Greasemonkey Script for Facebook HTTPS

facebook-https.js

// ==UserScript==
// @name           Facebook HTTPS-ifier
// @namespace      Facebook
// @description    Converts all links pointing to Facebook to use HTTPS.
// @author         Mikolaj "D1SoveR" Banasik
// @include        http://*facebook.com/*
// @include        https://*facebook.com/*
// @match          http://*facebook.com/*
// @match          https://*facebook.com/*
// ==/UserScript==

(function () {

	/* If Facebook page is not using HTTPS protocol,
     * switch it to HTTPS as soon as possible.
	 */
	if (window.location.protocol === "http:") {
		 
		var newLoc = window.location.href;
		newLoc = newLoc.replace(/^http:/i, "https:");
		window.location.replace(newLoc);
	
	/* If Facebook page's already going through the
	 * secure protocol, make sure all the internal links
	 * are leading to HTTPS location as well.
	 */
	} else {
		
		// Links
		var links = document.getElementsByTagName("a");
		for (var i = 0; i < links.length; i++) {

			if (links[i].href.match(/^http:\/\/(?:[a-zA-Z0-9]+\.)?facebook\.com/i)) {
				links[i].href = links[i].href.replace(/^http:/i, "https:");
			}
			
		}
		
		// Forms
		var forms = document.getElementsByTagName("form");
		for (var i = 0; i < forms.length; i++) {

			if (forms[i].action.match(/^http:\/\/(?:[a-zA-Z0-9]+\.)?facebook\.com/i)) {
				forms[i].action = forms[i].action.replace(/^http:/i, "https:");
			}
			
		}
		
	}

})();