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<?php
/**
* WPSEO plugin file.
*
* @package WPSEO\XML_Sitemaps
*/
/**
* Rewrite setup and handling for sitemaps functionality.
*/
class WPSEO_Sitemaps_Router {
/**
* Sets up init logic.
*/
public function __construct() {
add_action( 'init', array( $this, 'init' ), 1 );
add_filter( 'redirect_canonical', array( $this, 'redirect_canonical' ) );
add_action( 'template_redirect', array( $this, 'template_redirect' ), 0 );
}
/**
* Sets up rewrite rules.
*/
public function init() {
global $wp;
$wp->add_query_var( 'sitemap' );
$wp->add_query_var( 'sitemap_n' );
$wp->add_query_var( 'yoast-sitemap-xsl' );
add_rewrite_rule( 'sitemap_index\.xml$', 'index.php?sitemap=1', 'top' );
add_rewrite_rule( '([^/]+?)-sitemap([0-9]+)?\.xml$', 'index.php?sitemap=$matches[1]&sitemap_n=$matches[2]', 'top' );
add_rewrite_rule( '([a-z]+)?-?sitemap\.xsl$', 'index.php?yoast-sitemap-xsl=$matches[1]', 'top' );
}
/**
* Stop trailing slashes on sitemap.xml URLs.
*
* @param string $redirect The redirect URL currently determined.
*
* @return bool|string $redirect
*/
public function redirect_canonical( $redirect ) {
if ( get_query_var( 'sitemap' ) || get_query_var( 'yoast-sitemap-xsl' ) ) {
return false;
}
return $redirect;
}
/**
* Redirects sitemap.xml to sitemap_index.xml.
*/
public function template_redirect() {
if ( ! $this->needs_sitemap_index_redirect() ) {
return;
}
header( 'X-Redirect-By: Yoast SEO' );
wp_redirect( home_url( '/sitemap_index.xml' ), 301, 'Yoast SEO' );
exit;
}
/**
* Checks whether the current request needs to be redirected to sitemap_index.xml.
*
* @global WP_Query $wp_query Current query.
*
* @return bool True if redirect is needed, false otherwise.
*/
public function needs_sitemap_index_redirect() {
global $wp_query;
$protocol = 'http://';
if ( ! empty( $_SERVER['HTTPS'] ) && $_SERVER['HTTPS'] === 'on' ) {
$protocol = 'https://';
}
$domain = '';
if ( isset( $_SERVER['SERVER_NAME'] ) ) {
$domain = sanitize_text_field( wp_unslash( $_SERVER['SERVER_NAME'] ) );
}
$path = '';
if ( isset( $_SERVER['REQUEST_URI'] ) ) {
$path = sanitize_text_field( wp_unslash( $_SERVER['REQUEST_URI'] ) );
}
// Due to different environment configurations, we need to check both SERVER_NAME and HTTP_HOST.
$check_urls = array( $protocol . $domain . $path );
if ( ! empty( $_SERVER['HTTP_HOST'] ) ) {
$check_urls[] = $protocol . sanitize_text_field( wp_unslash( $_SERVER['HTTP_HOST'] ) ) . $path;
}
return $wp_query->is_404 && in_array( home_url( '/sitemap.xml' ), $check_urls, true );
}
/**
* Create base URL for the sitemap.
*
* @param string $page Page to append to the base URL.
*
* @return string base URL (incl page)
*/
public static function get_base_url( $page ) {
global $wp_rewrite;
$base = $wp_rewrite->using_index_permalinks() ? 'index.php/' : '/';
/**
* Filter the base URL of the sitemaps.
*
* @param string $base The string that should be added to home_url() to make the full base URL.
*/
$base = apply_filters( 'wpseo_sitemaps_base_url', $base );
/*
* Get the scheme from the configured home URL instead of letting WordPress
* determine the scheme based on the requested URI.
*/
return home_url( $base . $page, wp_parse_url( get_option( 'home' ), PHP_URL_SCHEME ) );
}
}
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