chromedp

package module
v0.0.0-...-9e9a0cf Latest Latest
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 Go to latest Published: Mar 28, 2017 License: MIT Imports: 29 Imported by: 0

README

About chromedp Build Status Coverage Status

Package chromedp is a faster, simpler way to drive browsers in Go using the Chrome Debugging Protocol (for Chrome, Edge, Safari, etc) without external dependencies (ie, Selenium, PhantomJS, etc).

NOTE: chromedp's API is currently unstable, and may change at a moments notice. There are likely extremely bad bugs lurking in this code. CAVEAT USER.

Installation

Install in the usual way:

go get -u github.com/knq/chromedp

Usage

Below is a simple Google search performed using chromedp (taken from examples/simple):

This example shows logic for a simple search for a known website, clicking on the right link, and then taking a screenshot of a specific element on the loaded page and saving that to a local file on disk.

package main

import (
	"context"
	"fmt"
	"io/ioutil"
	"log"
	"time"

	cdp "github.com/knq/chromedp"
	cdptypes "github.com/knq/chromedp/cdp"
)

func main() {
	var err error

	// create context
	ctxt, cancel := context.WithCancel(context.Background())
	defer cancel()

	// create chrome instance
	c, err := cdp.New(ctxt)
	if err != nil {
		log.Fatal(err)
	}

	// run task list
	var site, res string
	err = c.Run(ctxt, googleSearch("site:brank.as", "Easy Money Management", &site, &res))
	if err != nil {
		log.Fatal(err)
	}

	// shutdown chrome
	err = c.Shutdown(ctxt)
	if err != nil {
		log.Fatal(err)
	}

	// wait for chrome to finish
	err = c.Wait()
	if err != nil {
		log.Fatal(err)
	}

	log.Printf("saved screenshot of #testimonials from search result listing `%s` (%s)", res, site)
}

func googleSearch(q, text string, site, res *string) cdp.Tasks {
	var buf []byte
	sel := fmt.Sprintf(`//a[text()[contains(., '%s')]]`, text)
	return cdp.Tasks{
		cdp.Navigate(`https://www.google.com`),
		cdp.Sleep(2 * time.Second),
		cdp.WaitVisible(`#hplogo`, cdp.ByID),
		cdp.SendKeys(`#lst-ib`, q+"\n", cdp.ByID),
		cdp.WaitVisible(`#res`, cdp.ByID),
		cdp.Text(sel, res),
		cdp.Click(sel),
		cdp.Sleep(2 * time.Second),
		cdp.WaitVisible(`#footer`, cdp.ByQuery),
		cdp.WaitNotVisible(`div.v-middle > div.la-ball-clip-rotate`, cdp.ByQuery),
		cdp.Location(site),
		cdp.Screenshot(`#testimonials`, &buf, cdp.ByID),
		cdp.ActionFunc(func(context.Context, cdptypes.FrameHandler) error {
			return ioutil.WriteFile("testimonials.png", buf, 0644)
		}),
	}
}

Please see the examples directory for some more examples, and please refer to the GoDoc API listing for a summary of the API and Actions.

TODO

  • Move timeouts to context (defaults)
  • Implement more query selector options (allow over riding context timeouts)
  • Contextual actions for "dry run" (or via an accumulator?)
  • Network loader / manager
  • Profiler

Documentation

Overview

Package chromedp is a high level Chrome Debugging Protocol domain manager that simplifies driving web browsers (Chrome, Safari, Edge, Android Web Views, and others) for scraping, unit testing, or profiling web pages.

chromedp requires no third-party dependencies (ie, Selenium), implementing the async Chrome Debugging Protocol natively.

Index

Constants

View Source 
const (
	// DefaultNewTargetTimeout is the default time to wait for a new target to
	// be started.
	DefaultNewTargetTimeout = 3 * time.Second

	// DefaultCheckDuration is the default time to sleep between a check.
	DefaultCheckDuration = 50 * time.Millisecond

	// DefaultPoolStartPort is the default start port number.
	DefaultPoolStartPort = 9000

	// DefaultPoolEndPort is the default end port number.
	DefaultPoolEndPort = 10000
)

Variables

View Source 
var (
	// ErrInvalidDimensions is the error returned when the retrieved box model is
	// invalid.
	ErrInvalidDimensions = errors.New("invalid dimensions")

	// ErrNoResults is the error returned when there are no matching nodes.
	ErrNoResults = errors.New("no results")

	// ErrHasResults is the error returned when there should not be any
	// matching nodes.
	ErrHasResults = errors.New("has results")

	// ErrNotVisible is the error returned when a non-visible node should be
	// visible.
	ErrNotVisible = errors.New("not visible")

	// ErrVisible is the error returned when a visible node should be
	// non-visible.
	ErrVisible = errors.New("visible")

	// ErrDisabled is the error returned when a disabled node should be
	// enabled.
	ErrDisabled = errors.New("disabled")

	// ErrNotSelected is the error returned when a non-selected node should be
	// selected.
	ErrNotSelected = errors.New("not selected")

	// ErrInvalidBoxModel is the error returned when the retrieved box model
	// data is invalid.
	ErrInvalidBoxModel = errors.New("invalid box model")
)

Error types.

Functions

func ButtonLeft 

func ButtonLeft(p *input.DispatchMouseEventParams) *input.DispatchMouseEventParams

ButtonLeft is a mouse action option to set the button clicked as the left mouse button.

func ButtonMiddle 

func ButtonMiddle(p *input.DispatchMouseEventParams) *input.DispatchMouseEventParams

ButtonMiddle is a mouse action option to set the button clicked as the middle mouse button.

func ButtonNone 

func ButtonNone(p *input.DispatchMouseEventParams) *input.DispatchMouseEventParams

ButtonNone is a mouse action option to set the button clicked as none (used for mouse movements).

func ButtonRight 

func ButtonRight(p *input.DispatchMouseEventParams) *input.DispatchMouseEventParams

ButtonRight is a mouse action option to set the button clicked as the right mouse button.

func ByID 

func ByID(s *Selector)

ByID is a query option to select a single element by their CSS #id.

func ByNodeID 

func ByNodeID(s *Selector)

ByNodeID is a query option to select elements by their NodeIDs.

func ByQuery 

func ByQuery(s *Selector)

ByQuery is a query option to select a single element using DOM.querySelector.

func ByQueryAll 

func ByQueryAll(s *Selector)

ByQueryAll is a query option to select elements by DOM.querySelectorAll.

func BySearch 

func BySearch(s *Selector)

BySearch is a query option via DOM.performSearch (works with both CSS and XPath queries).

func EvalAsValue 

func EvalAsValue(p *rundom.EvaluateParams) *rundom.EvaluateParams

EvalAsValue is a evaluate option that will cause the evaluated script to encode the result of the expression as a JSON-encoded value.

func EvalIgnoreExceptions 

func EvalIgnoreExceptions(p *rundom.EvaluateParams) *rundom.EvaluateParams

EvalIgnoreExceptions is a evaluate option that will cause script evaluation to ignore exceptions.

func EvalWithCommandLineAPI 

func EvalWithCommandLineAPI(p *rundom.EvaluateParams) *rundom.EvaluateParams

EvalWithCommandLineAPI is an evaluate option to make the DevTools Command Line API available to the evaluated script.

Note: this should not be used with untrusted Javascript.

func NodeEnabled 

func NodeEnabled(s *Selector)

NodeEnabled is a query option to wait until the element is enabled.

func NodeNotPresent 

func NodeNotPresent(s *Selector)

NodeNotPresent is a query option to wait until no elements match are present matching the selector.

func NodeNotVisible 

func NodeNotVisible(s *Selector)

NodeNotVisible is a query option to wait until the element is not visible.

func NodeReady 

func NodeReady(s *Selector)

NodeReady is a query option to wait until the element is ready.

func NodeSelected 

func NodeSelected(s *Selector)

NodeSelected is a query option to wait until the element is selected.

func NodeVisible 

func NodeVisible(s *Selector)

NodeVisible is a query option to wait until the element is visible.

Types

type Action 

type Action interface {
	// Do executes the action using the provided context and frame handler.
	Do(context.Context, cdp.Handler) error
}

Action is the common interface for an action that will be executed against a context and frame handler.

func AddOnLoadScript 

func AddOnLoadScript(source string, id *page.ScriptIdentifier) Action

AddOnLoadScript adds a script to evaluate on page load.

func AttributeValue 

func AttributeValue(sel interface{}, name string, value *string, ok *bool, opts ...QueryOption) Action

AttributeValue retrieves the attribute value for the first node matching the selector.

func Attributes 

func Attributes(sel interface{}, attributes *map[string]string, opts ...QueryOption) Action

Attributes retrieves the attributes for the first node matching the selector.

func Blur 

func Blur(sel interface{}, opts ...QueryOption) Action

Blur unfocuses (blurs) the first node matching the selector.

func CaptureScreenshot 

func CaptureScreenshot(res *[]byte) Action

CaptureScreenshot captures takes a full page screenshot.

func Clear 

func Clear(sel interface{}, opts ...QueryOption) Action

Clear clears the values of any input/textarea nodes matching the selector.

func Click 

func Click(sel interface{}, opts ...QueryOption) Action

Click sends a mouse click event to the first node matching the selector.

func ComputedStyle 

func ComputedStyle(sel interface{}, style *[]*css.ComputedProperty, opts ...QueryOption) Action

ComputedStyle retrieves the computed style of the first node matching the selector.

func Dimensions 

func Dimensions(sel interface{}, model **dom.BoxModel, opts ...QueryOption) Action

Dimensions retrieves the box model dimensions for the first node matching the selector.

func DoubleClick 

func DoubleClick(sel interface{}, opts ...QueryOption) Action

DoubleClick sends a mouse double click event to the first node matching the selector.

func Evaluate 

func Evaluate(expression string, res interface{}, opts ...EvaluateOption) Action

Evaluate is an action to evaluate the Javascript expression, unmarshaling the result of the script evaluation to res.

When res is a type other than *[]byte, or **chromedp/cdp/runtime.RemoteObject, then the result of the script evaluation will be returned "by value" (ie, JSON-encoded), and subsequently an attempt will be made to json.Unmarshal the script result to res.

Otherwise, when res is a *[]byte, the raw JSON-encoded value of the script result will be placed in res. Similarly, if res is a *runtime.RemoteObject, then res will be set to the low-level protocol type, and no attempt will be made to convert the result.

Note: any exception encountered will be returned as an error.

func EvaluateAsDevTools 

func EvaluateAsDevTools(expression string, res interface{}, opts ...EvaluateOption) Action

EvaluateAsDevTools is an action that evaluates a Javascript expression as Chrome DevTools would, evaluating the expression in the "console" context, and making the Command Line API available to the script.

Note: this should not be used with untrusted Javascript.

func Focus 

func Focus(sel interface{}, opts ...QueryOption) Action

Focus focuses the first node matching the selector.

func KeyAction 

func KeyAction(keys string, opts ...KeyOption) Action

KeyAction will synthesize a keyDown, char, and keyUp event for each rune contained in keys along with any supplied key options.

Note: only well known, "printable" characters will have "char" events synthesized.

func KeyActionNode 

func KeyActionNode(n *cdp.Node, keys string, opts ...KeyOption) Action

KeyActionNode dispatches a key event on a node.

func Location 

func Location(urlstr *string) Action

Location retrieves the document location.

func MatchedStyle 

func MatchedStyle(sel interface{}, style **css.GetMatchedStylesForNodeReturns, opts ...QueryOption) Action

MatchedStyle retrieves the matched style information for the first node matching the selector.

func MouseAction 

func MouseAction(typ input.MouseType, x, y int64, opts ...MouseOption) Action

MouseAction is a mouse action.

func MouseClickNode 

func MouseClickNode(n *cdp.Node, opts ...MouseOption) Action

MouseClickNode dispatches a mouse left button click event at the center of a specified node.

Note that the window will be scrolled if the node is not within the window's viewport.

func MouseClickXY 

func MouseClickXY(x, y int64, opts ...MouseOption) Action

MouseClickXY sends a left mouse button click (ie, mousePressed and mouseReleased event) at the X, Y location. 

func Navigate(urlstr string) Action

Navigate navigates the current frame. 

func NavigateBack() Action

NavigateBack navigates the current frame backwards in its history. 

func NavigateForward() Action

NavigateForward navigates the current frame forwards in its history. 

func NavigateToHistoryEntry(entryID int64) Action

NavigateToHistoryEntry is an action to navigate to the specified navigation entry. 

func NavigationEntries(currentIndex *int64, entries *[]*page.NavigationEntry) Action

NavigationEntries is an action to retrieve the page's navigation history entries.

func NodeIDs 

func NodeIDs(sel interface{}, ids *[]cdp.NodeID, opts ...QueryOption) Action

NodeIDs retrieves the node IDs matching the selector.

func Nodes 

func Nodes(sel interface{}, nodes *[]*cdp.Node, opts ...QueryOption) Action

Nodes retrieves the document nodes matching the selector.

func Query 

func Query(sel interface{}, opts ...QueryOption) Action

Query is an action to query for document nodes match the specified sel and the supplied query options.

func QueryAfter 

func QueryAfter(sel interface{}, f func(context.Context, cdp.Handler, ...*cdp.Node) error, opts ...QueryOption) Action

QueryAfter is an action that will match the specified sel using the supplied query options, and after the visibility conditions of the query have been met, will execute f.

func Reload 

func Reload() Action

Reload reloads the current page.

func RemoveAttribute 

func RemoveAttribute(sel interface{}, name string, opts ...QueryOption) Action

RemoveAttribute removes the attribute with name from the first node matching the selector.

func RemoveOnLoadScript 

func RemoveOnLoadScript(id page.ScriptIdentifier) Action

RemoveOnLoadScript removes a script to evaluate on page load.

func Reset 

func Reset(sel interface{}, opts ...QueryOption) Action

Reset is an action that resets the form of the first node matching the selector belongs to.

func Screenshot 

func Screenshot(sel interface{}, picbuf *[]byte, opts ...QueryOption) Action

Screenshot takes a screenshot of the first node matching the selector.

func ScrollIntoView 

func ScrollIntoView(sel interface{}, opts ...QueryOption) Action

ScrollIntoView scrolls the window to the first node matching the selector.

func SendKeys 

func SendKeys(sel interface{}, v string, opts ...QueryOption) Action

SendKeys synthesizes the key up, char, and down events as needed for the runes in v, sending them to the first node matching the selector.

func SetAttributeValue 

func SetAttributeValue(sel interface{}, name, value string, opts ...QueryOption) Action

SetAttributeValue sets the attribute with name to value on the first node matching the selector.

func SetAttributes 

func SetAttributes(sel interface{}, attributes map[string]string, opts ...QueryOption) Action

SetAttributes sets the attributes for the first node matching the selector.

func SetValue 

func SetValue(sel interface{}, value string, opts ...QueryOption) Action

SetValue sets the value of an element.

func Sleep 

func Sleep(d time.Duration) Action

Sleep is an empty action that calls time.Sleep with the specified duration.

Note: this is a temporary action definition for convenience, and will likely be marked for deprecation in the future, after the remaining Actions have been able to be written/tested.

func Stop 

func Stop() Action

Stop stops all navigation and pending resource retrieval.

func Submit 

func Submit(sel interface{}, opts ...QueryOption) Action

Submit is an action that submits the form of the first node matching the selector belongs to.

func Text 

func Text(sel interface{}, text *string, opts ...QueryOption) Action

Text retrieves the visible text of the first node matching the selector.

func Title 

func Title(title *string) Action

Title retrieves the document title.

func Value 

func Value(sel interface{}, value *string, opts ...QueryOption) Action

Value retrieves the value of the first node matching the selector.

func WaitEnabled 

func WaitEnabled(sel interface{}, opts ...QueryOption) Action

WaitEnabled waits until the selected element is enabled (does not have attribute 'disabled').

func WaitNotPresent 

func WaitNotPresent(sel interface{}, opts ...QueryOption) Action

WaitNotPresent waits until no elements match the specified selector.

func WaitNotVisible 

func WaitNotVisible(sel interface{}, opts ...QueryOption) Action

WaitNotVisible waits until the selected element is not visible.

func WaitReady 

func WaitReady(sel interface{}, opts ...QueryOption) Action

WaitReady waits until the element is ready (ie, loaded by chromedp).

func WaitSelected 

func WaitSelected(sel interface{}, opts ...QueryOption) Action

WaitSelected waits until the element is selected (has attribute 'selected').

func WaitVisible 

func WaitVisible(sel interface{}, opts ...QueryOption) Action

WaitVisible waits until the selected element is visible.

type ActionFunc 

type ActionFunc func(context.Context, cdp.Handler) error

ActionFunc is a adapter to allow the use of ordinary func's as an Action.

func (ActionFunc) Do 

func (f ActionFunc) Do(ctxt context.Context, h cdp.Handler) error

Do executes the func f using the provided context and frame handler.

type CDP 

type CDP struct {
	sync.RWMutex
	// contains filtered or unexported fields
}

CDP contains information for managing a Chrome process runner, low level JSON and websocket client, and associated network, page, and DOM handling.

func New 

func New(ctxt context.Context, opts ...Option) (*CDP, error)

New creates and starts a new CDP instance.

func (*CDP) AddTarget 

func (c *CDP) AddTarget(ctxt context.Context, t client.Target)

AddTarget adds a target using the supplied context.

func (*CDP) CloseByID 

func (c *CDP) CloseByID(id string) Action

CloseByID closes the Chrome target with the specified id.

func (*CDP) CloseByIndex 

func (c *CDP) CloseByIndex(i int) Action

CloseByIndex closes the Chrome target with specified index i.

func (*CDP) GetHandlerByID 

func (c *CDP) GetHandlerByID(id string) cdp.Handler

GetHandlerByID retrieves the domains manager for the specified target ID.

func (*CDP) GetHandlerByIndex 

func (c *CDP) GetHandlerByIndex(i int) cdp.Handler

GetHandlerByIndex retrieves the domains manager for the specified index.

func (*CDP) ListTargets 

func (c *CDP) ListTargets() []string

ListTargets returns the target IDs of the managed targets.

func (*CDP) NewTarget 

func (c *CDP) NewTarget(id *string, opts ...client.Option) Action

NewTarget is an action that creates a new Chrome target, and sets it as the active target.

func (*CDP) Run 

func (c *CDP) Run(ctxt context.Context, a Action) error

Run executes the action against the current target using the supplied context.

func (*CDP) SetHandler 

func (c *CDP) SetHandler(i int) error

SetHandler sets the active handler to the target with the specified index.

func (*CDP) SetHandlerByID 

func (c *CDP) SetHandlerByID(id string) error

SetHandlerByID sets the active target to the target with the specified id.

func (*CDP) SetTarget 

func (c *CDP) SetTarget(i int) Action

SetTarget is an action that sets the active Chrome handler to the specified index i.

func (*CDP) SetTargetByID 

func (c *CDP) SetTargetByID(id string) Action

SetTargetByID is an action that sets the active Chrome handler to the handler associated with the specified id.

func (*CDP) Shutdown 

func (c *CDP) Shutdown(ctxt context.Context, opts ...client.Option) error

Shutdown closes all Chrome page handlers.

func (*CDP) Wait 

func (c *CDP) Wait() error

Wait waits for the Chrome runner to terminate.

type EvaluateOption 

type EvaluateOption func(*rundom.EvaluateParams) *rundom.EvaluateParams

EvaluateOption is the type for script evaluation options.

func EvalObjectGroup 

func EvalObjectGroup(objectGroup string) EvaluateOption

EvalObjectGroup is a evaluate option to set the object group.

type KeyOption 

type KeyOption func(*input.DispatchKeyEventParams) *input.DispatchKeyEventParams

KeyOption is a key action option.

func KeyModifiers 

func KeyModifiers(modifiers ...input.Modifier) KeyOption

KeyModifiers is a key action option to add additional modifiers on the key press.

type LogFunc 

type LogFunc func(string, ...interface{})

LogFunc is the common logging func type.

type MouseOption 

type MouseOption func(*input.DispatchMouseEventParams) *input.DispatchMouseEventParams

MouseOption is a mouse action option.

func Button 

func Button(btn string) MouseOption

Button is a mouse action option to set the button to click from a string.

func ButtonModifiers 

func ButtonModifiers(modifiers ...input.Modifier) MouseOption

ButtonModifiers is a mouse action option to add additional input modifiers for a button click.

func ButtonType 

func ButtonType(button input.ButtonType) MouseOption

ButtonType is a mouse action option to set the button to click.

func ClickCount 

func ClickCount(n int) MouseOption

ClickCount is a mouse action option to set the click count.

type Option 

type Option func(*CDP) error

Option is a Chrome Debugging Protocol option.

func WithConsolef 

func WithConsolef(f LogFunc) Option

WithConsolef is a CDP option to specify a func to receive chrome log events.

Note: NOT YET IMPLEMENTED.

func WithDebugf 

func WithDebugf(f LogFunc) Option

WithDebugf is a CDP option to specify a func to receive debug logging (ie, protocol information).

func WithErrorf 

func WithErrorf(f LogFunc) Option

WithErrorf is a CDP option to specify a func to receive error logging.

func WithLog 

func WithLog(f LogFunc) Option

WithLog is a CDP option that sets the logging, debugging, and error funcs to f.

func WithLogf 

func WithLogf(f LogFunc) Option

WithLogf is a CDP option to specify a func to receive general logging.

func WithRunner 

func WithRunner(r *runner.Runner) Option

WithRunner is a CDP option to specify the underlying Chrome runner to monitor for page handlers.

func WithRunnerOptions 

func WithRunnerOptions(opts ...runner.CommandLineOption) Option

WithRunnerOptions is a CDP option to specify the options to pass to a newly created Chrome process runner.

func WithTargets 

func WithTargets(watch <-chan client.Target) Option

WithTargets is a CDP option to specify the incoming targets to monitor for page handlers.

type Pool 

type Pool struct {
	// contains filtered or unexported fields
}

Pool manages a pool of running Chrome processes.

func NewPool 

func NewPool(opts ...PoolOption) (*Pool, error)

NewPool creates a new Chrome runner pool.

func (*Pool) Allocate 

func (p *Pool) Allocate(ctxt context.Context, opts ...runner.CommandLineOption) (*Res, error)

Allocate creates a new process runner and returns it.

func (*Pool) Shutdown 

func (p *Pool) Shutdown() error

Shutdown releases all the pool resources.

type PoolOption 

type PoolOption func(*Pool) error

PoolOption is a pool option.

func PoolLog 

func PoolLog(logf, debugf, errorf LogFunc) PoolOption

PoolLog is a pool option to set the logging to use for the pool.

func PortRange 

func PortRange(start, end int) PoolOption

PortRange is a pool option to set the port range to use.

type QueryOption 

type QueryOption func(*Selector)

QueryOption is a element query selector option.

func After 

func After(f func(context.Context, cdp.Handler, ...*cdp.Node) error) QueryOption

After is a query option to set a func that will be executed after the wait has succeeded.

func AtLeast 

func AtLeast(n int) QueryOption

AtLeast is a query option to wait until at least n elements are returned from the query selector.

func ByFunc 

func ByFunc(f func(context.Context, cdp.Handler, *cdp.Node) ([]cdp.NodeID, error)) QueryOption

ByFunc is a query option to set the func used to select elements.

func WaitFunc 

func WaitFunc(wait func(context.Context, cdp.Handler, *cdp.Node, ...cdp.NodeID) ([]*cdp.Node, error)) QueryOption

WaitFunc is a query option to set a custom wait func.

type Res 

type Res struct {
	// contains filtered or unexported fields
}

Res is a pool resource.

func (*Res) CDP 

func (r *Res) CDP() *CDP

CDP returns the actual CDP instance.

func (*Res) Port 

func (r *Res) Port() int

Port returns the allocated port for the pool resource.

func (*Res) Release 

func (r *Res) Release() error

Release releases the pool resource.

func (*Res) Run 

func (r *Res) Run(ctxt context.Context, a Action) error

Run runs an action.

func (*Res) URL 

func (r *Res) URL() string

URL returns a formatted URL for the pool resource.

type Selector 

type Selector struct {
	// contains filtered or unexported fields
}

Selector holds information pertaining to an element query select action.

func (*Selector) Do 

func (s *Selector) Do(ctxt context.Context, h cdp.Handler) error

Do satisfies the Action interface.

type TargetHandler 

type TargetHandler struct {
	sync.RWMutex
	// contains filtered or unexported fields
}

TargetHandler manages a Chrome Debugging Protocol target.

func NewTargetHandler 

func NewTargetHandler(t client.Target, logf, debugf, errorf LogFunc) (*TargetHandler, error)

NewTargetHandler creates a new handler for the specified client target.

func (*TargetHandler) Execute 

func (h *TargetHandler) Execute(ctxt context.Context, commandType cdp.MethodType, params easyjson.Marshaler, res easyjson.Unmarshaler) error

Execute executes commandType against the endpoint passed to Run, using the provided context and params, decoding the result of the command to res.

func (*TargetHandler) GetRoot 

func (h *TargetHandler) GetRoot(ctxt context.Context) (*cdp.Node, error)

GetRoot returns the current top level frame's root document node.

func (*TargetHandler) Listen 

func (h *TargetHandler) Listen(eventTypes ...cdp.MethodType) <-chan interface{}

Listen creates a listener for the specified event types.

func (*TargetHandler) Release 

func (h *TargetHandler) Release(ch <-chan interface{})

Release releases a channel returned from Listen.

func (*TargetHandler) Run 

func (h *TargetHandler) Run(ctxt context.Context) error

Run starts the processing of commands and events of the client target provided to NewTargetHandler.

Callers can stop Run by closing the passed context.

func (*TargetHandler) SetActive 

func (h *TargetHandler) SetActive(ctxt context.Context, id cdp.FrameID) error

SetActive sets the currently active frame after a successful navigation.

func (*TargetHandler) WaitFrame 

func (h *TargetHandler) WaitFrame(ctxt context.Context, id cdp.FrameID) (*cdp.Frame, error)

WaitFrame waits for a frame to be loaded using the provided context.

func (*TargetHandler) WaitNode 

func (h *TargetHandler) WaitNode(ctxt context.Context, f *cdp.Frame, id cdp.NodeID) (*cdp.Node, error)

WaitNode waits for a node to be loaded using the provided context.

type Tasks 

type Tasks []Action

Tasks is a sequential list of Actions that can be used as a single Action.

func (Tasks) Do 

func (t Tasks) Do(ctxt context.Context, h cdp.Handler) error

Do executes the list of Actions sequentially, using the provided context and frame handler.

Source Files

View all Source files

Directories

Path Synopsis
cdp
accessibility
Package accessibility provides the Chrome Debugging Protocol commands, types, and events for the Accessibility domain.
 Package accessibility provides the Chrome Debugging Protocol commands, types, and events for the Accessibility domain.
animation
Package animation provides the Chrome Debugging Protocol commands, types, and events for the Animation domain.
 Package animation provides the Chrome Debugging Protocol commands, types, and events for the Animation domain.
applicationcache
Package applicationcache provides the Chrome Debugging Protocol commands, types, and events for the ApplicationCache domain.
 Package applicationcache provides the Chrome Debugging Protocol commands, types, and events for the ApplicationCache domain.
cachestorage
Package cachestorage provides the Chrome Debugging Protocol commands, types, and events for the CacheStorage domain.
 Package cachestorage provides the Chrome Debugging Protocol commands, types, and events for the CacheStorage domain.
cdputil
css
Package css provides the Chrome Debugging Protocol commands, types, and events for the CSS domain.
 Package css provides the Chrome Debugging Protocol commands, types, and events for the CSS domain.
database
Package database provides the Chrome Debugging Protocol commands, types, and events for the Database domain.
 Package database provides the Chrome Debugging Protocol commands, types, and events for the Database domain.
debugger
Package debugger provides the Chrome Debugging Protocol commands, types, and events for the Debugger domain.
 Package debugger provides the Chrome Debugging Protocol commands, types, and events for the Debugger domain.
deviceorientation
Package deviceorientation provides the Chrome Debugging Protocol commands, types, and events for the DeviceOrientation domain.
 Package deviceorientation provides the Chrome Debugging Protocol commands, types, and events for the DeviceOrientation domain.
dom
Package dom provides the Chrome Debugging Protocol commands, types, and events for the DOM domain.
 Package dom provides the Chrome Debugging Protocol commands, types, and events for the DOM domain.
domdebugger
Package domdebugger provides the Chrome Debugging Protocol commands, types, and events for the DOMDebugger domain.
 Package domdebugger provides the Chrome Debugging Protocol commands, types, and events for the DOMDebugger domain.
domstorage
Package domstorage provides the Chrome Debugging Protocol commands, types, and events for the DOMStorage domain.
 Package domstorage provides the Chrome Debugging Protocol commands, types, and events for the DOMStorage domain.
emulation
Package emulation provides the Chrome Debugging Protocol commands, types, and events for the Emulation domain.
 Package emulation provides the Chrome Debugging Protocol commands, types, and events for the Emulation domain.
heapprofiler
Package heapprofiler provides the Chrome Debugging Protocol commands, types, and events for the HeapProfiler domain.
 Package heapprofiler provides the Chrome Debugging Protocol commands, types, and events for the HeapProfiler domain.
indexeddb
Package indexeddb provides the Chrome Debugging Protocol commands, types, and events for the IndexedDB domain.
 Package indexeddb provides the Chrome Debugging Protocol commands, types, and events for the IndexedDB domain.
input
Package input provides the Chrome Debugging Protocol commands, types, and events for the Input domain.
 Package input provides the Chrome Debugging Protocol commands, types, and events for the Input domain.
inspector
Package inspector provides the Chrome Debugging Protocol commands, types, and events for the Inspector domain.
 Package inspector provides the Chrome Debugging Protocol commands, types, and events for the Inspector domain.
io
Package io provides the Chrome Debugging Protocol commands, types, and events for the IO domain.
 Package io provides the Chrome Debugging Protocol commands, types, and events for the IO domain.
layertree
Package layertree provides the Chrome Debugging Protocol commands, types, and events for the LayerTree domain.
 Package layertree provides the Chrome Debugging Protocol commands, types, and events for the LayerTree domain.
log
Package log provides the Chrome Debugging Protocol commands, types, and events for the Log domain.
 Package log provides the Chrome Debugging Protocol commands, types, and events for the Log domain.
memory
Package memory provides the Chrome Debugging Protocol commands, types, and events for the Memory domain.
 Package memory provides the Chrome Debugging Protocol commands, types, and events for the Memory domain.
network
Package network provides the Chrome Debugging Protocol commands, types, and events for the Network domain.
 Package network provides the Chrome Debugging Protocol commands, types, and events for the Network domain.
page
Package page provides the Chrome Debugging Protocol commands, types, and events for the Page domain.
 Package page provides the Chrome Debugging Protocol commands, types, and events for the Page domain.
profiler
Package profiler provides the Chrome Debugging Protocol commands, types, and events for the Profiler domain.
 Package profiler provides the Chrome Debugging Protocol commands, types, and events for the Profiler domain.
rendering
Package rendering provides the Chrome Debugging Protocol commands, types, and events for the Rendering domain.
 Package rendering provides the Chrome Debugging Protocol commands, types, and events for the Rendering domain.
runtime
Package runtime provides the Chrome Debugging Protocol commands, types, and events for the Runtime domain.
 Package runtime provides the Chrome Debugging Protocol commands, types, and events for the Runtime domain.
schema
Package schema provides the Chrome Debugging Protocol commands, types, and events for the Schema domain.
 Package schema provides the Chrome Debugging Protocol commands, types, and events for the Schema domain.
security
Package security provides the Chrome Debugging Protocol commands, types, and events for the Security domain.
 Package security provides the Chrome Debugging Protocol commands, types, and events for the Security domain.
serviceworker
Package serviceworker provides the Chrome Debugging Protocol commands, types, and events for the ServiceWorker domain.
 Package serviceworker provides the Chrome Debugging Protocol commands, types, and events for the ServiceWorker domain.
storage
Package storage provides the Chrome Debugging Protocol commands, types, and events for the Storage domain.
 Package storage provides the Chrome Debugging Protocol commands, types, and events for the Storage domain.
systeminfo
Package systeminfo provides the Chrome Debugging Protocol commands, types, and events for the SystemInfo domain.
 Package systeminfo provides the Chrome Debugging Protocol commands, types, and events for the SystemInfo domain.
target
Package target provides the Chrome Debugging Protocol commands, types, and events for the Target domain.
 Package target provides the Chrome Debugging Protocol commands, types, and events for the Target domain.
tethering
Package tethering provides the Chrome Debugging Protocol commands, types, and events for the Tethering domain.
 Package tethering provides the Chrome Debugging Protocol commands, types, and events for the Tethering domain.
tracing
Package tracing provides the Chrome Debugging Protocol commands, types, and events for the Tracing domain.
 Package tracing provides the Chrome Debugging Protocol commands, types, and events for the Tracing domain.
Package client provides the low level Chrome Debugging Protocol JSON types and related funcs.
 Package client provides the low level Chrome Debugging Protocol JSON types and related funcs.
cmd
chromedp-gen
chromedp-gen is a tool to generate the low-level Chrome Debugging Protocol implementation types used by chromedp, based off Chrome's protocol.json.
 chromedp-gen is a tool to generate the low-level Chrome Debugging Protocol implementation types used by chromedp, based off Chrome's protocol.json.
chromedp-gen/fixup
Package fixup modifies/alters/fixes and adds to the low level type definitions for the Chrome Debugging Protocol domains, as generated from protocol.json.
 Package fixup modifies/alters/fixes and adds to the low level type definitions for the Chrome Debugging Protocol domains, as generated from protocol.json.
chromedp-gen/gen
Package gen takes the Chrome protocol domain definitions and applies the necessary code generation templates.
 Package gen takes the Chrome protocol domain definitions and applies the necessary code generation templates.
chromedp-gen/internal
Package internal contains the types and util funcs common to the chromedp-gen command.
 Package internal contains the types and util funcs common to the chromedp-gen command.
chromedp-gen/templates
Package templates contains the valyala/quicktemplate based code generation templates used by chromedp-gen.
 Package templates contains the valyala/quicktemplate based code generation templates used by chromedp-gen.
chromedp-proxy
chromedp-proxy provides a cli utility that will proxy requests from a Chrome Debugging Protocol client to a application instance.
 chromedp-proxy provides a cli utility that will proxy requests from a Chrome Debugging Protocol client to a application instance.
examples
click
edge-simple
eval
headless
keys
screenshot
simple
submit
text
visible
Package kb provides keyboard mappings for Chrome DOM Keys for use with input events.
 Package kb provides keyboard mappings for Chrome DOM Keys for use with input events.
Package runner provides a Chrome process runner.
 Package runner provides a Chrome process runner.

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