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Edit File : remote_fetcher.rb \| Size : 9.20 KB
# frozen_string_literal: true require_relative "../rubygems" require_relative "request" require_relative "request/connection_pools" require_relative "s3_uri_signer" require_relative "uri_formatter" require_relative "uri" require_relative "user_interaction" ## # 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, :original_uri def initialize(message, uri) uri = Gem::Uri.new(uri) super uri.redact_credentials_from(message) @original_uri = uri.to_s @uri = uri.redacted.to_s 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 deprecate_constant(:UnknownHostError) @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_relative "core_ext/tcpsocket_init" if Gem.configuration.ipv4_fallback_enabled require "net/http" require "stringio" require "uri" Socket.do_not_reverse_lookup = true @proxy = proxy @pools = {} @pool_lock = Thread::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 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) install_cache_dir = File.join install_dir, "cache" cache_dir = if Dir.pwd == install_dir # see fetch_command install_dir elsif File.writable?(install_cache_dir) \|\| (File.writable?(install_dir) && (!File.exist?(install_cache_dir))) install_cache_dir 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 require "fileutils" FileUtils.mkdir_p cache_dir rescue nil unless File.exist? cache_dir source_uri = Gem::Uri.new(source_uri) 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 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 = Gem::Util.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 Gem::Util.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 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 = Gem::Uri.new 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 = Gem::Uri.new uri unless uri.scheme raise ArgumentError, "uri scheme is invalid: #{uri.scheme.inspect}" end data = send "fetch_#{uri.scheme}", uri, mtime, head if data && !head && uri.to_s.end_with?(".gz") begin data = Gem::Util.gunzip data rescue Zlib::GzipFile::Error raise FetchError.new("server did not return a valid file", uri) end end data rescue Timeout::Error, IOError, SocketError, SystemCallError, (OpenSSL::SSL::SSLError if Gem::HAVE_OPENSSL) => e raise FetchError.new("#{e.class}: #{e}", uri) end def fetch_s3(uri, mtime = nil, head = false) begin public_uri = s3_uri_signer(uri).sign rescue Gem::S3URISigner::ConfigurationError, Gem::S3URISigner::InstanceProfileError => e raise FetchError.new(e.message, "s3://#{uri.host}") end fetch_https public_uri, mtime, head end # we have our own signing code here to avoid a dependency on the aws-sdk gem def s3_uri_signer(uri) Gem::S3URISigner.new(uri) 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 && path Gem.write_binary(path, data) end data 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 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 end Back

Edit File : remote_fetcher.rb | Size : 9.20 KB

# frozen_string_literal: true

require_relative "../rubygems"
require_relative "request"
require_relative "request/connection_pools"
require_relative "s3_uri_signer"
require_relative "uri_formatter"
require_relative "uri"
require_relative "user_interaction"

##
# 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, :original_uri

def initialize(message, uri)
      uri = Gem::Uri.new(uri)

super uri.redact_credentials_from(message)

@original_uri = uri.to_s
      @uri = uri.redacted.to_s
    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
  deprecate_constant(:UnknownHostError)

@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_relative "core_ext/tcpsocket_init" if Gem.configuration.ipv4_fallback_enabled
    require "net/http"
    require "stringio"
    require "uri"

Socket.do_not_reverse_lookup = true

@proxy = proxy
    @pools = {}
    @pool_lock = Thread::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
  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)
    install_cache_dir = File.join install_dir, "cache"
    cache_dir =
      if Dir.pwd == install_dir # see fetch_command
        install_dir
      elsif File.writable?(install_cache_dir) || (File.writable?(install_dir) && (!File.exist?(install_cache_dir)))
        install_cache_dir
      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

require "fileutils"
    FileUtils.mkdir_p cache_dir rescue nil unless File.exist? cache_dir

source_uri = Gem::Uri.new(source_uri)

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 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 = Gem::Util.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 Gem::Util.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
      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 = Gem::Uri.new 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 = Gem::Uri.new uri

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

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

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

data
  rescue Timeout::Error, IOError, SocketError, SystemCallError,
         *(OpenSSL::SSL::SSLError if Gem::HAVE_OPENSSL) => e
    raise FetchError.new("#{e.class}: #{e}", uri)
  end

def fetch_s3(uri, mtime = nil, head = false)
    begin
      public_uri = s3_uri_signer(uri).sign
    rescue Gem::S3URISigner::ConfigurationError, Gem::S3URISigner::InstanceProfileError => e
      raise FetchError.new(e.message, "s3://#{uri.host}")
    end
    fetch_https public_uri, mtime, head
  end

# we have our own signing code here to avoid a dependency on the aws-sdk gem
  def s3_uri_signer(uri)
    Gem::S3URISigner.new(uri)
  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 && path
      Gem.write_binary(path, data)
    end

data
  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

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
end

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