Module: OpenID::URINorm

Defined in:
lib/openid/urinorm.rb

Constant Summary collapse

VALID_URI_SCHEMES = 
%w[http https].freeze
RESERVED_RE = 
/[A-Za-z0-9._~-]/
PERCENT_ESCAPE_RE = 
/%[0-9a-zA-Z]{2}/

Class Method Summary collapse

Class Method Details

.remove_dot_segments(path) ⇒ Object 



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# File 'lib/openid/urinorm.rb', line 39

def self.remove_dot_segments(path)
  result_segments = []

  while path.length > 0
    if path.start_with?("../")
      path = path[3..-1]
    elsif path.start_with?("./")
      path = path[2..-1]
    elsif path.start_with?("/./")
      path = path[2..-1]
    elsif path == "/."
      path = "/"
    elsif path.start_with?("/../")
      path = path[3..-1]
      result_segments.pop if result_segments.length > 0
    elsif path == "/.."
      path = "/"
      result_segments.pop if result_segments.length > 0
    elsif ["..", "."].include?(path)
      path = ""
    else
      i = 0
      i = 1 if path[0].chr == "/"
      i = path.index("/", i)
      i = path.length if i.nil?
      result_segments << path[0...i]
      path = path[i..-1]
    end
  end

  result_segments.join("")
end

.reserved(chr) ⇒ Object 



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# File 'lib/openid/urinorm.rb', line 35

def self.reserved(chr)
  !(RESERVED_RE =~ chr)
end

.urinorm(uri) ⇒ Object

Raises:

  • (URI::InvalidURIError) 


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# File 'lib/openid/urinorm.rb', line 8

def self.urinorm(uri)
  uri = URI.parse(uri)

  raise URI::InvalidURIError.new("no scheme") unless uri.scheme

  uri.scheme = uri.scheme.downcase
  raise URI::InvalidURIError.new("Not an HTTP or HTTPS URI") unless VALID_URI_SCHEMES.member?(uri.scheme)

  raise URI::InvalidURIError.new("no host") if uri.host.nil? # For Ruby 2.7

  raise URI::InvalidURIError.new("no host") if uri.host.empty? # For Ruby 3+

  uri.host = uri.host.downcase

  uri.path = remove_dot_segments(uri.path)
  uri.path = "/" if uri.path.empty?

  uri = uri.normalize.to_s
  uri.gsub(PERCENT_ESCAPE_RE) do
    sub = ::Regexp.last_match(0)[1..2].to_i(16).chr
    reserved(sub) ? ::Regexp.last_match(0).upcase : sub
  end
end