3 files changed, 9 insertions, 1 deletions
diff --git a/lib/paperclip/attachment_extensions.rb b/lib/paperclip/attachment_extensions.rb
index 93df0a326..752e79e65 100644
--- a/lib/paperclip/attachment_extensions.rb
+++ b/lib/paperclip/attachment_extensions.rb
@@ -35,6 +35,10 @@ module Paperclip
 
       formats.include?(other_extension.delete('.')) && File.basename(other_filename, other_extension) == File.basename(original_filename, File.extname(original_filename))
     end
+
+    def default_url(style_name = default_style)
+      @url_generator.for_as_default(style_name)
+    end
   end
 end
 
diff --git a/lib/paperclip/response_with_limit_adapter.rb b/lib/paperclip/response_with_limit_adapter.rb
index 8711b1349..17a2abd25 100644
--- a/lib/paperclip/response_with_limit_adapter.rb
+++ b/lib/paperclip/response_with_limit_adapter.rb
@@ -16,7 +16,7 @@ module Paperclip
     private
 
     def cache_current_values
-      @original_filename = filename_from_content_disposition || filename_from_path || 'data'
+      @original_filename = filename_from_content_disposition.presence || filename_from_path.presence || 'data'
       @size = @target.response.content_length
       @tempfile = copy_to_tempfile(@target)
       @content_type = ContentTypeDetector.new(@tempfile.path).detect
diff --git a/lib/paperclip/url_generator_extensions.rb b/lib/paperclip/url_generator_extensions.rb
index 1079efdbc..e1d6df2c2 100644
--- a/lib/paperclip/url_generator_extensions.rb
+++ b/lib/paperclip/url_generator_extensions.rb
@@ -11,6 +11,10 @@ module Paperclip
         Addressable::URI.parse(url).normalize.to_str.gsub(escape_regex) { |m| "%#{m.ord.to_s(16).upcase}" }
       end
     end
+
+    def for_as_default(style_name)
+      attachment_options[:interpolator].interpolate(default_url, @attachment, style_name)
+    end
   end
 end