gg_chrome

README

Chrome

Utility based on chromedp package.

$ go get -u github.com/chromedp/chromedp

See here for examples: https://github.com/chromedp/examples

Google Chrome Headless

On a Server without a GUI you have to use Google Chrome in headless mode.

https://askubuntu.com/questions/245041/how-do-i-install-chrome-on-a-server

To install Google Chrome:

Step-1: First, add (if not added already) the Google Chrome repository on your system using the following command. While using PPA to our system we also receive the latest updates whenever you check for system updates.

$ wget -q -O - https://dl-ssl.google.com/linux/linux_signing_key.pub | sudo apt-key add - 

Now add the PPA url to the /etc/apt/sources.list.d/google.list file as per Ubuntu system architecture.

$ sudo sh -c 'echo "deb [arch=amd64] http://dl.google.com/linux/chrome/deb/ stable main" >> /etc/apt/sources.list.d/google.list'

Step-2: Install or Upgrade Google Chrome

After adding Google Chrome repository in our system use following commands to install the latest Google Chrome stable release. If you already have installed an older version, It will upgrade currently installed version with recent stable version.

$ sudo apt-get update
$ sudo apt-get install google-chrome-stable

Step-3: Verify version

$ google-chrome --version

Optional "In Memory" renderer

Chrome should not need Xvfb

#install Xvfb
sudo apt-get install xvfb

#set display number to :99
Xvfb :99 -ac &
export DISPLAY=:99

#you are now having an X display by Xvfb

Alternative package

https://github.com/go-rod/rod

Rod is similar to Chromedp and may be a good alternative

Documentation

Index

• type ChromeHelper
  • func NewChromePuppet(args ...interface{}) (instance *ChromeHelper, err error)
  • func (instance *ChromeHelper) ElementScreenshot(url string, sel string) (response []byte, err error)
  • func (instance *ChromeHelper) Eval(url string, script string) (response interface{}, err error)
  • func (instance *ChromeHelper) FullScreenshot(url string) (response []byte, err error)
  • func (instance *ChromeHelper) GetWindowVariable(url string, variable string) (response interface{}, err error)
  • func (instance *ChromeHelper) Screenshot(url string) (response []byte, err error)
  • func (instance *ChromeHelper) Test() (err error)
  • func (instance *ChromeHelper) ToPDF(url string) (response []byte, err error)

Types

type ChromeHelper

type ChromeHelper struct {
}

var Chrome *ChromeHelper

func NewChromePuppet

func NewChromePuppet(args ...interface{}) (instance *ChromeHelper, err error)

func (*ChromeHelper) ElementScreenshot

func (instance *ChromeHelper) ElementScreenshot(url string, sel string) (response []byte, err error)

func (*ChromeHelper) Eval

func (instance *ChromeHelper) Eval(url string, script string) (response interface{}, err error)

func (*ChromeHelper) FullScreenshot

func (instance *ChromeHelper) FullScreenshot(url string) (response []byte, err error)

func (*ChromeHelper) GetWindowVariable

func (instance *ChromeHelper) GetWindowVariable(url string, variable string) (response interface{}, err error)

func (*ChromeHelper) Screenshot

func (instance *ChromeHelper) Screenshot(url string) (response []byte, err error)

func (*ChromeHelper) Test

func (instance *ChromeHelper) Test() (err error)

func (*ChromeHelper) ToPDF

func (instance *ChromeHelper) ToPDF(url string) (response []byte, err error)