196 lines
4.2 KiB
PHP
196 lines
4.2 KiB
PHP
<?php
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/**
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* Add support for headless WP.
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*
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* @since 1.0.15
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* @package RankMath
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* @subpackage RankMath\Rest
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* @author Rank Math <support@rankmath.com>
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*/
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namespace RankMath\Rest;
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use WP_Error;
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use WP_REST_Server;
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use WP_REST_Request;
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use WP_REST_Response;
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use WP_REST_Controller;
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use RankMath\Helpers\Url;
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use RankMath\Helper;
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use RankMath\Frontend\Frontend;
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defined( 'ABSPATH' ) || exit;
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/**
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* Front class.
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*/
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class Headless extends WP_REST_Controller {
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/**
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* Whether the request is for the homepage.
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*
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* @var boolean
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*/
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public $is_home = false;
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/**
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* Constructor.
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*/
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public function __construct() {
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$this->namespace = \RankMath\Rest\Rest_Helper::BASE;
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}
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/**
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* Registers the routes for the objects of the controller.
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*/
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public function register_routes() {
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if ( ! Helper::get_settings( 'general.headless_support' ) ) {
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return;
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}
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register_rest_route(
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$this->namespace,
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'/getHead',
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[
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'methods' => WP_REST_Server::READABLE,
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'callback' => [ $this, 'get_head' ],
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'permission_callback' => '__return_true',
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'args' => [
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'url' => [
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'type' => 'string',
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'required' => true,
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'description' => esc_html__( 'URL to get HTML tags for.', 'rank-math' ),
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'validate_callback' => [ $this, 'is_valid_url' ],
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],
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],
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]
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);
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}
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/**
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* Get all tags that go in the <head>. Useful for headless WP installations.
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*
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* @param WP_REST_Request $request Request object, should include the "url" parameter.
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*
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* @return WP_REST_Response|WP_Error Response object on success, or WP_Error object on failure.
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*/
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public function get_head( WP_REST_Request $request ) {
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$resp = new WP_REST_Response();
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$url = $request->get_param( 'url' );
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$html = $this->get_html_head( $url );
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$resp->set_status( 200 );
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$resp->set_data(
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[
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'success' => true,
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'head' => $html,
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]
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);
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return $resp;
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}
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/**
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* Return Rank Math head HTML output for the given URL.
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*
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* @param string $url Request URL.
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*
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* @return string
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*/
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private function get_html_head( $url ) {
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$this->setup_post_head( $url );
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ob_start();
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do_action( 'wp' );
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do_action( 'rank_math/head' );
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return ob_get_clean();
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}
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/**
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* Prepare head output for a URL.
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*
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* @param string $url Request URL.
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*
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* @return void
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*/
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private function setup_post_head( $url ) {
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// Setup WordPress.
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$_SERVER['REQUEST_URI'] = $this->generate_request_uri( $url );
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remove_all_actions( 'wp' );
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remove_all_actions( 'parse_request' );
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wp();
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if ( $this->is_home ) {
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$GLOBALS['wp_query']->is_home = true;
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}
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remove_filter( 'option_rewrite_rules', [ $this, 'fix_query_notice' ] );
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header( 'Content-Type: application/json; charset=UTF-8' );
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// Setup Rank Math.
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rank_math()->variables->setup();
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rank_math()->manager->load_modules();
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new Frontend();
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}
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/**
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* Generate $_SERVER['REQUEST_URI'] value based on input URL.
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*
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* @param string $url Input URL.
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* @return string
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*/
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public function generate_request_uri( $url ) {
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$quoted = preg_quote( rtrim( home_url(), '/' ), '/' );
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$request_uri = preg_replace( sprintf( '/^%s/i', $quoted ), '', rtrim( $url, '/' ) );
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if ( empty( $request_uri ) ) {
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$request_uri = '/';
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$this->is_home = true;
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$front_page_id = get_option( 'page_on_front' );
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if ( 'page' === get_option( 'show_on_front' ) && $front_page_id ) {
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$this->is_home = false;
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$request_uri = get_post_field( 'post_name', $front_page_id );
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}
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add_filter( 'option_rewrite_rules', [ $this, 'fix_query_notice' ] );
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}
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return $request_uri;
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}
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/**
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* Filter rewrite_rules to avoid a PHP notice.
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*
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* @param array $rules Original rules.
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* @return array
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*/
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public function fix_query_notice( $rules ) {
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if ( ! is_array( $rules ) || isset( $rules['$'] ) ) {
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return $rules;
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}
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global $wp_rewrite;
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$rules['$'] = $wp_rewrite->index;
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return $rules;
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}
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/**
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* Check if provided URL is valid and internal.
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*
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* @param string $url URL.
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*
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* @return boolean
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*/
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public function is_valid_url( $url ) {
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$url = preg_replace_callback(
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'/[^\x20-\x7f]/',
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function( $match ) {
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return rawurlencode( $match[0] );
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},
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$url
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);
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return Url::is_url( $url ) && ! Url::is_external( $url );
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}
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}
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