module CanonicalURL module ControllerExtensions def canonical_url(url_for_options = {}) case url_for_options when Hash @canonical_url = url_for(url_for_options) else @canonical_url = url_for_options end end end module Helpers def canonical_link_tag(url = nil) return '' unless url || @canonical_url tag('link', :rel => 'canonical', :href => url || @canonical_url || request.url) end end end # https://github.com/mbleigh/canonical-url/blob/master/lib/canonical_url.rb # Copyright (c) 2009 Michael Bleigh and Intridea, Inc. # # Permission is hereby granted, free of charge, to any person obtaining # a copy of this software and associated documentation files (the # "Software"), to deal in the Software without restriction, including # without limitation the rights to use, copy, modify, merge, publish, # distribute, sublicense, and/or sell copies of the Software, and to # permit persons to whom the Software is furnished to do so, subject to # the following conditions: # # The above copyright notice and this permission notice shall be # included in all copies or substantial portions of the Software. # # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, # EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF # MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND # NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE # LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION # OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION # WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.#