read WorldCup98 access log file in ruby see: http://ita.ee.lbl.gov/html/contrib/WorldCup.html

read_world_cup_access_log.rb

Entry = Struct.new(:timestamp, :clientID, :objectID, :size, :method, :status, :type, :server) do
  REGIONS = [:SantaClara, :Plano, :Herndon, :Paris]
  PROTOCOLS = [:HTTP_09, :HTTP_10, :HTTP_11, :HTTP_XX]
  METHODS = [:get, :head, :post, :put, :delete, :trace, :options, :connect, :other]
  STATUS_CODES = [100, 101, 200, 201, 202, 203, 204, 205, 206, 300, 301, 302, 303, 304, 305, 400, 401, 402, 403, 404, 405, 406, 407, 408, 409, 410, 411, 412, 413, 414, 415, 500, 501, 502, 503, 504, 505, :other]
  FILE_TYPES = [:html, :image, :audio, :video, :java, :formatted, :dynamic, :text, :compressed, :programs, :directory, :icl, :other]

  def self.parse(bytes)
    values = bytes.unpack("NNNNCCCC")
    entry = self.new
    entry.timestamp = Time.at(values[0])
    entry[:clientID], entry[:objectID], entry[:size] = values[1..3]
    entry[:method] = METHODS[values[4]]
    entry[:status] = {
      :protocol => PROTOCOLS[values[5] >> 6],
      :status_code => STATUS_CODES[values[5] & 0x3F]
    }
    entry[:type] = FILE_TYPES[values[6]]
    entry[:server] = {
      :region => REGIONS[values[7] >> 5],
      :server_number => (values[7] & 0x1F)
    }
    entry
  end
end

entries = []
File.open('/path/to/file/../for/example/wc_day61_1', 'rb') do |io|
  while byte_string = io.read(20)
    entries << Entry.parse(byte_string)
  end
end

entries.first
# => #<struct Entry
#  timestamp=1998-06-25 00:00:01 +0200,
#  clientID=6400,
#  objectID=24643,
#  size=872,
#  method=:get,
#  status={:protocol=>:HTTP_10, :status_code=>200},
#  type=:image,
#  server={:region=>:SantaClara, :server_number=>3}>