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/wp-includes/class-http.php

https://bitbucket.org/abnopanda/wordpress
PHP | 1791 lines | 835 code | 268 blank | 688 comment | 279 complexity | d767f21b4556fcad45b3066b586685c3 MD5 | raw file

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   1<?php
   2/**
   3 * Simple and uniform HTTP request API.
   4 *
   5 * Standardizes the HTTP requests for WordPress. Handles cookies, gzip encoding and decoding, chunk
   6 * decoding, if HTTP 1.1 and various other difficult HTTP protocol implementations.
   7 *
   8 * @link http://trac.wordpress.org/ticket/4779 HTTP API Proposal
   9 *
  10 * @package WordPress
  11 * @subpackage HTTP
  12 * @since 2.7.0
  13 */
  14
  15/**
  16 * WordPress HTTP Class for managing HTTP Transports and making HTTP requests.
  17 *
  18 * This class is called for the functionality of making HTTP requests and replaces Snoopy
  19 * functionality. There is no available functionality to add HTTP transport implementations, since
  20 * most of the HTTP transports are added and available for use.
  21 *
  22 * There are no properties, because none are needed and for performance reasons. Some of the
  23 * functions are static and while they do have some overhead over functions in PHP4, the purpose is
  24 * maintainability. When PHP5 is finally the requirement, it will be easy to add the static keyword
  25 * to the code. It is not as easy to convert a function to a method after enough code uses the old
  26 * way.
  27 *
  28 * Debugging includes several actions, which pass different variables for debugging the HTTP API.
  29 *
  30 * @package WordPress
  31 * @subpackage HTTP
  32 * @since 2.7.0
  33 */
  34class WP_Http {
  35
  36	/**
  37	 * Send a HTTP request to a URI.
  38	 *
  39	 * The body and headers are part of the arguments. The 'body' argument is for the body and will
  40	 * accept either a string or an array. The 'headers' argument should be an array, but a string
  41	 * is acceptable. If the 'body' argument is an array, then it will automatically be escaped
  42	 * using http_build_query().
  43	 *
  44	 * The only URI that are supported in the HTTP Transport implementation are the HTTP and HTTPS
  45	 * protocols. HTTP and HTTPS are assumed so the server might not know how to handle the send
  46	 * headers. Other protocols are unsupported and most likely will fail.
  47	 *
  48	 * The defaults are 'method', 'timeout', 'redirection', 'httpversion', 'blocking' and
  49	 * 'user-agent'.
  50	 *
  51	 * Accepted 'method' values are 'GET', 'POST', and 'HEAD', some transports technically allow
  52	 * others, but should not be assumed. The 'timeout' is used to sent how long the connection
  53	 * should stay open before failing when no response. 'redirection' is used to track how many
  54	 * redirects were taken and used to sent the amount for other transports, but not all transports
  55	 * accept setting that value.
  56	 *
  57	 * The 'httpversion' option is used to sent the HTTP version and accepted values are '1.0', and
  58	 * '1.1' and should be a string. Version 1.1 is not supported, because of chunk response. The
  59	 * 'user-agent' option is the user-agent and is used to replace the default user-agent, which is
  60	 * 'WordPress/WP_Version', where WP_Version is the value from $wp_version.
  61	 *
  62	 * 'blocking' is the default, which is used to tell the transport, whether it should halt PHP
  63	 * while it performs the request or continue regardless. Actually, that isn't entirely correct.
  64	 * Blocking mode really just means whether the fread should just pull what it can whenever it
  65	 * gets bytes or if it should wait until it has enough in the buffer to read or finishes reading
  66	 * the entire content. It doesn't actually always mean that PHP will continue going after making
  67	 * the request.
  68	 *
  69	 * @access public
  70	 * @since 2.7.0
  71	 * @todo Refactor this code. The code in this method extends the scope of its original purpose
  72	 *		and should be refactored to allow for cleaner abstraction and reduce duplication of the
  73	 *		code. One suggestion is to create a class specifically for the arguments, however
  74	 *		preliminary refactoring to this affect has affect more than just the scope of the
  75	 *		arguments. Something to ponder at least.
  76	 *
  77	 * @param string $url URI resource.
  78	 * @param str|array $args Optional. Override the defaults.
  79	 * @return array|object Array containing 'headers', 'body', 'response', 'cookies', 'filename'. A WP_Error instance upon error
  80	 */
  81	function request( $url, $args = array() ) {
  82		global $wp_version;
  83
  84		$defaults = array(
  85			'method' => 'GET',
  86			'timeout' => apply_filters( 'http_request_timeout', 5),
  87			'redirection' => apply_filters( 'http_request_redirection_count', 5),
  88			'httpversion' => apply_filters( 'http_request_version', '1.0'),
  89			'user-agent' => apply_filters( 'http_headers_useragent', 'WordPress/' . $wp_version . '; ' . get_bloginfo( 'url' )  ),
  90			'blocking' => true,
  91			'headers' => array(),
  92			'cookies' => array(),
  93			'body' => null,
  94			'compress' => false,
  95			'decompress' => true,
  96			'sslverify' => true,
  97			'stream' => false,
  98			'filename' => null
  99		);
 100
 101		// Pre-parse for the HEAD checks.
 102		$args = wp_parse_args( $args );
 103
 104		// By default, Head requests do not cause redirections.
 105		if ( isset($args['method']) && 'HEAD' == $args['method'] )
 106			$defaults['redirection'] = 0;
 107
 108		$r = wp_parse_args( $args, $defaults );
 109		$r = apply_filters( 'http_request_args', $r, $url );
 110
 111		// Certain classes decrement this, store a copy of the original value for loop purposes.
 112		$r['_redirection'] = $r['redirection'];
 113
 114		// Allow plugins to short-circuit the request
 115		$pre = apply_filters( 'pre_http_request', false, $r, $url );
 116		if ( false !== $pre )
 117			return $pre;
 118
 119		$arrURL = parse_url( $url );
 120
 121		if ( empty( $url ) || empty( $arrURL['scheme'] ) )
 122			return new WP_Error('http_request_failed', __('A valid URL was not provided.'));
 123
 124		if ( $this->block_request( $url ) )
 125			return new WP_Error( 'http_request_failed', __( 'User has blocked requests through HTTP.' ) );
 126
 127		// Determine if this is a https call and pass that on to the transport functions
 128		// so that we can blacklist the transports that do not support ssl verification
 129		$r['ssl'] = $arrURL['scheme'] == 'https' || $arrURL['scheme'] == 'ssl';
 130
 131		// Determine if this request is to OUR install of WordPress
 132		$homeURL = parse_url( get_bloginfo( 'url' ) );
 133		$r['local'] = $homeURL['host'] == $arrURL['host'] || 'localhost' == $arrURL['host'];
 134		unset( $homeURL );
 135
 136		// If we are streaming to a file but no filename was given drop it in the WP temp dir
 137		// and pick it's name using the basename of the $url
 138		if ( $r['stream']  && empty( $r['filename'] ) )
 139			$r['filename'] = get_temp_dir() . basename( $url );
 140
 141		// Force some settings if we are streaming to a file and check for existence and perms of destination directory
 142		if ( $r['stream'] ) {
 143			$r['blocking'] = true;
 144			if ( ! is_writable( dirname( $r['filename'] ) ) )
 145				return new WP_Error( 'http_request_failed', __( 'Destination directory for file streaming does not exist or is not writable.' ) );
 146		}
 147
 148		if ( is_null( $r['headers'] ) )
 149			$r['headers'] = array();
 150
 151		if ( ! is_array( $r['headers'] ) ) {
 152			$processedHeaders = WP_Http::processHeaders( $r['headers'] );
 153			$r['headers'] = $processedHeaders['headers'];
 154		}
 155
 156		if ( isset( $r['headers']['User-Agent'] ) ) {
 157			$r['user-agent'] = $r['headers']['User-Agent'];
 158			unset( $r['headers']['User-Agent'] );
 159		}
 160
 161		if ( isset( $r['headers']['user-agent'] ) ) {
 162			$r['user-agent'] = $r['headers']['user-agent'];
 163			unset( $r['headers']['user-agent'] );
 164		}
 165
 166		// Construct Cookie: header if any cookies are set
 167		WP_Http::buildCookieHeader( $r );
 168
 169		if ( WP_Http_Encoding::is_available() )
 170			$r['headers']['Accept-Encoding'] = WP_Http_Encoding::accept_encoding();
 171
 172		if ( ( ! is_null( $r['body'] ) && '' != $r['body'] ) || 'POST' == $r['method'] || 'PUT' == $r['method'] ) {
 173			if ( is_array( $r['body'] ) || is_object( $r['body'] ) ) {
 174				$r['body'] = http_build_query( $r['body'], null, '&' );
 175
 176				if ( ! isset( $r['headers']['Content-Type'] ) )
 177					$r['headers']['Content-Type'] = 'application/x-www-form-urlencoded; charset=' . get_option( 'blog_charset' );
 178			}
 179
 180			if ( '' === $r['body'] )
 181				$r['body'] = null;
 182
 183			if ( ! isset( $r['headers']['Content-Length'] ) && ! isset( $r['headers']['content-length'] ) )
 184				$r['headers']['Content-Length'] = strlen( $r['body'] );
 185		}
 186
 187		return $this->_dispatch_request($url, $r);
 188	}
 189
 190	/**
 191	 * Tests which transports are capable of supporting the request.
 192	 *
 193	 * @since 3.2.0
 194	 * @access private
 195	 *
 196	 * @param array $args Request arguments
 197	 * @param string $url URL to Request
 198	 *
 199	 * @return string|bool Class name for the first transport that claims to support the request. False if no transport claims to support the request.
 200	 */
 201	public function _get_first_available_transport( $args, $url = null ) {
 202		$request_order = array( 'curl', 'streams', 'fsockopen' );
 203
 204		// Loop over each transport on each HTTP request looking for one which will serve this request's needs
 205		foreach ( $request_order as $transport ) {
 206			$class = 'WP_HTTP_' . $transport;
 207
 208			// Check to see if this transport is a possibility, calls the transport statically
 209			if ( !call_user_func( array( $class, 'test' ), $args, $url ) )
 210				continue;
 211
 212			return $class;
 213		}
 214
 215		return false;
 216	}
 217
 218	/**
 219	 * Dispatches a HTTP request to a supporting transport.
 220	 *
 221	 * Tests each transport in order to find a transport which matches the request arguments.
 222	 * Also caches the transport instance to be used later.
 223	 *
 224	 * The order for blocking requests is cURL, Streams, and finally Fsockopen.
 225	 * The order for non-blocking requests is cURL, Streams and Fsockopen().
 226	 *
 227	 * There are currently issues with "localhost" not resolving correctly with DNS. This may cause
 228	 * an error "failed to open stream: A connection attempt failed because the connected party did
 229	 * not properly respond after a period of time, or established connection failed because [the]
 230	 * connected host has failed to respond."
 231	 *
 232	 * @since 3.2.0
 233	 * @access private
 234	 *
 235	 * @param string $url URL to Request
 236	 * @param array $args Request arguments
 237	 * @return array|object Array containing 'headers', 'body', 'response', 'cookies', 'filename'. A WP_Error instance upon error
 238	 */
 239	private function _dispatch_request( $url, $args ) {
 240		static $transports = array();
 241
 242		$class = $this->_get_first_available_transport( $args, $url );
 243		if ( !$class )
 244			return new WP_Error( 'http_failure', __( 'There are no HTTP transports available which can complete the requested request.' ) );
 245
 246		// Transport claims to support request, instantiate it and give it a whirl.
 247		if ( empty( $transports[$class] ) )
 248			$transports[$class] = new $class;
 249
 250		$response = $transports[$class]->request( $url, $args );
 251
 252		do_action( 'http_api_debug', $response, 'response', $class, $args, $url );
 253
 254		if ( is_wp_error( $response ) )
 255			return $response;
 256
 257		return apply_filters( 'http_response', $response, $args, $url );
 258	}
 259
 260	/**
 261	 * Uses the POST HTTP method.
 262	 *
 263	 * Used for sending data that is expected to be in the body.
 264	 *
 265	 * @access public
 266	 * @since 2.7.0
 267	 *
 268	 * @param string $url URI resource.
 269	 * @param str|array $args Optional. Override the defaults.
 270	 * @return array|object Array containing 'headers', 'body', 'response', 'cookies', 'filename'. A WP_Error instance upon error
 271	 */
 272	function post($url, $args = array()) {
 273		$defaults = array('method' => 'POST');
 274		$r = wp_parse_args( $args, $defaults );
 275		return $this->request($url, $r);
 276	}
 277
 278	/**
 279	 * Uses the GET HTTP method.
 280	 *
 281	 * Used for sending data that is expected to be in the body.
 282	 *
 283	 * @access public
 284	 * @since 2.7.0
 285	 *
 286	 * @param string $url URI resource.
 287	 * @param str|array $args Optional. Override the defaults.
 288	 * @return array|object Array containing 'headers', 'body', 'response', 'cookies', 'filename'. A WP_Error instance upon error
 289	 */
 290	function get($url, $args = array()) {
 291		$defaults = array('method' => 'GET');
 292		$r = wp_parse_args( $args, $defaults );
 293		return $this->request($url, $r);
 294	}
 295
 296	/**
 297	 * Uses the HEAD HTTP method.
 298	 *
 299	 * Used for sending data that is expected to be in the body.
 300	 *
 301	 * @access public
 302	 * @since 2.7.0
 303	 *
 304	 * @param string $url URI resource.
 305	 * @param str|array $args Optional. Override the defaults.
 306	 * @return array|object Array containing 'headers', 'body', 'response', 'cookies', 'filename'. A WP_Error instance upon error
 307	 */
 308	function head($url, $args = array()) {
 309		$defaults = array('method' => 'HEAD');
 310		$r = wp_parse_args( $args, $defaults );
 311		return $this->request($url, $r);
 312	}
 313
 314	/**
 315	 * Parses the responses and splits the parts into headers and body.
 316	 *
 317	 * @access public
 318	 * @static
 319	 * @since 2.7.0
 320	 *
 321	 * @param string $strResponse The full response string
 322	 * @return array Array with 'headers' and 'body' keys.
 323	 */
 324	function processResponse($strResponse) {
 325		$res = explode("\r\n\r\n", $strResponse, 2);
 326
 327		return array('headers' => $res[0], 'body' => isset($res[1]) ? $res[1] : '');
 328	}
 329
 330	/**
 331	 * Transform header string into an array.
 332	 *
 333	 * If an array is given then it is assumed to be raw header data with numeric keys with the
 334	 * headers as the values. No headers must be passed that were already processed.
 335	 *
 336	 * @access public
 337	 * @static
 338	 * @since 2.7.0
 339	 *
 340	 * @param string|array $headers
 341	 * @return array Processed string headers. If duplicate headers are encountered,
 342	 * 					Then a numbered array is returned as the value of that header-key.
 343	 */
 344	public static function processHeaders($headers) {
 345		// split headers, one per array element
 346		if ( is_string($headers) ) {
 347			// tolerate line terminator: CRLF = LF (RFC 2616 19.3)
 348			$headers = str_replace("\r\n", "\n", $headers);
 349			// unfold folded header fields. LWS = [CRLF] 1*( SP | HT ) <US-ASCII SP, space (32)>, <US-ASCII HT, horizontal-tab (9)> (RFC 2616 2.2)
 350			$headers = preg_replace('/\n[ \t]/', ' ', $headers);
 351			// create the headers array
 352			$headers = explode("\n", $headers);
 353		}
 354
 355		$response = array('code' => 0, 'message' => '');
 356
 357		// If a redirection has taken place, The headers for each page request may have been passed.
 358		// In this case, determine the final HTTP header and parse from there.
 359		for ( $i = count($headers)-1; $i >= 0; $i-- ) {
 360			if ( !empty($headers[$i]) && false === strpos($headers[$i], ':') ) {
 361				$headers = array_splice($headers, $i);
 362				break;
 363			}
 364		}
 365
 366		$cookies = array();
 367		$newheaders = array();
 368		foreach ( (array) $headers as $tempheader ) {
 369			if ( empty($tempheader) )
 370				continue;
 371
 372			if ( false === strpos($tempheader, ':') ) {
 373				$stack = explode(' ', $tempheader, 3);
 374				$stack[] = '';
 375				list( , $response['code'], $response['message']) = $stack;
 376				continue;
 377			}
 378
 379			list($key, $value) = explode(':', $tempheader, 2);
 380
 381			$key = strtolower( $key );
 382			$value = trim( $value );
 383
 384			if ( isset( $newheaders[ $key ] ) ) {
 385				if ( ! is_array( $newheaders[ $key ] ) )
 386					$newheaders[$key] = array( $newheaders[ $key ] );
 387				$newheaders[ $key ][] = $value;
 388			} else {
 389				$newheaders[ $key ] = $value;
 390			}
 391			if ( 'set-cookie' == $key )
 392				$cookies[] = new WP_Http_Cookie( $value );
 393		}
 394
 395		return array('response' => $response, 'headers' => $newheaders, 'cookies' => $cookies);
 396	}
 397
 398	/**
 399	 * Takes the arguments for a ::request() and checks for the cookie array.
 400	 *
 401	 * If it's found, then it's assumed to contain WP_Http_Cookie objects, which are each parsed
 402	 * into strings and added to the Cookie: header (within the arguments array). Edits the array by
 403	 * reference.
 404	 *
 405	 * @access public
 406	 * @version 2.8.0
 407	 * @static
 408	 *
 409	 * @param array $r Full array of args passed into ::request()
 410	 */
 411	public static function buildCookieHeader( &$r ) {
 412		if ( ! empty($r['cookies']) ) {
 413			$cookies_header = '';
 414			foreach ( (array) $r['cookies'] as $cookie ) {
 415				$cookies_header .= $cookie->getHeaderValue() . '; ';
 416			}
 417			$cookies_header = substr( $cookies_header, 0, -2 );
 418			$r['headers']['cookie'] = $cookies_header;
 419		}
 420	}
 421
 422	/**
 423	 * Decodes chunk transfer-encoding, based off the HTTP 1.1 specification.
 424	 *
 425	 * Based off the HTTP http_encoding_dechunk function. Does not support UTF-8. Does not support
 426	 * returning footer headers. Shouldn't be too difficult to support it though.
 427	 *
 428	 * @link http://tools.ietf.org/html/rfc2616#section-19.4.6 Process for chunked decoding.
 429	 *
 430	 * @todo Add support for footer chunked headers.
 431	 * @access public
 432	 * @since 2.7.0
 433	 * @static
 434	 *
 435	 * @param string $body Body content
 436	 * @return string Chunked decoded body on success or raw body on failure.
 437	 */
 438	function chunkTransferDecode($body) {
 439		$body = str_replace(array("\r\n", "\r"), "\n", $body);
 440		// The body is not chunked encoding or is malformed.
 441		if ( ! preg_match( '/^[0-9a-f]+(\s|\n)+/mi', trim($body) ) )
 442			return $body;
 443
 444		$parsedBody = '';
 445		//$parsedHeaders = array(); Unsupported
 446
 447		while ( true ) {
 448			$hasChunk = (bool) preg_match( '/^([0-9a-f]+)(\s|\n)+/mi', $body, $match );
 449
 450			if ( $hasChunk ) {
 451				if ( empty( $match[1] ) )
 452					return $body;
 453
 454				$length = hexdec( $match[1] );
 455				$chunkLength = strlen( $match[0] );
 456
 457				$strBody = substr($body, $chunkLength, $length);
 458				$parsedBody .= $strBody;
 459
 460				$body = ltrim(str_replace(array($match[0], $strBody), '', $body), "\n");
 461
 462				if ( "0" == trim($body) )
 463					return $parsedBody; // Ignore footer headers.
 464			} else {
 465				return $body;
 466			}
 467		}
 468	}
 469
 470	/**
 471	 * Block requests through the proxy.
 472	 *
 473	 * Those who are behind a proxy and want to prevent access to certain hosts may do so. This will
 474	 * prevent plugins from working and core functionality, if you don't include api.wordpress.org.
 475	 *
 476	 * You block external URL requests by defining WP_HTTP_BLOCK_EXTERNAL as true in your wp-config.php
 477	 * file and this will only allow localhost and your blog to make requests. The constant
 478	 * WP_ACCESSIBLE_HOSTS will allow additional hosts to go through for requests. The format of the
 479	 * WP_ACCESSIBLE_HOSTS constant is a comma separated list of hostnames to allow, wildcard domains
 480	 * are supported, eg *.wordpress.org will allow for all subdomains of wordpress.org to be contacted.
 481	 *
 482	 * @since 2.8.0
 483	 * @link http://core.trac.wordpress.org/ticket/8927 Allow preventing external requests.
 484	 * @link http://core.trac.wordpress.org/ticket/14636 Allow wildcard domains in WP_ACCESSIBLE_HOSTS
 485	 *
 486	 * @param string $uri URI of url.
 487	 * @return bool True to block, false to allow.
 488	 */
 489	function block_request($uri) {
 490		// We don't need to block requests, because nothing is blocked.
 491		if ( ! defined( 'WP_HTTP_BLOCK_EXTERNAL' ) || ! WP_HTTP_BLOCK_EXTERNAL )
 492			return false;
 493
 494		// parse_url() only handles http, https type URLs, and will emit E_WARNING on failure.
 495		// This will be displayed on blogs, which is not reasonable.
 496		$check = @parse_url($uri);
 497
 498		/* Malformed URL, can not process, but this could mean ssl, so let through anyway.
 499		 *
 500		 * This isn't very security sound. There are instances where a hacker might attempt
 501		 * to bypass the proxy and this check. However, the reason for this behavior is that
 502		 * WordPress does not do any checking currently for non-proxy requests, so it is keeps with
 503		 * the default unsecure nature of the HTTP request.
 504		 */
 505		if ( $check === false )
 506			return false;
 507
 508		$home = parse_url( get_option('siteurl') );
 509
 510		// Don't block requests back to ourselves by default
 511		if ( $check['host'] == 'localhost' || $check['host'] == $home['host'] )
 512			return apply_filters('block_local_requests', false);
 513
 514		if ( !defined('WP_ACCESSIBLE_HOSTS') )
 515			return true;
 516
 517		static $accessible_hosts;
 518		static $wildcard_regex = false;
 519		if ( null == $accessible_hosts ) {
 520			$accessible_hosts = preg_split('|,\s*|', WP_ACCESSIBLE_HOSTS);
 521
 522			if ( false !== strpos(WP_ACCESSIBLE_HOSTS, '*') ) {
 523				$wildcard_regex = array();
 524				foreach ( $accessible_hosts as $host )
 525					$wildcard_regex[] = str_replace('\*', '[\w.]+?', preg_quote($host, '/'));
 526				$wildcard_regex = '/^(' . implode('|', $wildcard_regex) . ')$/i';
 527			}
 528		}
 529
 530		if ( !empty($wildcard_regex) )
 531			return !preg_match($wildcard_regex, $check['host']);
 532		else
 533			return !in_array( $check['host'], $accessible_hosts ); //Inverse logic, If its in the array, then we can't access it.
 534
 535	}
 536
 537	static function make_absolute_url( $maybe_relative_path, $url ) {
 538		if ( empty( $url ) )
 539			return $maybe_relative_path;
 540
 541		// Check for a scheme
 542		if ( false !== strpos( $maybe_relative_path, '://' ) )
 543			return $maybe_relative_path;
 544
 545		if ( ! $url_parts = @parse_url( $url ) )
 546			return $maybe_relative_path;
 547
 548		if ( ! $relative_url_parts = @parse_url( $maybe_relative_path ) )
 549			return $maybe_relative_path;
 550
 551		$absolute_path = $url_parts['scheme'] . '://' . $url_parts['host'];
 552		if ( isset( $url_parts['port'] ) )
 553			$absolute_path .= ':' . $url_parts['port'];
 554
 555		// Start off with the Absolute URL path
 556		$path = ! empty( $url_parts['path'] ) ? $url_parts['path'] : '/';
 557
 558		// If the it's a root-relative path, then great
 559		if ( ! empty( $relative_url_parts['path'] ) && '/' == $relative_url_parts['path'][0] ) {
 560			$path = $relative_url_parts['path'];
 561
 562		// Else it's a relative path
 563		} elseif ( ! empty( $relative_url_parts['path'] ) ) {
 564			// Strip off any file components from the absolute path
 565			$path = substr( $path, 0, strrpos( $path, '/' ) + 1 );
 566
 567			// Build the new path
 568			$path .= $relative_url_parts['path'];
 569
 570			// Strip all /path/../ out of the path
 571			while ( strpos( $path, '../' ) > 1 ) {
 572				$path = preg_replace( '![^/]+/\.\./!', '', $path );
 573			}
 574
 575			// Strip any final leading ../ from the path
 576			$path = preg_replace( '!^/(\.\./)+!', '', $path );
 577		}
 578
 579		// Add the Query string
 580		if ( ! empty( $relative_url_parts['query'] ) )
 581			$path .= '?' . $relative_url_parts['query'];
 582
 583		return $absolute_path . '/' . ltrim( $path, '/' );
 584	}
 585}
 586
 587/**
 588 * HTTP request method uses fsockopen function to retrieve the url.
 589 *
 590 * This would be the preferred method, but the fsockopen implementation has the most overhead of all
 591 * the HTTP transport implementations.
 592 *
 593 * @package WordPress
 594 * @subpackage HTTP
 595 * @since 2.7.0
 596 */
 597class WP_Http_Fsockopen {
 598	/**
 599	 * Send a HTTP request to a URI using fsockopen().
 600	 *
 601	 * Does not support non-blocking mode.
 602	 *
 603	 * @see WP_Http::request For default options descriptions.
 604	 *
 605	 * @since 2.7
 606	 * @access public
 607	 * @param string $url URI resource.
 608	 * @param str|array $args Optional. Override the defaults.
 609	 * @return array 'headers', 'body', 'response', 'cookies' and 'filename' keys.
 610	 */
 611	function request($url, $args = array()) {
 612		$defaults = array(
 613			'method' => 'GET', 'timeout' => 5,
 614			'redirection' => 5, 'httpversion' => '1.0',
 615			'blocking' => true,
 616			'headers' => array(), 'body' => null, 'cookies' => array()
 617		);
 618
 619		$r = wp_parse_args( $args, $defaults );
 620
 621		if ( isset($r['headers']['User-Agent']) ) {
 622			$r['user-agent'] = $r['headers']['User-Agent'];
 623			unset($r['headers']['User-Agent']);
 624		} else if ( isset($r['headers']['user-agent']) ) {
 625			$r['user-agent'] = $r['headers']['user-agent'];
 626			unset($r['headers']['user-agent']);
 627		}
 628
 629		// Construct Cookie: header if any cookies are set
 630		WP_Http::buildCookieHeader( $r );
 631
 632		$iError = null; // Store error number
 633		$strError = null; // Store error string
 634
 635		$arrURL = parse_url($url);
 636
 637		$fsockopen_host = $arrURL['host'];
 638
 639		$secure_transport = false;
 640
 641		if ( ! isset( $arrURL['port'] ) ) {
 642			if ( ( $arrURL['scheme'] == 'ssl' || $arrURL['scheme'] == 'https' ) && extension_loaded('openssl') ) {
 643				$fsockopen_host = "ssl://$fsockopen_host";
 644				$arrURL['port'] = 443;
 645				$secure_transport = true;
 646			} else {
 647				$arrURL['port'] = 80;
 648			}
 649		}
 650
 651		//fsockopen has issues with 'localhost' with IPv6 with certain versions of PHP, It attempts to connect to ::1,
 652		// which fails when the server is not set up for it. For compatibility, always connect to the IPv4 address.
 653		if ( 'localhost' == strtolower($fsockopen_host) )
 654			$fsockopen_host = '127.0.0.1';
 655
 656		// There are issues with the HTTPS and SSL protocols that cause errors that can be safely
 657		// ignored and should be ignored.
 658		if ( true === $secure_transport )
 659			$error_reporting = error_reporting(0);
 660
 661		$startDelay = time();
 662
 663		$proxy = new WP_HTTP_Proxy();
 664
 665		if ( !WP_DEBUG ) {
 666			if ( $proxy->is_enabled() && $proxy->send_through_proxy( $url ) )
 667				$handle = @fsockopen( $proxy->host(), $proxy->port(), $iError, $strError, $r['timeout'] );
 668			else
 669				$handle = @fsockopen( $fsockopen_host, $arrURL['port'], $iError, $strError, $r['timeout'] );
 670		} else {
 671			if ( $proxy->is_enabled() && $proxy->send_through_proxy( $url ) )
 672				$handle = fsockopen( $proxy->host(), $proxy->port(), $iError, $strError, $r['timeout'] );
 673			else
 674				$handle = fsockopen( $fsockopen_host, $arrURL['port'], $iError, $strError, $r['timeout'] );
 675		}
 676
 677		$endDelay = time();
 678
 679		// If the delay is greater than the timeout then fsockopen shouldn't be used, because it will
 680		// cause a long delay.
 681		$elapseDelay = ($endDelay-$startDelay) > $r['timeout'];
 682		if ( true === $elapseDelay )
 683			add_option( 'disable_fsockopen', $endDelay, null, true );
 684
 685		if ( false === $handle )
 686			return new WP_Error('http_request_failed', $iError . ': ' . $strError);
 687
 688		$timeout = (int) floor( $r['timeout'] );
 689		$utimeout = $timeout == $r['timeout'] ? 0 : 1000000 * $r['timeout'] % 1000000;
 690		stream_set_timeout( $handle, $timeout, $utimeout );
 691
 692		if ( $proxy->is_enabled() && $proxy->send_through_proxy( $url ) ) //Some proxies require full URL in this field.
 693			$requestPath = $url;
 694		else
 695			$requestPath = $arrURL['path'] . ( isset($arrURL['query']) ? '?' . $arrURL['query'] : '' );
 696
 697		if ( empty($requestPath) )
 698			$requestPath .= '/';
 699
 700		$strHeaders = strtoupper($r['method']) . ' ' . $requestPath . ' HTTP/' . $r['httpversion'] . "\r\n";
 701
 702		if ( $proxy->is_enabled() && $proxy->send_through_proxy( $url ) )
 703			$strHeaders .= 'Host: ' . $arrURL['host'] . ':' . $arrURL['port'] . "\r\n";
 704		else
 705			$strHeaders .= 'Host: ' . $arrURL['host'] . "\r\n";
 706
 707		if ( isset($r['user-agent']) )
 708			$strHeaders .= 'User-agent: ' . $r['user-agent'] . "\r\n";
 709
 710		if ( is_array($r['headers']) ) {
 711			foreach ( (array) $r['headers'] as $header => $headerValue )
 712				$strHeaders .= $header . ': ' . $headerValue . "\r\n";
 713		} else {
 714			$strHeaders .= $r['headers'];
 715		}
 716
 717		if ( $proxy->use_authentication() )
 718			$strHeaders .= $proxy->authentication_header() . "\r\n";
 719
 720		$strHeaders .= "\r\n";
 721
 722		if ( ! is_null($r['body']) )
 723			$strHeaders .= $r['body'];
 724
 725		fwrite($handle, $strHeaders);
 726
 727		if ( ! $r['blocking'] ) {
 728			fclose($handle);
 729			return array( 'headers' => array(), 'body' => '', 'response' => array('code' => false, 'message' => false), 'cookies' => array() );
 730		}
 731
 732		$strResponse = '';
 733		$bodyStarted = false;
 734
 735		// If streaming to a file setup the file handle
 736		if ( $r['stream'] ) {
 737			if ( ! WP_DEBUG )
 738				$stream_handle = @fopen( $r['filename'], 'w+' );
 739			else
 740				$stream_handle = fopen( $r['filename'], 'w+' );
 741			if ( ! $stream_handle )
 742				return new WP_Error( 'http_request_failed', sprintf( __( 'Could not open handle for fopen() to %s' ), $r['filename'] ) );
 743
 744			while ( ! feof($handle) ) {
 745				$block = fread( $handle, 4096 );
 746				if ( $bodyStarted ) {
 747					fwrite( $stream_handle, $block );
 748				} else {
 749					$strResponse .= $block;
 750					if ( strpos( $strResponse, "\r\n\r\n" ) ) {
 751						$process = WP_Http::processResponse( $strResponse );
 752						$bodyStarted = true;
 753						fwrite( $stream_handle, $process['body'] );
 754						unset( $strResponse );
 755						$process['body'] = '';
 756					}
 757				}
 758			}
 759
 760			fclose( $stream_handle );
 761
 762		} else {
 763			while ( ! feof($handle) )
 764				$strResponse .= fread( $handle, 4096 );
 765
 766			$process = WP_Http::processResponse( $strResponse );
 767			unset( $strResponse );
 768		}
 769
 770		fclose( $handle );
 771
 772		if ( true === $secure_transport )
 773			error_reporting($error_reporting);
 774
 775		$arrHeaders = WP_Http::processHeaders( $process['headers'] );
 776
 777		// If location is found, then assume redirect and redirect to location.
 778		if ( isset($arrHeaders['headers']['location']) && 0 !== $r['_redirection'] ) {
 779			if ( $r['redirection']-- > 0 ) {
 780				return $this->request( WP_HTTP::make_absolute_url( $arrHeaders['headers']['location'], $url ), $r);
 781			} else {
 782				return new WP_Error('http_request_failed', __('Too many redirects.'));
 783			}
 784		}
 785
 786		// If the body was chunk encoded, then decode it.
 787		if ( ! empty( $process['body'] ) && isset( $arrHeaders['headers']['transfer-encoding'] ) && 'chunked' == $arrHeaders['headers']['transfer-encoding'] )
 788			$process['body'] = WP_Http::chunkTransferDecode($process['body']);
 789
 790		if ( true === $r['decompress'] && true === WP_Http_Encoding::should_decode($arrHeaders['headers']) )
 791			$process['body'] = WP_Http_Encoding::decompress( $process['body'] );
 792
 793		return array( 'headers' => $arrHeaders['headers'], 'body' => $process['body'], 'response' => $arrHeaders['response'], 'cookies' => $arrHeaders['cookies'], 'filename' => $r['filename'] );
 794	}
 795
 796	/**
 797	 * Whether this class can be used for retrieving an URL.
 798	 *
 799	 * @since 2.7.0
 800	 * @static
 801	 * @return boolean False means this class can not be used, true means it can.
 802	 */
 803	public static function test( $args = array() ) {
 804		if ( ! function_exists( 'fsockopen' ) )
 805			return false;
 806
 807		if ( false !== ( $option = get_option( 'disable_fsockopen' ) ) && time() - $option < 12 * HOUR_IN_SECONDS )
 808			return false;
 809
 810		$is_ssl = isset( $args['ssl'] ) && $args['ssl'];
 811
 812		if ( $is_ssl && ! extension_loaded( 'openssl' ) )
 813			return false;
 814
 815		return apply_filters( 'use_fsockopen_transport', true, $args );
 816	}
 817}
 818
 819/**
 820 * HTTP request method uses Streams to retrieve the url.
 821 *
 822 * Requires PHP 5.0+ and uses fopen with stream context. Requires that 'allow_url_fopen' PHP setting
 823 * to be enabled.
 824 *
 825 * Second preferred method for getting the URL, for PHP 5.
 826 *
 827 * @package WordPress
 828 * @subpackage HTTP
 829 * @since 2.7.0
 830 */
 831class WP_Http_Streams {
 832	/**
 833	 * Send a HTTP request to a URI using streams with fopen().
 834	 *
 835	 * @access public
 836	 * @since 2.7.0
 837	 *
 838	 * @param string $url
 839	 * @param str|array $args Optional. Override the defaults.
 840	 * @return array 'headers', 'body', 'response', 'cookies' and 'filename' keys.
 841	 */
 842	function request($url, $args = array()) {
 843		$defaults = array(
 844			'method' => 'GET', 'timeout' => 5,
 845			'redirection' => 5, 'httpversion' => '1.0',
 846			'blocking' => true,
 847			'headers' => array(), 'body' => null, 'cookies' => array()
 848		);
 849
 850		$r = wp_parse_args( $args, $defaults );
 851
 852		if ( isset($r['headers']['User-Agent']) ) {
 853			$r['user-agent'] = $r['headers']['User-Agent'];
 854			unset($r['headers']['User-Agent']);
 855		} else if ( isset($r['headers']['user-agent']) ) {
 856			$r['user-agent'] = $r['headers']['user-agent'];
 857			unset($r['headers']['user-agent']);
 858		}
 859
 860		// Construct Cookie: header if any cookies are set
 861		WP_Http::buildCookieHeader( $r );
 862
 863		$arrURL = parse_url($url);
 864
 865		if ( false === $arrURL )
 866			return new WP_Error('http_request_failed', sprintf(__('Malformed URL: %s'), $url));
 867
 868		if ( 'http' != $arrURL['scheme'] && 'https' != $arrURL['scheme'] )
 869			$url = preg_replace('|^' . preg_quote($arrURL['scheme'], '|') . '|', 'http', $url);
 870
 871		// Convert Header array to string.
 872		$strHeaders = '';
 873		if ( is_array( $r['headers'] ) )
 874			foreach ( $r['headers'] as $name => $value )
 875				$strHeaders .= "{$name}: $value\r\n";
 876		else if ( is_string( $r['headers'] ) )
 877			$strHeaders = $r['headers'];
 878
 879		$is_local = isset($args['local']) && $args['local'];
 880		$ssl_verify = isset($args['sslverify']) && $args['sslverify'];
 881		if ( $is_local )
 882			$ssl_verify = apply_filters('https_local_ssl_verify', $ssl_verify);
 883		elseif ( ! $is_local )
 884			$ssl_verify = apply_filters('https_ssl_verify', $ssl_verify);
 885
 886		$arrContext = array('http' =>
 887			array(
 888				'method' => strtoupper($r['method']),
 889				'user_agent' => $r['user-agent'],
 890				'max_redirects' => $r['redirection'] + 1, // See #11557
 891				'protocol_version' => (float) $r['httpversion'],
 892				'header' => $strHeaders,
 893				'ignore_errors' => true, // Return non-200 requests.
 894				'timeout' => $r['timeout'],
 895				'ssl' => array(
 896						'verify_peer' => $ssl_verify,
 897						'verify_host' => $ssl_verify
 898				)
 899			)
 900		);
 901
 902		$proxy = new WP_HTTP_Proxy();
 903
 904		if ( $proxy->is_enabled() && $proxy->send_through_proxy( $url ) ) {
 905			$arrContext['http']['proxy'] = 'tcp://' . $proxy->host() . ':' . $proxy->port();
 906			$arrContext['http']['request_fulluri'] = true;
 907
 908			// We only support Basic authentication so this will only work if that is what your proxy supports.
 909			if ( $proxy->use_authentication() )
 910				$arrContext['http']['header'] .= $proxy->authentication_header() . "\r\n";
 911		}
 912
 913		if ( ! is_null( $r['body'] ) )
 914			$arrContext['http']['content'] = $r['body'];
 915
 916		$context = stream_context_create($arrContext);
 917
 918		if ( !WP_DEBUG )
 919			$handle = @fopen($url, 'r', false, $context);
 920		else
 921			$handle = fopen($url, 'r', false, $context);
 922
 923		if ( ! $handle )
 924			return new WP_Error('http_request_failed', sprintf(__('Could not open handle for fopen() to %s'), $url));
 925
 926		$timeout = (int) floor( $r['timeout'] );
 927		$utimeout = $timeout == $r['timeout'] ? 0 : 1000000 * $r['timeout'] % 1000000;
 928		stream_set_timeout( $handle, $timeout, $utimeout );
 929
 930		if ( ! $r['blocking'] ) {
 931			stream_set_blocking($handle, 0);
 932			fclose($handle);
 933			return array( 'headers' => array(), 'body' => '', 'response' => array('code' => false, 'message' => false), 'cookies' => array() );
 934		}
 935
 936		if ( $r['stream'] ) {
 937			if ( ! WP_DEBUG )
 938				$stream_handle = @fopen( $r['filename'], 'w+' );
 939			else
 940				$stream_handle = fopen( $r['filename'], 'w+' );
 941
 942			if ( ! $stream_handle )
 943				return new WP_Error( 'http_request_failed', sprintf( __( 'Could not open handle for fopen() to %s' ), $r['filename'] ) );
 944
 945			stream_copy_to_stream( $handle, $stream_handle );
 946
 947			fclose( $stream_handle );
 948			$strResponse = '';
 949		} else {
 950			$strResponse = stream_get_contents( $handle );
 951		}
 952
 953		$meta = stream_get_meta_data( $handle );
 954
 955		fclose( $handle );
 956
 957		$processedHeaders = array();
 958		if ( isset( $meta['wrapper_data']['headers'] ) )
 959			$processedHeaders = WP_Http::processHeaders($meta['wrapper_data']['headers']);
 960		else
 961			$processedHeaders = WP_Http::processHeaders($meta['wrapper_data']);
 962
 963		// Streams does not provide an error code which we can use to see why the request stream stopped.
 964		// We can however test to see if a location header is present and return based on that.
 965		if ( isset($processedHeaders['headers']['location']) && 0 !== $args['_redirection'] )
 966			return new WP_Error('http_request_failed', __('Too many redirects.'));
 967
 968		if ( ! empty( $strResponse ) && isset( $processedHeaders['headers']['transfer-encoding'] ) && 'chunked' == $processedHeaders['headers']['transfer-encoding'] )
 969			$strResponse = WP_Http::chunkTransferDecode($strResponse);
 970
 971		if ( true === $r['decompress'] && true === WP_Http_Encoding::should_decode($processedHeaders['headers']) )
 972			$strResponse = WP_Http_Encoding::decompress( $strResponse );
 973
 974		return array( 'headers' => $processedHeaders['headers'], 'body' => $strResponse, 'response' => $processedHeaders['response'], 'cookies' => $processedHeaders['cookies'], 'filename' => $r['filename'] );
 975	}
 976
 977	/**
 978	 * Whether this class can be used for retrieving an URL.
 979	 *
 980	 * @static
 981	 * @access public
 982	 * @since 2.7.0
 983	 *
 984	 * @return boolean False means this class can not be used, true means it can.
 985	 */
 986	public static function test( $args = array() ) {
 987		if ( ! function_exists( 'fopen' ) )
 988			return false;
 989
 990		if ( ! function_exists( 'ini_get' ) || true != ini_get( 'allow_url_fopen' ) )
 991			return false;
 992
 993		$is_ssl = isset( $args['ssl'] ) && $args['ssl'];
 994
 995		if ( $is_ssl && ! extension_loaded( 'openssl' ) )
 996			return false;
 997
 998		return apply_filters( 'use_streams_transport', true, $args );
 999	}
1000}
1001
1002/**
1003 * HTTP request method uses Curl extension to retrieve the url.
1004 *
1005 * Requires the Curl extension to be installed.
1006 *
1007 * @package WordPress
1008 * @subpackage HTTP
1009 * @since 2.7
1010 */
1011class WP_Http_Curl {
1012
1013	/**
1014	 * Temporary header storage for use with streaming to a file.
1015	 *
1016	 * @since 3.2.0
1017	 * @access private
1018	 * @var string
1019	 */
1020	private $headers = '';
1021
1022	/**
1023	 * Send a HTTP request to a URI using cURL extension.
1024	 *
1025	 * @access public
1026	 * @since 2.7.0
1027	 *
1028	 * @param string $url
1029	 * @param str|array $args Optional. Override the defaults.
1030	 * @return array 'headers', 'body', 'response', 'cookies' and 'filename' keys.
1031	 */
1032	function request($url, $args = array()) {
1033		$defaults = array(
1034			'method' => 'GET', 'timeout' => 5,
1035			'redirection' => 5, 'httpversion' => '1.0',
1036			'blocking' => true,
1037			'headers' => array(), 'body' => null, 'cookies' => array()
1038		);
1039
1040		$r = wp_parse_args( $args, $defaults );
1041
1042		if ( isset($r['headers']['User-Agent']) ) {
1043			$r['user-agent'] = $r['headers']['User-Agent'];
1044			unset($r['headers']['User-Agent']);
1045		} else if ( isset($r['headers']['user-agent']) ) {
1046			$r['user-agent'] = $r['headers']['user-agent'];
1047			unset($r['headers']['user-agent']);
1048		}
1049
1050		// Construct Cookie: header if any cookies are set.
1051		WP_Http::buildCookieHeader( $r );
1052
1053		$handle = curl_init();
1054
1055		// cURL offers really easy proxy support.
1056		$proxy = new WP_HTTP_Proxy();
1057
1058		if ( $proxy->is_enabled() && $proxy->send_through_proxy( $url ) ) {
1059
1060			curl_setopt( $handle, CURLOPT_PROXYTYPE, CURLPROXY_HTTP );
1061			curl_setopt( $handle, CURLOPT_PROXY, $proxy->host() );
1062			curl_setopt( $handle, CURLOPT_PROXYPORT, $proxy->port() );
1063
1064			if ( $proxy->use_authentication() ) {
1065				curl_setopt( $handle, CURLOPT_PROXYAUTH, CURLAUTH_ANY );
1066				curl_setopt( $handle, CURLOPT_PROXYUSERPWD, $proxy->authentication() );
1067			}
1068		}
1069
1070		$is_local = isset($r['local']) && $r['local'];
1071		$ssl_verify = isset($r['sslverify']) && $r['sslverify'];
1072		if ( $is_local )
1073			$ssl_verify = apply_filters('https_local_ssl_verify', $ssl_verify);
1074		elseif ( ! $is_local )
1075			$ssl_verify = apply_filters('https_ssl_verify', $ssl_verify);
1076
1077		// CURLOPT_TIMEOUT and CURLOPT_CONNECTTIMEOUT expect integers. Have to use ceil since
1078		// a value of 0 will allow an unlimited timeout.
1079		$timeout = (int) ceil( $r['timeout'] );
1080		curl_setopt( $handle, CURLOPT_CONNECTTIMEOUT, $timeout );
1081		curl_setopt( $handle, CURLOPT_TIMEOUT, $timeout );
1082
1083		curl_setopt( $handle, CURLOPT_URL, $url);
1084		curl_setopt( $handle, CURLOPT_RETURNTRANSFER, true );
1085		curl_setopt( $handle, CURLOPT_SSL_VERIFYHOST, ( $ssl_verify === true ) ? 2 : false );
1086		curl_setopt( $handle, CURLOPT_SSL_VERIFYPEER, $ssl_verify );
1087		curl_setopt( $handle, CURLOPT_USERAGENT, $r['user-agent'] );
1088		// The option doesn't work with safe mode or when open_basedir is set, and there's a
1089		// bug #17490 with redirected POST requests, so handle redirections outside Curl.
1090		curl_setopt( $handle, CURLOPT_FOLLOWLOCATION, false );
1091
1092		switch ( $r['method'] ) {
1093			case 'HEAD':
1094				curl_setopt( $handle, CURLOPT_NOBODY, true );
1095				break;
1096			case 'POST':
1097				curl_setopt( $handle, CURLOPT_POST, true );
1098				curl_setopt( $handle, CURLOPT_POSTFIELDS, $r['body'] );
1099				break;
1100			case 'PUT':
1101				curl_setopt( $handle, CURLOPT_CUSTOMREQUEST, 'PUT' );
1102				curl_setopt( $handle, CURLOPT_POSTFIELDS, $r['body'] );
1103				break;
1104			default:
1105				curl_setopt( $handle, CURLOPT_CUSTOMREQUEST, $r['method'] );
1106				if ( ! is_null( $r['body'] ) )
1107					curl_setopt( $handle, CURLOPT_POSTFIELDS, $r['body'] );
1108				break;
1109		}
1110
1111		if ( true === $r['blocking'] )
1112			curl_setopt( $handle, CURLOPT_HEADERFUNCTION, array( $this, 'stream_headers' ) );
1113
1114		curl_setopt( $handle, CURLOPT_HEADER, false );
1115
1116		// If streaming to a file open a file handle, and setup our curl streaming handler
1117		if ( $r['stream'] ) {
1118			if ( ! WP_DEBUG )
1119				$stream_handle = @fopen( $r['filename'], 'w+' );
1120			else
1121				$stream_handle = fopen( $r['filename'], 'w+' );
1122			if ( ! $stream_handle )
1123				return new WP_Error( 'http_request_failed', sprintf( __( 'Could not open handle for fopen() to %s' ), $r['filename'] ) );
1124			curl_setopt( $handle, CURLOPT_FILE, $stream_handle );
1125		}
1126
1127		if ( !empty( $r['headers'] ) ) {
1128			// cURL expects full header strings in each element
1129			$headers = array();
1130			foreach ( $r['headers'] as $name => $value ) {
1131				$headers[] = "{$name}: $value";
1132			}
1133			curl_setopt( $handle, CURLOPT_HTTPHEADER, $headers );
1134		}
1135
1136		if ( $r['httpversion'] == '1.0' )
1137			curl_setopt( $handle, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_0 );
1138		else
1139			curl_setopt( $handle, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1 );
1140
1141		// Cookies are not handled by the HTTP API currently. Allow for plugin authors to handle it
1142		// themselves... Although, it is somewhat pointless without some reference.
1143		do_action_ref_array( 'http_api_curl', array(&$handle) );
1144
1145		// We don't need to return the body, so don't. Just execute request and return.
1146		if ( ! $r['blocking'] ) {
1147			curl_exec( $handle );
1148			curl_close( $handle );
1149			return array( 'headers' => array(), 'body' => '', 'response' => array('code' => false, 'message' => false), 'cookies' => array() );
1150		}
1151
1152		$theResponse = curl_exec( $handle );
1153		$theBody = '';
1154		$theHeaders = WP_Http::processHeaders( $this->headers );
1155
1156		if ( strlen($theResponse) > 0 && ! is_bool( $theResponse ) ) // is_bool: when using $args['stream'], curl_exec will return (bool)true
1157			$theBody = $theResponse;
1158
1159		// If no response
1160		if ( 0 == strlen( $theResponse ) && empty( $theHeaders['headers'] ) ) {
1161			if ( $curl_error = curl_error( $handle ) )
1162				return new WP_Error( 'http_request_failed', $curl_error );
1163			if ( in_array( curl_getinfo( $handle, CURLINFO_HTTP_CODE ), array( 301, 302 ) ) )
1164				return new WP_Error( 'http_request_failed', __( 'Too many redirects.' ) );
1165		}
1166
1167		$this->headers = '';
1168
1169		$response = array();
1170		$response['code'] = curl_getinfo( $handle, CURLINFO_HTTP_CODE );
1171		$response['message'] = get_status_header_desc($response['code']);
1172
1173		curl_close( $handle );
1174
1175		if ( $r['stream'] )
1176			fclose( $stream_handle );
1177
1178		// See #11305 - When running under safe mode, redirection is disabled above. Handle it manually.
1179		if ( ! empty( $theHeaders['headers']['location'] ) && 0 !== $r['_redirection'] ) { // _redirection: The requested number of redirections
1180			if ( $r['redirection']-- > 0 ) {
1181				return $this->request( WP_HTTP::make_absolute_url( $theHeaders['headers']['location'], $url ), $r );
1182			} else {
1183				return new WP_Error( 'http_request_failed', __( 'Too many redirects.' ) );
1184			}
1185		}
1186
1187		if ( true === $r['decompress'] && true === WP_Http_Encoding::should_decode($theHeaders['headers']) )
1188			$theBody = WP_Http_Encoding::decompress( $theBody );
1189
1190		return array( 'headers' => $theHeaders['headers'], 'body' => $theBody, 'response' => $response, 'cookies' => $theHeaders['cookies'], 'filename' => $r['filename'] );
1191	}
1192
1193	/**
1194	 * Grab the headers of the cURL request
1195	 *
1196	 * Each header is sent individually to this callback, so we append to the $header property for temporary storage
1197	 *
1198	 * @since 3.2.0
1199	 * @access private
1200	 * @return int
1201	 */
1202	private function stream_headers( $handle, $headers ) {
1203		$this->headers .= $headers;
1204		return strlen( $headers );
1205	}
1206
1207	/**
1208	 * Whether this class can be used for retrieving an URL.
1209	 *
1210	 * @static
1211	 * @since 2.7.0
1212	 *
1213	 * @return boolean False means this class can not be used, true means it can.
1214	 */
1215	public static function test( $args = array() ) {
1216		if ( ! function_exists( 'curl_init' ) || ! function_exists( 'curl_exec' ) )
1217			return false;
1218
1219		$is_ssl = isset( $args['ssl'] ) && $args['ssl'];
1220
1221		if ( $is_ssl ) {
1222			$curl_version = curl_version();
1223			if ( ! (CURL_VERSION_SSL & $curl_version['features']) ) // Does this cURL version support SSL requests?
1224				return false;
1225		}
1226
1227		return apply_filters( 'use_curl_transport', true, $args );
1228	}
1229}
1230
1231/**
1232 * Adds Proxy support to the WordPress HTTP API.
1233 *
1234 * There are caveats to proxy support. It requires that defines be made in the wp-config.php file to
1235 * enable proxy support. There are also a few filters that plugins can hook into for some of the
1236 * constants.
1237 *
1238 * Please note that only BASIC authentication is supported by most transports.
1239 * cURL MAY support more methods (such as NTLM authentication) depending on your environment.
1240 *
1241 * The constants are as follows:
1242 * <ol>
1243 * <li>WP_PROXY_HOST - Enable proxy support and host for connecting.</li>
1244 * <li>WP_PROXY_PORT - Proxy port for connection. No default, must be defined.</li>
1245 * <li>WP_PROXY_USERNAME - Proxy username, if it requires authentication.</li>
1246 * <li>WP_PROXY_PASSWORD - Proxy password, if it requires authentication.</li>
1247 * <li>WP_PROXY_BYPASS_HOSTS - Will prevent the hosts in this list from going through the proxy.
1248 * You do not need to have localhost and the blog host in this list, because they will not be passed
1249 * through the proxy. The list should be presented in a comma separated list, wildcards using * are supported, eg. *.wordpress.org</li>
1250 * </ol>
1251 *
1252 * An example can be as seen below.
1253 * <code>
1254 * define('WP_PROXY_HOST', '192.168.84.101');
1255 * define('WP_PROXY_PORT', '8080');
1256 * define('WP_PROXY_BYPASS_HOSTS', 'localhost, www.example.com, *.wordpress.org');
1257 * </code>
1258 *
1259 * @link http://core.trac.wordpress.org/ticket/4011 Proxy support ticket in WordPress.
1260 * @link http://core.trac.wordpress.org/ticket/14636 Allow wildcard domains in WP_PROXY_BYPASS_HOSTS
1261 * @since 2.8
1262 */
1263class WP_HTTP_Proxy {
1264
1265	/**
1266	 * Whether proxy connection should be used.
1267	 *
1268	 * @since 2.8
1269	 * @use WP_PROXY_HOST
1270	 * @use WP_PROXY_PORT
1271	 *
1272	 * @return bool
1273	 */
1274	function is_enabled() {
1275		return defined('WP_PROXY_HOST') && defined('WP_PROXY_PORT');
1276	}
1277
1278	/**
1279	 * Whether authentication should be used.
1280	 *
1281	 * @since 2.8
1282	 * @use WP_PROXY_USERNAME
1283	 * @use WP_PROXY_PASSWORD
1284	 *
1285	 * @return bool
1286	 */
1287	function use_authentication() {
1288		return defined('WP_PROXY_USERNAME') && defined('WP_PROXY_PASSWORD');
1289	}
1290
1291	/**
1292	 * Retrieve the host for the proxy server.
1293	 *
1294	 * @since 2.8
1295	 *
1296	 * @return string
1297	 */
1298	function host() {
1299		if ( defined('WP_PROXY_HOST') )
1300			return WP_PROXY_HOST;
1301
1302		return '';
1303	}
1304
1305	/**
1306	 * Retrieve the port for the proxy server.
1307	 *
1308	 * @since 2.8
1309	 *
1310	 * @return string
1311	 */
1312	function port() {
1313		if ( defined('WP_PROXY_PORT') )
1314			return WP_PROXY_PORT;
1315
1316		return '';
1317	}
1318
1319	/**
1320	 * Retrieve the username for proxy authentication.
1321	 *
1322	 * @since 2.8
1323	 *
1324	 * @return string
1325	 */
1326	function username() {
1327		if ( defined('WP_PROXY_USERNAME') )
1328			return WP_PROXY_USERNAME;
1329
1330		return '';
1331	}
1332
1333	/**
1334	 * Retrieve the password for proxy authentication.
1335	 *
1336	 * @since 2.8
1337	 *
1338	 * @return string
1339	 */
1340	function password() {
1341		if ( defined('WP_PROXY_PASSWORD') )
1342			return WP_PROXY_PASSWORD;
1343
1344		return '';
1345	}
1346
1347	/**
1348	 * Retrieve authentication string for proxy authentication.
1349	 *
1350	 * @since 2.8
1351	 *
1352	 * @return string
1353	 */
1354	function authentication() {
1355		return $this->username() . ':' . $this->password();
1356	}
1357
1358	/**
1359	 * Retrieve header string for proxy authentication.
1360	 *
1361	 * @since 2.8
1362	 *
1363	 * @return string
1364	 */
1365	function authentication_header() {
1366		return 'Proxy-Authorization: Basic ' . base64_encode( $this->authentication() );
1367	}
1368
1369	/**
1370	 * Whether URL should be sent through the proxy server.
1371	 *
1372	 * We want to keep localhost and the blog URL from being sent through the proxy server, because
1373	 * some proxies can not handle this. We also have the constant available for defining other
1374	 * hosts that won't be sent through the proxy.
1375	 *
1376	 * @uses WP_PROXY_BYPASS_HOSTS
1377	 * @since 2.8.0
1378	 *
1379	 * @param string $uri URI to check.
1380	 * @return bool True, to send through the proxy and false if, the proxy should not be used.
1381	 */
1382	function send_through_proxy( $uri ) {
1383		// parse_url() only handles http, https type URLs, and will emit E_WARNING on failure.
1384		// This will be displayed on blogs, which is not reasonable.
1385		$check = @parse_url($uri);
1386
1387		// Malformed URL, can not process, but this could mean ssl, so let through anyway.
1388		if ( $check === false )
1389			return true;
1390
1391		$home = parse_url( get_option('siteurl') );
1392
1393		$result = apply_filters( 'pre_http_send_through_proxy', null, $uri, $check, $home );
1394		if ( ! is_null( $result ) )
1395			return $result;
1396
1397		if ( $check['host'] == 'localhost' || $check['host'] == $home['host'] )
1398			return false;
1399
1400		if ( !defined('WP_PROXY_BYPASS_HOSTS') )
1401			return true;
1402
1403		static $bypass_hosts;
1404		static $wildcard_regex = false;
1405		if ( null == $bypass_hosts ) {
1406			$bypass_hosts = preg_split('|,\s*|', WP_PROXY_BYPASS_HOSTS);
1407
1408			if ( false !== strpos(WP_PROXY_BYPASS_HOSTS, '*') ) {
1409				$wildcard_regex = array();
1410				foreach ( $bypass_hosts as $host )
1411					$wildcard_regex[] = str_replace('\*', '[\w.]+?', preg_quote($host, '/'));
1412				$wildcard_regex = '/^(' . implode('|', $wildcard_regex) . ')$/i';
1413			}
1414		}
1415
1416		if ( !empty($wildcard_regex) )
1417			return !preg_match($wildcard_regex, $check['host']);
1418		else
1419			return !in_array( $check['host'], $bypass_hosts );
1420	}
1421}
1422/**
1423 * Internal representation of a single cookie.
1424 *
1425 * Returned cookies are represented using this class, and when cookies are set, if they are not
1426 * already a WP_Http_Cookie() object, then they are turned into one.
1427 *
1428 * @todo The WordPress convention is to use underscores instead of camelCase for function and method
1429 * names. Need to switch to use underscores instead for the methods.
1430 *
1431 * @package WordPress
1432 * @subpackage HTTP
1433 * @since 2.8.0
1434 */
1435class WP_Http_Cookie {
1436
1437	/**
1438	 * Cookie name.
1439	 *
1440	 * @since 2.8.0
1441	 * @var string
1442	 */
1443	var $name;
1444
1445	/**
1446	 * Cookie value.
1447	 *
1448	 * @since 2.8.0
1449	 * @var string
1450	 */
1451	var $value;
1452
1453	/**
1454	 * When the cookie expires.
1455	 *
1456	 * @since 2.8.0
1457	 * @var string
1458	 */
1459	var $expires;
1460
1461	/**
1462	 * Cookie URL path.
1463	 *
1464	 * @since 2.8.0
1465	 * @var string
1466	 */
1467	var $path;
1468
1469	/**
1470	 * Cookie Domain.
1471	 *
1472	 * @since 2.8.0
1473	 * @var string
1474	 */
1475	var $domain;
1476
1477	/**
1478	 * Sets up this cookie object.
1479	 *
1480	 * The parameter $data should be either an associative array containing the indices names below
1481	 * or a header string detailing it.
1482	 *
1483	 * If it's an array, it should include the following elements:
1484	 * <ol>
1485	 * <li>Name</li>
1486	 * <li>Value - should NOT be urlencoded already.</li>
1487	 * <li>Expires - (optional) String or int (UNIX timestamp).</li>
1488	 * <li>Path (optional)</li>
1489	 * <li>Domain (optional)</li>
1490	 * </ol>
1491	 *
1492	 * @access public
1493	 * @since 2.8.0
1494	 *
1495	 * @param string|array $data Raw cookie data.
1496	 */
1497	function __construct( $data ) {
1498		if ( is_string( $data ) ) {
1499			// Assume it's a header string direct from a previous request
1500			$pairs = explode( ';', $data );
1501
1502			// Special handling for first pair; name=value. Also be careful of "=" in value
1503			$name  = trim( sub…

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