class Gem::Request

# File lib/rubygems/request.rb, line 12
def initialize(uri, request_class, last_modified, proxy)
  @uri = uri
  @request_class = request_class
  @last_modified = last_modified
  @requests = Hash.new 0
  @connections = {}
  @connections_mutex = Mutex.new
  @user_agent = user_agent

  @proxy_uri =
    case proxy
    when :no_proxy then nil
    when nil       then get_proxy_from_env uri.scheme
    when URI::HTTP then proxy
    else URI.parse(proxy)
    end
  @env_no_proxy = get_no_proxy_from_env
end

# File lib/rubygems/request.rb, line 31
def add_rubygems_trusted_certs(store)
  pattern = File.expand_path("./ssl_certs/*.pem", File.dirname(__FILE__))
  Dir.glob(pattern).each do |ssl_cert_file|
    store.add_file ssl_cert_file
  end
end

# File lib/rubygems/request.rb, line 38
def configure_connection_for_https(connection)
  require 'net/https'
  connection.use_ssl = true
  connection.verify_mode =
    Gem.configuration.ssl_verify_mode || OpenSSL::SSL::VERIFY_PEER
  store = OpenSSL::X509::Store.new

  if Gem.configuration.ssl_client_cert then
    pem = File.read Gem.configuration.ssl_client_cert
    connection.cert = OpenSSL::X509::Certificate.new pem
    connection.key = OpenSSL::PKey::RSA.new pem
  end

  store.set_default_paths
  add_rubygems_trusted_certs(store)
  if Gem.configuration.ssl_ca_cert
    if File.directory? Gem.configuration.ssl_ca_cert
      store.add_path Gem.configuration.ssl_ca_cert
    else
      store.add_file Gem.configuration.ssl_ca_cert
    end
  end
  connection.cert_store = store
rescue LoadError => e
  raise unless (e.respond_to?(:path) && e.path == 'openssl') ||
               e.message =~ / -- openssl$/

  raise Gem::Exception.new(
          'Unable to require openssl, install OpenSSL and rebuild ruby (preferred) or use non-HTTPS sources')
end

# File lib/rubygems/request.rb, line 73
def connection_for(uri)
  net_http_args = [uri.host, uri.port]

  if @proxy_uri and not no_proxy?(uri.host) then
    net_http_args += [
      @proxy_uri.host,
      @proxy_uri.port,
      Gem::UriFormatter.new(@proxy_uri.user).unescape,
      Gem::UriFormatter.new(@proxy_uri.password).unescape,
    ]
  end

  connection_id = [Thread.current.object_id, *net_http_args].join ':'

  connection = @connections_mutex.synchronize do
    @connections[connection_id] ||= Net::HTTP.new(*net_http_args)
    @connections[connection_id]
  end

  if https?(uri) and not connection.started? then
    configure_connection_for_https(connection)
  end

  connection.start unless connection.started?

  connection
rescue defined?(OpenSSL::SSL) ? OpenSSL::SSL::SSLError : Errno::EHOSTDOWN,
       Errno::EHOSTDOWN => e
  raise Gem::RemoteFetcher::FetchError.new(e.message, uri)
end

# File lib/rubygems/request.rb, line 104
def fetch
  request = @request_class.new @uri.request_uri

  unless @uri.nil? || @uri.user.nil? || @uri.user.empty? then
    request.basic_auth Gem::UriFormatter.new(@uri.user).unescape,
                       Gem::UriFormatter.new(@uri.password).unescape
  end

  request.add_field 'User-Agent', @user_agent
  request.add_field 'Connection', 'keep-alive'
  request.add_field 'Keep-Alive', '30'

  if @last_modified then
    request.add_field 'If-Modified-Since', @last_modified.httpdate
  end

  yield request if block_given?

  connection = connection_for @uri

  retried = false
  bad_response = false

  begin
    @requests[connection.object_id] += 1

    say "#{request.method} #{@uri}" if
      Gem.configuration.really_verbose

    file_name = File.basename(@uri.path)
    # perform download progress reporter only for gems
    if request.response_body_permitted? && file_name =~ /\.gem$/
      reporter = ui.download_reporter
      response = connection.request(request) do |incomplete_response|
        if Net::HTTPOK === incomplete_response
          reporter.fetch(file_name, incomplete_response.content_length)
          downloaded = 0
          data = ''

          incomplete_response.read_body do |segment|
            data << segment
            downloaded += segment.length
            reporter.update(downloaded)
          end
          reporter.done
          if incomplete_response.respond_to? :body=
            incomplete_response.body = data
          else
            incomplete_response.instance_variable_set(:@body, data)
          end
        end
      end
    else
      response = connection.request request
    end

    say "#{response.code} #{response.message}" if
      Gem.configuration.really_verbose

  rescue Net::HTTPBadResponse
    say "bad response" if Gem.configuration.really_verbose

    reset connection

    raise Gem::RemoteFetcher::FetchError.new('too many bad responses', @uri) if bad_response

    bad_response = true
    retry
  # HACK work around EOFError bug in Net::HTTP
  # NOTE Errno::ECONNABORTED raised a lot on Windows, and make impossible
  # to install gems.
  rescue EOFError, Timeout::Error,
         Errno::ECONNABORTED, Errno::ECONNRESET, Errno::EPIPE

    requests = @requests[connection.object_id]
    say "connection reset after #{requests} requests, retrying" if
      Gem.configuration.really_verbose

    raise Gem::RemoteFetcher::FetchError.new('too many connection resets', @uri) if retried

    reset connection

    retried = true
    retry
  end

  response
end

# File lib/rubygems/request.rb, line 196
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

# File lib/rubygems/request.rb, line 208
def get_proxy_from_env scheme = 'http'
  _scheme = scheme.downcase
  _SCHEME = scheme.upcase
  env_proxy = ENV["#{_scheme}_proxy"] || ENV["#{_SCHEME}_PROXY"]

  no_env_proxy = env_proxy.nil? || env_proxy.empty?

  return get_proxy_from_env 'http' if no_env_proxy and _scheme != 'http'
  return nil                       if no_env_proxy

  uri = URI(Gem::UriFormatter.new(env_proxy).normalize)

  if uri and uri.user.nil? and uri.password.nil? then
    user     = ENV["#{_scheme}_proxy_user"] || ENV["#{_SCHEME}_PROXY_USER"]
    password = ENV["#{_scheme}_proxy_pass"] || ENV["#{_SCHEME}_PROXY_PASS"]

    uri.user     = Gem::UriFormatter.new(user).escape
    uri.password = Gem::UriFormatter.new(password).escape
  end

  uri
end

# File lib/rubygems/request.rb, line 231
def https?(uri)
  uri.scheme.downcase == 'https'
end

# File lib/rubygems/request.rb, line 235
def no_proxy? host
  host = host.downcase
  @env_no_proxy.each do |pattern|
    pattern = pattern.downcase
    return true if host[-pattern.length, pattern.length ] == pattern
  end
  return false
end

# File lib/rubygems/request.rb, line 247
def reset(connection)
  @requests.delete connection.object_id

  connection.finish
  connection.start
end

# File lib/rubygems/request.rb, line 254
def user_agent
  ua = "RubyGems/#{Gem::VERSION} #{Gem::Platform.local}"

  ruby_version = RUBY_VERSION
  ruby_version += 'dev' if RUBY_PATCHLEVEL == -1

  ua << " Ruby/#{ruby_version} (#{RUBY_RELEASE_DATE}"
  if RUBY_PATCHLEVEL >= 0 then
    ua << " patchlevel #{RUBY_PATCHLEVEL}"
  elsif defined?(RUBY_REVISION) then
    ua << " revision #{RUBY_REVISION}"
  end
  ua << ")"

  ua << " #{RUBY_ENGINE}" if defined?(RUBY_ENGINE) and RUBY_ENGINE != 'ruby'

  ua
end