record user's history

snoopy.js

/*
 
1. Install dotjs (https://addons.mozilla.org/en-US/firefox/addon/dotjs/ for Firefox or https://github.com/defunkt/dotjs for Chrome)
2. Put the contents of this file at ~/.js/default.js
 
*/

const API_URL = 'http://localhost:7000/';

function getData(e, comment) {
    var data = new FormData();
    data.append('comment', comment);
    data.append('state', e.state ? JSON.stringify(e.state) : '');
    data.append('time', new Date().getTime());
    data.append('title', document.title);
    data.append('url', document.location.href);

    var xhr = new XMLHttpRequest();
    xhr.open('post', API_URL, true);
    xhr.send(data);
}

function newPage(e) {
    getData(e, 'page load');
}

function closePage(e) {
    getData(e, 'page close');
}

window.addEventListener('load', function(e) {
    // Synchronous page load.
    newPage(e);
}, false);

window.addEventListener('beforeunload', function(e) {
    // Closed tab.
    closePage(e);
}, false);

var currentUrl = document.location.href;

setInterval(function() {
    // New page pushed to history stack.
    if (currentUrl !== document.location.href) {
        currentUrl = document.location.href;
        newPage({state: 'pushState'}, 'page pushed');
    }
}, 200);