Feeds: Use latest comment date for the `Last-Modified` header of comments feed.

Previously, the `Last-Modified` header of comments feed was using the date/time of the last comment. This behavior was breaking caching and causing feed readers to believe there is no new content even when there might be new posts.

This commit changes this behavior to use the newest date from both `get_lastcommentmodified()` and `get_lastpostmodified()` functions instead of only using the result from `get_lastcommentmodified()`.

Props xiven, mauteri, costdev, audrasjb.
Fixes #47968.

Built from https://develop.svn.wordpress.org/trunk@53233


git-svn-id: http://core.svn.wordpress.org/trunk@52822 1a063a9b-81f0-0310-95a4-ce76da25c4cd
This commit is contained in:
audrasjb 2022-04-20 12:47:11 +00:00
parent 0cc2cb34cd
commit 943e956379
2 changed files with 12 additions and 5 deletions

View File

@ -413,6 +413,7 @@ class WP {
$headers = array();
$status = null;
$exit_required = false;
$date_format = 'D, d M Y H:i:s';
if ( is_user_logged_in() ) {
$headers = array_merge( $headers, wp_get_nocache_headers() );
@ -420,7 +421,7 @@ class WP {
// Unmoderated comments are only visible for 10 minutes via the moderation hash.
$expires = 10 * MINUTE_IN_SECONDS;
$headers['Expires'] = gmdate( 'D, d M Y H:i:s', time() + $expires );
$headers['Expires'] = gmdate( $date_format, time() + $expires );
$headers['Cache-Control'] = sprintf(
'max-age=%d, must-revalidate',
$expires
@ -459,13 +460,19 @@ class WP {
)
)
) {
$wp_last_modified = mysql2date( 'D, d M Y H:i:s', get_lastcommentmodified( 'GMT' ), false );
$wp_last_modified_post = mysql2date( $date_format, get_lastpostmodified( 'GMT' ), false );
$wp_last_modified_comment = mysql2date( $date_format, get_lastcommentmodified( 'GMT' ), false );
if ( strtotime( $wp_last_modified_post ) > strtotime( $wp_last_modified_comment ) ) {
$wp_last_modified = $wp_last_modified_post;
} else {
$wp_last_modified = $wp_last_modified_comment;
}
} else {
$wp_last_modified = mysql2date( 'D, d M Y H:i:s', get_lastpostmodified( 'GMT' ), false );
$wp_last_modified = mysql2date( $date_format, get_lastpostmodified( 'GMT' ), false );
}
if ( ! $wp_last_modified ) {
$wp_last_modified = gmdate( 'D, d M Y H:i:s' );
$wp_last_modified = gmdate( $date_format );
}
$wp_last_modified .= ' GMT';

View File

@ -16,7 +16,7 @@
*
* @global string $wp_version
*/
$wp_version = '6.0-beta2-53232';
$wp_version = '6.0-beta2-53233';
/**
* Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.