From 0d8515deb750fe2a02ee6f9f12860caceed7248f Mon Sep 17 00:00:00 2001
From: Angie Byron <webchick@24967.no-reply.drupal.org>
Date: Tue, 3 Nov 2009 06:47:23 +0000
Subject: #552478 by pwolanin, samj, dropcube, and sun: Improve link/header API
 and support on node/comment pages rel=canonical and rel=shortlink standards.

---
 modules/node/node.module | 4 ++++
 1 file changed, 4 insertions(+)

(limited to 'modules/node/node.module')

diff --git a/modules/node/node.module b/modules/node/node.module
index 84cc776ff..735fc30c4 100644
--- a/modules/node/node.module
+++ b/modules/node/node.module
@@ -2152,6 +2152,10 @@ function node_page_view(stdClass $node) {
   if (isset($return['nodes'][$node->nid]['title'])) {
     drupal_set_title($return['nodes'][$node->nid]['title']['items'][0]['#item']['value']);
   }
+  // Set the node path as the canonical URL to prevent duplicate content.
+  drupal_add_html_head_link(array('rel' => 'canonical', 'href' => url('node/' . $node->nid)), TRUE);
+  // Set the non-aliased path as a default shortlink.
+  drupal_add_html_head_link(array('rel' => 'shortlink', 'href' => url('node/' . $node->nid, array('alias' => TRUE))), TRUE);
   return $return;
 }
 
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