# Need to not fail when uri contains curly braces
# This overrides the DEFAULT_PARSER with the UNRESERVED key, including '{' and '}'
# DEFAULT_PARSER is used everywhere, so its better to override it once
module URI
  remove_const :DEFAULT_PARSER
  unreserved = REGEXP::PATTERN::UNRESERVED
  DEFAULT_PARSER = Parser.new(:UNRESERVED => unreserved + "\{\}")
end

由于出现了同样的问题，由于DEFAULT_PARSER随处可见，因此***完全替换为URI#parse方法.此外，这避免了每次为新的Parser对象的实例化分配内存.

Following up the same issue, since DEFAULT_PARSER is used everywhere, its better to substitute it completely insted of just for the URI#parse method. Additionally this avoids allocating memory for the instantiation of a new Parser object every time.