Ticket #47398: 47398.4.diff

src/wp-includes/canonical.php

@@ -19 +19 @@
  *
  * Prevents redirection for feeds, trackbacks, searches, and
  * admin URLs. Does not redirect on non-pretty-permalink-supporting IIS 7+,
- * page/post previews, WP admin, Trackbacks, robots.txt, searches, or on POST
- * requests.
+ * page/post previews, WP admin, Trackbacks, robots.txt, favicon.ico, searches,
+ * or on POST requests.
  *
  * Will also attempt to find the correct link when a user enters a URL that does
  * not exist based on exact WordPress query. Will instead try to parse the URL
@@ -56 +56 @@
                 }
         }
 
-        if ( is_trackback() || is_search() || is_admin() || is_preview() || is_robots() || ( $is_IIS && ! iis7_supports_permalinks() ) ) {
+        if ( is_trackback() || is_search() || is_admin() || is_preview() || is_robots() || is_favicon() || ( $is_IIS && ! iis7_supports_permalinks() ) ) {
                 return;
         }
 

src/wp-includes/class-wp-query.php

@@ -391 +391 @@
         public $is_robots = false;
 
         /**
+         * Signifies whether the current query is for the favicon.ico file.
+         *
+         * @since 5.4.0
+         * @var bool
+         */
+        public $is_favicon = false;
+
+        /**
          * Signifies whether the current query is for the page_for_posts page.
          *
          * Basically, the homepage if the option isn't set for the static homepage.
@@ -478 +486 @@
                 $this->is_attachment        = false;
                 $this->is_singular          = false;
                 $this->is_robots            = false;
+                $this->is_favicon           = false;
                 $this->is_posts_page        = false;
                 $this->is_post_type_archive = false;
         }
@@ -744 +753 @@
 
                 if ( ! empty( $qv['robots'] ) ) {
                         $this->is_robots = true;
+                } elseif ( ! empty( $qv['favicon'] ) ) {
+                        $this->is_favicon = true;
                 }
 
                 if ( ! is_scalar( $qv['p'] ) || $qv['p'] < 0 ) {
@@ -957 +968 @@
                         $this->is_comment_feed = true;
                 }
 
-                if ( ! ( $this->is_singular || $this->is_archive || $this->is_search || $this->is_feed || ( defined( 'REST_REQUEST' ) && REST_REQUEST ) || $this->is_trackback || $this->is_404 || $this->is_admin || $this->is_robots ) ) {
+                if ( ! ( $this->is_singular || $this->is_archive || $this->is_search || $this->is_feed
+                                || ( defined( 'REST_REQUEST' ) && REST_REQUEST )
+                                || $this->is_trackback || $this->is_404 || $this->is_admin || $this->is_robots || $this->is_favicon ) ) {
                         $this->is_home = true;
                 }
 
@@ -4007 +4020 @@
         }
 
         /**
-         * Is the query for the robots file?
+         * Is the query for the robots.txt file?
          *
          * @since 3.1.0
          *
@@ -4018 +4031 @@
         }
 
         /**
+         * Is the query for the favicon.ico file?
+         *
+         * @since 5.4.0
+         *
+         * @return bool
+         */
+        public function is_favicon() {
+                return (bool) $this->is_favicon;
+        }
+
+        /**
          * Is the query for a search?
          *
          * @since 3.1.0

src/wp-includes/class-wp-rewrite.php

@@ -1259 +1259 @@
                         return $rewrite;
                 }
 
-                // robots.txt -only if installed at the root
+                // robots.txt -- only if installed at the root
                 $home_path      = parse_url( home_url() );
                 $robots_rewrite = ( empty( $home_path['path'] ) || '/' == $home_path['path'] ) ? array( 'robots\.txt$' => $this->index . '?robots=1' ) : array();
 
+                // favicon.ico -- only if installed at the root
+                $favicon_rewrite = ( empty( $home_path['path'] ) || '/' == $home_path['path'] ) ? array( 'favicon\.ico$' => $this->index . '?favicon=1' ) : array();
+
                 // Old feed and service files.
                 $deprecated_files = array(
                         '.*wp-(atom|rdf|rss|rss2|feed|commentsrss2)\.php$' => $this->index . '?feed=old',
@@ -1419 +1422 @@
 
                 // Put them together.
                 if ( $this->use_verbose_page_rules ) {
-                        $this->rules = array_merge( $this->extra_rules_top, $robots_rewrite, $deprecated_files, $registration_pages, $root_rewrite, $comments_rewrite, $search_rewrite, $author_rewrite, $date_rewrite, $page_rewrite, $post_rewrite, $this->extra_rules );
+                        $this->rules = array_merge( $this->extra_rules_top, $robots_rewrite, $favicon_rewrite, $deprecated_files, $registration_pages, $root_rewrite, $comments_rewrite, $search_rewrite, $author_rewrite, $date_rewrite, $page_rewrite, $post_rewrite, $this->extra_rules );
                 } else {
-                        $this->rules = array_merge( $this->extra_rules_top, $robots_rewrite, $deprecated_files, $registration_pages, $root_rewrite, $comments_rewrite, $search_rewrite, $author_rewrite, $date_rewrite, $post_rewrite, $page_rewrite, $this->extra_rules );
+                        $this->rules = array_merge( $this->extra_rules_top, $robots_rewrite, $favicon_rewrite, $deprecated_files, $registration_pages, $root_rewrite, $comments_rewrite, $search_rewrite, $author_rewrite, $date_rewrite, $post_rewrite, $page_rewrite, $this->extra_rules );
                 }
 
                 /**

src/wp-includes/class-wp.php

@@ -14 +14 @@
          * @since 2.0.0
          * @var string[]
          */
-        public $public_query_vars = array( 'm', 'p', 'posts', 'w', 'cat', 'withcomments', 'withoutcomments', 's', 'search', 'exact', 'sentence', 'calendar', 'page', 'paged', 'more', 'tb', 'pb', 'author', 'order', 'orderby', 'year', 'monthnum', 'day', 'hour', 'minute', 'second', 'name', 'category_name', 'tag', 'feed', 'author_name', 'pagename', 'page_id', 'error', 'attachment', 'attachment_id', 'subpost', 'subpost_id', 'preview', 'robots', 'taxonomy', 'term', 'cpage', 'post_type', 'embed' );
+        public $public_query_vars = array( 'm', 'p', 'posts', 'w', 'cat', 'withcomments', 'withoutcomments', 's', 'search', 'exact', 'sentence', 'calendar', 'page', 'paged', 'more', 'tb', 'pb', 'author', 'order', 'orderby', 'year', 'monthnum', 'day', 'hour', 'minute', 'second', 'name', 'category_name', 'tag', 'feed', 'author_name', 'pagename', 'page_id', 'error', 'attachment', 'attachment_id', 'subpost', 'subpost_id', 'preview', 'robots', 'favicon', 'taxonomy', 'term', 'cpage', 'post_type', 'embed' );
 
         /**
          * Private query variables.
@@ -659 +659 @@
                         return;
                 }
 
-                // Never 404 for the admin, robots, or if we found posts.
-                if ( is_admin() || is_robots() || $wp_query->posts ) {
+                // Never 404 for the admin, robots, favicon, or if we found posts.
+                if ( is_admin() || is_robots() || is_favicon() || $wp_query->posts ) {
 
                         $success = true;
                         if ( is_singular() ) {

src/wp-includes/default-filters.php

@@ -338 +338 @@
 add_action( 'do_feed_atom', 'do_feed_atom', 10, 1 );
 add_action( 'do_pings', 'do_all_pings', 10, 0 );
 add_action( 'do_robots', 'do_robots' );
+add_action( 'do_favicon', 'do_favicon' );
 add_action( 'set_comment_cookies', 'wp_set_comment_cookies', 10, 3 );
 add_action( 'sanitize_comment_cookies', 'sanitize_comment_cookies' );
 add_action( 'admin_print_scripts', 'print_emoji_detection_script' );

src/wp-includes/functions.php

@@ -1637 +1637 @@
 }
 
 /**
+ * Display the favicon.ico file content.
+ *
+ * @since 5.4.0
+ */
+function do_favicon() {
+        /**
+         * Fires when serving the favicon.ico file.
+         *
+         * @since 5.4.0
+         */
+        do_action( 'do_faviconico' );
+
+        if ( has_site_icon() ) {
+                $site_icon_id = get_option( 'site_icon' );
+                $site_icon    = wp_get_attachment_image_src( $site_icon_id, array( 32, 32 ) );
+                $site_icon    = $site_icon[0];
+        } else {
+                $site_icon = ABSPATH . 'wp-admin/images/w-logo-blue.png';
+        }
+
+        $filetype = wp_check_filetype( $site_icon );
+        if ( $filetype['type'] ) {
+                $mime_type = $filetype['type'];
+        } else {
+                $mime_type = 'image/x-icon';
+        }
+
+        header( "Content-Type: $mime_type" );
+        readfile( $site_icon );
+        exit;
+}
+
+/**
  * Determines whether WordPress is already installed.
  *
  * The cache will be checked first. If you have a cache plugin, which saves

src/wp-includes/load.php

@@ -160 +160 @@
  * Instead, send the headers for a zero-length favicon and bail.
  *
  * @since 3.0.0
+ * @deprecated 5.4.0 Deprecated in favor of do_favicon().
  */
 function wp_favicon_request() {
         if ( '/favicon.ico' == $_SERVER['REQUEST_URI'] ) {

src/wp-includes/query.php

@@ -623 +623 @@
 }
 
 /**
- * Is the query for the robots file?
+ * Is the query for the robots.txt file?
  *
  * @since 2.1.0
  *
@@ -643 +643 @@
 }
 
 /**
+ * Is the query for the favicon.ico file?
+ *
+ * @since 5.4.0
+ *
+ * @global WP_Query $wp_query Global WP_Query instance.
+ *
+ * @return bool
+ */
+function is_favicon() {
+        global $wp_query;
+
+        if ( ! isset( $wp_query ) ) {
+                _doing_it_wrong( __FUNCTION__, __( 'Conditional query tags do not work before the query is run. Before then, they always return false.' ), '3.1.0' );
+                return false;
+        }
+
+        return $wp_query->is_favicon();
+}
+
+/**
  * Determines whether the query is for a search.
  *
  * For more information on this and similar theme functions, check out

src/wp-includes/template-loader.php

@@ -36 +36 @@
          */
         do_action( 'do_robots' );
         return;
+} elseif ( is_favicon() ) {
+        /**
+         * Fired when the template loader determines a favicon.ico request.
+         *
+         * @since 5.4.0
+         */
+        do_action( 'do_favicon' );
+        return;
 } elseif ( is_feed() ) {
         do_feed();
         return;

src/wp-includes/version.php

@@ -20 +20 @@
  *
  * @global int $wp_db_version
  */
-$wp_db_version = 45805;
+$wp_db_version = 47017;
 
 /**
  * Holds the TinyMCE version

src/wp-settings.php

@@ -63 +63 @@
 // Standardize $_SERVER variables across setups.
 wp_fix_server_vars();
 
-// Check if we have received a request due to missing favicon.ico
-wp_favicon_request();
-
 // Check if we're in maintenance mode.
 wp_maintenance();