X-Git-Url: https://scripts.mit.edu/gitweb/autoinstalls/wordpress.git/blobdiff_plain/d3b1ea255664edd2deef17f900a655613d20820d..0459461f9ea42e0b090759ff6fe5f48360bef750:/wp-includes/http.php diff --git a/wp-includes/http.php b/wp-includes/http.php index af4c43b3..9f254a15 100644 --- a/wp-includes/http.php +++ b/wp-includes/http.php @@ -1,1971 +1,207 @@ - */ - -/** - * WordPress HTTP Class for managing HTTP Transports and making HTTP requests. - * - * This class is called for the functionality of making HTTP requests and should replace Snoopy - * functionality, eventually. There is no available functionality to add HTTP transport - * implementations, since most of the HTTP transports are added and available for use. - * - * The exception is that cURL is not available as a transport and lacking an implementation. It will - * be added later and should be a patch on the WordPress Trac. - * - * There are no properties, because none are needed and for performance reasons. Some of the - * functions are static and while they do have some overhead over functions in PHP4, the purpose is - * maintainability. When PHP5 is finally the requirement, it will be easy to add the static keyword - * to the code. It is not as easy to convert a function to a method after enough code uses the old - * way. - * - * Debugging includes several actions, which pass different variables for debugging the HTTP API. - * - * http_transport_get_debug - gives working, nonblocking, and blocking transports. - * - * http_transport_post_debug - gives working, nonblocking, and blocking transports. - * - * @package WordPress - * @subpackage HTTP - * @since 2.7.0 - */ -class WP_Http { - - /** - * PHP4 style Constructor - Calls PHP5 Style Constructor - * - * @since 2.7.0 - * @return WP_Http - */ - function WP_Http() { - $this->__construct(); - } - - /** - * PHP5 style Constructor - Setup available transport if not available. - * - * PHP4 does not have the 'self' keyword and since WordPress supports PHP4, - * the class needs to be used for the static call. - * - * The transport are setup to save time. This should only be called once, so - * the overhead should be fine. - * - * @since 2.7.0 - * @return WP_Http - */ - function __construct() { - WP_Http::_getTransport(); - WP_Http::_postTransport(); - } - - /** - * Tests the WordPress HTTP objects for an object to use and returns it. - * - * Tests all of the objects and returns the object that passes. Also caches - * that object to be used later. - * - * The order for the GET/HEAD requests are HTTP Extension, FSockopen Streams, - * Fopen, and finally cURL. Whilst Fsockopen has the highest overhead, Its - * used 2nd due to high compatibility with most hosts, The HTTP Extension is - * tested first due to hosts which have it enabled, are likely to work - * correctly with it. - * - * There are currently issues with "localhost" not resolving correctly with - * DNS. This may cause an error "failed to open stream: A connection attempt - * failed because the connected party did not properly respond after a - * period of time, or established connection failed because connected host - * has failed to respond." - * - * @since 2.7.0 - * @access private - * - * @param array $args Request args, default us an empty array - * @return object|null Null if no transports are available, HTTP transport object. - */ - function &_getTransport( $args = array() ) { - static $working_transport, $blocking_transport, $nonblocking_transport; - - if ( is_null($working_transport) ) { - if ( true === WP_Http_ExtHttp::test($args) ) { - $working_transport['exthttp'] = new WP_Http_ExtHttp(); - $blocking_transport[] = &$working_transport['exthttp']; - } else if ( true === WP_Http_Fsockopen::test($args) ) { - $working_transport['fsockopen'] = new WP_Http_Fsockopen(); - $blocking_transport[] = &$working_transport['fsockopen']; - } else if ( true === WP_Http_Streams::test($args) ) { - $working_transport['streams'] = new WP_Http_Streams(); - $blocking_transport[] = &$working_transport['streams']; - } else if ( true === WP_Http_Fopen::test($args) ) { - $working_transport['fopen'] = new WP_Http_Fopen(); - $blocking_transport[] = &$working_transport['fopen']; - } else if ( true === WP_Http_Curl::test($args) ) { - $working_transport['curl'] = new WP_Http_Curl(); - $blocking_transport[] = &$working_transport['curl']; - } - - foreach ( array('curl', 'streams', 'fopen', 'fsockopen', 'exthttp') as $transport ) { - if ( isset($working_transport[$transport]) ) - $nonblocking_transport[] = &$working_transport[$transport]; - } - } - - if ( has_filter('http_transport_get_debug') ) - do_action('http_transport_get_debug', $working_transport, $blocking_transport, $nonblocking_transport); - - if ( isset($args['blocking']) && !$args['blocking'] ) - return $nonblocking_transport; - else - return $blocking_transport; - } - - /** - * Tests the WordPress HTTP objects for an object to use and returns it. - * - * Tests all of the objects and returns the object that passes. Also caches - * that object to be used later. This is for posting content to a URL and - * is used when there is a body. The plain Fopen Transport can not be used - * to send content, but the streams transport can. This is a limitation that - * is addressed here, by just not including that transport. - * - * @since 2.7.0 - * @access private - * - * @param array $args Request args, default us an empty array - * @return object|null Null if no transports are available, HTTP transport object. - */ - function &_postTransport( $args = array() ) { - static $working_transport, $blocking_transport, $nonblocking_transport; - - if ( is_null($working_transport) ) { - if ( true === WP_Http_ExtHttp::test($args) ) { - $working_transport['exthttp'] = new WP_Http_ExtHttp(); - $blocking_transport[] = &$working_transport['exthttp']; - } else if ( true === WP_Http_Fsockopen::test($args) ) { - $working_transport['fsockopen'] = new WP_Http_Fsockopen(); - $blocking_transport[] = &$working_transport['fsockopen']; - } else if ( true === WP_Http_Streams::test($args) ) { - $working_transport['streams'] = new WP_Http_Streams(); - $blocking_transport[] = &$working_transport['streams']; - } else if ( true === WP_Http_Curl::test($args) ) { - $working_transport['curl'] = new WP_Http_Curl(); - $blocking_transport[] = &$working_transport['curl']; - } - - foreach ( array('curl', 'streams', 'fsockopen', 'exthttp') as $transport ) { - if ( isset($working_transport[$transport]) ) - $nonblocking_transport[] = &$working_transport[$transport]; - } - } - - if ( has_filter('http_transport_post_debug') ) - do_action('http_transport_post_debug', $working_transport, $blocking_transport, $nonblocking_transport); - - if ( isset($args['blocking']) && !$args['blocking'] ) - return $nonblocking_transport; - else - return $blocking_transport; - } - - /** - * Send a HTTP request to a URI. - * - * The body and headers are part of the arguments. The 'body' argument is for the body and will - * accept either a string or an array. The 'headers' argument should be an array, but a string - * is acceptable. If the 'body' argument is an array, then it will automatically be escaped - * using http_build_query(). - * - * The only URI that are supported in the HTTP Transport implementation are the HTTP and HTTPS - * protocols. HTTP and HTTPS are assumed so the server might not know how to handle the send - * headers. Other protocols are unsupported and most likely will fail. - * - * The defaults are 'method', 'timeout', 'redirection', 'httpversion', 'blocking' and - * 'user-agent'. - * - * Accepted 'method' values are 'GET', 'POST', and 'HEAD', some transports technically allow - * others, but should not be assumed. The 'timeout' is used to sent how long the connection - * should stay open before failing when no response. 'redirection' is used to track how many - * redirects were taken and used to sent the amount for other transports, but not all transports - * accept setting that value. - * - * The 'httpversion' option is used to sent the HTTP version and accepted values are '1.0', and - * '1.1' and should be a string. Version 1.1 is not supported, because of chunk response. The - * 'user-agent' option is the user-agent and is used to replace the default user-agent, which is - * 'WordPress/WP_Version', where WP_Version is the value from $wp_version. - * - * 'blocking' is the default, which is used to tell the transport, whether it should halt PHP - * while it performs the request or continue regardless. Actually, that isn't entirely correct. - * Blocking mode really just means whether the fread should just pull what it can whenever it - * gets bytes or if it should wait until it has enough in the buffer to read or finishes reading - * the entire content. It doesn't actually always mean that PHP will continue going after making - * the request. - * - * @access public - * @since 2.7.0 - * - * @param string $url URI resource. - * @param str|array $args Optional. Override the defaults. - * @return array containing 'headers', 'body', 'response', 'cookies' - */ - function request( $url, $args = array() ) { - global $wp_version; - - $defaults = array( - 'method' => 'GET', - 'timeout' => apply_filters( 'http_request_timeout', 5), - 'redirection' => apply_filters( 'http_request_redirection_count', 5), - 'httpversion' => apply_filters( 'http_request_version', '1.0'), - 'user-agent' => apply_filters( 'http_headers_useragent', 'WordPress/' . $wp_version . '; ' . get_bloginfo( 'url' ) ), - 'blocking' => true, - 'headers' => array(), - 'cookies' => array(), - 'body' => null, - 'compress' => false, - 'decompress' => true, - 'sslverify' => true - ); - - $r = wp_parse_args( $args, $defaults ); - $r = apply_filters( 'http_request_args', $r, $url ); - - $arrURL = parse_url($url); - - if ( $this->block_request( $url ) ) - return new WP_Error('http_request_failed', 'User has blocked requests through HTTP.'); - - // Determine if this is a https call and pass that on to the transport functions - // so that we can blacklist the transports that do not support ssl verification - $r['ssl'] = $arrURL['scheme'] == 'https' || $arrURL['scheme'] == 'ssl'; - - // Determine if this request is to OUR install of WordPress - $homeURL = parse_url(get_bloginfo('url')); - $r['local'] = $homeURL['host'] == $arrURL['host'] || 'localhost' == $arrURL['host']; - unset($homeURL); - - if ( is_null( $r['headers'] ) ) - $r['headers'] = array(); - - if ( ! is_array($r['headers']) ) { - $processedHeaders = WP_Http::processHeaders($r['headers']); - $r['headers'] = $processedHeaders['headers']; - } - - if ( isset($r['headers']['User-Agent']) ) { - $r['user-agent'] = $r['headers']['User-Agent']; - unset($r['headers']['User-Agent']); - } - - if ( isset($r['headers']['user-agent']) ) { - $r['user-agent'] = $r['headers']['user-agent']; - unset($r['headers']['user-agent']); - } - - // Construct Cookie: header if any cookies are set - WP_Http::buildCookieHeader( $r ); - - if ( WP_Http_Encoding::is_available() ) - $r['headers']['Accept-Encoding'] = WP_Http_Encoding::accept_encoding(); - - if ( is_null($r['body']) ) { - // Some servers fail when sending content without the content-length - // header being set. - $r['headers']['Content-Length'] = 0; - $transports = WP_Http::_getTransport($r); - } else { - if ( is_array( $r['body'] ) || is_object( $r['body'] ) ) { - if ( ! version_compare(phpversion(), '5.1.2', '>=') ) - $r['body'] = _http_build_query($r['body'], null, '&'); - else - $r['body'] = http_build_query($r['body'], null, '&'); - $r['headers']['Content-Type'] = 'application/x-www-form-urlencoded; charset=' . get_option('blog_charset'); - $r['headers']['Content-Length'] = strlen($r['body']); - } - - if ( ! isset( $r['headers']['Content-Length'] ) && ! isset( $r['headers']['content-length'] ) ) - $r['headers']['Content-Length'] = strlen($r['body']); - - $transports = WP_Http::_postTransport($r); - } - - if ( has_action('http_api_debug') ) - do_action('http_api_debug', $transports, 'transports_list'); - - $response = array( 'headers' => array(), 'body' => '', 'response' => array('code' => false, 'message' => false), 'cookies' => array() ); - foreach ( (array) $transports as $transport ) { - $response = $transport->request($url, $r); - - if ( has_action('http_api_debug') ) - do_action( 'http_api_debug', $response, 'response', get_class($transport) ); - - if ( ! is_wp_error($response) ) - return $response; - } - - return $response; - } - - /** - * 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 URI resource. - * @param str|array $args Optional. Override the defaults. - * @return boolean - */ - function post($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 URI resource. - * @param str|array $args Optional. Override the defaults. - * @return boolean - */ - function get($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 URI resource. - * @param str|array $args Optional. Override the defaults. - * @return boolean - */ - function head($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 $strResponse The full response string - * @return array Array with 'headers' and 'body' keys. - */ - function processResponse($strResponse) { - list($theHeaders, $theBody) = explode("\r\n\r\n", $strResponse, 2); - return array('headers' => $theHeaders, 'body' => $theBody); - } - - /** - * 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 $headers - * @return array Processed string headers. If duplicate headers are encountered, - * Then a numbered array is returned as the value of that header-key. - */ - function processHeaders($headers) { - // 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 ) , (RFC 2616 2.2) - $headers = preg_replace('/\n[ \t]/', ' ', $headers); - // create the headers array - $headers = explode("\n", $headers); - } - - $response = array('code' => 0, 'message' => ''); - - $cookies = array(); - $newheaders = array(); - foreach ( $headers as $tempheader ) { - if ( empty($tempheader) ) - continue; - - if ( false === strpos($tempheader, ':') ) { - list( , $iResponseCode, $strResponseMsg) = explode(' ', $tempheader, 3); - $response['code'] = $iResponseCode; - $response['message'] = $strResponseMsg; - continue; - } - - list($key, $value) = explode(':', $tempheader, 2); - - if ( !empty( $value ) ) { - $key = strtolower( $key ); - if ( isset( $newheaders[$key] ) ) { - $newheaders[$key] = array( $newheaders[$key], trim( $value ) ); - } else { - $newheaders[$key] = trim( $value ); - } - if ( 'set-cookie' == strtolower( $key ) ) - $cookies[] = new WP_Http_Cookie( $value ); - } - } - - 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's assumed to contain WP_Http_Cookie objects, 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 $r Full array of args passed into ::request() - */ - function buildCookieHeader( &$r ) { - if ( ! empty($r['cookies']) ) { - $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. Does not support UTF-8. Does not support - * returning footer headers. Shouldn't be too difficult to support it though. - * - * @todo Add support for footer chunked headers. - * @access public - * @since 2.7.0 - * @static - * - * @param string $body Body content - * @return string Chunked decoded body on success or raw body on failure. - */ - function chunkTransferDecode($body) { - $body = str_replace(array("\r\n", "\r"), "\n", $body); - // The body is not chunked encoding or is malformed. - if ( ! preg_match( '/^[0-9a-f]+(\s|\n)+/mi', trim($body) ) ) - return $body; - - $parsedBody = ''; - //$parsedHeaders = array(); Unsupported - - while ( true ) { - $hasChunk = (bool) preg_match( '/^([0-9a-f]+)(\s|\n)+/mi', $body, $match ); - - if ( $hasChunk ) { - if ( empty( $match[1] ) ) - return $body; - - $length = hexdec( $match[1] ); - $chunkLength = strlen( $match[0] ); - - $strBody = substr($body, $chunkLength, $length); - $parsedBody .= $strBody; - - $body = ltrim(str_replace(array($match[0], $strBody), '', $body), "\n"); - - if ( "0" == trim($body) ) - return $parsedBody; // Ignore footer headers. - } else { - return $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 in your wp-config.php file - * and this will only allow localhost and your blog 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. - * - * @since 2.8.0 - * @link http://core.trac.wordpress.org/ticket/8927 Allow preventing external requests. - * - * @param string $uri URI of url. - * @return bool True to block, false to allow. - */ - function block_request($uri) { - // We don't need to block requests, because nothing is blocked. - if ( ! defined('WP_HTTP_BLOCK_EXTERNAL') || ( defined('WP_HTTP_BLOCK_EXTERNAL') && WP_HTTP_BLOCK_EXTERNAL == false ) ) - return false; - - // parse_url() only handles http, https type URLs, and will emit E_WARNING on failure. - // This will be displayed on blogs, which is not reasonable. - $check = @parse_url($uri); - - /* Malformed URL, can not process, but this could mean ssl, so let through anyway. - * - * This isn't very security sound. There are instances where a hacker might attempt - * to bypass the proxy and this check. However, the reason for this behavior is that - * WordPress does not do any checking currently for non-proxy requests, so it is keeps with - * the default unsecure nature of the HTTP request. - */ - if ( $check === false ) - return false; - - $home = parse_url( get_option('siteurl') ); - - // Don't block requests back to ourselves by default - if ( $check['host'] == 'localhost' || $check['host'] == $home['host'] ) - return apply_filters('block_local_requests', false); - - if ( !defined('WP_ACCESSIBLE_HOSTS') ) - return true; - - static $accessible_hosts; - if ( null == $accessible_hosts ) - $accessible_hosts = preg_split('|,\s*|', WP_ACCESSIBLE_HOSTS); - - return !in_array( $check['host'], $accessible_hosts ); //Inverse logic, If its in the array, then we can't access it. - } -} - -/** - * HTTP request method uses fsockopen function to retrieve the url. - * - * This would be the preferred method, but the fsockopen implementation has the most overhead of all - * the HTTP transport implementations. - * - * @package WordPress - * @subpackage HTTP - * @since 2.7.0 - */ -class WP_Http_Fsockopen { - /** - * Send a HTTP request to a URI using fsockopen(). - * - * Does not support non-blocking mode. - * - * @see WP_Http::request For default options descriptions. - * - * @since 2.7 - * @access public - * @param string $url URI resource. - * @param str|array $args Optional. Override the defaults. - * @return array 'headers', 'body', 'cookies' and 'response' keys. - */ - function request($url, $args = array()) { - $defaults = array( - 'method' => 'GET', 'timeout' => 5, - 'redirection' => 5, 'httpversion' => '1.0', - 'blocking' => true, - 'headers' => array(), 'body' => null, 'cookies' => array() - ); - - $r = wp_parse_args( $args, $defaults ); - - if ( isset($r['headers']['User-Agent']) ) { - $r['user-agent'] = $r['headers']['User-Agent']; - unset($r['headers']['User-Agent']); - } else if( isset($r['headers']['user-agent']) ) { - $r['user-agent'] = $r['headers']['user-agent']; - unset($r['headers']['user-agent']); - } - - // Construct Cookie: header if any cookies are set - WP_Http::buildCookieHeader( $r ); - - $iError = null; // Store error number - $strError = null; // Store error string - - $arrURL = parse_url($url); - - $fsockopen_host = $arrURL['host']; - - $secure_transport = false; - - if ( ! isset( $arrURL['port'] ) ) { - if ( ( $arrURL['scheme'] == 'ssl' || $arrURL['scheme'] == 'https' ) && extension_loaded('openssl') ) { - $fsockopen_host = "ssl://$fsockopen_host"; - $arrURL['port'] = 443; - $secure_transport = true; - } else { - $arrURL['port'] = 80; - } - } - - // There are issues with the HTTPS and SSL protocols that cause errors that can be safely - // ignored and should be ignored. - if ( true === $secure_transport ) - $error_reporting = error_reporting(0); - - $startDelay = time(); - - $proxy = new WP_HTTP_Proxy(); - - if ( !defined('WP_DEBUG') || ( defined('WP_DEBUG') && false === WP_DEBUG ) ) { - if ( $proxy->is_enabled() && $proxy->send_through_proxy( $url ) ) - $handle = @fsockopen( $proxy->host(), $proxy->port(), $iError, $strError, $r['timeout'] ); - else - $handle = @fsockopen( $fsockopen_host, $arrURL['port'], $iError, $strError, $r['timeout'] ); - } else { - if ( $proxy->is_enabled() && $proxy->send_through_proxy( $url ) ) - $handle = fsockopen( $proxy->host(), $proxy->port(), $iError, $strError, $r['timeout'] ); - else - $handle = fsockopen( $fsockopen_host, $arrURL['port'], $iError, $strError, $r['timeout'] ); - } - - $endDelay = time(); - - // If the delay is greater than the timeout then fsockopen should't be used, because it will - // cause a long delay. - $elapseDelay = ($endDelay-$startDelay) > $r['timeout']; - if ( true === $elapseDelay ) - add_option( 'disable_fsockopen', $endDelay, null, true ); - - if ( false === $handle ) - return new WP_Error('http_request_failed', $iError . ': ' . $strError); - - stream_set_timeout($handle, $r['timeout'] ); - - if ( $proxy->is_enabled() && $proxy->send_through_proxy( $url ) ) //Some proxies require full URL in this field. - $requestPath = $url; - else - $requestPath = $arrURL['path'] . ( isset($arrURL['query']) ? '?' . $arrURL['query'] : '' ); - - if ( empty($requestPath) ) - $requestPath .= '/'; - - $strHeaders = strtoupper($r['method']) . ' ' . $requestPath . ' HTTP/' . $r['httpversion'] . "\r\n"; - - if ( $proxy->is_enabled() && $proxy->send_through_proxy( $url ) ) - $strHeaders .= 'Host: ' . $arrURL['host'] . ':' . $arrURL['port'] . "\r\n"; - else - $strHeaders .= 'Host: ' . $arrURL['host'] . "\r\n"; - - if ( isset($r['user-agent']) ) - $strHeaders .= 'User-agent: ' . $r['user-agent'] . "\r\n"; - - if ( is_array($r['headers']) ) { - foreach ( (array) $r['headers'] as $header => $headerValue ) - $strHeaders .= $header . ': ' . $headerValue . "\r\n"; - } else { - $strHeaders .= $r['headers']; - } - - if ( $proxy->use_authentication() ) - $strHeaders .= $proxy->authentication_header() . "\r\n"; - - $strHeaders .= "\r\n"; - - if ( ! is_null($r['body']) ) - $strHeaders .= $r['body']; - - fwrite($handle, $strHeaders); - - if ( ! $r['blocking'] ) { - fclose($handle); - return array( 'headers' => array(), 'body' => '', 'response' => array('code' => false, 'message' => false), 'cookies' => array() ); - } - - $strResponse = ''; - while ( ! feof($handle) ) - $strResponse .= fread($handle, 4096); - - fclose($handle); - - if ( true === $secure_transport ) - error_reporting($error_reporting); - - $process = WP_Http::processResponse($strResponse); - $arrHeaders = WP_Http::processHeaders($process['headers']); - - // Is the response code within the 400 range? - if ( (int) $arrHeaders['response']['code'] >= 400 && (int) $arrHeaders['response']['code'] < 500 ) - return new WP_Error('http_request_failed', $arrHeaders['response']['code'] . ': ' . $arrHeaders['response']['message']); - - // If location is found, then assume redirect and redirect to location. - if ( isset($arrHeaders['headers']['location']) ) { - if ( $r['redirection']-- > 0 ) { - return $this->request($arrHeaders['headers']['location'], $r); - } else { - return new WP_Error('http_request_failed', __('Too many redirects.')); - } - } - - // If the body was chunk encoded, then decode it. - if ( ! empty( $process['body'] ) && isset( $arrHeaders['headers']['transfer-encoding'] ) && 'chunked' == $arrHeaders['headers']['transfer-encoding'] ) - $process['body'] = WP_Http::chunkTransferDecode($process['body']); - - if ( true === $r['decompress'] && true === WP_Http_Encoding::should_decode($arrHeaders['headers']) ) - $process['body'] = WP_Http_Encoding::decompress( $process['body'] ); - - return array('headers' => $arrHeaders['headers'], 'body' => $process['body'], 'response' => $arrHeaders['response'], 'cookies' => $arrHeaders['cookies']); - } - - /** - * Whether this class can be used for retrieving an URL. - * - * @since 2.7.0 - * @static - * @return boolean False means this class can not be used, true means it can. - */ - function test( $args = array() ) { - if ( false !== ($option = get_option( 'disable_fsockopen' )) && time()-$option < 43200 ) // 12 hours - return false; - - $is_ssl = isset($args['ssl']) && $args['ssl']; - - if ( ! $is_ssl && function_exists( 'fsockopen' ) ) - $use = true; - elseif ( $is_ssl && extension_loaded('openssl') && function_exists( 'fsockopen' ) ) - $use = true; - else - $use = false; - - return apply_filters('use_fsockopen_transport', $use, $args); - } -} - -/** - * HTTP request method uses fopen function to retrieve the url. - * - * Requires PHP version greater than 4.3.0 for stream support. Does not allow for $context support, - * but should still be okay, to write the headers, before getting the response. Also requires that - * 'allow_url_fopen' to be enabled. - * - * @package WordPress - * @subpackage HTTP - * @since 2.7.0 - */ -class WP_Http_Fopen { - /** - * Send a HTTP request to a URI using fopen(). - * - * This transport does not support sending of headers and body, therefore should not be used in - * the instances, where there is a body and headers. - * - * Notes: Does not support non-blocking mode. Ignores 'redirection' option. - * - * @see WP_Http::retrieve For default options descriptions. - * - * @access public - * @since 2.7.0 - * - * @param string $url URI resource. - * @param str|array $args Optional. Override the defaults. - * @return array 'headers', 'body', 'cookies' and 'response' keys. - */ - function request($url, $args = array()) { - $defaults = array( - 'method' => 'GET', 'timeout' => 5, - 'redirection' => 5, 'httpversion' => '1.0', - 'blocking' => true, - 'headers' => array(), 'body' => null, 'cookies' => array() - ); - - $r = wp_parse_args( $args, $defaults ); - - $arrURL = parse_url($url); - - if ( false === $arrURL ) - return new WP_Error('http_request_failed', sprintf(__('Malformed URL: %s'), $url)); - - if ( 'http' != $arrURL['scheme'] && 'https' != $arrURL['scheme'] ) - $url = str_replace($arrURL['scheme'], 'http', $url); - - if ( !defined('WP_DEBUG') || ( defined('WP_DEBUG') && false === WP_DEBUG ) ) - $handle = @fopen($url, 'r'); - else - $handle = fopen($url, 'r'); - - if (! $handle) - return new WP_Error('http_request_failed', sprintf(__('Could not open handle for fopen() to %s'), $url)); - - stream_set_timeout($handle, $r['timeout'] ); - - if ( ! $r['blocking'] ) { - fclose($handle); - return array( 'headers' => array(), 'body' => '', 'response' => array('code' => false, 'message' => false), 'cookies' => array() ); - } - - $strResponse = ''; - while ( ! feof($handle) ) - $strResponse .= fread($handle, 4096); - - if ( function_exists('stream_get_meta_data') ) { - $meta = stream_get_meta_data($handle); - $theHeaders = $meta['wrapper_data']; - if ( isset( $meta['wrapper_data']['headers'] ) ) - $theHeaders = $meta['wrapper_data']['headers']; - } else { - //$http_response_header is a PHP reserved variable which is set in the current-scope when using the HTTP Wrapper - //see http://php.oregonstate.edu/manual/en/reserved.variables.httpresponseheader.php - $theHeaders = $http_response_header; - } - - fclose($handle); - - $processedHeaders = WP_Http::processHeaders($theHeaders); - - if ( ! empty( $strResponse ) && isset( $processedHeaders['headers']['transfer-encoding'] ) && 'chunked' == $processedHeaders['headers']['transfer-encoding'] ) - $strResponse = WP_Http::chunkTransferDecode($strResponse); - - if ( true === $r['decompress'] && true === WP_Http_Encoding::should_decode($processedHeaders['headers']) ) - $strResponse = WP_Http_Encoding::decompress( $strResponse ); - - return array('headers' => $processedHeaders['headers'], 'body' => $strResponse, 'response' => $processedHeaders['response'], 'cookies' => $processedHeaders['cookies']); - } - - /** - * Whether this class can be used for retrieving an URL. - * - * @since 2.7.0 - * @static - * @return boolean False means this class can not be used, true means it can. - */ - function test($args = array()) { - if ( ! function_exists('fopen') || (function_exists('ini_get') && true != ini_get('allow_url_fopen')) ) - return false; - - $use = true; - - //PHP does not verify SSL certs, We can only make a request via this transports if SSL Verification is turned off. - $is_ssl = isset($args['ssl']) && $args['ssl']; - if ( $is_ssl ) { - $is_local = isset($args['local']) && $args['local']; - $ssl_verify = isset($args['sslverify']) && $args['sslverify']; - if ( $is_local && true != apply_filters('https_local_ssl_verify', true) ) - $use = true; - elseif ( !$is_local && true != apply_filters('https_ssl_verify', true) ) - $use = true; - elseif ( !$ssl_verify ) - $use = true; - else - $use = false; - } - - return apply_filters('use_fopen_transport', $use, $args); - } -} - -/** - * HTTP request method uses Streams to retrieve the url. - * - * Requires PHP 5.0+ and uses fopen with stream context. Requires that 'allow_url_fopen' PHP setting - * to be enabled. - * - * Second preferred method for getting the URL, for PHP 5. + * Standardizes the HTTP requests for WordPress. Handles cookies, gzip encoding and decoding, chunk + * decoding, if HTTP 1.1 and various other difficult HTTP protocol implementations. * * @package WordPress * @subpackage HTTP - * @since 2.7.0 */ -class WP_Http_Streams { - /** - * Send a HTTP request to a URI using streams with fopen(). - * - * @access public - * @since 2.7.0 - * - * @param string $url - * @param str|array $args Optional. Override the defaults. - * @return array 'headers', 'body', 'cookies' and 'response' keys. - */ - function request($url, $args = array()) { - $defaults = array( - 'method' => 'GET', 'timeout' => 5, - 'redirection' => 5, 'httpversion' => '1.0', - 'blocking' => true, - 'headers' => array(), 'body' => null, 'cookies' => array() - ); - - $r = wp_parse_args( $args, $defaults ); - - if ( isset($r['headers']['User-Agent']) ) { - $r['user-agent'] = $r['headers']['User-Agent']; - unset($r['headers']['User-Agent']); - } else if( isset($r['headers']['user-agent']) ) { - $r['user-agent'] = $r['headers']['user-agent']; - unset($r['headers']['user-agent']); - } - - // Construct Cookie: header if any cookies are set - WP_Http::buildCookieHeader( $r ); - - $arrURL = parse_url($url); - - if ( false === $arrURL ) - return new WP_Error('http_request_failed', sprintf(__('Malformed URL: %s'), $url)); - - if ( 'http' != $arrURL['scheme'] && 'https' != $arrURL['scheme'] ) - $url = preg_replace('|^' . preg_quote($arrURL['scheme'], '|') . '|', 'http', $url); - - // Convert Header array to string. - $strHeaders = ''; - if ( is_array( $r['headers'] ) ) - foreach ( $r['headers'] as $name => $value ) - $strHeaders .= "{$name}: $value\r\n"; - else if ( is_string( $r['headers'] ) ) - $strHeaders = $r['headers']; - - $is_local = isset($args['local']) && $args['local']; - $ssl_verify = isset($args['sslverify']) && $args['sslverify']; - if ( $is_local ) - $ssl_verify = apply_filters('https_local_ssl_verify', $ssl_verify); - elseif ( ! $is_local ) - $ssl_verify = apply_filters('https_ssl_verify', $ssl_verify); - - $arrContext = array('http' => - array( - 'method' => strtoupper($r['method']), - 'user_agent' => $r['user-agent'], - 'max_redirects' => $r['redirection'], - 'protocol_version' => (float) $r['httpversion'], - 'header' => $strHeaders, - 'timeout' => $r['timeout'], - 'ssl' => array( - 'verify_peer' => $ssl_verify, - 'verify_host' => $ssl_verify - ) - ) - ); - - $proxy = new WP_HTTP_Proxy(); - - if ( $proxy->is_enabled() && $proxy->send_through_proxy( $url ) ) { - $arrContext['http']['proxy'] = 'tcp://' . $proxy->host() . ':' . $proxy->port(); - $arrContext['http']['request_fulluri'] = true; - - // We only support Basic authentication so this will only work if that is what your proxy supports. - if ( $proxy->use_authentication() ) - $arrContext['http']['header'] .= $proxy->authentication_header() . "\r\n"; - } - - if ( ! is_null($r['body']) && ! empty($r['body'] ) ) - $arrContext['http']['content'] = $r['body']; - - $context = stream_context_create($arrContext); - - if ( ! defined('WP_DEBUG') || ( defined('WP_DEBUG') && false === WP_DEBUG ) ) - $handle = @fopen($url, 'r', false, $context); - else - $handle = fopen($url, 'r', false, $context); - - if ( ! $handle) - return new WP_Error('http_request_failed', sprintf(__('Could not open handle for fopen() to %s'), $url)); - - // WordPress supports PHP 4.3, which has this function. Removed sanity checking for - // performance reasons. - stream_set_timeout($handle, $r['timeout'] ); - - if ( ! $r['blocking'] ) { - stream_set_blocking($handle, 0); - fclose($handle); - return array( 'headers' => array(), 'body' => '', 'response' => array('code' => false, 'message' => false), 'cookies' => array() ); - } - - $strResponse = stream_get_contents($handle); - $meta = stream_get_meta_data($handle); - - fclose($handle); - - $processedHeaders = array(); - if ( isset( $meta['wrapper_data']['headers'] ) ) - $processedHeaders = WP_Http::processHeaders($meta['wrapper_data']['headers']); - else - $processedHeaders = WP_Http::processHeaders($meta['wrapper_data']); - - if ( ! empty( $strResponse ) && isset( $processedHeaders['headers']['transfer-encoding'] ) && 'chunked' == $processedHeaders['headers']['transfer-encoding'] ) - $strResponse = WP_Http::chunkTransferDecode($strResponse); - - if ( true === $r['decompress'] && true === WP_Http_Encoding::should_decode($processedHeaders['headers']) ) - $strResponse = WP_Http_Encoding::decompress( $strResponse ); - - return array('headers' => $processedHeaders['headers'], 'body' => $strResponse, 'response' => $processedHeaders['response'], 'cookies' => $processedHeaders['cookies']); - } - - /** - * Whether this class can be used for retrieving an URL. - * - * @static - * @access public - * @since 2.7.0 - * - * @return boolean False means this class can not be used, true means it can. - */ - function test($args = array()) { - if ( ! function_exists('fopen') || (function_exists('ini_get') && true != ini_get('allow_url_fopen')) ) - return false; - - if ( version_compare(PHP_VERSION, '5.0', '<') ) - return false; - - //HTTPS via Proxy was added in 5.1.0 - $is_ssl = isset($args['ssl']) && $args['ssl']; - if ( $is_ssl && version_compare(PHP_VERSION, '5.1.0', '<') ) { - $proxy = new WP_HTTP_Proxy(); - /** - * No URL check, as its not currently passed to the ::test() function - * In the case where a Proxy is in use, Just bypass this transport for HTTPS. - */ - if ( $proxy->is_enabled() ) - return false; - } - - return apply_filters('use_streams_transport', true, $args); - } -} /** - * HTTP request method uses HTTP extension to retrieve the url. - * - * Requires the HTTP extension to be installed. This would be the preferred transport since it can - * handle a lot of the problems that forces the others to use the HTTP version 1.0. Even if PHP 5.2+ - * is being used, it doesn't mean that the HTTP extension will be enabled. + * Returns the initialized WP_Http Object * - * @package WordPress - * @subpackage HTTP * @since 2.7.0 - */ -class WP_Http_ExtHTTP { - /** - * Send a HTTP request to a URI using HTTP extension. - * - * Does not support non-blocking. - * - * @access public - * @since 2.7 - * - * @param string $url - * @param str|array $args Optional. Override the defaults. - * @return array 'headers', 'body', 'cookies' and 'response' keys. - */ - function request($url, $args = array()) { - $defaults = array( - 'method' => 'GET', 'timeout' => 5, - 'redirection' => 5, 'httpversion' => '1.0', - 'blocking' => true, - 'headers' => array(), 'body' => null, 'cookies' => array() - ); - - $r = wp_parse_args( $args, $defaults ); - - if ( isset($r['headers']['User-Agent']) ) { - $r['user-agent'] = $r['headers']['User-Agent']; - unset($r['headers']['User-Agent']); - } else if( isset($r['headers']['user-agent']) ) { - $r['user-agent'] = $r['headers']['user-agent']; - unset($r['headers']['user-agent']); - } - - // Construct Cookie: header if any cookies are set - WP_Http::buildCookieHeader( $r ); - - switch ( $r['method'] ) { - case 'POST': - $r['method'] = HTTP_METH_POST; - break; - case 'HEAD': - $r['method'] = HTTP_METH_HEAD; - break; - case 'GET': - default: - $r['method'] = HTTP_METH_GET; - } - - $arrURL = parse_url($url); - - if ( 'http' != $arrURL['scheme'] || 'https' != $arrURL['scheme'] ) - $url = preg_replace('|^' . preg_quote($arrURL['scheme'], '|') . '|', 'http', $url); - - $is_local = isset($args['local']) && $args['local']; - $ssl_verify = isset($args['sslverify']) && $args['sslverify']; - if ( $is_local ) - $ssl_verify = apply_filters('https_local_ssl_verify', $ssl_verify); - elseif ( ! $is_local ) - $ssl_verify = apply_filters('https_ssl_verify', $ssl_verify); - - $options = array( - 'timeout' => $r['timeout'], - 'connecttimeout' => $r['timeout'], - 'redirect' => $r['redirection'], - 'useragent' => $r['user-agent'], - 'headers' => $r['headers'], - 'ssl' => array( - 'verifypeer' => $ssl_verify, - 'verifyhost' => $ssl_verify - ) - ); - - // The HTTP extensions offers really easy proxy support. - $proxy = new WP_HTTP_Proxy(); - - if ( $proxy->is_enabled() && $proxy->send_through_proxy( $url ) ) { - $options['proxyhost'] = $proxy->host(); - $options['proxyport'] = $proxy->port(); - $options['proxytype'] = HTTP_PROXY_HTTP; - - if ( $proxy->use_authentication() ) { - $options['proxyauth'] = $proxy->authentication(); - $options['proxyauthtype'] = HTTP_AUTH_BASIC; - } - } - - if ( !defined('WP_DEBUG') || ( defined('WP_DEBUG') && false === WP_DEBUG ) ) //Emits warning level notices for max redirects and timeouts - $strResponse = @http_request($r['method'], $url, $r['body'], $options, $info); - else - $strResponse = http_request($r['method'], $url, $r['body'], $options, $info); //Emits warning level notices for max redirects and timeouts - - // Error may still be set, Response may return headers or partial document, and error - // contains a reason the request was aborted, eg, timeout expired or max-redirects reached. - if ( false === $strResponse || ! empty($info['error']) ) - return new WP_Error('http_request_failed', $info['response_code'] . ': ' . $info['error']); - - if ( ! $r['blocking'] ) - return array( 'headers' => array(), 'body' => '', 'response' => array('code' => false, 'message' => false), 'cookies' => array() ); - - list($theHeaders, $theBody) = explode("\r\n\r\n", $strResponse, 2); - $theHeaders = WP_Http::processHeaders($theHeaders); - - if ( ! empty( $theBody ) && isset( $theHeaders['headers']['transfer-encoding'] ) && 'chunked' == $theHeaders['headers']['transfer-encoding'] ) { - if ( !defined('WP_DEBUG') || ( defined('WP_DEBUG') && false === WP_DEBUG ) ) - $theBody = @http_chunked_decode($theBody); - else - $theBody = http_chunked_decode($theBody); - } - - if ( true === $r['decompress'] && true === WP_Http_Encoding::should_decode($theHeaders['headers']) ) - $theBody = http_inflate( $theBody ); - - $theResponse = array(); - $theResponse['code'] = $info['response_code']; - $theResponse['message'] = get_status_header_desc($info['response_code']); - - return array('headers' => $theHeaders['headers'], 'body' => $theBody, 'response' => $theResponse, 'cookies' => $theHeaders['cookies']); - } - - /** - * Whether this class can be used for retrieving an URL. - * - * @static - * @since 2.7.0 - * - * @return boolean False means this class can not be used, true means it can. - */ - function test($args = array()) { - return apply_filters('use_http_extension_transport', function_exists('http_request'), $args ); - } -} - -/** - * HTTP request method uses Curl extension to retrieve the url. + * @access private * - * Requires the Curl extension to be installed. + * @staticvar WP_Http $http * - * @package WordPress - * @subpackage HTTP - * @since 2.7 + * @return WP_Http HTTP Transport object. */ -class WP_Http_Curl { - - /** - * Send a HTTP request to a URI using cURL extension. - * - * @access public - * @since 2.7.0 - * - * @param string $url - * @param str|array $args Optional. Override the defaults. - * @return array 'headers', 'body', 'cookies' and 'response' keys. - */ - function request($url, $args = array()) { - $defaults = array( - 'method' => 'GET', 'timeout' => 5, - 'redirection' => 5, 'httpversion' => '1.0', - 'blocking' => true, - 'headers' => array(), 'body' => null, 'cookies' => array() - ); - - $r = wp_parse_args( $args, $defaults ); - - if ( isset($r['headers']['User-Agent']) ) { - $r['user-agent'] = $r['headers']['User-Agent']; - unset($r['headers']['User-Agent']); - } else if( isset($r['headers']['user-agent']) ) { - $r['user-agent'] = $r['headers']['user-agent']; - unset($r['headers']['user-agent']); - } - - // Construct Cookie: header if any cookies are set. - WP_Http::buildCookieHeader( $r ); - - // cURL extension will sometimes fail when the timeout is less than 1 as it may round down - // to 0, which gives it unlimited timeout. - if ( $r['timeout'] > 0 && $r['timeout'] < 1 ) - $r['timeout'] = 1; - - $handle = curl_init(); - - // cURL offers really easy proxy support. - $proxy = new WP_HTTP_Proxy(); - - if ( $proxy->is_enabled() && $proxy->send_through_proxy( $url ) ) { - - $isPHP5 = version_compare(PHP_VERSION, '5.0.0', '>='); - - if ( $isPHP5 ) { - curl_setopt( $handle, CURLOPT_PROXYTYPE, CURLPROXY_HTTP ); - curl_setopt( $handle, CURLOPT_PROXY, $proxy->host() ); - curl_setopt( $handle, CURLOPT_PROXYPORT, $proxy->port() ); - } else { - curl_setopt( $handle, CURLOPT_PROXY, $proxy->host() .':'. $proxy->port() ); - } - - if ( $proxy->use_authentication() ) { - if ( $isPHP5 ) - curl_setopt( $handle, CURLOPT_PROXYAUTH, CURLAUTH_BASIC ); - - curl_setopt( $handle, CURLOPT_PROXYUSERPWD, $proxy->authentication() ); - } - } - - $is_local = isset($args['local']) && $args['local']; - $ssl_verify = isset($args['sslverify']) && $args['sslverify']; - if ( $is_local ) - $ssl_verify = apply_filters('https_local_ssl_verify', $ssl_verify); - elseif ( ! $is_local ) - $ssl_verify = apply_filters('https_ssl_verify', $ssl_verify); - - curl_setopt( $handle, CURLOPT_URL, $url); - curl_setopt( $handle, CURLOPT_RETURNTRANSFER, true ); - curl_setopt( $handle, CURLOPT_SSL_VERIFYHOST, $ssl_verify ); - curl_setopt( $handle, CURLOPT_SSL_VERIFYPEER, $ssl_verify ); - curl_setopt( $handle, CURLOPT_USERAGENT, $r['user-agent'] ); - curl_setopt( $handle, CURLOPT_CONNECTTIMEOUT, $r['timeout'] ); - curl_setopt( $handle, CURLOPT_TIMEOUT, $r['timeout'] ); - curl_setopt( $handle, CURLOPT_MAXREDIRS, $r['redirection'] ); - - switch ( $r['method'] ) { - case 'HEAD': - curl_setopt( $handle, CURLOPT_NOBODY, true ); - break; - case 'POST': - curl_setopt( $handle, CURLOPT_POST, true ); - curl_setopt( $handle, CURLOPT_POSTFIELDS, $r['body'] ); - break; - } - - if ( true === $r['blocking'] ) - curl_setopt( $handle, CURLOPT_HEADER, true ); - else - curl_setopt( $handle, CURLOPT_HEADER, false ); - - // The option doesn't work with safe mode or when open_basedir is set. - if ( !ini_get('safe_mode') && !ini_get('open_basedir') ) - curl_setopt( $handle, CURLOPT_FOLLOWLOCATION, true ); - - if ( !empty( $r['headers'] ) ) { - // cURL expects full header strings in each element - $headers = array(); - foreach ( $r['headers'] as $name => $value ) { - $headers[] = "{$name}: $value"; - } - curl_setopt( $handle, CURLOPT_HTTPHEADER, $headers ); - } - - if ( $r['httpversion'] == '1.0' ) - curl_setopt( $handle, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_0 ); - else - curl_setopt( $handle, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1 ); - - // Cookies are not handled by the HTTP API currently. Allow for plugin authors to handle it - // themselves... Although, it is somewhat pointless without some reference. - do_action_ref_array( 'http_api_curl', array(&$handle) ); - - // We don't need to return the body, so don't. Just execute request and return. - if ( ! $r['blocking'] ) { - curl_exec( $handle ); - curl_close( $handle ); - return array( 'headers' => array(), 'body' => '', 'response' => array('code' => false, 'message' => false), 'cookies' => array() ); - } - - $theResponse = curl_exec( $handle ); - - if ( !empty($theResponse) ) { - $parts = explode("\r\n\r\n", $theResponse); - - $headerLength = curl_getinfo($handle, CURLINFO_HEADER_SIZE); - $theHeaders = trim( substr($theResponse, 0, $headerLength) ); - $theBody = substr( $theResponse, $headerLength ); - if ( false !== strrpos($theHeaders, "\r\n\r\n") ) { - $headerParts = explode("\r\n\r\n", $theHeaders); - $theHeaders = $headerParts[ count($headerParts) -1 ]; - } - $theHeaders = WP_Http::processHeaders($theHeaders); - } else { - if ( $curl_error = curl_error($handle) ) - return new WP_Error('http_request_failed', $curl_error); - if ( in_array( curl_getinfo( $handle, CURLINFO_HTTP_CODE ), array(301, 302) ) ) - return new WP_Error('http_request_failed', __('Too many redirects.')); - - $theHeaders = array( 'headers' => array(), 'cookies' => array() ); - $theBody = ''; - } - - $response = array(); - $response['code'] = curl_getinfo( $handle, CURLINFO_HTTP_CODE ); - $response['message'] = get_status_header_desc($response['code']); - - curl_close( $handle ); - - if ( true === $r['decompress'] && true === WP_Http_Encoding::should_decode($theHeaders['headers']) ) - $theBody = WP_Http_Encoding::decompress( $theBody ); +function _wp_http_get_object() { + static $http = null; - return array('headers' => $theHeaders['headers'], 'body' => $theBody, 'response' => $response, 'cookies' => $theHeaders['cookies']); - } - - /** - * Whether this class can be used for retrieving an URL. - * - * @static - * @since 2.7.0 - * - * @return boolean False means this class can not be used, true means it can. - */ - function test($args = array()) { - if ( function_exists('curl_init') && function_exists('curl_exec') ) - return apply_filters('use_curl_transport', true, $args); - - return false; + if ( is_null( $http ) ) { + $http = new WP_Http(); } + return $http; } /** - * Adds Proxy support to the WordPress HTTP API. - * - * There are caveats to proxy support. It requires that defines be made in the wp-config.php file to - * enable proxy support. There are also a few filters that plugins can hook into for some of the - * constants. - * - * The constants are as follows: - *
    - *
  1. WP_PROXY_HOST - Enable proxy support and host for connecting.
    2. - *
  2. WP_PROXY_PORT - Proxy port for connection. No default, must be defined.
    3. - *
  3. WP_PROXY_USERNAME - Proxy username, if it requires authentication.
    4. - *
  4. WP_PROXY_PASSWORD - Proxy password, if it requires authentication.
    5. - *
  5. WP_PROXY_BYPASS_HOSTS - Will prevent the hosts in this list from going through the proxy. - * You do not need to have localhost and the blog host in this list, because they will not be passed - * through the proxy. The list should be presented in a comma separated list
    6. - *
- * - * An example can be as seen below. - * - * define('WP_PROXY_HOST', '192.168.84.101'); - * define('WP_PROXY_PORT', '8080'); - * define('WP_PROXY_BYPASS_HOSTS', 'localhost, www.example.com'); - * - * - * @link http://core.trac.wordpress.org/ticket/4011 Proxy support ticket in WordPress. - * @since 2.8 - */ -class WP_HTTP_Proxy { - - /** - * Whether proxy connection should be used. - * - * @since 2.8 - * @use WP_PROXY_HOST - * @use WP_PROXY_PORT - * - * @return bool - */ - function is_enabled() { - return defined('WP_PROXY_HOST') && defined('WP_PROXY_PORT'); - } - - /** - * Whether authentication should be used. - * - * @since 2.8 - * @use WP_PROXY_USERNAME - * @use WP_PROXY_PASSWORD - * - * @return bool - */ - function use_authentication() { - return defined('WP_PROXY_USERNAME') && defined('WP_PROXY_PASSWORD'); - } - - /** - * Retrieve the host for the proxy server. - * - * @since 2.8 - * - * @return string - */ - function host() { - if ( defined('WP_PROXY_HOST') ) - return WP_PROXY_HOST; - - return ''; - } - - /** - * Retrieve the port for the proxy server. - * - * @since 2.8 - * - * @return string - */ - function port() { - if ( defined('WP_PROXY_PORT') ) - return WP_PROXY_PORT; - - return ''; - } - - /** - * Retrieve the username for proxy authentication. - * - * @since 2.8 - * - * @return string - */ - function username() { - if ( defined('WP_PROXY_USERNAME') ) - return WP_PROXY_USERNAME; - - return ''; - } - - /** - * Retrieve the password for proxy authentication. - * - * @since 2.8 - * - * @return string - */ - function password() { - if ( defined('WP_PROXY_PASSWORD') ) - return WP_PROXY_PASSWORD; - - return ''; - } - - /** - * Retrieve authentication string for proxy authentication. - * - * @since 2.8 - * - * @return string - */ - function authentication() { - return $this->username() . ':' . $this->password(); - } - - /** - * Retrieve header string for proxy authentication. - * - * @since 2.8 - * - * @return string - */ - function authentication_header() { - return 'Proxy-Authentication: Basic ' . base64_encode( $this->authentication() ); - } - - /** - * Whether URL should be sent through the proxy server. - * - * We want to keep localhost and the blog URL from being sent through the proxy server, because - * some proxies can not handle this. We also have the constant available for defining other - * hosts that won't be sent through the proxy. - * - * @uses WP_PROXY_BYPASS_HOSTS - * @since unknown - * - * @param string $uri URI to check. - * @return bool True, to send through the proxy and false if, the proxy should not be used. - */ - function send_through_proxy( $uri ) { - // parse_url() only handles http, https type URLs, and will emit E_WARNING on failure. - // This will be displayed on blogs, which is not reasonable. - $check = @parse_url($uri); - - // Malformed URL, can not process, but this could mean ssl, so let through anyway. - if ( $check === false ) - return true; - - $home = parse_url( get_option('siteurl') ); - - if ( $check['host'] == 'localhost' || $check['host'] == $home['host'] ) - return false; - - if ( !defined('WP_PROXY_BYPASS_HOSTS') ) - return true; - - static $bypass_hosts; - if ( null == $bypass_hosts ) - $bypass_hosts = preg_split('|,\s*|', WP_PROXY_BYPASS_HOSTS); - - return !in_array( $check['host'], $bypass_hosts ); - } -} -/** - * Internal representation of a single cookie. + * Retrieve the raw response from a safe HTTP request. * - * Returned cookies are represented using this class, and when cookies are set, if they are not - * already a WP_Http_Cookie() object, then they are turned into one. + * This function is ideal when the HTTP request is being made to an arbitrary + * URL. The URL is validated to avoid redirection and request forgery attacks. * - * @todo The WordPress convention is to use underscores instead of camelCase for function and method - * names. Need to switch to use underscores instead for the methods. - * - * @package WordPress - * @subpackage HTTP - * @since 2.8.0 - * @author Beau Lebens - */ -class WP_Http_Cookie { - - /** - * Cookie name. - * - * @since 2.8.0 - * @var string - */ - var $name; - - /** - * Cookie value. - * - * @since 2.8.0 - * @var string - */ - var $value; - - /** - * When the cookie expires. - * - * @since 2.8.0 - * @var string - */ - var $expires; - - /** - * Cookie URL path. - * - * @since 2.8.0 - * @var string - */ - var $path; - - /** - * Cookie Domain. - * - * @since 2.8.0 - * @var string - */ - var $domain; - - /** - * PHP4 style Constructor - Calls PHP5 Style Constructor. - * - * @access public - * @since 2.8.0 - * @param string|array $data Raw cookie data. - */ - function WP_Http_Cookie( $data ) { - $this->__construct( $data ); - } - - /** - * Sets up this cookie object. - * - * The parameter $data should be either an associative array containing the indices names below - * or a header string detailing it. - * - * If it's an array, it should include the following elements: - *
    - *
  1. Name
    2. - *
  2. Value - should NOT be urlencoded already.
    3. - *
  3. Expires - (optional) String or int (UNIX timestamp).
    4. - *
  4. Path (optional)
    5. - *
  5. Domain (optional)
    6. - *
- * - * @access public - * @since 2.8.0 - * - * @param string|array $data Raw cookie data. - */ - function __construct( $data ) { - if ( is_string( $data ) ) { - // Assume it's a header string direct from a previous request - $pairs = explode( ';', $data ); - - // Special handling for first pair; name=value. Also be careful of "=" in value - $name = trim( substr( $pairs[0], 0, strpos( $pairs[0], '=' ) ) ); - $value = substr( $pairs[0], strpos( $pairs[0], '=' ) + 1 ); - $this->name = $name; - $this->value = urldecode( $value ); - array_shift( $pairs ); //Removes name=value from items. - - // Set everything else as a property - foreach ( $pairs as $pair ) { - if ( empty($pair) ) //Handles the cookie ending in ; which results in a empty final pair - continue; - - list( $key, $val ) = explode( '=', $pair ); - $key = strtolower( trim( $key ) ); - if ( 'expires' == $key ) - $val = strtotime( $val ); - $this->$key = $val; - } - } else { - if ( !isset( $data['name'] ) ) - return false; - - // Set properties based directly on parameters - $this->name = $data['name']; - $this->value = isset( $data['value'] ) ? $data['value'] : ''; - $this->path = isset( $data['path'] ) ? $data['path'] : ''; - $this->domain = isset( $data['domain'] ) ? $data['domain'] : ''; - - if ( isset( $data['expires'] ) ) - $this->expires = is_int( $data['expires'] ) ? $data['expires'] : strtotime( $data['expires'] ); - else - $this->expires = null; - } - } - - /** - * Confirms that it's OK to send this cookie to the URL checked against. - * - * Decision is based on RFC 2109/2965, so look there for details on validity. - * - * @access public - * @since 2.8.0 - * - * @param string $url URL you intend to send this cookie to - * @return boolean TRUE if allowed, FALSE otherwise. - */ - function test( $url ) { - // Expires - if expired then nothing else matters - if ( time() > $this->expires ) - return false; - - // Get details on the URL we're thinking about sending to - $url = parse_url( $url ); - $url['port'] = isset( $url['port'] ) ? $url['port'] : 80; - $url['path'] = isset( $url['path'] ) ? $url['path'] : '/'; - - // Values to use for comparison against the URL - $path = isset( $this->path ) ? $this->path : '/'; - $port = isset( $this->port ) ? $this->port : 80; - $domain = isset( $this->domain ) ? strtolower( $this->domain ) : strtolower( $url['host'] ); - if ( false === stripos( $domain, '.' ) ) - $domain .= '.local'; - - // Host - very basic check that the request URL ends with the domain restriction (minus leading dot) - $domain = substr( $domain, 0, 1 ) == '.' ? substr( $domain, 1 ) : $domain; - if ( substr( $url['host'], -strlen( $domain ) ) != $domain ) - return false; - - // Port - supports "port-lists" in the format: "80,8000,8080" - if ( !in_array( $url['port'], explode( ',', $port) ) ) - return false; - - // Path - request path must start with path restriction - if ( substr( $url['path'], 0, strlen( $path ) ) != $path ) - return false; - - return true; - } - - /** - * Convert cookie name and value back to header string. - * - * @access public - * @since 2.8.0 - * - * @return string Header encoded cookie name and value. - */ - function getHeaderValue() { - if ( empty( $this->name ) || empty( $this->value ) ) - return ''; - - return $this->name . '=' . urlencode( $this->value ); - } - - /** - * Retrieve cookie header for usage in the rest of the WordPress HTTP API. - * - * @access public - * @since 2.8.0 - * - * @return string - */ - function getFullHeader() { - return 'Cookie: ' . $this->getHeaderValue(); - } + * @since 3.6.0 + * + * @see wp_remote_request() For more information on the response array format. + * @see WP_Http::request() For default arguments information. + * + * @param string $url Site URL to retrieve. + * @param array $args Optional. Request arguments. Default empty array. + * @return WP_Error|array The response or WP_Error on failure. + */ +function wp_safe_remote_request( $url, $args = array() ) { + $args['reject_unsafe_urls'] = true; + $http = _wp_http_get_object(); + return $http->request( $url, $args ); } /** - * Implementation for deflate and gzip transfer encodings. + * Retrieve the raw response from a safe HTTP request using the GET method. * - * Includes RFC 1950, RFC 1951, and RFC 1952. + * This function is ideal when the HTTP request is being made to an arbitrary + * URL. The URL is validated to avoid redirection and request forgery attacks. * - * @since 2.8 - * @package WordPress - * @subpackage HTTP + * @since 3.6.0 + * + * @see wp_remote_request() For more information on the response array format. + * @see WP_Http::request() For default arguments information. + * + * @param string $url Site URL to retrieve. + * @param array $args Optional. Request arguments. Default empty array. + * @return WP_Error|array The response or WP_Error on failure. */ -class WP_Http_Encoding { - - /** - * Compress raw string using the deflate format. - * - * Supports the RFC 1951 standard. - * - * @since 2.8 - * - * @param string $raw String to compress. - * @param int $level Optional, default is 9. Compression level, 9 is highest. - * @param string $supports Optional, not used. When implemented it will choose the right compression based on what the server supports. - * @return string|bool False on failure. - */ - function compress( $raw, $level = 9, $supports = null ) { - return gzdeflate( $raw, $level ); - } - - /** - * Decompression of deflated string. - * - * Will attempt to decompress using the RFC 1950 standard, and if that fails - * then the RFC 1951 standard deflate will be attempted. Finally, the RFC - * 1952 standard gzip decode will be attempted. If all fail, then the - * original compressed string will be returned. - * - * @since 2.8 - * - * @param string $compressed String to decompress. - * @param int $length The optional length of the compressed data. - * @return string|bool False on failure. - */ - function decompress( $compressed, $length = null ) { - $decompressed = gzinflate( $compressed ); - - if ( false !== $decompressed ) - return $decompressed; - - $decompressed = gzuncompress( $compressed ); - - if ( false !== $decompressed ) - return $decompressed; - - if ( function_exists('gzdecode') ) { - $decompressed = gzdecode( $compressed ); - - if ( false !== $decompressed ) - return $decompressed; - } - - return $compressed; - } - - /** - * What encoding types to accept and their priority values. - * - * @since 2.8 - * - * @return string Types of encoding to accept. - */ - function accept_encoding() { - $type = array(); - if ( function_exists( 'gzinflate' ) ) - $type[] = 'deflate;q=1.0'; - - if ( function_exists( 'gzuncompress' ) ) - $type[] = 'compress;q=0.5'; - - if ( function_exists( 'gzdecode' ) ) - $type[] = 'gzip;q=0.5'; - - return implode(', ', $type); - } - - /** - * What enconding the content used when it was compressed to send in the headers. - * - * @since 2.8 - * - * @return string Content-Encoding string to send in the header. - */ - function content_encoding() { - return 'deflate'; - } - - /** - * Whether the content be decoded based on the headers. - * - * @since 2.8 - * - * @param array|string $headers All of the available headers. - * @return bool - */ - function should_decode($headers) { - if ( is_array( $headers ) ) { - if ( array_key_exists('content-encoding', $headers) && ! empty( $headers['content-encoding'] ) ) - return true; - } else if( is_string( $headers ) ) { - return ( stripos($headers, 'content-encoding:') !== false ); - } - - return false; - } - - /** - * Whether decompression and compression are supported by the PHP version. - * - * Each function is tested instead of checking for the zlib extension, to - * ensure that the functions all exist in the PHP version and aren't - * disabled. - * - * @since 2.8 - * - * @return bool - */ - function is_available() { - return ( function_exists('gzuncompress') || function_exists('gzdeflate') || function_exists('gzinflate') ); - } +function wp_safe_remote_get( $url, $args = array() ) { + $args['reject_unsafe_urls'] = true; + $http = _wp_http_get_object(); + return $http->get( $url, $args ); } /** - * Returns the initialized WP_Http Object + * Retrieve the raw response from a safe HTTP request using the POST method. * - * @since 2.7.0 - * @access private + * This function is ideal when the HTTP request is being made to an arbitrary + * URL. The URL is validated to avoid redirection and request forgery attacks. * - * @return WP_Http HTTP Transport object. + * @since 3.6.0 + * + * @see wp_remote_request() For more information on the response array format. + * @see WP_Http::request() For default arguments information. + * + * @param string $url Site URL to retrieve. + * @param array $args Optional. Request arguments. Default empty array. + * @return WP_Error|array The response or WP_Error on failure. */ -function &_wp_http_get_object() { - static $http; - - if ( is_null($http) ) - $http = new WP_Http(); +function wp_safe_remote_post( $url, $args = array() ) { + $args['reject_unsafe_urls'] = true; + $http = _wp_http_get_object(); + return $http->post( $url, $args ); +} - return $http; +/** + * Retrieve the raw response from a safe HTTP request using the HEAD method. + * + * This function is ideal when the HTTP request is being made to an arbitrary + * URL. The URL is validated to avoid redirection and request forgery attacks. + * + * @since 3.6.0 + * + * @see wp_remote_request() For more information on the response array format. + * @see WP_Http::request() For default arguments information. + * + * @param string $url Site URL to retrieve. + * @param array $args Optional. Request arguments. Default empty array. + * @return WP_Error|array The response or WP_Error on failure. + */ +function wp_safe_remote_head( $url, $args = array() ) { + $args['reject_unsafe_urls'] = true; + $http = _wp_http_get_object(); + return $http->head( $url, $args ); } /** * Retrieve the raw response from the HTTP request. * - * The array structure is a little complex. + * The array structure is a little complex: * - * - * $res = array( 'headers' => array(), 'response' => array('code' => int, 'message' => string) ); - * + * $res = array( + * 'headers' => array(), + * 'response' => array( + * 'code' => int, + * 'message' => string + * ) + * ); * * All of the headers in $res['headers'] are with the name as the key and the * value as the value. So to get the User-Agent, you would do the following. * - * - * $user_agent = $res['headers']['user-agent']; - * + * $user_agent = $res['headers']['user-agent']; * * The body is the raw response content and can be retrieved from $res['body']. * * This function is called first to make the request and there are other API * functions to abstract out the above convoluted setup. * + * Request method defaults for helper functions: + * - Default 'GET' for wp_remote_get() + * - Default 'POST' for wp_remote_post() + * - Default 'HEAD' for wp_remote_head() + * * @since 2.7.0 * - * @param string $url Site URL to retrieve. - * @param array $args Optional. Override the defaults. + * @see WP_Http::request() For additional information on default arguments. + * + * @param string $url Site URL to retrieve. + * @param array $args Optional. Request arguments. Default empty array. * @return WP_Error|array The response or WP_Error on failure. */ function wp_remote_request($url, $args = array()) { - $objFetchSite = _wp_http_get_object(); - return $objFetchSite->request($url, $args); + $http = _wp_http_get_object(); + return $http->request( $url, $args ); } /** * Retrieve the raw response from the HTTP request using the GET method. * - * @see wp_remote_request() For more information on the response array format. - * * @since 2.7.0 * - * @param string $url Site URL to retrieve. - * @param array $args Optional. Override the defaults. + * @see wp_remote_request() For more information on the response array format. + * @see WP_Http::request() For default arguments information. + * + * @param string $url Site URL to retrieve. + * @param array $args Optional. Request arguments. Default empty array. * @return WP_Error|array The response or WP_Error on failure. */ function wp_remote_get($url, $args = array()) { - $objFetchSite = _wp_http_get_object(); - return $objFetchSite->get($url, $args); + $http = _wp_http_get_object(); + return $http->get( $url, $args ); } /** * Retrieve the raw response from the HTTP request using the POST method. * - * @see wp_remote_request() For more information on the response array format. - * * @since 2.7.0 * - * @param string $url Site URL to retrieve. - * @param array $args Optional. Override the defaults. + * @see wp_remote_request() For more information on the response array format. + * @see WP_Http::request() For default arguments information. + * + * @param string $url Site URL to retrieve. + * @param array $args Optional. Request arguments. Default empty array. * @return WP_Error|array The response or WP_Error on failure. */ function wp_remote_post($url, $args = array()) { - $objFetchSite = _wp_http_get_object(); - return $objFetchSite->post($url, $args); + $http = _wp_http_get_object(); + return $http->post( $url, $args ); } /** * Retrieve the raw response from the HTTP request using the HEAD method. * - * @see wp_remote_request() For more information on the response array format. - * * @since 2.7.0 * - * @param string $url Site URL to retrieve. - * @param array $args Optional. Override the defaults. + * @see wp_remote_request() For more information on the response array format. + * @see WP_Http::request() For default arguments information. + * + * @param string $url Site URL to retrieve. + * @param array $args Optional. Request arguments. Default empty array. * @return WP_Error|array The response or WP_Error on failure. */ function wp_remote_head($url, $args = array()) { - $objFetchSite = _wp_http_get_object(); - return $objFetchSite->head($url, $args); + $http = _wp_http_get_object(); + return $http->head( $url, $args ); } /** @@ -1976,7 +212,7 @@ function wp_remote_head($url, $args = array()) { * @param array $response HTTP response. * @return array The headers of the response. Empty array if incorrect parameter given. */ -function wp_remote_retrieve_headers(&$response) { +function wp_remote_retrieve_headers( $response ) { if ( is_wp_error($response) || ! isset($response['headers']) || ! is_array($response['headers'])) return array(); @@ -1988,11 +224,11 @@ function wp_remote_retrieve_headers(&$response) { * * @since 2.7.0 * - * @param array $response + * @param array $response * @param string $header Header name to retrieve value from. - * @return string The header value. Empty string on if incorrect parameter given, or if the header doesnt exist. + * @return string The header value. Empty string on if incorrect parameter given, or if the header doesn't exist. */ -function wp_remote_retrieve_header(&$response, $header) { +function wp_remote_retrieve_header( $response, $header ) { if ( is_wp_error($response) || ! isset($response['headers']) || ! is_array($response['headers'])) return ''; @@ -2010,9 +246,9 @@ function wp_remote_retrieve_header(&$response, $header) { * @since 2.7.0 * * @param array $response HTTP response. - * @return string the response code. Empty string on incorrect parameter given. + * @return int|string The response code as an integer. Empty string on incorrect parameter given. */ -function wp_remote_retrieve_response_code(&$response) { +function wp_remote_retrieve_response_code( $response ) { if ( is_wp_error($response) || ! isset($response['response']) || ! is_array($response['response'])) return ''; @@ -2029,7 +265,7 @@ function wp_remote_retrieve_response_code(&$response) { * @param array $response HTTP response. * @return string The response message. Empty string on incorrect parameter given. */ -function wp_remote_retrieve_response_message(&$response) { +function wp_remote_retrieve_response_message( $response ) { if ( is_wp_error($response) || ! isset($response['response']) || ! is_array($response['response'])) return ''; @@ -2044,11 +280,383 @@ function wp_remote_retrieve_response_message(&$response) { * @param array $response HTTP response. * @return string The body of the response. Empty string if no body or incorrect parameter given. */ -function wp_remote_retrieve_body(&$response) { +function wp_remote_retrieve_body( $response ) { if ( is_wp_error($response) || ! isset($response['body']) ) return ''; return $response['body']; } -?> +/** + * Retrieve only the body from the raw response. + * + * @since 4.4.0 + * + * @param array $response HTTP response. + * @return array An array of `WP_Http_Cookie` objects from the response. Empty array if there are none, or the response is a WP_Error. + */ +function wp_remote_retrieve_cookies( $response ) { + if ( is_wp_error( $response ) || empty( $response['cookies'] ) ) { + return array(); + } + + return $response['cookies']; +} + +/** + * Retrieve a single cookie by name from the raw response. + * + * @since 4.4.0 + * + * @param array $response HTTP response. + * @param string $name The name of the cookie to retrieve. + * @return WP_Http_Cookie|string The `WP_Http_Cookie` object. Empty string if the cookie isn't present in the response. + */ +function wp_remote_retrieve_cookie( $response, $name ) { + $cookies = wp_remote_retrieve_cookies( $response ); + + if ( empty( $cookies ) ) { + return ''; + } + + foreach ( $cookies as $cookie ) { + if ( $cookie->name === $name ) { + return $cookie; + } + } + + return ''; +} + +/** + * Retrieve a single cookie's value by name from the raw response. + * + * @since 4.4.0 + * + * @param array $response HTTP response. + * @param string $name The name of the cookie to retrieve. + * @return string The value of the cookie. Empty string if the cookie isn't present in the response. + */ +function wp_remote_retrieve_cookie_value( $response, $name ) { + $cookie = wp_remote_retrieve_cookie( $response, $name ); + + if ( ! is_a( $cookie, 'WP_Http_Cookie' ) ) { + return ''; + } + + return $cookie->value; +} + +/** + * Determines if there is an HTTP Transport that can process this request. + * + * @since 3.2.0 + * + * @param array $capabilities Array of capabilities to test or a wp_remote_request() $args array. + * @param string $url Optional. If given, will check if the URL requires SSL and adds + * that requirement to the capabilities array. + * + * @return bool + */ +function wp_http_supports( $capabilities = array(), $url = null ) { + $http = _wp_http_get_object(); + + $capabilities = wp_parse_args( $capabilities ); + + $count = count( $capabilities ); + + // If we have a numeric $capabilities array, spoof a wp_remote_request() associative $args array + if ( $count && count( array_filter( array_keys( $capabilities ), 'is_numeric' ) ) == $count ) { + $capabilities = array_combine( array_values( $capabilities ), array_fill( 0, $count, true ) ); + } + + if ( $url && !isset( $capabilities['ssl'] ) ) { + $scheme = parse_url( $url, PHP_URL_SCHEME ); + if ( 'https' == $scheme || 'ssl' == $scheme ) { + $capabilities['ssl'] = true; + } + } + + return (bool) $http->_get_first_available_transport( $capabilities ); +} + +/** + * Get the HTTP Origin of the current request. + * + * @since 3.4.0 + * + * @return string URL of the origin. Empty string if no origin. + */ +function get_http_origin() { + $origin = ''; + if ( ! empty ( $_SERVER[ 'HTTP_ORIGIN' ] ) ) + $origin = $_SERVER[ 'HTTP_ORIGIN' ]; + + /** + * Change the origin of an HTTP request. + * + * @since 3.4.0 + * + * @param string $origin The original origin for the request. + */ + return apply_filters( 'http_origin', $origin ); +} + +/** + * Retrieve list of allowed HTTP origins. + * + * @since 3.4.0 + * + * @return array Array of origin URLs. + */ +function get_allowed_http_origins() { + $admin_origin = parse_url( admin_url() ); + $home_origin = parse_url( home_url() ); + + // @todo preserve port? + $allowed_origins = array_unique( array( + 'http://' . $admin_origin[ 'host' ], + 'https://' . $admin_origin[ 'host' ], + 'http://' . $home_origin[ 'host' ], + 'https://' . $home_origin[ 'host' ], + ) ); + + /** + * Change the origin types allowed for HTTP requests. + * + * @since 3.4.0 + * + * @param array $allowed_origins { + * Default allowed HTTP origins. + * @type string Non-secure URL for admin origin. + * @type string Secure URL for admin origin. + * @type string Non-secure URL for home origin. + * @type string Secure URL for home origin. + * } + */ + return apply_filters( 'allowed_http_origins' , $allowed_origins ); +} + +/** + * Determines if the HTTP origin is an authorized one. + * + * @since 3.4.0 + * + * @param null|string $origin Origin URL. If not provided, the value of get_http_origin() is used. + * @return string True if the origin is allowed. False otherwise. + */ +function is_allowed_http_origin( $origin = null ) { + $origin_arg = $origin; + + if ( null === $origin ) + $origin = get_http_origin(); + + if ( $origin && ! in_array( $origin, get_allowed_http_origins() ) ) + $origin = ''; + + /** + * Change the allowed HTTP origin result. + * + * @since 3.4.0 + * + * @param string $origin Result of check for allowed origin. + * @param string $origin_arg Original origin string passed into is_allowed_http_origin function. + */ + return apply_filters( 'allowed_http_origin', $origin, $origin_arg ); +} + +/** + * Send Access-Control-Allow-Origin and related headers if the current request + * is from an allowed origin. + * + * If the request is an OPTIONS request, the script exits with either access + * control headers sent, or a 403 response if the origin is not allowed. For + * other request methods, you will receive a return value. + * + * @since 3.4.0 + * + * @return string|false Returns the origin URL if headers are sent. Returns false + * if headers are not sent. + */ +function send_origin_headers() { + $origin = get_http_origin(); + + if ( is_allowed_http_origin( $origin ) ) { + @header( 'Access-Control-Allow-Origin: ' . $origin ); + @header( 'Access-Control-Allow-Credentials: true' ); + if ( 'OPTIONS' === $_SERVER['REQUEST_METHOD'] ) + exit; + return $origin; + } + + if ( 'OPTIONS' === $_SERVER['REQUEST_METHOD'] ) { + status_header( 403 ); + exit; + } + + return false; +} + +/** + * Validate a URL for safe use in the HTTP API. + * + * @since 3.5.2 + * + * @param string $url + * @return false|string URL or false on failure. + */ +function wp_http_validate_url( $url ) { + $original_url = $url; + $url = wp_kses_bad_protocol( $url, array( 'http', 'https' ) ); + if ( ! $url || strtolower( $url ) !== strtolower( $original_url ) ) + return false; + + $parsed_url = @parse_url( $url ); + if ( ! $parsed_url || empty( $parsed_url['host'] ) ) + return false; + + if ( isset( $parsed_url['user'] ) || isset( $parsed_url['pass'] ) ) + return false; + + if ( false !== strpbrk( $parsed_url['host'], ':#?[]' ) ) + return false; + + $parsed_home = @parse_url( get_option( 'home' ) ); + + $same_host = strtolower( $parsed_home['host'] ) === strtolower( $parsed_url['host'] ); + + if ( ! $same_host ) { + $host = trim( $parsed_url['host'], '.' ); + if ( preg_match( '#^\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}$#', $host ) ) { + $ip = $host; + } else { + $ip = gethostbyname( $host ); + if ( $ip === $host ) // Error condition for gethostbyname() + $ip = false; + } + if ( $ip ) { + $parts = array_map( 'intval', explode( '.', $ip ) ); + if ( 127 === $parts[0] || 10 === $parts[0] || 0 === $parts[0] + || ( 172 === $parts[0] && 16 <= $parts[1] && 31 >= $parts[1] ) + || ( 192 === $parts[0] && 168 === $parts[1] ) + ) { + // If host appears local, reject unless specifically allowed. + /** + * Check if HTTP request is external or not. + * + * Allows to change and allow external requests for the HTTP request. + * + * @since 3.6.0 + * + * @param bool false Whether HTTP request is external or not. + * @param string $host IP of the requested host. + * @param string $url URL of the requested host. + */ + if ( ! apply_filters( 'http_request_host_is_external', false, $host, $url ) ) + return false; + } + } + } + + if ( empty( $parsed_url['port'] ) ) + return $url; + + $port = $parsed_url['port']; + if ( 80 === $port || 443 === $port || 8080 === $port ) + return $url; + + if ( $parsed_home && $same_host && isset( $parsed_home['port'] ) && $parsed_home['port'] === $port ) + return $url; + + return false; +} + +/** + * Whitelists allowed redirect hosts for safe HTTP requests as well. + * + * Attached to the http_request_host_is_external filter. + * + * @since 3.6.0 + * + * @param bool $is_external + * @param string $host + * @return bool + */ +function allowed_http_request_hosts( $is_external, $host ) { + if ( ! $is_external && wp_validate_redirect( 'http://' . $host ) ) + $is_external = true; + return $is_external; +} + +/** + * Whitelists any domain in a multisite installation for safe HTTP requests. + * + * Attached to the http_request_host_is_external filter. + * + * @since 3.6.0 + * + * @global wpdb $wpdb WordPress database abstraction object. + * @staticvar array $queried + * + * @param bool $is_external + * @param string $host + * @return bool + */ +function ms_allowed_http_request_hosts( $is_external, $host ) { + global $wpdb; + static $queried = array(); + if ( $is_external ) + return $is_external; + if ( $host === get_current_site()->domain ) + return true; + if ( isset( $queried[ $host ] ) ) + return $queried[ $host ]; + $queried[ $host ] = (bool) $wpdb->get_var( $wpdb->prepare( "SELECT domain FROM $wpdb->blogs WHERE domain = %s LIMIT 1", $host ) ); + return $queried[ $host ]; +} + +/** + * A wrapper for PHP's parse_url() function that handles edgecases in < PHP 5.4.7 + * + * PHP 5.4.7 expanded parse_url()'s ability to handle non-absolute url's, including + * schemeless and relative url's with :// in the path, this works around those + * limitations providing a standard output on PHP 5.2~5.4+. + * + * Error suppression is used as prior to PHP 5.3.3, an E_WARNING would be generated + * when URL parsing failed. + * + * @since 4.4.0 + * + * @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. + */ +function wp_parse_url( $url ) { + $parts = @parse_url( $url ); + if ( ! $parts ) { + // < PHP 5.4.7 compat, trouble with relative paths including a scheme break in the path + if ( '/' == $url[0] && false !== strpos( $url, '://' ) ) { + // Since we know it's a relative path, prefix with a scheme/host placeholder and try again + if ( ! $parts = @parse_url( 'placeholder://placeholder' . $url ) ) { + return $parts; + } + // Remove the placeholder values + unset( $parts['scheme'], $parts['host'] ); + } else { + return $parts; + } + } + + // < PHP 5.4.7 compat, doesn't detect schemeless URL's host field + if ( '//' == substr( $url, 0, 2 ) && ! isset( $parts['host'] ) ) { + $path_parts = explode( '/', substr( $parts['path'], 2 ), 2 ); + $parts['host'] = $path_parts[0]; + if ( isset( $path_parts[1] ) ) { + $parts['path'] = '/' . $path_parts[1]; + } else { + unset( $parts['path'] ); + } + } + + return $parts; +}