76 lines
1.8 KiB
Ruby
76 lines
1.8 KiB
Ruby
require 'uri'
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require "openid/extras"
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module OpenID
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module URINorm
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public
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def URINorm.urinorm(uri)
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uri = URI.parse(uri)
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raise URI::InvalidURIError.new('no scheme') unless uri.scheme
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uri.scheme = uri.scheme.downcase
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unless ['http','https'].member?(uri.scheme)
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raise URI::InvalidURIError.new('Not an HTTP or HTTPS URI')
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end
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raise URI::InvalidURIError.new('no host') unless uri.host
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uri.host = uri.host.downcase
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uri.path = remove_dot_segments(uri.path)
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uri.path = '/' if uri.path.length == 0
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uri = uri.normalize.to_s
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uri = uri.gsub(PERCENT_ESCAPE_RE) {
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sub = $&[1..2].to_i(16).chr
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reserved(sub) ? $&.upcase : sub
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}
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return uri
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end
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private
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RESERVED_RE = /[A-Za-z0-9._~-]/
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PERCENT_ESCAPE_RE = /%[0-9a-zA-Z]{2}/
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def URINorm.reserved(chr)
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not RESERVED_RE =~ chr
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end
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def URINorm.remove_dot_segments(path)
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result_segments = []
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while path.length > 0
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if path.starts_with?('../')
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path = path[3..-1]
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elsif path.starts_with?('./')
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path = path[2..-1]
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elsif path.starts_with?('/./')
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path = path[2..-1]
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elsif path == '/.'
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path = '/'
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elsif path.starts_with?('/../')
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path = path[3..-1]
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result_segments.pop if result_segments.length > 0
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elsif path == '/..'
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path = '/'
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result_segments.pop if result_segments.length > 0
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elsif path == '..' or path == '.'
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path = ''
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else
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i = 0
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i = 1 if path[0].chr == '/'
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i = path.index('/', i)
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i = path.length if i.nil?
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result_segments << path[0...i]
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path = path[i..-1]
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end
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end
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return result_segments.join('')
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end
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end
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end
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