将图片地址写以二进制写到文档里

Script
function writeImageToDoc(url) {
  var image = new Image();

  image.src = url;

  image.onload = function() {
    var canvas = document.createElement("canvas");
    canvas.width = image.width;
    canvas.height = image.height;

    var context = canvas.getContext("2d");
    context.drawImage(this, 0, 0, image.width, image.height);

    var dataURL = canvas.toDataURL("image/png");

    document.write(dataURL);
  };
}