lib/carrierwave/uploader/cache.rb in carrierwave-0.5.2 vs lib/carrierwave/uploader/cache.rb in carrierwave-0.5.3

@@ -62,10 +62,23 @@
       def cached?
         @cache_id
       end
 
       ##
+      # Caches the remotely stored file
+      #
+      # This is useful when about to process images. Most processing solutions
+      # require the file to be stored on the local filesystem.
+      #
+      def cache_stored_file!
+        sanitized = SanitizedFile.new :tempfile => StringIO.new(file.read),
+          :filename => File.basename(path), :content_type => file.content_type
+
+        cache! sanitized
+      end
+
+      ##
       # Returns a String which uniquely identifies the currently cached file for later retrieval
       #
       # === Returns
       #
       # [String] a cache name, in the format YYYYMMDD-HHMM-PID-RND/filename.txt
@@ -85,12 +98,13 @@
       #
       # [CarrierWave::FormNotMultipart] if the assigned parameter is a string
       #
       def cache!(new_file)
         new_file = CarrierWave::SanitizedFile.new(new_file)
-        raise CarrierWave::FormNotMultipart if new_file.is_path? && ensure_multipart_form
 
         unless new_file.empty?
+          raise CarrierWave::FormNotMultipart if new_file.is_path? && ensure_multipart_form
+
           with_callbacks(:cache, new_file) do
             self.cache_id = CarrierWave.generate_cache_id unless cache_id
 
             @filename = new_file.filename
             self.original_filename = new_file.filename