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|
<?php
defined( 'WPCOM_JSON_API__DEBUG' ) or define( 'WPCOM_JSON_API__DEBUG', false );
require_once dirname( __FILE__ ) . '/sal/class.json-api-platform.php';
class WPCOM_JSON_API {
static $self = null;
public $endpoints = array();
public $token_details = array();
public $method = '';
public $url = '';
public $path = '';
public $version = null;
public $query = array();
public $post_body = null;
public $files = null;
public $content_type = null;
public $accept = '';
public $_server_https;
public $exit = true;
public $public_api_scheme = 'https';
public $output_status_code = 200;
public $trapped_error = null;
public $did_output = false;
public $extra_headers = array();
/**
* @return WPCOM_JSON_API instance
*/
static function init( $method = null, $url = null, $post_body = null ) {
if ( !self::$self ) {
$class = function_exists( 'get_called_class' ) ? get_called_class() : __CLASS__; // phpcs:ignore PHPCompatibility.PHP.NewFunctions.get_called_classFound
self::$self = new $class( $method, $url, $post_body );
}
return self::$self;
}
function add( WPCOM_JSON_API_Endpoint $endpoint ) {
$path_versions = serialize( array (
$endpoint->path,
$endpoint->min_version,
$endpoint->max_version,
) );
if ( !isset( $this->endpoints[$path_versions] ) ) {
$this->endpoints[$path_versions] = array();
}
$this->endpoints[$path_versions][$endpoint->method] = $endpoint;
}
static function is_truthy( $value ) {
switch ( strtolower( (string) $value ) ) {
case '1' :
case 't' :
case 'true' :
return true;
}
return false;
}
static function is_falsy( $value ) {
switch ( strtolower( (string) $value ) ) {
case '0' :
case 'f' :
case 'false' :
return true;
}
return false;
}
function __construct() {
$args = func_get_args();
call_user_func_array( array( $this, 'setup_inputs' ), $args );
}
function setup_inputs( $method = null, $url = null, $post_body = null ) {
if ( is_null( $method ) ) {
$this->method = strtoupper( $_SERVER['REQUEST_METHOD'] );
} else {
$this->method = strtoupper( $method );
}
if ( is_null( $url ) ) {
$this->url = set_url_scheme( 'http://' . $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI'] );
} else {
$this->url = $url;
}
$parsed = parse_url( $this->url );
$this->path = $parsed['path'];
if ( !empty( $parsed['query'] ) ) {
wp_parse_str( $parsed['query'], $this->query );
}
if ( isset( $_SERVER['HTTP_ACCEPT'] ) && $_SERVER['HTTP_ACCEPT'] ) {
$this->accept = $_SERVER['HTTP_ACCEPT'];
}
if ( 'POST' === $this->method ) {
if ( is_null( $post_body ) ) {
$this->post_body = file_get_contents( 'php://input' );
if ( isset( $_SERVER['HTTP_CONTENT_TYPE'] ) && $_SERVER['HTTP_CONTENT_TYPE'] ) {
$this->content_type = $_SERVER['HTTP_CONTENT_TYPE'];
} elseif ( isset( $_SERVER['CONTENT_TYPE'] ) && $_SERVER['CONTENT_TYPE'] ) {
$this->content_type = $_SERVER['CONTENT_TYPE'] ;
} elseif ( '{' === $this->post_body[0] ) {
$this->content_type = 'application/json';
} else {
$this->content_type = 'application/x-www-form-urlencoded';
}
if ( 0 === strpos( strtolower( $this->content_type ), 'multipart/' ) ) {
$this->post_body = http_build_query( stripslashes_deep( $_POST ) );
$this->files = $_FILES;
$this->content_type = 'multipart/form-data';
}
} else {
$this->post_body = $post_body;
$this->content_type = '{' === isset( $this->post_body[0] ) && $this->post_body[0] ? 'application/json' : 'application/x-www-form-urlencoded';
}
} else {
$this->post_body = null;
$this->content_type = null;
}
$this->_server_https = array_key_exists( 'HTTPS', $_SERVER ) ? $_SERVER['HTTPS'] : '--UNset--';
}
function initialize() {
$this->token_details['blog_id'] = Jetpack_Options::get_option( 'id' );
}
function serve( $exit = true ) {
ini_set( 'display_errors', false );
$this->exit = (bool) $exit;
// This was causing problems with Jetpack, but is necessary for wpcom
// @see https://github.com/Automattic/jetpack/pull/2603
// @see r124548-wpcom
if ( defined( 'IS_WPCOM' ) && IS_WPCOM ) {
add_filter( 'home_url', array( $this, 'ensure_http_scheme_of_home_url' ), 10, 3 );
}
add_filter( 'user_can_richedit', '__return_true' );
add_filter( 'comment_edit_pre', array( $this, 'comment_edit_pre' ) );
$initialization = $this->initialize();
if ( 'OPTIONS' == $this->method ) {
/**
* Fires before the page output.
* Can be used to specify custom header options.
*
* @module json-api
*
* @since 3.1.0
*/
do_action( 'wpcom_json_api_options' );
return $this->output( 200, '', 'text/plain' );
}
if ( is_wp_error( $initialization ) ) {
$this->output_error( $initialization );
return;
}
// Normalize path and extract API version
$this->path = untrailingslashit( $this->path );
preg_match( '#^/rest/v(\d+(\.\d+)*)#', $this->path, $matches );
$this->path = substr( $this->path, strlen( $matches[0] ) );
$this->version = $matches[1];
$allowed_methods = array( 'GET', 'POST' );
$four_oh_five = false;
$is_help = preg_match( '#/help/?$#i', $this->path );
$matching_endpoints = array();
if ( $is_help ) {
$origin = get_http_origin();
if ( !empty( $origin ) && 'GET' == $this->method ) {
header( 'Access-Control-Allow-Origin: ' . esc_url_raw( $origin ) );
}
$this->path = substr( rtrim( $this->path, '/' ), 0, -5 );
// Show help for all matching endpoints regardless of method
$methods = $allowed_methods;
$find_all_matching_endpoints = true;
// How deep to truncate each endpoint's path to see if it matches this help request
$depth = substr_count( $this->path, '/' ) + 1;
if ( false !== stripos( $this->accept, 'javascript' ) || false !== stripos( $this->accept, 'json' ) ) {
$help_content_type = 'json';
} else {
$help_content_type = 'html';
}
} else {
if ( in_array( $this->method, $allowed_methods ) ) {
// Only serve requested method
$methods = array( $this->method );
$find_all_matching_endpoints = false;
} else {
// We don't allow this requested method - find matching endpoints and send 405
$methods = $allowed_methods;
$find_all_matching_endpoints = true;
$four_oh_five = true;
}
}
// Find which endpoint to serve
$found = false;
foreach ( $this->endpoints as $endpoint_path_versions => $endpoints_by_method ) {
$endpoint_path_versions = unserialize( $endpoint_path_versions );
$endpoint_path = $endpoint_path_versions[0];
$endpoint_min_version = $endpoint_path_versions[1];
$endpoint_max_version = $endpoint_path_versions[2];
// Make sure max_version is not less than min_version
if ( version_compare( $endpoint_max_version, $endpoint_min_version, '<' ) ) {
$endpoint_max_version = $endpoint_min_version;
}
foreach ( $methods as $method ) {
if ( !isset( $endpoints_by_method[$method] ) ) {
continue;
}
// Normalize
$endpoint_path = untrailingslashit( $endpoint_path );
if ( $is_help ) {
// Truncate path at help depth
$endpoint_path = join( '/', array_slice( explode( '/', $endpoint_path ), 0, $depth ) );
}
// Generate regular expression from sprintf()
$endpoint_path_regex = str_replace( array( '%s', '%d' ), array( '([^/?&]+)', '(\d+)' ), $endpoint_path );
if ( !preg_match( "#^$endpoint_path_regex\$#", $this->path, $path_pieces ) ) {
// This endpoint does not match the requested path.
continue;
}
if ( version_compare( $this->version, $endpoint_min_version, '<' ) || version_compare( $this->version, $endpoint_max_version, '>' ) ) {
// This endpoint does not match the requested version.
continue;
}
$found = true;
if ( $find_all_matching_endpoints ) {
$matching_endpoints[] = array( $endpoints_by_method[$method], $path_pieces );
} else {
// The method parameters are now in $path_pieces
$endpoint = $endpoints_by_method[$method];
break 2;
}
}
}
if ( !$found ) {
return $this->output( 404, '', 'text/plain' );
}
if ( $four_oh_five ) {
$allowed_methods = array();
foreach ( $matching_endpoints as $matching_endpoint ) {
$allowed_methods[] = $matching_endpoint[0]->method;
}
header( 'Allow: ' . strtoupper( join( ',', array_unique( $allowed_methods ) ) ) );
return $this->output( 405, array( 'error' => 'not_allowed', 'error_message' => 'Method not allowed' ) );
}
if ( $is_help ) {
/**
* Fires before the API output.
*
* @since 1.9.0
*
* @param string help.
*/
do_action( 'wpcom_json_api_output', 'help' );
$proxied = function_exists( 'wpcom_is_proxied_request' ) ? wpcom_is_proxied_request() : false;
if ( 'json' === $help_content_type ) {
$docs = array();
foreach ( $matching_endpoints as $matching_endpoint ) {
if ( $matching_endpoint[0]->is_publicly_documentable() || $proxied || WPCOM_JSON_API__DEBUG )
$docs[] = call_user_func( array( $matching_endpoint[0], 'generate_documentation' ) );
}
return $this->output( 200, $docs );
} else {
status_header( 200 );
foreach ( $matching_endpoints as $matching_endpoint ) {
if ( $matching_endpoint[0]->is_publicly_documentable() || $proxied || WPCOM_JSON_API__DEBUG )
call_user_func( array( $matching_endpoint[0], 'document' ) );
}
}
exit;
}
if ( $endpoint->in_testing && !WPCOM_JSON_API__DEBUG ) {
return $this->output( 404, '', 'text/plain' );
}
/** This action is documented in class.json-api.php */
do_action( 'wpcom_json_api_output', $endpoint->stat );
$response = $this->process_request( $endpoint, $path_pieces );
if ( !$response && !is_array( $response ) ) {
return $this->output( 500, '', 'text/plain' );
} elseif ( is_wp_error( $response ) ) {
return $this->output_error( $response );
}
$output_status_code = $this->output_status_code;
$this->set_output_status_code();
return $this->output( $output_status_code, $response, 'application/json', $this->extra_headers );
}
function process_request( WPCOM_JSON_API_Endpoint $endpoint, $path_pieces ) {
$this->endpoint = $endpoint;
return call_user_func_array( array( $endpoint, 'callback' ), $path_pieces );
}
function output_early( $status_code, $response = null, $content_type = 'application/json' ) {
$exit = $this->exit;
$this->exit = false;
if ( is_wp_error( $response ) )
$this->output_error( $response );
else
$this->output( $status_code, $response, $content_type );
$this->exit = $exit;
if ( ! defined( 'XMLRPC_REQUEST' ) || ! XMLRPC_REQUEST ) {
$this->finish_request();
}
}
function set_output_status_code( $code = 200 ) {
$this->output_status_code = $code;
}
function output( $status_code, $response = null, $content_type = 'application/json', $extra = array() ) {
// In case output() was called before the callback returned
if ( $this->did_output ) {
if ( $this->exit )
exit;
return $content_type;
}
$this->did_output = true;
// 400s and 404s are allowed for all origins
if ( 404 == $status_code || 400 == $status_code )
header( 'Access-Control-Allow-Origin: *' );
if ( is_null( $response ) ) {
$response = new stdClass;
}
if ( 'text/plain' === $content_type ) {
status_header( (int) $status_code );
header( 'Content-Type: text/plain' );
foreach( $extra as $key => $value ) {
header( "$key: $value" );
}
echo $response;
if ( $this->exit ) {
exit;
}
return $content_type;
}
$response = $this->filter_fields( $response );
if ( isset( $this->query['http_envelope'] ) && self::is_truthy( $this->query['http_envelope'] ) ) {
$headers = array(
array(
'name' => 'Content-Type',
'value' => $content_type,
)
);
foreach( $extra as $key => $value ) {
$headers[] = array( 'name' => $key, 'value' => $value );
}
$response = array(
'code' => (int) $status_code,
'headers' => $headers,
'body' => $response,
);
$status_code = 200;
$content_type = 'application/json';
}
status_header( (int) $status_code );
header( "Content-Type: $content_type" );
if ( isset( $this->query['callback'] ) && is_string( $this->query['callback'] ) ) {
$callback = preg_replace( '/[^a-z0-9_.]/i', '', $this->query['callback'] );
} else {
$callback = false;
}
if ( $callback ) {
// Mitigate Rosetta Flash [1] by setting the Content-Type-Options: nosniff header
// and by prepending the JSONP response with a JS comment.
// [1] http://miki.it/blog/2014/7/8/abusing-jsonp-with-rosetta-flash/
echo "/**/$callback(";
}
echo $this->json_encode( $response );
if ( $callback ) {
echo ");";
}
if ( $this->exit ) {
exit;
}
return $content_type;
}
public static function serializable_error ( $error ) {
$status_code = $error->get_error_data();
if ( is_array( $status_code ) ) {
$status_code = $status_code['status_code'];
}
if ( !$status_code ) {
$status_code = 400;
}
$response = array(
'error' => $error->get_error_code(),
'message' => $error->get_error_message(),
);
if ( $additional_data = $error->get_error_data( 'additional_data' ) ) {
$response['data'] = $additional_data;
}
return array(
'status_code' => $status_code,
'errors' => $response
);
}
function output_error( $error ) {
$error_response = $this->serializable_error( $error );
return $this->output( $error_response[ 'status_code'], $error_response['errors'] );
}
function filter_fields( $response ) {
if ( empty( $this->query['fields'] ) || ( is_array( $response ) && ! empty( $response['error'] ) ) || ! empty( $this->endpoint->custom_fields_filtering ) )
return $response;
$fields = array_map( 'trim', explode( ',', $this->query['fields'] ) );
if ( is_object( $response ) ) {
$response = (array) $response;
}
$has_filtered = false;
if ( is_array( $response ) && empty( $response['ID'] ) ) {
$keys_to_filter = array(
'categories',
'comments',
'connections',
'domains',
'groups',
'likes',
'media',
'notes',
'posts',
'services',
'sites',
'suggestions',
'tags',
'themes',
'topics',
'users',
);
foreach ( $keys_to_filter as $key_to_filter ) {
if ( ! isset( $response[ $key_to_filter ] ) || $has_filtered )
continue;
foreach ( $response[ $key_to_filter ] as $key => $values ) {
if ( is_object( $values ) ) {
if ( is_object( $response[ $key_to_filter ] ) ) {
$response[ $key_to_filter ]->$key = (object) array_intersect_key( ( (array) $values ), array_flip( $fields ) );
} elseif ( is_array( $response[ $key_to_filter ] ) ) {
$response[ $key_to_filter ][ $key ] = (object) array_intersect_key( ( (array) $values ), array_flip( $fields ) );
}
} elseif ( is_array( $values ) ) {
$response[ $key_to_filter ][ $key ] = array_intersect_key( $values, array_flip( $fields ) );
}
}
$has_filtered = true;
}
}
if ( ! $has_filtered ) {
if ( is_object( $response ) ) {
$response = (object) array_intersect_key( (array) $response, array_flip( $fields ) );
} else if ( is_array( $response ) ) {
$response = array_intersect_key( $response, array_flip( $fields ) );
}
}
return $response;
}
function ensure_http_scheme_of_home_url( $url, $path, $original_scheme ) {
if ( $original_scheme ) {
return $url;
}
return preg_replace( '#^https:#', 'http:', $url );
}
function comment_edit_pre( $comment_content ) {
return htmlspecialchars_decode( $comment_content, ENT_QUOTES );
}
function json_encode( $data ) {
return json_encode( $data );
}
function ends_with( $haystack, $needle ) {
return $needle === substr( $haystack, -strlen( $needle ) );
}
// Returns the site's blog_id in the WP.com ecosystem
function get_blog_id_for_output() {
return $this->token_details['blog_id'];
}
// Returns the site's local blog_id
function get_blog_id( $blog_id ) {
return $GLOBALS['blog_id'];
}
function switch_to_blog_and_validate_user( $blog_id = 0, $verify_token_for_blog = true ) {
if ( $this->is_restricted_blog( $blog_id ) ) {
return new WP_Error( 'unauthorized', 'User cannot access this restricted blog', 403 );
}
if ( -1 == get_option( 'blog_public' ) && !current_user_can( 'read' ) ) {
return new WP_Error( 'unauthorized', 'User cannot access this private blog.', 403 );
}
return $blog_id;
}
// Returns true if the specified blog ID is a restricted blog
function is_restricted_blog( $blog_id ) {
/**
* Filters all REST API access and return a 403 unauthorized response for all Restricted blog IDs.
*
* @module json-api
*
* @since 3.4.0
*
* @param array $array Array of Blog IDs.
*/
$restricted_blog_ids = apply_filters( 'wpcom_json_api_restricted_blog_ids', array() );
return true === in_array( $blog_id, $restricted_blog_ids );
}
function post_like_count( $blog_id, $post_id ) {
return 0;
}
function is_liked( $blog_id, $post_id ) {
return false;
}
function is_reblogged( $blog_id, $post_id ) {
return false;
}
function is_following( $blog_id ) {
return false;
}
function add_global_ID( $blog_id, $post_id ) {
return '';
}
function get_avatar_url( $email, $avatar_size = null ) {
if ( function_exists( 'wpcom_get_avatar_url' ) ) {
return null === $avatar_size
? wpcom_get_avatar_url( $email )
: wpcom_get_avatar_url( $email, $avatar_size );
} else {
return null === $avatar_size
? get_avatar_url( $email )
: get_avatar_url( $email, $avatar_size );
}
}
/**
* Counts the number of comments on a site, excluding certain comment types.
*
* @param $post_id int Post ID.
* @return array Array of counts, matching the output of https://developer.wordpress.org/reference/functions/get_comment_count/.
*/
public function wp_count_comments( $post_id ) {
global $wpdb;
if ( 0 !== $post_id ) {
return wp_count_comments( $post_id );
}
$counts = array(
'total_comments' => 0,
'all' => 0,
);
/**
* Exclude certain comment types from comment counts in the REST API.
*
* @since 6.9.0
* @module json-api
*
* @param array Array of comment types to exclude (default: 'order_note', 'webhook_delivery', 'review', 'action_log')
*/
$exclude = apply_filters( 'jetpack_api_exclude_comment_types_count',
array( 'order_note', 'webhook_delivery', 'review', 'action_log' )
);
if ( empty( $exclude ) ) {
return wp_count_comments( $post_id );
}
array_walk( $exclude, 'esc_sql' );
$where = sprintf(
"WHERE comment_type NOT IN ( '%s' )",
implode( "','", $exclude )
);
$count = $wpdb->get_results(
"SELECT comment_approved, COUNT(*) AS num_comments
FROM $wpdb->comments
{$where}
GROUP BY comment_approved
"
);
$approved = array(
'0' => 'moderated',
'1' => 'approved',
'spam' => 'spam',
'trash' => 'trash',
'post-trashed' => 'post-trashed',
);
// https://developer.wordpress.org/reference/functions/get_comment_count/#source
foreach ( $count as $row ) {
if ( ! in_array( $row->comment_approved, array( 'post-trashed', 'trash', 'spam' ), true ) ) {
$counts['all'] += $row->num_comments;
$counts['total_comments'] += $row->num_comments;
} elseif ( ! in_array( $row->comment_approved, array( 'post-trashed', 'trash' ), true ) ) {
$counts['total_comments'] += $row->num_comments;
}
if ( isset( $approved[ $row->comment_approved ] ) ) {
$counts[ $approved[ $row->comment_approved ] ] = $row->num_comments;
}
}
foreach ( $approved as $key ) {
if ( empty( $counts[ $key ] ) ) {
$counts[ $key ] = 0;
}
}
$counts = (object) $counts;
return $counts;
}
/**
* traps `wp_die()` calls and outputs a JSON response instead.
* The result is always output, never returned.
*
* @param string|null $error_code Call with string to start the trapping. Call with null to stop.
* @param int $http_status HTTP status code, 400 by default.
*/
function trap_wp_die( $error_code = null, $http_status = 400 ) {
if ( is_null( $error_code ) ) {
$this->trapped_error = null;
// Stop trapping
remove_filter( 'wp_die_handler', array( $this, 'wp_die_handler_callback' ) );
return;
}
// If API called via PHP, bail: don't do our custom wp_die(). Do the normal wp_die().
if ( defined( 'IS_WPCOM' ) && IS_WPCOM ) {
if ( ! defined( 'REST_API_REQUEST' ) || ! REST_API_REQUEST ) {
return;
}
} else {
if ( ! defined( 'XMLRPC_REQUEST' ) || ! XMLRPC_REQUEST ) {
return;
}
}
$this->trapped_error = array(
'status' => $http_status,
'code' => $error_code,
'message' => '',
);
// Start trapping
add_filter( 'wp_die_handler', array( $this, 'wp_die_handler_callback' ) );
}
function wp_die_handler_callback() {
return array( $this, 'wp_die_handler' );
}
function wp_die_handler( $message, $title = '', $args = array() ) {
// Allow wp_die calls to override HTTP status code...
$args = wp_parse_args( $args, array(
'response' => $this->trapped_error['status'],
) );
// ... unless it's 500 ( see http://wp.me/pMz3w-5VV )
if ( (int) $args['response'] !== 500 ) {
$this->trapped_error['status'] = $args['response'];
}
if ( $title ) {
$message = "$title: $message";
}
$this->trapped_error['message'] = wp_kses( $message, array() );
switch ( $this->trapped_error['code'] ) {
case 'comment_failure' :
if ( did_action( 'comment_duplicate_trigger' ) ) {
$this->trapped_error['code'] = 'comment_duplicate';
} else if ( did_action( 'comment_flood_trigger' ) ) {
$this->trapped_error['code'] = 'comment_flood';
}
break;
}
// We still want to exit so that code execution stops where it should.
// Attach the JSON output to the WordPress shutdown handler
add_action( 'shutdown', array( $this, 'output_trapped_error' ), 0 );
exit;
}
function output_trapped_error() {
$this->exit = false; // We're already exiting once. Don't do it twice.
$this->output( $this->trapped_error['status'], (object) array(
'error' => $this->trapped_error['code'],
'message' => $this->trapped_error['message'],
) );
}
function finish_request() {
if ( function_exists( 'fastcgi_finish_request' ) )
return fastcgi_finish_request();
}
}
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