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-rw-r--r--lib/rack.rb10
1 files changed, 10 insertions, 0 deletions
diff --git a/lib/rack.rb b/lib/rack.rb
index 341514c5..97817bcb 100644
--- a/lib/rack.rb
+++ b/lib/rack.rb
@@ -22,6 +22,16 @@ module Rack
   def self.release
     "1.5"
   end
+  PATH_INFO      = 'PATH_INFO'.freeze
+  REQUEST_METHOD = 'REQUEST_METHOD'.freeze
+  SCRIPT_NAME    = 'SCRIPT_NAME'.freeze
+  QUERY_STRING   = 'QUERY_STRING'.freeze
+  CACHE_CONTROL  = 'Cache-Control'.freeze
+  CONTENT_LENGTH = 'Content-Length'.freeze
+  CONTENT_TYPE   = 'Content-Type'.freeze
+
+  GET  = 'GET'.freeze
+  HEAD = 'HEAD'.freeze
 
   autoload :Builder, "rack/builder"
   autoload :BodyProxy, "rack/body_proxy"