874 lines
24 KiB
PHP
874 lines
24 KiB
PHP
<?php
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/**
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* Class Hotlinking_Controller
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*
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* @link https://github.com/googleforcreators/web-stories-wp
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*
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* @copyright 2021 Google LLC
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* @license https://www.apache.org/licenses/LICENSE-2.0 Apache License 2.0
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*/
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/**
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* Copyright 2021 Google LLC
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* https://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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declare(strict_types = 1);
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namespace Google\Web_Stories\REST_API;
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use Google\Web_Stories\Infrastructure\HasRequirements;
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use Google\Web_Stories\Media\Types;
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use Google\Web_Stories\Story_Post_Type;
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use WP_Error;
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use WP_Http;
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use WP_REST_Request;
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use WP_REST_Response;
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use WP_REST_Server;
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/**
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* Hotlinking_Controller class.
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*
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* API endpoint for pinging and hotlinking media URLs.
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*
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* @SuppressWarnings(PHPMD.ExcessiveClassComplexity)
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*
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* @phpstan-type LinkData array{
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* ext?: string,
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* file_name?: string,
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* file_size?: int,
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* mime_type?: string,
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* type?: string
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* }
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*
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* @phpstan-type SchemaEntry array{
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* description: string,
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* type: string,
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* context: string[],
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* default?: mixed,
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* enum?: string[]
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* }
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*
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* @phpstan-type Schema array{
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* properties: array{
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* ext?: SchemaEntry,
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* file_name?: SchemaEntry,
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* file_size?: SchemaEntry,
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* mime_type?: SchemaEntry,
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* type?: SchemaEntry
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* }
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* }
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* @phpstan-type URLParts array{
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* scheme?: string,
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* user?: string,
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* pass?: string,
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* host?: string,
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* port?: int,
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* path?: string,
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* query?: string
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* }
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*/
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class Hotlinking_Controller extends REST_Controller implements HasRequirements {
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public const PROXY_HEADERS_ALLOWLIST = [
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'Content-Type',
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'Cache-Control',
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'Etag',
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'Last-Modified',
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'Content-Range',
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];
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/**
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* Story_Post_Type instance.
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*
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* @var Story_Post_Type Story_Post_Type instance.
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*/
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private Story_Post_Type $story_post_type;
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/**
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* Types instance.
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*
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* @var Types Types instance.
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*/
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private Types $types;
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/**
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* File pointer resource.
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*
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* @var resource
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*/
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protected $stream_handle;
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/**
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* Constructor.
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*
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* @param Story_Post_Type $story_post_type Story_Post_Type instance.
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* @param Types $types Types instance.
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* @return void
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*/
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public function __construct( Story_Post_Type $story_post_type, Types $types ) {
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$this->story_post_type = $story_post_type;
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$this->types = $types;
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$this->namespace = 'web-stories/v1';
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$this->rest_base = 'hotlink';
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}
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/**
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* Get the list of service IDs required for this service to be registered.
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*
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* Needed because the story post type needs to be registered first.
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*
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* @since 1.13.0
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*
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* @return string[] List of required services.
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*/
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public static function get_requirements(): array {
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return [ 'story_post_type' ];
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}
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/**
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* Registers routes for urls.
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*
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* @since 1.11.0
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*
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* @see register_rest_route()
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*/
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public function register_routes(): void {
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register_rest_route(
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$this->namespace,
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'/' . $this->rest_base . '/validate',
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[
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[
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'methods' => WP_REST_Server::READABLE,
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'callback' => [ $this, 'parse_url' ],
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'permission_callback' => [ $this, 'parse_url_permissions_check' ],
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'args' => [
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'url' => [
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'description' => __( 'The URL to process.', 'web-stories' ),
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'required' => true,
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'type' => 'string',
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'format' => 'uri',
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'validate_callback' => [ $this, 'validate_callback' ],
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'sanitize_callback' => 'esc_url_raw',
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],
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],
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],
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]
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);
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register_rest_route(
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$this->namespace,
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'/' . $this->rest_base . '/proxy',
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[
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[
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'methods' => WP_REST_Server::READABLE,
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'callback' => [ $this, 'proxy_url' ],
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'permission_callback' => [ $this, 'parse_url_permissions_check' ],
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'args' => [
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'url' => [
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'description' => __( 'The URL to process.', 'web-stories' ),
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'required' => true,
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'type' => 'string',
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'format' => 'uri',
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'validate_callback' => [ $this, 'validate_callback' ],
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'sanitize_callback' => 'esc_url_raw',
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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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/**
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* Parses a URL to return some metadata for inserting external media.
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*
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* @SuppressWarnings(PHPMD.NPathComplexity)
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* @SuppressWarnings(PHPMD.ExcessiveMethodLength)
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*
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* @since 1.11.0
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*
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* @param WP_REST_Request $request Full data about the request.
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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 parse_url( WP_REST_Request $request ) {
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/**
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* Requested URL.
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*
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* @var string $raw_url
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*/
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$raw_url = $request['url'];
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$raw_url = untrailingslashit( $raw_url );
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$url_or_ip = $this->validate_url( $raw_url );
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$host = wp_parse_url( $raw_url, PHP_URL_HOST );
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if ( ! $url_or_ip || ! $host ) {
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return new WP_Error( 'rest_invalid_url', __( 'Invalid URL', 'web-stories' ), [ 'status' => 400 ] );
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}
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/**
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* Filters the hotlinking data TTL value.
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*
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* @since 1.11.0
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*
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* @param int $time Time to live (in seconds). Default is 1 day.
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* @param string $url The attempted URL.
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*/
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$cache_ttl = apply_filters( 'web_stories_hotlinking_url_data_cache_ttl', DAY_IN_SECONDS, $raw_url );
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$cache_key = 'web_stories_url_data_' . md5( $raw_url );
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$data = get_transient( $cache_key );
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if ( \is_string( $data ) && ! empty( $data ) ) {
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/**
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* Decoded cached link data.
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*
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* @var array|null $link
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* @phpstan-var LinkData|null $link
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*/
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$link = json_decode( $data, true );
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if ( $link ) {
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$response = $this->prepare_item_for_response( $link, $request );
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return rest_ensure_response( $response );
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}
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}
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$callback = $this->get_curl_resolve_callback( $raw_url, $url_or_ip );
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add_action( 'http_api_curl', $callback );
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$response = wp_safe_remote_head(
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$raw_url,
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[
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'redirection' => 0, // No redirects allowed.
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'headers' => [
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'Host' => $host,
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],
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]
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);
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remove_action( 'http_api_curl', $callback );
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if ( is_wp_error( $response ) && 'http_request_failed' === $response->get_error_code() ) {
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return new WP_Error( 'rest_invalid_url', __( 'Invalid URL', 'web-stories' ), [ 'status' => 404 ] );
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}
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if ( WP_Http::OK !== wp_remote_retrieve_response_code( $response ) ) {
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return new WP_Error( 'rest_invalid_url', __( 'Invalid URL', 'web-stories' ), [ 'status' => 404 ] );
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}
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$headers = wp_remote_retrieve_headers( $response );
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$mime_type = $headers['content-type'];
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if ( $mime_type && str_contains( $mime_type, ';' ) ) {
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$pieces = explode( ';', $mime_type );
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$mime_type = array_shift( $pieces );
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}
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$file_size = (int) $headers['content-length'];
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$path = wp_parse_url( $raw_url, PHP_URL_PATH );
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if ( ! \is_string( $path ) ) {
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return new WP_Error( 'rest_invalid_url', __( 'Invalid URL', 'web-stories' ), [ 'status' => 404 ] );
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}
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$file_name = basename( $path );
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$exts = $this->types->get_file_type_exts( [ $mime_type ] );
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$ext = '';
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if ( $exts ) {
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$ext = end( $exts );
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}
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$allowed_mime_types = $this->get_allowed_mime_types();
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$type = '';
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foreach ( $allowed_mime_types as $key => $mime_types ) {
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if ( \in_array( $mime_type, $mime_types, true ) ) {
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$type = $key;
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break;
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}
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}
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$data = [
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'ext' => $ext,
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'file_name' => $file_name,
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'file_size' => $file_size,
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'mime_type' => $mime_type,
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'type' => $type,
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];
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set_transient( $cache_key, wp_json_encode( $data ), $cache_ttl );
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$response = $this->prepare_item_for_response( $data, $request );
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return rest_ensure_response( $response );
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}
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/**
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* Parses a URL to return proxied file.
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*
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* @SuppressWarnings(PHPMD.ErrorControlOperator)
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*
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* @since 1.13.0
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*
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* @param WP_REST_Request $request Full data about the request.
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* @return WP_Error|void Proxied data on success, error otherwise.
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*/
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public function proxy_url( WP_REST_Request $request ) {
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/**
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* Requested URL.
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*
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* @var string $raw_url
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*/
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$raw_url = $request['url'];
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$raw_url = untrailingslashit( $raw_url );
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$url_or_ip = $this->validate_url( $raw_url );
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$host = wp_parse_url( $raw_url, PHP_URL_HOST );
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if ( ! $url_or_ip || ! $host ) {
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return new WP_Error( 'rest_invalid_url', __( 'Invalid URL', 'web-stories' ), [ 'status' => 400 ] );
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}
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// Remove any relevant headers already set by WP_REST_Server::serve_request() // wp_get_nocache_headers().
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if ( ! headers_sent() ) {
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header_remove( 'Cache-Control' );
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header_remove( 'Content-Type' );
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header_remove( 'Expires' );
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header_remove( 'Last Modified' );
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}
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header( 'Cache-Control: max-age=3600' );
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header( 'Accept-Ranges: bytes' );
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$args = [
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'timeout' => 60, // phpcs:ignore WordPressVIPMinimum.Performance.RemoteRequestTimeout.timeout_timeout
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'blocking' => false,
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'headers' => [
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'Range' => $request->get_header( 'Range' ),
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'Host' => $host,
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],
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'redirection' => 0, // No redirects allowed.
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];
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$callback = $this->get_curl_resolve_callback( $raw_url, $url_or_ip );
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add_action( 'http_api_curl', $callback );
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$http = _wp_http_get_object();
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$transport = $http->_get_first_available_transport( $args, $raw_url );
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// When cURL is available, we might be able to use it together with fopen().
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if ( 'WP_Http_Curl' === $transport ) {
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// php://temp is a read-write streams that allows temporary data to be stored in a file-like wrapper.
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// Other than php://memory, php://temp will use a temporary file once the amount of data stored hits a predefined limit (the default is 2 MB).
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// The location of this temporary file is determined in the same way as the {@see sys_get_temp_dir()} function.
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if ( WP_DEBUG ) {
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$stream_handle = fopen( 'php://memory', 'wb' ); // phpcs:ignore WordPress.WP.AlternativeFunctions.file_system_operations_fopen
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} else {
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$stream_handle = @fopen( 'php://memory', 'wb' ); // phpcs:ignore WordPress.WP.AlternativeFunctions.file_system_operations_fopen, WordPress.PHP.NoSilencedErrors.Discouraged, Generic.PHP.NoSilencedErrors.Forbidden
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}
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if ( $stream_handle ) {
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$this->stream_handle = $stream_handle;
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$this->proxy_url_curl( $raw_url, $args );
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exit;
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}
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}
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// If either cURL is not available or fopen() did not succeed,
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// fall back to using whatever else is set up on the site,
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// presumably WP_Http_Streams or still WP_Http_Curl but without streams.
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unset( $args['blocking'] );
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$this->proxy_url_fallback( $raw_url, $args );
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exit;
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}
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/**
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* Prepares response asset response.
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*
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* @since 1.11.0
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*
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* @param LinkData|false $link URL data value, default to false is not set.
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* @param WP_REST_Request $request Request object.
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* @return WP_REST_Response|WP_Error Response object.
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*
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* @phpstan-param LinkData $link
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*/
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public function prepare_item_for_response( $link, $request ) {
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$fields = $this->get_fields_for_response( $request );
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$schema = $this->get_item_schema();
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$data = [];
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$error = new WP_Error();
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foreach ( $schema['properties'] as $field => $args ) {
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if ( ! isset( $link[ $field ] ) || ! rest_is_field_included( $field, $fields ) ) {
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continue;
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}
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$check = rest_validate_value_from_schema( $link[ $field ], $args, $field );
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if ( is_wp_error( $check ) ) {
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$error->add( 'rest_invalid_' . $field, $check->get_error_message(), [ 'status' => 400 ] );
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continue;
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}
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$data[ $field ] = rest_sanitize_value_from_schema( $link[ $field ], $args, $field );
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}
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if ( $error->get_error_codes() ) {
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return $error;
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}
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/**
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* Request context.
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*
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* @var string $context
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*/
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$context = ! empty( $request['context'] ) ? $request['context'] : 'view';
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$data = $this->add_additional_fields_to_object( $data, $request );
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$data = $this->filter_response_by_context( $data, $context );
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return rest_ensure_response( $data );
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}
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/**
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* Retrieves the link's schema, conforming to JSON Schema.
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*
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* @since 1.11.0
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*
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* @return array Item schema data.
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*
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* @phpstan-return Schema
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*/
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public function get_item_schema(): array {
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if ( $this->schema ) {
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/**
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* Schema.
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*
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* @phpstan-var Schema $schema
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*/
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$schema = $this->add_additional_fields_schema( $this->schema );
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return $schema;
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}
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$allowed_mime_types = $this->get_allowed_mime_types();
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$types = array_keys( $allowed_mime_types );
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$allowed_mime_types = array_merge( ...array_values( $allowed_mime_types ) );
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$exts = $this->types->get_file_type_exts( $allowed_mime_types );
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$schema = [
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'$schema' => 'http://json-schema.org/draft-04/schema#',
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'title' => 'link',
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'type' => 'object',
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'properties' => [
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'ext' => [
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'description' => __( 'File extension', 'web-stories' ),
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'type' => 'string',
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'context' => [ 'view', 'edit', 'embed' ],
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'enum' => $exts,
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],
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'file_name' => [
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'description' => __( 'File name', 'web-stories' ),
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'type' => 'string',
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'context' => [ 'view', 'edit', 'embed' ],
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],
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'file_size' => [
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'description' => __( 'File size', 'web-stories' ),
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'type' => 'integer',
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'context' => [ 'view', 'edit', 'embed' ],
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],
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'mime_type' => [
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'description' => __( 'Mime type', 'web-stories' ),
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'type' => 'string',
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'context' => [ 'view', 'edit', 'embed' ],
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'enum' => $allowed_mime_types,
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],
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'type' => [
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'description' => __( 'Type', 'web-stories' ),
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'type' => 'string',
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'context' => [ 'view', 'edit', 'embed' ],
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'enum' => $types,
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],
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],
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];
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$this->schema = $schema;
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/**
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* Schema.
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*
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* @phpstan-var Schema $schema
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*/
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$schema = $this->add_additional_fields_schema( $this->schema );
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return $schema;
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}
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/**
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* Checks if current user can process urls.
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*
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* @since 1.11.0
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*
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* @return true|WP_Error True if the request has read access, WP_Error object otherwise.
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*/
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public function parse_url_permissions_check() {
|
|
if ( ! $this->story_post_type->has_cap( 'edit_posts' ) ) {
|
|
return new WP_Error(
|
|
'rest_forbidden',
|
|
__( 'Sorry, you are not allowed to insert external media.', 'web-stories' ),
|
|
[ 'status' => rest_authorization_required_code() ]
|
|
);
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Callback to validate urls.
|
|
*
|
|
* @since 1.11.0
|
|
*
|
|
* @param string $value Value to be validated.
|
|
* @return true|WP_Error
|
|
*/
|
|
public function validate_callback( $value ) {
|
|
$url = untrailingslashit( $value );
|
|
|
|
if ( empty( $url ) || ! $this->validate_url( $url ) ) {
|
|
return new WP_Error( 'rest_invalid_url', __( 'Invalid URL', 'web-stories' ), [ 'status' => 400 ] );
|
|
}
|
|
|
|
$path = wp_parse_url( $url, PHP_URL_PATH );
|
|
|
|
if ( ! $path ) {
|
|
return new WP_Error( 'rest_invalid_url', __( 'Invalid URL', 'web-stories' ), [ 'status' => 400 ] );
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Returns a callback to modify the cURL configuration before the request is executed.
|
|
*
|
|
* @since 1.22.1
|
|
*
|
|
* @param string $url URL.
|
|
* @param string $url_or_ip URL or IP address.
|
|
*/
|
|
public function get_curl_resolve_callback( string $url, string $url_or_ip ): callable {
|
|
/**
|
|
* CURL configuration callback.
|
|
*
|
|
* @param resource $handle The cURL handle returned by curl_init() (passed by reference).
|
|
*/
|
|
return static function ( $handle ) use ( $url, $url_or_ip ): void {
|
|
// Just some safeguard in case cURL is not really available,
|
|
// despite this method being run in the context of WP_Http_Curl.
|
|
if ( ! \function_exists( '\curl_setopt' ) ) {
|
|
return;
|
|
}
|
|
|
|
if ( $url === $url_or_ip ) {
|
|
return;
|
|
}
|
|
|
|
$host = wp_parse_url( $url, PHP_URL_HOST );
|
|
$scheme = wp_parse_url( $url, PHP_URL_SCHEME ) ?? 'http';
|
|
$port = wp_parse_url( $url, PHP_URL_PORT ) ?? 'http' === $scheme ? 80 : 443;
|
|
|
|
// phpcs:disable WordPress.WP.AlternativeFunctions.curl_curl_setopt
|
|
|
|
curl_setopt(
|
|
$handle,
|
|
CURLOPT_RESOLVE,
|
|
[
|
|
"$host:$port:$url_or_ip",
|
|
]
|
|
);
|
|
|
|
// phpcs:enable WordPress.WP.AlternativeFunctions.curl_curl_setopt
|
|
};
|
|
}
|
|
|
|
/**
|
|
* Modifies the cURL configuration before the request is executed.
|
|
*
|
|
* @since 1.15.0
|
|
*
|
|
* @param resource $handle The cURL handle returned by {@see curl_init()} (passed by reference).
|
|
*/
|
|
public function modify_curl_configuration( $handle ): void {
|
|
// Just some safeguard in case cURL is not really available,
|
|
// despite this method being run in the context of WP_Http_Curl.
|
|
if ( ! \function_exists( '\curl_setopt' ) ) {
|
|
return;
|
|
}
|
|
|
|
// phpcs:disable WordPress.WP.AlternativeFunctions.curl_curl_setopt
|
|
|
|
curl_setopt(
|
|
$handle,
|
|
CURLOPT_FILE,
|
|
$this->stream_handle
|
|
);
|
|
|
|
curl_setopt( $handle, CURLOPT_HEADERFUNCTION, [ $this, 'stream_headers' ] );
|
|
|
|
// phpcs:enable WordPress.WP.AlternativeFunctions.curl_curl_setopt
|
|
}
|
|
|
|
/**
|
|
* Grabs the headers of the cURL request.
|
|
*
|
|
* Each header is sent individually to this callback,
|
|
* so we take a look at each one to see if we should "forward" it.
|
|
*
|
|
* @since 1.15.0
|
|
*
|
|
* @param resource $handle cURL handle.
|
|
* @param string $header cURL header.
|
|
* @return int Header length.
|
|
*/
|
|
public function stream_headers( $handle, $header ): int {
|
|
// Parse Status-Line, the first component in the HTTP response, e.g. HTTP/1.1 200 OK.
|
|
// Extract the status code to re-send that here.
|
|
if ( str_starts_with( $header, 'HTTP/' ) ) {
|
|
$status = explode( ' ', $header );
|
|
http_response_code( (int) $status[1] );
|
|
return \strlen( $header );
|
|
}
|
|
|
|
foreach ( self::PROXY_HEADERS_ALLOWLIST as $_header ) {
|
|
if ( str_starts_with( strtolower( $header ), strtolower( $_header ) . ': ' ) ) {
|
|
header( $header, true );
|
|
}
|
|
}
|
|
|
|
return \strlen( $header );
|
|
}
|
|
|
|
/**
|
|
* Proxy a given URL via a PHP read-write stream.
|
|
*
|
|
* @since 1.15.0
|
|
*
|
|
* @param string $url Request URL.
|
|
* @param array<string, mixed> $args Request args.
|
|
*
|
|
* @phpstan-param array{
|
|
* method?: string,
|
|
* timeout?: float,
|
|
* redirection?: int,
|
|
* httpversion?: string,
|
|
* user-agent?: string,
|
|
* reject_unsafe_urls?: bool,
|
|
* blocking?: bool,
|
|
* headers?: string|array,
|
|
* cookies?: array,
|
|
* body?: string|array,
|
|
* compress?: bool,
|
|
* decompress?: bool,
|
|
* sslverify?: bool,
|
|
* sslcertificates?: string,
|
|
* stream?: bool,
|
|
* filename?: string,
|
|
* limit_response_size?: int,
|
|
* } $args
|
|
*/
|
|
private function proxy_url_curl( string $url, array $args ): void {
|
|
add_action( 'http_api_curl', [ $this, 'modify_curl_configuration' ] );
|
|
wp_safe_remote_get( $url, $args );
|
|
remove_action( 'http_api_curl', [ $this, 'modify_curl_configuration' ] );
|
|
|
|
rewind( $this->stream_handle );
|
|
while ( ! feof( $this->stream_handle ) ) {
|
|
echo fread( $this->stream_handle, 1024 * 1024 ); // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped, WordPress.WP.AlternativeFunctions.file_system_operations_fread
|
|
}
|
|
|
|
fclose( $this->stream_handle );
|
|
}
|
|
|
|
/**
|
|
* Proxy a given URL by storing in memory.
|
|
*
|
|
* @since 1.15.0
|
|
*
|
|
* @param string $url Request URL.
|
|
* @param array<string, mixed> $args Request args.
|
|
*
|
|
* @phpstan-param array{
|
|
* method?: string,
|
|
* timeout?: float,
|
|
* redirection?: int,
|
|
* httpversion?: string,
|
|
* user-agent?: string,
|
|
* reject_unsafe_urls?: bool,
|
|
* blocking?: bool,
|
|
* headers?: string|array,
|
|
* cookies?: array,
|
|
* body?: string|array,
|
|
* compress?: bool,
|
|
* decompress?: bool,
|
|
* sslverify?: bool,
|
|
* sslcertificates?: string,
|
|
* stream?: bool,
|
|
* filename?: string,
|
|
* limit_response_size?: int,
|
|
* } $args
|
|
*/
|
|
private function proxy_url_fallback( string $url, array $args ): void {
|
|
$response = wp_safe_remote_get( $url, $args );
|
|
$status = wp_remote_retrieve_response_code( $response );
|
|
|
|
if ( ! $status ) {
|
|
http_response_code( 404 );
|
|
return;
|
|
}
|
|
|
|
http_response_code( (int) $status );
|
|
|
|
$headers = wp_remote_retrieve_headers( $response );
|
|
|
|
foreach ( self::PROXY_HEADERS_ALLOWLIST as $_header ) {
|
|
if ( isset( $headers[ $_header ] ) ) {
|
|
header( $_header . ': ' . $headers[ $_header ] );
|
|
}
|
|
}
|
|
|
|
echo wp_remote_retrieve_body( $response ); // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped
|
|
}
|
|
|
|
/**
|
|
* Validate a URL for safe use in the HTTP API.
|
|
*
|
|
* Like {@see wp_http_validate_url} in core, but with extra hardening
|
|
* to avoid DNS rebinding issues.
|
|
*
|
|
* @SuppressWarnings(PHPMD.NPathComplexity)
|
|
* @SuppressWarnings(PHPMD.CyclomaticComplexity)
|
|
*
|
|
* @since 1.22.0
|
|
*
|
|
* @param string $url Request URL.
|
|
* @return string|false Original URL, resolved IP address, or false on failure.
|
|
*/
|
|
private function validate_url( string $url ) { // phpcs:ignore SlevomatCodingStandard.Complexity.Cognitive.ComplexityTooHigh
|
|
if ( '' === $url || is_numeric( $url ) ) {
|
|
return false;
|
|
}
|
|
|
|
$original_url = $url;
|
|
$url = wp_kses_bad_protocol( $url, [ 'http', 'https' ] );
|
|
if ( ! $url || strtolower( $url ) !== strtolower( $original_url ) ) {
|
|
return false;
|
|
}
|
|
|
|
$parsed_url = wp_parse_url( $url );
|
|
if ( ! $parsed_url || ! isset( $parsed_url['host'], $parsed_url['scheme'] ) ) {
|
|
return false;
|
|
}
|
|
|
|
if ( isset( $parsed_url['user'] ) || isset( $parsed_url['pass'] ) ) {
|
|
return false;
|
|
}
|
|
|
|
if ( false !== strpbrk( $parsed_url['host'], ':#?[]' ) ) {
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Home URL.
|
|
*
|
|
* @var string
|
|
*/
|
|
$home_url = get_option( 'home' );
|
|
|
|
$parsed_home = wp_parse_url( $home_url );
|
|
|
|
if ( ! $parsed_home ) {
|
|
return false;
|
|
}
|
|
|
|
$same_host = isset( $parsed_home['host'] ) && strtolower( $parsed_home['host'] ) === strtolower( $parsed_url['host'] );
|
|
$host = trim( $parsed_url['host'], '.' );
|
|
|
|
$validated_url = $url;
|
|
|
|
if ( ! $same_host ) {
|
|
if ( preg_match( '#^(([1-9]?\d|1\d\d|25[0-5]|2[0-4]\d)\.){3}([1-9]?\d|1\d\d|25[0-5]|2[0-4]\d)$#', $host ) ) {
|
|
$ip = $host;
|
|
} else {
|
|
$ip = gethostbyname( $host );
|
|
if ( $ip === $host ) { // Error condition for gethostbyname().
|
|
return false;
|
|
}
|
|
}
|
|
|
|
$parts = array_map( 'intval', explode( '.', $ip ) );
|
|
if (
|
|
0 === $parts[0] // 0.0.0.0/8.
|
|
||
|
|
127 === $parts[0] // 127.0.0.0/8.
|
|
||
|
|
10 === $parts[0] // 10.0.0.0/8.
|
|
||
|
|
( 172 === $parts[0] && 16 <= $parts[1] && 31 >= $parts[1] ) // 172.16.0.0/12.
|
|
||
|
|
( 192 === $parts[0] && 168 === $parts[1] ) // 192.168.0.0/16.
|
|
||
|
|
( 169 === $parts[0] && 254 === $parts[1] ) // 169.254.0.0/16.
|
|
||
|
|
// phpcs:ignore Squiz.PHP.CommentedOutCode.Found
|
|
( 100 === $parts[0] && 64 <= $parts[1] && 127 >= $parts[1] ) // Private: 100.64.0.0/10.
|
|
) {
|
|
// If host appears local, reject.
|
|
return false;
|
|
}
|
|
|
|
// Use resolved IP address to avoid DNS rebinding issues.
|
|
$validated_url = $ip;
|
|
}
|
|
|
|
/** This filter is documented in wp-includes/http.php */
|
|
$allowed_ports = apply_filters( 'http_allowed_safe_ports', [ 80, 443, 8080 ], $host, $url );
|
|
if (
|
|
! isset( $parsed_url['port'] ) ||
|
|
( \is_array( $allowed_ports ) && \in_array( $parsed_url['port'], $allowed_ports, true ) )
|
|
) {
|
|
return $validated_url;
|
|
}
|
|
|
|
if ( $same_host && isset( $parsed_home['port'] ) && $parsed_home['port'] === $parsed_url['port'] ) {
|
|
return $validated_url;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Returns a list of allowed mime types per media type (image, audio, video).
|
|
*
|
|
* @since 1.19.0
|
|
*
|
|
* @return array<string, string[]> List of allowed mime types.
|
|
*/
|
|
protected function get_allowed_mime_types(): array {
|
|
$mime_type = $this->types->get_allowed_mime_types();
|
|
|
|
// Do not support hotlinking SVGs for security reasons.
|
|
unset( $mime_type['vector'] );
|
|
|
|
return $mime_type;
|
|
}
|
|
}
|