Ruby script to send Apple push notifications

ios_push.rb

#! /usr/bin/env ruby
# Rafael Magana (rafmagana@gmail.com)

# chmod +x ios_push.rb (make the script executable)

# Usage: ./ios_push 'message to alert'

%w/logger socket openssl json/.each { |lib| require lib }

SSL         = OpenSSL::SSL
SSLContext  = SSL::SSLContext
SSLSocket   = SSL::SSLSocket
Certificate = OpenSSL::X509::Certificate
RSA         = OpenSSL::PKey::RSA

class Notifier

  def initialize(device_token)
    @device_token, @server, @port = device_token, 'gateway.sandbox.push.apple.com', 2195
    @logger = Logger.new 'notifications.log'
    @ssl, @tcp = connect
  end

  def connect
    cert = File.read 'your_certificate_here.pem'

    ssl_context       = SSLContext.new
    ssl_context.cert  = Certificate.new cert
    ssl_context.key   = RSA.new cert, '1234'

    tcp_socket = TCPSocket.new @server, @port
    ssl_socket = SSLSocket.new tcp_socket, ssl_context

    ssl_socket.connect

    [ssl_socket, tcp_socket]
  end

  def send(message)
    @ssl.write payload message
    @logger.info "Sent '#{message}' to device '#{@device_token[0..5]}...'"
    @ssl.close
    @tcp.close
  end

  def payload(m)
    aps = {}
    aps[:alert] = { :body => m, "action-loc-key" => "_button's text_" }
    aps[:badge] = 10
    aps[:sound] = 'default'
    @logger.info "Payload: #{aps}"
    binarize :aps => aps
  end

  def binarize(aps)
    j = JSON.dump aps
    "\0\0 #{[@device_token].pack('H*')}\0#{j.length.chr}#{j}"
  end

end

devices = %w/
    device_token_1
    device_token_2
    device_token_n/

devices.each do |token|
  Notifier.new(token).send ARGV.first
end