Upload text file that does not exist

gistfile1.js

    (function() {

        var button = document.getElementById("TestUpload");

        function setupRequest() {
            var xhr = new XMLHttpRequest();

            xhr.open('POST', "/home/upload", true);
            xhr.setRequestHeader("Accept", "application/json");

            return xhr;
        }


        button.addEventListener("click", function () {
            var xhr = setupRequest();

            var formData = new FormData();

            var text = ['RAWRRRRRRRRRR'];
            var file = new Blob(text, { type: 'plain/text' });

            formData.append("banana.txt", file);
            xhr.send(formData);
        });

    }());

gistfile2.html

        <button id="TestUpload">Test Upload</button>