Changeset 10487

Timestamp:

12/04/2020 02:20:12 AM (6 years ago)

Author:

dd32

Message:

Redirects: Catch some malformed URL requests and redirect it to a better location.

Fixes #5528.

File:

• sites/trunk/wordpress.org/public_html/wp-content/mu-plugins/pub/wporg-redirects.php (modified) (1 diff)

sites/trunk/wordpress.org/public_html/wp-content/mu-plugins/pub/wporg-redirects.php

@@ -99 +99 @@
 
 /**
+ * Redirect some invalid/malformed URL requests to their proper locations.
+ */
+add_action( 'template_redirect', function() {
+        global $wp;
+
+        if ( ! is_404() ) {
+                return;
+        }
+
+        $name = false;
+        foreach ( [ 'name', 'attachment', 'pagename' ] as $field ) {
+                if ( isset( $wp->query_vars[ $field ] ) ) {
+                        // Get the raw unmodified query var from WP directly.
+                        $name = urldecode( $wp->query_vars[ $field ] );
+                }
+        }
+        if ( ! $name ) {
+                return;
+        }
+
+        $new_path = $path = $_SERVER['REQUEST_URI'];
+
+        // Remove any common URL paths.
+        $new_path = preg_replace( '!^/?(index|contact(-us)?)(\.(html?|php))?!i', '', $new_path );
+
+        // Remove any `<a>` attributes from the URL.
+        $new_path = preg_replace( '!(target|rel|href)=?(.+)$!i', '', $new_path );
+
+        // Remove any trailing punctuation.
+        $new_path = preg_replace( '!([ +\'"\W]|(?:%20))+$!', '', $new_path );
+
+        if ( $path === $new_path ) {
+                return;
+        }
+
+        // Determine URL, save a redirect and check the canonical too.
+        $url = home_url( $new_path );
+        if ( $canonical_url = redirect_canonical( $url, false ) ) {
+                $url = $canonical_url;
+        }
+
+        wp_safe_redirect( $url, 301, 'W.org Redirects Malformed URLs' );
+        die();
+
+}, 20 ); // After canonical.
+
+/**
  * Handle the domain-based redirects
  *