Adding upstream version 6.4.3+dfsg1.upstream/6.4.3+dfsg1

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 171 insertions, 0 deletions

diff --git a/wp-trackback.php b/wp-trackback.php
new file mode 100644
index 0000000..670d9c4
--- /dev/null
+++ b/wp-trackback.php
@@ -0,0 +1,171 @@
+<?php
+/**
+ * Handle Trackbacks and Pingbacks Sent to WordPress
+ *
+ * @since 0.71
+ *
+ * @package WordPress
+ * @subpackage Trackbacks
+ */
+
+if ( empty( $wp ) ) {
+	require_once __DIR__ . '/wp-load.php';
+	wp( array( 'tb' => '1' ) );
+}
+
+// Always run as an unauthenticated user.
+wp_set_current_user( 0 );
+
+/**
+ * Response to a trackback.
+ *
+ * Responds with an error or success XML message.
+ *
+ * @since 0.71
+ *
+ * @param int|bool $error         Whether there was an error.
+ *                                Default '0'. Accepts '0' or '1', true or false.
+ * @param string   $error_message Error message if an error occurred. Default empty string.
+ */
+function trackback_response( $error = 0, $error_message = '' ) {
+	header( 'Content-Type: text/xml; charset=' . get_option( 'blog_charset' ) );
+
+	if ( $error ) {
+		echo '<?xml version="1.0" encoding="utf-8"?' . ">\n";
+		echo "<response>\n";
+		echo "<error>1</error>\n";
+		echo "<message>$error_message</message>\n";
+		echo '</response>';
+		die();
+	} else {
+		echo '<?xml version="1.0" encoding="utf-8"?' . ">\n";
+		echo "<response>\n";
+		echo "<error>0</error>\n";
+		echo '</response>';
+	}
+}
+
+if ( ! isset( $_GET['tb_id'] ) || ! $_GET['tb_id'] ) {
+	$post_id = explode( '/', $_SERVER['REQUEST_URI'] );
+	$post_id = (int) $post_id[ count( $post_id ) - 1 ];
+}
+
+$trackback_url = isset( $_POST['url'] ) ? $_POST['url'] : '';
+$charset       = isset( $_POST['charset'] ) ? $_POST['charset'] : '';
+
+// These three are stripslashed here so they can be properly escaped after mb_convert_encoding().
+$title     = isset( $_POST['title'] ) ? wp_unslash( $_POST['title'] ) : '';
+$excerpt   = isset( $_POST['excerpt'] ) ? wp_unslash( $_POST['excerpt'] ) : '';
+$blog_name = isset( $_POST['blog_name'] ) ? wp_unslash( $_POST['blog_name'] ) : '';
+
+if ( $charset ) {
+	$charset = str_replace( array( ',', ' ' ), '', strtoupper( trim( $charset ) ) );
+} else {
+	$charset = 'ASCII, UTF-8, ISO-8859-1, JIS, EUC-JP, SJIS';
+}
+
+// No valid uses for UTF-7.
+if ( str_contains( $charset, 'UTF-7' ) ) {
+	die;
+}
+
+// For international trackbacks.
+if ( function_exists( 'mb_convert_encoding' ) ) {
+	$title     = mb_convert_encoding( $title, get_option( 'blog_charset' ), $charset );
+	$excerpt   = mb_convert_encoding( $excerpt, get_option( 'blog_charset' ), $charset );
+	$blog_name = mb_convert_encoding( $blog_name, get_option( 'blog_charset' ), $charset );
+}
+
+// Escape values to use in the trackback.
+$title     = wp_slash( $title );
+$excerpt   = wp_slash( $excerpt );
+$blog_name = wp_slash( $blog_name );
+
+if ( is_single() || is_page() ) {
+	$post_id = $posts[0]->ID;
+}
+
+if ( ! isset( $post_id ) || ! (int) $post_id ) {
+	trackback_response( 1, __( 'I really need an ID for this to work.' ) );
+}
+
+if ( empty( $title ) && empty( $trackback_url ) && empty( $blog_name ) ) {
+	// If it doesn't look like a trackback at all.
+	wp_redirect( get_permalink( $post_id ) );
+	exit;
+}
+
+if ( ! empty( $trackback_url ) && ! empty( $title ) ) {
+	/**
+	 * Fires before the trackback is added to a post.
+	 *
+	 * @since 4.7.0
+	 *
+	 * @param int    $post_id       Post ID related to the trackback.
+	 * @param string $trackback_url Trackback URL.
+	 * @param string $charset       Character set.
+	 * @param string $title         Trackback title.
+	 * @param string $excerpt       Trackback excerpt.
+	 * @param string $blog_name     Site name.
+	 */
+	do_action( 'pre_trackback_post', $post_id, $trackback_url, $charset, $title, $excerpt, $blog_name );
+
+	header( 'Content-Type: text/xml; charset=' . get_option( 'blog_charset' ) );
+
+	if ( ! pings_open( $post_id ) ) {
+		trackback_response( 1, __( 'Sorry, trackbacks are closed for this item.' ) );
+	}
+
+	$title   = wp_html_excerpt( $title, 250, '&#8230;' );
+	$excerpt = wp_html_excerpt( $excerpt, 252, '&#8230;' );
+
+	$comment_post_id      = (int) $post_id;
+	$comment_author       = $blog_name;
+	$comment_author_email = '';
+	$comment_author_url   = $trackback_url;
+	$comment_content      = "<strong>$title</strong>\n\n$excerpt";
+	$comment_type         = 'trackback';
+
+	$dupe = $wpdb->get_results(
+		$wpdb->prepare(
+			"SELECT * FROM $wpdb->comments WHERE comment_post_ID = %d AND comment_author_url = %s",
+			$comment_post_id,
+			$comment_author_url
+		)
+	);
+
+	if ( $dupe ) {
+		trackback_response( 1, __( 'There is already a ping from that URL for this post.' ) );
+	}
+
+	$commentdata = array(
+		'comment_post_ID' => $comment_post_id,
+	);
+
+	$commentdata += compact(
+		'comment_author',
+		'comment_author_email',
+		'comment_author_url',
+		'comment_content',
+		'comment_type'
+	);
+
+	$result = wp_new_comment( $commentdata );
+
+	if ( is_wp_error( $result ) ) {
+		trackback_response( 1, $result->get_error_message() );
+	}
+
+	$trackback_id = $wpdb->insert_id;
+
+	/**
+	 * Fires after a trackback is added to a post.
+	 *
+	 * @since 1.2.0
+	 *
+	 * @param int $trackback_id Trackback ID.
+	 */
+	do_action( 'trackback_post', $trackback_id );
+
+	trackback_response( 0 );
+}