Class: KDL::Types::IRLReference::Parser

Inherits:
Object
  • Object
show all
Defined in:
lib/kdl/types/irl/parser.rb

Direct Known Subclasses

KDL::Types::IRL::Parser

Constant Summary collapse

RGX = 
/^(?:(?:([a-z][a-z0-9+.\-]+)):\/\/([^@]+@)?([^\/?#]+)?)?(\/?[^?#]*)?(?:\?([^#]*))?(?:#(.*))?$/i.freeze
PERCENT_RGX = 
/%[a-f0-9]{2}/i.freeze
RESERVED_URL_CHARS = 
%w[! # $ & ' ( ) * + , / : ; = ? @ \[ \] %]
UNRESERVED_URL_CHARS = 
%w[A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
a b c d e f g h i j k l m n o p q r s t u v w x y z
0 1 2 3 4 5 6 7 8 9 - _ . ~].freeze
URL_CHARS = 
RESERVED_URL_CHARS + UNRESERVED_URL_CHARS

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(string) ⇒ Parser

Returns a new instance of Parser.



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# File 'lib/kdl/types/irl/parser.rb', line 14

def initialize(string)
  @string = string
end

Class Method Details

.build_uri_string(scheme, auth, domain, path, search, hash) ⇒ Object 



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# File 'lib/kdl/types/irl/parser.rb', line 98

def self.build_uri_string(scheme, auth, domain, path, search, hash)
  string = ''
  string += "#{scheme}://" if scheme
  string += auth if auth
  string += domain if domain
  string += path if path
  string += "?#{search}" if search
  string += "##{hash}" if hash
  string
end

.decode(string) ⇒ Object 



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# File 'lib/kdl/types/irl/parser.rb', line 81

def self.decode(string)
  return string unless string

  string.gsub(PERCENT_RGX) do |match|
    char = match[1, 2].to_i(16).chr
    if RESERVED_URL_CHARS.include?(char)
      match
    else
      char
    end
  end.force_encoding('utf-8')
end

.encode(string) ⇒ Object 



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# File 'lib/kdl/types/irl/parser.rb', line 72

def self.encode(string)
  return string unless string

  string.chars
        .map { |c| c.ascii_only? ? c : percent_encode(c) }
        .join
        .force_encoding('utf-8')
end

.percent_encode(c) ⇒ Object 



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# File 'lib/kdl/types/irl/parser.rb', line 94

def self.percent_encode(c)
  c.bytes.map { |b| "%#{b.to_s(16)}" }.join.upcase
end

.valid_url_part?(string) ⇒ Boolean

Returns:



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# File 'lib/kdl/types/irl/parser.rb', line 64

def self.valid_url_part?(string)
  return true unless string

  string.chars.all? do |char|
    !char.ascii_only? || URL_CHARS.include?(char)
  end
end

Instance Method Details

#parse ⇒ Object 



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# File 'lib/kdl/types/irl/parser.rb', line 18

def parse
  scheme, auth, domain, path, search, hash = *parse_url

  if @string.ascii_only?
    unicode_path = Parser.decode(path)
    unicode_search = Parser.decode(search)
    unicode_hash = Parser.decode(hash)
  else
    unicode_path = path
    path = Parser.encode(unicode_path)
    unicode_search = search
    search_params = unicode_search ? unicode_search.split('&').map { |x| x.split('=') } : nil
    search = search_params ? search_params.map { |k, v| "#{Parser.encode(k)}=#{Parser.encode(v)}" }.join('&') : nil
    unicode_hash = hash
    hash = Parser.encode(hash)
  end

  if domain
    validator = IDNHostname::Validator.new(domain)
    domain = validator.ascii
    unicode_domain = validator.unicode
  else
    unicode_domain = domain
  end

  unicode_value = Parser.build_uri_string(scheme, auth, unicode_domain, unicode_path, unicode_search, unicode_hash)
  ascii_value = Parser.build_uri_string(scheme, auth, domain, path, search, hash)

  [ascii_value,
   { unicode_value: unicode_value,
     unicode_domain: unicode_domain,
     unicode_path: unicode_path,
     unicode_search: unicode_search,
     unicode_hash: unicode_hash }]
end

#parse_url ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/kdl/types/irl/parser.rb', line 54

def parse_url
  match = RGX.match(@string)
  raise ArgumentError, "invalid IRL `#{@string}'" if match.nil?

  _, *parts = *match
  raise ArgumentError, "invalid IRL `#{@string}'" unless parts.all? { |part| Parser.valid_url_part?(part) }

  parts
end