@inject(config=Config)<EOL>def append_crossdomain(response, config):<EOL>
<EOL>if '<STR_LIT>' in response.headers:<EOL><INDENT>return<EOL><DEDENT>CrossdomainWebTaskResponder().respond(response)<EOL>
Adds the default crossdomain headers.
Uses the :class:`zsl.task.task_decorator.CrossdomainWebTaskResponder`
to generate the headers.

:param response: Current web response.
:param config:  Current configuration.