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yadis.pl -- Yadis discovery
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See also
- http://en.wikipedia.org/wiki/Yadis
Source xrds_dom(+Id, -XRDS_DOM) is det
True when XRDS_DOM is a parsed XML document for the given resource.
Source xid_normalize(+OpenID, -URL) is det[private]
Translate the user-specified OpenID agent into a URL. This follows appendix A.1. (Normalization), RFC3986).
To be done
- This does not implement XRI identifiers.
Source xrds_location(+Id, -XRDSLocation) is semidet
Discover the location of the XRDS document from the given Id.
Source xrds_load(+XRDSLocation, -XRDS_DOM) is det[private]
Parse the XRDS document at XRDSLocation.
Source ssl_verify(+SSL, +ProblemCert, +AllCerts, +FirstCert, +Error)
Accept all certificates.
Source html_head_dom(+Stream, -HeadDOM) is semidet[private]
Extract the HTML head content from the given stream. Does not parse the remainder of the document.
Source xrds_specified_location(+URL, -XRDSLocation) is nondet[multifile]
Hook that allows for specifying locations of XRDS documents. For example, Google does not reply to Yadis discovery messages. We can fake it does using: 
yadis:xrds_specified_location('http://google.com/',
                              'https://www.google.com/accounts/o8/id').

If this hook succeeds with XRDSLocation bound to - (minus), we assume there is no XRDS document associated to URL. This can be used to avoid retrieving misleading or broken XRDS documents.