1 files changed, 29 insertions, 0 deletions
diff --git a/actionpack/lib/action_dispatch/vendor/rack-1.1.pre/rack/content_length.rb b/actionpack/lib/action_dispatch/vendor/rack-1.1.pre/rack/content_length.rb
new file mode 100644
index 0000000000..1e56d43853
--- /dev/null
+++ b/actionpack/lib/action_dispatch/vendor/rack-1.1.pre/rack/content_length.rb
@@ -0,0 +1,29 @@
+require 'rack/utils'
+
+module Rack
+  # Sets the Content-Length header on responses with fixed-length bodies.
+  class ContentLength
+    include Rack::Utils
+
+    def initialize(app)
+      @app = app
+    end
+
+    def call(env)
+      status, headers, body = @app.call(env)
+      headers = HeaderHash.new(headers)
+
+      if !STATUS_WITH_NO_ENTITY_BODY.include?(status) &&
+         !headers['Content-Length'] &&
+         !headers['Transfer-Encoding'] &&
+         (body.respond_to?(:to_ary) || body.respond_to?(:to_str))
+
+        body = [body] if body.respond_to?(:to_str) # rack 0.4 compat
+        length = body.to_ary.inject(0) { |len, part| len + bytesize(part) }
+        headers['Content-Length'] = length.to_s
+      end
+
+      [status, headers, body]
+    end
+  end
+end