4 files changed, 30 insertions, 10 deletions

diff --git a/application/ApplicationUtils.php b/application/ApplicationUtils.php
index 85dcbeeb..20fec376 100644
--- a/application/ApplicationUtils.php
+++ b/application/ApplicationUtils.php
@@ -220,4 +220,19 @@ class ApplicationUtils
 
         return $errors;
     }
+
+    /**
+     * Returns a salted hash representing the current Shaarli version.
+     *
+     * Useful for assets browser cache.
+     *
+     * @param string $currentVersion of Shaarli
+     * @param string $salt           User personal salt, also used for the authentication
+     *
+     * @return string version hash
+     */
+    public static function getVersionHash($currentVersion, $salt)
+    {
+        return hash_hmac('sha256', $currentVersion, $salt);
+    }
 }
diff --git a/application/PageBuilder.php b/application/PageBuilder.php
index 7a42400d..c91b662c 100644
--- a/application/PageBuilder.php
+++ b/application/PageBuilder.php
@@ -76,6 +76,10 @@ class PageBuilder
         $this->tpl->assign('searchcrits', $searchcrits);
         $this->tpl->assign('source', index_url($_SERVER));
         $this->tpl->assign('version', shaarli_version);
+        $this->tpl->assign(
+            'version_hash',
+            ApplicationUtils::getVersionHash(SHAARLI_VERSION, $this->conf->get('credentials.salt'))
+        );
         $this->tpl->assign('scripturl', index_url($_SERVER));
         $this->tpl->assign('privateonly', !empty($_SESSION['privateonly'])); // Show only private links?
         $this->tpl->assign('untaggedonly', !empty($_SESSION['untaggedonly']));
@@ -89,6 +93,7 @@ class PageBuilder
         $this->tpl->assign('feed_type', $this->conf->get('feed.show_atom', true) !== false ? 'atom' : 'rss');
         $this->tpl->assign('hide_timestamps', $this->conf->get('privacy.hide_timestamps', false));
         $this->tpl->assign('token', getToken($this->conf));
+
         if ($this->linkDB !== null) {
             $this->tpl->assign('tags', $this->linkDB->linksCountPerTag());
         }
diff --git a/tpl/default/includes.html b/tpl/default/includes.html
index 0350ef66..80c08333 100644
--- a/tpl/default/includes.html
+++ b/tpl/default/includes.html
@@ -5,16 +5,16 @@
 <link rel="alternate" type="application/atom+xml" href="{$feedurl}?do=atom{$searchcrits}#" title="ATOM Feed" />
 <link rel="alternate" type="application/rss+xml" href="{$feedurl}?do=rss{$searchcrits}#" title="RSS Feed" />
 <link href="img/favicon.png" rel="shortcut icon" type="image/png" />
-<link type="text/css" rel="stylesheet" href="css/pure.min.css" />
-<link type="text/css" rel="stylesheet" href="css/grids-responsive.min.css">
-<link type="text/css" rel="stylesheet" href="css/pure-extras.css">
-<link type="text/css" rel="stylesheet" href="css/font-awesome.min.css" />
-<link type="text/css" rel="stylesheet" href="inc/awesomplete.css#" />
-<link type="text/css" rel="stylesheet" href="css/shaarli.css" />
+<link type="text/css" rel="stylesheet" href="css/pure.min.css?v={$version_hash}" />
+<link type="text/css" rel="stylesheet" href="css/grids-responsive.min.css?v={$version_hash}">
+<link type="text/css" rel="stylesheet" href="css/pure-extras.css?v={$version_hash}">
+<link type="text/css" rel="stylesheet" href="css/font-awesome.min.css?v={$version_hash}" />
+<link type="text/css" rel="stylesheet" href="inc/awesomplete.css?v={$version_hash}#" />
+<link type="text/css" rel="stylesheet" href="css/shaarli.css?v={$version_hash}" />
 {if="is_file('data/user.css')"}
   <link type="text/css" rel="stylesheet" href="data/user.css#" />
 {/if}
 {loop="$plugins_includes.css_files"}
-  <link type="text/css" rel="stylesheet" href="{$value}#"/>
+  <link type="text/css" rel="stylesheet" href="{$value}?v={$version_hash}#"/>
 {/loop}
 <link rel="search" type="application/opensearchdescription+xml" href="?do=opensearch#" title="Shaarli search - {$shaarlititle}"/>
\ No newline at end of file
diff --git a/tpl/default/page.footer.html b/tpl/default/page.footer.html
index 94f771a2..54b16e8a 100644
--- a/tpl/default/page.footer.html
+++ b/tpl/default/page.footer.html
@@ -27,6 +27,6 @@
         <script src="{$value}#"></script>
 {/loop}
 
-<script src="js/shaarli.js"></script>
-<script src="inc/awesomplete.js#"></script>
-<script src="inc/awesomplete-multiple-tags.js#"></script>
+<script src="js/shaarli.js?v={$version_hash}"></script>
+<script src="inc/awesomplete.js?v={$version_hash}#"></script>
+<script src="inc/awesomplete-multiple-tags.js?v={$version_hash}#"></script>