Vary - HTTP
Fleeting- Référence externe : https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Vary
The Vary HTTP response header describes the parts of the request message aside from the method and URL that influenced the content of the response it occurs in. Most often, this is used to create a cache key when content negotiation is in use
— https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Vary