freedom patches for fixes submitted to rack

lib/freedom_patches/rack_patches.rb

@@ -0,0 +1,42 @@
+# patch https://github.com/rack/rack/pull/600
+#
+class Rack::ETag
+  private
+
+   def digest_body(body)
+    parts = []
+    has_body = false
+
+    body.each do |part|
+      parts << part
+      has_body ||= part.length > 0
+    end
+
+    hexdigest =
+      if has_body
+        digest = Digest::MD5.new
+        parts.each { |part| digest << part }
+        digest.hexdigest
+      end
+
+    [hexdigest, parts]
+  end
+end
+
+# patch https://github.com/rack/rack/pull/596
+#
+class Rack::ConditionalGet
+  private
+   def to_rfc2822(since)
+    # shortest possible valid date is the obsolete: 1 Nov 97 09:55 A
+    # anything shorter is invalid, this avoids exceptions for common cases
+    # most common being the empty string
+    if since && since.length >= 16
+      # NOTE: there is no trivial way to write this in a non execption way
+      #   _rfc2822 returns a hash but is not that usable
+      Time.rfc2822(since) rescue nil
+    else
+      nil
+    end
+  end
+end