Ruby: URL-to-Hash & Query-to-Hash

ruby-url-to-hash-and-query-to-hash.rb

RX_URL = Regexp.new('^((?<protocol>https?):\/\/)?(?<host>[^\/]+)(\/(?<path>[^\?#]+))?(\?(?<query>[^#]+))?(#(?<fragment>.*))?', 'i')

# @see http://stackoverflow.com/questions/18825669/how-to-do-named-capture-in-ruby#18825787
# @param  url_str [String]  URL string with or without `https://`, `http://`
# @return         [Hash]    hash with keys: `:protocol, :host, :path, :query, :fragment`
def url_to_hash(url_str)
  m = url_str.match(RX_URL)
  m.names.map(&:to_sym).zip(m.captures).to_h
end

# @see http://stackoverflow.com/questions/2500462/how-to-extract-url-parameters-from-a-url-with-ruby-or-rails#25598247
# @see http://ruby-doc.org/stdlib-2.1.0/libdoc/uri/rdoc/URI.html#method-c-decode_www_form
def query_to_hash(query_str)
  URI::decode_www_form(query_str).each_with_object({}) {|(k,v),h| h[k.to_sym] = v}
end