godet
Remote client for Chrome DevTools
Installation
$ go get github.com/raff/godet
Documentation
http://godoc.org/github.com/raff/godet
Example
A pretty complete example is available at cmd/godet/main.go.
This example is available at examples/example.go.
import "github.com/raff/godet"
// connect to Chrome instance
remote, err := godet.Connect("localhost:9222", true)
if err != nil {
fmt.Println("cannot connect to Chrome instance:", err)
return
}
// disconnect when done
defer remote.Close()
// get browser and protocol version
version, _ := remote.Version()
fmt.Println(version)
// get list of open tabs
tabs, _ := remote.TabList("")
fmt.Println(tabs)
// install some callbacks
remote.CallbackEvent(godet.EventClosed, func(params godet.Params) {
fmt.Println("RemoteDebugger connection terminated.")
})
remote.CallbackEvent("Network.requestWillBeSent", func(params godet.Params) {
fmt.Println("requestWillBeSent",
params["type"],
params["documentURL"],
params["request"].(map[string]interface{})["url"])
})
remote.CallbackEvent("Network.responseReceived", func(params godet.Params) {
fmt.Println("responseReceived",
params["type"],
params["response"].(map[string]interface{})["url"])
})
remote.CallbackEvent("Log.entryAdded", func(params godet.Params) {
entry := params["entry"].(map[string]interface{})
fmt.Println("LOG", entry["type"], entry["level"], entry["text"])
})
// block loading of most images
_ = remote.SetBlockedURLs("*.jpg", "*.png", "*.gif")
// create new tab
tab, _ := remote.NewTab("https://www.google.com")
fmt.Println(tab)
// enable event processing
remote.RuntimeEvents(true)
remote.NetworkEvents(true)
remote.PageEvents(true)
remote.DOMEvents(true)
remote.LogEvents(true)
// navigate in existing tab
_ = remote.ActivateTab(tabs[0])
// re-enable events when changing active tab
remote.AllEvents(true) // enable all events
_, _ = remote.Navigate("https://www.google.com")
// evaluate Javascript expression in existing context
res, _ := remote.EvaluateWrap(`
console.log("hello from godet!")
return 42;
`)
fmt.Println(res)
// take a screenshot
_ = remote.SaveScreenshot("screenshot.png", 0644, 0, true)
// or save page as PDF
_ = remote.SavePDF("page.pdf", 0644)