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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sh-3ll 1.0
DIR:/opt/alt/ruby24/lib64/ruby/2.4.0/rubygems/request/
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Current File : //opt/alt/ruby24/lib64/ruby/2.4.0/rubygems/request/connection_pools.rb
# frozen_string_literal: true
require 'thread'

class Gem::Request::ConnectionPools # :nodoc:

  @client = Net::HTTP

  class << self
    attr_accessor :client
  end

  def initialize proxy_uri, cert_files
    @proxy_uri  = proxy_uri
    @cert_files = cert_files
    @pools      = {}
    @pool_mutex = Mutex.new
  end

  def pool_for uri
    http_args = net_http_args(uri, @proxy_uri)
    key       = http_args + [https?(uri)]
    @pool_mutex.synchronize do
      @pools[key] ||=
        if https? uri then
          Gem::Request::HTTPSPool.new(http_args, @cert_files, @proxy_uri)
        else
          Gem::Request::HTTPPool.new(http_args, @cert_files, @proxy_uri)
        end
    end
  end

  def close_all
    @pools.each_value {|pool| pool.close_all}
  end

  private

  ##
  # Returns list of no_proxy entries (if any) from the environment

  def get_no_proxy_from_env
    env_no_proxy = ENV['no_proxy'] || ENV['NO_PROXY']

    return [] if env_no_proxy.nil?  or env_no_proxy.empty?

    env_no_proxy.split(/\s*,\s*/)
  end

  def https? uri
    uri.scheme.downcase == 'https'
  end

  def no_proxy? host, env_no_proxy
    host = host.downcase

    env_no_proxy.any? do |pattern|
      pattern = pattern.downcase

      host[-pattern.length, pattern.length] == pattern or
        (pattern.start_with? '.' and pattern[1..-1] == host)
    end
  end

  def net_http_args uri, proxy_uri
    # URI::Generic#hostname was added in ruby 1.9.3, use it if exists, otherwise
    # don't support IPv6 literals and use host.
    hostname = uri.respond_to?(:hostname) ? uri.hostname : uri.host
    net_http_args = [hostname, uri.port]

    no_proxy = get_no_proxy_from_env

    if proxy_uri and not no_proxy?(hostname, no_proxy) then
      proxy_hostname = proxy_uri.respond_to?(:hostname) ? proxy_uri.hostname : proxy_uri.host
      net_http_args + [
        proxy_hostname,
        proxy_uri.port,
        Gem::UriFormatter.new(proxy_uri.user).unescape,
        Gem::UriFormatter.new(proxy_uri.password).unescape,
      ]
    elsif no_proxy? hostname, no_proxy then
      net_http_args + [nil, nil]
    else
      net_http_args
    end
  end

end