Ruby Selenium with Proxy

ruby_selenium_with_proxy.rb

# Obs: Work only in Firefox 66.x or prior, because the function "driver.switch_to.alert.send_keys" not work in new versions.
# tested in selenium-webdriver (3.142.7), webdrivers (4.6.0) and firefox (66.0.5)

# Download firefox to folder
# config/initializers/selenium.rb
Selenium::WebDriver::Firefox::Binary.path = 'path/to/firefox/66.x'

# -----------------------------------------------------------------------------------------------------
# Code

def your_code
  proxy = {
    addr: 'PROXY_ADDR',
    port: 'PROXY_PORT',
    user: 'PROXY_USER',
    pass: 'PROXY_PASS',
  }

  driver = selenium_driver(proxy)

  driver.navigate.to('https://api.myip.com')

  puts driver.source_page
end

def selenium_driver(proxy)
  profile = Selenium::WebDriver::Firefox::Profile.new
  profile['network.proxy.type'] = 1
  profile['network.proxy.http'] = proxy[:addr]
  profile['network.proxy.http_port'] = proxy[:port].to_i
  profile['network.proxy.ssl'] = proxy[:addr]
  profile['network.proxy.ssl_port'] = proxy[:port].to_i

  options = Selenium::WebDriver::Firefox::Options.new
  options.profile = profile
  options.add_argument('--headless') # optional
  options.add_argument('--safe-mode') # optional
  options.add_argument(
    '--user-agent=Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/60.0.3112.50 Safari/537.36'
  ) # optional

  driver = Selenium::WebDriver.for(:firefox, options: options)

  # fill modal proxy auth.
  sleep 3 # Necessary because prompt can delay to show.
  driver.switch_to.alert.send_keys(
    "#{proxy[:user]}#{Selenium::WebDriver::Keys::KEYS[:tab]}#{proxy[:pass]}"
  )
  driver.switch_to.alert.accept

  driver
end