Class: Arachnid2::Watir

Inherits:
Object
  • Object
show all
Includes:
Exoskeleton
Defined in:
lib/arachnid2/watir.rb

Constant Summary collapse

DEFAULT_AGENT = 
:desktop
DEFAULT_ORIENTATION = 
:landscape

Instance Method Summary collapse

Methods included from Exoskeleton

#bound_time, #bound_urls, #browser_type, #crawl_options, #extension_ignored?, #extract_hrefs, #in_docker?, #internal_link?, #make_absolute, #maximum_load_rate, #memory_danger?, #non_html_extensions, #preflight, #process, #proxy, #skip_link?, #timeout, #vacuum

Constructor Details

#initialize(url) ⇒ Watir

Returns a new instance of Watir.



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# File 'lib/arachnid2/watir.rb', line 8

def initialize(url)
  @url = url
  @domain = Adomain[@url]
end

Instance Method Details

#crawl(opts) ⇒ Object 



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# File 'lib/arachnid2/watir.rb', line 13

def crawl(opts)
  preflight(opts)
  watir_preflight

  until @global_queue.empty?
    @already_retried = false
    q = @global_queue.shift

    break if @global_visited.size >= crawl_options[:max_urls]
    break if Time.now > crawl_options[:time_limit]
    break if memory_danger?

    @global_visited.insert(q)

    begin
      begin
        browser.goto q
      rescue Selenium::WebDriver::Error::UnknownError => e
        # Firefox and Selenium, in their infinite wisdom
        # raise an error when a page cannot be loaded.
        # At the time of writing this, the page at
        # thewirecutter.com/cars/accessories-auto
        # causes such an issue (too many redirects).
        # This error handling moves us on from those pages.
        raise e unless e.message =~ /.*Reached error page.*/i
        next
      end
      links = process(browser.url, browser.body.html)
      next unless links

      yield browser

      vacuum(links, browser.url)
    rescue => e
      raise e if @already_retried
      raise e unless "#{e.class}".include?("Selenium") || "#{e.class}".include?("Watir")
      @browser.close if @browser rescue nil
      @headless.destroy if @headless rescue nil
      @browser = nil
      @already_retried = true
      retry
    end

  end # until @global_queue.empty?
ensure
  @browser.close if @browser rescue nil
  @headless.destroy if @headless rescue nil
end