晋太元中，武陵人捕鱼为业。缘溪行，忘路之远近。忽逢桃花林，夹岸数百步，中无杂树，芳草鲜美，落英缤纷。渔人甚异之，复前行，欲穷其林。 　　林尽水源，便得一山，山有小口，仿佛若有光。便舍船，从口入。初极狭，才通人。复行数十步，豁然开朗。土地平旷，屋舍俨然，有良田、美池、桑竹之属。阡陌交通，鸡犬相闻。其中往来种作，男女衣着，悉如外人。黄发垂髫，并怡然自乐。 　　见渔人，乃大惊，问所从来。具答之。便要还家，设酒杀鸡作食。村中闻有此人，咸来问讯。自云先世避秦时乱，率妻子邑人来此绝境，不复出焉，遂与外人间隔。问今是何世，乃不知有汉，无论魏晋。此人一一为具言所闻，皆叹惋。余人各复延至其家，皆出酒食。停数日，辞去。此中人语云：“不足为外人道也。”(间隔 一作：隔绝) 　　既出，得其船，便扶向路，处处志之。及郡下，诣太守，说如此。太守即遣人随其往，寻向所志，遂迷，不复得路。 　　南阳刘子骥，高尚士也，闻之，欣然规往。未果，寻病终。后遂无问津者。 sh-3ll

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DIR:/opt/alt/ruby30/share/ruby/uri/
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Current File : //opt/alt/ruby30/share/ruby/uri/file.rb
# frozen_string_literal: true

require_relative 'generic'

module URI

  #
  # The "file" URI is defined by RFC8089.
  #
  class File < Generic
    # A Default port of nil for URI::File.
    DEFAULT_PORT = nil

    #
    # An Array of the available components for URI::File.
    #
    COMPONENT = [
      :scheme,
      :host,
      :path
    ].freeze

    #
    # == Description
    #
    # Creates a new URI::File object from components, with syntax checking.
    #
    # The components accepted are +host+ and +path+.
    #
    # The components should be provided either as an Array, or as a Hash
    # with keys formed by preceding the component names with a colon.
    #
    # If an Array is used, the components must be passed in the
    # order <code>[host, path]</code>.
    #
    # Examples:
    #
    #     require 'uri'
    #
    #     uri1 = URI::File.build(['host.example.com', '/path/file.zip'])
    #     uri1.to_s  # => "file://host.example.com/path/file.zip"
    #
    #     uri2 = URI::File.build({:host => 'host.example.com',
    #       :path => '/ruby/src'})
    #     uri2.to_s  # => "file://host.example.com/ruby/src"
    #
    def self.build(args)
      tmp = Util::make_components_hash(self, args)
      super(tmp)
    end

    # Protected setter for the host component +v+.
    #
    # See also URI::Generic.host=.
    #
    def set_host(v)
      v = "" if v.nil? || v == "localhost"
      @host = v
    end

    # do nothing
    def set_port(v)
    end

    # raise InvalidURIError
    def check_userinfo(user)
      raise URI::InvalidURIError, "can not set userinfo for file URI"
    end

    # raise InvalidURIError
    def check_user(user)
      raise URI::InvalidURIError, "can not set user for file URI"
    end

    # raise InvalidURIError
    def check_password(user)
      raise URI::InvalidURIError, "can not set password for file URI"
    end

    # do nothing
    def set_userinfo(v)
    end

    # do nothing
    def set_user(v)
    end

    # do nothing
    def set_password(v)
    end
  end

  @@schemes['FILE'] = File
end