Add post_object_restore support

lib/fog/aws/requests/storage/post_object_restore.rb

@@ -0,0 +1,54 @@
+module Fog
+  module Storage
+    class AWS
+      class Real
+
+        # Restore an object from Glacier to its original S3 path
+        #
+        # @param bucket_name [String] Name of bucket containing object
+        # @param object_name [String] Name of object to restore
+        # @option days [Integer] Number of days to restore object for. Defaults to 100000 (a very long time)
+        #
+        # @return [Excon::Response] response:
+        #   * status [Integer] 200
+        #
+        # @see http://docs.amazonwebservices.com/AmazonS3/latest/API/RESTObjectPOSTrestore.html
+        #
+        def post_object_restore(bucket_name, object_name, days = 100000)
+          unless bucket_name
+            raise ArgumentError.new('bucket_name is required')
+          end
+          unless object_name
+            raise ArgumentError.new('object_name is required')
+          end
+
+          data = '<RestoreRequest xmlns="http://s3.amazonaws.com/doc/2006-3-01"><Days>' + days.to_s + '</Days></RestoreRequest>'
+
+          headers = {}
+          headers['Content-MD5'] = Base64.encode64(Digest::MD5.digest(data)).strip
+          headers['Content-Type'] = 'application/xml'
+          headers['Date'] = Fog::Time.now.to_date_header
+
+          request({
+            :headers  => headers,
+            :host     => "#{bucket_name}.#{@host}",
+            :expect   => 202,
+            :body     => data,
+            :method   => 'POST',
+            :query    => {'restore' => nil},
+            :path     => CGI.escape(object_name)
+          })
+        end
+
+      end
+
+      class Mock # :nodoc:all
+
+        def post_object_restore(bucket_name, object_name, days = 100000)
+          raise "TODO"
+        end
+
+      end
+    end
+  end
+end

lib/fog/aws/storage.rb

@@ -33,6 +33,7 @@ module Fog
         response-content-language
         response-content-type
         response-expires
+        restore
         torrent
         uploadId
         uploads
@@ -87,6 +88,7 @@ module Fog
       request :list_multipart_uploads
       request :list_parts
       request :post_object_hidden_fields
+      request :post_object_restore
       request :put_bucket
       request :put_bucket_acl
       request :put_bucket_cors