Package chromedp is a faster, simpler way to drive browsers supporting the Chrome DevTools Protocol in Go without external dependencies.
Install in the usual Go way:
$ go get -u github.com/chromedp/chromedp
Refer to the Go reference for the documentation and examples. Additionally, the examples repository contains more examples on complex actions, and other common high-level tasks such as taking full page screenshots.
I can't see any Chrome browser window
By default, Chrome is run in headless mode. See DefaultExecAllocatorOptions, and an example to override the default options.
I'm seeing “context canceled” errors
When the connection to the browser is lost, chromedp cancels the context, and it may result in this error. This occurs, for example, if the browser is closed manually, or if the browser process has been killed or otherwise terminated.
Chrome exits as soon as my Go program finishes
On Linux, chromedp is configured to avoid leaking resources by force-killing any started Chrome child processes. If you need to launch a long-running Chrome instance, manually start Chrome and connect using RemoteAllocator.
Executing an action without
Runresults in “invalid context”
By default, a chromedp context does not have an executor, however one can be specified manually if necessary; see issue #326 for an example.
I can't use an
ActionwithRunbecause it returns many values
Wrap it with an ActionFunc:
ctx, cancel := chromedp.NewContext(context.Background())
defer cancel()
chromedp.Run(ctx, chromedp.ActionFunc(func(ctx context.Context) error {
_, err := domain.SomeAction().Do(ctx)
return err
}))
I want to use chromedp on a headless environment
The simplest way is to run the Go program that uses chromedp inside the chromedp/headless-shell image. That image contains headless-shell, a smaller headless build of Chrome, which chromedp is able to find out of the box.
headless-shell - A build of headless-shell that is used for testing chromedpchromedpgithub.com/chromedp/cdproto - Go reference for the generated Chrome DevTools Protocol APIgithub.com/chromedp/pdlgen - tool used to generate cdprotogithub.com/chromedp/chromedp-proxy - a simple CDP proxy for logging CDP clients and browsers