dagingaa

// javascript
var takeSnapshot = function (clientId) {
   var videoElem = document.getElementById(clientId);
   var canvas = document.getElementById(“chat-paint-canvas”);
   var ctx = canvas.getContext(‘2d’);
   ctx.drawImage(videoElem, 0, 0, 30, 30);
   return canvas.toDataURL();
};

// html

dagingaa

require 'sinatra'
require 'open-uri'
require 'json'

# This application is the bare minimum to authorize with OAuth 2.0
# using the authorization grant scheme. No error handling included.
# The application is both a client and a resource server. 
# Start it by using 'ruby <file>' and navigate to http://localhost:4567
#
# The application also needs the oauth-server written in Java.