urlobserver.user.js

// ==UserScript==
// @name        URL Observer Addon
// @namespace   anon
// @match       http://*/*
// @match       https://*/*
// @exclude     http://localhost/*
// @version     2
// @require     http://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js
// @grant       GM_info
// @grant       metadata
// @grant       GM_xmlhttpRequest
// @run-at      document-end
// ==/UserScript==

window.addEventListener("load", Greasemonkey_main, false);
function Greasemonkey_main () {
	function GM_main ($) {
		//alert ('jQuery is installed with no conflicts! The version is: ' + $.fn.jquery);
	}

	if (typeof jQuery === "function") {
		console.log ("Running with local copy of jQuery!");
		GM_main (jQuery);
	}
	else {
		console.log ("fetching jQuery from some 3rd-party server.");
		add_jQuery (GM_main, "1.7.2");
	}

	function add_jQuery (callbackFn, jqVersion) {
		var jqVersion   = jqVersion || "1.7.2";
		var D           = document;
		var targ        = D.getElementsByTagName ('head')[0] || D.body || D.documentElement;
		var scriptNode  = D.createElement ('script');
		scriptNode.src  = 'http://ajax.googleapis.com/ajax/libs/jquery/'
						+ jqVersion
						+ '/jquery.min.js'
						;
		scriptNode.addEventListener ("load", function () {
			var scriptNode          = D.createElement ("script");
			scriptNode.textContent  =
				'var gm_jQuery  = jQuery.noConflict (true);\n'
				+ '(' + callbackFn.toString () + ')(gm_jQuery);'
			;
			targ.appendChild (scriptNode);
		}, false);
		targ.appendChild (scriptNode);
	}

	var links = document.links;
	var aLen = links.length;
	var href = [];
	for (var i = 0; i < aLen; i++)
	{
		href.push(links[i].href);
		//console.log(href);
	}
	var hrefs = JSON.stringify(href);
	console.log(hrefs);

	GM_xmlhttpRequest({
	  method: "POST",
	  url: "http://localhost/webhooks/urls.php",
	  data: hrefs,
	  headers: { 'Content-Type': 'application/json; charset=UTF-8' },
	  onload: function(response) {
		  console.log('gm:' + r.responseText);
	  }
	});
}

urls.php

<?php
# I trust I need not explain this?
mysql_connect('localhost', '', '');
mysql_select_db('my_index');

$data = file_get_contents("php://input");
$urls = json_decode($data);
foreach($urls as $url)
{
	$host   = parse_url($url, PHP_URL_HOST);
	$domain = mysql_real_escape_string($host);
	$hash   = md5($url);
	$url    = mysql_real_escape_string($url);
	mysql_query("INSERT IGNORE INTO urls (url,hash,host) VALUES ('$url','$hash','$domain') ON DUPLICATE KEY UPDATE url='$url'");
}