Ref #177 Passive detection of specific plugins (Dirty work)

lib/common/collections/wp_plugins/detectable.rb

@@ -13,5 +13,62 @@ class WpPlugins < WpItems
       '//plugin'
     end
 
+    # @param [ WpTarget ] wp_target
+    # @param [ Hash ] options
+    #
+    # @return [ WpPlugins ]
+    def passive_detection(wp_target, options = {})
+      detected = super(wp_target, options)
+
+      detected += from_header(wp_target)
+      detected += from_content(wp_target)
+
+      detected.sort.uniq!
+      detected
+    end
+
+    protected
+
+    # X-Powered-By: W3 Total Cache/0.9.2.5
+    # @param [ Typhoeus::Response ] response
+    #
+    # @return [ WpPlugins ]
+    def from_header(wp_target)
+      wp_plugins = WpPlugins.new
+      response   = Browser.get(wp_target.url)
+
+      if response.headers && powered_by = response.headers[:x_powered_by]
+        if powered_by =~ /W3 Total Cache\/([^0-9.]+)/i
+          wp_plugins << WpPlugin.new(
+            wp_target.uri,
+            self.item_options(wp_target).merge(name: 'w3-total-cache', version: $1)
+          )
+        end
+      end
+      wp_plugins
+    end
+
+    # <!-- Cached page generated by WP-Super-Cache on 2013-05-03 14:46:37 -->
+    # <!-- Performance optimized by W3 Total Cache.
+    # @param [ Typhoeus::Response ] response
+    #
+    # @return [ WpPlugins ]
+    def from_content(wp_target)
+      body       = Browser.get(wp_target.url).body
+      wp_plugins = WpPlugins.new
+      options    = self.item_options(wp_target)
+
+      if body =~ /wp-super-cache/i
+        wp_plugins << WpPlugin.new(wp_target.uri, options.merge(name: 'wp-super-cache'))
+      end
+
+      if body =~ /w3 total cache/i
+        wp_plugins << WpPlugin.new(wp_target.uri, options.merge(name: 'w3-total-cache'))
+      end
+
+      wp_plugins.uniq!
+      wp_plugins
+    end
+
   end
 end