Restore deleted zeroed (deleted) files in Dropbox

recover_corrupted_files.rb

## gem install dropbox-api
##### Dropbox
require 'dropbox-api'
## for client config: 
## create Rakefile
>require "dropbox-api/tasks"
>Dropbox::API::Tasks.install
## execute: rake dropbox:authorize

Dropbox::API::Config.app_key    = YOUR_API_KEY
Dropbox::API::Config.app_secret = YOUR_SECRET_KEY
Dropbox::API::Config.mode       = "dropbox"

## see steps for rake authorization! 
client = Dropbox::API::Client.new(:token  => 'some_token', :secret => 'some_secret')


Dir.chdir("/path/to/Dropbox")
files = Dir["**/**"]; nil
deleted_files =  files.map{|x| File.size(x) == 0 ? x : nil}.compact!.sort; nil


deleted_files.each do |filename|
  begin
    file = client.find(filename)
    revs =  file.revisions
    puts "#{filename}: #{revs.size} revs"
    if revs.size > 0
      good_revision = revs.find{|x| x.bytes > 0 }
      puts "restoring #{filename} to rev #{good_revision.rev}"
      file.restore(good_revision.rev)
    end
  rescue Exception => e
    puts "ERROR #{e.message}, #{e.backtrace}"
  end
end

### DONE!