targets.go

package main

import (
	"context"
	"fmt"

	"github.com/mafredri/cdp"
	"github.com/mafredri/cdp/devtool"
	"github.com/mafredri/cdp/protocol/target"
	"github.com/mafredri/cdp/rpcc"
)

func main() {
	// Create a DevTools
	dt := devtool.New(fmt.Sprintf("http://%s:%d", "localhost", 9222))
	// Create a fresh Page target
	_target, err := dt.Get(context.Background(), devtool.Page)

	if err != nil {
		// If there was no page context, create a new one
		_target, err = dt.Create(context.Background())
		if err != nil {
			panic(err)
		}
	}
	// Initiate a new RPC connection to the Chrome Debugging Protocol target.
	conn, err := rpcc.DialContext(context.Background(), _target.WebSocketDebuggerURL, rpcc.WithWriteBufferSize(104857586))
	if err != nil {
		panic(err)
	}

	// Create a client
	client := cdp.NewClient(conn)

	// Should be 1 target, which has Attached = true
	targets, err := client.Target.GetTargets(context.Background())
	fmt.Println("---------------- INITIAL SET OF TARGETS ---------------------")
	fmt.Printf("%+v %v\n", targets, err)
	fmt.Println("")

	origTarget := targets.TargetInfos[0]
	client.Target.DetachFromTarget(context.Background(), target.NewDetachFromTargetArgs().SetTargetID(origTarget.TargetID))

	// Should be 1 target, which we expect to have Attached = false, but will
	// still be true even though we detached from it
	fmt.Println("---------------- TARGETS AFTER DETACHING --------------------")
	targets, err = client.Target.GetTargets(context.Background())
	fmt.Printf("%+v %v\n", targets, err)
	fmt.Println("")

	createTargetReply, err := client.Target.CreateTarget(context.Background(), target.NewCreateTargetArgs("https://www.google.com"))
	if err != nil {
		panic(err)
	}

	// Should now be 2 targets, including the one whose ID is returned by CreateTarget
	fmt.Println("---------------- TARGETS AFTER CREATING NEW TARGET ----------")
	targets, err = client.Target.GetTargets(context.Background())
	fmt.Printf("%+v %v\n", targets, err)
	fmt.Printf("%+v\n", createTargetReply)
	fmt.Println("")

	err = client.Target.ActivateTarget(context.Background(), target.NewActivateTargetArgs(createTargetReply.TargetID))
	if err != nil {
		panic(err)
	}

	fmt.Println("---------------- TARGETS AFTER ACTIVATING THE CREATED TARGET --")
	targets, err = client.Target.GetTargets(context.Background())
	fmt.Printf("%+v %v\n", targets, err)
	fmt.Println("")
}