Input file upload img file + HTML5 canvas by animate cc ?

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HTML5

Hello programmers (^_^)

In my work, I want a Browse button to insert an image in the browser
And save them in the form ?

The image appears at a specified width and height

by canvashtml in animate cc

What I have tried:

this.upload_button.addEventListener("click", fl_MouseClickHandler_3.bind(this));

function fl_MouseClickHandler_3() {
	var reader = new FileReader();
	reader.onload = function (event) {
		var dataUri = event.target.result,
			context = document.getElementById("mycanvas").getContext("2d"),
			img = new Image();

		img.onload = function () {
			context.drawImage(img, 100, 100);
		};
		img.src = dataUri;
		reader.readAsDataURL('file');
	}
}