.. highlight:: python :linenothreshold: 5 General APIs ============ This page lists some general signals and hooks which do not belong to a specific type of plugin but might come in handy for various plugins. HTML head injection ------------------- These two signals allow you to put code inside the HTML ```` tag of every page. One signal is for the frontend, one for the backend. You will get the request as a keyword argument ``request`` and can return plain HTML. * ``pretix.presale.signals.html_head`` * ``pretix.control.signals.html_head``