Add decorator to strip session info from URLs

Following links with session information doesn't work correctly with
Ruby's open-uri, so rather than using Capybara this simply strips away
the session information.

Author: chrismytton

lib/remove_session_from_url_decorator.rb

@@ -0,0 +1,15 @@
+# frozen_string_literal: true
+require 'uri'
+
+class RemoveSessionFromUrlDecorator < Scraped::Response::Decorator
+  # Remove session information from urls
+  def body
+    noko = Nokogiri::HTML(super)
+    noko.css('a[href*="_piref"]').each do |a|
+      uri = URI.parse(a[:href])
+      uri.query = uri.query.gsub(/_piref[\d_]+\./, '')
+      a[:href] = uri.to_s
+    end
+    noko.to_s
+  end
+end