def retrieve_diaspora_host_meta(host):
document, code, exception = fetch_document(host=host, path="<STR_LIT>")<EOL>if exception:<EOL><INDENT>return None<EOL><DEDENT>xrd = XRD.parse_xrd(document)<EOL>return xrd<EOL>
Retrieve a remote Diaspora host-meta document.

:arg host: Host to retrieve from
:returns: ``XRD`` instance