xri.rb
90 lines
| 2.6 KiB
| text/x-ruby
|
RubyLexer
Eric Davis
|
r2376 | require 'openid/yadis/xrds' | ||
| require 'openid/fetchers' | ||||
| module OpenID | ||||
| module Yadis | ||||
| module XRI | ||||
| # The '(' is for cross-reference authorities, and hopefully has a | ||||
| # matching ')' somewhere. | ||||
| XRI_AUTHORITIES = ["!", "=", "@", "+", "$", "("] | ||||
| def self.identifier_scheme(identifier) | ||||
| if (!identifier.nil? and | ||||
| identifier.length > 0 and | ||||
| (identifier.match('^xri://') or | ||||
| XRI_AUTHORITIES.member?(identifier[0].chr))) | ||||
| return :xri | ||||
| else | ||||
| return :uri | ||||
| end | ||||
| end | ||||
| # Transform an XRI reference to an IRI reference. Note this is | ||||
| # not not idempotent, so do not apply this to an identifier more | ||||
| # than once. XRI Syntax section 2.3.1 | ||||
| def self.to_iri_normal(xri) | ||||
| iri = xri.dup | ||||
| iri.insert(0, 'xri://') if not iri.match('^xri://') | ||||
| return escape_for_iri(iri) | ||||
| end | ||||
| # Note this is not not idempotent, so do not apply this more than | ||||
| # once. XRI Syntax section 2.3.2 | ||||
| def self.escape_for_iri(xri) | ||||
| esc = xri.dup | ||||
| # encode all % | ||||
| esc.gsub!(/%/, '%25') | ||||
| esc.gsub!(/\((.*?)\)/) { |xref_match| | ||||
| xref_match.gsub(/[\/\?\#]/) { |char_match| | ||||
| CGI::escape(char_match) | ||||
| } | ||||
| } | ||||
| return esc | ||||
| end | ||||
| # Transform an XRI reference to a URI reference. Note this is not | ||||
| # not idempotent, so do not apply this to an identifier more than | ||||
| # once. XRI Syntax section 2.3.1 | ||||
| def self.to_uri_normal(xri) | ||||
| return iri_to_uri(to_iri_normal(xri)) | ||||
| end | ||||
| # RFC 3987 section 3.1 | ||||
| def self.iri_to_uri(iri) | ||||
| uri = iri.dup | ||||
| # for char in ucschar or iprivate | ||||
| # convert each char to %HH%HH%HH (as many %HH as octets) | ||||
| return uri | ||||
| end | ||||
| def self.provider_is_authoritative(provider_id, canonical_id) | ||||
| lastbang = canonical_id.rindex('!') | ||||
| return false unless lastbang | ||||
| parent = canonical_id[0...lastbang] | ||||
| return parent == provider_id | ||||
| end | ||||
| def self.root_authority(xri) | ||||
| xri = xri[6..-1] if xri.index('xri://') == 0 | ||||
| authority = xri.split('/', 2)[0] | ||||
| if authority[0].chr == '(' | ||||
| root = authority[0...authority.index(')')+1] | ||||
| elsif XRI_AUTHORITIES.member?(authority[0].chr) | ||||
| root = authority[0].chr | ||||
| else | ||||
| root = authority.split(/[!*]/)[0] | ||||
| end | ||||
| self.make_xri(root) | ||||
| end | ||||
| def self.make_xri(xri) | ||||
| if xri.index('xri://') != 0 | ||||
| xri = 'xri://' + xri | ||||
| end | ||||
| return xri | ||||
| end | ||||
| end | ||||
| end | ||||
| end | ||||