prevent google duplicate content

Author: lovasoa

examples/official-site/examples/authentication/basic_auth.sql

@@ -1,3 +1,5 @@
+select 'http_header' as component, 'noindex' as "X-Robots-Tag";
+
 SELECT 'authentication' AS component,
     case sqlpage.basic_auth_username()
         when 'admin'

examples/official-site/examples/layouts.sql

@@ -1,3 +1,5 @@
+select 'http_header' as component, 'nofollow' as "X-Robots-Tag"; -- nofollow to avoid duplicate content
+
 set layout = coalesce($layout, 'boxed');
 set sidebar = coalesce($sidebar, 0);
 

examples/official-site/index.sql

@@ -1,5 +1,6 @@
-select 'http_header' as component, 'public, max-age=600, stale-while-revalidate=3600, stale-if-error=86400' as "Cache-Control";
-select 'redirect' as component, '/' as link where sqlpage.path() <> '/';
+select 'http_header' as component,
+    'public, max-age=600, stale-while-revalidate=3600, stale-if-error=86400' as "Cache-Control",
+    '<https://sql.datapage.app/>; rel="canonical"' as "Link";
 
 -- Fetch the page title and header from the database
 select 'dynamic' as component, properties FROM example WHERE component = 'shell' LIMIT 1;