def __call__(self, environ, start_response):
req = Request(environ)
new_req = req.copy_get()
resp = orig_resp = req.get_response(self.app, catch_exc_info=True)
if resp.status_int in self.errors and \
'pylons.status_code_redirect' not in environ and self.error_path:
new_req.path_info = self.error_path
new_req.environ['pylons.original_response'] = resp
new_req.environ['pylons.original_request'] = req
resp = new_req.get_response(self.app, catch_exc_info=True)
resp.status = orig_resp.status
return resp(environ, start_response)
