class FastImage

def initialize(uri, options={})
  @property = options[:type_only] ? :type : :size
  @timeout = options[:timeout] || DefaultTimeout
  @uri = uri
  begin
    @parsed_uri = URI.parse(uri)
  rescue URI::InvalidURIError
    fetch_using_open_uri
  else
    if @parsed_uri.scheme == "http" || @parsed_uri.scheme == "https"
      fetch_using_http
    else
      fetch_using_open_uri
    end
  end
  raise SizeNotFound if options[:raise_on_failure] && @property == :size && !@size
rescue Timeout::Error, SocketError, Errno::ECONNREFUSED, Errno::EHOSTUNREACH, Errno::ECONNRESET, 
  ImageFetchFailure, Net::HTTPBadResponse, EOFError, Errno::ENOENT
  raise ImageFetchFailure if options[:raise_on_failure]
rescue NoMethodError  # 1.8.7p248 can raise this due to a net/http bug
  raise ImageFetchFailure if options[:raise_on_failure]
rescue UnknownImageType
  raise UnknownImageType if options[:raise_on_failure]
end