Class: Rack::Rewritten::Canonical

Inherits:
Object
  • Object
show all
Defined in:
lib/rack/canonical.rb

Instance Method Summary collapse

Constructor Details

#initialize(app) ⇒ Canonical

Returns a new instance of Canonical.



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# File 'lib/rack/canonical.rb', line 6

def initialize(app)
  @app = app
end

Instance Method Details

#call(env) ⇒ Object 



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# File 'lib/rack/canonical.rb', line 10

def call(env)
  req = Rack::Request.new(env)

  status, headers, response = @app.call(req.env)

  if status == 200 && headers['Content-Type'] =~ /text\/html|application\/xhtml\+xml/
    body = ''
    response.each { |part| body << part }
    index = body.rindex('</head>')
    if index
      # go with a request duplicate since infinitive works on translations
      target_req = req.dup
      target_req.path_info = ::Rewritten.infinitive(::Rewritten.get_current_translation(req.path))
      target_req.env['QUERY_STRING'] = ''
      target = target_req.url

      body.insert(index, %(<link rel="canonical" href="#{target}"/>))
      headers['Content-Length'] = body.length.to_s
      response = [body]
    end

  end
  [status, headers, response]
end