FIX: file helper to download file using chunks of 512KB

lib/file_helper.rb

@@ -15,11 +15,11 @@ class FileHelper
 
     File.open(tmp.path, "wb") do |f|
       downloaded = uri.open("rb", read_timeout: 5, redirect: follow_redirect)
-      while f.size <= max_file_size && data = downloaded.read(max_file_size)
+      while f.size <= max_file_size && data = downloaded.read(512.kilobytes)
         f.write(data)
       end
       # tiny files are StringIO, no close! on them
-      downloaded.close! if downloaded.respond_to? :close!
+      downloaded.try(:close!) rescue nil
     end
 
     tmp