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require 'mechanize'
require 'ostruct'
# LatestUAFetcher fetches latest user agents from `WhatIsMyBrowser.com`.
# It can use to update `Mechanize::AGENT_ALIASES`.
class LatestUAFetcher
attr_reader :user_agents
USER_AGENT_TYPES = OpenStruct.new(
linux_firefox: "Linux Firefox",
mac_firefox: "Mac Firefox",
mac_safari: "Mac Safari",
windows_chrome: "Windows Chrome",
windows_edge: "Windows Edge",
windows_firefox: "Windows Firefox",
android: "Android",
iphone: "iPhone",
ipad: "iPad",
)
BASE_URL = 'https://www.whatismybrowser.com/guides/the-latest-user-agent'
def initialize
@agent = Mechanize.new.tap { |a| a.user_agent_alias = 'Mac Firefox' }
@user_agents = {}
end
def run
return unless user_agents.empty?
sleep_time = 1
fetch_user_agents('chrome')
fetch_user_agents('firefox')
fetch_user_agents('safari')
fetch_user_agents('edge')
end
def ordered_user_agents
USER_AGENT_TYPES.to_h.values.each_with_object({}) do |type, ordered_user_agents|
ordered_user_agents[type] = user_agents[type]
end
end
private
def fetch_user_agents(browser_name, sleep_time = 1)
puts "fetch #{browser_name} UA..."
send(browser_name)
puts "sleeping... (#{sleep_time}s)"
sleep sleep_time
end
def edge
page = @agent.get("#{BASE_URL}/edge")
windows_dom = page.css("h2:contains('Latest Edge on Windows User Agents')")
@user_agents[USER_AGENT_TYPES.windows_edge] = windows_dom.css('+ .listing-of-useragents .code').first.text
end
def firefox
page = @agent.get("#{BASE_URL}/firefox")
desktop_dom = page.css("h2:contains('Latest Firefox on Desktop User Agents')")
table_dom = desktop_dom.css('+ .listing-of-useragents')
@user_agents[USER_AGENT_TYPES.linux_firefox] = table_dom.css('td:contains("Linux")').css("+ td .code:contains('Ubuntu; Linux x86_64')").text
@user_agents[USER_AGENT_TYPES.windows_firefox] = table_dom.css('td:contains("Windows")').css('+ td .code').text
@user_agents[USER_AGENT_TYPES.mac_firefox] = table_dom.css('td:contains("Macos")').css('+ td .code').text
end
def safari
page = @agent.get("#{BASE_URL}/safari")
macos_dom = page.css("h2:contains('Latest Safari on macOS User Agents')")
ios_dom = page.css("h2:contains('Latest Safari on iOS User Agents')")
@user_agents[USER_AGENT_TYPES.mac_safari] = macos_dom.css('+ .listing-of-useragents .code').first.text
@user_agents[USER_AGENT_TYPES.iphone] = ios_dom.css('+ .listing-of-useragents').css("tr:contains('Iphone') .code").text
@user_agents[USER_AGENT_TYPES.ipad] = ios_dom.css('+ .listing-of-useragents').css("tr:contains('Ipad') .code").text
end
def chrome
page = @agent.get("#{BASE_URL}/chrome")
windows_dom = page.css("h2:contains('Latest Chrome on Windows 10 User Agents')")
android_dom = page.css("h2:contains('Latest Chrome on Android User Agents')")
@user_agents[USER_AGENT_TYPES.windows_chrome] = windows_dom.css('+ .listing-of-useragents .code').first.text
@user_agents[USER_AGENT_TYPES.android] = android_dom.css('+ .listing-of-useragents .code').first.text
end
end
if $0 == __FILE__
agent = LatestUAFetcher.new
agent.run
pp agent.ordered_user_agents
end
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