984 lines
34 KiB
PHP
984 lines
34 KiB
PHP
<?php
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/**
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* HTTP API: WP_Http class
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*
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* @package WordPress
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* @subpackage HTTP
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* @since 2.7.0
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*/
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if ( ! class_exists( 'Requests' ) ) {
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require( ABSPATH . WPINC . '/class-requests.php' );
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Requests::register_autoloader();
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Requests::set_certificate_path( ABSPATH . WPINC . '/certificates/ca-bundle.crt' );
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}
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/**
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* Core class used for managing HTTP transports and making HTTP requests.
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*
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* This class is used to consistently make outgoing HTTP requests easy for developers
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* while still being compatible with the many PHP configurations under which
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* WordPress runs.
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*
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* Debugging includes several actions, which pass different variables for debugging the HTTP API.
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*
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* @since 2.7.0
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*/
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class WP_Http {
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// Aliases for HTTP response codes.
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const HTTP_CONTINUE = 100;
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const SWITCHING_PROTOCOLS = 101;
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const PROCESSING = 102;
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const OK = 200;
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const CREATED = 201;
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const ACCEPTED = 202;
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const NON_AUTHORITATIVE_INFORMATION = 203;
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const NO_CONTENT = 204;
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const RESET_CONTENT = 205;
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const PARTIAL_CONTENT = 206;
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const MULTI_STATUS = 207;
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const IM_USED = 226;
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const MULTIPLE_CHOICES = 300;
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const MOVED_PERMANENTLY = 301;
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const FOUND = 302;
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const SEE_OTHER = 303;
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const NOT_MODIFIED = 304;
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const USE_PROXY = 305;
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const RESERVED = 306;
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const TEMPORARY_REDIRECT = 307;
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const PERMANENT_REDIRECT = 308;
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const BAD_REQUEST = 400;
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const UNAUTHORIZED = 401;
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const PAYMENT_REQUIRED = 402;
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const FORBIDDEN = 403;
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const NOT_FOUND = 404;
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const METHOD_NOT_ALLOWED = 405;
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const NOT_ACCEPTABLE = 406;
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const PROXY_AUTHENTICATION_REQUIRED = 407;
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const REQUEST_TIMEOUT = 408;
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const CONFLICT = 409;
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const GONE = 410;
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const LENGTH_REQUIRED = 411;
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const PRECONDITION_FAILED = 412;
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const REQUEST_ENTITY_TOO_LARGE = 413;
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const REQUEST_URI_TOO_LONG = 414;
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const UNSUPPORTED_MEDIA_TYPE = 415;
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const REQUESTED_RANGE_NOT_SATISFIABLE = 416;
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const EXPECTATION_FAILED = 417;
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const IM_A_TEAPOT = 418;
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const MISDIRECTED_REQUEST = 421;
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const UNPROCESSABLE_ENTITY = 422;
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const LOCKED = 423;
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const FAILED_DEPENDENCY = 424;
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const UPGRADE_REQUIRED = 426;
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const PRECONDITION_REQUIRED = 428;
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const TOO_MANY_REQUESTS = 429;
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const REQUEST_HEADER_FIELDS_TOO_LARGE = 431;
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const UNAVAILABLE_FOR_LEGAL_REASONS = 451;
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const INTERNAL_SERVER_ERROR = 500;
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const NOT_IMPLEMENTED = 501;
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const BAD_GATEWAY = 502;
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const SERVICE_UNAVAILABLE = 503;
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const GATEWAY_TIMEOUT = 504;
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const HTTP_VERSION_NOT_SUPPORTED = 505;
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const VARIANT_ALSO_NEGOTIATES = 506;
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const INSUFFICIENT_STORAGE = 507;
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const NOT_EXTENDED = 510;
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const NETWORK_AUTHENTICATION_REQUIRED = 511;
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/**
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* Send an HTTP request to a URI.
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*
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* Please note: The only URI that are supported in the HTTP Transport implementation
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* are the HTTP and HTTPS protocols.
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*
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* @access public
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* @since 2.7.0
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*
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* @global string $wp_version
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*
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* @param string $url The request URL.
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* @param string|array $args {
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* Optional. Array or string of HTTP request arguments.
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*
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* @type string $method Request method. Accepts 'GET', 'POST', 'HEAD', or 'PUT'.
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* Some transports technically allow others, but should not be
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* assumed. Default 'GET'.
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* @type int $timeout How long the connection should stay open in seconds. Default 5.
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* @type int $redirection Number of allowed redirects. Not supported by all transports
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* Default 5.
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* @type string $httpversion Version of the HTTP protocol to use. Accepts '1.0' and '1.1'.
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* Default '1.0'.
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* @type string $user-agent User-agent value sent.
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* Default WordPress/' . $wp_version . '; ' . get_bloginfo( 'url' ).
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* @type bool $reject_unsafe_urls Whether to pass URLs through wp_http_validate_url().
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* Default false.
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* @type bool $blocking Whether the calling code requires the result of the request.
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* If set to false, the request will be sent to the remote server,
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* and processing returned to the calling code immediately, the caller
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* will know if the request succeeded or failed, but will not receive
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* any response from the remote server. Default true.
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* @type string|array $headers Array or string of headers to send with the request.
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* Default empty array.
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* @type array $cookies List of cookies to send with the request. Default empty array.
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* @type string|array $body Body to send with the request. Default null.
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* @type bool $compress Whether to compress the $body when sending the request.
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* Default false.
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* @type bool $decompress Whether to decompress a compressed response. If set to false and
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* compressed content is returned in the response anyway, it will
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* need to be separately decompressed. Default true.
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* @type bool $sslverify Whether to verify SSL for the request. Default true.
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* @type string sslcertificates Absolute path to an SSL certificate .crt file.
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* Default ABSPATH . WPINC . '/certificates/ca-bundle.crt'.
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* @type bool $stream Whether to stream to a file. If set to true and no filename was
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* given, it will be droped it in the WP temp dir and its name will
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* be set using the basename of the URL. Default false.
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* @type string $filename Filename of the file to write to when streaming. $stream must be
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* set to true. Default null.
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* @type int $limit_response_size Size in bytes to limit the response to. Default null.
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*
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* }
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* @return array|WP_Error Array containing 'headers', 'body', 'response', 'cookies', 'filename'.
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* A WP_Error instance upon error.
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*/
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public function request( $url, $args = array() ) {
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global $wp_version;
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$defaults = array(
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'method' => 'GET',
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/**
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* Filters the timeout value for an HTTP request.
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*
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* @since 2.7.0
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*
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* @param int $timeout_value Time in seconds until a request times out.
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* Default 5.
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*/
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'timeout' => apply_filters( 'http_request_timeout', 5 ),
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/**
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* Filters the number of redirects allowed during an HTTP request.
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*
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* @since 2.7.0
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*
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* @param int $redirect_count Number of redirects allowed. Default 5.
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*/
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'redirection' => apply_filters( 'http_request_redirection_count', 5 ),
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/**
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* Filters the version of the HTTP protocol used in a request.
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*
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* @since 2.7.0
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*
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* @param string $version Version of HTTP used. Accepts '1.0' and '1.1'.
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* Default '1.0'.
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*/
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'httpversion' => apply_filters( 'http_request_version', '1.0' ),
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/**
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* Filters the user agent value sent with an HTTP request.
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*
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* @since 2.7.0
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*
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* @param string $user_agent WordPress user agent string.
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*/
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'user-agent' => apply_filters( 'http_headers_useragent', 'WordPress/' . $wp_version . '; ' . get_bloginfo( 'url' ) ),
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/**
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* Filters whether to pass URLs through wp_http_validate_url() in an HTTP request.
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*
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* @since 3.6.0
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*
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* @param bool $pass_url Whether to pass URLs through wp_http_validate_url().
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* Default false.
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*/
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'reject_unsafe_urls' => apply_filters( 'http_request_reject_unsafe_urls', false ),
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'blocking' => true,
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'headers' => array(),
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'cookies' => array(),
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'body' => null,
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'compress' => false,
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'decompress' => true,
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'sslverify' => true,
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'sslcertificates' => ABSPATH . WPINC . '/certificates/ca-bundle.crt',
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'stream' => false,
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'filename' => null,
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'limit_response_size' => null,
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);
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// Pre-parse for the HEAD checks.
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$args = wp_parse_args( $args );
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// By default, Head requests do not cause redirections.
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if ( isset($args['method']) && 'HEAD' == $args['method'] )
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$defaults['redirection'] = 0;
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$r = wp_parse_args( $args, $defaults );
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/**
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* Filters the arguments used in an HTTP request.
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*
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* @since 2.7.0
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*
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* @param array $r An array of HTTP request arguments.
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* @param string $url The request URL.
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*/
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$r = apply_filters( 'http_request_args', $r, $url );
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// The transports decrement this, store a copy of the original value for loop purposes.
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if ( ! isset( $r['_redirection'] ) )
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$r['_redirection'] = $r['redirection'];
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/**
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* Filters whether to preempt an HTTP request's return value.
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*
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* Returning a non-false value from the filter will short-circuit the HTTP request and return
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* early with that value. A filter should return either:
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*
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* - An array containing 'headers', 'body', 'response', 'cookies', and 'filename' elements
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* - A WP_Error instance
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* - boolean false (to avoid short-circuiting the response)
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*
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* Returning any other value may result in unexpected behaviour.
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*
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* @since 2.9.0
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*
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* @param false|array|WP_Error $preempt Whether to preempt an HTTP request's return value. Default false.
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* @param array $r HTTP request arguments.
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* @param string $url The request URL.
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*/
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$pre = apply_filters( 'pre_http_request', false, $r, $url );
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if ( false !== $pre )
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return $pre;
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if ( function_exists( 'wp_kses_bad_protocol' ) ) {
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if ( $r['reject_unsafe_urls'] ) {
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$url = wp_http_validate_url( $url );
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}
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if ( $url ) {
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$url = wp_kses_bad_protocol( $url, array( 'http', 'https', 'ssl' ) );
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}
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}
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$arrURL = @parse_url( $url );
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if ( empty( $url ) || empty( $arrURL['scheme'] ) ) {
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return new WP_Error('http_request_failed', __('A valid URL was not provided.'));
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}
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if ( $this->block_request( $url ) ) {
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return new WP_Error( 'http_request_failed', __( 'User has blocked requests through HTTP.' ) );
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}
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// If we are streaming to a file but no filename was given drop it in the WP temp dir
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// and pick its name using the basename of the $url
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if ( $r['stream'] ) {
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if ( empty( $r['filename'] ) ) {
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$r['filename'] = get_temp_dir() . basename( $url );
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}
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// Force some settings if we are streaming to a file and check for existence and perms of destination directory
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$r['blocking'] = true;
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if ( ! wp_is_writable( dirname( $r['filename'] ) ) ) {
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return new WP_Error( 'http_request_failed', __( 'Destination directory for file streaming does not exist or is not writable.' ) );
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}
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}
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if ( is_null( $r['headers'] ) ) {
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$r['headers'] = array();
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}
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// WP allows passing in headers as a string, weirdly.
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if ( ! is_array( $r['headers'] ) ) {
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$processedHeaders = WP_Http::processHeaders( $r['headers'] );
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$r['headers'] = $processedHeaders['headers'];
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}
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// Setup arguments
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$headers = $r['headers'];
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$data = $r['body'];
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$type = $r['method'];
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$options = array(
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'timeout' => $r['timeout'],
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'useragent' => $r['user-agent'],
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'blocking' => $r['blocking'],
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'hooks' => new Requests_Hooks(),
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);
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// Ensure redirects follow browser behaviour.
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$options['hooks']->register( 'requests.before_redirect', array( get_class(), 'browser_redirect_compatibility' ) );
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if ( $r['stream'] ) {
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$options['filename'] = $r['filename'];
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}
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if ( empty( $r['redirection'] ) ) {
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$options['follow_redirects'] = false;
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}
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else {
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$options['redirects'] = $r['redirection'];
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}
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// Use byte limit, if we can
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if ( isset( $r['limit_response_size'] ) ) {
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$options['max_bytes'] = $r['limit_response_size'];
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}
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// If we've got cookies, use them
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if ( ! empty( $r['cookies'] ) ) {
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$options['cookies'] = $r['cookies'];
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}
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// SSL certificate handling
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if ( ! $r['sslverify'] ) {
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$options['verify'] = false;
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}
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else {
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$options['verify'] = $r['sslcertificates'];
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}
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/**
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* Filters whether SSL should be verified for non-local requests.
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*
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* @since 2.8.0
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*
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* @param bool $ssl_verify Whether to verify the SSL connection. Default true.
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*/
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$options['verify'] = apply_filters( 'https_ssl_verify', $options['verify'] );
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try {
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$requests_response = Requests::request( $url, $headers, $data, $type, $options );
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// Convert the response into an array
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$http_response = new WP_HTTP_Requests_Response( $requests_response, $r['filename'] );
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$response = $http_response->to_array();
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// Add the original object to the array.
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$response['http_response'] = $http_response;
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}
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catch ( Requests_Exception $e ) {
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$response = new WP_Error( 'http_request_failed', $e->getMessage() );
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}
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/**
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* Fires after an HTTP API response is received and before the response is returned.
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*
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* @since 2.8.0
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*
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* @param array|WP_Error $response HTTP response or WP_Error object.
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* @param string $context Context under which the hook is fired.
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* @param string $class HTTP transport used.
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* @param array $args HTTP request arguments.
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* @param string $url The request URL.
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*/
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do_action( 'http_api_debug', $response, 'response', 'Requests', $r, $url );
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if ( is_wp_error( $response ) ) {
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return $response;
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}
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if ( ! $r['blocking'] ) {
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return array(
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'headers' => array(),
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'body' => '',
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'response' => array(
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'code' => false,
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'message' => false,
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),
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'cookies' => array(),
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'http_response' => null,
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);
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}
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/**
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* Filters the HTTP API response immediately before the response is returned.
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*
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* @since 2.9.0
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*
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* @param array $response HTTP response.
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* @param array $r HTTP request arguments.
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* @param string $url The request URL.
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*/
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return apply_filters( 'http_response', $response, $r, $url );
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}
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/**
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* Match redirect behaviour to browser handling.
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*
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* Changes 302 redirects from POST to GET to match browser handling. Per
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* RFC 7231, user agents can deviate from the strict reading of the
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* specification for compatibility purposes.
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*
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* @param string $location URL to redirect to.
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* @param array $headers Headers for the redirect.
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* @param array $options Redirect request options.
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* @param Requests_Response $original Response object.
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*/
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public static function browser_redirect_compatibility( $location, $headers, $data, &$options, $original ) {
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// Browser compat
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if ( $original->status_code === 302 ) {
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$options['type'] = Requests::GET;
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}
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}
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/**
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* Tests which transports are capable of supporting the request.
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*
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* @since 3.2.0
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* @access public
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*
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* @param array $args Request arguments
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* @param string $url URL to Request
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*
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* @return string|false Class name for the first transport that claims to support the request. False if no transport claims to support the request.
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*/
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public function _get_first_available_transport( $args, $url = null ) {
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$transports = array( 'curl', 'streams' );
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/**
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* Filters which HTTP transports are available and in what order.
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*
|
|
* @since 3.7.0
|
|
*
|
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* @param array $transports Array of HTTP transports to check. Default array contains
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* 'curl', and 'streams', in that order.
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* @param array $args HTTP request arguments.
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* @param string $url The URL to request.
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*/
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$request_order = apply_filters( 'http_api_transports', $transports, $args, $url );
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// Loop over each transport on each HTTP request looking for one which will serve this request's needs.
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foreach ( $request_order as $transport ) {
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if ( in_array( $transport, $transports ) ) {
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$transport = ucfirst( $transport );
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}
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$class = 'WP_Http_' . $transport;
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// Check to see if this transport is a possibility, calls the transport statically.
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if ( !call_user_func( array( $class, 'test' ), $args, $url ) )
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continue;
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return $class;
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}
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return false;
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}
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|
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/**
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* Dispatches a HTTP request to a supporting transport.
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*
|
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* Tests each transport in order to find a transport which matches the request arguments.
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* Also caches the transport instance to be used later.
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*
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* The order for requests is cURL, and then PHP Streams.
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*
|
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* @since 3.2.0
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*
|
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* @static
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* @access private
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*
|
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* @param string $url URL to Request
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* @param array $args Request arguments
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* @return array|WP_Error Array containing 'headers', 'body', 'response', 'cookies', 'filename'. A WP_Error instance upon error
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*/
|
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private function _dispatch_request( $url, $args ) {
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static $transports = array();
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$class = $this->_get_first_available_transport( $args, $url );
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if ( !$class )
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return new WP_Error( 'http_failure', __( 'There are no HTTP transports available which can complete the requested request.' ) );
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// Transport claims to support request, instantiate it and give it a whirl.
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if ( empty( $transports[$class] ) )
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$transports[$class] = new $class;
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|
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$response = $transports[$class]->request( $url, $args );
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|
|
/**
|
|
* Fires after an HTTP API response is received and before the response is returned.
|
|
*
|
|
* @since 2.8.0
|
|
*
|
|
* @param array|WP_Error $response HTTP response or WP_Error object.
|
|
* @param string $context Context under which the hook is fired.
|
|
* @param string $class HTTP transport used.
|
|
* @param array $args HTTP request arguments.
|
|
* @param string $url The request URL.
|
|
*/
|
|
do_action( 'http_api_debug', $response, 'response', $class, $args, $url );
|
|
|
|
if ( is_wp_error( $response ) )
|
|
return $response;
|
|
|
|
/**
|
|
* Filters the HTTP API response immediately before the response is returned.
|
|
*
|
|
* @since 2.9.0
|
|
*
|
|
* @param array $response HTTP response.
|
|
* @param array $args HTTP request arguments.
|
|
* @param string $url The request URL.
|
|
*/
|
|
return apply_filters( 'http_response', $response, $args, $url );
|
|
}
|
|
|
|
/**
|
|
* Uses the POST HTTP method.
|
|
*
|
|
* Used for sending data that is expected to be in the body.
|
|
*
|
|
* @access public
|
|
* @since 2.7.0
|
|
*
|
|
* @param string $url The request URL.
|
|
* @param string|array $args Optional. Override the defaults.
|
|
* @return array|WP_Error Array containing 'headers', 'body', 'response', 'cookies', 'filename'. A WP_Error instance upon error
|
|
*/
|
|
public function post($url, $args = array()) {
|
|
$defaults = array('method' => 'POST');
|
|
$r = wp_parse_args( $args, $defaults );
|
|
return $this->request($url, $r);
|
|
}
|
|
|
|
/**
|
|
* Uses the GET HTTP method.
|
|
*
|
|
* Used for sending data that is expected to be in the body.
|
|
*
|
|
* @access public
|
|
* @since 2.7.0
|
|
*
|
|
* @param string $url The request URL.
|
|
* @param string|array $args Optional. Override the defaults.
|
|
* @return array|WP_Error Array containing 'headers', 'body', 'response', 'cookies', 'filename'. A WP_Error instance upon error
|
|
*/
|
|
public function get($url, $args = array()) {
|
|
$defaults = array('method' => 'GET');
|
|
$r = wp_parse_args( $args, $defaults );
|
|
return $this->request($url, $r);
|
|
}
|
|
|
|
/**
|
|
* Uses the HEAD HTTP method.
|
|
*
|
|
* Used for sending data that is expected to be in the body.
|
|
*
|
|
* @access public
|
|
* @since 2.7.0
|
|
*
|
|
* @param string $url The request URL.
|
|
* @param string|array $args Optional. Override the defaults.
|
|
* @return array|WP_Error Array containing 'headers', 'body', 'response', 'cookies', 'filename'. A WP_Error instance upon error
|
|
*/
|
|
public function head($url, $args = array()) {
|
|
$defaults = array('method' => 'HEAD');
|
|
$r = wp_parse_args( $args, $defaults );
|
|
return $this->request($url, $r);
|
|
}
|
|
|
|
/**
|
|
* Parses the responses and splits the parts into headers and body.
|
|
*
|
|
* @access public
|
|
* @static
|
|
* @since 2.7.0
|
|
*
|
|
* @param string $strResponse The full response string
|
|
* @return array Array with 'headers' and 'body' keys.
|
|
*/
|
|
public static function processResponse($strResponse) {
|
|
$res = explode("\r\n\r\n", $strResponse, 2);
|
|
|
|
return array('headers' => $res[0], 'body' => isset($res[1]) ? $res[1] : '');
|
|
}
|
|
|
|
/**
|
|
* Transform header string into an array.
|
|
*
|
|
* If an array is given then it is assumed to be raw header data with numeric keys with the
|
|
* headers as the values. No headers must be passed that were already processed.
|
|
*
|
|
* @access public
|
|
* @static
|
|
* @since 2.7.0
|
|
*
|
|
* @param string|array $headers
|
|
* @param string $url The URL that was requested
|
|
* @return array Processed string headers. If duplicate headers are encountered,
|
|
* Then a numbered array is returned as the value of that header-key.
|
|
*/
|
|
public static function processHeaders( $headers, $url = '' ) {
|
|
// Split headers, one per array element.
|
|
if ( is_string($headers) ) {
|
|
// Tolerate line terminator: CRLF = LF (RFC 2616 19.3).
|
|
$headers = str_replace("\r\n", "\n", $headers);
|
|
/*
|
|
* Unfold folded header fields. LWS = [CRLF] 1*( SP | HT ) <US-ASCII SP, space (32)>,
|
|
* <US-ASCII HT, horizontal-tab (9)> (RFC 2616 2.2).
|
|
*/
|
|
$headers = preg_replace('/\n[ \t]/', ' ', $headers);
|
|
// Create the headers array.
|
|
$headers = explode("\n", $headers);
|
|
}
|
|
|
|
$response = array('code' => 0, 'message' => '');
|
|
|
|
/*
|
|
* If a redirection has taken place, The headers for each page request may have been passed.
|
|
* In this case, determine the final HTTP header and parse from there.
|
|
*/
|
|
for ( $i = count($headers)-1; $i >= 0; $i-- ) {
|
|
if ( !empty($headers[$i]) && false === strpos($headers[$i], ':') ) {
|
|
$headers = array_splice($headers, $i);
|
|
break;
|
|
}
|
|
}
|
|
|
|
$cookies = array();
|
|
$newheaders = array();
|
|
foreach ( (array) $headers as $tempheader ) {
|
|
if ( empty($tempheader) )
|
|
continue;
|
|
|
|
if ( false === strpos($tempheader, ':') ) {
|
|
$stack = explode(' ', $tempheader, 3);
|
|
$stack[] = '';
|
|
list( , $response['code'], $response['message']) = $stack;
|
|
continue;
|
|
}
|
|
|
|
list($key, $value) = explode(':', $tempheader, 2);
|
|
|
|
$key = strtolower( $key );
|
|
$value = trim( $value );
|
|
|
|
if ( isset( $newheaders[ $key ] ) ) {
|
|
if ( ! is_array( $newheaders[ $key ] ) )
|
|
$newheaders[$key] = array( $newheaders[ $key ] );
|
|
$newheaders[ $key ][] = $value;
|
|
} else {
|
|
$newheaders[ $key ] = $value;
|
|
}
|
|
if ( 'set-cookie' == $key )
|
|
$cookies[] = new WP_Http_Cookie( $value, $url );
|
|
}
|
|
|
|
// Cast the Response Code to an int
|
|
$response['code'] = intval( $response['code'] );
|
|
|
|
return array('response' => $response, 'headers' => $newheaders, 'cookies' => $cookies);
|
|
}
|
|
|
|
/**
|
|
* Takes the arguments for a ::request() and checks for the cookie array.
|
|
*
|
|
* If it's found, then it upgrades any basic name => value pairs to WP_Http_Cookie instances,
|
|
* which are each parsed into strings and added to the Cookie: header (within the arguments array).
|
|
* Edits the array by reference.
|
|
*
|
|
* @access public
|
|
* @version 2.8.0
|
|
* @static
|
|
*
|
|
* @param array $r Full array of args passed into ::request()
|
|
*/
|
|
public static function buildCookieHeader( &$r ) {
|
|
if ( ! empty($r['cookies']) ) {
|
|
// Upgrade any name => value cookie pairs to WP_HTTP_Cookie instances.
|
|
foreach ( $r['cookies'] as $name => $value ) {
|
|
if ( ! is_object( $value ) )
|
|
$r['cookies'][ $name ] = new WP_Http_Cookie( array( 'name' => $name, 'value' => $value ) );
|
|
}
|
|
|
|
$cookies_header = '';
|
|
foreach ( (array) $r['cookies'] as $cookie ) {
|
|
$cookies_header .= $cookie->getHeaderValue() . '; ';
|
|
}
|
|
|
|
$cookies_header = substr( $cookies_header, 0, -2 );
|
|
$r['headers']['cookie'] = $cookies_header;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Decodes chunk transfer-encoding, based off the HTTP 1.1 specification.
|
|
*
|
|
* Based off the HTTP http_encoding_dechunk function.
|
|
*
|
|
* @link https://tools.ietf.org/html/rfc2616#section-19.4.6 Process for chunked decoding.
|
|
*
|
|
* @access public
|
|
* @since 2.7.0
|
|
* @static
|
|
*
|
|
* @param string $body Body content
|
|
* @return string Chunked decoded body on success or raw body on failure.
|
|
*/
|
|
public static function chunkTransferDecode( $body ) {
|
|
// The body is not chunked encoded or is malformed.
|
|
if ( ! preg_match( '/^([0-9a-f]+)[^\r\n]*\r\n/i', trim( $body ) ) )
|
|
return $body;
|
|
|
|
$parsed_body = '';
|
|
|
|
// We'll be altering $body, so need a backup in case of error.
|
|
$body_original = $body;
|
|
|
|
while ( true ) {
|
|
$has_chunk = (bool) preg_match( '/^([0-9a-f]+)[^\r\n]*\r\n/i', $body, $match );
|
|
if ( ! $has_chunk || empty( $match[1] ) )
|
|
return $body_original;
|
|
|
|
$length = hexdec( $match[1] );
|
|
$chunk_length = strlen( $match[0] );
|
|
|
|
// Parse out the chunk of data.
|
|
$parsed_body .= substr( $body, $chunk_length, $length );
|
|
|
|
// Remove the chunk from the raw data.
|
|
$body = substr( $body, $length + $chunk_length );
|
|
|
|
// End of the document.
|
|
if ( '0' === trim( $body ) )
|
|
return $parsed_body;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Block requests through the proxy.
|
|
*
|
|
* Those who are behind a proxy and want to prevent access to certain hosts may do so. This will
|
|
* prevent plugins from working and core functionality, if you don't include api.wordpress.org.
|
|
*
|
|
* You block external URL requests by defining WP_HTTP_BLOCK_EXTERNAL as true in your wp-config.php
|
|
* file and this will only allow localhost and your site to make requests. The constant
|
|
* WP_ACCESSIBLE_HOSTS will allow additional hosts to go through for requests. The format of the
|
|
* WP_ACCESSIBLE_HOSTS constant is a comma separated list of hostnames to allow, wildcard domains
|
|
* are supported, eg *.wordpress.org will allow for all subdomains of wordpress.org to be contacted.
|
|
*
|
|
* @since 2.8.0
|
|
* @link https://core.trac.wordpress.org/ticket/8927 Allow preventing external requests.
|
|
* @link https://core.trac.wordpress.org/ticket/14636 Allow wildcard domains in WP_ACCESSIBLE_HOSTS
|
|
*
|
|
* @staticvar array|null $accessible_hosts
|
|
* @staticvar array $wildcard_regex
|
|
*
|
|
* @param string $uri URI of url.
|
|
* @return bool True to block, false to allow.
|
|
*/
|
|
public function block_request($uri) {
|
|
// We don't need to block requests, because nothing is blocked.
|
|
if ( ! defined( 'WP_HTTP_BLOCK_EXTERNAL' ) || ! WP_HTTP_BLOCK_EXTERNAL )
|
|
return false;
|
|
|
|
$check = parse_url($uri);
|
|
if ( ! $check )
|
|
return true;
|
|
|
|
$home = parse_url( get_option('siteurl') );
|
|
|
|
// Don't block requests back to ourselves by default.
|
|
if ( 'localhost' == $check['host'] || ( isset( $home['host'] ) && $home['host'] == $check['host'] ) ) {
|
|
/**
|
|
* Filters whether to block local requests through the proxy.
|
|
*
|
|
* @since 2.8.0
|
|
*
|
|
* @param bool $block Whether to block local requests through proxy.
|
|
* Default false.
|
|
*/
|
|
return apply_filters( 'block_local_requests', false );
|
|
}
|
|
|
|
if ( !defined('WP_ACCESSIBLE_HOSTS') )
|
|
return true;
|
|
|
|
static $accessible_hosts = null;
|
|
static $wildcard_regex = array();
|
|
if ( null === $accessible_hosts ) {
|
|
$accessible_hosts = preg_split('|,\s*|', WP_ACCESSIBLE_HOSTS);
|
|
|
|
if ( false !== strpos(WP_ACCESSIBLE_HOSTS, '*') ) {
|
|
$wildcard_regex = array();
|
|
foreach ( $accessible_hosts as $host )
|
|
$wildcard_regex[] = str_replace( '\*', '.+', preg_quote( $host, '/' ) );
|
|
$wildcard_regex = '/^(' . implode('|', $wildcard_regex) . ')$/i';
|
|
}
|
|
}
|
|
|
|
if ( !empty($wildcard_regex) )
|
|
return !preg_match($wildcard_regex, $check['host']);
|
|
else
|
|
return !in_array( $check['host'], $accessible_hosts ); //Inverse logic, If it's in the array, then we can't access it.
|
|
|
|
}
|
|
|
|
/**
|
|
* Used as a wrapper for PHP's parse_url() function that handles edgecases in < PHP 5.4.7.
|
|
*
|
|
* @access protected
|
|
* @deprecated 4.4.0 Use wp_parse_url()
|
|
* @see wp_parse_url()
|
|
*
|
|
* @param string $url The URL to parse.
|
|
* @return bool|array False on failure; Array of URL components on success;
|
|
* See parse_url()'s return values.
|
|
*/
|
|
protected static function parse_url( $url ) {
|
|
_deprecated_function( __METHOD__, '4.4.0', 'wp_parse_url()' );
|
|
return wp_parse_url( $url );
|
|
}
|
|
|
|
/**
|
|
* Converts a relative URL to an absolute URL relative to a given URL.
|
|
*
|
|
* If an Absolute URL is provided, no processing of that URL is done.
|
|
*
|
|
* @since 3.4.0
|
|
*
|
|
* @static
|
|
* @access public
|
|
*
|
|
* @param string $maybe_relative_path The URL which might be relative
|
|
* @param string $url The URL which $maybe_relative_path is relative to
|
|
* @return string An Absolute URL, in a failure condition where the URL cannot be parsed, the relative URL will be returned.
|
|
*/
|
|
public static function make_absolute_url( $maybe_relative_path, $url ) {
|
|
if ( empty( $url ) )
|
|
return $maybe_relative_path;
|
|
|
|
if ( ! $url_parts = wp_parse_url( $url ) ) {
|
|
return $maybe_relative_path;
|
|
}
|
|
|
|
if ( ! $relative_url_parts = wp_parse_url( $maybe_relative_path ) ) {
|
|
return $maybe_relative_path;
|
|
}
|
|
|
|
// Check for a scheme on the 'relative' url
|
|
if ( ! empty( $relative_url_parts['scheme'] ) ) {
|
|
return $maybe_relative_path;
|
|
}
|
|
|
|
$absolute_path = $url_parts['scheme'] . '://';
|
|
|
|
// Schemeless URL's will make it this far, so we check for a host in the relative url and convert it to a protocol-url
|
|
if ( isset( $relative_url_parts['host'] ) ) {
|
|
$absolute_path .= $relative_url_parts['host'];
|
|
if ( isset( $relative_url_parts['port'] ) )
|
|
$absolute_path .= ':' . $relative_url_parts['port'];
|
|
} else {
|
|
$absolute_path .= $url_parts['host'];
|
|
if ( isset( $url_parts['port'] ) )
|
|
$absolute_path .= ':' . $url_parts['port'];
|
|
}
|
|
|
|
// Start off with the Absolute URL path.
|
|
$path = ! empty( $url_parts['path'] ) ? $url_parts['path'] : '/';
|
|
|
|
// If it's a root-relative path, then great.
|
|
if ( ! empty( $relative_url_parts['path'] ) && '/' == $relative_url_parts['path'][0] ) {
|
|
$path = $relative_url_parts['path'];
|
|
|
|
// Else it's a relative path.
|
|
} elseif ( ! empty( $relative_url_parts['path'] ) ) {
|
|
// Strip off any file components from the absolute path.
|
|
$path = substr( $path, 0, strrpos( $path, '/' ) + 1 );
|
|
|
|
// Build the new path.
|
|
$path .= $relative_url_parts['path'];
|
|
|
|
// Strip all /path/../ out of the path.
|
|
while ( strpos( $path, '../' ) > 1 ) {
|
|
$path = preg_replace( '![^/]+/\.\./!', '', $path );
|
|
}
|
|
|
|
// Strip any final leading ../ from the path.
|
|
$path = preg_replace( '!^/(\.\./)+!', '', $path );
|
|
}
|
|
|
|
// Add the Query string.
|
|
if ( ! empty( $relative_url_parts['query'] ) )
|
|
$path .= '?' . $relative_url_parts['query'];
|
|
|
|
return $absolute_path . '/' . ltrim( $path, '/' );
|
|
}
|
|
|
|
/**
|
|
* Handles HTTP Redirects and follows them if appropriate.
|
|
*
|
|
* @since 3.7.0
|
|
*
|
|
* @static
|
|
*
|
|
* @param string $url The URL which was requested.
|
|
* @param array $args The Arguments which were used to make the request.
|
|
* @param array $response The Response of the HTTP request.
|
|
* @return false|object False if no redirect is present, a WP_HTTP or WP_Error result otherwise.
|
|
*/
|
|
public static function handle_redirects( $url, $args, $response ) {
|
|
// If no redirects are present, or, redirects were not requested, perform no action.
|
|
if ( ! isset( $response['headers']['location'] ) || 0 === $args['_redirection'] )
|
|
return false;
|
|
|
|
// Only perform redirections on redirection http codes.
|
|
if ( $response['response']['code'] > 399 || $response['response']['code'] < 300 )
|
|
return false;
|
|
|
|
// Don't redirect if we've run out of redirects.
|
|
if ( $args['redirection']-- <= 0 )
|
|
return new WP_Error( 'http_request_failed', __('Too many redirects.') );
|
|
|
|
$redirect_location = $response['headers']['location'];
|
|
|
|
// If there were multiple Location headers, use the last header specified.
|
|
if ( is_array( $redirect_location ) )
|
|
$redirect_location = array_pop( $redirect_location );
|
|
|
|
$redirect_location = WP_Http::make_absolute_url( $redirect_location, $url );
|
|
|
|
// POST requests should not POST to a redirected location.
|
|
if ( 'POST' == $args['method'] ) {
|
|
if ( in_array( $response['response']['code'], array( 302, 303 ) ) )
|
|
$args['method'] = 'GET';
|
|
}
|
|
|
|
// Include valid cookies in the redirect process.
|
|
if ( ! empty( $response['cookies'] ) ) {
|
|
foreach ( $response['cookies'] as $cookie ) {
|
|
if ( $cookie->test( $redirect_location ) )
|
|
$args['cookies'][] = $cookie;
|
|
}
|
|
}
|
|
|
|
return wp_remote_request( $redirect_location, $args );
|
|
}
|
|
|
|
/**
|
|
* Determines if a specified string represents an IP address or not.
|
|
*
|
|
* This function also detects the type of the IP address, returning either
|
|
* '4' or '6' to represent a IPv4 and IPv6 address respectively.
|
|
* This does not verify if the IP is a valid IP, only that it appears to be
|
|
* an IP address.
|
|
*
|
|
* @link http://home.deds.nl/~aeron/regex/ for IPv6 regex
|
|
*
|
|
* @since 3.7.0
|
|
* @static
|
|
*
|
|
* @param string $maybe_ip A suspected IP address
|
|
* @return integer|bool Upon success, '4' or '6' to represent a IPv4 or IPv6 address, false upon failure
|
|
*/
|
|
public static function is_ip_address( $maybe_ip ) {
|
|
if ( preg_match( '/^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$/', $maybe_ip ) )
|
|
return 4;
|
|
|
|
if ( false !== strpos( $maybe_ip, ':' ) && preg_match( '/^(((?=.*(::))(?!.*\3.+\3))\3?|([\dA-F]{1,4}(\3|:\b|$)|\2))(?4){5}((?4){2}|(((2[0-4]|1\d|[1-9])?\d|25[0-5])\.?\b){4})$/i', trim( $maybe_ip, ' []' ) ) )
|
|
return 6;
|
|
|
|
return false;
|
|
}
|
|
|
|
}
|