[wp-trac] [WordPress Trac] #40444: REST API responses are sent with an empty Last-Modified header.

[WordPress Trac]

#40444: REST API responses are sent with an empty Last-Modified header.
-------------------------------------------------+-------------------------
 Reporter:  zinigor                              |       Owner:  jnylen0
     Type:  defect (bug)                         |      Status:  closed
 Priority:  normal                               |   Milestone:  4.8
Component:  REST API                             |     Version:  4.4
 Severity:  normal                               |  Resolution:  fixed
 Keywords:  has-patch has-unit-tests needs-      |     Focuses:  rest-api
  testing                                        |
-------------------------------------------------+-------------------------
Changes (by jnylen0):

 * status:  assigned => closed
 * resolution:   => fixed


Comment:

 In [changeset:"40805"]:
 {{{
 #!CommitTicketReference repository="" revision="40805"
 REST API: Avoid sending blank `Last-Modified` headers with authenticated
 requests.

 This commit adds a new `WP_REST_Server#remove_header` method and uses it
 to clear the `Last-Modified` header when the "no caching" headers are sent
 (by default for all authenticated REST API requests).  This matches the
 behavior of the `nocache_headers` function used in other parts of
 WordPress.

 Previously, the REST API would send an empty `Last-Modified` header in
 this situation.  Under some server and browser configurations, this causes
 browsers to cache authenticated REST API requests, which is undesirable.

 Props iv3rson76, zinigor, rmccue, jnylen0.
 Fixes #40444.
 }}}

--
Ticket URL: <https://core.trac.wordpress.org/ticket/40444#comment:11>
WordPress Trac <https://core.trac.wordpress.org/>
WordPress publishing platform