From adc9a958afa5fb9f6f2dab4ae8abac1f932a7db4 Mon Sep 17 00:00:00 2001
From: Alexandre Alapetite <alexandre@alapetite.fr>
Date: Sun, 3 Nov 2013 20:28:52 +0100
Subject: Préchargement et requêtes conditionnelles HTTP/1.1
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Grosse amélioration des performances en utilisant le cache HTTP :
- Implémentation de HTTP/1.1, c.a.d. If-Modified-Since, If-None-Match,
If-Unmodified-Since, If-Match... avec la librairie
http://alexandre.alapetite.fr/doc-alex/php-http-304/
- Support de HEAD (HTTP /1.0).
- Préchargement de la page suivante (avec link next prefetch) dans le
cas de pagination.
- Et nouvelle possibilité de navigation pour les navigateurs qui
supportent "next".
- La date de dernier changement est pour l'instant primitive et
correspond au dernier changement de la session PHP ou
Configuration.array.php ou application.log ou touch.txt.
- touch.txt est modifié a chaque requête UPDATE ou INSERT ou DELETE.
---
 public/index.php       | 10 ++++++++++
 public/scripts/main.js |  5 +++++
 2 files changed, 15 insertions(+)

(limited to 'public')

diff --git a/public/index.php b/public/index.php
index 64aabb609..daf65c54a 100755
--- a/public/index.php
+++ b/public/index.php
@@ -28,6 +28,16 @@ define ('CACHE_PATH', realpath (PUBLIC_PATH . '/../cache'));
 if (file_exists (PUBLIC_PATH . '/install.php')) {
 	include ('install.php');
 } else {
+	session_cache_limiter('');
+	require (LIB_PATH . '/http-conditional.php');
+	$dateLastModification = max(filemtime(filemtime(PUBLIC_PATH . '/data/touch.txt'),
+		PUBLIC_PATH . '/data/Configuration.array.php'),
+		filemtime(LOG_PATH . '/application.log'),
+		time() - 3600);
+	if (httpConditional($dateLastModification, 0, 0, false, false, true)) {
+		exit();	//No need to send anything
+	}
+
 	set_include_path (get_include_path ()
 		         . PATH_SEPARATOR
 		         . LIB_PATH
diff --git a/public/scripts/main.js b/public/scripts/main.js
index 92259696f..19e2905cc 100644
--- a/public/scripts/main.js
+++ b/public/scripts/main.js
@@ -490,6 +490,11 @@ function init_load_more() {
 	}
 
 	url_load_more = $next_link.attr("href");
+	var $prefetch = $('#prefetch');
+	if ($prefetch.attr('href') !== url_load_more) {
+		$.ajax({url: url_load_more, ifModified: true });	//TODO: Try to find a less agressive solution
+		$prefetch.attr('href', url_load_more);
+	}
 
 	$next_link.click(function () {
 		load_more_posts();
-- 
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