Responsive Weiterleitungen und "Vary HTTP header" um Google-Ban zu vermeiden

Jeder Webmaster weiss es, Google mag Duplicate-Content überhaupt nicht. Aber was machen wir, wenn wir für Smartphone-Users andere und für Tablet User andere und für PC-Users andere Sites mit gleichen Content haben?

Die Lösung ist "HTTP header: Vary" und rel="alternate".

Mehr dazu gibt es offiziell hier:
https://developers.google.com/webmasters/smartphone-sites/redirects

Ein Beispiel :

GET /meine-unter-seite-1 HTTP/1.1
Host: www.itlantik.de
User-Agent: Mozilla/4.0 (Firefox ...

HTTP/1.1 200 OK
Content-Type: text/html
Vary: User-Agent
Content-Length: 12540

Google
GoogleBot

Neuen Kommentar schreiben

Hilfe zum Textformat
CAPTCHA
This question is for testing whether or not you are a human visitor and to prevent automated spam submissions.

Suche

Neueste Kommentare

  • Wildcard

    1 month 2 weeks ago
    How to Renew Let’s Encrypt SSL Certificate on Plesk via Ubuntu Shell

    Let’s Encrypt will only accept a wildcard via DNS challenge. 

    If your Plesk instance can’t create the _acme-challenge.example.com TXT (external DNS), the extension can’t complete validation and will show no success. 

  • Same problem

    1 month 3 weeks ago
    Warning: Undefined array key "url" in Drupal\Core\Asset\CssCollectionOptimizerLazy->optimizeGroup() 
    Warning: Undefined array key "url" in Drupal\Core\Asset\JsCollectionOptimizerLazy->optimizeGroup()

  • set-timezone Europe/Berlin

    1 month 3 weeks ago
    Server install & config : Debian 12 + Plesk + Apache + nginx + MariaDB + Solr
    sudo timedatectl set-timezone Europe/Berlin

  • Try this:1. Go to  Tools &…

    2 months ago
    Warning: PHP Startup: Unable to load dynamic library 'apcu.so' ... cannot open shared object file: No such file or directory

    Try this:

  • Alternative (without warnings like "no crontab for user")

    2 months 2 weeks ago
    List Cronjobs for all users (via for + crontab)

    Alternative (without warnings like "no crontab for dovecot") to see all tasks:

  • php 8.3 apcu

    2 months 2 weeks ago
    Install APCu (PHP 8.1, Plesk)

    php 8.3 apcu failed

    über Plesk hat es geklappt.

     

  • phpize failed error?

    2 months 2 weeks ago
    Install APCu (PHP 8.1, Plesk)

     

    install:

    # sudo apt install php-dev

  • phpize
    # sudo apt install…

    2 months 2 weeks ago
    pecl install apcu : phpize: not found / ERROR: `phpize' failed

    phpize

    # sudo apt install php-dev

     

    details

  • Problem:
    /opt/plesk/php/8.3…

    2 months 2 weeks ago
    Install APCu (PHP 8.1, Plesk)

    Problem:

  • Problem:PHP APCu caching…

    4 months ago
    Install APCu (PHP 8.1, Plesk)

    Problem: