_httpdate

# File lib/date/format.rb, line 1195
  def self._httpdate(str) # :nodoc:
    if /\A\s*(#{Format::ABBR_DAYS.keys.join('|')})\s*,\s+
        \d{2}\s+
        (#{Format::ABBR_MONTHS.keys.join('|')})\s+
        -?\d{4}\s+ # allow minus, anyway
        \d{2}:\d{2}:\d{2}\s+
        gmt\s*\z/ox =~ str
      _rfc2822(str)
    elsif /\A\s*(#{Format::DAYS.keys.join('|')})\s*,\s+
        \d{2}\s*-\s*
        (#{Format::ABBR_MONTHS.keys.join('|')})\s*-\s*
        \d{2}\s+
        \d{2}:\d{2}:\d{2}\s+
        gmt\s*\z/ox =~ str
      _parse(str)
    elsif /\A\s*(#{Format::ABBR_DAYS.keys.join('|')})\s+
        (#{Format::ABBR_MONTHS.keys.join('|')})\s+
        \d{1,2}\s+
        \d{2}:\d{2}:\d{2}\s+
        \d{4}\s*\z/ox =~ str
      _parse(str)
    end
  end