Class Rack::ConditionalGet In: lib/rack/conditionalget.rb
Parent: Object  Middleware that enables conditional GET using
If-None-Match and If-Modified-Since. The application should set
either or both of the Last-Modified or Etag response headers
according to RFC 2616. When either of the conditions is met, the
response body is set to be zero length and the response status
is set to 304 Not Modified.  Applications that defer response
body generation until the body‘s each message is received will
avoid response body generation completely when a conditional GET
matches.  Adapted from Michael Klishin‘s Merb implementation:
call   new    Public Class methods  Public Instance methods