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<title>[19675] trunk/wp-includes: Introduce sanitize_trackback_urls().</title>
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<dt>Revision</dt> <dd><a href="http://core.trac.wordpress.org/changeset/19675">19675</a></dd>
<dt>Author</dt> <dd>ryan</dd>
<dt>Date</dt> <dd>2012-01-04 19:45:13 +0000 (Wed, 04 Jan 2012)</dd>
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<h3>Log Message</h3>
<pre>Introduce sanitize_trackback_urls(). Don't ping bad urls. Don't ping bad urls or save them to the DB. Props xknown, SergeyBiryukov. fixes <a href="http://core.trac.wordpress.org/ticket/17560">#17560</a></pre>
<h3>Modified Paths</h3>
<ul>
<li><a href="#trunkwpincludesformattingphp">trunk/wp-includes/formatting.php</a></li>
<li><a href="#trunkwpincludespostphp">trunk/wp-includes/post.php</a></li>
</ul>
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<div id="patch">
<h3>Diff</h3>
<a id="trunkwpincludesformattingphp"></a>
<div class="modfile"><h4>Modified: trunk/wp-includes/formatting.php (19674 => 19675)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/wp-includes/formatting.php 2012-01-04 19:29:03 UTC (rev 19674)
+++ trunk/wp-includes/formatting.php 2012-01-04 19:45:13 UTC (rev 19675)
</span><span class="lines">@@ -3002,4 +3002,23 @@
</span><span class="cx"> return apply_filters( 'sanitize_mime_type', $sani_mime_type, $mime_type );
</span><span class="cx"> }
</span><span class="cx">
</span><ins>+/**
+ * Sanitize space or carriage return separated URLs that are used to send trackbacks.
+ *
+ * @since 3.4.0
+ *
+ * @param string $to_ping Space or carriage return separated URLs
+ * @return string URLs starting with the http or https protocol, separated by a carriage return.
+ */
+function sanitize_trackback_urls( $to_ping ) {
+ $urls_to_ping = preg_split( '/\r\n\t /', trim( $to_ping ), -1, PREG_SPLIT_NO_EMPTY );
+ foreach ( $urls_to_ping as $k => $url ) {
+ if ( !preg_match( '#^https?://.#i', $url ) )
+ unset( $urls_to_ping[$k] );
+ }
+ $urls_to_ping = array_map( 'esc_url_raw', $urls_to_ping );
+ $urls_to_ping = implode( "\n", $urls_to_ping );
+ return apply_filters( 'sanitize_trackback_urls', $urls_to_ping, $to_ping );
+}
+
</ins><span class="cx"> ?>
</span></span></pre></div>
<a id="trunkwpincludespostphp"></a>
<div class="modfile"><h4>Modified: trunk/wp-includes/post.php (19674 => 19675)</h4>
<pre class="diff"><span>
<span class="info">--- trunk/wp-includes/post.php 2012-01-04 19:29:03 UTC (rev 19674)
+++ trunk/wp-includes/post.php 2012-01-04 19:45:13 UTC (rev 19675)
</span><span class="lines">@@ -2537,7 +2537,7 @@
</span><span class="cx"> $ping_status = get_option('default_ping_status');
</span><span class="cx">
</span><span class="cx"> if ( isset($to_ping) )
</span><del>- $to_ping = preg_replace('|\s+|', "\n", $to_ping);
</del><ins>+ $to_ping = sanitize_trackback_urls( $to_ping );
</ins><span class="cx"> else
</span><span class="cx"> $to_ping = '';
</span><span class="cx">
</span><span class="lines">@@ -3064,7 +3064,7 @@
</span><span class="cx"> function get_to_ping($post_id) {
</span><span class="cx"> global $wpdb;
</span><span class="cx"> $to_ping = $wpdb->get_var( $wpdb->prepare( "SELECT to_ping FROM $wpdb->posts WHERE ID = %d", $post_id ));
</span><del>- $to_ping = trim($to_ping);
</del><ins>+ $to_ping = sanitize_trackback_urls( $to_ping );
</ins><span class="cx"> $to_ping = preg_split('/\s/', $to_ping, -1, PREG_SPLIT_NO_EMPTY);
</span><span class="cx"> $to_ping = apply_filters('get_to_ping', $to_ping);
</span><span class="cx"> return $to_ping;
</span></span></pre>
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