read-http-img-data-from-https.js

var URL = 'http://gd1.alicdn.com/imgextra/i1/394695430/TB2d4w3cXXXXXc4XXXXXXXXXXXX_!!394695430.jpg';

var img = new Image();
img.onload = function() {
  var c = document.createElement('canvas');
  var w = c.width = img.width;
  var h = c.height = img.height;
  ctx = c.getContext('2d');
  ctx.drawImage(img, 0, 0);
  var data = ctx.getImageData(0, 0, w, h);
  console.log(data);
};
img.src = URL;
img.crossOrigin = true;