takahe/templates/_opengraph.html

{% load opengraph %}
{% with opengraph_merged=opengraph_local|dict_merge:opengraph_defaults %}
    <!-- Begin OpenGraph tagging -->
    {% for key, value in opengraph_merged.items %}
        <meta content="{{ value|striptags }}" property="{{ key }}"/>
        {% if key == "og:description" %}
            {# Mastodon duplicates this one tag without the og: prefix. Not sure why #}
            <meta content="{{ value|striptags }}" property="description"/>
        {% endif %}
    {% endfor %}
    {% block opengraph_extra %}
    {% endblock %}
    <!-- End OpenGraph tagging -->
{% endwith %}