WordPress 4.5
[autoinstalls/wordpress.git] / wp-includes / canonical.php
index c1b90251cf2fd211e9b0caabffad6f50630465e8..87afcce2f7a551f34768aca9d4518ab82719c18d 100644 (file)
@@ -17,7 +17,7 @@
  * prevents penalty for duplicate content by redirecting all incoming links to
  * one or the other.
  *
- * Prevents redirection for feeds, trackbacks, searches, comment popup, and
+ * 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.
  * or query in an attempt to figure the correct page to go to.
  *
  * @since 2.3.0
- * @uses $wp_rewrite
- * @uses $is_IIS
+ *
+ * @global WP_Rewrite $wp_rewrite
+ * @global bool $is_IIS
+ * @global WP_Query $wp_query
+ * @global wpdb $wpdb WordPress database abstraction object.
  *
  * @param string $requested_url Optional. The URL that was requested, used to
  *             figure if redirect is needed.
  * @param bool $do_redirect Optional. Redirect to the new URL.
- * @return null|false|string Null, if redirect not needed. False, if redirect
- *             not needed or the string of the URL
+ * @return string|void The string of the URL, if redirect needed.
  */
 function redirect_canonical( $requested_url = null, $do_redirect = true ) {
-       global $wp_rewrite, $is_IIS, $wp_query, $wpdb;
+       global $wp_rewrite, $is_IIS, $wp_query, $wpdb, $wp;
 
        if ( isset( $_SERVER['REQUEST_METHOD'] ) && ! in_array( strtoupper( $_SERVER['REQUEST_METHOD'] ), array( 'GET', 'HEAD' ) ) ) {
                return;
@@ -53,11 +55,11 @@ function redirect_canonical( $requested_url = null, $do_redirect = true ) {
                }
        }
 
-       if ( is_trackback() || is_search() || is_comments_popup() || is_admin() || is_preview() || is_robots() || ( $is_IIS && !iis7_supports_permalinks() ) ) {
+       if ( is_trackback() || is_search() || is_admin() || is_preview() || is_robots() || ( $is_IIS && !iis7_supports_permalinks() ) ) {
                return;
        }
 
-       if ( !$requested_url ) {
+       if ( ! $requested_url && isset( $_SERVER['HTTP_HOST'] ) ) {
                // build the URL in the address bar
                $requested_url  = is_ssl() ? 'https://' : 'http://';
                $requested_url .= $_SERVER['HTTP_HOST'];
@@ -65,14 +67,9 @@ function redirect_canonical( $requested_url = null, $do_redirect = true ) {
        }
 
        $original = @parse_url($requested_url);
-       if ( false === $original )
+       if ( false === $original ) {
                return;
-
-       // Some PHP setups turn requests for / into /index.php in REQUEST_URI
-       // See: http://trac.wordpress.org/ticket/5017
-       // See: http://trac.wordpress.org/ticket/7173
-       // Disabled, for now:
-       // $original['path'] = preg_replace('|/index\.php$|', '/', $original['path']);
+       }
 
        $redirect = $original;
        $redirect_url = false;
@@ -83,6 +80,11 @@ function redirect_canonical( $requested_url = null, $do_redirect = true ) {
        if ( !isset($redirect['query']) )
                $redirect['query'] = '';
 
+       // If the original URL ended with non-breaking spaces, they were almost
+       // certainly inserted by accident. Let's remove them, so the reader doesn't
+       // see a 404 error with no obvious cause.
+       $redirect['path'] = preg_replace( '|(%C2%A0)+$|i', '', $redirect['path'] );
+
        // It's not a preview, so remove it from URL
        if ( get_query_var( 'preview' ) ) {
                $redirect['query'] = remove_query_arg( 'preview', $redirect['query'] );
@@ -115,7 +117,7 @@ function redirect_canonical( $requested_url = null, $do_redirect = true ) {
                $id = max( get_query_var('p'), get_query_var('page_id'), get_query_var('attachment_id') );
                if ( $id && $redirect_post = get_post($id) ) {
                        $post_type_obj = get_post_type_object($redirect_post->post_type);
-                       if ( $post_type_obj->public ) {
+                       if ( $post_type_obj->public && 'auto-draft' != $redirect_post->post_status ) {
                                $redirect_url = get_permalink($redirect_post);
                                $redirect['query'] = _remove_qs_args_if_not_in_url( $redirect['query'], array( 'p', 'page_id', 'attachment_id', 'pagename', 'name', 'post_type' ), $redirect_url );
                        }
@@ -141,11 +143,26 @@ function redirect_canonical( $requested_url = null, $do_redirect = true ) {
                        }
                }
 
+               if ( get_query_var( 'page' ) && $wp_query->post &&
+                       false !== strpos( $wp_query->post->post_content, '<!--nextpage-->' ) ) {
+                       $redirect['path'] = rtrim( $redirect['path'], (int) get_query_var( 'page' ) . '/' );
+                       $redirect['query'] = remove_query_arg( 'page', $redirect['query'] );
+                       $redirect_url = get_permalink( $wp_query->post->ID );
+               }
+
        } elseif ( is_object($wp_rewrite) && $wp_rewrite->using_permalinks() ) {
                // rewriting of old ?p=X, ?m=2004, ?m=200401, ?m=20040101
-               if ( is_attachment() && !empty($_GET['attachment_id']) && ! $redirect_url ) {
-                       if ( $redirect_url = get_attachment_link(get_query_var('attachment_id')) )
-                               $redirect['query'] = remove_query_arg('attachment_id', $redirect['query']);
+               if ( is_attachment() &&
+                       ! array_diff( array_keys( $wp->query_vars ), array( 'attachment', 'attachment_id' ) ) &&
+                       ! $redirect_url ) {
+                       if ( ! empty( $_GET['attachment_id'] ) ) {
+                               $redirect_url = get_attachment_link( get_query_var( 'attachment_id' ) );
+                               if ( $redirect_url ) {
+                                       $redirect['query'] = remove_query_arg( 'attachment_id', $redirect['query'] );
+                               }
+                       } else {
+                               $redirect_url = get_attachment_link();
+                       }
                } elseif ( is_single() && !empty($_GET['p']) && ! $redirect_url ) {
                        if ( $redirect_url = get_permalink(get_query_var('p')) )
                                $redirect['query'] = remove_query_arg(array('p', 'post_type'), $redirect['query']);
@@ -155,7 +172,7 @@ function redirect_canonical( $requested_url = null, $do_redirect = true ) {
                } elseif ( is_page() && !empty($_GET['page_id']) && ! $redirect_url ) {
                        if ( $redirect_url = get_permalink(get_query_var('page_id')) )
                                $redirect['query'] = remove_query_arg('page_id', $redirect['query']);
-               } elseif ( is_page() && !is_feed() && isset($wp_query->queried_object) && 'page' == get_option('show_on_front') && $wp_query->queried_object->ID == get_option('page_on_front')  && ! $redirect_url ) {
+               } elseif ( is_page() && !is_feed() && 'page' == get_option('show_on_front') && get_queried_object_id() == get_option('page_on_front')  && ! $redirect_url ) {
                        $redirect_url = home_url('/');
                } elseif ( is_home() && !empty($_GET['page_id']) && 'page' == get_option('show_on_front') && get_query_var('page_id') == get_option('page_for_posts')  && ! $redirect_url ) {
                        if ( $redirect_url = get_permalink(get_option('page_for_posts')) )
@@ -194,7 +211,7 @@ function redirect_canonical( $requested_url = null, $do_redirect = true ) {
                } elseif ( is_category() || is_tag() || is_tax() ) { // Terms (Tags/categories)
 
                        $term_count = 0;
-                       foreach ( $wp_query->tax_query->queries as $tax_query )
+                       foreach ( $wp_query->tax_query->queried_terms as $tax_query )
                                $term_count += count( $tax_query['terms'] );
 
                        $obj = $wp_query->get_queried_object();
@@ -245,20 +262,28 @@ function redirect_canonical( $requested_url = null, $do_redirect = true ) {
                }
 
                // Post Paging
-               if ( is_singular() && ! is_front_page() && get_query_var('page') ) {
+               if ( is_singular() && get_query_var('page') ) {
                        if ( !$redirect_url )
                                $redirect_url = get_permalink( get_queried_object_id() );
-                       $redirect_url = trailingslashit( $redirect_url ) . user_trailingslashit( get_query_var( 'page' ), 'single_paged' );
+
+                       $page = get_query_var( 'page' );
+                       if ( $page > 1 ) {
+                               if ( is_front_page() ) {
+                                       $redirect_url = trailingslashit( $redirect_url ) . user_trailingslashit( "$wp_rewrite->pagination_base/$page", 'paged' );
+                               } else {
+                                       $redirect_url = trailingslashit( $redirect_url ) . user_trailingslashit( $page, 'single_paged' );
+                               }
+                       }
                        $redirect['query'] = remove_query_arg( 'page', $redirect['query'] );
                }
 
                // paging and feeds
                if ( get_query_var('paged') || is_feed() || get_query_var('cpage') ) {
-                       while ( preg_match( "#/$wp_rewrite->pagination_base/?[0-9]+?(/+)?$#", $redirect['path'] ) || preg_match( '#/(comments/?)?(feed|rss|rdf|atom|rss2)(/+)?$#', $redirect['path'] ) || preg_match( '#/comment-page-[0-9]+(/+)?$#', $redirect['path'] ) ) {
+                       while ( preg_match( "#/$wp_rewrite->pagination_base/?[0-9]+?(/+)?$#", $redirect['path'] ) || preg_match( '#/(comments/?)?(feed|rss|rdf|atom|rss2)(/+)?$#', $redirect['path'] ) || preg_match( "#/{$wp_rewrite->comments_pagination_base}-[0-9]+(/+)?$#", $redirect['path'] ) ) {
                                // Strip off paging and feed
                                $redirect['path'] = preg_replace("#/$wp_rewrite->pagination_base/?[0-9]+?(/+)?$#", '/', $redirect['path']); // strip off any existing paging
                                $redirect['path'] = preg_replace('#/(comments/?)?(feed|rss2?|rdf|atom)(/+|$)#', '/', $redirect['path']); // strip off feed endings
-                               $redirect['path'] = preg_replace('#/comment-page-[0-9]+?(/+)?$#', '/', $redirect['path']); // strip off any existing comment paging
+                               $redirect['path'] = preg_replace("#/{$wp_rewrite->comments_pagination_base}-[0-9]+?(/+)?$#", '/', $redirect['path']); // strip off any existing comment paging
                        }
 
                        $addl_path = '';
@@ -301,8 +326,11 @@ function redirect_canonical( $requested_url = null, $do_redirect = true ) {
                                }
                        }
 
-                       if ( get_option('page_comments') && ( ( 'newest' == get_option('default_comments_page') && get_query_var('cpage') > 0 ) || ( 'newest' != get_option('default_comments_page') && get_query_var('cpage') > 1 ) ) ) {
-                               $addl_path = ( !empty( $addl_path ) ? trailingslashit($addl_path) : '' ) . user_trailingslashit( 'comment-page-' . get_query_var('cpage'), 'commentpaged' );
+                       if ( get_option( 'page_comments' ) && (
+                               ( 'newest' == get_option( 'default_comments_page' ) && get_query_var( 'cpage' ) > 0 ) ||
+                               ( 'newest' != get_option( 'default_comments_page' ) && get_query_var( 'cpage' ) > 1 )
+                       ) ) {
+                               $addl_path = ( !empty( $addl_path ) ? trailingslashit($addl_path) : '' ) . user_trailingslashit( $wp_rewrite->comments_pagination_base . '-' . get_query_var('cpage'), 'commentpaged' );
                                $redirect['query'] = remove_query_arg( 'cpage', $redirect['query'] );
                        }
 
@@ -319,7 +347,7 @@ function redirect_canonical( $requested_url = null, $do_redirect = true ) {
                                /** This filter is documented in wp-login.php */
                                $redirect_url = apply_filters( 'wp_signup_location', network_site_url( 'wp-signup.php' ) );
                        } else {
-                               $redirect_url = site_url( 'wp-login.php?action=register' );
+                               $redirect_url = wp_registration_url();
                        }
 
                        wp_redirect( $redirect_url, 301 );
@@ -360,10 +388,6 @@ function redirect_canonical( $requested_url = null, $do_redirect = true ) {
        else
                unset($redirect['port']);
 
-       if ( ! empty( $user_home['scheme'] ) && $user_home['scheme'] === 'https' ) {
-               $redirect['scheme'] = 'https';
-       }
-
        // trailing /index.php
        $redirect['path'] = preg_replace('|/' . preg_quote( $wp_rewrite->index, '|' ) . '/*?$|', '/', $redirect['path']);
 
@@ -421,7 +445,7 @@ function redirect_canonical( $requested_url = null, $do_redirect = true ) {
                ( strtolower($original['host']) != 'www.' . strtolower($redirect['host']) && 'www.' . strtolower($original['host']) != strtolower($redirect['host']) ) )
                $redirect['host'] = $original['host'];
 
-       $compare_original = array( $original['scheme'], $original['host'], $original['path'] );
+       $compare_original = array( $original['host'], $original['path'] );
 
        if ( !empty( $original['port'] ) )
                $compare_original[] = $original['port'];
@@ -429,7 +453,7 @@ function redirect_canonical( $requested_url = null, $do_redirect = true ) {
        if ( !empty( $original['query'] ) )
                $compare_original[] = $original['query'];
 
-       $compare_redirect = array( $redirect['scheme'], $redirect['host'], $redirect['path'] );
+       $compare_redirect = array( $redirect['host'], $redirect['path'] );
 
        if ( !empty( $redirect['port'] ) )
                $compare_redirect[] = $redirect['port'];
@@ -446,8 +470,9 @@ function redirect_canonical( $requested_url = null, $do_redirect = true ) {
                        $redirect_url .= '?' . $redirect['query'];
        }
 
-       if ( !$redirect_url || $redirect_url == $requested_url )
-               return false;
+       if ( ! $redirect_url || $redirect_url == $requested_url ) {
+               return;
+       }
 
        // Hex encoded octets are case-insensitive.
        if ( false !== strpos($requested_url, '%') ) {
@@ -471,8 +496,10 @@ function redirect_canonical( $requested_url = null, $do_redirect = true ) {
         */
        $redirect_url = apply_filters( 'redirect_canonical', $redirect_url, $requested_url );
 
-       if ( !$redirect_url || $redirect_url == $requested_url ) // yes, again -- in case the filter aborted the request
-               return false;
+       // yes, again -- in case the filter aborted the request
+       if ( ! $redirect_url || strip_fragment_from_url( $redirect_url ) == strip_fragment_from_url( $requested_url ) ) {
+               return;
+       }
 
        if ( $do_redirect ) {
                // protect against chained redirects
@@ -482,7 +509,7 @@ function redirect_canonical( $requested_url = null, $do_redirect = true ) {
                } else {
                        // Debug
                        // die("1: $redirect_url<br />2: " . redirect_canonical( $redirect_url, false ) );
-                       return false;
+                       return;
                }
        } else {
                return $redirect_url;
@@ -496,6 +523,9 @@ function redirect_canonical( $requested_url = null, $do_redirect = true ) {
  * @since 3.4.0
  * @access private
  *
+ * @param string $query_string
+ * @param array $args_to_check
+ * @param string $url
  * @return string The altered query string
  */
 function _remove_qs_args_if_not_in_url( $query_string, Array $args_to_check, $url ) {
@@ -512,16 +542,42 @@ function _remove_qs_args_if_not_in_url( $query_string, Array $args_to_check, $ur
        return $query_string;
 }
 
+/**
+ * Strips the #fragment from a URL, if one is present.
+ *
+ * @since 4.4.0
+ *
+ * @param string $url The URL to strip.
+ * @return string The altered URL.
+ */
+function strip_fragment_from_url( $url ) {
+       $parsed_url = @parse_url( $url );
+       if ( ! empty( $parsed_url['host'] ) ) {
+               // This mirrors code in redirect_canonical(). It does not handle every case.
+               $url = $parsed_url['scheme'] . '://' . $parsed_url['host'];
+               if ( ! empty( $parsed_url['port'] ) ) {
+                       $url .= ':' . $parsed_url['port'];
+               }
+               $url .= $parsed_url['path'];
+               if ( ! empty( $parsed_url['query'] ) ) {
+                       $url .= '?' . $parsed_url['query'];
+               }
+       }
+
+       return $url;
+}
+
 /**
  * Attempts to guess the correct URL based on query vars
  *
  * @since 2.3.0
- * @uses $wpdb
  *
- * @return bool|string The correct URL if one is found. False on failure.
+ * @global wpdb $wpdb WordPress database abstraction object.
+ *
+ * @return false|string The correct URL if one is found. False on failure.
  */
 function redirect_guess_404_permalink() {
-       global $wpdb, $wp_rewrite;
+       global $wpdb;
 
        if ( get_query_var('name') ) {
                $where = $wpdb->prepare("post_name LIKE %s", $wpdb->esc_like( get_query_var('name') ) . '%');
@@ -544,7 +600,7 @@ function redirect_guess_404_permalink() {
                        return false;
                if ( get_query_var( 'feed' ) )
                        return get_post_comments_feed_link( $post_id, get_query_var( 'feed' ) );
-               elseif ( get_query_var( 'page' ) )
+               elseif ( get_query_var( 'page' ) && 1 < get_query_var( 'page' ) )
                        return trailingslashit( get_permalink( $post_id ) ) . user_trailingslashit( get_query_var( 'page' ), 'single_paged' );
                else
                        return get_permalink( $post_id );
@@ -553,8 +609,16 @@ function redirect_guess_404_permalink() {
        return false;
 }
 
-add_action('template_redirect', 'redirect_canonical');
-
+/**
+ * Redirects a variety of shorthand URLs to the admin.
+ *
+ * If a user visits example.com/admin, they'll be redirected to /wp-admin.
+ * Visiting /login redirects to /wp-login.php, and so on.
+ *
+ * @since 3.4.0
+ *
+ * @global WP_Rewrite $wp_rewrite
+ */
 function wp_redirect_admin_locations() {
        global $wp_rewrite;
        if ( ! ( is_404() && $wp_rewrite->using_permalinks() ) )
@@ -578,9 +642,7 @@ function wp_redirect_admin_locations() {
                site_url( 'login', 'relative' ),
        );
        if ( in_array( untrailingslashit( $_SERVER['REQUEST_URI'] ), $logins ) ) {
-               wp_redirect( site_url( 'wp-login.php', 'login' ) );
+               wp_redirect( wp_login_url() );
                exit;
        }
 }
-
-add_action( 'template_redirect', 'wp_redirect_admin_locations', 1000 );