(File System APIの）imgファイルをxhr2でサーバーにuploadするスクリプト

uploadimage.js

$("<canvas>").appendTo("body");
var canvas = $("canvas")[0]
  , ctx = canvas.getContext('2d')

canvas.width = 640, canvas.height = 480;

for(var i = 0, l = ent.length; i < l; i++) {
	var imgURL = ent[i];

	var img = new Image();
	img.src = imgURL;

	img.onload = function(e){
		console.log(this.src)
		ctx.drawImage(this, 0, 0);
		var dataURL = canvas.toDataURL();
		console.log(dataURL);

		var name_ = this.src.split("/").slice(-1)[0]

		$.post('http://localhost:3000/upload', {name:name_, data: dataURL})
	}
}