The HTTPPreference-Applied header informs the client about which preferences from thePrefer request header were applied by the server.

The server indicates if a preference is applied to a response if it would otherwise be ambiguous for the client.

Syntax

Preference-Applied: <preference>

Examples

Server applies timezone preferences

The following request indicates that the client prefers events to be represented in a certain time zone:

GET /events HTTP/1.1Host: example.comPrefer: timezone=America/Los_Angeles

The server supports the preference and sends back the content with aPreference-Applied header:

HTTP/1.1 200 OKContent-Type: application/jsonPreference-Applied: timezone=America/Los_Angeles[  {"t":"2023-10-18T05:37:59.611-07:00"},  {"t":"2023-10-18T07:37:59.611-07:00"},  {"t":"2023-10-18T09:37:59.611-07:00"}]

Specifications

See also

• Prefer
• Prefer header on docs.oasis-open.org
• Prefer header on docs.postgrest.org