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require 'openid/yadis/xrds'
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require 'openid/fetchers'
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module OpenID
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module Yadis
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module XRI
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# The '(' is for cross-reference authorities, and hopefully has a
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# matching ')' somewhere.
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XRI_AUTHORITIES = ["!", "=", "@", "+", "$", "("]
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def self.identifier_scheme(identifier)
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if (!identifier.nil? and
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identifier.length > 0 and
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(identifier.match('^xri://') or
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XRI_AUTHORITIES.member?(identifier[0].chr)))
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return :xri
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else
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return :uri
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end
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end
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# Transform an XRI reference to an IRI reference. Note this is
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# not not idempotent, so do not apply this to an identifier more
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# than once. XRI Syntax section 2.3.1
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def self.to_iri_normal(xri)
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iri = xri.dup
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iri.insert(0, 'xri://') if not iri.match('^xri://')
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return escape_for_iri(iri)
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end
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# Note this is not not idempotent, so do not apply this more than
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# once. XRI Syntax section 2.3.2
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def self.escape_for_iri(xri)
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esc = xri.dup
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# encode all %
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esc.gsub!(/%/, '%25')
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esc.gsub!(/\((.*?)\)/) { |xref_match|
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xref_match.gsub(/[\/\?\#]/) { |char_match|
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CGI::escape(char_match)
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}
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}
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return esc
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end
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# Transform an XRI reference to a URI reference. Note this is not
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# not idempotent, so do not apply this to an identifier more than
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# once. XRI Syntax section 2.3.1
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def self.to_uri_normal(xri)
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return iri_to_uri(to_iri_normal(xri))
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end
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# RFC 3987 section 3.1
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def self.iri_to_uri(iri)
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uri = iri.dup
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# for char in ucschar or iprivate
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# convert each char to %HH%HH%HH (as many %HH as octets)
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return uri
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end
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def self.provider_is_authoritative(provider_id, canonical_id)
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lastbang = canonical_id.rindex('!')
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return false unless lastbang
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parent = canonical_id[0...lastbang]
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return parent == provider_id
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end
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def self.root_authority(xri)
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xri = xri[6..-1] if xri.index('xri://') == 0
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authority = xri.split('/', 2)[0]
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if authority[0].chr == '('
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root = authority[0...authority.index(')')+1]
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elsif XRI_AUTHORITIES.member?(authority[0].chr)
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root = authority[0].chr
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else
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root = authority.split(/[!*]/)[0]
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end
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self.make_xri(root)
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end
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def self.make_xri(xri)
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if xri.index('xri://') != 0
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xri = 'xri://' + xri
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end
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return xri
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end
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end
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end
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end
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