Pirvate pub auth to be able to create a ruby client

private_pub_auth.rb

class PrivatePubAuth
  def initialize channel, secret
    @config = {
      timestamp: (Time.now.to_f * 1000).round,
      secret_token: secret,
      channel: channel
    }
  end

  def outgoing(message, callback)
    unless message['channel'] == '/meta/subscribe'
      return callback.call(message)
    end
    set_private_pub_auth(message)
    callback.call(message)
  end

  def set_private_pub_auth message
    message['ext'] ||= {}
    message['ext']['private_pub_timestamp'] = @config[:timestamp]
    message['ext']['private_pub_signature'] = signature
    message
  end

  private
    def signature
      Digest::SHA1.hexdigest([@config[:secret_token], @config[:channel], @config[:timestamp]].join)
    end
end

use.rb

require 'private_pub_auth'
require 'eventmachine'

# Server and secret_token can be found in private_pub.yml
server = 'http://localhost:9292/faye'
secret_token = 'secret'

client = Faye::Client.new(server)

# For each channel
channel = 'some/channel'
client.add_extension(PrivatePubAuth.new(channel, secret_token)) 

EM.run do
  client.subscribe(channel) do |message|
    puts 'Worked!'
  end
end