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<title>[44948] trunk: Feeds: ensure build/update date matches current query.</title>
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<dt style="float: left; width: 6em; font-weight: bold">Revision</dt> <dd><a style="font-weight: bold" href="https://core.trac.wordpress.org/changeset/44948">44948</a><script type="application/ld+json">{"@context":"http://schema.org","@type":"EmailMessage","description":"Review this Commit","action":{"@type":"ViewAction","url":"https://core.trac.wordpress.org/changeset/44948","name":"Review Commit"}}</script></dd>
<dt style="float: left; width: 6em; font-weight: bold">Author</dt> <dd>adamsilverstein</dd>
<dt style="float: left; width: 6em; font-weight: bold">Date</dt> <dd>2019-03-20 20:37:02 +0000 (Wed, 20 Mar 2019)</dd>
</dl>
<pre style='padding-left: 1em; margin: 2em 0; border-left: 2px solid #ccc; line-height: 1.25; font-size: 105%; font-family: sans-serif'>Feeds: ensure build/update date matches current query.
Displaying the correct build date in feeds is as important today as it was twelve years ago when this ticket was opened.
Fix an issue where all feeds in WordPress showed the same date for their last build date (the datapoint is `lastBuildDate`, `updated` or `dc:date` depending on the feed type).
Introduce a new `get_last_build_date` filter to adjust the date used for `lastBuildDate`. Developers who previously filtered `get_lastcommentmodified` to alter feed dates should use this filter instead.
* `get_last_build_date` extracts the latest post (or comment) in the current WP_Query object.
* In all feed templates, use `get_last_build_date` vs `get_lastpostmodified( 'GMT' );`.
Props stevenkword, spacedmonkey, ryanshoover, mauteri, nacin, jorbin, MikeNGarrett, Denis-de-Bernardy, peaceablewhale.
Fixes <a href="https://core.trac.wordpress.org/ticket/4575">#4575</a>.</pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#trunksrcwpincludesfeedatomcommentsphp">trunk/src/wp-includes/feed-atom-comments.php</a></li>
<li><a href="#trunksrcwpincludesfeedatomphp">trunk/src/wp-includes/feed-atom.php</a></li>
<li><a href="#trunksrcwpincludesfeedrdfphp">trunk/src/wp-includes/feed-rdf.php</a></li>
<li><a href="#trunksrcwpincludesfeedrssphp">trunk/src/wp-includes/feed-rss.php</a></li>
<li><a href="#trunksrcwpincludesfeedrss2commentsphp">trunk/src/wp-includes/feed-rss2-comments.php</a></li>
<li><a href="#trunksrcwpincludesfeedrss2php">trunk/src/wp-includes/feed-rss2.php</a></li>
<li><a href="#trunksrcwpincludesfeedphp">trunk/src/wp-includes/feed.php</a></li>
<li><a href="#trunktestsphpunittestsfeedrss2php">trunk/tests/phpunit/tests/feed/rss2.php</a></li>
</ul>
</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunksrcwpincludesfeedatomcommentsphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-includes/feed-atom-comments.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/feed-atom-comments.php 2019-03-20 20:06:22 UTC (rev 44947)
+++ trunk/src/wp-includes/feed-atom-comments.php 2019-03-20 20:37:02 UTC (rev 44948)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -45,7 +45,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">
</span><span class="cx" style="display: block; padding: 0 10px"> <updated>
</span><span class="cx" style="display: block; padding: 0 10px"> <?php
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- $date = get_lastcommentmodified( 'GMT' );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ $date = get_last_build_date();
</ins><span class="cx" style="display: block; padding: 0 10px"> echo $date ? mysql2date( 'Y-m-d\TH:i:s\Z', $date, false ) : date( 'Y-m-d\TH:i:s\Z' );
</span><span class="cx" style="display: block; padding: 0 10px"> ?>
</span><span class="cx" style="display: block; padding: 0 10px"> </updated>
</span></span></pre></div>
<a id="trunksrcwpincludesfeedatomphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-includes/feed-atom.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/feed-atom.php 2019-03-20 20:06:22 UTC (rev 44947)
+++ trunk/src/wp-includes/feed-atom.php 2019-03-20 20:37:02 UTC (rev 44948)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -32,7 +32,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">
</span><span class="cx" style="display: block; padding: 0 10px"> <updated>
</span><span class="cx" style="display: block; padding: 0 10px"> <?php
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- $date = get_lastpostmodified( 'GMT' );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ $date = get_last_build_date();
</ins><span class="cx" style="display: block; padding: 0 10px"> echo $date ? mysql2date( 'Y-m-d\TH:i:s\Z', $date, false ) : date( 'Y-m-d\TH:i:s\Z' );
</span><span class="cx" style="display: block; padding: 0 10px"> ?>
</span><span class="cx" style="display: block; padding: 0 10px"> </updated>
</span></span></pre></div>
<a id="trunksrcwpincludesfeedrdfphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-includes/feed-rdf.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/feed-rdf.php 2019-03-20 20:06:22 UTC (rev 44947)
+++ trunk/src/wp-includes/feed-rdf.php 2019-03-20 20:37:02 UTC (rev 44948)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -35,7 +35,7 @@
</span><span class="cx" style="display: block; padding: 0 10px"> <description><?php bloginfo_rss( 'description' ); ?></description>
</span><span class="cx" style="display: block; padding: 0 10px"> <dc:date>
</span><span class="cx" style="display: block; padding: 0 10px"> <?php
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- $date = get_lastpostmodified( 'GMT' );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ $date = get_last_build_date();
</ins><span class="cx" style="display: block; padding: 0 10px"> echo $date ? mysql2date( 'Y-m-d\TH:i:s\Z', $date ) : date( 'Y-m-d\TH:i:s\Z' );
</span><span class="cx" style="display: block; padding: 0 10px"> ?>
</span><span class="cx" style="display: block; padding: 0 10px"> </dc:date>
</span></span></pre></div>
<a id="trunksrcwpincludesfeedrssphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-includes/feed-rss.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/feed-rss.php 2019-03-20 20:06:22 UTC (rev 44947)
+++ trunk/src/wp-includes/feed-rss.php 2019-03-20 20:37:02 UTC (rev 44948)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -16,7 +16,7 @@
</span><span class="cx" style="display: block; padding: 0 10px"> <description><?php bloginfo_rss( 'description' ); ?></description>
</span><span class="cx" style="display: block; padding: 0 10px"> <lastBuildDate>
</span><span class="cx" style="display: block; padding: 0 10px"> <?php
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- $date = get_lastpostmodified( 'GMT' );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ $date = get_last_build_date();
</ins><span class="cx" style="display: block; padding: 0 10px"> echo $date ? mysql2date( 'D, d M Y H:i:s +0000', $date ) : date( 'D, d M Y H:i:s +0000' );
</span><span class="cx" style="display: block; padding: 0 10px"> ?>
</span><span class="cx" style="display: block; padding: 0 10px"> </lastBuildDate>
</span></span></pre></div>
<a id="trunksrcwpincludesfeedrss2commentsphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-includes/feed-rss2-comments.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/feed-rss2-comments.php 2019-03-20 20:06:22 UTC (rev 44947)
+++ trunk/src/wp-includes/feed-rss2-comments.php 2019-03-20 20:37:02 UTC (rev 44948)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -51,7 +51,7 @@
</span><span class="cx" style="display: block; padding: 0 10px"> <description><?php bloginfo_rss( 'description' ); ?></description>
</span><span class="cx" style="display: block; padding: 0 10px"> <lastBuildDate>
</span><span class="cx" style="display: block; padding: 0 10px"> <?php
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- $date = get_lastcommentmodified( 'GMT' );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ $date = get_last_build_date();
</ins><span class="cx" style="display: block; padding: 0 10px"> echo $date ? mysql2date( 'r', $date, false ) : date( 'r' );
</span><span class="cx" style="display: block; padding: 0 10px"> ?>
</span><span class="cx" style="display: block; padding: 0 10px"> </lastBuildDate>
</span></span></pre></div>
<a id="trunksrcwpincludesfeedrss2php"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-includes/feed-rss2.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/feed-rss2.php 2019-03-20 20:06:22 UTC (rev 44947)
+++ trunk/src/wp-includes/feed-rss2.php 2019-03-20 20:37:02 UTC (rev 44948)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -44,7 +44,7 @@
</span><span class="cx" style="display: block; padding: 0 10px"> <description><?php bloginfo_rss( 'description' ); ?></description>
</span><span class="cx" style="display: block; padding: 0 10px"> <lastBuildDate>
</span><span class="cx" style="display: block; padding: 0 10px"> <?php
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- $date = get_lastpostmodified( 'GMT' );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ $date = get_last_build_date();
</ins><span class="cx" style="display: block; padding: 0 10px"> echo $date ? mysql2date( 'r', $date, false ) : date( 'r' );
</span><span class="cx" style="display: block; padding: 0 10px"> ?>
</span><span class="cx" style="display: block; padding: 0 10px"> </lastBuildDate>
</span></span></pre></div>
<a id="trunksrcwpincludesfeedphp"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/src/wp-includes/feed.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/feed.php 2019-03-20 20:06:22 UTC (rev 44947)
+++ trunk/src/wp-includes/feed.php 2019-03-20 20:37:02 UTC (rev 44948)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -637,6 +637,51 @@
</span><span class="cx" style="display: block; padding: 0 10px"> echo esc_url( apply_filters( 'self_link', set_url_scheme( 'http://' . $host['host'] . wp_unslash( $_SERVER['REQUEST_URI'] ) ) ) );
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><span class="cx" style="display: block; padding: 0 10px">
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+/*
+* Get the timestamp of the most recently modified post from WP_Query.
+*
+* If viewing a comment feed, the date of the most recently modified
+* comment will be returned.
+*
+* @global WP_Query $wp_query The global WP_Query object.
+*
+* @since 5.2.0
+*
+* @return string The timestamp.
+*/
+function get_last_build_date() {
+ global $wp_query;
+
+ if ( empty( $wp_query ) || ! $wp_query->have_posts() ) {
+ // Fallback to last time any post was modified or published.
+ return get_lastpostmodified( 'GMT' );
+ }
+
+ // Extract the post modified times from the posts.
+ $modified_times = wp_list_pluck( $wp_query->posts, 'post_modified_gmt' );
+
+ // If this is a comment feed, check those objects too.
+ if ( $wp_query->is_comment_feed() && $wp_query->comment_count ) {
+ // Extract the comment modified times from the comments.
+ $comment_times = wp_list_pluck( $wp_query->comments, 'comment_date_gmt' );
+
+ // Add the comment times to the post times for comparison.
+ $modified_times = array_merge( $modified_times, $comment_times );
+ }
+
+ // Determine the maximum modified time.
+ $max_modified_time = max( $modified_times );
+
+ /**
+ * Filters the date the last post or comment in the query was modified.
+ *
+ * @since 5.2.0
+ *
+ * @param string $max_modified_times Date the last post or comment was modified in the query.
+ */
+ return apply_filters( 'get_last_build_date', $max_modified_time );
+}
+
</ins><span class="cx" style="display: block; padding: 0 10px"> /**
</span><span class="cx" style="display: block; padding: 0 10px"> * Return the content type for specified feed type.
</span><span class="cx" style="display: block; padding: 0 10px"> *
</span></span></pre></div>
<a id="trunktestsphpunittestsfeedrss2php"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/tests/phpunit/tests/feed/rss2.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/tests/phpunit/tests/feed/rss2.php 2019-03-20 20:06:22 UTC (rev 44947)
+++ trunk/tests/phpunit/tests/feed/rss2.php 2019-03-20 20:37:02 UTC (rev 44948)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -36,20 +36,23 @@
</span><span class="cx" style="display: block; padding: 0 10px"> );
</span><span class="cx" style="display: block; padding: 0 10px">
</span><span class="cx" style="display: block; padding: 0 10px"> // Set a predictable time for testing date archives.
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- self::$post_date = '2003-05-27 10:07:53';
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ self::$post_date = strtotime( '2003-05-27 10:07:53' );
</ins><span class="cx" style="display: block; padding: 0 10px">
</span><span class="cx" style="display: block; padding: 0 10px"> $count = get_option( 'posts_per_rss' ) + 1;
</span><span class="cx" style="display: block; padding: 0 10px">
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ self::$posts = array();
</ins><span class="cx" style="display: block; padding: 0 10px"> // Create a few posts
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">- self::$posts = $factory->post->create_many(
- $count,
- array(
- 'post_author' => self::$user_id,
- 'post_date' => self::$post_date,
- 'post_content' => 'Lorem ipsum dolor sit amet, consectetur adipiscing elit. Donec velit massa, ultrices eu est suscipit, mattis posuere est. Donec vitae purus lacus. Cras vitae odio odio.',
- 'post_excerpt' => 'Lorem ipsum dolor sit amet, consectetur adipiscing elit.',
- )
- );
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ for ( $i = 1; $i <= $count; $i++ ) {
+ self::$posts[] = $factory->post->create(
+ array(
+ 'post_author' => self::$user_id,
+ // Separate post dates 5 seconds apart.
+ 'post_date' => gmdate( 'Y-m-d H:i:s', self::$post_date + ( 5 * $i ) ),
+ 'post_content' => 'Lorem ipsum dolor sit amet, consectetur adipiscing elit. Donec velit massa, ultrices eu est suscipit, mattis posuere est. Donec vitae purus lacus. Cras vitae odio odio.',
+ 'post_excerpt' => 'Lorem ipsum dolor sit amet, consectetur adipiscing elit.',
+ )
+ );
+ }
</ins><span class="cx" style="display: block; padding: 0 10px">
</span><span class="cx" style="display: block; padding: 0 10px"> // Assign a category to those posts
</span><span class="cx" style="display: block; padding: 0 10px"> foreach ( self::$posts as $post ) {
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -396,6 +399,7 @@
</span><span class="cx" style="display: block; padding: 0 10px"> // Queries performed on valid feed endpoints should contain posts.
</span><span class="cx" style="display: block; padding: 0 10px"> $this->assertTrue( have_posts() );
</span><span class="cx" style="display: block; padding: 0 10px">
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+
</ins><span class="cx" style="display: block; padding: 0 10px"> // Check to see if we have the expected XML output from the feed template.
</span><span class="cx" style="display: block; padding: 0 10px"> $feed = $this->do_rss2();
</span><span class="cx" style="display: block; padding: 0 10px">
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -463,4 +467,31 @@
</span><span class="cx" style="display: block; padding: 0 10px"> // There should only be one <rss> child element.
</span><span class="cx" style="display: block; padding: 0 10px"> $this->assertEquals( 1, count( $rss ) );
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+
+ /**
+ * Test <rss> element has correct last build date.
+ *
+ * @ticket 4575
+ *
+ * @dataProvider data_test_get_last_build_date
+ */
+ public function test_get_last_build_date( $url, $element ) {
+ $this->go_to( $url );
+ $feed = $this->do_rss2();
+ $xml = xml_to_array( $feed );
+
+ // Get the <rss> child element of <xml>.
+ $rss = xml_find( $xml, $element );
+ $last_build_date = $rss[0]['child'][0]['child'][4]['content'];
+ $this->assertEquals( strtotime( get_last_build_date() ), strtotime( $last_build_date ) );
+ }
+
+
+ public function data_test_get_last_build_date() {
+ return array(
+ array( '/?feed=rss2', 'rss' ),
+ array( '/?feed=commentsrss2', 'rss' ),
+ );
+
+ }
</ins><span class="cx" style="display: block; padding: 0 10px"> }
</span></span></pre>
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