This works on http but not https

    @http.route('/client_crm/access/', auth='user') 
    def index(self, **kw):
         cr, uid, context, registry = request.cr, request.uid, request.context, request.registry
         mdl_wac = registry.get('wrapper_allclients.wrapper_allclients');
         url = mdl_wac.allclients_user_url(cr, uid)
         return werkzeug.utils.redirect(url)

So this controller does a redirect to an external url.  I have an apache proxy setup for both 80 and 443.  Everything else Odoo works on both ports but this.  The behavior is this:

On http:
redirects to https://external.url.com/path?querystring

On https:

redirects to https://odoo.url.com/path?querystring

So the path and query string are correct but for some reason when on https it removes the domain and replaces with odoo domain.