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ðŸ“„ psych_additions.rb(300 B)
ðŸ“„ psych_tree.rb(794 B)
ðŸ“„ rdoc.rb(523 B)
ðŸ“„ remote_fetcher.rb(11.38 KB)
ðŸ“ request
ðŸ“„ request.rb(8.69 KB)
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ðŸ“„ request_set.rb(11.93 KB)
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ðŸ“„ spec_fetcher.rb(6.51 KB)
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ðŸ“„ uri_formatter.rb(792 B)
ðŸ“„ user_interaction.rb(13.29 KB)
ðŸ“ util
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ðŸ“„ version.rb(12.22 KB)
ðŸ“„ version_option.rb(2.02 KB)

Editing: remote_fetcher.rb

# frozen_string_literal: true
require 'rubygems'
require 'rubygems/request'
require 'rubygems/uri_formatter'
require 'rubygems/user_interaction'
require 'rubygems/request/connection_pools'
require 'resolv'

##
# RemoteFetcher handles the details of fetching gems and gem information from
# a remote source.

class Gem::RemoteFetcher

include Gem::UserInteraction

##
  # A FetchError exception wraps up the various possible IO and HTTP failures
  # that could happen while downloading from the internet.

class FetchError < Gem::Exception

##
    # The URI which was being accessed when the exception happened.

attr_accessor :uri

def initialize(message, uri)
      super message
      begin
        uri = URI(uri)
        uri.password = 'REDACTED' if uri.password
        @uri = uri.to_s
      rescue URI::InvalidURIError, ArgumentError
        @uri = uri
      end
    end

def to_s # :nodoc:
      "#{super} (#{uri})"
    end

end

##
  # A FetchError that indicates that the reason for not being
  # able to fetch data was that the host could not be contacted

class UnknownHostError < FetchError
  end

@fetcher = nil

##
  # Cached RemoteFetcher instance.

def self.fetcher
    @fetcher ||= self.new Gem.configuration[:http_proxy]
  end

attr_accessor :headers

##
  # Initialize a remote fetcher using the source URI and possible proxy
  # information.
  #
  # +proxy+
  # * [String]: explicit specification of proxy; overrides any environment
  #             variable setting
  # * nil: respect environment variables (HTTP_PROXY, HTTP_PROXY_USER,
  #        HTTP_PROXY_PASS)
  # * <tt>:no_proxy</tt>: ignore environment variables and _don't_ use a proxy
  #
  # +headers+: A set of additional HTTP headers to be sent to the server when
  #            fetching the gem.

def initialize(proxy=nil, dns=nil, headers={})
    require 'net/http'
    require 'stringio'
    require 'time'
    require 'uri'

Socket.do_not_reverse_lookup = true

@proxy = proxy
    @pools = {}
    @pool_lock = Mutex.new
    @cert_files = Gem::Request.get_cert_files

@headers = headers
  end

##
  # Given a name and requirement, downloads this gem into cache and returns the
  # filename. Returns nil if the gem cannot be located.
  #--
  # Should probably be integrated with #download below, but that will be a
  # larger, more encompassing effort. -erikh

def download_to_cache(dependency)
    found, _ = Gem::SpecFetcher.fetcher.spec_for_dependency dependency

return if found.empty?

spec, source = found.max_by { |(s,_)| s.version }

download spec, source.uri.to_s
  end

##
  # Moves the gem +spec+ from +source_uri+ to the cache dir unless it is
  # already there.  If the source_uri is local the gem cache dir copy is
  # always replaced.

def download(spec, source_uri, install_dir = Gem.dir)
    cache_dir =
      if Dir.pwd == install_dir  # see fetch_command
        install_dir
      elsif File.writable? install_dir
        File.join install_dir, "cache"
      else
        File.join Gem.user_dir, "cache"
      end

gem_file_name = File.basename spec.cache_file
    local_gem_path = File.join cache_dir, gem_file_name

FileUtils.mkdir_p cache_dir rescue nil unless File.exist? cache_dir

# Always escape URI's to deal with potential spaces and such
    # It should also be considered that source_uri may already be
    # a valid URI with escaped characters. e.g. "{DESede}" is encoded
    # as "%7BDESede%7D". If this is escaped again the percentage
    # symbols will be escaped.
    unless source_uri.is_a?(URI::Generic)
      begin
        source_uri = URI.parse(source_uri)
      rescue
        source_uri = URI.parse(URI::DEFAULT_PARSER.escape(source_uri.to_s))
      end
    end

scheme = source_uri.scheme

# URI.parse gets confused by MS Windows paths with forward slashes.
    scheme = nil if scheme =~ /^[a-z]$/i

# REFACTOR: split this up and dispatch on scheme (eg download_http)
    # REFACTOR: be sure to clean up fake fetcher when you do this... cleaner
    case scheme
    when 'http', 'https', 's3' then
      unless File.exist? local_gem_path
        begin
          verbose "Downloading gem #{gem_file_name}"

remote_gem_path = source_uri + "gems/#{gem_file_name}"

self.cache_update_path remote_gem_path, local_gem_path
        rescue Gem::RemoteFetcher::FetchError
          raise if spec.original_platform == spec.platform

alternate_name = "#{spec.original_name}.gem"

verbose "Failed, downloading gem #{alternate_name}"

remote_gem_path = source_uri + "gems/#{alternate_name}"

self.cache_update_path remote_gem_path, local_gem_path
        end
      end
    when 'file' then
      begin
        path = source_uri.path
        path = File.dirname(path) if File.extname(path) == '.gem'

remote_gem_path = correct_for_windows_path(File.join(path, 'gems', gem_file_name))

FileUtils.cp(remote_gem_path, local_gem_path)
      rescue Errno::EACCES
        local_gem_path = source_uri.to_s
      end

verbose "Using local gem #{local_gem_path}"
    when nil then # TODO test for local overriding cache
      source_path = if Gem.win_platform? && source_uri.scheme &&
                       !source_uri.path.include?(':')
                      "#{source_uri.scheme}:#{source_uri.path}"
                    else
                      source_uri.path
                    end

source_path = Gem::UriFormatter.new(source_path).unescape

begin
        FileUtils.cp source_path, local_gem_path unless
          File.identical?(source_path, local_gem_path)
      rescue Errno::EACCES
        local_gem_path = source_uri.to_s
      end

verbose "Using local gem #{local_gem_path}"
    else
      raise ArgumentError, "unsupported URI scheme #{source_uri.scheme}"
    end

local_gem_path
  end

##
  # File Fetcher. Dispatched by +fetch_path+. Use it instead.

def fetch_file(uri, *_)
    Gem.read_binary correct_for_windows_path uri.path
  end

##
  # HTTP Fetcher. Dispatched by +fetch_path+. Use it instead.

def fetch_http(uri, last_modified = nil, head = false, depth = 0)
    fetch_type = head ? Net::HTTP::Head : Net::HTTP::Get
    response   = request uri, fetch_type, last_modified do |req|
      headers.each { |k,v| req.add_field(k,v) }
    end

case response
    when Net::HTTPOK, Net::HTTPNotModified then
      response.uri = uri if response.respond_to? :uri
      head ? response : response.body
    when Net::HTTPMovedPermanently, Net::HTTPFound, Net::HTTPSeeOther,
         Net::HTTPTemporaryRedirect then
      raise FetchError.new('too many redirects', uri) if depth > 10

unless location = response['Location']
        raise FetchError.new("redirecting but no redirect location was given", uri)
      end
      location = URI.parse response['Location']

if https?(uri) && !https?(location)
        raise FetchError.new("redirecting to non-https resource: #{location}", uri)
      end

fetch_http(location, last_modified, head, depth + 1)
    else
      raise FetchError.new("bad response #{response.message} #{response.code}", uri)
    end
  end

alias :fetch_https :fetch_http

##
  # Downloads +uri+ and returns it as a String.

def fetch_path(uri, mtime = nil, head = false)
    uri = URI.parse uri unless URI::Generic === uri

raise ArgumentError, "bad uri: #{uri}" unless uri

unless uri.scheme
      raise ArgumentError, "uri scheme is invalid: #{uri.scheme.inspect}"
    end

data = send "fetch_#{uri.scheme}", uri, mtime, head

if data and !head and uri.to_s =~ /\.gz$/
      begin
        data = Gem::Util.gunzip data
      rescue Zlib::GzipFile::Error
        raise FetchError.new("server did not return a valid file", uri.to_s)
      end
    end

data
  rescue FetchError
    raise
  rescue Timeout::Error
    raise UnknownHostError.new('timed out', uri.to_s)
  rescue IOError, SocketError, SystemCallError,
    *(OpenSSL::SSL::SSLError if defined?(OpenSSL)) => e
    if e.message =~ /getaddrinfo/
      raise UnknownHostError.new('no such name', uri.to_s)
    else
      raise FetchError.new("#{e.class}: #{e}", uri.to_s)
    end
  end

def fetch_s3(uri, mtime = nil, head = false)
    public_uri = sign_s3_url(uri)
    fetch_https public_uri, mtime, head
  end

##
  # Downloads +uri+ to +path+ if necessary. If no path is given, it just
  # passes the data.

def cache_update_path(uri, path = nil, update = true)
    mtime = path && File.stat(path).mtime rescue nil

data = fetch_path(uri, mtime)

if data == nil # indicates the server returned 304 Not Modified
      return Gem.read_binary(path)
    end

if update and path
      Gem.write_binary(path, data)
    end

data
  end

##
  # Returns the size of +uri+ in bytes.

def fetch_size(uri) # TODO: phase this out
    response = fetch_path(uri, nil, true)

response['content-length'].to_i
  end

def correct_for_windows_path(path)
    if path[0].chr == '/' && path[1].chr =~ /[a-z]/i && path[2].chr == ':'
      path[1..-1]
    else
      path
    end
  end

##
  # Performs a Net::HTTP request of type +request_class+ on +uri+ returning
  # a Net::HTTP response object.  request maintains a table of persistent
  # connections to reduce connect overhead.

def request(uri, request_class, last_modified = nil)
    proxy = proxy_for @proxy, uri
    pool  = pools_for(proxy).pool_for uri

request = Gem::Request.new uri, request_class, last_modified, pool

request.fetch do |req|
      yield req if block_given?
    end
  end

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

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

protected

# we have our own signing code here to avoid a dependency on the aws-sdk gem
  # fortunately, a simple GET request isn't too complex to sign properly
  def sign_s3_url(uri, expiration = nil)
    require 'base64'
    require 'openssl'

id, secret = s3_source_auth uri

expiration ||= s3_expiration
    canonical_path = "/#{uri.host}#{uri.path}"
    payload = "GET\n\n\n#{expiration}\n#{canonical_path}"
    digest = OpenSSL::HMAC.digest('sha1', secret, payload)
    # URI.escape is deprecated, and there isn't yet a replacement that does quite what we want
    signature = Base64.encode64(digest).gsub("\n", '').gsub(/[\+\/=]/) { |c| BASE64_URI_TRANSLATE[c] }
    URI.parse("https://#{uri.host}.s3.amazonaws.com#{uri.path}?AWSAccessKeyId=#{id}&Expires=#{expiration}&Signature=#{signature}")
  end

def s3_expiration
    (Time.now + 3600).to_i # one hour from now
  end

BASE64_URI_TRANSLATE = { '+' => '%2B', '/' => '%2F', '=' => '%3D' }.freeze

private

def proxy_for(proxy, uri)
    Gem::Request.proxy_uri(proxy || Gem::Request.get_proxy_from_env(uri.scheme))
  end

def pools_for(proxy)
    @pool_lock.synchronize do
      @pools[proxy] ||= Gem::Request::ConnectionPools.new proxy, @cert_files
    end
  end

def s3_source_auth(uri)
    return [uri.user, uri.password] if uri.user && uri.password

s3_source = Gem.configuration[:s3_source] || Gem.configuration['s3_source']
    host = uri.host
    raise FetchError.new("no s3_source key exists in .gemrc", "s3://#{host}") unless s3_source

auth = s3_source[host] || s3_source[host.to_sym]
    raise FetchError.new("no key for host #{host} in s3_source in .gemrc", "s3://#{host}") unless auth

id = auth[:id] || auth['id']
    secret = auth[:secret] || auth['secret']
    raise FetchError.new("s3_source for #{host} missing id or secret", "s3://#{host}") unless id and secret

[id, secret]
  end
end

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