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Module: ActionDispatch::Http::Cache::Request

Constant Summary

Class Attribute Summary

Instance Attribute Summary

Instance Method Summary

Class Attribute Details

.strict_freshness (rw) Also known as: #strict_freshness

[ GitHub ] 

  


# File 'actionpack/lib/action_dispatch/http/cache.rb', line 12



mattr_accessor :strict_freshness, default: false


  







Instance Attribute Details



  

    #strict_freshness   (rw)
  

  [ GitHub ]


  

  


# File 'actionpack/lib/action_dispatch/http/cache.rb', line 12



mattr_accessor :strict_freshness, default: false


  







Instance Method Details



  

    #etag_matches?(etag)  ⇒ Boolean 
  



  

    
  





  


  [ GitHub ]


  

  


# File 'actionpack/lib/action_dispatch/http/cache.rb', line 32



def etag_matches?(etag)
  if etag
    validators = if_none_match_etags
    validators.include?(etag) || validators.include?("*")
  end
end


  








  

    #fresh?(response)  ⇒ Boolean 
  



  

    

Check response freshness (‘Last-Modified` and ETag) against request If-Modified-Since and If-None-Match conditions. If both headers are supplied, based on configuration, either ETag is preferred over Last-Modified or both are considered equally. You can adjust the preference with config.action_dispatch.strict_freshness. Reference: tools.ietf.org/html/rfc7232#section-6


  





  


  [ GitHub ]


  

  


# File 'actionpack/lib/action_dispatch/http/cache.rb', line 45



def fresh?(response)
  if Request.strict_freshness
    if if_none_match
      etag_matches?(response.etag)
    elsif if_modified_since
      not_modified?(response.last_modified)
    else
      false
    end
  else
    last_modified = if_modified_since
    etag          = if_none_match

    return false unless last_modified || etag

    success = true
    success &&= not_modified?(response.last_modified) if last_modified
    success &&= etag_matches?(response.etag) if etag
    success
  end
end


  








  

    #if_modified_since  
  

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# File 'actionpack/lib/action_dispatch/http/cache.rb', line 14



def if_modified_since
  if since = get_header(HTTP_IF_MODIFIED_SINCE)
    Time.rfc2822(since) rescue nil
  end
end


  








  

    #if_none_match  
  

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# File 'actionpack/lib/action_dispatch/http/cache.rb', line 20



def if_none_match
  get_header HTTP_IF_NONE_MATCH
end


  








  

    #if_none_match_etags  
  

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# File 'actionpack/lib/action_dispatch/http/cache.rb', line 24



def if_none_match_etags
  if_none_match ? if_none_match.split(",").each(&:strip!) : []
end


  








  

    #not_modified?(modified_at)  ⇒ Boolean 
  



  

    
  





  


  [ GitHub ]


  

  


# File 'actionpack/lib/action_dispatch/http/cache.rb', line 28



def not_modified?(modified_at)
  if_modified_since && modified_at && if_modified_since >= modified_at
end