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diff --git a/jni/ruby/lib/uri/common.rb b/jni/ruby/lib/uri/common.rb
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+#--
+# = uri/common.rb
+#
+# Author:: Akira Yamada <akira@ruby-lang.org>
+# Revision:: $Id: common.rb 47299 2014-08-27 12:21:41Z hsbt $
+# License::
+#   You can redistribute it and/or modify it under the same term as Ruby.
+#
+# See URI for general documentation
+#
+
+require "uri/rfc2396_parser"
+require "uri/rfc3986_parser"
+
+module URI
+  REGEXP = RFC2396_REGEXP
+  Parser = RFC2396_Parser
+  RFC3986_PARSER = RFC3986_Parser.new
+
+  # URI::Parser.new
+  DEFAULT_PARSER = Parser.new
+  DEFAULT_PARSER.pattern.each_pair do |sym, str|
+    unless REGEXP::PATTERN.const_defined?(sym)
+      REGEXP::PATTERN.const_set(sym, str)
+    end
+  end
+  DEFAULT_PARSER.regexp.each_pair do |sym, str|
+    const_set(sym, str)
+  end
+
+  module Util # :nodoc:
+    def make_components_hash(klass, array_hash)
+      tmp = {}
+      if array_hash.kind_of?(Array) &&
+          array_hash.size == klass.component.size - 1
+        klass.component[1..-1].each_index do |i|
+          begin
+            tmp[klass.component[i + 1]] = array_hash[i].clone
+          rescue TypeError
+            tmp[klass.component[i + 1]] = array_hash[i]
+          end
+        end
+
+      elsif array_hash.kind_of?(Hash)
+        array_hash.each do |key, value|
+          begin
+            tmp[key] = value.clone
+          rescue TypeError
+            tmp[key] = value
+          end
+        end
+      else
+        raise ArgumentError,
+          "expected Array of or Hash of components of #{klass} (#{klass.component[1..-1].join(', ')})"
+      end
+      tmp[:scheme] = klass.to_s.sub(/\A.*::/, '').downcase
+
+      return tmp
+    end
+    module_function :make_components_hash
+  end
+
+  # module for escaping unsafe characters with codes.
+  module Escape
+    #
+    # == Synopsis
+    #
+    #   URI.escape(str [, unsafe])
+    #
+    # == Args
+    #
+    # +str+::
+    #   String to replaces in.
+    # +unsafe+::
+    #   Regexp that matches all symbols that must be replaced with codes.
+    #   By default uses <tt>REGEXP::UNSAFE</tt>.
+    #   When this argument is a String, it represents a character set.
+    #
+    # == Description
+    #
+    # Escapes the string, replacing all unsafe characters with codes.
+    #
+    # == Usage
+    #
+    #   require 'uri'
+    #
+    #   enc_uri = URI.escape("http://example.com/?a=\11\15")
+    #   p enc_uri
+    #   # => "http://example.com/?a=%09%0D"
+    #
+    #   p URI.unescape(enc_uri)
+    #   # => "http://example.com/?a=\t\r"
+    #
+    #   p URI.escape("@?@!", "!?")
+    #   # => "@%3F@%21"
+    #
+    def escape(*arg)
+      warn "#{caller(1)[0]}: warning: URI.escape is obsolete" if $VERBOSE
+      DEFAULT_PARSER.escape(*arg)
+    end
+    alias encode escape
+    #
+    # == Synopsis
+    #
+    #   URI.unescape(str)
+    #
+    # == Args
+    #
+    # +str+::
+    #   Unescapes the string.
+    #
+    # == Usage
+    #
+    #   require 'uri'
+    #
+    #   enc_uri = URI.escape("http://example.com/?a=\11\15")
+    #   p enc_uri
+    #   # => "http://example.com/?a=%09%0D"
+    #
+    #   p URI.unescape(enc_uri)
+    #   # => "http://example.com/?a=\t\r"
+    #
+    def unescape(*arg)
+      warn "#{caller(1)[0]}: warning: URI.unescape is obsolete" if $VERBOSE
+      DEFAULT_PARSER.unescape(*arg)
+    end
+    alias decode unescape
+  end # module Escape
+
+  extend Escape
+  include REGEXP
+
+  @@schemes = {}
+  # Returns a Hash of the defined schemes
+  def self.scheme_list
+    @@schemes
+  end
+
+  #
+  # Base class for all URI exceptions.
+  #
+  class Error < StandardError; end
+  #
+  # Not a URI.
+  #
+  class InvalidURIError < Error; end
+  #
+  # Not a URI component.
+  #
+  class InvalidComponentError < Error; end
+  #
+  # URI is valid, bad usage is not.
+  #
+  class BadURIError < Error; end
+
+  #
+  # == Synopsis
+  #
+  #   URI::split(uri)
+  #
+  # == Args
+  #
+  # +uri+::
+  #   String with URI.
+  #
+  # == Description
+  #
+  # Splits the string on following parts and returns array with result:
+  #
+  #   * Scheme
+  #   * Userinfo
+  #   * Host
+  #   * Port
+  #   * Registry
+  #   * Path
+  #   * Opaque
+  #   * Query
+  #   * Fragment
+  #
+  # == Usage
+  #
+  #   require 'uri'
+  #
+  #   p URI.split("http://www.ruby-lang.org/")
+  #   # => ["http", nil, "www.ruby-lang.org", nil, nil, "/", nil, nil, nil]
+  #
+  def self.split(uri)
+    RFC3986_PARSER.split(uri)
+  end
+
+  #
+  # == Synopsis
+  #
+  #   URI::parse(uri_str)
+  #
+  # == Args
+  #
+  # +uri_str+::
+  #   String with URI.
+  #
+  # == Description
+  #
+  # Creates one of the URI's subclasses instance from the string.
+  #
+  # == Raises
+  #
+  # URI::InvalidURIError
+  #   Raised if URI given is not a correct one.
+  #
+  # == Usage
+  #
+  #   require 'uri'
+  #
+  #   uri = URI.parse("http://www.ruby-lang.org/")
+  #   p uri
+  #   # => #<URI::HTTP:0x202281be URL:http://www.ruby-lang.org/>
+  #   p uri.scheme
+  #   # => "http"
+  #   p uri.host
+  #   # => "www.ruby-lang.org"
+  #
+  # It's recommended to first ::escape the provided +uri_str+ if there are any
+  # invalid URI characters.
+  #
+  def self.parse(uri)
+    RFC3986_PARSER.parse(uri)
+  end
+
+  #
+  # == Synopsis
+  #
+  #   URI::join(str[, str, ...])
+  #
+  # == Args
+  #
+  # +str+::
+  #   String(s) to work with, will be converted to RFC3986 URIs before merging.
+  #
+  # == Description
+  #
+  # Joins URIs.
+  #
+  # == Usage
+  #
+  #   require 'uri'
+  #
+  #   p URI.join("http://example.com/","main.rbx")
+  #   # => #<URI::HTTP:0x2022ac02 URL:http://localhost/main.rbx>
+  #
+  #   p URI.join('http://example.com', 'foo')
+  #   # => #<URI::HTTP:0x01ab80a0 URL:http://example.com/foo>
+  #
+  #   p URI.join('http://example.com', '/foo', '/bar')
+  #   # => #<URI::HTTP:0x01aaf0b0 URL:http://example.com/bar>
+  #
+  #   p URI.join('http://example.com', '/foo', 'bar')
+  #   # => #<URI::HTTP:0x801a92af0 URL:http://example.com/bar>
+  #
+  #   p URI.join('http://example.com', '/foo/', 'bar')
+  #   # => #<URI::HTTP:0x80135a3a0 URL:http://example.com/foo/bar>
+  #
+  #
+  def self.join(*str)
+    RFC3986_PARSER.join(*str)
+  end
+
+  #
+  # == Synopsis
+  #
+  #   URI::extract(str[, schemes][,&blk])
+  #
+  # == Args
+  #
+  # +str+::
+  #   String to extract URIs from.
+  # +schemes+::
+  #   Limit URI matching to a specific schemes.
+  #
+  # == Description
+  #
+  # Extracts URIs from a string. If block given, iterates through all matched URIs.
+  # Returns nil if block given or array with matches.
+  #
+  # == Usage
+  #
+  #   require "uri"
+  #
+  #   URI.extract("text here http://foo.example.org/bla and here mailto:test@example.com and here also.")
+  #   # => ["http://foo.example.com/bla", "mailto:test@example.com"]
+  #
+  def self.extract(str, schemes = nil, &block)
+    warn "#{caller(1)[0]}: warning: URI.extract is obsolete" if $VERBOSE
+    DEFAULT_PARSER.extract(str, schemes, &block)
+  end
+
+  #
+  # == Synopsis
+  #
+  #   URI::regexp([match_schemes])
+  #
+  # == Args
+  #
+  # +match_schemes+::
+  #   Array of schemes. If given, resulting regexp matches to URIs
+  #   whose scheme is one of the match_schemes.
+  #
+  # == Description
+  # Returns a Regexp object which matches to URI-like strings.
+  # The Regexp object returned by this method includes arbitrary
+  # number of capture group (parentheses).  Never rely on it's number.
+  #
+  # == Usage
+  #
+  #   require 'uri'
+  #
+  #   # extract first URI from html_string
+  #   html_string.slice(URI.regexp)
+  #
+  #   # remove ftp URIs
+  #   html_string.sub(URI.regexp(['ftp'])
+  #
+  #   # You should not rely on the number of parentheses
+  #   html_string.scan(URI.regexp) do |*matches|
+  #     p $&
+  #   end
+  #
+  def self.regexp(schemes = nil)
+    warn "#{caller(1)[0]}: warning: URI.regexp is obsolete" if $VERBOSE
+    DEFAULT_PARSER.make_regexp(schemes)
+  end
+
+  TBLENCWWWCOMP_ = {} # :nodoc:
+  256.times do |i|
+    TBLENCWWWCOMP_[i.chr] = '%%%02X' % i
+  end
+  TBLENCWWWCOMP_[' '] = '+'
+  TBLENCWWWCOMP_.freeze
+  TBLDECWWWCOMP_ = {} # :nodoc:
+  256.times do |i|
+    h, l = i>>4, i&15
+    TBLDECWWWCOMP_['%%%X%X' % [h, l]] = i.chr
+    TBLDECWWWCOMP_['%%%x%X' % [h, l]] = i.chr
+    TBLDECWWWCOMP_['%%%X%x' % [h, l]] = i.chr
+    TBLDECWWWCOMP_['%%%x%x' % [h, l]] = i.chr
+  end
+  TBLDECWWWCOMP_['+'] = ' '
+  TBLDECWWWCOMP_.freeze
+
+  HTML5ASCIIINCOMPAT = [Encoding::UTF_7, Encoding::UTF_16BE, Encoding::UTF_16LE,
+    Encoding::UTF_32BE, Encoding::UTF_32LE] # :nodoc:
+
+  # Encode given +str+ to URL-encoded form data.
+  #
+  # This method doesn't convert *, -, ., 0-9, A-Z, _, a-z, but does convert SP
+  # (ASCII space) to + and converts others to %XX.
+  #
+  # If +enc+ is given, convert +str+ to the encoding before percent encoding.
+  #
+  # This is an implementation of
+  # http://www.w3.org/TR/2013/CR-html5-20130806/forms.html#url-encoded-form-data
+  #
+  # See URI.decode_www_form_component, URI.encode_www_form
+  def self.encode_www_form_component(str, enc=nil)
+    str = str.to_s.dup
+    if str.encoding != Encoding::ASCII_8BIT
+      if enc && enc != Encoding::ASCII_8BIT
+        str.encode!(Encoding::UTF_8, invalid: :replace, undef: :replace)
+        str.encode!(enc, fallback: ->(x){"&#{x.ord};"})
+      end
+      str.force_encoding(Encoding::ASCII_8BIT)
+    end
+    str.gsub!(/[^*\-.0-9A-Z_a-z]/, TBLENCWWWCOMP_)
+    str.force_encoding(Encoding::US_ASCII)
+  end
+
+  # Decode given +str+ of URL-encoded form data.
+  #
+  # This decodes + to SP.
+  #
+  # See URI.encode_www_form_component, URI.decode_www_form
+  def self.decode_www_form_component(str, enc=Encoding::UTF_8)
+    raise ArgumentError, "invalid %-encoding (#{str})" if /%(?!\h\h)/ =~ str
+    str.b.gsub(/\+|%\h\h/, TBLDECWWWCOMP_).force_encoding(enc)
+  end
+
+  # Generate URL-encoded form data from given +enum+.
+  #
+  # This generates application/x-www-form-urlencoded data defined in HTML5
+  # from given an Enumerable object.
+  #
+  # This internally uses URI.encode_www_form_component(str).
+  #
+  # This method doesn't convert the encoding of given items, so convert them
+  # before call this method if you want to send data as other than original
+  # encoding or mixed encoding data. (Strings which are encoded in an HTML5
+  # ASCII incompatible encoding are converted to UTF-8.)
+  #
+  # This method doesn't handle files.  When you send a file, use
+  # multipart/form-data.
+  #
+  # This refers http://url.spec.whatwg.org/#concept-urlencoded-serializer
+  #
+  #    URI.encode_www_form([["q", "ruby"], ["lang", "en"]])
+  #    #=> "q=ruby&lang=en"
+  #    URI.encode_www_form("q" => "ruby", "lang" => "en")
+  #    #=> "q=ruby&lang=en"
+  #    URI.encode_www_form("q" => ["ruby", "perl"], "lang" => "en")
+  #    #=> "q=ruby&q=perl&lang=en"
+  #    URI.encode_www_form([["q", "ruby"], ["q", "perl"], ["lang", "en"]])
+  #    #=> "q=ruby&q=perl&lang=en"
+  #
+  # See URI.encode_www_form_component, URI.decode_www_form
+  def self.encode_www_form(enum, enc=nil)
+    enum.map do |k,v|
+      if v.nil?
+        encode_www_form_component(k, enc)
+      elsif v.respond_to?(:to_ary)
+        v.to_ary.map do |w|
+          str = encode_www_form_component(k, enc)
+          unless w.nil?
+            str << '='
+            str << encode_www_form_component(w, enc)
+          end
+        end.join('&')
+      else
+        str = encode_www_form_component(k, enc)
+        str << '='
+        str << encode_www_form_component(v, enc)
+      end
+    end.join('&')
+  end
+
+  # Decode URL-encoded form data from given +str+.
+  #
+  # This decodes application/x-www-form-urlencoded data
+  # and returns array of key-value array.
+  #
+  # This refers http://url.spec.whatwg.org/#concept-urlencoded-parser ,
+  # so this supports only &-separator, don't support ;-separator.
+  #
+  # ary = URI.decode_www_form("a=1&a=2&b=3")
+  # p ary                  #=> [['a', '1'], ['a', '2'], ['b', '3']]
+  # p ary.assoc('a').last  #=> '1'
+  # p ary.assoc('b').last  #=> '3'
+  # p ary.rassoc('a').last #=> '2'
+  # p Hash[ary]            # => {"a"=>"2", "b"=>"3"}
+  #
+  # See URI.decode_www_form_component, URI.encode_www_form
+  def self.decode_www_form(str, enc=Encoding::UTF_8, separator: '&', use__charset_: false, isindex: false)
+    raise ArgumentError, "the input of #{self.name}.#{__method__} must be ASCII only string" unless str.ascii_only?
+    ary = []
+    return ary if str.empty?
+    enc = Encoding.find(enc)
+    str.b.each_line(separator) do |string|
+      string.chomp!(separator)
+      key, sep, val = string.partition('=')
+      if isindex
+        if sep.empty?
+          val = key
+          key = ''
+        end
+        isindex = false
+      end
+
+      if use__charset_ and key == '_charset_' and e = get_encoding(val)
+        enc = e
+        use__charset_ = false
+      end
+
+      key.gsub!(/\+|%\h\h/, TBLDECWWWCOMP_)
+      if val
+        val.gsub!(/\+|%\h\h/, TBLDECWWWCOMP_)
+      else
+        val = ''
+      end
+
+      ary << [key, val]
+    end
+    ary.each do |k, v|
+      k.force_encoding(enc)
+      k.scrub!
+      v.force_encoding(enc)
+      v.scrub!
+    end
+    ary
+  end
+
+  private
+  # curl http://encoding.spec.whatwg.org/encodings.json|rb -rpp -rjson -e'H={};h={"shift_jis"=>"Windows-31J","euc-jp"=>"cp51932","iso-2022-jp"=>"cp50221","x-mac-cyrillic"=>"macCyrillic"};JSON($<.read).map{|x|x["encodings"]}.flatten.each{|x|Encoding.find(n=h.fetch(n=x["name"],n))rescue next;x["labels"].each{|y|H[y]=n}};pp H'
+  WEB_ENCODINGS_ = {
+    "unicode-1-1-utf-8"=>"utf-8",
+    "utf-8"=>"utf-8",
+    "utf8"=>"utf-8",
+    "866"=>"ibm866",
+    "cp866"=>"ibm866",
+    "csibm866"=>"ibm866",
+    "ibm866"=>"ibm866",
+    "csisolatin2"=>"iso-8859-2",
+    "iso-8859-2"=>"iso-8859-2",
+    "iso-ir-101"=>"iso-8859-2",
+    "iso8859-2"=>"iso-8859-2",
+    "iso88592"=>"iso-8859-2",
+    "iso_8859-2"=>"iso-8859-2",
+    "iso_8859-2:1987"=>"iso-8859-2",
+    "l2"=>"iso-8859-2",
+    "latin2"=>"iso-8859-2",
+    "csisolatin3"=>"iso-8859-3",
+    "iso-8859-3"=>"iso-8859-3",
+    "iso-ir-109"=>"iso-8859-3",
+    "iso8859-3"=>"iso-8859-3",
+    "iso88593"=>"iso-8859-3",
+    "iso_8859-3"=>"iso-8859-3",
+    "iso_8859-3:1988"=>"iso-8859-3",
+    "l3"=>"iso-8859-3",
+    "latin3"=>"iso-8859-3",
+    "csisolatin4"=>"iso-8859-4",
+    "iso-8859-4"=>"iso-8859-4",
+    "iso-ir-110"=>"iso-8859-4",
+    "iso8859-4"=>"iso-8859-4",
+    "iso88594"=>"iso-8859-4",
+    "iso_8859-4"=>"iso-8859-4",
+    "iso_8859-4:1988"=>"iso-8859-4",
+    "l4"=>"iso-8859-4",
+    "latin4"=>"iso-8859-4",
+    "csisolatincyrillic"=>"iso-8859-5",
+    "cyrillic"=>"iso-8859-5",
+    "iso-8859-5"=>"iso-8859-5",
+    "iso-ir-144"=>"iso-8859-5",
+    "iso8859-5"=>"iso-8859-5",
+    "iso88595"=>"iso-8859-5",
+    "iso_8859-5"=>"iso-8859-5",
+    "iso_8859-5:1988"=>"iso-8859-5",
+    "arabic"=>"iso-8859-6",
+    "asmo-708"=>"iso-8859-6",
+    "csiso88596e"=>"iso-8859-6",
+    "csiso88596i"=>"iso-8859-6",
+    "csisolatinarabic"=>"iso-8859-6",
+    "ecma-114"=>"iso-8859-6",
+    "iso-8859-6"=>"iso-8859-6",
+    "iso-8859-6-e"=>"iso-8859-6",
+    "iso-8859-6-i"=>"iso-8859-6",
+    "iso-ir-127"=>"iso-8859-6",
+    "iso8859-6"=>"iso-8859-6",
+    "iso88596"=>"iso-8859-6",
+    "iso_8859-6"=>"iso-8859-6",
+    "iso_8859-6:1987"=>"iso-8859-6",
+    "csisolatingreek"=>"iso-8859-7",
+    "ecma-118"=>"iso-8859-7",
+    "elot_928"=>"iso-8859-7",
+    "greek"=>"iso-8859-7",
+    "greek8"=>"iso-8859-7",
+    "iso-8859-7"=>"iso-8859-7",
+    "iso-ir-126"=>"iso-8859-7",
+    "iso8859-7"=>"iso-8859-7",
+    "iso88597"=>"iso-8859-7",
+    "iso_8859-7"=>"iso-8859-7",
+    "iso_8859-7:1987"=>"iso-8859-7",
+    "sun_eu_greek"=>"iso-8859-7",
+    "csiso88598e"=>"iso-8859-8",
+    "csisolatinhebrew"=>"iso-8859-8",
+    "hebrew"=>"iso-8859-8",
+    "iso-8859-8"=>"iso-8859-8",
+    "iso-8859-8-e"=>"iso-8859-8",
+    "iso-ir-138"=>"iso-8859-8",
+    "iso8859-8"=>"iso-8859-8",
+    "iso88598"=>"iso-8859-8",
+    "iso_8859-8"=>"iso-8859-8",
+    "iso_8859-8:1988"=>"iso-8859-8",
+    "visual"=>"iso-8859-8",
+    "csisolatin6"=>"iso-8859-10",
+    "iso-8859-10"=>"iso-8859-10",
+    "iso-ir-157"=>"iso-8859-10",
+    "iso8859-10"=>"iso-8859-10",
+    "iso885910"=>"iso-8859-10",
+    "l6"=>"iso-8859-10",
+    "latin6"=>"iso-8859-10",
+    "iso-8859-13"=>"iso-8859-13",
+    "iso8859-13"=>"iso-8859-13",
+    "iso885913"=>"iso-8859-13",
+    "iso-8859-14"=>"iso-8859-14",
+    "iso8859-14"=>"iso-8859-14",
+    "iso885914"=>"iso-8859-14",
+    "csisolatin9"=>"iso-8859-15",
+    "iso-8859-15"=>"iso-8859-15",
+    "iso8859-15"=>"iso-8859-15",
+    "iso885915"=>"iso-8859-15",
+    "iso_8859-15"=>"iso-8859-15",
+    "l9"=>"iso-8859-15",
+    "iso-8859-16"=>"iso-8859-16",
+    "cskoi8r"=>"koi8-r",
+    "koi"=>"koi8-r",
+    "koi8"=>"koi8-r",
+    "koi8-r"=>"koi8-r",
+    "koi8_r"=>"koi8-r",
+    "koi8-u"=>"koi8-u",
+    "dos-874"=>"windows-874",
+    "iso-8859-11"=>"windows-874",
+    "iso8859-11"=>"windows-874",
+    "iso885911"=>"windows-874",
+    "tis-620"=>"windows-874",
+    "windows-874"=>"windows-874",
+    "cp1250"=>"windows-1250",
+    "windows-1250"=>"windows-1250",
+    "x-cp1250"=>"windows-1250",
+    "cp1251"=>"windows-1251",
+    "windows-1251"=>"windows-1251",
+    "x-cp1251"=>"windows-1251",
+    "ansi_x3.4-1968"=>"windows-1252",
+    "ascii"=>"windows-1252",
+    "cp1252"=>"windows-1252",
+    "cp819"=>"windows-1252",
+    "csisolatin1"=>"windows-1252",
+    "ibm819"=>"windows-1252",
+    "iso-8859-1"=>"windows-1252",
+    "iso-ir-100"=>"windows-1252",
+    "iso8859-1"=>"windows-1252",
+    "iso88591"=>"windows-1252",
+    "iso_8859-1"=>"windows-1252",
+    "iso_8859-1:1987"=>"windows-1252",
+    "l1"=>"windows-1252",
+    "latin1"=>"windows-1252",
+    "us-ascii"=>"windows-1252",
+    "windows-1252"=>"windows-1252",
+    "x-cp1252"=>"windows-1252",
+    "cp1253"=>"windows-1253",
+    "windows-1253"=>"windows-1253",
+    "x-cp1253"=>"windows-1253",
+    "cp1254"=>"windows-1254",
+    "csisolatin5"=>"windows-1254",
+    "iso-8859-9"=>"windows-1254",
+    "iso-ir-148"=>"windows-1254",
+    "iso8859-9"=>"windows-1254",
+    "iso88599"=>"windows-1254",
+    "iso_8859-9"=>"windows-1254",
+    "iso_8859-9:1989"=>"windows-1254",
+    "l5"=>"windows-1254",
+    "latin5"=>"windows-1254",
+    "windows-1254"=>"windows-1254",
+    "x-cp1254"=>"windows-1254",
+    "cp1255"=>"windows-1255",
+    "windows-1255"=>"windows-1255",
+    "x-cp1255"=>"windows-1255",
+    "cp1256"=>"windows-1256",
+    "windows-1256"=>"windows-1256",
+    "x-cp1256"=>"windows-1256",
+    "cp1257"=>"windows-1257",
+    "windows-1257"=>"windows-1257",
+    "x-cp1257"=>"windows-1257",
+    "cp1258"=>"windows-1258",
+    "windows-1258"=>"windows-1258",
+    "x-cp1258"=>"windows-1258",
+    "x-mac-cyrillic"=>"macCyrillic",
+    "x-mac-ukrainian"=>"macCyrillic",
+    "chinese"=>"gbk",
+    "csgb2312"=>"gbk",
+    "csiso58gb231280"=>"gbk",
+    "gb2312"=>"gbk",
+    "gb_2312"=>"gbk",
+    "gb_2312-80"=>"gbk",
+    "gbk"=>"gbk",
+    "iso-ir-58"=>"gbk",
+    "x-gbk"=>"gbk",
+    "gb18030"=>"gb18030",
+    "big5"=>"big5",
+    "big5-hkscs"=>"big5",
+    "cn-big5"=>"big5",
+    "csbig5"=>"big5",
+    "x-x-big5"=>"big5",
+    "cseucpkdfmtjapanese"=>"cp51932",
+    "euc-jp"=>"cp51932",
+    "x-euc-jp"=>"cp51932",
+    "csiso2022jp"=>"cp50221",
+    "iso-2022-jp"=>"cp50221",
+    "csshiftjis"=>"Windows-31J",
+    "ms_kanji"=>"Windows-31J",
+    "shift-jis"=>"Windows-31J",
+    "shift_jis"=>"Windows-31J",
+    "sjis"=>"Windows-31J",
+    "windows-31j"=>"Windows-31J",
+    "x-sjis"=>"Windows-31J",
+    "cseuckr"=>"euc-kr",
+    "csksc56011987"=>"euc-kr",
+    "euc-kr"=>"euc-kr",
+    "iso-ir-149"=>"euc-kr",
+    "korean"=>"euc-kr",
+    "ks_c_5601-1987"=>"euc-kr",
+    "ks_c_5601-1989"=>"euc-kr",
+    "ksc5601"=>"euc-kr",
+    "ksc_5601"=>"euc-kr",
+    "windows-949"=>"euc-kr",
+    "utf-16be"=>"utf-16be",
+    "utf-16"=>"utf-16le",
+    "utf-16le"=>"utf-16le"
+  } # :nodoc:
+
+  # :nodoc:
+  # return encoding or nil
+  # http://encoding.spec.whatwg.org/#concept-encoding-get
+  def self.get_encoding(label)
+    Encoding.find(WEB_ENCODINGS_[label.to_str.strip.downcase]) rescue nil
+  end
+end # module URI
+
+module Kernel
+
+  #
+  # Returns +uri+ converted to a URI object.
+  #
+  def URI(uri)
+    if uri.is_a?(URI::Generic)
+      uri
+    elsif uri = String.try_convert(uri)
+      URI.parse(uri)
+    else
+      raise ArgumentError,
+        "bad argument (expected URI object or URI string)"
+    end
+  end
+  module_function :URI
+end