def fromXRDS(cls, uri, xrds):
"""Parse the given document as XRDS looking for OpenID services.
@rtype: [OpenIDServiceEndpoint]
@raises XRDSError: When the XRDS does not parse.
@since: 2.1.0
"""
return extractServices(uri, xrds, cls)
def discoverYadis(uri):
"""Discover OpenID services for a URI. Tries Yadis and falls back
on old-style <link rel='...'> discovery if Yadis fails.
@param uri: normalized identity URL
@type uri: str
@return: (claimed_id, services)
@rtype: (str, list(OpenIDServiceEndpoint))
@raises: DiscoveryFailure
"""
# Might raise a yadis.discover.DiscoveryFailure if no document
# came back for that URI at all. I don't think falling back
# to OpenID 1.0 discovery on the same URL will help, so don't
# bother to catch it.
response = yadisDiscover(uri)
yadis_url = response.normalized_uri
try:
openid_services = extractServices(
response.normalized_uri, response.response_text,
OpenIDServiceEndpoint)
except XRDSError:
# Does not parse as a Yadis XRDS file
openid_services = []
if not openid_services:
# Either not an XRDS or there are no OpenID services.
if response.isXRDS():
# if we got the Yadis content-type or followed the Yadis
# header, re-fetch the document without following the Yadis
# header, with no Accept header.
return discoverNoYadis(uri)
else:
body = response.response_text
# Try to parse the response as HTML to get OpenID 1.0/1.1
# <link rel="...">
openid_services = OpenIDServiceEndpoint.fromHTML(yadis_url, body)
return (yadis_url, getOPOrUserServices(openid_services))
