rfb2

node-rfb2

RFB wire protocol client and server

var rfb = require('rfb2');
var r = rfb.createConnection({
  host: '127.0.0.1',
  port: 5900,
  password: 'secret'
});
 
r.on('connect', function() {
  console.log('successfully connected and authorised');
  console.log('remote screen name: ' + r.title + ' width:' + r.width + ' height: ' + r.height);
});
 
r.on('error', function(error) {
  throw new Error(error);
});
 
r.pointerEvent(100, 100, 0); // x, y, button state (bit mask for each mouse button)
r.keyEvent(40, 0);           // keycode, is down?
r.updateClipboard('send text to remote clipboard');
 
// screen updates
r.on('rect', function(rect) {
   switch(rect.encoding) {
   rfb.encodings.raw:
      // rect.x, rect.y, rect.width, rect.height, rect.data
      // pixmap format is in r.bpp, r.depth, r.redMask, greenMask, blueMask, redShift, greenShift, blueShift
   rfb.encodings.copyRect:
      // pseudo-rectangle
      // copy rectangle from rect.src.x, rect.src.y, rect.width, rect.height, to rect.x, rect.y
   rfb.encodings.hextile:
      // not fully implemented
      rect.on('tile', handleHextileTile); // emitted for each subtile
   }
});
 
r.on('resize', function(rect) {
  console.log('window size has been resized! Width: %s, Height: %s', rect.width, rect.height);
});
 
r.on('clipboard', function(newPasteBufData) {
  console.log('remote clipboard updated!', newPasteBufData);
});
 
r.on('bell', console.log.bind(null, 'Bell!!'));
 
// force update
// updates are requested automatically after each new received update
// you may want to have more frequent updates for high latency / high bandwith connection
r.requestUpdate(false, 0, 0, r.width, r.height); // incremental?, x, y, w, h
 
r.end(); // close connection
 

Status:

Ready

• pointer, keyboard, cutText, requestUpdate client messages
• colormap, bell, cutText server messages
• Raw FB update encoding
• pseudoDesktopSize and copyRect pseudo rect updates
• record/replay to/from file

In progress:

• Hextile encoding support
• Server side protocol

TODO:

• ZRle, RRE, CoRRE, Zlib, Tight encodings
• ARD and MS security types
• VNC server with x11 and COMPOSITE/DAMAGE extensions

see also:

• node-rfb - Substack's implementation of rfb protocol.
• VNC client on 200 lines of JavaScript - blog post and HTML5 client using node-rfb2
• Vnc-over-gif - vnc to gif proxy server. Stream your screen to animated gif image!
• rfbrecord - stream VNC connection to video file
• ANSI-vnc - terminal vnc client.
• node-vnc - graphical vnc client for X Window graphics using node X11 client.
• vnc.js - LinkedIn intern hackday 2011 project
• rdpy - rfb and rdp implementation in python