Don't authorize! until we know the digital file exists

app/controllers/spree/digitals_controller.rb

@@ -1,16 +1,25 @@
 module Spree
   class DigitalsController < Spree::BaseController
-  
     ssl_required :show
   
     def show
       link = DigitalLink.find_by_secret(params[:secret])
+
       if link.present? and link.digital.attachment.present?
         attachment = link.digital.attachment
-        if link.authorize! and File.file?(attachment.path)
-          send_file attachment.path, :filename => attachment.original_filename, :type => attachment.content_type and return
+
+        # don't authorize the link unless the file exists
+        # the logger error will help track down customer issues easier
+
+        if File.file?(attachment.path)
+          if link.authorize!
+            send_file attachment.path, :filename => attachment.original_filename, :type => attachment.content_type and return
+          end
+        else
+          Rails.logger.error "Missing Digital Item: #{attachment.path}"
         end
       end
+      
       render :unauthorized
     end