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<title>[37708] trunk: Embeds: Improve performance when embedding a post from the current site.</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/37708">37708</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/37708","name":"Review Commit"}}</script></dd>
<dt style="float: left; width: 6em; font-weight: bold">Author</dt> <dd>swissspidy</dd>
<dt style="float: left; width: 6em; font-weight: bold">Date</dt> <dd>2016-06-15 11:22:52 +0000 (Wed, 15 Jun 2016)</dd>
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<pre style='padding-left: 1em; margin: 2em 0; border-left: 2px solid #ccc; line-height: 1.25; font-size: 105%; font-family: sans-serif'>Embeds: Improve performance when embedding a post from the current site.

When the post being embedded is from the same site, there's no reason to do an HTTP request for it. The data can be fetched directly using `get_oembed_response_data()`.

Fixes <a href="https://core.trac.wordpress.org/ticket/36767">#36767</a> for trunk.</pre>

<h3>Modified Paths</h3>
<ul>
<li><a href="#trunksrcwpincludesclassoembedphp">trunk/src/wp-includes/class-oembed.php</a></li>
<li><a href="#trunksrcwpincludesdefaultfiltersphp">trunk/src/wp-includes/default-filters.php</a></li>
<li><a href="#trunksrcwpincludesembedphp">trunk/src/wp-includes/embed.php</a></li>
</ul>

<h3>Added Paths</h3>
<ul>
<li><a href="#trunktestsphpunittestsoembedwpOembedphp">trunk/tests/phpunit/tests/oembed/wpOembed.php</a></li>
</ul>

</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunksrcwpincludesclassoembedphp"></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/class-oembed.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/class-oembed.php    2016-06-14 23:11:33 UTC (rev 37707)
+++ trunk/src/wp-includes/class-oembed.php      2016-06-15 11:22:52 UTC (rev 37708)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -315,10 +315,32 @@
</span><span class="cx" style="display: block; padding: 0 10px">         * @return false|string False on failure, otherwise the UNSANITIZED (and potentially unsafe) HTML that should be used to embed.
</span><span class="cx" style="display: block; padding: 0 10px">         */
</span><span class="cx" style="display: block; padding: 0 10px">        public function get_html( $url, $args = '' ) {
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                /**
+                * Filters the oEmbed result before any HTTP requests are made.
+                *
+                * This allows one to short-circuit the default logic, perhaps by
+                * replacing it with a routine that is more optimal for your setup.
+                *
+                * Passing a non-null value to the filter will effectively short-circuit retrieval,
+                * returning the passed value instead.
+                *
+                * @since 4.5.3
+                *
+                * @param null|string $result The UNSANITIZED (and potentially unsafe) HTML that should be used to embed. Default null.
+                * @param string      $url    The URL to the content that should be attempted to be embedded.
+                * @param array       $args   Optional. Arguments, usually passed from a shortcode. Default empty.
+                */
+               $pre = apply_filters( 'pre_oembed_result', null, $url, $args );
+
+               if ( null !== $pre ) {
+                       return $pre;
+               }
+
</ins><span class="cx" style="display: block; padding: 0 10px">                 $provider = $this->get_provider( $url, $args );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-                if ( !$provider || false === $data = $this->fetch( $provider, $url, $args ) )
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+         if ( ! $provider || false === $data = $this->fetch( $provider, $url, $args ) ) {
</ins><span class="cx" style="display: block; padding: 0 10px">                         return false;
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                }
</ins><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">                 * Filters the HTML returned by the oEmbed provider.
</span></span></pre></div>
<a id="trunksrcwpincludesdefaultfiltersphp"></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/default-filters.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/default-filters.php 2016-06-14 23:11:33 UTC (rev 37707)
+++ trunk/src/wp-includes/default-filters.php   2016-06-15 11:22:52 UTC (rev 37708)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -476,5 +476,6 @@
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px"> add_filter( 'oembed_dataparse',       'wp_filter_oembed_result',        10, 3 );
</span><span class="cx" style="display: block; padding: 0 10px"> add_filter( 'oembed_response_data',   'get_oembed_response_data_rich',  10, 4 );
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+add_filter( 'pre_oembed_result',      'wp_filter_pre_oembed_result',    10, 3 );
</ins><span class="cx" style="display: block; padding: 0 10px"> 
</span><span class="cx" style="display: block; padding: 0 10px"> unset( $filter, $action );
</span></span></pre></div>
<a id="trunksrcwpincludesembedphp"></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/embed.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/src/wp-includes/embed.php   2016-06-14 23:11:33 UTC (rev 37707)
+++ trunk/src/wp-includes/embed.php     2016-06-15 11:22:52 UTC (rev 37708)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1079,3 +1079,35 @@
</span><span class="cx" style="display: block; padding: 0 10px">         */
</span><span class="cx" style="display: block; padding: 0 10px">        echo apply_filters( 'embed_site_title_html', $site_title );
</span><span class="cx" style="display: block; padding: 0 10px"> }
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+
+/**
+ * Filters the oEmbed result before any HTTP requests are made.
+ *
+ * If the URL belongs to the current site, the result is fetched directly instead of
+ * going through the oEmbed discovery process.
+ *
+ * @since 4.5.3
+ *
+ * @param null|string $result The UNSANITIZED (and potentially unsafe) HTML that should be used to embed. Default null.
+ * @param string      $url    The URL that should be inspected for discovery `<link>` tags.
+ * @param array       $args   oEmbed remote get arguments.
+ * @return null|string The UNSANITIZED (and potentially unsafe) HTML that should be used to embed.
+ *                     Null if the URL does not belong to the current site.
+ */
+function wp_filter_pre_oembed_result( $result, $url, $args ) {
+       $post_id = url_to_postid( $url );
+
+       /** This filter is documented in wp-includes/class-wp-oembed-controller.php */
+       $post_id = apply_filters( 'oembed_request_post_id', $post_id, $url );
+
+       $width = isset( $args['width'] ) ? $args['width'] : 0;
+
+       $data = get_oembed_response_data( $post_id, $width );
+       $data = _wp_oembed_get_object()->data2html( (object) $data, $url );
+
+       if ( ! $data ) {
+               return $result;
+       }
+
+       return $data;
+}
</ins></span></pre></div>
<a id="trunktestsphpunittestsoembedwpOembedphp"></a>
<div class="addfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Added: trunk/tests/phpunit/tests/oembed/wpOembed.php</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/tests/phpunit/tests/oembed/wpOembed.php                             (rev 0)
+++ trunk/tests/phpunit/tests/oembed/wpOembed.php       2016-06-15 11:22:52 UTC (rev 37708)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -0,0 +1,56 @@
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+<?php
+
+/**
+ * @group oembed
+ */
+class Tests_WP_oEmbed extends WP_UnitTestCase {
+       /**
+        * @var WP_oEmbed
+        */
+       protected $oembed;
+
+       public $pre_oembed_result_filtered = false;
+
+       public function setUp() {
+               parent::setUp();
+
+               require_once ABSPATH . WPINC . '/class-oembed.php';
+               $this->oembed = _wp_oembed_get_object();
+
+               $this->pre_oembed_result_filtered = false;
+       }
+
+       public function _filter_pre_oembed_result( $result ) {
+               // If this is not null, the oEmbed result has been filtered before any HTTP requests were made.
+               $this->pre_oembed_result_filtered = $result;
+
+               return $result;
+       }
+
+       public function test_wp_filter_pre_oembed_result_prevents_http_request_for_internal_permalinks() {
+               $post_id   = self::factory()->post->create();
+               $permalink = get_permalink( $post_id );
+
+               add_filter( 'pre_oembed_result', array( $this, '_filter_pre_oembed_result' ) );
+               $actual = $this->oembed->get_html( $permalink );
+               remove_filter( 'pre_oembed_result', array( $this, '_filter_pre_oembed_result' ) );
+
+               $this->assertNotFalse( $this->pre_oembed_result_filtered );
+               $this->assertEquals( $this->pre_oembed_result_filtered, $actual );
+       }
+
+       public function test_wp_filter_pre_oembed_result_prevents_http_request_when_viewing_the_post() {
+               $post_id   = self::factory()->post->create();
+               $permalink = get_permalink( $post_id );
+
+               $this->go_to( $permalink );
+               $this->assertQueryTrue( 'is_single', 'is_singular' );
+
+               add_filter( 'pre_oembed_result', array( $this, '_filter_pre_oembed_result' ) );
+               $actual = $this->oembed->get_html( $permalink );
+               remove_filter( 'pre_oembed_result', array( $this, '_filter_pre_oembed_result' ) );
+
+               $this->assertNotFalse( $this->pre_oembed_result_filtered );
+               $this->assertEquals( $this->pre_oembed_result_filtered, $actual );
+       }
+}
</ins><span class="cx" style="display: block; padding: 0 10px">Property changes on: trunk/tests/phpunit/tests/oembed/wpOembed.php
</span><span class="cx" style="display: block; padding: 0 10px">___________________________________________________________________
</span></span></pre></div>
<a id="svneolstyle"></a>
<div class="addfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Added: svn:eol-style</h4></div>
<ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+native
</ins><span class="cx" style="display: block; padding: 0 10px">\ No newline at end of property
</span></div>

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