class UniversalDomRemote

Public Class Methods

new(debug: false) click to toggle source

Calls superclass method

# File lib/universal_dom_remote.rb, line 14
def initialize(debug: false)

  super(host: '127.0.0.1', port: '55000', topic: 'udr', 
               sub_topic: 'browser', pub_topic: 'controller')

  @debug = debug
  @received = []

end

Public Instance Methods

javascript() click to toggle source

A helpful method to generate the javascript code necessary for the web browser to communicate with the universal DOM remote

# File lib/universal_dom_remote.rb, line 27
  def javascript()

"
var ws = new WebSocket('ws://127.0.0.1:55000/');
ws.onopen = function() {
  console.log('CONNECT');
  ws.send('subscribe to topic: udr/controller');
};
ws.onclose = function() {
  console.log('DISCONNECT');
};
ws.onmessage = function(event) {

  var a = event.data.split(/: +/,2);
  console.log(a[1]);

  try {
    r = eval(a[1]);
  }
  catch(err) {
    r = err.message;
  }

  ws.send('udr/browser: ' + r);

};
"

  end

ontopic(topic, msg) click to toggle source

used by the callback routine

# File lib/universal_dom_remote.rb, line 59
def ontopic(topic, msg)
  
  a = topic.split('/')
  sender = a.pop

  puts "%s: %s" % [sender, msg] if @debug
  @received << msg    

end

send(s, timeout: 30) click to toggle source

send the instruction to the web browser

Calls superclass method

# File lib/universal_dom_remote.rb, line 71
def send(s, timeout: 30)

  t = Time.now + timeout
  
  super(s)

  sleep 0.1 until @received.any? or Time.now > t
  raise UniversalDomRemoteException, 'recv::timeout' if Time.now > t

  r = @received.last
  @received = []

  return r
end