How to Custom Header for Authorization access image

[rohmatmret]

Hello I have issue for use Custom Header Fetch image, how to custom header for get image ..?

getPageURI: function (index, reduce, rotate) {
    // reduce and rotate are ignored in this simple implementation, but we
    // could e.g. look at reduce and load images from a different directory
    // or pass the information to an image server
    var leafStr = "000";
    var imgStr = (index + 1).toString();
    var re = new RegExp("0{" + imgStr.length + "}$");
    var url =
      "http://archive.org/download/BookReader/img/page" +
      leafStr.replace(re, imgStr) +
      ".jpg";
    console.log("ini log url " + url);
    return url;
  },