Here is a javascript code I have tested successfully :
var txtFile = new XMLHttpRequest();
var allText = "file not found";
txtFile.onreadystatechange = function () {
if (txtFile.readyState === XMLHttpRequest.DONE && txtFile.status == 200) {
allText = txtFile.responseText;
allText = allText.split("\n").join("<br>");
}
document.getElementById('txt').innerHTML = allText;
}
txtFile.open("GET", '/result/client.txt', true);
txtFile.send(null);