FIX: Could not download exported data on some sites

app/models/topic_link_click.rb

@@ -31,6 +31,12 @@ class TopicLinkClick < ActiveRecord::Base
     unless link.present?
       return args[:url] if args[:url] =~ /^\//
 
+      begin
+        uri = URI.parse(args[:url])
+        return args[:url] if uri.host == URI.parse(Discourse.base_url).host
+      rescue
+      end
+
       # If we have it somewhere else on the site, just allow the redirect. This is
       # likely due to a onebox of another topic.
       link = TopicLink.find_by(url: args[:url])