CallFunctionOn(
-		ctx,
-		runtime.NewCallFunctionOnArgs(methodName).
-			SetObjectID(objectID).
-			SetArguments(args),
-	)
-
-	if err != nil {
-		return nil, err
-	}
-
-	if found.ExceptionDetails != nil {
-		return nil, found.ExceptionDetails
-	}
-
-	if found.Result.ObjectID == nil {
-		return nil, nil
-	}
-
-	return &found.Result, nil
-}
-
-func MethodQuerySelector(
-	ctx context.Context,
-	client *cdp.Client,
-	objectID runtime.RemoteObjectID,
-	selector string,
-) (runtime.RemoteObjectID, error) {
-	bytes, err := json.Marshal(selector)
-
-	if err != nil {
-		return "", err
-	}
-
-	obj, err := Method(ctx, client, objectID, "querySelector", []runtime.CallArgument{
-		{
-			Value: json.RawMessage(bytes),
-		},
-	})
-
-	if err != nil {
-		return "", err
-	}
-
-	if obj.ObjectID == nil {
-		return "", nil
-	}
-
-	return *obj.ObjectID, nil
-}
-
-func Unmarshal(obj *runtime.RemoteObject) (core.Value, error) {
-	if obj == nil {
-		return values.None, nil
-	}
-
-	if obj.Type != "undefined" {
-		return values.Unmarshal(obj.Value)
-	}
-
-	return values.None, nil
-}

pkg/drivers/cdp/eval/helpers.go

@@ -0,0 +1,35 @@
+package eval
+
+import (
+	"fmt"
+	"strconv"
+
+	"github.com/MontFerret/ferret/pkg/runtime/core"
+	"github.com/MontFerret/ferret/pkg/runtime/values"
+	"github.com/mafredri/cdp/protocol/runtime"
+)
+
+func PrepareEval(exp string) string {
+	return fmt.Sprintf("((function () {%s})())", exp)
+}
+
+func Unmarshal(obj *runtime.RemoteObject) (core.Value, error) {
+	if obj == nil {
+		return values.None, nil
+	}
+
+	switch obj.Type {
+	case "string":
+		str, err := strconv.Unquote(string(obj.Value))
+
+		if err != nil {
+			return values.None, err
+		}
+
+		return values.NewString(str), nil
+	case "undefined", "null":
+		return values.None, nil
+	default:
+		return values.Unmarshal(obj.Value)
+	}
+}

pkg/drivers/cdp/eval/param.go

@@ -1,9 +1,10 @@
 package eval
 
 import (
+	"strconv"
+
 	"github.com/MontFerret/ferret/pkg/runtime/core"
 	"github.com/MontFerret/ferret/pkg/runtime/values"
-	"strconv"
 )
 
 func Param(input core.Value) string {

pkg/drivers/cdp/events/broker.go

@@ -5,11 +5,11 @@ import (
 	"reflect"
 	"sync"
 
-	"github.com/MontFerret/ferret/pkg/drivers"
-
-	"github.com/MontFerret/ferret/pkg/runtime/core"
 	"github.com/mafredri/cdp/protocol/dom"
 	"github.com/mafredri/cdp/protocol/page"
+
+	"github.com/MontFerret/ferret/pkg/drivers"
+	"github.com/MontFerret/ferret/pkg/runtime/core"
 )
 
 type (
@@ -179,6 +179,16 @@ func (broker *EventBroker) Close() error {
 	return nil
 }
 
+func (broker *EventBroker) StopAndClose() error {
+	err := broker.Stop()
+
+	if err != nil {
+		return err
+	}
+
+	return broker.Close()
+}
+
 func (broker *EventBroker) runLoop(ctx context.Context) {
 	for {
 		select {
@@ -265,6 +275,7 @@ func (broker *EventBroker) emit(ctx context.Context, event Event, message interf
 	listeners, ok := broker.listeners[event]
 
 	if !ok {
+		broker.mu.Unlock()
 		return
 	}
 

pkg/drivers/cdp/events/broker_test.go

@@ -269,7 +269,7 @@ func TestEventBroker(t *testing.T) {
 			var listener events.EventListener
 
 			listener = func(ctx context.Context, message interface{}) {
-				counter += 1
+				counter++
 
 				b.RemoveEventListener(events.EventLoad, listener)
 			}

pkg/drivers/cdp/events/dispatch.go

@@ -1,56 +0,0 @@
-package events
-
-import (
-	"context"
-	"fmt"
-	"github.com/MontFerret/ferret/pkg/drivers/cdp/eval"
-	"github.com/MontFerret/ferret/pkg/runtime/values"
-	"github.com/mafredri/cdp"
-	"github.com/mafredri/cdp/protocol/runtime"
-)
-
-func DispatchEvent(
-	ctx context.Context,
-	client *cdp.Client,
-	objectID runtime.RemoteObjectID,
-	eventName string,
-) (values.Boolean, error) {
-	evt, err := client.Runtime.Evaluate(ctx, runtime.NewEvaluateArgs(eval.PrepareEval(fmt.Sprintf(`
-		return new window.MouseEvent('%s', { bubbles: true, cancelable: true })
-	`, eventName))))
-
-	if err != nil {
-		return values.False, nil
-	}
-
-	if evt.ExceptionDetails != nil {
-		return values.False, evt.ExceptionDetails
-	}
-
-	if evt.Result.ObjectID == nil {
-		return values.False, nil
-	}
-
-	evtID := evt.Result.ObjectID
-
-	// release the event object
-	defer client.Runtime.ReleaseObject(ctx, runtime.NewReleaseObjectArgs(*evtID))
-
-	_, err = eval.Method(
-		ctx,
-		client,
-		objectID,
-		"dispatchEvent",
-		[]runtime.CallArgument{
-			{
-				ObjectID: evt.Result.ObjectID,
-			},
-		},
-	)
-
-	if err != nil {
-		return values.False, err
-	}
-
-	return values.True, nil
-}

pkg/drivers/cdp/events/helpers.go

@@ -0,0 +1,126 @@
+package events
+
+import (
+	"context"
+
+	"github.com/mafredri/cdp"
+	"github.com/mafredri/cdp/protocol/dom"
+	"github.com/mafredri/cdp/protocol/page"
+	"github.com/pkg/errors"
+)
+
+func WaitForLoadEvent(ctx context.Context, client *cdp.Client) error {
+	loadEventFired, err := client.Page.LoadEventFired(ctx)
+
+	if err != nil {
+		return errors.Wrap(err, "failed to create load event hook")
+	}
+
+	_, err = loadEventFired.Recv()
+
+	if err != nil {
+		return err
+	}
+
+	return loadEventFired.Close()
+}
+
+func CreateEventBroker(client *cdp.Client) (*EventBroker, error) {
+	var err error
+	var onLoad page.LoadEventFiredClient
+	var onReload dom.DocumentUpdatedClient
+	var onAttrModified dom.AttributeModifiedClient
+	var onAttrRemoved dom.AttributeRemovedClient
+	var onChildCountUpdated dom.ChildNodeCountUpdatedClient
+	var onChildNodeInserted dom.ChildNodeInsertedClient
+	var onChildNodeRemoved dom.ChildNodeRemovedClient
+	ctx := context.Background()
+
+	onLoad, err = client.Page.LoadEventFired(ctx)
+
+	if err != nil {
+		return nil, err
+	}
+
+	onReload, err = client.DOM.DocumentUpdated(ctx)
+
+	if err != nil {
+		onLoad.Close()
+		return nil, err
+	}
+
+	onAttrModified, err = client.DOM.AttributeModified(ctx)
+
+	if err != nil {
+		onLoad.Close()
+		onReload.Close()
+		return nil, err
+	}
+
+	onAttrRemoved, err = client.DOM.AttributeRemoved(ctx)
+
+	if err != nil {
+		onLoad.Close()
+		onReload.Close()
+		onAttrModified.Close()
+		return nil, err
+	}
+
+	onChildCountUpdated, err = client.DOM.ChildNodeCountUpdated(ctx)
+
+	if err != nil {
+		onLoad.Close()
+		onReload.Close()
+		onAttrModified.Close()
+		onAttrRemoved.Close()
+		return nil, err
+	}
+
+	onChildNodeInserted, err = client.DOM.ChildNodeInserted(ctx)
+
+	if err != nil {
+		onLoad.Close()
+		onReload.Close()
+		onAttrModified.Close()
+		onAttrRemoved.Close()
+		onChildCountUpdated.Close()
+		return nil, err
+	}
+
+	onChildNodeRemoved, err = client.DOM.ChildNodeRemoved(ctx)
+
+	if err != nil {
+		onLoad.Close()
+		onReload.Close()
+		onAttrModified.Close()
+		onAttrRemoved.Close()
+		onChildCountUpdated.Close()
+		onChildNodeInserted.Close()
+		return nil, err
+	}
+
+	broker := NewEventBroker(
+		onLoad,
+		onReload,
+		onAttrModified,
+		onAttrRemoved,
+		onChildCountUpdated,
+		onChildNodeInserted,
+		onChildNodeRemoved,
+	)
+
+	err = broker.Start()
+
+	if err != nil {
+		onLoad.Close()
+		onReload.Close()
+		onAttrModified.Close()
+		onAttrRemoved.Close()
+		onChildCountUpdated.Close()
+		onChildNodeInserted.Close()
+		onChildNodeRemoved.Close()
+		return nil, err
+	}
+
+	return broker, nil
+}

pkg/drivers/cdp/events/wait.go

@@ -2,12 +2,12 @@ package events
 
 import (
 	"context"
+	"time"
+
 	"github.com/MontFerret/ferret/pkg/drivers"
 	"github.com/MontFerret/ferret/pkg/drivers/cdp/eval"
 	"github.com/MontFerret/ferret/pkg/runtime/core"
 	"github.com/MontFerret/ferret/pkg/runtime/values"
-	"github.com/mafredri/cdp"
-	"time"
 )
 
 type (
@@ -58,18 +58,15 @@ func (task *WaitTask) Run(ctx context.Context) (core.Value, error) {
 }
 
 func NewEvalWaitTask(
-	client *cdp.Client,
+	ec *eval.ExecutionContext,
 	predicate string,
 	polling time.Duration,
 ) *WaitTask {
 	return NewWaitTask(
 		func(ctx context.Context) (core.Value, error) {
-			return eval.Eval(
+			return ec.EvalWithValue(
 				ctx,
-				client,
 				predicate,
-				true,
-				false,
 			)
 		},
 		polling,

pkg/drivers/cdp/helpers.go

@@ -4,16 +4,15 @@ import (
 	"bytes"
 	"context"
 	"errors"
-	"math"
+	"golang.org/x/net/html"
 	"strings"
 	"time"
 
 	"github.com/MontFerret/ferret/pkg/drivers"
 	"github.com/MontFerret/ferret/pkg/drivers/cdp/eval"
-	"github.com/MontFerret/ferret/pkg/drivers/cdp/events"
 	"github.com/MontFerret/ferret/pkg/drivers/common"
-	"github.com/MontFerret/ferret/pkg/runtime/core"
 	"github.com/MontFerret/ferret/pkg/runtime/values"
+
 	"github.com/PuerkitoBio/goquery"
 	"github.com/mafredri/cdp"
 	"github.com/mafredri/cdp/protocol/dom"
@@ -27,11 +26,6 @@ var emptyExpires = time.Time{}
 
 type (
 	batchFunc = func() error
-
-	Quad struct {
-		X float64
-		Y float64
-	}
 )
 
 func runBatch(funcs ...batchFunc) error {
@@ -44,101 +38,6 @@ func runBatch(funcs ...batchFunc) error {
 	return eg.Wait()
 }
 
-func getRootElement(ctx context.Context, client *cdp.Client) (*dom.GetDocumentReply, error) {
-	d, err := client.DOM.GetDocument(ctx, dom.NewGetDocumentArgs().SetDepth(1))
-
-	if err != nil {
-		return nil, err
-	}
-
-	return d, nil
-}
-
-func fromProtocolQuad(quad dom.Quad) []Quad {
-	return []Quad{
-		{
-			X: quad[0],
-			Y: quad[1],
-		},
-		{
-			X: quad[2],
-			Y: quad[3],
-		},
-		{
-			X: quad[4],
-			Y: quad[5],
-		},
-		{
-			X: quad[6],
-			Y: quad[7],
-		},
-	}
-}
-
-func computeQuadArea(quads []Quad) float64 {
-	var area float64
-
-	for i := range quads {
-		p1 := quads[i]
-		p2 := quads[(i+1)%len(quads)]
-		area += (p1.X*p2.Y - p2.X*p1.Y) / 2
-	}
-
-	return math.Abs(area)
-}
-
-func getClickablePoint(ctx context.Context, client *cdp.Client, id *HTMLElementIdentity) (Quad, error) {
-	qargs := dom.NewGetContentQuadsArgs()
-
-	switch {
-	case id.objectID != "":
-		qargs.SetObjectID(id.objectID)
-	case id.backendID != 0:
-		qargs.SetBackendNodeID(id.backendID)
-	default:
-		qargs.SetNodeID(id.nodeID)
-	}
-
-	res, err := client.DOM.GetContentQuads(ctx, qargs)
-
-	if err != nil {
-		return Quad{}, err
-	}
-
-	if res.Quads == nil || len(res.Quads) == 0 {
-		return Quad{}, errors.New("node is either not visible or not an HTMLElement")
-	}
-
-	quads := make([][]Quad, 0, len(res.Quads))
-
-	for _, q := range res.Quads {
-		quad := fromProtocolQuad(q)
-
-		if computeQuadArea(quad) > 1 {
-			quads = append(quads, quad)
-		}
-	}
-
-	if len(quads) == 0 {
-		return Quad{}, errors.New("node is either not visible or not an HTMLElement")
-	}
-
-	// Return the middle point of the first quad.
-	quad := quads[0]
-	var x float64
-	var y float64
-
-	for _, q := range quad {
-		x += q.X
-		y += q.Y
-	}
-
-	return Quad{
-		X: x / 4,
-		Y: y / 4,
-	}, nil
-}
-
 func parseAttrs(attrs []string) *values.Object {
 	var attr values.String
 
@@ -167,25 +66,14 @@ func parseAttrs(attrs []string) *values.Object {
 	return res
 }
 
-func loadInnerHTML(ctx context.Context, client *cdp.Client, id *HTMLElementIdentity) (values.String, error) {
+func loadInnerHTML(ctx context.Context, client *cdp.Client, exec *eval.ExecutionContext, id HTMLElementIdentity, nodeType html.NodeType) (values.String, error) {
+	// not a document
+	if nodeType != html.DocumentNode {
 		var objID runtime.RemoteObjectID
 
-	switch {
+		if id.objectID != "" {
-	case id.objectID != "":
 			objID = id.objectID
-	case id.backendID > 0:
+		} else {
-		repl, err := client.DOM.ResolveNode(ctx, dom.NewResolveNodeArgs().SetBackendNodeID(id.backendID))
-
-		if err != nil {
-			return "", err
-		}
-
-		if repl.Object.ObjectID == nil {
-			return "", errors.New("unable to resolve node")
-		}
-
-		objID = *repl.Object.ObjectID
-	default:
 			repl, err := client.DOM.ResolveNode(ctx, dom.NewResolveNodeArgs().SetNodeID(id.nodeID))
 
 			if err != nil {
@@ -199,45 +87,44 @@ func loadInnerHTML(ctx context.Context, client *cdp.Client, id *HTMLElementIdent
 			objID = *repl.Object.ObjectID
 		}
 
+		res, err := exec.ReadProperty(ctx, objID, "innerHTML")
+
+		if err != nil {
+			return "", err
+		}
+
+		return values.NewString(res.String()), nil
+	}
+
+	repl, err := exec.EvalWithValue(ctx, "return document.documentElement.innerHTML")
+
+	if err != nil {
+		return "", err
+	}
+
+	return values.NewString(repl.String()), nil
+}
+
+func loadInnerHTMLByNodeID(ctx context.Context, client *cdp.Client, exec *eval.ExecutionContext, nodeID dom.NodeID) (values.String, error) {
+	node, err := client.DOM.DescribeNode(ctx, dom.NewDescribeNodeArgs().SetNodeID(nodeID))
+
+	if err != nil {
+		return values.EmptyString, err
+	}
+
+	return loadInnerHTML(ctx, client, exec, HTMLElementIdentity{
+		nodeID: nodeID,
+	}, common.ToHTMLType(node.Node.NodeType))
+}
+
+func loadInnerText(ctx context.Context, client *cdp.Client, exec *eval.ExecutionContext, id HTMLElementIdentity, nodeType html.NodeType) (values.String, error) {
 	// not a document
-	if id.nodeID != 1 {
+	if nodeType != html.DocumentNode {
-		res, err := eval.Property(ctx, client, objID, "innerHTML")
-
-		if err != nil {
-			return "", err
-		}
-
-		return values.NewString(res.String()), err
-	}
-
-	repl, err := client.DOM.GetOuterHTML(ctx, dom.NewGetOuterHTMLArgs().SetObjectID(objID))
-
-	if err != nil {
-		return "", err
-	}
-
-	return values.NewString(repl.OuterHTML), nil
-}
-
-func loadInnerText(ctx context.Context, client *cdp.Client, id *HTMLElementIdentity) (values.String, error) {
 		var objID runtime.RemoteObjectID
 
-	switch {
+		if id.objectID != "" {
-	case id.objectID != "":
 			objID = id.objectID
-	case id.backendID > 0:
+		} else {
-		repl, err := client.DOM.ResolveNode(ctx, dom.NewResolveNodeArgs().SetBackendNodeID(id.backendID))
-
-		if err != nil {
-			return "", err
-		}
-
-		if repl.Object.ObjectID == nil {
-			return "", errors.New("unable to resolve node")
-		}
-
-		objID = *repl.Object.ObjectID
-	default:
 			repl, err := client.DOM.ResolveNode(ctx, dom.NewResolveNodeArgs().SetNodeID(id.nodeID))
 
 			if err != nil {
@@ -251,9 +138,7 @@ func loadInnerText(ctx context.Context, client *cdp.Client, id *HTMLElementIdent
 			objID = *repl.Object.ObjectID
 		}
 
-	// not a document
+		res, err := exec.ReadProperty(ctx, objID, "innerText")
-	if id.nodeID != 1 {
-		res, err := eval.Property(ctx, client, objID, "innerText")
 
 		if err != nil {
 			return "", err
@@ -262,15 +147,27 @@ func loadInnerText(ctx context.Context, client *cdp.Client, id *HTMLElementIdent
 		return values.NewString(res.String()), err
 	}
 
-	repl, err := client.DOM.GetOuterHTML(ctx, dom.NewGetOuterHTMLArgs().SetObjectID(objID))
+	repl, err := exec.EvalWithValue(ctx, "return document.documentElement.innerText")
 
 	if err != nil {
 		return "", err
 	}
 
-	return parseInnerText(repl.OuterHTML)
+	return values.NewString(repl.String()), nil
 }
 
+//func loadInnerTextByNodeID(ctx context.Context, client *cdp.Client, exec *eval.ExecutionContext, nodeID dom.NodeID) (values.String, error) {
+//	node, err := client.DOM.DescribeNode(ctx, dom.NewDescribeNodeArgs().SetNodeID(nodeID))
+//
+//	if err != nil {
+//		return values.EmptyString, err
+//	}
+//
+//	return loadInnerText(ctx, client, exec, HTMLElementIdentity{
+//		nodeID: nodeID,
+//	}, common.ToHTMLType(node.Node.NodeType))
+//}
+
 func parseInnerText(innerHTML string) (values.String, error) {
 	buff := bytes.NewBuffer([]byte(innerHTML))
 
@@ -283,135 +180,19 @@ func parseInnerText(innerHTML string) (values.String, error) {
 	return values.NewString(parsed.Text()), nil
 }
 
-func createChildrenArray(nodes []dom.Node) []*HTMLElementIdentity {
+func createChildrenArray(nodes []dom.Node) []HTMLElementIdentity {
-	children := make([]*HTMLElementIdentity, len(nodes))
+	children := make([]HTMLElementIdentity, len(nodes))
 
 	for idx, child := range nodes {
-		children[idx] = &HTMLElementIdentity{
+		child := child
+		children[idx] = HTMLElementIdentity{
 			nodeID: child.NodeID,
-			backendID: child.BackendNodeID,
 		}
 	}
 
 	return children
 }
 
-func waitForLoadEvent(ctx context.Context, client *cdp.Client) error {
-	loadEventFired, err := client.Page.LoadEventFired(ctx)
-
-	if err != nil {
-		return err
-	}
-
-	_, err = loadEventFired.Recv()
-
-	if err != nil {
-		return err
-	}
-
-	return loadEventFired.Close()
-}
-
-func createEventBroker(client *cdp.Client) (*events.EventBroker, error) {
-	var err error
-	var onLoad page.LoadEventFiredClient
-	var onReload dom.DocumentUpdatedClient
-	var onAttrModified dom.AttributeModifiedClient
-	var onAttrRemoved dom.AttributeRemovedClient
-	var onChildCountUpdated dom.ChildNodeCountUpdatedClient
-	var onChildNodeInserted dom.ChildNodeInsertedClient
-	var onChildNodeRemoved dom.ChildNodeRemovedClient
-	ctx := context.Background()
-
-	onLoad, err = client.Page.LoadEventFired(ctx)
-
-	if err != nil {
-		return nil, err
-	}
-
-	onReload, err = client.DOM.DocumentUpdated(ctx)
-
-	if err != nil {
-		onLoad.Close()
-		return nil, err
-	}
-
-	onAttrModified, err = client.DOM.AttributeModified(ctx)
-
-	if err != nil {
-		onLoad.Close()
-		onReload.Close()
-		return nil, err
-	}
-
-	onAttrRemoved, err = client.DOM.AttributeRemoved(ctx)
-
-	if err != nil {
-		onLoad.Close()
-		onReload.Close()
-		onAttrModified.Close()
-		return nil, err
-	}
-
-	onChildCountUpdated, err = client.DOM.ChildNodeCountUpdated(ctx)
-
-	if err != nil {
-		onLoad.Close()
-		onReload.Close()
-		onAttrModified.Close()
-		onAttrRemoved.Close()
-		return nil, err
-	}
-
-	onChildNodeInserted, err = client.DOM.ChildNodeInserted(ctx)
-
-	if err != nil {
-		onLoad.Close()
-		onReload.Close()
-		onAttrModified.Close()
-		onAttrRemoved.Close()
-		onChildCountUpdated.Close()
-		return nil, err
-	}
-
-	onChildNodeRemoved, err = client.DOM.ChildNodeRemoved(ctx)
-
-	if err != nil {
-		onLoad.Close()
-		onReload.Close()
-		onAttrModified.Close()
-		onAttrRemoved.Close()
-		onChildCountUpdated.Close()
-		onChildNodeInserted.Close()
-		return nil, err
-	}
-
-	broker := events.NewEventBroker(
-		onLoad,
-		onReload,
-		onAttrModified,
-		onAttrRemoved,
-		onChildCountUpdated,
-		onChildNodeInserted,
-		onChildNodeRemoved,
-	)
-
-	err = broker.Start()
-
-	if err != nil {
-		onLoad.Close()
-		onReload.Close()
-		onAttrModified.Close()
-		onAttrRemoved.Close()
-		onChildCountUpdated.Close()
-		onChildNodeInserted.Close()
-		onChildNodeRemoved.Close()
-		return nil, err
-	}
-
-	return broker, nil
-}
-
 func fromDriverCookie(url string, cookie drivers.HTTPCookie) network.CookieParam {
 	sameSite := network.CookieSameSiteNotSet
 
@@ -485,9 +266,58 @@ func normalizeCookieURL(url string) string {
 	return httpPrefix + url
 }
 
-func randomDuration(delay values.Int) time.Duration {
+func resolveFrame(ctx context.Context, client *cdp.Client, frame page.Frame) (dom.Node, runtime.ExecutionContextID, error) {
-	max, min := core.NumberBoundaries(float64(int64(delay)))
+	worldRepl, err := client.Page.CreateIsolatedWorld(ctx, page.NewCreateIsolatedWorldArgs(frame.ID))
-	value := core.Random(max, min)
 
-	return time.Duration(int64(value))
+	if err != nil {
+		return dom.Node{}, -1, err
+	}
+
+	evalRes, err := client.Runtime.Evaluate(
+		ctx,
+		runtime.NewEvaluateArgs(eval.PrepareEval("return document")).
+			SetContextID(worldRepl.ExecutionContextID),
+	)
+
+	if err != nil {
+		return dom.Node{}, -1, err
+	}
+
+	if evalRes.ExceptionDetails != nil {
+		exception := *evalRes.ExceptionDetails
+
+		return dom.Node{}, -1, errors.New(exception.Text)
+	}
+
+	if evalRes.Result.ObjectID == nil {
+		return dom.Node{}, -1, errors.New("failed to resolve frame document")
+	}
+
+	req, err := client.DOM.RequestNode(ctx, dom.NewRequestNodeArgs(*evalRes.Result.ObjectID))
+
+	if err != nil {
+		return dom.Node{}, -1, err
+	}
+
+	if req.NodeID == 0 {
+		return dom.Node{}, -1, errors.New("framed document is resolved with empty node id")
+	}
+
+	desc, err := client.DOM.DescribeNode(
+		ctx,
+		dom.
+			NewDescribeNodeArgs().
+			SetNodeID(req.NodeID).
+			SetDepth(1),
+	)
+
+	if err != nil {
+		return dom.Node{}, -1, err
+	}
+
+	// Returned node, by some reason, does not contain the NodeID
+	// So, we have to set it manually
+	desc.Node.NodeID = req.NodeID
+
+	return desc.Node, worldRepl.ExecutionContextID, nil
 }

pkg/drivers/cdp/input/helpers.go

@@ -0,0 +1,14 @@
+package input
+
+import (
+	"time"
+
+	"github.com/MontFerret/ferret/pkg/runtime/core"
+)
+
+func randomDuration(delay int) time.Duration {
+	max, min := core.NumberBoundaries(float64(delay))
+	value := core.Random(max, min)
+
+	return time.Duration(int64(value))
+}

pkg/drivers/cdp/input/keyboard.go

@@ -0,0 +1,52 @@
+package input
+
+import (
+	"context"
+	"time"
+
+	"github.com/mafredri/cdp"
+	"github.com/mafredri/cdp/protocol/input"
+)
+
+type Keyboard struct {
+	client *cdp.Client
+}
+
+func NewKeyboard(client *cdp.Client) *Keyboard {
+	return &Keyboard{client}
+}
+
+func (k *Keyboard) Down(ctx context.Context, char string) error {
+	return k.client.Input.DispatchKeyEvent(
+		ctx,
+		input.NewDispatchKeyEventArgs("keyDown").
+			SetText(char),
+	)
+}
+
+func (k *Keyboard) Up(ctx context.Context, char string) error {
+	return k.client.Input.DispatchKeyEvent(
+		ctx,
+		input.NewDispatchKeyEventArgs("keyUp").
+			SetText(char),
+	)
+}
+
+func (k *Keyboard) Type(ctx context.Context, text string, delay int) error {
+	for _, ch := range text {
+		ch := string(ch)
+
+		if err := k.Down(ctx, ch); err != nil {
+			return err
+		}
+
+		releaseDelay := randomDuration(delay)
+		time.Sleep(releaseDelay)
+
+		if err := k.Up(ctx, ch); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}

pkg/drivers/cdp/input/manager.go

@@ -0,0 +1,305 @@
+package input
+
+import (
+	"context"
+	"fmt"
+	"time"
+
+	"github.com/gofrs/uuid"
+	"github.com/mafredri/cdp"
+	"github.com/mafredri/cdp/protocol/dom"
+
+	"github.com/MontFerret/ferret/pkg/drivers/cdp/eval"
+	"github.com/MontFerret/ferret/pkg/runtime/core"
+	"github.com/MontFerret/ferret/pkg/runtime/values"
+	"github.com/MontFerret/ferret/pkg/runtime/values/types"
+)
+
+type Manager struct {
+	client   *cdp.Client
+	exec     *eval.ExecutionContext
+	keyboard *Keyboard
+	mouse    *Mouse
+}
+
+func NewManager(
+	client *cdp.Client,
+	exec *eval.ExecutionContext,
+	keyboard *Keyboard,
+	mouse *Mouse,
+) *Manager {
+	return &Manager{
+		client,
+		exec,
+		keyboard,
+		mouse,
+	}
+}
+
+func (m *Manager) Keyboard() *Keyboard {
+	return m.keyboard
+}
+
+func (m *Manager) Mouse() *Mouse {
+	return m.mouse
+}
+
+func (m *Manager) Scroll(ctx context.Context, x, y values.Float) error {
+	return m.exec.Eval(ctx, fmt.Sprintf(`
+		window.scrollBy({
+  			top: %s,
+  			left: %s,
+  			behavior: 'instant'
+		});
+	`,
+		eval.ParamFloat(float64(x)),
+		eval.ParamFloat(float64(y)),
+	))
+}
+
+func (m *Manager) ScrollIntoViewBySelector(ctx context.Context, selector values.String) error {
+	return m.exec.Eval(ctx, fmt.Sprintf(`
+		var el = document.querySelector(%s);
+
+		if (el == null) {
+			throw new Error("element not found");
+		}
+
+		el.scrollIntoView({
+    		behavior: 'instant'
+  		});
+
+		return true;
+	`, eval.ParamString(selector.String()),
+	))
+}
+
+func (m *Manager) ScrollIntoViewByNodeID(ctx context.Context, nodeID dom.NodeID) error {
+	var attrID = "data-ferret-scroll"
+
+	id, err := uuid.NewV4()
+
+	if err != nil {
+		return err
+	}
+
+	err = m.client.DOM.SetAttributeValue(ctx, dom.NewSetAttributeValueArgs(nodeID, attrID, id.String()))
+
+	if err != nil {
+		return err
+	}
+
+	err = m.exec.Eval(
+		ctx,
+		fmt.Sprintf(`
+			var el = document.querySelector('[%s="%s"]');
+			if (el == null) {
+				throw new Error('element not found');
+			}
+			
+			el.scrollIntoView({
+    			behavior: 'instant',
+				inline: 'center',
+				block: 'center'
+  			});
+		`,
+			attrID,
+			id.String(),
+		))
+
+	if err != nil {
+		return err
+	}
+
+	err = m.client.DOM.RemoveAttribute(ctx, dom.NewRemoveAttributeArgs(nodeID, attrID))
+
+	return err
+}
+
+func (m *Manager) ScrollTop(ctx context.Context) error {
+	return m.exec.Eval(ctx, `
+		window.scrollTo({
+			left: 0,
+			top: 0,
+    		behavior: 'instant'
+  		});
+	`)
+}
+
+func (m *Manager) ScrollBottom(ctx context.Context) error {
+	return m.exec.Eval(ctx, `
+		window.scrollTo({
+			left: 0,
+			top: window.document.body.scrollHeight,
+    		behavior: 'instant'
+  		});
+	`)
+}
+
+func (m *Manager) MoveMouseBySelector(ctx context.Context, parentNodeID dom.NodeID, selector values.String) error {
+	found, err := m.client.DOM.QuerySelector(ctx, dom.NewQuerySelectorArgs(parentNodeID, selector.String()))
+
+	if err != nil {
+		return err
+	}
+
+	return m.MoveMouseByNodeID(ctx, found.NodeID)
+}
+
+func (m *Manager) MoveMouseByNodeID(ctx context.Context, nodeID dom.NodeID) error {
+	err := m.ScrollIntoViewByNodeID(ctx, nodeID)
+
+	if err != nil {
+		return err
+	}
+
+	q, err := GetClickablePointByNodeID(ctx, m.client, nodeID)
+
+	if err != nil {
+		return err
+	}
+
+	return m.mouse.Move(ctx, q.X, q.Y)
+}
+
+func (m *Manager) MoveMouse(ctx context.Context, x, y values.Float) error {
+	return m.mouse.Move(ctx, float64(x), float64(y))
+}
+
+func (m *Manager) ClickBySelector(ctx context.Context, parentNodeID dom.NodeID, selector values.String) error {
+	found, err := m.client.DOM.QuerySelector(ctx, dom.NewQuerySelectorArgs(parentNodeID, selector.String()))
+
+	if err != nil {
+		return err
+	}
+
+	return m.ClickByNodeID(ctx, found.NodeID)
+}
+
+func (m *Manager) ClickByNodeID(ctx context.Context, nodeID dom.NodeID) error {
+	if err := m.ScrollIntoViewByNodeID(ctx, nodeID); err != nil {
+		return err
+	}
+
+	points, err := GetClickablePointByNodeID(ctx, m.client, nodeID)
+
+	if err != nil {
+		return err
+	}
+
+	if err := m.mouse.Click(ctx, points.X, points.Y, 50); err != nil {
+		return nil
+	}
+
+	return nil
+}
+
+func (m *Manager) TypeBySelector(ctx context.Context, parentNodeID dom.NodeID, selector values.String, text core.Value, delay values.Int) error {
+	found, err := m.client.DOM.QuerySelector(ctx, dom.NewQuerySelectorArgs(parentNodeID, selector.String()))
+
+	if err != nil {
+		return err
+	}
+
+	return m.TypeByNodeID(ctx, found.NodeID, text, delay)
+}
+
+func (m *Manager) TypeByNodeID(ctx context.Context, nodeID dom.NodeID, text core.Value, delay values.Int) error {
+	if err := m.ScrollIntoViewByNodeID(ctx, nodeID); err != nil {
+		return err
+	}
+
+	if err := m.client.DOM.Focus(ctx, dom.NewFocusArgs().SetNodeID(nodeID)); err != nil {
+		return err
+	}
+
+	_, min := core.NumberBoundaries(float64(delay))
+	beforeTypeDelay := time.Duration(min)
+
+	time.Sleep(beforeTypeDelay * time.Millisecond)
+
+	return m.keyboard.Type(ctx, text.String(), int(delay))
+}
+
+func (m *Manager) SelectBySelector(ctx context.Context, parentNodeID dom.NodeID, selector values.String, value *values.Array) (*values.Array, error) {
+	found, err := m.client.DOM.QuerySelector(ctx, dom.NewQuerySelectorArgs(parentNodeID, selector.String()))
+
+	if err != nil {
+		return nil, err
+	}
+
+	return m.SelectByNodeID(ctx, found.NodeID, value)
+}
+
+func (m *Manager) SelectByNodeID(ctx context.Context, nodeID dom.NodeID, value *values.Array) (*values.Array, error) {
+	if err := m.ScrollIntoViewByNodeID(ctx, nodeID); err != nil {
+		return nil, err
+	}
+
+	if err := m.client.DOM.Focus(ctx, dom.NewFocusArgs().SetNodeID(nodeID)); err != nil {
+		return nil, err
+	}
+
+	var attrID = "data-ferret-select"
+
+	id, err := uuid.NewV4()
+
+	if err != nil {
+		return nil, err
+	}
+
+	err = m.client.DOM.SetAttributeValue(ctx, dom.NewSetAttributeValueArgs(nodeID, attrID, id.String()))
+
+	if err != nil {
+		return nil, err
+	}
+
+	res, err := m.exec.EvalWithValue(
+		ctx,
+		fmt.Sprintf(`
+			var el = document.querySelector('[%s="%s"]');
+			if (el == null) {
+				return [];
+			}
+			var values = %s;
+			if (el.nodeName.toLowerCase() !== 'select') {
+				throw new Error('element is not a <select> element.');
+			}
+			var options = Array.from(el.options);
+      		el.value = undefined;
+			for (var option of options) {
+        		option.selected = values.includes(option.value);
+        	
+				if (option.selected && !el.multiple) {
+          			break;
+				}
+      		}
+      		el.dispatchEvent(new Event('input', { 'bubbles': true }));
+      		el.dispatchEvent(new Event('change', { 'bubbles': true }));
+      		
+			return options.filter(option => option.selected).map(option => option.value);
+		`,
+			attrID,
+			id.String(),
+			value.String(),
+		),
+	)
+
+	if err != nil {
+		return nil, err
+	}
+
+	err = m.client.DOM.RemoveAttribute(ctx, dom.NewRemoveAttributeArgs(nodeID, attrID))
+
+	if err != nil {
+		return nil, err
+	}
+
+	arr, ok := res.(*values.Array)
+
+	if ok {
+		return arr, nil
+	}
+
+	return nil, core.TypeError(types.Array, res.Type())
+}

pkg/drivers/cdp/input/mouse.go

@@ -0,0 +1,83 @@
+package input
+
+import (
+	"context"
+	"time"
+
+	"github.com/mafredri/cdp"
+	"github.com/mafredri/cdp/protocol/input"
+)
+
+type Mouse struct {
+	client *cdp.Client
+	x      float64
+	y      float64
+}
+
+func NewMouse(client *cdp.Client) *Mouse {
+	return &Mouse{client, 0, 0}
+}
+
+func (m *Mouse) Click(ctx context.Context, x, y float64, delay int) error {
+	if err := m.Move(ctx, x, y); err != nil {
+		return err
+	}
+
+	if err := m.Down(ctx, "left"); err != nil {
+		return err
+	}
+
+	releaseDelay := randomDuration(delay)
+
+	time.Sleep(releaseDelay * time.Millisecond)
+
+	return m.Up(ctx, "left")
+}
+
+func (m *Mouse) Down(ctx context.Context, button string) error {
+	return m.client.Input.DispatchMouseEvent(
+		ctx,
+		input.NewDispatchMouseEventArgs("mousePressed", m.x, m.y).
+			SetClickCount(1).
+			SetButton(button),
+	)
+}
+
+func (m *Mouse) Up(ctx context.Context, button string) error {
+	return m.client.Input.DispatchMouseEvent(
+		ctx,
+		input.NewDispatchMouseEventArgs("mouseReleased", m.x, m.y).
+			SetClickCount(1).
+			SetButton(button),
+	)
+}
+
+func (m *Mouse) Move(ctx context.Context, x, y float64) error {
+	return m.MoveBySteps(ctx, x, y, 1)
+}
+
+func (m *Mouse) MoveBySteps(ctx context.Context, x, y float64, steps int) error {
+	fromX := m.x
+	fromY := m.y
+
+	for i := 0; i <= steps; i++ {
+		iFloat := float64(i)
+		stepFloat := float64(steps)
+		toX := fromX + (x-fromX)*(iFloat/stepFloat)
+		toY := fromY + (y-fromY)*(iFloat/stepFloat)
+
+		err := m.client.Input.DispatchMouseEvent(
+			ctx,
+			input.NewDispatchMouseEventArgs("mouseMoved", toX, toY),
+		)
+
+		if err != nil {
+			return err
+		}
+	}
+
+	m.x = x
+	m.y = y
+
+	return nil
+}

pkg/drivers/cdp/input/quad.go

@@ -0,0 +1,124 @@
+package input
+
+import (
+	"context"
+	"math"
+
+	"github.com/mafredri/cdp"
+	"github.com/mafredri/cdp/protocol/dom"
+	"github.com/mafredri/cdp/protocol/runtime"
+	"github.com/pkg/errors"
+)
+
+type Quad struct {
+	X float64
+	Y float64
+}
+
+func fromProtocolQuad(quad dom.Quad) []Quad {
+	return []Quad{
+		{
+			X: quad[0],
+			Y: quad[1],
+		},
+		{
+			X: quad[2],
+			Y: quad[3],
+		},
+		{
+			X: quad[4],
+			Y: quad[5],
+		},
+		{
+			X: quad[6],
+			Y: quad[7],
+		},
+	}
+}
+
+func computeQuadArea(quads []Quad) float64 {
+	var area float64
+
+	for i := range quads {
+		p1 := quads[i]
+		p2 := quads[(i+1)%len(quads)]
+		area += (p1.X*p2.Y - p2.X*p1.Y) / 2
+	}
+
+	return math.Abs(area)
+}
+
+func intersectQuadWithViewport(quad []Quad, width, height float64) []Quad {
+	quads := make([]Quad, 0, len(quad))
+
+	for _, point := range quad {
+		quads = append(quads, Quad{
+			X: math.Min(math.Max(point.X, 0), width),
+			Y: math.Min(math.Max(point.Y, 0), height),
+		})
+	}
+
+	return quads
+}
+
+func getClickablePoint(ctx context.Context, client *cdp.Client, qargs *dom.GetContentQuadsArgs) (Quad, error) {
+	contentQuadsReply, err := client.DOM.GetContentQuads(ctx, qargs)
+
+	if err != nil {
+		return Quad{}, err
+	}
+
+	if contentQuadsReply.Quads == nil || len(contentQuadsReply.Quads) == 0 {
+		return Quad{}, errors.New("node is either not visible or not an HTMLElement")
+	}
+
+	layoutMetricsReply, err := client.Page.GetLayoutMetrics(ctx)
+
+	if err != nil {
+		return Quad{}, err
+	}
+
+	clientWidth := layoutMetricsReply.LayoutViewport.ClientWidth
+	clientHeight := layoutMetricsReply.LayoutViewport.ClientHeight
+
+	quads := make([][]Quad, 0, len(contentQuadsReply.Quads))
+
+	for _, q := range contentQuadsReply.Quads {
+		quad := intersectQuadWithViewport(fromProtocolQuad(q), float64(clientWidth), float64(clientHeight))
+
+		if computeQuadArea(quad) > 1 {
+			quads = append(quads, quad)
+		}
+	}
+
+	if len(quads) == 0 {
+		return Quad{}, errors.New("node is either not visible or not an HTMLElement")
+	}
+
+	// Return the middle point of the first quad.
+	quad := quads[0]
+	var x float64
+	var y float64
+
+	for _, q := range quad {
+		x += q.X
+		y += q.Y
+	}
+
+	return Quad{
+		X: x / 4,
+		Y: y / 4,
+	}, nil
+}
+
+func GetClickablePointByNodeID(ctx context.Context, client *cdp.Client, nodeID dom.NodeID) (Quad, error) {
+	return getClickablePoint(ctx, client, dom.NewGetContentQuadsArgs().SetNodeID(nodeID))
+}
+
+func GetClickablePointByObjectID(ctx context.Context, client *cdp.Client, objectID runtime.RemoteObjectID) (Quad, error) {
+	return getClickablePoint(ctx, client, dom.NewGetContentQuadsArgs().SetObjectID(objectID))
+}
+
+func GetClickablePointByBackendID(ctx context.Context, client *cdp.Client, backendID dom.BackendNodeID) (Quad, error) {
+	return getClickablePoint(ctx, client, dom.NewGetContentQuadsArgs().SetBackendNodeID(backendID))
+}

pkg/drivers/cdp/page.go

@@ -0,0 +1,778 @@
+package cdp
+
+import (
+	"context"
+	"encoding/json"
+	"hash/fnv"
+	"sync"
+
+	"github.com/mafredri/cdp"
+	"github.com/mafredri/cdp/protocol/emulation"
+	"github.com/mafredri/cdp/protocol/network"
+	"github.com/mafredri/cdp/protocol/page"
+	"github.com/mafredri/cdp/rpcc"
+	"github.com/pkg/errors"
+	"github.com/rs/zerolog"
+
+	"github.com/MontFerret/ferret/pkg/drivers"
+	"github.com/MontFerret/ferret/pkg/drivers/cdp/events"
+	"github.com/MontFerret/ferret/pkg/drivers/cdp/input"
+	"github.com/MontFerret/ferret/pkg/drivers/common"
+	"github.com/MontFerret/ferret/pkg/runtime/core"
+	"github.com/MontFerret/ferret/pkg/runtime/logging"
+	"github.com/MontFerret/ferret/pkg/runtime/values"
+)
+
+type HTMLPage struct {
+	mu       sync.Mutex
+	closed   values.Boolean
+	logger   *zerolog.Logger
+	conn     *rpcc.Conn
+	client   *cdp.Client
+	events   *events.EventBroker
+	mouse    *input.Mouse
+	keyboard *input.Keyboard
+	document *HTMLDocument
+	frames   *common.LazyValue
+}
+
+func handleLoadError(logger *zerolog.Logger, client *cdp.Client) {
+	err := client.Page.Close(context.Background())
+
+	if err != nil {
+		logger.Warn().Timestamp().Err(err).Msg("failed to close document on load error")
+	}
+}
+
+func LoadHTMLPage(
+	ctx context.Context,
+	conn *rpcc.Conn,
+	params drivers.OpenPageParams,
+) (*HTMLPage, error) {
+	logger := logging.FromContext(ctx)
+
+	if conn == nil {
+		return nil, core.Error(core.ErrMissedArgument, "connection")
+	}
+
+	client := cdp.NewClient(conn)
+
+	err := runBatch(
+		func() error {
+			return client.Page.Enable(ctx)
+		},
+
+		func() error {
+			return client.Page.SetLifecycleEventsEnabled(
+				ctx,
+				page.NewSetLifecycleEventsEnabledArgs(true),
+			)
+		},
+
+		func() error {
+			return client.DOM.Enable(ctx)
+		},
+
+		func() error {
+			return client.Runtime.Enable(ctx)
+		},
+
+		func() error {
+			ua := common.GetUserAgent(params.UserAgent)
+
+			logger.
+				Debug().
+				Timestamp().
+				Str("user-agent", ua).
+				Msg("using User-Agent")
+
+			// do not use custom user agent
+			if ua == "" {
+				return nil
+			}
+
+			return client.Emulation.SetUserAgentOverride(
+				ctx,
+				emulation.NewSetUserAgentOverrideArgs(ua),
+			)
+		},
+
+		func() error {
+			return client.Network.Enable(ctx, network.NewEnableArgs())
+		},
+	)
+
+	if err != nil {
+		return nil, err
+	}
+
+	err = client.Page.SetBypassCSP(ctx, page.NewSetBypassCSPArgs(true))
+
+	if err != nil {
+		return nil, err
+	}
+
+	if params.Cookies != nil {
+		cookies := make([]network.CookieParam, 0, len(params.Cookies))
+
+		for _, c := range params.Cookies {
+			cookies = append(cookies, fromDriverCookie(params.URL, c))
+
+			logger.
+				Debug().
+				Timestamp().
+				Str("cookie", c.Name).
+				Msg("set cookie")
+		}
+
+		err = client.Network.SetCookies(
+			ctx,
+			network.NewSetCookiesArgs(cookies),
+		)
+
+		if err != nil {
+			return nil, errors.Wrap(err, "failed to set cookies")
+		}
+	}
+
+	if params.Header != nil {
+		j, err := json.Marshal(params.Header)
+
+		if err != nil {
+			return nil, err
+		}
+
+		for k := range params.Header {
+			logger.
+				Debug().
+				Timestamp().
+				Str("header", k).
+				Msg("set header")
+		}
+
+		err = client.Network.SetExtraHTTPHeaders(
+			ctx,
+			network.NewSetExtraHTTPHeadersArgs(network.Headers(j)),
+		)
+
+		if err != nil {
+			return nil, errors.Wrap(err, "failed to set headers")
+		}
+	}
+
+	if params.URL != BlankPageURL && params.URL != "" {
+		repl, err := client.Page.Navigate(ctx, page.NewNavigateArgs(params.URL))
+
+		if err != nil {
+			return nil, errors.Wrap(err, "failed to load the page")
+		}
+
+		if repl.ErrorText != nil {
+			return nil, errors.Wrapf(errors.New(*repl.ErrorText), "failed to load the page: %s", params.URL)
+		}
+
+		err = events.WaitForLoadEvent(ctx, client)
+
+		if err != nil {
+			handleLoadError(logger, client)
+
+			return nil, errors.Wrap(err, "failed to load the page")
+		}
+	}
+
+	broker, err := events.CreateEventBroker(client)
+
+	if err != nil {
+		handleLoadError(logger, client)
+		return nil, errors.Wrap(err, "failed to create event events")
+	}
+
+	mouse := input.NewMouse(client)
+	keyboard := input.NewKeyboard(client)
+
+	doc, err := LoadRootHTMLDocument(ctx, logger, client, broker, mouse, keyboard)
+
+	if err != nil {
+		broker.StopAndClose()
+		handleLoadError(logger, client)
+
+		return nil, errors.Wrap(err, "failed to load root element")
+	}
+
+	return NewHTMLPage(
+		logger,
+		conn,
+		client,
+		broker,
+		mouse,
+		keyboard,
+		doc,
+	), nil
+}
+
+func NewHTMLPage(
+	logger *zerolog.Logger,
+	conn *rpcc.Conn,
+	client *cdp.Client,
+	broker *events.EventBroker,
+	mouse *input.Mouse,
+	keyboard *input.Keyboard,
+	document *HTMLDocument,
+) *HTMLPage {
+	p := new(HTMLPage)
+	p.closed = values.False
+	p.logger = logger
+	p.conn = conn
+	p.client = client
+	p.events = broker
+	p.mouse = mouse
+	p.keyboard = keyboard
+	p.document = document
+	p.frames = common.NewLazyValue(p.unfoldFrames)
+
+	broker.AddEventListener(events.EventLoad, p.handlePageLoad)
+	broker.AddEventListener(events.EventError, p.handleError)
+
+	return p
+}
+
+func (p *HTMLPage) MarshalJSON() ([]byte, error) {
+	p.mu.Lock()
+	defer p.mu.Unlock()
+
+	return p.document.MarshalJSON()
+}
+
+func (p *HTMLPage) Type() core.Type {
+	return drivers.HTMLPageType
+}
+
+func (p *HTMLPage) String() string {
+	p.mu.Lock()
+	defer p.mu.Unlock()
+
+	return p.document.GetURL().String()
+}
+
+func (p *HTMLPage) Compare(other core.Value) int64 {
+	p.mu.Lock()
+	defer p.mu.Unlock()
+
+	tc := drivers.Compare(p.Type(), other.Type())
+
+	if tc != 0 {
+		return tc
+	}
+
+	cdpPage, ok := other.(*HTMLPage)
+
+	if !ok {
+		return 1
+	}
+
+	return p.document.GetURL().Compare(cdpPage.GetURL())
+}
+
+func (p *HTMLPage) Unwrap() interface{} {
+	p.mu.Lock()
+	defer p.mu.Unlock()
+
+	return p
+}
+
+func (p *HTMLPage) Hash() uint64 {
+	p.mu.Lock()
+	defer p.mu.Unlock()
+
+	h := fnv.New64a()
+
+	h.Write([]byte("CDP"))
+	h.Write([]byte(p.Type().String()))
+	h.Write([]byte(":"))
+	h.Write([]byte(p.document.GetURL()))
+
+	return h.Sum64()
+}
+
+func (p *HTMLPage) Copy() core.Value {
+	return values.None
+}
+
+func (p *HTMLPage) GetIn(ctx context.Context, path []core.Value) (core.Value, error) {
+	return common.GetInPage(ctx, p, path)
+}
+
+func (p *HTMLPage) SetIn(ctx context.Context, path []core.Value, value core.Value) error {
+	return common.SetInPage(ctx, p, path, value)
+}
+
+func (p *HTMLPage) Iterate(ctx context.Context) (core.Iterator, error) {
+	p.mu.Lock()
+	defer p.mu.Unlock()
+
+	return p.document.Iterate(ctx)
+}
+
+func (p *HTMLPage) Length() values.Int {
+	p.mu.Lock()
+	defer p.mu.Unlock()
+
+	return p.document.Length()
+}
+
+func (p *HTMLPage) Close() error {
+	p.mu.Lock()
+	defer p.mu.Unlock()
+
+	p.closed = values.True
+	err := p.events.Stop()
+
+	if err != nil {
+		p.logger.Warn().
+			Timestamp().
+			Str("url", p.document.GetURL().String()).
+			Err(err).
+			Msg("failed to stop event events")
+	}
+
+	err = p.events.Close()
+
+	if err != nil {
+		p.logger.Warn().
+			Timestamp().
+			Str("url", p.document.GetURL().String()).
+			Err(err).
+			Msg("failed to close event events")
+	}
+
+	err = p.document.Close()
+
+	if err != nil {
+		p.logger.Warn().
+			Timestamp().
+			Str("url", p.document.GetURL().String()).
+			Err(err).
+			Msg("failed to close root document")
+	}
+
+	err = p.client.Page.Close(context.Background())
+
+	if err != nil {
+		p.logger.Warn().
+			Timestamp().
+			Str("url", p.document.GetURL().String()).
+			Err(err).
+			Msg("failed to close browser page")
+	}
+
+	return p.conn.Close()
+}
+
+func (p *HTMLPage) IsClosed() values.Boolean {
+	p.mu.Lock()
+	defer p.mu.Unlock()
+
+	return p.closed
+}
+
+func (p *HTMLPage) GetURL() values.String {
+	p.mu.Lock()
+	defer p.mu.Unlock()
+
+	return p.document.GetURL()
+}
+
+func (p *HTMLPage) GetMainFrame() drivers.HTMLDocument {
+	p.mu.Lock()
+	defer p.mu.Unlock()
+
+	return p.document
+}
+
+func (p *HTMLPage) GetFrames(ctx context.Context) (*values.Array, error) {
+	p.mu.Lock()
+	defer p.mu.Unlock()
+
+	res, err := p.frames.Read(ctx)
+
+	if err != nil {
+		return nil, err
+	}
+
+	return res.(*values.Array).Clone().(*values.Array), nil
+}
+
+func (p *HTMLPage) GetFrame(ctx context.Context, idx values.Int) (core.Value, error) {
+	p.mu.Lock()
+	defer p.mu.Unlock()
+
+	res, err := p.frames.Read(ctx)
+
+	if err != nil {
+		return nil, err
+	}
+
+	return res.(*values.Array).Get(idx), nil
+}
+
+func (p *HTMLPage) GetCookies(ctx context.Context) (*values.Array, error) {
+	p.mu.Lock()
+	defer p.mu.Unlock()
+
+	repl, err := p.client.Network.GetAllCookies(ctx)
+
+	if err != nil {
+		return values.NewArray(0), err
+	}
+
+	if repl.Cookies == nil {
+		return values.NewArray(0), nil
+	}
+
+	cookies := values.NewArray(len(repl.Cookies))
+
+	for _, c := range repl.Cookies {
+		cookies.Push(toDriverCookie(c))
+	}
+
+	return cookies, nil
+}
+
+func (p *HTMLPage) SetCookies(ctx context.Context, cookies ...drivers.HTTPCookie) error {
+	p.mu.Lock()
+	defer p.mu.Unlock()
+
+	if len(cookies) == 0 {
+		return nil
+	}
+
+	params := make([]network.CookieParam, 0, len(cookies))
+
+	for _, c := range cookies {
+		params = append(params, fromDriverCookie(p.document.GetURL().String(), c))
+	}
+
+	return p.client.Network.SetCookies(ctx, network.NewSetCookiesArgs(params))
+}
+
+func (p *HTMLPage) DeleteCookies(ctx context.Context, cookies ...drivers.HTTPCookie) error {
+	p.mu.Lock()
+	defer p.mu.Unlock()
+
+	if len(cookies) == 0 {
+		return nil
+	}
+
+	var err error
+
+	for _, c := range cookies {
+		err = p.client.Network.DeleteCookies(ctx, fromDriverCookieDelete(p.document.GetURL().String(), c))
+
+		if err != nil {
+			break
+		}
+	}
+
+	return err
+}
+
+func (p *HTMLPage) PrintToPDF(ctx context.Context, params drivers.PDFParams) (values.Binary, error) {
+	p.mu.Lock()
+	defer p.mu.Unlock()
+
+	args := page.NewPrintToPDFArgs()
+	args.
+		SetLandscape(bool(params.Landscape)).
+		SetDisplayHeaderFooter(bool(params.DisplayHeaderFooter)).
+		SetPrintBackground(bool(params.PrintBackground)).
+		SetIgnoreInvalidPageRanges(bool(params.IgnoreInvalidPageRanges)).
+		SetPreferCSSPageSize(bool(params.PreferCSSPageSize))
+
+	if params.Scale > 0 {
+		args.SetScale(float64(params.Scale))
+	}
+
+	if params.PaperWidth > 0 {
+		args.SetPaperWidth(float64(params.PaperWidth))
+	}
+
+	if params.PaperHeight > 0 {
+		args.SetPaperHeight(float64(params.PaperHeight))
+	}
+
+	if params.MarginTop > 0 {
+		args.SetMarginTop(float64(params.MarginTop))
+	}
+
+	if params.MarginBottom > 0 {
+		args.SetMarginBottom(float64(params.MarginBottom))
+	}
+
+	if params.MarginRight > 0 {
+		args.SetMarginRight(float64(params.MarginRight))
+	}
+
+	if params.MarginLeft > 0 {
+		args.SetMarginLeft(float64(params.MarginLeft))
+	}
+
+	if params.PageRanges != values.EmptyString {
+		args.SetPageRanges(string(params.PageRanges))
+	}
+
+	if params.HeaderTemplate != values.EmptyString {
+		args.SetHeaderTemplate(string(params.HeaderTemplate))
+	}
+
+	if params.FooterTemplate != values.EmptyString {
+		args.SetFooterTemplate(string(params.FooterTemplate))
+	}
+
+	reply, err := p.client.Page.PrintToPDF(ctx, args)
+
+	if err != nil {
+		return values.NewBinary([]byte{}), err
+	}
+
+	return values.NewBinary(reply.Data), nil
+}
+
+func (p *HTMLPage) CaptureScreenshot(ctx context.Context, params drivers.ScreenshotParams) (values.Binary, error) {
+	p.mu.Lock()
+	defer p.mu.Unlock()
+
+	metrics, err := p.client.Page.GetLayoutMetrics(ctx)
+
+	if err != nil {
+		return values.NewBinary(nil), err
+	}
+
+	if params.Format == drivers.ScreenshotFormatJPEG && params.Quality < 0 && params.Quality > 100 {
+		params.Quality = 100
+	}
+
+	if params.X < 0 {
+		params.X = 0
+	}
+
+	if params.Y < 0 {
+		params.Y = 0
+	}
+
+	if params.Width <= 0 {
+		params.Width = values.Float(metrics.LayoutViewport.ClientWidth) - params.X
+	}
+
+	if params.Height <= 0 {
+		params.Height = values.Float(metrics.LayoutViewport.ClientHeight) - params.Y
+	}
+
+	clip := page.Viewport{
+		X:      float64(params.X),
+		Y:      float64(params.Y),
+		Width:  float64(params.Width),
+		Height: float64(params.Height),
+		Scale:  1.0,
+	}
+
+	format := string(params.Format)
+	quality := int(params.Quality)
+	args := page.CaptureScreenshotArgs{
+		Format:  &format,
+		Quality: &quality,
+		Clip:    &clip,
+	}
+
+	reply, err := p.client.Page.CaptureScreenshot(ctx, &args)
+
+	if err != nil {
+		return values.NewBinary([]byte{}), err
+	}
+
+	return values.NewBinary(reply.Data), nil
+}
+
+func (p *HTMLPage) Navigate(ctx context.Context, url values.String) error {
+	p.mu.Lock()
+	defer p.mu.Unlock()
+
+	if url == "" {
+		url = BlankPageURL
+	}
+
+	repl, err := p.client.Page.Navigate(ctx, page.NewNavigateArgs(url.String()))
+
+	if err != nil {
+		return err
+	}
+
+	if repl.ErrorText != nil {
+		return errors.New(*repl.ErrorText)
+	}
+
+	return p.WaitForNavigation(ctx)
+}
+
+func (p *HTMLPage) NavigateBack(ctx context.Context, skip values.Int) (values.Boolean, error) {
+	p.mu.Lock()
+	defer p.mu.Unlock()
+
+	history, err := p.client.Page.GetNavigationHistory(ctx)
+
+	if err != nil {
+		return values.False, err
+	}
+
+	// we are in the beginning
+	if history.CurrentIndex == 0 {
+		return values.False, nil
+	}
+
+	if skip < 1 {
+		skip = 1
+	}
+
+	to := history.CurrentIndex - int(skip)
+
+	if to < 0 {
+		// TODO: Return error?
+		return values.False, nil
+	}
+
+	prev := history.Entries[to]
+	err = p.client.Page.NavigateToHistoryEntry(ctx, page.NewNavigateToHistoryEntryArgs(prev.ID))
+
+	if err != nil {
+		return values.False, err
+	}
+
+	err = p.WaitForNavigation(ctx)
+
+	if err != nil {
+		return values.False, err
+	}
+
+	return values.True, nil
+}
+
+func (p *HTMLPage) NavigateForward(ctx context.Context, skip values.Int) (values.Boolean, error) {
+	p.mu.Lock()
+	defer p.mu.Unlock()
+
+	history, err := p.client.Page.GetNavigationHistory(ctx)
+
+	if err != nil {
+		return values.False, err
+	}
+
+	length := len(history.Entries)
+	lastIndex := length - 1
+
+	// nowhere to go forward
+	if history.CurrentIndex == lastIndex {
+		return values.False, nil
+	}
+
+	if skip < 1 {
+		skip = 1
+	}
+
+	to := int(skip) + history.CurrentIndex
+
+	if to > lastIndex {
+		// TODO: Return error?
+		return values.False, nil
+	}
+
+	next := history.Entries[to]
+	err = p.client.Page.NavigateToHistoryEntry(ctx, page.NewNavigateToHistoryEntryArgs(next.ID))
+
+	if err != nil {
+		return values.False, err
+	}
+
+	err = p.WaitForNavigation(ctx)
+
+	if err != nil {
+		return values.False, err
+	}
+
+	return values.True, nil
+}
+
+func (p *HTMLPage) WaitForNavigation(ctx context.Context) error {
+	onEvent := make(chan struct{})
+	var once sync.Once
+	listener := func(_ context.Context, _ interface{}) {
+		once.Do(func() {
+			close(onEvent)
+		})
+	}
+
+	defer p.events.RemoveEventListener(events.EventLoad, listener)
+
+	p.events.AddEventListener(events.EventLoad, listener)
+
+	select {
+	case <-onEvent:
+		return nil
+	case <-ctx.Done():
+		return core.ErrTimeout
+	}
+}
+
+func (p *HTMLPage) handlePageLoad(ctx context.Context, _ interface{}) {
+	p.mu.Lock()
+	defer p.mu.Unlock()
+
+	nextDoc, err := LoadRootHTMLDocument(ctx, p.logger, p.client, p.events, p.mouse, p.keyboard)
+
+	if err != nil {
+		p.logger.Error().
+			Timestamp().
+			Err(err).
+			Msg("failed to load new root document after page load")
+
+		return
+	}
+
+	// close the prev document
+	err = p.document.Close()
+
+	if err != nil {
+		p.logger.Error().
+			Timestamp().
+			Err(err).
+			Msgf("failed to close root document: %s", p.document.GetURL())
+	}
+
+	// set the new root document
+	p.document = nextDoc
+	// reset all loaded frames
+	p.frames.Reset()
+}
+
+func (p *HTMLPage) handleError(_ context.Context, val interface{}) {
+	err, ok := val.(error)
+
+	if !ok {
+		return
+	}
+
+	p.logger.Error().
+		Timestamp().
+		Err(err).
+		Msg("unexpected error")
+}
+
+func (p *HTMLPage) unfoldFrames(ctx context.Context) (core.Value, error) {
+	res := values.NewArray(10)
+
+	err := common.CollectFrames(ctx, res, p.document)
+
+	if err != nil {
+		return nil, err
+	}
+
+	return res, nil
+}

pkg/drivers/cdp/templates/attributes.go

@@ -2,7 +2,9 @@ package templates
 
 import (
 	"fmt"
+
 	"github.com/MontFerret/ferret/pkg/drivers/cdp/eval"
+
 	"github.com/MontFerret/ferret/pkg/runtime/values"
 )
 

pkg/drivers/cdp/templates/wait_by_selector_all.go

@@ -2,11 +2,11 @@ package templates
 
 import (
 	"fmt"
+
+	"github.com/MontFerret/ferret/pkg/drivers"
 	"github.com/MontFerret/ferret/pkg/drivers/cdp/eval"
 	"github.com/MontFerret/ferret/pkg/runtime/core"
 	"github.com/MontFerret/ferret/pkg/runtime/values"
-
-	"github.com/MontFerret/ferret/pkg/drivers"
 )
 
 func WaitBySelectorAll(selector values.String, when drivers.WaitEvent, value core.Value, check string) string {

pkg/drivers/cdp/templates/xpath.go

@@ -0,0 +1,66 @@
+package templates
+
+const xPathTemplate = `
+		(element, expression) => {
+			const out = document.evaluate(
+				expression,
+				element,
+				null,
+				XPathResult.ANY_TYPE
+			);
+			let result;
+		
+			switch (out.resultType) {
+				case XPathResult.UNORDERED_NODE_ITERATOR_TYPE:
+				case XPathResult.ORDERED_NODE_ITERATOR_TYPE: {
+					result = [];
+					let item;
+		
+					while ((item = out.iterateNext())) {
+						result.push(item);
+					}
+		
+					break;
+				}
+				case XPathResult.UNORDERED_NODE_SNAPSHOT_TYPE:
+				case XPathResult.ORDERED_NODE_SNAPSHOT_TYPE: {
+					result = [];
+		
+					for (let i = 0; i < out.snapshotLength; i++) {
+						const item = out.snapshotItem(i);
+		
+						if (item != null) {
+							result.push(item);
+						}
+					}
+					break;
+				}
+				case XPathResult.NUMBER_TYPE: {
+					result = out.numberValue;
+					break;
+				}
+				case XPathResult.STRING_TYPE: {
+					result = out.stringValue;
+					break;
+				}
+				case XPathResult.BOOLEAN_TYPE: {
+					result = out.booleanValue;
+					break;
+				}
+				case XPathResult.ANY_UNORDERED_NODE_TYPE:
+				case XPathResult.FIRST_ORDERED_NODE_TYPE: {
+					result = out.singleNodeValue;
+					break;
+				}
+				default: {
+					break;
+				}
+			}
+		
+			return result;
+		}
+	`
+
+func XPath() string {
+	return xPathTemplate
+}

pkg/drivers/common/frames.go

@@ -0,0 +1,33 @@
+package common
+
+import (
+	"context"
+
+	"github.com/MontFerret/ferret/pkg/drivers"
+	"github.com/MontFerret/ferret/pkg/runtime/core"
+	"github.com/MontFerret/ferret/pkg/runtime/values"
+)
+
+func CollectFrames(ctx context.Context, receiver *values.Array, doc drivers.HTMLDocument) error {
+	receiver.Push(doc)
+
+	children, err := doc.GetChildDocuments(ctx)
+
+	if err != nil {
+		return err
+	}
+
+	children.ForEach(func(value core.Value, idx int) bool {
+		childDoc, ok := value.(drivers.HTMLDocument)
+
+		if !ok {
+			err = core.TypeError(value.Type(), drivers.HTMLDocumentType)
+
+			return false
+		}
+
+		return CollectFrames(ctx, receiver, childDoc) == nil
+	})
+
+	return nil
+}

pkg/drivers/common/getter.go

@@ -9,9 +9,81 @@ import (
 	"github.com/MontFerret/ferret/pkg/runtime/values/types"
 )
 
+func GetInPage(ctx context.Context, page drivers.HTMLPage, path []core.Value) (core.Value, error) {
+	if len(path) == 0 {
+		return page, nil
+	}
+
+	segment := path[0]
+
+	if segment.Type() == types.String {
+		segment := segment.(values.String)
+
+		switch segment {
+		case "mainFrame", "document":
+			return GetInDocument(ctx, page.GetMainFrame(), path[1:])
+		case "frames":
+			if len(path) == 1 {
+				return page.GetFrames(ctx)
+			}
+
+			idx := path[1]
+
+			if !values.IsNumber(idx) {
+				return values.None, core.TypeError(idx.Type(), types.Int, types.Float)
+			}
+
+			value, err := page.GetFrame(ctx, values.ToInt(idx))
+
+			if err != nil {
+				return values.None, err
+			}
+
+			if len(path) == 2 {
+				return value, nil
+			}
+
+			frame, err := drivers.ToDocument(value)
+
+			if err != nil {
+				return values.None, err
+			}
+
+			return GetInDocument(ctx, frame, path[2:])
+		case "url", "URL":
+			return page.GetMainFrame().GetURL(), nil
+		case "cookies":
+			if len(path) == 1 {
+				return page.GetCookies(ctx)
+			}
+
+			switch idx := path[1].(type) {
+			case values.Int:
+				cookies, err := page.GetCookies(ctx)
+
+				if err != nil {
+					return values.None, err
+				}
+
+				return cookies.Get(idx), nil
+			default:
+				return values.None, core.TypeError(idx.Type(), types.Int)
+			}
+		case "isClosed":
+			return page.IsClosed(), nil
+		case "title":
+			return page.GetMainFrame().GetTitle(), nil
+		default:
+			return GetInDocument(ctx, page.GetMainFrame(), path)
+		}
+	}
+
+	return GetInDocument(ctx, page.GetMainFrame(), path)
+}
+
 func GetInDocument(ctx context.Context, doc drivers.HTMLDocument, path []core.Value) (core.Value, error) {
-	if path == nil || len(path) == 0 {
+	if len(path) == 0 {
-		return values.None, nil
+		return doc, nil
 	}
 
 	segment := path[0]
@@ -22,38 +94,53 @@ func GetInDocument(ctx context.Context, doc drivers.HTMLDocument, path []core.Va
 		switch segment {
 		case "url", "URL":
 			return doc.GetURL(), nil
-		case "cookies":
+		case "title":
-			if len(path) == 1 {
+			return doc.GetTitle(), nil
-				return doc.GetCookies(ctx)
+		case "parent":
+			parent := doc.GetParentDocument()
+
+			if parent == nil {
+				return values.None, nil
 			}
 
-			switch idx := path[1].(type) {
+			if len(path) == 1 {
-			case values.Int:
+				return parent, nil
-				cookies, err := doc.GetCookies(ctx)
+			}
+
+			return GetInDocument(ctx, parent, path[1:])
+		case "body", "head":
+			out := doc.QuerySelector(ctx, segment)
+
+			if out == values.None {
+				return out, nil
+			}
+
+			if len(path) == 1 {
+				return out, nil
+			}
+
+			el, err := drivers.ToElement(out)
 
 			if err != nil {
 				return values.None, err
 			}
 
-				return cookies.Get(idx), nil
+			return GetInElement(ctx, el, path[1:])
+		case "innerHTML":
+			return doc.GetElement().GetInnerHTML(ctx), nil
+		case "innerText":
+			return doc.GetElement().GetInnerText(ctx), nil
 		default:
-				return values.None, core.TypeError(idx.Type(), types.Int)
+			return GetInNode(ctx, doc.GetElement(), path)
-			}
-		case "body":
-			return doc.QuerySelector(ctx, "body"), nil
-		case "head":
-			return doc.QuerySelector(ctx, "head"), nil
-		default:
-			return GetInNode(ctx, doc.DocumentElement(), path)
 		}
 	}
 
-	return GetInNode(ctx, doc.DocumentElement(), path)
+	return GetInNode(ctx, doc.GetElement(), path)
 }
 
 func GetInElement(ctx context.Context, el drivers.HTMLElement, path []core.Value) (core.Value, error) {
-	if path == nil || len(path) == 0 {
+	if len(path) == 0 {
-		return values.None, nil
+		return el, nil
 	}
 
 	segment := path[0]
@@ -63,9 +150,9 @@ func GetInElement(ctx context.Context, el drivers.HTMLElement, path []core.Value
 
 		switch segment {
 		case "innerText":
-			return el.InnerText(ctx), nil
+			return el.GetInnerText(ctx), nil
 		case "innerHTML":
-			return el.InnerHTML(ctx), nil
+			return el.GetInnerHTML(ctx), nil
 		case "value":
 			return el.GetValue(ctx), nil
 		case "attributes":
@@ -97,8 +184,8 @@ func GetInElement(ctx context.Context, el drivers.HTMLElement, path []core.Value
 }
 
 func GetInNode(ctx context.Context, node drivers.HTMLNode, path []core.Value) (core.Value, error) {
-	if path == nil || len(path) == 0 {
+	if len(path) == 0 {
-		return values.None, nil
+		return node, nil
 	}
 
 	nt := node.Type()
@@ -118,10 +205,12 @@ func GetInNode(ctx context.Context, node drivers.HTMLNode, path []core.Value) (c
 		segment := segment.(values.String)
 
 		switch segment {
+		case "isDetached":
+			return node.IsDetached(), nil
 		case "nodeType":
-			return node.NodeType(), nil
+			return node.GetNodeType(), nil
 		case "nodeName":
-			return node.NodeName(), nil
+			return node.GetNodeName(), nil
 		case "children":
 			children := node.GetChildNodes(ctx)
 

pkg/drivers/common/lazy.go

@@ -12,7 +12,7 @@ type (
 	LazyValueFactory func(ctx context.Context) (core.Value, error)
 
 	LazyValue struct {
-		sync.Mutex
+		mu      sync.Mutex
 		factory LazyValueFactory
 		ready   bool
 		value   core.Value
@@ -32,8 +32,8 @@ func NewLazyValue(factory LazyValueFactory) *LazyValue {
 // Ready indicates whether the value is ready.
 // @returns (Boolean) - Boolean value indicating whether the value is ready.
 func (lv *LazyValue) Ready() bool {
-	lv.Lock()
+	lv.mu.Lock()
-	defer lv.Unlock()
+	defer lv.mu.Unlock()
 
 	return lv.ready
 }
@@ -42,8 +42,8 @@ func (lv *LazyValue) Ready() bool {
 // Not thread safe. Should not mutated.
 // @returns (Value) - Underlying value if successfully loaded, otherwise error
 func (lv *LazyValue) Read(ctx context.Context) (core.Value, error) {
-	lv.Lock()
+	lv.mu.Lock()
-	defer lv.Unlock()
+	defer lv.mu.Unlock()
 
 	if !lv.ready {
 		lv.load(ctx)
@@ -56,8 +56,8 @@ func (lv *LazyValue) Read(ctx context.Context) (core.Value, error) {
 // Loads a value if it's not ready.
 // Thread safe.
 func (lv *LazyValue) Write(ctx context.Context, writer func(v core.Value, err error)) {
-	lv.Lock()
+	lv.mu.Lock()
-	defer lv.Unlock()
+	defer lv.mu.Unlock()
 
 	if !lv.ready {
 		lv.load(ctx)
@@ -69,8 +69,8 @@ func (lv *LazyValue) Write(ctx context.Context, writer func(v core.Value, err er
 // Reset resets the storage.
 // Next call of Read will trigger the factory function again.
 func (lv *LazyValue) Reset() {
-	lv.Lock()
+	lv.mu.Lock()
-	defer lv.Unlock()
+	defer lv.mu.Unlock()
 
 	lv.ready = false
 	lv.value = values.None

pkg/drivers/common/setter.go

@@ -9,31 +9,24 @@ import (
 	"github.com/MontFerret/ferret/pkg/runtime/values/types"
 )
 
-func SetInDocument(ctx context.Context, doc drivers.HTMLDocument, path []core.Value, value core.Value) error {
+func SetInPage(ctx context.Context, page drivers.HTMLPage, path []core.Value, value core.Value) error {
-	if path == nil || len(path) == 0 {
+	if len(path) == 0 {
 		return nil
 	}
 
-	segment := path[0]
+	return SetInDocument(ctx, page.GetMainFrame(), path, value)
-
-	if segment.Type() == types.String {
-		segment := segment.(values.String)
-
-		switch segment {
-		case "url", "URL":
-			return doc.SetURL(ctx, values.NewString(value.String()))
-		case "cookies":
-
-		default:
-			return SetInNode(ctx, doc, path, value)
 }
+
+func SetInDocument(ctx context.Context, doc drivers.HTMLDocument, path []core.Value, value core.Value) error {
+	if len(path) == 0 {
+		return nil
 	}
 
 	return SetInNode(ctx, doc, path, value)
 }
 
 func SetInElement(ctx context.Context, el drivers.HTMLElement, path []core.Value, value core.Value) error {
-	if path == nil || len(path) == 0 {
+	if len(path) == 0 {
 		return nil
 	}
 
@@ -115,7 +108,7 @@ func SetInElement(ctx context.Context, el drivers.HTMLElement, path []core.Value
 }
 
 func SetInNode(_ context.Context, _ drivers.HTMLNode, path []core.Value, _ core.Value) error {
-	if path == nil || len(path) == 0 {
+	if len(path) == 0 {
 		return nil
 	}
 

pkg/drivers/common/styles.go

@@ -3,12 +3,13 @@ package common
 import (
 	"bytes"
 	"context"
-	"github.com/MontFerret/ferret/pkg/runtime/core"
 	"strconv"
 	"strings"
 
-	"github.com/MontFerret/ferret/pkg/runtime/values"
 	"github.com/gorilla/css/scanner"
+
+	"github.com/MontFerret/ferret/pkg/runtime/core"
+	"github.com/MontFerret/ferret/pkg/runtime/values"
 )
 
 func DeserializeStyles(input values.String) (*values.Object, error) {

pkg/drivers/common/types.go

@@ -1,8 +1,10 @@
 package common
 
-import "golang.org/x/net/html"
+import (
+	"golang.org/x/net/html"
+)
 
-func ToHTMLType(nt html.NodeType) int {
+func FromHTMLType(nt html.NodeType) int {
 	switch nt {
 	case html.DocumentNode:
 		return 9
@@ -18,3 +20,20 @@ func ToHTMLType(nt html.NodeType) int {
 
 	return 0
 }
+
+func ToHTMLType(input int) html.NodeType {
+	switch input {
+	case 1:
+		return html.ElementNode
+	case 3:
+		return html.TextNode
+	case 8:
+		return html.CommentNode
+	case 9:
+		return html.DocumentNode
+	case 10:
+		return html.DoctypeNode
+	default:
+		return html.ErrorNode
+	}
+}

pkg/drivers/cookie.go

@@ -38,6 +38,17 @@ const (
 	SameSiteStrictMode
 )
 
+func (s SameSite) String() string {
+	switch s {
+	case SameSiteLaxMode:
+		return "Lax"
+	case SameSiteStrictMode:
+		return "Strict"
+	default:
+		return ""
+	}
+}
+
 func (c HTTPCookie) Type() core.Type {
 	return HTTPCookieType
 }
@@ -119,7 +130,7 @@ func (c HTTPCookie) Hash() uint64 {
 	h.Write([]byte(strconv.Itoa(c.MaxAge)))
 	h.Write([]byte(fmt.Sprintf("%t", c.Secure)))
 	h.Write([]byte(fmt.Sprintf("%t", c.HTTPOnly)))
-	h.Write([]byte(strconv.Itoa(int(c.SameSite))))
+	h.Write([]byte(c.SameSite.String()))
 
 	return h.Sum64()
 }
@@ -138,7 +149,7 @@ func (c HTTPCookie) MarshalJSON() ([]byte, error) {
 		"max_age":   c.MaxAge,
 		"secure":    c.Secure,
 		"http_only": c.HTTPOnly,
-		"same_site": c.SameSite,
+		"same_site": c.SameSite.String(),
 	}
 
 	out, err := json.Marshal(v)
@@ -181,14 +192,7 @@ func (c HTTPCookie) GetIn(_ context.Context, path []core.Value) (core.Value, err
 	case "httpOnly":
 		return values.NewBoolean(c.HTTPOnly), nil
 	case "sameSite":
-		switch c.SameSite {
+		return values.NewString(c.SameSite.String()), nil
-		case SameSiteLaxMode:
-			return values.NewString("Lax"), nil
-		case SameSiteStrictMode:
-			return values.NewString("Strict"), nil
-		default:
-			return values.EmptyString, nil
-		}
 	default:
 		return values.None, nil
 	}

pkg/drivers/cookie_test.go

@@ -0,0 +1,33 @@
+package drivers_test
+
+import (
+	"testing"
+
+	. "github.com/smartystreets/goconvey/convey"
+
+	"github.com/MontFerret/ferret/pkg/drivers"
+)
+
+func TestHTTPCookie(t *testing.T) {
+	Convey("HTTPCookie", t, func() {
+		Convey(".MarshalJSON", func() {
+			Convey("Should serialize cookie values", func() {
+				cookie := &drivers.HTTPCookie{}
+
+				cookie.Name = "test_cookie"
+				cookie.Value = "test_value"
+				cookie.Domain = "montferret.dev"
+				cookie.HTTPOnly = true
+				cookie.MaxAge = 320
+				cookie.Path = "/"
+				cookie.SameSite = drivers.SameSiteLaxMode
+				cookie.Secure = true
+
+				out, err := cookie.MarshalJSON()
+
+				So(err, ShouldBeNil)
+				So(string(out), ShouldEqual, `{"domain":"montferret.dev","expires":"0001-01-01T00:00:00Z","http_only":true,"max_age":320,"name":"test_cookie","path":"/","same_site":"Lax","secure":true,"value":"test_value"}`)
+			})
+		})
+	})
+}

pkg/drivers/driver.go

@@ -18,7 +18,7 @@ type (
 		drivers map[string]Driver
 	}
 
-	LoadDocumentParams struct {
+	OpenPageParams struct {
 		URL         string
 		UserAgent   string
 		KeepCookies bool
@@ -29,7 +29,7 @@ type (
 	Driver interface {
 		io.Closer
 		Name() string
-		LoadDocument(ctx context.Context, params LoadDocumentParams) (HTMLDocument, error)
+		Open(ctx context.Context, params OpenPageParams) (HTMLPage, error)
 	}
 )
 

pkg/drivers/header.go

@@ -15,7 +15,7 @@ import (
 	"github.com/MontFerret/ferret/pkg/runtime/values/types"
 )
 
-// HTTPCookie HTTPCookie object
+// HTTPHeader HTTP header object
 type HTTPHeader map[string][]string
 
 func (h HTTPHeader) Type() core.Type {
@@ -101,7 +101,7 @@ func (h HTTPHeader) Copy() core.Value {
 }
 
 func (h HTTPHeader) MarshalJSON() ([]byte, error) {
-	out, err := json.Marshal(h)
+	out, err := json.Marshal(map[string][]string(h))
 
 	if err != nil {
 		return nil, err

pkg/drivers/header_test.go

@@ -0,0 +1,26 @@
+package drivers_test
+
+import (
+	"github.com/MontFerret/ferret/pkg/drivers"
+	"testing"
+
+	. "github.com/smartystreets/goconvey/convey"
+)
+
+func TestHTTPHeader(t *testing.T) {
+	Convey("HTTPHeader", t, func() {
+		Convey(".MarshalJSON", func() {
+			Convey("Should serialize header values", func() {
+				headers := make(drivers.HTTPHeader)
+
+				headers["content-encoding"] = []string{"gzip"}
+				headers["content-type"] = []string{"text/html", "charset=utf-8"}
+
+				out, err := headers.MarshalJSON()
+
+				So(err, ShouldBeNil)
+				So(string(out), ShouldEqual, `{"content-encoding":["gzip"],"content-type":["text/html","charset=utf-8"]}`)
+			})
+		})
+	})
+}

pkg/drivers/helpers.go

@@ -2,8 +2,53 @@ package drivers
 
 import (
 	"context"
+
+	"github.com/MontFerret/ferret/pkg/runtime/core"
 )
 
 func WithDefaultTimeout(ctx context.Context) (context.Context, context.CancelFunc) {
 	return context.WithTimeout(ctx, DefaultTimeout)
 }
+
+func ToPage(value core.Value) (HTMLPage, error) {
+	err := core.ValidateType(value, HTMLPageType)
+
+	if err != nil {
+		return nil, err
+	}
+
+	return value.(HTMLPage), nil
+}
+
+func ToDocument(value core.Value) (HTMLDocument, error) {
+	switch v := value.(type) {
+	case HTMLPage:
+		return v.GetMainFrame(), nil
+	case HTMLDocument:
+		return v, nil
+	default:
+		return nil, core.TypeError(
+			value.Type(),
+			HTMLPageType,
+			HTMLDocumentType,
+		)
+	}
+}
+
+func ToElement(value core.Value) (HTMLElement, error) {
+	switch v := value.(type) {
+	case HTMLPage:
+		return v.GetMainFrame().GetElement(), nil
+	case HTMLDocument:
+		return v.GetElement(), nil
+	case HTMLElement:
+		return v, nil
+	default:
+		return nil, core.TypeError(
+			value.Type(),
+			HTMLPageType,
+			HTMLDocumentType,
+			HTMLElementType,
+		)
+	}
+}

pkg/drivers/http/document.go

@@ -12,17 +12,25 @@ import (
 )
 
 type HTMLDocument struct {
-	docNode *goquery.Document
+	doc      *goquery.Document
 	element  drivers.HTMLElement
 	url      values.String
-	cookies []drivers.HTTPCookie
+	parent   drivers.HTMLDocument
+	children *values.Array
+}
+
+func NewRootHTMLDocument(
+	node *goquery.Document,
+	url string,
+) (*HTMLDocument, error) {
+	return NewHTMLDocument(node, url, nil)
 }
 
 func NewHTMLDocument(
 	node *goquery.Document,
 	url string,
-	cookies []drivers.HTTPCookie,
+	parent drivers.HTMLDocument,
-) (drivers.HTMLDocument, error) {
+) (*HTMLDocument, error) {
 	if url == "" {
 		return nil, core.Error(core.ErrMissedArgument, "document url")
 	}
@@ -37,7 +45,21 @@ func NewHTMLDocument(
 		return nil, err
 	}
 
-	return &HTMLDocument{node, el, values.NewString(url), cookies}, nil
+	doc := new(HTMLDocument)
+	doc.doc = node
+	doc.element = el
+	doc.parent = parent
+	doc.url = values.NewString(url)
+	doc.children = values.NewArray(10)
+
+	frames := node.Find("iframe")
+	frames.Each(func(i int, selection *goquery.Selection) {
+		child, _ := NewHTMLDocument(goquery.NewDocumentFromNode(selection.Nodes[0]), selection.AttrOr("src", url), doc)
+
+		doc.children.Push(child)
+	})
+
+	return doc, nil
 }
 
 func (doc *HTMLDocument) MarshalJSON() ([]byte, error) {
@@ -49,7 +71,7 @@ func (doc *HTMLDocument) Type() core.Type {
 }
 
 func (doc *HTMLDocument) String() string {
-	str, err := doc.docNode.Html()
+	str, err := doc.doc.Html()
 
 	if err != nil {
 		return ""
@@ -70,7 +92,7 @@ func (doc *HTMLDocument) Compare(other core.Value) int64 {
 }
 
 func (doc *HTMLDocument) Unwrap() interface{} {
-	return doc.docNode
+	return doc.doc
 }
 
 func (doc *HTMLDocument) Hash() uint64 {
@@ -84,7 +106,7 @@ func (doc *HTMLDocument) Hash() uint64 {
 }
 
 func (doc *HTMLDocument) Copy() core.Value {
-	cp, err := NewHTMLDocument(doc.docNode, string(doc.url), doc.cookies)
+	cp, err := NewHTMLDocument(doc.doc, string(doc.url), doc.parent)
 
 	if err != nil {
 		return values.None
@@ -94,27 +116,17 @@ func (doc *HTMLDocument) Copy() core.Value {
 }
 
 func (doc *HTMLDocument) Clone() core.Value {
-	var cookies []drivers.HTTPCookie
+	cloned, err := NewHTMLDocument(doc.doc, doc.url.String(), doc.parent)
-
-	if doc.cookies != nil {
-		cookies = make([]drivers.HTTPCookie, 0, len(doc.cookies))
-
-		for i, c := range doc.cookies {
-			cookies[i] = c
-		}
-	}
-
-	cp, err := NewHTMLDocument(goquery.CloneDocument(doc.docNode), string(doc.url), cookies)
 
 	if err != nil {
 		return values.None
 	}
 
-	return cp
+	return cloned
 }
 
 func (doc *HTMLDocument) Length() values.Int {
-	return values.NewInt(doc.docNode.Length())
+	return values.NewInt(doc.doc.Length())
 }
 
 func (doc *HTMLDocument) Iterate(_ context.Context) (core.Iterator, error) {
@@ -129,11 +141,11 @@ func (doc *HTMLDocument) SetIn(ctx context.Context, path []core.Value, value cor
 	return common.SetInDocument(ctx, doc, path, value)
 }
 
-func (doc *HTMLDocument) NodeType() values.Int {
+func (doc *HTMLDocument) GetNodeType() values.Int {
 	return 9
 }
 
-func (doc *HTMLDocument) NodeName() values.String {
+func (doc *HTMLDocument) GetNodeName() values.String {
 	return "#document"
 }
 
@@ -161,50 +173,38 @@ func (doc *HTMLDocument) ExistsBySelector(ctx context.Context, selector values.S
 	return doc.element.ExistsBySelector(ctx, selector)
 }
 
-func (doc *HTMLDocument) DocumentElement() drivers.HTMLElement {
+func (doc *HTMLDocument) XPath(ctx context.Context, expression values.String) (core.Value, error) {
-	return doc.element
+	return doc.element.XPath(ctx, expression)
 }
 
-func (doc *HTMLDocument) GetURL() core.Value {
+func (doc *HTMLDocument) IsDetached() values.Boolean {
+	return values.False
+}
+
+func (doc *HTMLDocument) GetTitle() values.String {
+	title := doc.doc.Find("head > title")
+
+	return values.NewString(title.Text())
+}
+
+func (doc *HTMLDocument) GetChildDocuments(_ context.Context) (*values.Array, error) {
+	return doc.children.Clone().(*values.Array), nil
+}
+
+func (doc *HTMLDocument) GetURL() values.String {
 	return doc.url
 }
 
-func (doc *HTMLDocument) SetURL(_ context.Context, _ values.String) error {
+func (doc *HTMLDocument) GetElement() drivers.HTMLElement {
-	return core.ErrInvalidOperation
+	return doc.element
 }
 
-func (doc *HTMLDocument) GetCookies(_ context.Context) (*values.Array, error) {
+func (doc *HTMLDocument) GetName() values.String {
-	if doc.cookies == nil {
+	return ""
-		return values.NewArray(0), nil
 }
 
-	arr := values.NewArray(len(doc.cookies))
+func (doc *HTMLDocument) GetParentDocument() drivers.HTMLDocument {
-
+	return doc.parent
-	for _, c := range doc.cookies {
-		arr.Push(c)
-	}
-
-	return arr, nil
-}
-
-func (doc *HTMLDocument) SetCookies(_ context.Context, _ ...drivers.HTTPCookie) error {
-	return core.ErrNotSupported
-}
-
-func (doc *HTMLDocument) DeleteCookies(_ context.Context, _ ...drivers.HTTPCookie) error {
-	return core.ErrNotSupported
-}
-
-func (doc *HTMLDocument) Navigate(_ context.Context, _ values.String) error {
-	return core.ErrNotSupported
-}
-
-func (doc *HTMLDocument) NavigateBack(_ context.Context, _ values.Int) (values.Boolean, error) {
-	return false, core.ErrNotSupported
-}
-
-func (doc *HTMLDocument) NavigateForward(_ context.Context, _ values.Int) (values.Boolean, error) {
-	return false, core.ErrNotSupported
 }
 
 func (doc *HTMLDocument) ClickBySelector(_ context.Context, _ values.String) (values.Boolean, error) {

pkg/drivers/http/document_test.go

@@ -2,10 +2,12 @@ package http_test
 
 import (
 	"bytes"
+	"testing"
+
 	"github.com/MontFerret/ferret/pkg/drivers/http"
+
 	"github.com/PuerkitoBio/goquery"
 	. "github.com/smartystreets/goconvey/convey"
-	"testing"
 )
 
 func TestDocument(t *testing.T) {
@@ -218,7 +220,7 @@ func TestDocument(t *testing.T) {
     </footer>
 	<svg xmlns="http://www.w3.org/2000/svg" width="348" height="225" viewBox="0 0 348 225" preserveAspectRatio="none" style="display: none; visibility: hidden; position: absolute; top: -100%; left: -100%;"><defs><style type="text/css"></style></defs><text x="0" y="17" style="font-weight:bold;font-size:17pt;font-family:Arial, Helvetica, Open Sans, sans-serif">Thumbnail</text></svg></body></html>
 	`
-	Convey(".NodeType", t, func() {
+	Convey(".GetNodeType", t, func() {
 		Convey("Should serialize a boolean value", func() {
 			buff := bytes.NewBuffer([]byte(doc))
 
@@ -232,7 +234,7 @@ func TestDocument(t *testing.T) {
 
 			So(err, ShouldBeNil)
 
-			So(el.NodeType(), ShouldEqual, 9)
+			So(el.GetNodeType(), ShouldEqual, 9)
 		})
 	})
 }

pkg/drivers/http/driver.go

@@ -62,7 +62,7 @@ func (drv *Driver) Name() string {
 	return DriverName
 }
 
-func (drv *Driver) LoadDocument(ctx context.Context, params drivers.LoadDocumentParams) (drivers.HTMLDocument, error) {
+func (drv *Driver) Open(ctx context.Context, params drivers.OpenPageParams) (drivers.HTMLPage, error) {
 	req, err := http.NewRequest(http.MethodGet, params.URL, nil)
 
 	if err != nil {
@@ -119,6 +119,10 @@ func (drv *Driver) LoadDocument(ctx context.Context, params drivers.LoadDocument
 		Str("user-agent", ua).
 		Msg("using User-Agent")
 
+	if ua != "" {
+		req.Header.Set("User-Agent", ua)
+	}
+
 	resp, err := drv.client.Do(req)
 
 	if err != nil {
@@ -127,16 +131,20 @@ func (drv *Driver) LoadDocument(ctx context.Context, params drivers.LoadDocument
 
 	defer resp.Body.Close()
 
+	if resp.StatusCode != http.StatusOK {
+		return nil, errors.New(resp.Status)
+	}
+
 	doc, err := goquery.NewDocumentFromReader(resp.Body)
 
 	if err != nil {
 		return nil, errors.Wrapf(err, "failed to parse a document %s", params.URL)
 	}
 
-	return NewHTMLDocument(doc, params.URL, params.Cookies)
+	return NewHTMLPage(doc, params.URL, params.Cookies)
 }
 
-func (drv *Driver) ParseDocument(_ context.Context, str values.String) (drivers.HTMLDocument, error) {
+func (drv *Driver) Parse(_ context.Context, str values.String) (drivers.HTMLPage, error) {
 	buf := bytes.NewBuffer([]byte(str))
 
 	doc, err := goquery.NewDocumentFromReader(buf)
@@ -145,7 +153,7 @@ func (drv *Driver) ParseDocument(_ context.Context, str values.String) (drivers.
 		return nil, errors.Wrap(err, "failed to parse a document")
 	}
 
-	return NewHTMLDocument(doc, "#string", nil)
+	return NewHTMLPage(doc, "#blank", nil)
 }
 
 func (drv *Driver) Close() error {

pkg/drivers/http/element.go

@@ -3,6 +3,8 @@ package http
 import (
 	"context"
 	"encoding/json"
+	"fmt"
+	"github.com/antchfx/htmlquery"
 	"hash/fnv"
 	"strings"
 
@@ -10,7 +12,9 @@ import (
 	"github.com/MontFerret/ferret/pkg/drivers/common"
 	"github.com/MontFerret/ferret/pkg/runtime/core"
 	"github.com/MontFerret/ferret/pkg/runtime/values"
+
 	"github.com/PuerkitoBio/goquery"
+	"github.com/antchfx/xpath"
 )
 
 type HTMLElement struct {
@@ -29,7 +33,7 @@ func NewHTMLElement(node *goquery.Selection) (drivers.HTMLElement, error) {
 }
 
 func (el *HTMLElement) MarshalJSON() ([]byte, error) {
-	return json.Marshal(el.InnerText(context.Background()).String())
+	return json.Marshal(el.GetInnerText(context.Background()).String())
 }
 
 func (el *HTMLElement) Type() core.Type {
@@ -37,7 +41,7 @@ func (el *HTMLElement) Type() core.Type {
 }
 
 func (el *HTMLElement) String() string {
-	return el.InnerHTML(context.Background()).String()
+	return el.GetInnerHTML(context.Background()).String()
 }
 
 func (el *HTMLElement) Compare(other core.Value) int64 {
@@ -48,7 +52,7 @@ func (el *HTMLElement) Compare(other core.Value) int64 {
 		ctx, fn := drivers.WithDefaultTimeout(context.Background())
 		defer fn()
 
-		return el.InnerHTML(ctx).Compare(other.InnerHTML(ctx))
+		return el.GetInnerHTML(ctx).Compare(other.GetInnerHTML(ctx))
 	default:
 		return drivers.Compare(el.Type(), other.Type())
 	}
@@ -80,21 +84,25 @@ func (el *HTMLElement) Copy() core.Value {
 	return c
 }
 
-func (el *HTMLElement) NodeType() values.Int {
+func (el *HTMLElement) IsDetached() values.Boolean {
+	return values.True
+}
+
+func (el *HTMLElement) GetNodeType() values.Int {
 	nodes := el.selection.Nodes
 
 	if len(nodes) == 0 {
 		return 0
 	}
 
-	return values.NewInt(common.ToHTMLType(nodes[0].Type))
+	return values.NewInt(common.FromHTMLType(nodes[0].Type))
 }
 
 func (el *HTMLElement) Close() error {
 	return nil
 }
 
-func (el *HTMLElement) NodeName() values.String {
+func (el *HTMLElement) GetNodeName() values.String {
 	return values.NewString(goquery.NodeName(el.selection))
 }
 
@@ -122,11 +130,11 @@ func (el *HTMLElement) SetValue(_ context.Context, value core.Value) error {
 	return nil
 }
 
-func (el *HTMLElement) InnerText(_ context.Context) values.String {
+func (el *HTMLElement) GetInnerText(_ context.Context) values.String {
 	return values.NewString(el.selection.Text())
 }
 
-func (el *HTMLElement) InnerHTML(_ context.Context) values.String {
+func (el *HTMLElement) GetInnerHTML(_ context.Context) values.String {
 	h, err := el.selection.Html()
 
 	if err != nil {
@@ -304,6 +312,53 @@ func (el *HTMLElement) QuerySelectorAll(_ context.Context, selector values.Strin
 	return arr
 }
 
+func (el *HTMLElement) XPath(_ context.Context, expression values.String) (core.Value, error) {
+	h, err := outerHTML(el.selection)
+
+	if err != nil {
+		return values.None, err
+	}
+
+	exp, err := xpath.Compile(expression.String())
+
+	if err != nil {
+		return values.None, err
+	}
+
+	rootNode, err := htmlquery.Parse(strings.NewReader(h))
+
+	if err != nil {
+		return values.None, err
+	}
+
+	fmt.Println(htmlquery.OutputHTML(rootNode, true))
+
+	out := exp.Evaluate(htmlquery.CreateXPathNavigator(rootNode))
+
+	switch res := out.(type) {
+	case *xpath.NodeIterator:
+		items := values.NewArray(10)
+
+		for {
+			if !res.MoveNext() {
+				break
+			}
+
+			item, err := parseXPathNode(res.Current().(*htmlquery.NodeNavigator))
+
+			if err != nil {
+				return values.None, err
+			}
+
+			items.Push(item)
+		}
+
+		return items, nil
+	default:
+		return values.Parse(res), nil
+	}
+}
+
 func (el *HTMLElement) InnerHTMLBySelector(_ context.Context, selector values.String) values.String {
 	selection := el.selection.Find(selector.String())
 

pkg/drivers/http/element_test.go

@@ -244,7 +244,7 @@ func TestElement(t *testing.T) {
 	<svg xmlns="http://www.w3.org/2000/svg" width="348" height="225" viewBox="0 0 348 225" preserveAspectRatio="none" style="display: none; visibility: hidden; position: absolute; top: -100%; left: -100%;"><defs><style type="text/css"></style></defs><text x="0" y="17" style="font-weight:bold;font-size:17pt;font-family:Arial, Helvetica, Open Sans, sans-serif">Thumbnail</text></svg></body></html>
 `
 
-	Convey(".NodeType", t, func() {
+	Convey(".GetNodeType", t, func() {
 		buff := bytes.NewBuffer([]byte(doc))
 
 		buff.Write([]byte(doc))
@@ -257,10 +257,10 @@ func TestElement(t *testing.T) {
 
 		So(err, ShouldBeNil)
 
-		So(el.NodeType(), ShouldEqual, 1)
+		So(el.GetNodeType(), ShouldEqual, 1)
 	})
 
-	Convey(".NodeName", t, func() {
+	Convey(".GetNodeName", t, func() {
 		buff := bytes.NewBuffer([]byte(doc))
 
 		buff.Write([]byte(doc))
@@ -273,7 +273,7 @@ func TestElement(t *testing.T) {
 
 		So(err, ShouldBeNil)
 
-		So(el.NodeName(), ShouldEqual, "body")
+		So(el.GetNodeName(), ShouldEqual, "body")
 	})
 
 	Convey(".Length", t, func() {
@@ -327,7 +327,7 @@ func TestElement(t *testing.T) {
 		So(v, ShouldEqual, "find")
 	})
 
-	Convey(".InnerText", t, func() {
+	Convey(".GetInnerText", t, func() {
 		buff := bytes.NewBuffer([]byte(`
 			<html>
 				<head></head>
@@ -349,7 +349,7 @@ func TestElement(t *testing.T) {
 
 		So(err, ShouldBeNil)
 
-		v := el.InnerText(context.Background())
+		v := el.GetInnerText(context.Background())
 
 		So(v, ShouldEqual, "Ferret")
 	})
@@ -376,7 +376,7 @@ func TestElement(t *testing.T) {
 
 		So(err, ShouldBeNil)
 
-		v := el.InnerHTML(context.Background())
+		v := el.GetInnerHTML(context.Background())
 
 		So(v, ShouldEqual, "<h2>Ferret</h2>")
 	})
@@ -396,7 +396,7 @@ func TestElement(t *testing.T) {
 
 		So(found, ShouldNotEqual, values.None)
 
-		v := found.(drivers.HTMLNode).NodeName()
+		v := found.(drivers.HTMLNode).GetNodeName()
 
 		So(err, ShouldBeNil)
 

pkg/drivers/http/helpers.go

@@ -0,0 +1,47 @@
+package http
+
+import (
+	"bytes"
+	"golang.org/x/net/html"
+
+	"github.com/MontFerret/ferret/pkg/runtime/core"
+	"github.com/MontFerret/ferret/pkg/runtime/values"
+
+	"github.com/PuerkitoBio/goquery"
+	"github.com/antchfx/htmlquery"
+	"github.com/antchfx/xpath"
+)
+
+func parseXPathNode(nav *htmlquery.NodeNavigator) (core.Value, error) {
+	node := nav.Current()
+
+	if node == nil {
+		return values.None, nil
+	}
+
+	switch nav.NodeType() {
+	case xpath.ElementNode:
+		return NewHTMLElement(&goquery.Selection{Nodes: []*html.Node{node}})
+	case xpath.RootNode:
+		url := htmlquery.SelectAttr(node, "url")
+		return NewHTMLDocument(goquery.NewDocumentFromNode(node), url, nil)
+	default:
+		return values.Parse(node.Data), nil
+	}
+}
+
+func outerHTML(s *goquery.Selection) (string, error) {
+	var buf bytes.Buffer
+
+	if len(s.Nodes) > 0 {
+		c := s.Nodes[0]
+
+		err := html.Render(&buf, c)
+
+		if err != nil {
+			return "", err
+		}
+	}
+
+	return buf.String(), nil
+}

pkg/drivers/http/page.go

@@ -0,0 +1,199 @@
+package http
+
+import (
+	"context"
+	"github.com/MontFerret/ferret/pkg/drivers"
+	"github.com/MontFerret/ferret/pkg/drivers/common"
+	"github.com/MontFerret/ferret/pkg/runtime/core"
+	"github.com/MontFerret/ferret/pkg/runtime/values"
+	"github.com/PuerkitoBio/goquery"
+	"hash/fnv"
+)
+
+type HTMLPage struct {
+	document *HTMLDocument
+	cookies  []drivers.HTTPCookie
+	frames   *values.Array
+}
+
+func NewHTMLPage(
+	qdoc *goquery.Document,
+	url string,
+	cookies []drivers.HTTPCookie,
+) (*HTMLPage, error) {
+	doc, err := NewRootHTMLDocument(qdoc, url)
+
+	if err != nil {
+		return nil, err
+	}
+
+	p := new(HTMLPage)
+	p.document = doc
+	p.cookies = cookies
+	p.frames = nil
+
+	return p, nil
+}
+
+func (p *HTMLPage) MarshalJSON() ([]byte, error) {
+	return p.document.MarshalJSON()
+}
+
+func (p *HTMLPage) Type() core.Type {
+	return drivers.HTMLPageType
+}
+
+func (p *HTMLPage) String() string {
+	return p.document.GetURL().String()
+}
+
+func (p *HTMLPage) Compare(other core.Value) int64 {
+	tc := drivers.Compare(p.Type(), other.Type())
+
+	if tc != 0 {
+		return tc
+	}
+
+	httpPage, ok := other.(*HTMLPage)
+
+	if !ok {
+		return 1
+	}
+
+	return p.document.GetURL().Compare(httpPage.GetURL())
+}
+
+func (p *HTMLPage) Unwrap() interface{} {
+	return p.document
+}
+
+func (p *HTMLPage) Hash() uint64 {
+	h := fnv.New64a()
+
+	h.Write([]byte("HTTP"))
+	h.Write([]byte(p.Type().String()))
+	h.Write([]byte(":"))
+	h.Write([]byte(p.document.GetURL()))
+
+	return h.Sum64()
+}
+
+func (p *HTMLPage) Copy() core.Value {
+	page, err := NewHTMLPage(p.document.doc, p.document.GetURL().String(), p.cookies[:])
+
+	if err != nil {
+		return values.None
+	}
+
+	return page
+}
+
+func (p *HTMLPage) Iterate(ctx context.Context) (core.Iterator, error) {
+	return p.document.Iterate(ctx)
+}
+
+func (p *HTMLPage) GetIn(ctx context.Context, path []core.Value) (core.Value, error) {
+	return common.GetInPage(ctx, p, path)
+}
+
+func (p *HTMLPage) SetIn(ctx context.Context, path []core.Value, value core.Value) error {
+	return common.SetInPage(ctx, p, path, value)
+}
+
+func (p *HTMLPage) Length() values.Int {
+	return p.document.Length()
+}
+
+func (p *HTMLPage) Close() error {
+	return nil
+}
+
+func (p *HTMLPage) IsClosed() values.Boolean {
+	return values.True
+}
+
+func (p *HTMLPage) GetURL() values.String {
+	return p.document.GetURL()
+}
+
+func (p *HTMLPage) GetMainFrame() drivers.HTMLDocument {
+	return p.document
+}
+
+func (p *HTMLPage) GetFrames(ctx context.Context) (*values.Array, error) {
+	if p.frames == nil {
+		arr := values.NewArray(10)
+
+		err := common.CollectFrames(ctx, arr, p.document)
+
+		if err != nil {
+			return values.NewArray(0), err
+		}
+
+		p.frames = arr
+	}
+
+	return p.frames, nil
+}
+
+func (p *HTMLPage) GetFrame(ctx context.Context, idx values.Int) (core.Value, error) {
+	if p.frames == nil {
+		arr := values.NewArray(10)
+
+		err := common.CollectFrames(ctx, arr, p.document)
+
+		if err != nil {
+			return values.None, err
+		}
+
+		p.frames = arr
+	}
+
+	return p.frames.Get(idx), nil
+}
+
+func (p *HTMLPage) GetCookies(_ context.Context) (*values.Array, error) {
+	if p.cookies == nil {
+		return values.NewArray(0), nil
+	}
+
+	arr := values.NewArray(len(p.cookies))
+
+	for _, c := range p.cookies {
+		arr.Push(c)
+	}
+
+	return arr, nil
+}
+
+func (p *HTMLPage) SetCookies(_ context.Context, _ ...drivers.HTTPCookie) error {
+	return core.ErrNotSupported
+}
+
+func (p *HTMLPage) DeleteCookies(_ context.Context, _ ...drivers.HTTPCookie) error {
+	return core.ErrNotSupported
+}
+
+func (p *HTMLPage) PrintToPDF(_ context.Context, _ drivers.PDFParams) (values.Binary, error) {
+	return nil, core.ErrNotSupported
+}
+
+func (p *HTMLPage) CaptureScreenshot(_ context.Context, _ drivers.ScreenshotParams) (values.Binary, error) {
+	return nil, core.ErrNotSupported
+}
+
+func (p *HTMLPage) WaitForNavigation(_ context.Context) error {
+	return core.ErrNotSupported
+}
+
+func (p *HTMLPage) Navigate(_ context.Context, _ values.String) error {
+	return core.ErrNotSupported
+}
+
+func (p *HTMLPage) NavigateBack(_ context.Context, _ values.Int) (values.Boolean, error) {
+	return false, core.ErrNotSupported
+}
+
+func (p *HTMLPage) NavigateForward(_ context.Context, _ values.Int) (values.Boolean, error) {
+	return false, core.ErrNotSupported
+}

pkg/drivers/type.go

@@ -7,6 +7,7 @@ var (
 	HTTPCookieType   = core.NewType("HTTPCookie")
 	HTMLElementType  = core.NewType("HTMLElement")
 	HTMLDocumentType = core.NewType("HTMLDocument")
+	HTMLPageType     = core.NewType("HTMLPageType")
 )
 
 // Comparison table of builtin types
@@ -15,6 +16,7 @@ var typeComparisonTable = map[core.Type]uint64{
 	HTTPCookieType:   1,
 	HTMLElementType:  2,
 	HTMLDocumentType: 3,
+	HTMLPageType:     4,
 }
 
 func Compare(first, second core.Type) int64 {

pkg/drivers/value.go

@@ -24,9 +24,11 @@ type (
 		collections.Measurable
 		io.Closer
 
-		NodeType() values.Int
+		IsDetached() values.Boolean
 
-		NodeName() values.String
+		GetNodeType() values.Int
+
+		GetNodeName() values.String
 
 		GetChildNodes(ctx context.Context) core.Value
 
@@ -39,15 +41,17 @@ type (
 		CountBySelector(ctx context.Context, selector values.String) values.Int
 
 		ExistsBySelector(ctx context.Context, selector values.String) values.Boolean
+
+		XPath(ctx context.Context, expression values.String) (core.Value, error)
 	}
 
-	// HTMLElement is the most general base interface which most objects in a Document implement.
+	// HTMLElement is the most general base interface which most objects in a GetMainFrame implement.
 	HTMLElement interface {
 		HTMLNode
 
-		InnerText(ctx context.Context) values.String
+		GetInnerText(ctx context.Context) values.String
 
-		InnerHTML(ctx context.Context) values.String
+		GetInnerHTML(ctx context.Context) values.String
 
 		GetValue(ctx context.Context) core.Value
 
@@ -98,28 +102,20 @@ type (
 		WaitForClass(ctx context.Context, class values.String, when WaitEvent) error
 	}
 
-	// The Document interface represents any web page loaded in the browser
-	// and serves as an entry point into the web page's content, which is the DOM tree.
 	HTMLDocument interface {
 		HTMLNode
 
-		DocumentElement() HTMLElement
+		GetTitle() values.String
 
-		GetURL() core.Value
+		GetElement() HTMLElement
 
-		SetURL(ctx context.Context, url values.String) error
+		GetURL() values.String
 
-		GetCookies(ctx context.Context) (*values.Array, error)
+		GetName() values.String
 
-		SetCookies(ctx context.Context, cookies ...HTTPCookie) error
+		GetParentDocument() HTMLDocument
 
-		DeleteCookies(ctx context.Context, cookies ...HTTPCookie) error
+		GetChildDocuments(ctx context.Context) (*values.Array, error)
-
-		Navigate(ctx context.Context, url values.String) error
-
-		NavigateBack(ctx context.Context, skip values.Int) (values.Boolean, error)
-
-		NavigateForward(ctx context.Context, skip values.Int) (values.Boolean, error)
 
 		ClickBySelector(ctx context.Context, selector values.String) (values.Boolean, error)
 
@@ -129,10 +125,6 @@ type (
 
 		SelectBySelector(ctx context.Context, selector values.String, value *values.Array) (*values.Array, error)
 
-		PrintToPDF(ctx context.Context, params PDFParams) (values.Binary, error)
-
-		CaptureScreenshot(ctx context.Context, params ScreenshotParams) (values.Binary, error)
-
 		ScrollTop(ctx context.Context) error
 
 		ScrollBottom(ctx context.Context) error
@@ -145,8 +137,6 @@ type (
 
 		MoveMouseBySelector(ctx context.Context, selector values.String) error
 
-		WaitForNavigation(ctx context.Context) error
-
 		WaitForElement(ctx context.Context, selector values.String, when WaitEvent) error
 
 		WaitForAttributeBySelector(ctx context.Context, selector, name values.String, value core.Value, when WaitEvent) error
@@ -161,6 +151,45 @@ type (
 
 		WaitForClassBySelectorAll(ctx context.Context, selector, class values.String, when WaitEvent) error
 	}
+
+	// HTMLPage interface represents any web page loaded in the browser
+	// and serves as an entry point into the web page's content
+	HTMLPage interface {
+		core.Value
+		core.Iterable
+		core.Getter
+		core.Setter
+		collections.Measurable
+		io.Closer
+
+		IsClosed() values.Boolean
+
+		GetURL() values.String
+
+		GetMainFrame() HTMLDocument
+
+		GetFrames(ctx context.Context) (*values.Array, error)
+
+		GetFrame(ctx context.Context, idx values.Int) (core.Value, error)
+
+		GetCookies(ctx context.Context) (*values.Array, error)
+
+		SetCookies(ctx context.Context, cookies ...HTTPCookie) error
+
+		DeleteCookies(ctx context.Context, cookies ...HTTPCookie) error
+
+		PrintToPDF(ctx context.Context, params PDFParams) (values.Binary, error)
+
+		CaptureScreenshot(ctx context.Context, params ScreenshotParams) (values.Binary, error)
+
+		WaitForNavigation(ctx context.Context) error
+
+		Navigate(ctx context.Context, url values.String) error
+
+		NavigateBack(ctx context.Context, skip values.Int) (values.Boolean, error)
+
+		NavigateForward(ctx context.Context, skip values.Int) (values.Boolean, error)
+	}
 )
 
 const (

pkg/parser/antlr/FqlLexer.g4

@@ -86,6 +86,8 @@ FloatLiteral
     | DecimalIntegerLiteral ExponentPart?
     ;
 
+NamespaceSegment: Identifier NamespaceSeparator;
+
 // Fragments
 fragment HexDigit
     : [0-9a-fA-F]
@@ -106,3 +108,4 @@ fragment Digit
     ;
 fragment DQSring: '"' ( '\\'. | '""' | ~('"'| '\\') )* '"';
 fragment SQString: '\'' ('\\'. | '\'\'' | ~('\'' | '\\'))* '\'';
+fragment NamespaceSeparator: '::';

pkg/parser/antlr/FqlLexer.tokens

@@ -60,6 +60,7 @@ StringLiteral=59
 TemplateStringLiteral=60
 IntegerLiteral=61
 FloatLiteral=62
+NamespaceSegment=63
 ':'=5
 ';'=6
 '.'=7

pkg/parser/antlr/FqlParser.g4

@@ -207,8 +207,12 @@ expressionGroup
     : OpenParen expression CloseParen
     ;
 
+namespace
+    : (NamespaceSegment)*
+    ;
+
 functionCallExpression
-    : Identifier arguments
+    : namespace Identifier arguments
     ;
 
 arguments