class Nokogiri::XML::SAX::Parser

to set options on the parser context before parsing begins.
If a block is given, the underlying ParserContext object will be yielded. This can be used
[Yields]

otherwise it forwards to Parser.parse_memory.
If +input+ quacks like a readable IO object, this method forwards to Parser.parse_io,

- +input+ (String, IO) The input to parse.
[Parameters]

Parse the input, sending events to the SAX::Document at #document.

parse(input) { |parser_context| ... }
:call-seq:
##

def parse(input, &block)
  if input.respond_to?(:read) && input.respond_to?(:close)
    parse_io(input, &block)
  else
    parse_memory(input, &block)
  end
end