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;

/**

static function init( $method = null, $url = null, $post_body = null ) {

if ( !self::$self ) {

$class = function_exists( 'get_called_class' ) ? get_called_class() : __CLASS__;

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 ) {

/**

do_action( 'wpcom_json_api_options' );

return $this->output( 200, '', 'plain/text' );

}

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 );

// HACK Alert!

// In order to workaround a bug in the iOS 5.6 release we need to handle /rest/sites/new as if it was

// /rest/v1.1/sites/new

if ( $this->path === '/rest/sites/new' ) {

$this->version = '1.1';

$this->path = '/sites/new';

} else if ( $this->path === '/rest/users/new' ) {

$this->version = '1.1';

$this->path = '/users/new';

} else {

$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 ) {

/**

do_action( 'wpcom_json_api_output', 'help' );

if ( 'json' === $help_content_type ) {

$docs = array();

foreach ( $matching_endpoints as $matching_endpoint ) {

if ( $matching_endpoint[0]->is_publicly_documentable() || 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() || 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 );

}

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' ) {

// 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' );

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'] ) ) {

$response = array(

'code' => (int) $status_code,

'headers' => array(

array(

'name' => 'Content-Type',

'value' => $content_type,

),

),

'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(),

);

return array(

'status_code' => $status_code,

'errors' => $response

);

}

function output_error( $error ) {

if ( function_exists( 'bump_stats_extra' ) ) {

$client_id = ! empty( $this->token_details['client_id'] ) ? $this->token_details['client_id'] : 0;

bump_stats_extra( 'rest-api-errors', $client_id );

}

$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 ) ) {

$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 ) {

/**

$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 = 96 ) {

add_filter( 'pre_option_show_avatars', '__return_true', 999 );

$_SERVER['HTTPS'] = 'off';

$avatar_img_element = get_avatar( $email, $avatar_size, '' );

if ( !$avatar_img_element || is_wp_error( $avatar_img_element ) ) {

$return = '';

} elseif ( !preg_match( '#src=([\'"])?(.*?)(?(1)\\1|\s)#', $avatar_img_element, $matches ) ) {

$return = '';

} else {

$return = esc_url_raw( htmlspecialchars_decode( $matches[2] ) );

}

remove_filter( 'pre_option_show_avatars', '__return_true', 999 );

if ( '--UNset--' === $this->_server_https ) {

unset( $_SERVER['HTTPS'] );

} else {

$_SERVER['HTTPS'] = $this->_server_https;

}

return $return;

}

/**

function trap_wp_die( $error_code = null ) {

// Stop trapping

if ( is_null( $error_code ) ) {

$this->trapped_error = null;

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;

}

}

// Start trapping

$this->trapped_error = array(

'status' => 500,

'code' => $error_code,

'message' => '',

);

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() ) {

$args = wp_parse_args( $args, array(

'response' => 500,

) );

if ( $title ) {

$message = "$title: $message";

}

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;

}

$this->trapped_error['status'] = $args['response'];

$this->trapped_error['message'] = wp_kses( $message, array() );

// We still want to exit so that code execution stops where it should.

// Attach the JSON output to 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();

}