Sends an Apple Push Notification with Ruby

apns.rb

require "rubygems"
require "yajl"
require "openssl"
require "socket"

device_token = '39cac56f 986a0e66 3c4fd4f4 68df5598 024d2ca3 8b9f307c 741c180e 9fc30c62'
device_token = device_token.gsub(" ", "")
the_byte_token = [device_token].pack("H*")

file = File.open("ruby_the_byte_token", "wb")
file.print(the_byte_token)
file.close

the_beginning = [0, 0, 32].pack("ccc")

file = File.open("ruby_the_beginning", "wb")
file.print(the_beginning)
file.close

def the_payload
  payload = Hash.new
  payload['aps'] = Hash.new
  payload['aps']['alert'] = "Ruby - Oh no! Server\'s Down!"
  payload['aps']['sound'] = 'k1DiveAlarm.caf'
  payload['aps']['badge'] = 42
  payload['test_data'] = {'foo' => 'bar'}
  Yajl::Encoder.encode(payload)
end

the_notification = [0, 0, 32, the_byte_token, 0, the_payload.length, the_payload].pack("ccca*cca*")
file = File.open("ruby_the_notification", "wb")
file.print(the_notification)
file.close

def connect
  cert = File.read('cert_ios_production.pem')
  ctx = OpenSSL::SSL::SSLContext.new
  ctx.key = OpenSSL::PKey::RSA.new(cert, nil)
  ctx.cert = OpenSSL::X509::Certificate.new(cert)
  sock = TCPSocket.new('gateway.push.apple.com', 2195)
  ssl = OpenSSL::SSL::SSLSocket.new(sock, ctx)
  ssl.connect
  return ssl, sock
end

def write(ssl, sock, the_notification)
  ssl.write(the_notification)
  ssl.flush
  if IO.select([ssl], nil, nil, 1)
    error = ssl.read(6)
    if error
      error = error.unpack("ccN")
      puts "ERROR: #{error}"
    else
      puts "NO ERROR"
    end
  end
end

def close(ssl, sock)
  ssl.close
  sock.close
end

ssl, sock = connect
write(ssl, sock, the_notification)
close(ssl, sock)