fetch

# File lib/rubygems/request.rb, line 91
  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?

    perform_request request
  end