Adds passive WP version detection from stylesheets. Fix #478 - Ref #750

lib/common/models/wp_version.rb

@@ -23,4 +23,11 @@ class WpVersion < WpItem
     number == other.number
   end
 
+  # @return [ Array<String> ] All the stable versions from version_file
+  def self.all(versions_file = WP_VERSIONS_FILE)
+    Nokogiri.XML(File.open(versions_file)).css('version').reduce([]) do |a, node|
+      a << node.text.to_s
+    end
+  end
+
 end

lib/common/models/wp_version/findable.rb

@@ -114,6 +114,33 @@ class WpVersion < WpItem
       )
     end
 
+    def find_from_stylesheets_numbers(target_uri)
+      wp_versions = WpVersion.all
+      found       = {}
+      pattern     = /ver=([0-9\.]+)/i
+
+      Nokogiri::HTML(Browser.get(target_uri.to_s).body).css('link,script').each do |tag|
+        %w(herf src).each do |attribute|
+          attr_value = tag.attribute(attribute).to_s
+
+          next if attr_value.nil? || attr_value.empty?
+
+          uri = Addressable::URI.parse(attr_value)
+          next unless uri.query && uri.query.match(pattern)
+
+          version = Regexp.last_match[1].to_s
+
+          found[version] ||= 0
+          found[version] += 1
+        end
+      end
+
+      found.delete_if { |v, _| !wp_versions.include?(v) }
+
+      best_guess = found.sort_by(&:last).last
+      best_guess ? best_guess[0] : nil
+    end
+
     # Uses data/wp_versions.xml to try to identify a
     # wordpress version.
     #

spec/lib/common/models/wp_version_spec.rb

@@ -29,4 +29,12 @@ describe WpVersion do
     end
   end
 
+  describe '#all' do
+    let(:versions_file) { File.join(MODELS_FIXTURES, 'wp_version', 'findable', 'advanced_fingerprinting', 'wp_versions.xml') }
+
+    it 'returns the array containign the two versions' do
+      expect(WpVersion.all(versions_file)).to eq ['3.2.1', '3.2']
+    end
+  end
+
 end