Dumps all Flox players as JSON files to a folder.

flox_dump_players.rb

#!/usr/bin/env ruby

require 'flox'
require 'fileutils'

GAME_ID  = 'xxx'
GAME_KEY = 'yyy'
HERO_KEY = 'zzz'
OUT_FOLDER = 'flox-players'
STEP_SIZE = 50

offset = 0
step = 0
player_count = 0

flox = Flox.new(GAME_ID, GAME_KEY)
flox.login_with_key(HERO_KEY)

FileUtils.mkdir_p OUT_FOLDER

query = Flox::Query.new(:Player)

loop do
  query.limit  = STEP_SIZE
  query.offset = STEP_SIZE * step
  results = flox.find_entities query

  results.each do |player|
    File.write("#{OUT_FOLDER}/#{player.id}.json",
      JSON.pretty_generate(player))
  end

  player_count += results.count
  if results.empty? then break
  else
    puts "Step #{step} - found #{results.count} players"
    step += 1
  end
end

puts "Found #{player_count} players."

Warning: this loads the players sequentially, so it can take a long time if you've got a big player database.
In that case, you should rather use the AS3 API, which loads all entities found by a single "query.find" in parallel. Either way, don't make STEP_SIZE too big.