You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
586 lines
15 KiB
PHP
586 lines
15 KiB
PHP
<?php
|
|
/**
|
|
* Class Embed_Controller
|
|
*
|
|
* @link https://github.com/googleforcreators/web-stories-wp
|
|
*
|
|
* @copyright 2020 Google LLC
|
|
* @license https://www.apache.org/licenses/LICENSE-2.0 Apache License 2.0
|
|
*/
|
|
|
|
/**
|
|
* Copyright 2020 Google LLC
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* https://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
declare(strict_types = 1);
|
|
|
|
namespace Google\Web_Stories\REST_API;
|
|
|
|
use DOMElement;
|
|
use DOMNode;
|
|
use DOMNodeList;
|
|
use Google\Web_Stories\Infrastructure\HasRequirements;
|
|
use Google\Web_Stories\Story_Post_Type;
|
|
use Google\Web_Stories_Dependencies\AmpProject\Dom\Document;
|
|
use WP_Error;
|
|
use WP_Http;
|
|
use WP_Network;
|
|
use WP_Post;
|
|
use WP_REST_Request;
|
|
use WP_REST_Response;
|
|
use WP_REST_Server;
|
|
|
|
/**
|
|
* Embed controller class.
|
|
*
|
|
* API endpoint to facilitate embedding web stories.
|
|
*
|
|
* @SuppressWarnings(PHPMD.ExcessiveClassComplexity)
|
|
*
|
|
* @phpstan-type SchemaEntry array{
|
|
* description: string,
|
|
* type: string,
|
|
* context: string[],
|
|
* default?: mixed,
|
|
* }
|
|
*
|
|
* @phpstan-type Schema array{
|
|
* properties: array<string, SchemaEntry>
|
|
* }
|
|
*/
|
|
class Embed_Controller extends REST_Controller implements HasRequirements {
|
|
|
|
/**
|
|
* Story_Post_Type instance.
|
|
*
|
|
* @var Story_Post_Type Story_Post_Type instance.
|
|
*/
|
|
private Story_Post_Type $story_post_type;
|
|
|
|
/**
|
|
* Constructor.
|
|
*
|
|
* @param Story_Post_Type $story_post_type Story_Post_Type instance.
|
|
*/
|
|
public function __construct( Story_Post_Type $story_post_type ) {
|
|
$this->story_post_type = $story_post_type;
|
|
|
|
$this->namespace = 'web-stories/v1';
|
|
$this->rest_base = 'embed';
|
|
}
|
|
|
|
/**
|
|
* Get the list of service IDs required for this service to be registered.
|
|
*
|
|
* Needed because the story post type needs to be registered first.
|
|
*
|
|
* @since 1.13.0
|
|
*
|
|
* @return string[] List of required services.
|
|
*/
|
|
public static function get_requirements(): array {
|
|
return [ 'story_post_type' ];
|
|
}
|
|
|
|
/**
|
|
* Registers routes for links.
|
|
*
|
|
* @see register_rest_route()
|
|
*/
|
|
public function register_routes(): void {
|
|
register_rest_route(
|
|
$this->namespace,
|
|
'/' . $this->rest_base,
|
|
[
|
|
[
|
|
'methods' => WP_REST_Server::READABLE,
|
|
'callback' => [ $this, 'get_proxy_item' ],
|
|
'permission_callback' => [ $this, 'get_proxy_item_permissions_check' ],
|
|
'args' => [
|
|
'url' => [
|
|
'description' => __( 'The URL for which to fetch embed data.', 'web-stories' ),
|
|
'required' => true,
|
|
'type' => 'string',
|
|
'format' => 'uri',
|
|
],
|
|
],
|
|
],
|
|
]
|
|
);
|
|
}
|
|
|
|
/**
|
|
* Callback for the Web Stories embed endpoints.
|
|
*
|
|
* Returns information about the given story.
|
|
*
|
|
* @SuppressWarnings(PHPMD.ExcessiveMethodLength)
|
|
*
|
|
* @since 1.0.0
|
|
*
|
|
* @param WP_REST_Request $request Full data about the request.
|
|
* @return WP_REST_Response|WP_Error Response object on success, or WP_Error object on failure.
|
|
*/
|
|
public function get_proxy_item( $request ) {
|
|
/**
|
|
* Requested URL.
|
|
*
|
|
* @var string $url
|
|
*/
|
|
$url = $request['url'];
|
|
$url = urldecode( untrailingslashit( $url ) );
|
|
|
|
if ( empty( $url ) ) {
|
|
return new \WP_Error( 'rest_invalid_url', __( 'Invalid URL', 'web-stories' ), [ 'status' => 404 ] );
|
|
}
|
|
|
|
/**
|
|
* Filters the link data TTL value.
|
|
*
|
|
* @since 1.0.0
|
|
*
|
|
* @param int $time Time to live (in seconds). Default is 1 day.
|
|
* @param string $url The attempted URL.
|
|
*/
|
|
$cache_ttl = apply_filters( 'web_stories_embed_data_cache_ttl', DAY_IN_SECONDS, $url );
|
|
$cache_key = 'web_stories_embed_data_' . md5( $url );
|
|
|
|
$data = get_transient( $cache_key );
|
|
|
|
if ( \is_string( $data ) && ! empty( $data ) ) {
|
|
/**
|
|
* Decoded cached embed data.
|
|
*
|
|
* @var array<string,mixed>|null $embed
|
|
*/
|
|
$embed = json_decode( $data, true );
|
|
|
|
if ( $embed ) {
|
|
$response = $this->prepare_item_for_response( $embed, $request );
|
|
return rest_ensure_response( $response );
|
|
}
|
|
}
|
|
|
|
$data = $this->get_data_from_post( $url );
|
|
if ( $data ) {
|
|
$response = $this->prepare_item_for_response( $data, $request );
|
|
|
|
return rest_ensure_response( $response );
|
|
}
|
|
|
|
$args = [
|
|
'limit_response_size' => 153_600, // 150 KB.
|
|
'timeout' => 7, // phpcs:ignore WordPressVIPMinimum.Performance.RemoteRequestTimeout.timeout_timeout
|
|
];
|
|
|
|
/**
|
|
* Filters the HTTP request args for link data retrieval.
|
|
*
|
|
* Can be used to adjust timeout and response size limit.
|
|
*
|
|
* @since 1.0.0
|
|
*
|
|
* @param array<string,mixed> $args Arguments used for the HTTP request
|
|
* @param string $url The attempted URL.
|
|
*
|
|
* @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
|
|
*/
|
|
$args = apply_filters( 'web_stories_embed_data_request_args', $args, $url );
|
|
|
|
$response = wp_safe_remote_get( $url, $args );
|
|
|
|
if ( WP_Http::OK !== wp_remote_retrieve_response_code( $response ) ) {
|
|
// Not saving the error response to cache since the error might be temporary.
|
|
return new \WP_Error( 'rest_invalid_url', __( 'Invalid URL', 'web-stories' ), [ 'status' => 404 ] );
|
|
}
|
|
|
|
$html = wp_remote_retrieve_body( $response );
|
|
|
|
if ( ! $html ) {
|
|
return new \WP_Error( 'rest_invalid_story', __( 'URL is not a story', 'web-stories' ), [ 'status' => 404 ] );
|
|
}
|
|
|
|
$data = $this->get_data_from_document( $html );
|
|
|
|
if ( ! $data ) {
|
|
return new \WP_Error( 'rest_invalid_story', __( 'URL is not a story', 'web-stories' ), [ 'status' => 404 ] );
|
|
}
|
|
|
|
$response = $this->prepare_item_for_response( $data, $request );
|
|
|
|
set_transient( $cache_key, wp_json_encode( $data ), $cache_ttl );
|
|
|
|
return rest_ensure_response( $response );
|
|
}
|
|
|
|
/**
|
|
* Prepares a single embed output for response.
|
|
*
|
|
* @since 1.10.0
|
|
*
|
|
* @param array<string, mixed>|false $embed Embed value, default to false is not set.
|
|
* @param WP_REST_Request $request Request object.
|
|
* @return WP_REST_Response|WP_Error Response object.
|
|
*/
|
|
public function prepare_item_for_response( $embed, $request ) {
|
|
$fields = $this->get_fields_for_response( $request );
|
|
$schema = $this->get_item_schema();
|
|
|
|
$data = [];
|
|
|
|
if ( \is_array( $embed ) ) {
|
|
$check_fields = array_keys( $embed );
|
|
foreach ( $check_fields as $check_field ) {
|
|
if ( ! empty( $schema['properties'][ $check_field ] ) && rest_is_field_included( $check_field, $fields ) ) {
|
|
$data[ $check_field ] = rest_sanitize_value_from_schema( $embed[ $check_field ], $schema['properties'][ $check_field ] );
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Request context.
|
|
*
|
|
* @var string $context
|
|
*/
|
|
$context = ! empty( $request['context'] ) ? $request['context'] : 'view';
|
|
$data = $this->add_additional_fields_to_object( $data, $request );
|
|
$data = $this->filter_response_by_context( $data, $context );
|
|
|
|
return rest_ensure_response( $data );
|
|
}
|
|
|
|
|
|
/**
|
|
* Retrieves the link's schema, conforming to JSON Schema.
|
|
*
|
|
* @since 1.10.0
|
|
*
|
|
* @return array Item schema data.
|
|
*
|
|
* @phpstan-return Schema
|
|
*/
|
|
public function get_item_schema(): array {
|
|
if ( $this->schema ) {
|
|
/**
|
|
* Schema.
|
|
*
|
|
* @phpstan-var Schema $schema
|
|
*/
|
|
$schema = $this->add_additional_fields_schema( $this->schema );
|
|
return $schema;
|
|
}
|
|
|
|
$schema = [
|
|
'$schema' => 'http://json-schema.org/draft-04/schema#',
|
|
'title' => 'embed',
|
|
'type' => 'object',
|
|
'properties' => [
|
|
'title' => [
|
|
'description' => __( 'Embed\'s title', 'web-stories' ),
|
|
'type' => 'string',
|
|
'context' => [ 'view', 'edit', 'embed' ],
|
|
],
|
|
'poster' => [
|
|
'description' => __( 'Embed\'s image', 'web-stories' ),
|
|
'type' => 'string',
|
|
'format' => 'uri',
|
|
'context' => [ 'view', 'edit', 'embed' ],
|
|
],
|
|
],
|
|
];
|
|
|
|
$this->schema = $schema;
|
|
|
|
/**
|
|
* Schema.
|
|
*
|
|
* @phpstan-var Schema $schema
|
|
*/
|
|
$schema = $this->add_additional_fields_schema( $this->schema );
|
|
return $schema;
|
|
}
|
|
|
|
/**
|
|
* Checks if current user can process links.
|
|
*
|
|
* @since 1.0.0
|
|
*
|
|
* @return true|WP_Error True if the request has read access, WP_Error object otherwise.
|
|
*/
|
|
public function get_proxy_item_permissions_check() {
|
|
if ( ! $this->story_post_type->has_cap( 'edit_posts' ) ) {
|
|
return new \WP_Error( 'rest_forbidden', __( 'Sorry, you are not allowed to make proxied embed requests.', 'web-stories' ), [ 'status' => rest_authorization_required_code() ] );
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Retrieves the story metadata for a given URL on the current site.
|
|
*
|
|
* @since 1.0.0
|
|
*
|
|
* @param string $url The URL that should be inspected for metadata.
|
|
* @return array{title: string, poster: string}|false Story metadata if the URL does belong to the current site. False otherwise.
|
|
*/
|
|
private function get_data_from_post( string $url ) {
|
|
$post = $this->url_to_post( $url );
|
|
|
|
if ( ! $post || $this->story_post_type->get_slug() !== $post->post_type ) {
|
|
return false;
|
|
}
|
|
|
|
return $this->get_data_from_document( $post->post_content );
|
|
}
|
|
|
|
/**
|
|
* Examines a URL and try to determine the post it represents.
|
|
*
|
|
* Checks are supposedly from the hosted site blog.
|
|
*
|
|
* @SuppressWarnings(PHPMD.NPathComplexity)
|
|
*
|
|
* @since 1.2.0
|
|
*
|
|
* @see get_oembed_response_data_for_url
|
|
* @see url_to_postid
|
|
*
|
|
* @param string $url Permalink to check.
|
|
* @return WP_Post|null Post object on success, null otherwise.
|
|
*/
|
|
private function url_to_post( $url ): ?WP_Post {
|
|
$post = null;
|
|
$switched_blog = $this->maybe_switch_site( $url );
|
|
|
|
|
|
if ( \function_exists( 'wpcom_vip_url_to_postid' ) ) {
|
|
$post_id = wpcom_vip_url_to_postid( $url );
|
|
} else {
|
|
// phpcs:ignore WordPressVIPMinimum.Functions.RestrictedFunctions
|
|
$post_id = url_to_postid( $url );
|
|
}
|
|
|
|
if ( $post_id ) {
|
|
$post = get_post( $post_id );
|
|
}
|
|
|
|
if ( ! $post_id ) {
|
|
// url_to_postid() does not recognize plain permalinks like https://example.com/?web-story=my-story.
|
|
// Let's check for that ourselves.
|
|
|
|
/**
|
|
* The URL's hostname.
|
|
*
|
|
* @var string|false|null $url_host
|
|
*/
|
|
$url_host = wp_parse_url( $url, PHP_URL_HOST );
|
|
if ( $url_host ) {
|
|
$url_host = str_replace( 'www.', '', $url_host );
|
|
}
|
|
|
|
/**
|
|
* The home URL's hostname.
|
|
*
|
|
* @var string|false|null $home_url_host
|
|
*/
|
|
$home_url_host = wp_parse_url( home_url(), PHP_URL_HOST );
|
|
if ( $home_url_host ) {
|
|
$home_url_host = str_replace( 'www.', '', $home_url_host );
|
|
}
|
|
|
|
if ( $url_host && $home_url_host && $url_host === $home_url_host ) {
|
|
$values = [];
|
|
if (
|
|
preg_match(
|
|
'#[?&](' . preg_quote( $this->story_post_type->get_slug(), '#' ) . ')=([^&]+)#',
|
|
$url,
|
|
$values
|
|
)
|
|
) {
|
|
$slug = $values[2];
|
|
|
|
if ( \function_exists( 'wpcom_vip_get_page_by_path' ) ) {
|
|
$post = wpcom_vip_get_page_by_path( $slug, OBJECT, $this->story_post_type->get_slug() );
|
|
} else {
|
|
// phpcs:ignore WordPressVIPMinimum.Functions.RestrictedFunctions
|
|
$post = get_page_by_path( $slug, OBJECT, $this->story_post_type->get_slug() );
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if ( $switched_blog ) {
|
|
restore_current_blog();
|
|
}
|
|
|
|
if ( ! $post instanceof WP_Post ) {
|
|
return null;
|
|
}
|
|
|
|
return $post;
|
|
}
|
|
|
|
/**
|
|
* Maybe switch to site.
|
|
*
|
|
* @since 1.29.0
|
|
*
|
|
* @param string $url Permalink to check.
|
|
*/
|
|
private function maybe_switch_site( $url ): bool {
|
|
if ( ! is_multisite() ) {
|
|
return false;
|
|
}
|
|
$switched_blog = false;
|
|
|
|
/**
|
|
* URL parts.
|
|
*
|
|
* @var array<string, string>|false $url_parts
|
|
*/
|
|
$url_parts = wp_parse_url( $url );
|
|
if ( ! $url_parts ) {
|
|
$url_parts = [];
|
|
}
|
|
|
|
$url_parts = wp_parse_args(
|
|
$url_parts,
|
|
[
|
|
'host' => '',
|
|
'path' => '/',
|
|
]
|
|
);
|
|
|
|
$qv = [
|
|
'domain' => $url_parts['host'],
|
|
'path' => '/',
|
|
'number' => 1,
|
|
'update_site_cache' => false,
|
|
'update_site_meta_cache' => false,
|
|
];
|
|
|
|
// In case of subdirectory configs, set the path.
|
|
if ( ! is_subdomain_install() ) {
|
|
// Get "sub-site" part of "http://example.org/sub-site/web-stories/my-story/".
|
|
// But given just "http://example.org/web-stories/my-story/", don't treat "web-stories" as site path.
|
|
// This differs from the logic in get_oembed_response_data_for_url() which does not do this.
|
|
// TODO: Investigate possible core bug in get_oembed_response_data_for_url()?
|
|
$path = explode( '/', ltrim( $url_parts['path'], '/' ) );
|
|
$path = \count( $path ) > 2 ? reset( $path ) : false;
|
|
$network = get_network();
|
|
if ( $path && $network instanceof WP_Network ) {
|
|
$qv['path'] = $network->path . $path . '/';
|
|
}
|
|
}
|
|
|
|
$sites = (array) get_sites( $qv );
|
|
$site = reset( $sites );
|
|
|
|
if ( $site && get_current_blog_id() !== (int) $site->blog_id ) {
|
|
// phpcs:ignore WordPressVIPMinimum.Functions.RestrictedFunctions.switch_to_blog_switch_to_blog
|
|
switch_to_blog( (int) $site->blog_id );
|
|
|
|
$switched_blog = true;
|
|
}
|
|
|
|
return $switched_blog;
|
|
}
|
|
|
|
/**
|
|
* Parses an HTML document to and returns the story's title and poster.
|
|
*
|
|
* @since 1.0.0
|
|
*
|
|
* @param string $html HTML document markup.
|
|
* @return array{title: string, poster: string}|false Response data or false if document is not a story.
|
|
*/
|
|
private function get_data_from_document( string $html ) {
|
|
try {
|
|
$doc = Document::fromHtml( $html );
|
|
} catch ( \DOMException $exception ) {
|
|
return false;
|
|
}
|
|
|
|
if ( ! $doc ) {
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* List of <amp-story> elements.
|
|
*
|
|
* @var DOMNodeList<DOMElement>|false $amp_story
|
|
*/
|
|
$amp_story = $doc->xpath->query( '//amp-story' );
|
|
|
|
if ( ! $amp_story instanceof DOMNodeList || 0 === $amp_story->length ) {
|
|
return false;
|
|
}
|
|
|
|
$title = $this->get_dom_attribute_content( $amp_story, 'title' );
|
|
$poster = $this->get_dom_attribute_content( $amp_story, 'poster-portrait-src' );
|
|
|
|
return [
|
|
'title' => $title ?: '',
|
|
'poster' => $poster ?: '',
|
|
];
|
|
}
|
|
|
|
/**
|
|
* Retrieve content of a given DOM node attribute.
|
|
*
|
|
* @since 1.0.0
|
|
*
|
|
* @param DOMNodeList<DOMElement>|false $query XPath query result.
|
|
* @param string $attribute Attribute name.
|
|
* @return string|false Attribute content on success, false otherwise.
|
|
*/
|
|
protected function get_dom_attribute_content( $query, string $attribute ) {
|
|
if ( ! $query instanceof DOMNodeList || 0 === $query->length ) {
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* DOMElement
|
|
*
|
|
* @var DOMElement|DOMNode $node
|
|
*/
|
|
$node = $query->item( 0 );
|
|
|
|
if ( ! $node instanceof DOMElement ) {
|
|
return false;
|
|
}
|
|
|
|
return $node->getAttribute( $attribute );
|
|
}
|
|
}
|