8000 GitHub - daltonfury42/chromedp: Package chromedp is a faster, simpler way to drive browsers (Chrome, Edge, Safari, Android, etc) without external dependencies (ie, Selenium, PhantomJS, etc) using the Chrome Debugging Protocol.
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Package chromedp is a faster, simpler way to drive browsers (Chrome, Edge, Safari, Android, etc) without external dependencies (ie, Selenium, PhantomJS, etc) using the Chrome Debugging Protocol.

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MIT license
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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.

Installing

Install in the usual way:

go get -u github.com/chromedp/chromedp

Using

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.

// Command simple is a chromedp example demonstrating how to do a simple google // search. package main import ( "context" "fmt" "io/ioutil" "log" "time" "github.com/chromedp/cdproto/cdp" "github.com/chromedp/chromedp" ) func main() { var err error // create context ctxt, cancel := context.WithCancel(context.Background()) defer cancel() // create chrome instance c, err := chromedp.New(ctxt, chromedp.WithLog(log.Printf)) if err != nil { log.Fatal(err) } // run task list var site, res string err = c.Run(ctxt, googleSearch("site:brank.as", "Home", &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 from search result listing `%s` (%s)", res, site) } func googleSearch(q, text string, site, res *string) chromedp.Tasks { var buf []byte sel := fmt.Sprintf(`//a[text()[contains(., '%s')]]`, text) return chromedp.Tasks{ chromedp.Navigate(`https://www.google.com`), chromedp.WaitVisible(`#hplogo`, chromedp.ByID), chromedp.SendKeys(`#lst-ib`, q+"\n", chromedp.ByID), chromedp.WaitVisible(`#res`, chromedp.ByID), chromedp.Text(sel, res), chromedp.Click(sel), chromedp.WaitNotVisible(`.preloader-content`, chromedp.ByQuery), chromedp.WaitVisible(`a[href*="twitter"]`, chromedp.ByQuery), chromedp.Location(site), chromedp.ScrollIntoView(`.banner-section.third-section`, chromedp.ByQuery), chromedp.Sleep(2 * time.Second), // wait for animation to finish chromedp.Screenshot(`.banner-section.third-section`, &buf, chromedp.ByQuery), chromedp.ActionFunc(func(context.Context, cdp.Executor) error { return ioutil.WriteFile("screenshot.png", buf, 0644) }), } }

Please see the examples project for more examples. Please refer to the GoDoc API listing for a summary of the API and Actions.

Resources

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

About

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

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License

MIT license
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