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File Name : mirror.rb

# frozen_string_literal: true

require "socket"

module Bundler
  class Settings
    # Class used to build the mirror set and then find a mirror for a given URI
    #
    # @param prober [Prober object, nil] by default a TCPSocketProbe, this object
    #   will be used to probe the mirror address to validate that the mirror replies.
    class Mirrors
      def initialize(prober = nil)
        @all = Mirror.new
        @prober = prober || TCPSocketProbe.new
        @mirrors = {}
      end

# Returns a mirror for the given uri.
      #
      # Depending on the uri having a valid mirror or not, it may be a
      #   mirror that points to the provided uri
      def for(uri)
        if @all.validate!(@prober).valid?
          @all
        else
          fetch_valid_mirror_for(Settings.normalize_uri(uri))
        end
      end

def each
        @mirrors.each do |k, v|
          yield k, v.uri.to_s
        end
      end

def parse(key, value)
        config = MirrorConfig.new(key, value)
        mirror = if config.all?
          @all
        else
          @mirrors[config.uri] ||= Mirror.new
        end
        config.update_mirror(mirror)
      end

private

def fetch_valid_mirror_for(uri)
        downcased = uri.to_s.downcase
        mirror = @mirrors[downcased] || @mirrors[Bundler::URI(downcased).host] || Mirror.new(uri)
        mirror.validate!(@prober)
        mirror = Mirror.new(uri) unless mirror.valid?
        mirror
      end
    end

# A mirror
    #
    # Contains both the uri that should be used as a mirror and the
    #   fallback timeout which will be used for probing if the mirror
    #   replies on time or not.
    class Mirror
      DEFAULT_FALLBACK_TIMEOUT = 0.1

attr_reader :uri, :fallback_timeout

def initialize(uri = nil, fallback_timeout = 0)
        self.uri = uri
        self.fallback_timeout = fallback_timeout
        @valid = nil
      end

def uri=(uri)
        @uri = if uri.nil?
          nil
        else
          Bundler::URI(uri.to_s)
        end
        @valid = nil
      end

def fallback_timeout=(timeout)
        case timeout
        when true, "true"
          @fallback_timeout = DEFAULT_FALLBACK_TIMEOUT
        when false, "false"
          @fallback_timeout = 0
        else
          @fallback_timeout = timeout.to_i
        end
        @valid = nil
      end

def ==(other)
        !other.nil? && uri == other.uri && fallback_timeout == other.fallback_timeout
      end

def valid?
        return false if @uri.nil?
        return @valid unless @valid.nil?
        false
      end

def validate!(probe = nil)
        @valid = false if uri.nil?
        if @valid.nil?
          @valid = fallback_timeout == 0 || (probe || TCPSocketProbe.new).replies?(self)
        end
        self
      end
    end

# Class used to parse one configuration line
    #
    # Gets the configuration line and the value.
    #   This object provides a `update_mirror` method
    #   used to setup the given mirror value.
    class MirrorConfig
      attr_accessor :uri, :value

def initialize(config_line, value)
        uri, fallback =
          config_line.match(%r{\Amirror\.(all|.+?)(\.fallback_timeout)?\/?\z}).captures
        @fallback = !fallback.nil?
        @all = false
        if uri == "all"
          @all = true
        else
          @uri = Bundler::URI(uri).absolute? ? Settings.normalize_uri(uri) : uri
        end
        @value = value
      end

def all?
        @all
      end

def update_mirror(mirror)
        if @fallback
          mirror.fallback_timeout = @value
        else
          mirror.uri = Settings.normalize_uri(@value)
        end
      end
    end

# Class used for probing TCP availability for a given mirror.
    class TCPSocketProbe
      def replies?(mirror)
        MirrorSockets.new(mirror).any? do |socket, address, timeout|
          socket.connect_nonblock(address)
        rescue Errno::EINPROGRESS
          wait_for_writtable_socket(socket, address, timeout)
        rescue RuntimeError # Connection failed somehow, again
          false
        end
      end

private

def wait_for_writtable_socket(socket, address, timeout)
        if IO.select(nil, [socket], nil, timeout)
          probe_writtable_socket(socket, address)
        else # TCP Handshake timed out, or there is something dropping packets
          false
        end
      end

def probe_writtable_socket(socket, address)
        socket.connect_nonblock(address)
      rescue Errno::EISCONN
        true
      rescue StandardError # Connection failed
        false
      end
    end
  end

# Class used to build the list of sockets that correspond to
  #   a given mirror.
  #
  # One mirror may correspond to many different addresses, both
  #   because of it having many dns entries or because
  #   the network interface is both ipv4 and ipv5
  class MirrorSockets
    def initialize(mirror)
      @timeout = mirror.fallback_timeout
      @addresses = Socket.getaddrinfo(mirror.uri.host, mirror.uri.port).map do |address|
        SocketAddress.new(address[0], address[3], address[1])
      end
    end

def any?
      @addresses.any? do |address|
        socket = Socket.new(Socket.const_get(address.type), Socket::SOCK_STREAM, 0)
        socket.setsockopt(Socket::IPPROTO_TCP, Socket::TCP_NODELAY, 1)
        value = yield socket, address.to_socket_address, @timeout
        socket.close unless socket.closed?
        value
      end
    end
  end

# Socket address builder.
  #
  # Given a socket type, a host and a port,
  #   provides a method to build sockaddr string
  class SocketAddress
    attr_reader :type, :host, :port

def initialize(type, host, port)
      @type = type
      @host = host
      @port = port
    end

def to_socket_address
      Socket.pack_sockaddr_in(@port, @host)
    end
  end
end

Name	Type	Size	Owner/Group	Permission	Last Modified	Actions
.	dir	-	root/linksafe	0755	2025-09-13 05:01:44
..	dir	-	root/linksafe	0755	2025-09-13 05:01:44
cli	dir	-	root/linksafe	0755	2025-09-13 05:01:44
compact_index_client	dir	-	root/linksafe	0755	2025-09-13 05:01:44
fetcher	dir	-	root/linksafe	0755	2025-09-13 05:01:44
installer	dir	-	root/linksafe	0755	2025-09-13 05:01:44
man	dir	-	root/linksafe	0755	2025-09-13 05:01:44
plugin	dir	-	root/linksafe	0755	2025-09-13 05:01:44
resolver	dir	-	root/linksafe	0755	2025-09-13 05:01:44
settings	dir	-	root/linksafe	0755	2025-09-13 05:01:44
source	dir	-	root/linksafe	0755	2025-09-13 05:01:44
templates	dir	-	root/linksafe	0755	2025-09-13 05:01:44
ui	dir	-	root/linksafe	0755	2025-09-13 05:01:44
vendor	dir	-	root/linksafe	0755	2025-08-20 02:36:17
build_metadata.rb	text/x-ruby	1.2 KB	root/linksafe	0644	2025-08-20 02:36:28
capistrano.rb	text/plain	883 B	root/linksafe	0644	2025-08-20 02:36:28
cli.rb	text/x-ruby	41 KB	root/linksafe	0644	2025-08-20 02:36:28
compact_index_client.rb	text/x-ruby	3.36 KB	root/linksafe	0644	2025-08-20 02:36:28
constants.rb	text/x-ruby	224 B	root/linksafe	0644	2025-08-20 02:36:28
current_ruby.rb	text/x-ruby	2.43 KB	root/linksafe	0644	2025-08-20 02:36:28
definition.rb	text/x-ruby	32.33 KB	root/linksafe	0644	2025-08-20 02:36:28
dependency.rb	text/x-ruby	3.11 KB	root/linksafe	0644	2025-08-20 02:36:28
deployment.rb	text/x-ruby	3.19 KB	root/linksafe	0644	2025-08-20 02:36:28
deprecate.rb	text/x-ruby	876 B	root/linksafe	0644	2025-08-20 02:36:28
digest.rb	text/x-ruby	2.16 KB	root/linksafe	0644	2025-08-20 02:36:28
dsl.rb	text/x-ruby	19.97 KB	root/linksafe	0644	2025-08-20 02:36:28
endpoint_specification.rb	text/x-ruby	3.65 KB	root/linksafe	0644	2025-08-20 02:36:28
env.rb	text/x-ruby	5.01 KB	root/linksafe	0644	2025-08-20 02:36:28
environment_preserver.rb	text/x-ruby	1.94 KB	root/linksafe	0644	2025-08-20 02:36:28
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feature_flag.rb	text/x-ruby	1.79 KB	root/linksafe	0644	2025-08-20 02:36:28
fetcher.rb	text/x-ruby	11.19 KB	root/linksafe	0644	2025-08-20 02:36:28
force_platform.rb	text/x-ruby	557 B	root/linksafe	0644	2025-08-20 02:36:28
friendly_errors.rb	text/x-ruby	3.75 KB	root/linksafe	0644	2025-08-20 02:36:28
gem_helper.rb	text/x-ruby	6.89 KB	root/linksafe	0644	2025-08-20 02:36:28
gem_helpers.rb	text/x-ruby	4.08 KB	root/linksafe	0644	2025-08-20 02:36:28
gem_tasks.rb	text/plain	138 B	root/linksafe	0644	2025-08-20 02:36:28
gem_version_promoter.rb	text/x-ruby	4.76 KB	root/linksafe	0644	2025-08-20 02:36:28
graph.rb	text/x-ruby	4.99 KB	root/linksafe	0644	2025-08-20 02:36:28
index.rb	text/x-ruby	4.14 KB	root/linksafe	0644	2025-08-20 02:36:28
injector.rb	text/x-ruby	10.08 KB	root/linksafe	0644	2025-08-20 02:36:28
inline.rb	text/x-ruby	2.47 KB	root/linksafe	0644	2025-08-20 02:36:28
installer.rb	text/x-ruby	10.25 KB	root/linksafe	0644	2025-08-20 02:36:28
lazy_specification.rb	text/x-ruby	5.35 KB	root/linksafe	0644	2025-08-20 02:36:28
lockfile_generator.rb	text/x-ruby	2.18 KB	root/linksafe	0644	2025-08-20 02:36:28
lockfile_parser.rb	text/x-ruby	7.01 KB	root/linksafe	0644	2025-08-20 02:36:28
match_metadata.rb	text/x-ruby	290 B	root/linksafe	0644	2025-08-20 02:36:28
match_platform.rb	text/x-ruby	583 B	root/linksafe	0644	2025-08-20 02:36:28
match_remote_metadata.rb	text/x-ruby	863 B	root/linksafe	0644	2025-08-20 02:36:28
mirror.rb	text/x-ruby	5.78 KB	root/linksafe	0644	2025-08-20 02:36:28
plugin.rb	text/x-ruby	11.25 KB	root/linksafe	0644	2025-08-20 02:36:28
process_lock.rb	text/x-ruby	686 B	root/linksafe	0644	2025-08-20 02:36:28
remote_specification.rb	text/x-ruby	3.71 KB	root/linksafe	0644	2025-08-20 02:36:28
resolver.rb	text/x-ruby	14.62 KB	root/linksafe	0644	2025-08-20 02:36:28
retry.rb	text/x-ruby	1.61 KB	root/linksafe	0644	2025-08-20 02:36:28
ruby_dsl.rb	text/x-ruby	961 B	root/linksafe	0644	2025-08-20 02:36:28
ruby_version.rb	text/x-ruby	4.17 KB	root/linksafe	0644	2025-08-20 02:36:28
rubygems_ext.rb	text/x-ruby	10.88 KB	root/linksafe	0644	2025-08-20 02:36:28
rubygems_gem_installer.rb	text/x-ruby	5.24 KB	root/linksafe	0644	2025-08-20 02:36:28
rubygems_integration.rb	text/x-ruby	15.82 KB	root/linksafe	0644	2025-08-20 02:36:28
runtime.rb	text/x-ruby	10.15 KB	root/linksafe	0644	2025-08-20 02:36:28
safe_marshal.rb	text/x-ruby	597 B	root/linksafe	0644	2025-08-20 02:36:28
self_manager.rb	text/x-ruby	4.76 KB	root/linksafe	0644	2025-08-20 02:36:28
settings.rb	text/x-ruby	13.19 KB	root/linksafe	0644	2025-08-20 02:36:28
setup.rb	text/plain	963 B	root/linksafe	0644	2025-08-20 02:36:28
shared_helpers.rb	text/x-ruby	10.76 KB	root/linksafe	0644	2025-08-20 02:36:28
similarity_detector.rb	text/x-ruby	1.84 KB	root/linksafe	0644	2025-08-20 02:36:28
source.rb	text/x-ruby	2.98 KB	root/linksafe	0644	2025-08-20 02:36:28
source_list.rb	text/x-ruby	6.18 KB	root/linksafe	0644	2025-08-20 02:36:28
source_map.rb	text/x-ruby	2.17 KB	root/linksafe	0644	2025-08-20 02:36:28
spec_set.rb	text/x-ruby	5.08 KB	root/linksafe	0644	2025-08-20 02:36:28
stub_specification.rb	text/x-ruby	2.79 KB	root/linksafe	0644	2025-08-20 02:36:28
ui.rb	text/x-ruby	255 B	root/linksafe	0644	2025-08-20 02:36:28
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uri_normalizer.rb	text/x-ruby	715 B	root/linksafe	0644	2025-08-20 02:36:28
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vendored_uri.rb	text/plain	89 B	root/linksafe	0644	2025-08-20 02:36:28
version.rb	text/x-ruby	260 B	root/linksafe	0644	2025-08-20 02:36:28
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