It is Ruby clean and high-level API to Chrome. Runs headless by default, but you can configure it to run in a headful mode. All you need is Ruby and Chrome or Chromium. Ferrum connects to the browser by CDP protocol and there's no Selenium/WebDriver/ChromeDriver dependency. The emphasis was made on a raw CDP protocol because Chrome allows you to do so many things that are barely supported by WebDriver because it should have consistent design with other browsers.
- Cuprite is a pure Ruby driver forCapybara based on Ferrum.
- Vessel high-level web crawling framework based on Ferrum and Mechanize.
There's no official Chrome or Chromium package for Linux don't install it this
way because it's either outdated or unofficial, both are bad. Download it from
official source for Chrome or Chromium.
Chrome binary should be in the PATH or BROWSER_PATH and you can pass it as an
option to browser instance see :browser_path in
Customization.
Add this to your Gemfile and run bundle install.
gem "ferrum"
Navigate to a website and save a screenshot:
browser = Ferrum::Browser.new browser.go_to("https://google.com") browser.screenshot(path: "google.png") browser.quit
When you work with browser instance Ferrum creates and maintains a default page for you, in fact all the methods above
are sent to the page instance that is created in the default_context of the browser instance. You can interact
with a page created manually and this is preferred:
browser = Ferrum::Browser.new page = browser.create_page page.go_to("https://google.com") input = page.at_xpath("//input[@name='q']") input.focus.type("Ruby headless driver for Chrome", :Enter) page.at_css("a > h3").text # => "rubycdp/ferrum: Ruby Chrome/Chromium driver - GitHub" browser.quit
Evaluate some JavaScript and get full width/height:
browser = Ferrum::Browser.new page = browser.create_page page.go_to("https://www.google.com/search?q=Ruby+headless+driver+for+Capybara") width, height = page.evaluate <<~JS [document.documentElement.offsetWidth, document.documentElement.offsetHeight] JS # => [1024, 1931] browser.quit
Do any mouse movements you like:
# Trace a 100x100 square browser = Ferrum::Browser.new page = browser.create_page page.go_to("https://google.com") page.mouse .move(x: 0, y: 0) .down .move(x: 0, y: 100) .move(x: 100, y: 100) .move(x: 100, y: 0) .move(x: 0, y: 0) .up browser.quit
After checking out the repo, run bundle install to install dependencies.
Then, run bundle exec rake test to run the tests. You can also run bin/console for an interactive prompt that will
allow you to experiment.
To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the
version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version,
push git commits and the created tag, and push the .gem file to rubygems.org.
Bug reports and pull requests are welcome on GitHub.
The gem is available as open source under the terms of the MIT License.