Class: ESI::Tag::Invalidate

Inherits:
Base
  • Object
show all
Defined in:
lib/esi/tag/invalidate.rb

Constant Summary

Constants inherited from Base

Base::Validate

Instance Attribute Summary

Attributes inherited from Base

#attributes, #cache, #children, #closed, #name

Instance Method Summary collapse

Methods inherited from Base

create, #prepare_url_vars

Methods included from Log

#log, #log_debug, #log_error, #log_request, #msg

Constructor Details

#initialize(uri, headers, http_params, name, attrs, cache) ⇒ Invalidate

Returns a new instance of Invalidate.



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# File 'lib/esi/tag/invalidate.rb', line 10

def initialize(uri,headers,http_params,name,attrs,cache)
  super
  @buffer = ""
end

Instance Method Details

#buffer(output, inner_html) ⇒ Object 



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# File 'lib/esi/tag/invalidate.rb', line 50

def buffer( output, inner_html )
  # expects ^/<![CDATA[/
  @buffer << inner_html
end

#close(output, options = {}) ⇒ Object 



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# File 'lib/esi/tag/invalidate.rb', line 14

def close( output, options = {} )
  xml = Hpricot.XML(@buffer)

  (xml/:OBJECT).each do|object|
    selector = (object % :BASICSELECTOR)
    advanced_selector = (object % :ADVANCEDSELECTOR)
    if selector
      action = (object % :ACTION)
      info = (object % :INFO)
      uri = selector[:URI]
      remove_ttl = action[:REMOVALTTL].to_i
      @cache.keys do |key,fragment|
        if fragment.uri.match(uri)
          @cache.delete_unlocked( key )
        end
      end
    elsif advanced_selector
      # XXX: this code is untested!
      # NOTE: our support of both advanced and basic is a little off
      # we'll probably invalidate more then is normally done by the standard
      # also when we switch to memcache this will be much harder to support this flexibilty
      uri_prefix = advanced_selector[:URIPREFIX]
      uri_regex = advanced_selector[:URIEXP]
      @cache.keys do |key,data|
        if key.match(uri_prefix) and key.match(uri_regex)
          puts "invalidating #{uri}"
          # XXX: this code is untested!
          @cache.delete_unlocked( key, remove_ttl )
        end
      end
      # XXX: this code is untested!
    end
  end
  @cache.sweep!

end