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1 <?php 2 // Last sync [WP11537] 3 4 /** 5 * Simple and uniform HTTP request API. 6 * 7 * Will eventually replace and standardize the WordPress HTTP requests made. 8 * 9 * @link http://trac.wordpress.org/ticket/4779 HTTP API Proposal 10 * 11 * @package WordPress 12 * @subpackage HTTP 13 * @since 2.7.0 14 * @author Jacob Santos <wordpress@santosj.name> 15 */ 16 17 /** 18 * WordPress HTTP Class for managing HTTP Transports and making HTTP requests. 19 * 20 * This class is called for the functionality of making HTTP requests and should replace Snoopy 21 * functionality, eventually. There is no available functionality to add HTTP transport 22 * implementations, since most of the HTTP transports are added and available for use. 23 * 24 * The exception is that cURL is not available as a transport and lacking an implementation. It will 25 * be added later and should be a patch on the WordPress Trac. 26 * 27 * There are no properties, because none are needed and for performance reasons. Some of the 28 * functions are static and while they do have some overhead over functions in PHP4, the purpose is 29 * maintainability. When PHP5 is finally the requirement, it will be easy to add the static keyword 30 * to the code. It is not as easy to convert a function to a method after enough code uses the old 31 * way. 32 * 33 * Debugging includes several actions, which pass different variables for debugging the HTTP API. 34 * 35 * <strong>http_transport_get_debug</strong> - gives working, nonblocking, and blocking transports. 36 * 37 * <strong>http_transport_post_debug</strong> - gives working, nonblocking, and blocking transports. 38 * 39 * @package WordPress 40 * @subpackage HTTP 41 * @since 2.7.0 42 */ 43 class WP_Http { 44 45 /** 46 * PHP4 style Constructor - Calls PHP5 Style Constructor 47 * 48 * @since 2.7.0 49 * @return WP_Http 50 */ 51 function WP_Http() { 52 self::__construct(); 53 } 54 55 /** 56 * PHP5 style Constructor - Setup available transport if not available. 57 * 58 * PHP4 does not have the 'self' keyword and since WordPress supports PHP4, 59 * the class needs to be used for the static call. 60 * 61 * The transport are setup to save time. This should only be called once, so 62 * the overhead should be fine. 63 * 64 * @since 2.7.0 65 * @return WP_Http 66 */ 67 function __construct() { 68 WP_Http::_getTransport(); 69 WP_Http::_postTransport(); 70 } 71 72 /** 73 * Tests the WordPress HTTP objects for an object to use and returns it. 74 * 75 * Tests all of the objects and returns the object that passes. Also caches 76 * that object to be used later. 77 * 78 * The order for the GET/HEAD requests are HTTP Extension, FSockopen Streams, 79 * Fopen, and finally cURL. Whilst Fsockopen has the highest overhead, Its 80 * used 2nd due to high compatibility with most hosts, The HTTP Extension is 81 * tested first due to hosts which have it enabled, are likely to work 82 * correctly with it. 83 * 84 * There are currently issues with "localhost" not resolving correctly with 85 * DNS. This may cause an error "failed to open stream: A connection attempt 86 * failed because the connected party did not properly respond after a 87 * period of time, or established connection failed because connected host 88 * has failed to respond." 89 * 90 * @since 2.7.0 91 * @access private 92 * 93 * @param array $args Request args, default us an empty array 94 * @return object|null Null if no transports are available, HTTP transport object. 95 */ 96 function &_getTransport( $args = array() ) { 97 static $working_transport, $blocking_transport, $nonblocking_transport; 98 99 if ( is_null($working_transport) ) { 100 if ( true === WP_Http_ExtHttp::test($args) ) { 101 $working_transport['exthttp'] = new WP_Http_ExtHttp(); 102 $blocking_transport[] = &$working_transport['exthttp']; 103 } else if ( true === WP_Http_Fsockopen::test($args) ) { 104 $working_transport['fsockopen'] = new WP_Http_Fsockopen(); 105 $blocking_transport[] = &$working_transport['fsockopen']; 106 } else if ( true === WP_Http_Streams::test($args) ) { 107 $working_transport['streams'] = new WP_Http_Streams(); 108 $blocking_transport[] = &$working_transport['streams']; 109 } else if ( true === WP_Http_Fopen::test($args) ) { 110 $working_transport['fopen'] = new WP_Http_Fopen(); 111 $blocking_transport[] = &$working_transport['fopen']; 112 } else if ( true === WP_Http_Curl::test($args) ) { 113 $working_transport['curl'] = new WP_Http_Curl(); 114 $blocking_transport[] = &$working_transport['curl']; 115 } 116 117 foreach ( array('curl', 'streams', 'fopen', 'fsockopen', 'exthttp') as $transport ) { 118 if ( isset($working_transport[$transport]) ) 119 $nonblocking_transport[] = &$working_transport[$transport]; 120 } 121 } 122 123 if ( has_filter('http_transport_get_debug') ) 124 do_action('http_transport_get_debug', $working_transport, $blocking_transport, $nonblocking_transport); 125 126 if ( isset($args['blocking']) && !$args['blocking'] ) 127 return $nonblocking_transport; 128 else 129 return $blocking_transport; 130 } 131 132 /** 133 * Tests the WordPress HTTP objects for an object to use and returns it. 134 * 135 * Tests all of the objects and returns the object that passes. Also caches 136 * that object to be used later. This is for posting content to a URL and 137 * is used when there is a body. The plain Fopen Transport can not be used 138 * to send content, but the streams transport can. This is a limitation that 139 * is addressed here, by just not including that transport. 140 * 141 * @since 2.7.0 142 * @access private 143 * 144 * @param array $args Request args, default us an empty array 145 * @return object|null Null if no transports are available, HTTP transport object. 146 */ 147 function &_postTransport( $args = array() ) { 148 static $working_transport, $blocking_transport, $nonblocking_transport; 149 150 if ( is_null($working_transport) ) { 151 if ( true === WP_Http_ExtHttp::test($args) ) { 152 $working_transport['exthttp'] = new WP_Http_ExtHttp(); 153 $blocking_transport[] = &$working_transport['exthttp']; 154 } else if ( true === WP_Http_Fsockopen::test($args) ) { 155 $working_transport['fsockopen'] = new WP_Http_Fsockopen(); 156 $blocking_transport[] = &$working_transport['fsockopen']; 157 } else if ( true === WP_Http_Streams::test($args) ) { 158 $working_transport['streams'] = new WP_Http_Streams(); 159 $blocking_transport[] = &$working_transport['streams']; 160 } else if ( true === WP_Http_Curl::test($args) ) { 161 $working_transport['curl'] = new WP_Http_Curl(); 162 $blocking_transport[] = &$working_transport['curl']; 163 } 164 165 foreach ( array('curl', 'streams', 'fsockopen', 'exthttp') as $transport ) { 166 if ( isset($working_transport[$transport]) ) 167 $nonblocking_transport[] = &$working_transport[$transport]; 168 } 169 } 170 171 if ( has_filter('http_transport_post_debug') ) 172 do_action('http_transport_post_debug', $working_transport, $blocking_transport, $nonblocking_transport); 173 174 if ( isset($args['blocking']) && !$args['blocking'] ) 175 return $nonblocking_transport; 176 else 177 return $blocking_transport; 178 } 179 180 /** 181 * Send a HTTP request to a URI. 182 * 183 * The body and headers are part of the arguments. The 'body' argument is for the body and will 184 * accept either a string or an array. The 'headers' argument should be an array, but a string 185 * is acceptable. If the 'body' argument is an array, then it will automatically be escaped 186 * using http_build_query(). 187 * 188 * The only URI that are supported in the HTTP Transport implementation are the HTTP and HTTPS 189 * protocols. HTTP and HTTPS are assumed so the server might not know how to handle the send 190 * headers. Other protocols are unsupported and most likely will fail. 191 * 192 * The defaults are 'method', 'timeout', 'redirection', 'httpversion', 'blocking' and 193 * 'user-agent'. 194 * 195 * Accepted 'method' values are 'GET', 'POST', and 'HEAD', some transports technically allow 196 * others, but should not be assumed. The 'timeout' is used to sent how long the connection 197 * should stay open before failing when no response. 'redirection' is used to track how many 198 * redirects were taken and used to sent the amount for other transports, but not all transports 199 * accept setting that value. 200 * 201 * The 'httpversion' option is used to sent the HTTP version and accepted values are '1.0', and 202 * '1.1' and should be a string. Version 1.1 is not supported, because of chunk response. The 203 * 'user-agent' option is the user-agent and is used to replace the default user-agent, which is 204 * 'WordPress/WP_Version', where WP_Version is the value from $wp_version. 205 * 206 * 'blocking' is the default, which is used to tell the transport, whether it should halt PHP 207 * while it performs the request or continue regardless. Actually, that isn't entirely correct. 208 * Blocking mode really just means whether the fread should just pull what it can whenever it 209 * gets bytes or if it should wait until it has enough in the buffer to read or finishes reading 210 * the entire content. It doesn't actually always mean that PHP will continue going after making 211 * the request. 212 * 213 * @access public 214 * @since 2.7.0 215 * 216 * @param string $url URI resource. 217 * @param str|array $args Optional. Override the defaults. 218 * @return array containing 'headers', 'body', 'response', 'cookies' 219 */ 220 function request( $url, $args = array() ) { 221 $defaults = array( 222 'method' => 'GET', 223 'timeout' => apply_filters( 'http_request_timeout', 5), 224 'redirection' => apply_filters( 'http_request_redirection_count', 5), 225 'httpversion' => apply_filters( 'http_request_version', '1.0'), 226 'user-agent' => apply_filters( 'http_headers_useragent', backpress_get_option( 'wp_http_version' ) ), 227 'blocking' => true, 228 'headers' => array(), 229 'cookies' => array(), 230 'body' => null, 231 'compress' => false, 232 'decompress' => true, 233 'sslverify' => true 234 ); 235 236 $r = wp_parse_args( $args, $defaults ); 237 $r = apply_filters( 'http_request_args', $r, $url ); 238 239 $arrURL = parse_url($url); 240 241 if ( $this->block_request( $url ) ) 242 return new WP_Error('http_request_failed', 'User has blocked requests through HTTP.'); 243 244 // Determine if this is a https call and pass that on to the transport functions 245 // so that we can blacklist the transports that do not support ssl verification 246 $r['ssl'] = $arrURL['scheme'] == 'https' || $arrURL['scheme'] == 'ssl'; 247 248 // Determine if this request is to OUR install of WordPress 249 $homeURL = parse_url( backpress_get_option( 'application_uri' ) ); 250 $r['local'] = $homeURL['host'] == $arrURL['host'] || 'localhost' == $arrURL['host']; 251 unset($homeURL); 252 253 if ( is_null( $r['headers'] ) ) 254 $r['headers'] = array(); 255 256 if ( ! is_array($r['headers']) ) { 257 $processedHeaders = WP_Http::processHeaders($r['headers']); 258 $r['headers'] = $processedHeaders['headers']; 259 } 260 261 if ( isset($r['headers']['User-Agent']) ) { 262 $r['user-agent'] = $r['headers']['User-Agent']; 263 unset($r['headers']['User-Agent']); 264 } 265 266 if ( isset($r['headers']['user-agent']) ) { 267 $r['user-agent'] = $r['headers']['user-agent']; 268 unset($r['headers']['user-agent']); 269 } 270 271 // Construct Cookie: header if any cookies are set 272 WP_Http::buildCookieHeader( $r ); 273 274 if ( WP_Http_Encoding::is_available() ) 275 $r['headers']['Accept-Encoding'] = WP_Http_Encoding::accept_encoding(); 276 277 if ( is_null($r['body']) ) { 278 // Some servers fail when sending content without the content-length 279 // header being set. 280 $r['headers']['Content-Length'] = 0; 281 $transports = WP_Http::_getTransport($r); 282 } else { 283 if ( is_array( $r['body'] ) || is_object( $r['body'] ) ) { 284 if ( ! version_compare(phpversion(), '5.1.2', '>=') ) 285 $r['body'] = _http_build_query($r['body'], null, '&'); 286 else 287 $r['body'] = http_build_query($r['body'], null, '&'); 288 $r['headers']['Content-Type'] = 'application/x-www-form-urlencoded; charset=' . backpress_get_option( 'charset' ); 289 $r['headers']['Content-Length'] = strlen($r['body']); 290 } 291 292 if ( ! isset( $r['headers']['Content-Length'] ) && ! isset( $r['headers']['content-length'] ) ) 293 $r['headers']['Content-Length'] = strlen($r['body']); 294 295 $transports = WP_Http::_postTransport($r); 296 } 297 298 if ( has_action('http_api_debug') ) 299 do_action('http_api_debug', $transports, 'transports_list'); 300 301 $response = array( 'headers' => array(), 'body' => '', 'response' => array('code' => false, 'message' => false), 'cookies' => array() ); 302 foreach ( (array) $transports as $transport ) { 303 $response = $transport->request($url, $r); 304 305 if ( has_action('http_api_debug') ) 306 do_action( 'http_api_debug', $response, 'response', get_class($transport) ); 307 308 if ( ! is_wp_error($response) ) 309 return $response; 310 } 311 312 return $response; 313 } 314 315 /** 316 * Uses the POST HTTP method. 317 * 318 * Used for sending data that is expected to be in the body. 319 * 320 * @access public 321 * @since 2.7.0 322 * 323 * @param string $url URI resource. 324 * @param str|array $args Optional. Override the defaults. 325 * @return boolean 326 */ 327 function post($url, $args = array()) { 328 $defaults = array('method' => 'POST'); 329 $r = wp_parse_args( $args, $defaults ); 330 return $this->request($url, $r); 331 } 332 333 /** 334 * Uses the GET HTTP method. 335 * 336 * Used for sending data that is expected to be in the body. 337 * 338 * @access public 339 * @since 2.7.0 340 * 341 * @param string $url URI resource. 342 * @param str|array $args Optional. Override the defaults. 343 * @return boolean 344 */ 345 function get($url, $args = array()) { 346 $defaults = array('method' => 'GET'); 347 $r = wp_parse_args( $args, $defaults ); 348 return $this->request($url, $r); 349 } 350 351 /** 352 * Uses the HEAD HTTP method. 353 * 354 * Used for sending data that is expected to be in the body. 355 * 356 * @access public 357 * @since 2.7.0 358 * 359 * @param string $url URI resource. 360 * @param str|array $args Optional. Override the defaults. 361 * @return boolean 362 */ 363 function head($url, $args = array()) { 364 $defaults = array('method' => 'HEAD'); 365 $r = wp_parse_args( $args, $defaults ); 366 return $this->request($url, $r); 367 } 368 369 /** 370 * Parses the responses and splits the parts into headers and body. 371 * 372 * @access public 373 * @static 374 * @since 2.7.0 375 * 376 * @param string $strResponse The full response string 377 * @return array Array with 'headers' and 'body' keys. 378 */ 379 function processResponse($strResponse) { 380 list($theHeaders, $theBody) = explode("\r\n\r\n", $strResponse, 2); 381 return array('headers' => $theHeaders, 'body' => $theBody); 382 } 383 384 /** 385 * Transform header string into an array. 386 * 387 * If an array is given then it is assumed to be raw header data with numeric keys with the 388 * headers as the values. No headers must be passed that were already processed. 389 * 390 * @access public 391 * @static 392 * @since 2.7.0 393 * 394 * @param string|array $headers 395 * @return array Processed string headers. If duplicate headers are encountered, 396 * Then a numbered array is returned as the value of that header-key. 397 */ 398 function processHeaders($headers) { 399 // split headers, one per array element 400 if ( is_string($headers) ) { 401 // tolerate line terminator: CRLF = LF (RFC 2616 19.3) 402 $headers = str_replace("\r\n", "\n", $headers); 403 // unfold folded header fields. LWS = [CRLF] 1*( SP | HT ) <US-ASCII SP, space (32)>, <US-ASCII HT, horizontal-tab (9)> (RFC 2616 2.2) 404 $headers = preg_replace('/\n[ \t]/', ' ', $headers); 405 // create the headers array 406 $headers = explode("\n", $headers); 407 } 408 409 $response = array('code' => 0, 'message' => ''); 410 411 $cookies = array(); 412 $newheaders = array(); 413 foreach ( $headers as $tempheader ) { 414 if ( empty($tempheader) ) 415 continue; 416 417 if ( false === strpos($tempheader, ':') ) { 418 list( , $iResponseCode, $strResponseMsg) = explode(' ', $tempheader, 3); 419 $response['code'] = $iResponseCode; 420 $response['message'] = $strResponseMsg; 421 continue; 422 } 423 424 list($key, $value) = explode(':', $tempheader, 2); 425 426 if ( !empty( $value ) ) { 427 $key = strtolower( $key ); 428 if ( isset( $newheaders[$key] ) ) { 429 $newheaders[$key] = array( $newheaders[$key], trim( $value ) ); 430 } else { 431 $newheaders[$key] = trim( $value ); 432 } 433 if ( 'set-cookie' == strtolower( $key ) ) 434 $cookies[] = new WP_Http_Cookie( $value ); 435 } 436 } 437 438 return array('response' => $response, 'headers' => $newheaders, 'cookies' => $cookies); 439 } 440 441 /** 442 * Takes the arguments for a ::request() and checks for the cookie array. 443 * 444 * If it's found, then it's assumed to contain WP_Http_Cookie objects, which are each parsed 445 * into strings and added to the Cookie: header (within the arguments array). Edits the array by 446 * reference. 447 * 448 * @access public 449 * @version 2.8.0 450 * @static 451 * 452 * @param array $r Full array of args passed into ::request() 453 */ 454 function buildCookieHeader( &$r ) { 455 if ( ! empty($r['cookies']) ) { 456 $cookies_header = ''; 457 foreach ( (array) $r['cookies'] as $cookie ) { 458 $cookies_header .= $cookie->getHeaderValue() . '; '; 459 } 460 $cookies_header = substr( $cookies_header, 0, -2 ); 461 $r['headers']['cookie'] = $cookies_header; 462 } 463 } 464 465 /** 466 * Decodes chunk transfer-encoding, based off the HTTP 1.1 specification. 467 * 468 * Based off the HTTP http_encoding_dechunk function. Does not support UTF-8. Does not support 469 * returning footer headers. Shouldn't be too difficult to support it though. 470 * 471 * @todo Add support for footer chunked headers. 472 * @access public 473 * @since 2.7.0 474 * @static 475 * 476 * @param string $body Body content 477 * @return string Chunked decoded body on success or raw body on failure. 478 */ 479 function chunkTransferDecode($body) { 480 $body = str_replace(array("\r\n", "\r"), "\n", $body); 481 // The body is not chunked encoding or is malformed. 482 if ( ! preg_match( '/^[0-9a-f]+(\s|\n)+/mi', trim($body) ) ) 483 return $body; 484 485 $parsedBody = ''; 486 //$parsedHeaders = array(); Unsupported 487 488 while ( true ) { 489 $hasChunk = (bool) preg_match( '/^([0-9a-f]+)(\s|\n)+/mi', $body, $match ); 490 491 if ( $hasChunk ) { 492 if ( empty( $match[1] ) ) 493 return $body; 494 495 $length = hexdec( $match[1] ); 496 $chunkLength = strlen( $match[0] ); 497 498 $strBody = substr($body, $chunkLength, $length); 499 $parsedBody .= $strBody; 500 501 $body = ltrim(str_replace(array($match[0], $strBody), '', $body), "\n"); 502 503 if ( "0" == trim($body) ) 504 return $parsedBody; // Ignore footer headers. 505 } else { 506 return $body; 507 } 508 } 509 } 510 511 /** 512 * Block requests through the proxy. 513 * 514 * Those who are behind a proxy and want to prevent access to certain hosts may do so. This will 515 * prevent plugins from working and core functionality, if you don't include api.wordpress.org. 516 * 517 * You block external URL requests by defining WP_HTTP_BLOCK_EXTERNAL in your wp-config.php file 518 * and this will only allow localhost and your blog to make requests. The constant 519 * WP_ACCESSIBLE_HOSTS will allow additional hosts to go through for requests. The format of the 520 * WP_ACCESSIBLE_HOSTS constant is a comma separated list of hostnames to allow. 521 * 522 * @since 2.8.0 523 * @link http://core.trac.wordpress.org/ticket/8927 Allow preventing external requests. 524 * 525 * @param string $uri URI of url. 526 * @return bool True to block, false to allow. 527 */ 528 function block_request($uri) { 529 // We don't need to block requests, because nothing is blocked. 530 if ( ! defined('WP_HTTP_BLOCK_EXTERNAL') || ( defined('WP_HTTP_BLOCK_EXTERNAL') && WP_HTTP_BLOCK_EXTERNAL == false ) ) 531 return false; 532 533 // parse_url() only handles http, https type URLs, and will emit E_WARNING on failure. 534 // This will be displayed on blogs, which is not reasonable. 535 $check = @parse_url($uri); 536 537 /* Malformed URL, can not process, but this could mean ssl, so let through anyway. 538 * 539 * This isn't very security sound. There are instances where a hacker might attempt 540 * to bypass the proxy and this check. However, the reason for this behavior is that 541 * WordPress does not do any checking currently for non-proxy requests, so it is keeps with 542 * the default unsecure nature of the HTTP request. 543 */ 544 if ( $check === false ) 545 return false; 546 547 $home = parse_url( backpress_get_option( 'application_uri' ) ); 548 549 // Don't block requests back to ourselves by default 550 if ( $check['host'] == 'localhost' || $check['host'] == $home['host'] ) 551 return apply_filters('block_local_requests', false); 552 553 if ( !defined('WP_ACCESSIBLE_HOSTS') ) 554 return true; 555 556 static $accessible_hosts; 557 if ( null == $accessible_hosts ) 558 $accessible_hosts = preg_split('|,\s*|', WP_ACCESSIBLE_HOSTS); 559 560 return !in_array( $check['host'], $accessible_hosts ); //Inverse logic, If its in the array, then we can't access it. 561 } 562 } 563 564 /** 565 * HTTP request method uses fsockopen function to retrieve the url. 566 * 567 * This would be the preferred method, but the fsockopen implementation has the most overhead of all 568 * the HTTP transport implementations. 569 * 570 * @package WordPress 571 * @subpackage HTTP 572 * @since 2.7.0 573 */ 574 class WP_Http_Fsockopen { 575 /** 576 * Send a HTTP request to a URI using fsockopen(). 577 * 578 * Does not support non-blocking mode. 579 * 580 * @see WP_Http::request For default options descriptions. 581 * 582 * @since 2.7 583 * @access public 584 * @param string $url URI resource. 585 * @param str|array $args Optional. Override the defaults. 586 * @return array 'headers', 'body', 'cookies' and 'response' keys. 587 */ 588 function request($url, $args = array()) { 589 $defaults = array( 590 'method' => 'GET', 'timeout' => 5, 591 'redirection' => 5, 'httpversion' => '1.0', 592 'blocking' => true, 593 'headers' => array(), 'body' => null, 'cookies' => array() 594 ); 595 596 $r = wp_parse_args( $args, $defaults ); 597 598 if ( isset($r['headers']['User-Agent']) ) { 599 $r['user-agent'] = $r['headers']['User-Agent']; 600 unset($r['headers']['User-Agent']); 601 } else if( isset($r['headers']['user-agent']) ) { 602 $r['user-agent'] = $r['headers']['user-agent']; 603 unset($r['headers']['user-agent']); 604 } 605 606 // Construct Cookie: header if any cookies are set 607 WP_Http::buildCookieHeader( $r ); 608 609 $iError = null; // Store error number 610 $strError = null; // Store error string 611 612 $arrURL = parse_url($url); 613 614 $fsockopen_host = $arrURL['host']; 615 616 $secure_transport = false; 617 618 if ( ! isset( $arrURL['port'] ) ) { 619 if ( ( $arrURL['scheme'] == 'ssl' || $arrURL['scheme'] == 'https' ) && extension_loaded('openssl') ) { 620 $fsockopen_host = "ssl://$fsockopen_host"; 621 $arrURL['port'] = 443; 622 $secure_transport = true; 623 } else { 624 $arrURL['port'] = 80; 625 } 626 } 627 628 // There are issues with the HTTPS and SSL protocols that cause errors that can be safely 629 // ignored and should be ignored. 630 if ( true === $secure_transport ) 631 $error_reporting = error_reporting(0); 632 633 $startDelay = time(); 634 635 $proxy = new WP_HTTP_Proxy(); 636 637 if ( !defined('WP_DEBUG') || ( defined('WP_DEBUG') && false === WP_DEBUG ) ) { 638 if ( $proxy->is_enabled() && $proxy->send_through_proxy( $url ) ) 639 $handle = @fsockopen( $proxy->host(), $proxy->port(), $iError, $strError, $r['timeout'] ); 640 else 641 $handle = @fsockopen( $fsockopen_host, $arrURL['port'], $iError, $strError, $r['timeout'] ); 642 } else { 643 if ( $proxy->is_enabled() && $proxy->send_through_proxy( $url ) ) 644 $handle = fsockopen( $proxy->host(), $proxy->port(), $iError, $strError, $r['timeout'] ); 645 else 646 $handle = fsockopen( $fsockopen_host, $arrURL['port'], $iError, $strError, $r['timeout'] ); 647 } 648 649 $endDelay = time(); 650 651 // If the delay is greater than the timeout then fsockopen should't be used, because it will 652 // cause a long delay. 653 $elapseDelay = ($endDelay-$startDelay) > $r['timeout']; 654 if ( true === $elapseDelay ) 655 backpress_add_option( 'disable_fsockopen', $endDelay, null, true ); 656 657 if ( false === $handle ) 658 return new WP_Error('http_request_failed', $iError . ': ' . $strError); 659 660 stream_set_timeout($handle, $r['timeout'] ); 661 662 if ( $proxy->is_enabled() && $proxy->send_through_proxy( $url ) ) //Some proxies require full URL in this field. 663 $requestPath = $url; 664 else 665 $requestPath = $arrURL['path'] . ( isset($arrURL['query']) ? '?' . $arrURL['query'] : '' ); 666 667 if ( empty($requestPath) ) 668 $requestPath .= '/'; 669 670 $strHeaders = strtoupper($r['method']) . ' ' . $requestPath . ' HTTP/' . $r['httpversion'] . "\r\n"; 671 672 if ( $proxy->is_enabled() && $proxy->send_through_proxy( $url ) ) 673 $strHeaders .= 'Host: ' . $arrURL['host'] . ':' . $arrURL['port'] . "\r\n"; 674 else 675 $strHeaders .= 'Host: ' . $arrURL['host'] . "\r\n"; 676 677 if ( isset($r['user-agent']) ) 678 $strHeaders .= 'User-agent: ' . $r['user-agent'] . "\r\n"; 679 680 if ( is_array($r['headers']) ) { 681 foreach ( (array) $r['headers'] as $header => $headerValue ) 682 $strHeaders .= $header . ': ' . $headerValue . "\r\n"; 683 } else { 684 $strHeaders .= $r['headers']; 685 } 686 687 if ( $proxy->use_authentication() ) 688 $strHeaders .= $proxy->authentication_header() . "\r\n"; 689 690 $strHeaders .= "\r\n"; 691 692 if ( ! is_null($r['body']) ) 693 $strHeaders .= $r['body']; 694 695 fwrite($handle, $strHeaders); 696 697 if ( ! $r['blocking'] ) { 698 fclose($handle); 699 return array( 'headers' => array(), 'body' => '', 'response' => array('code' => false, 'message' => false), 'cookies' => array() ); 700 } 701 702 $strResponse = ''; 703 while ( ! feof($handle) ) 704 $strResponse .= fread($handle, 4096); 705 706 fclose($handle); 707 708 if ( true === $secure_transport ) 709 error_reporting($error_reporting); 710 711 $process = WP_Http::processResponse($strResponse); 712 $arrHeaders = WP_Http::processHeaders($process['headers']); 713 714 // Is the response code within the 400 range? 715 if ( (int) $arrHeaders['response']['code'] >= 400 && (int) $arrHeaders['response']['code'] < 500 ) 716 return new WP_Error('http_request_failed', $arrHeaders['response']['code'] . ': ' . $arrHeaders['response']['message']); 717 718 // If location is found, then assume redirect and redirect to location. 719 if ( isset($arrHeaders['headers']['location']) ) { 720 if ( $r['redirection']-- > 0 ) { 721 return $this->request($arrHeaders['headers']['location'], $r); 722 } else { 723 return new WP_Error('http_request_failed', __('Too many redirects.')); 724 } 725 } 726 727 // If the body was chunk encoded, then decode it. 728 if ( ! empty( $process['body'] ) && isset( $arrHeaders['headers']['transfer-encoding'] ) && 'chunked' == $arrHeaders['headers']['transfer-encoding'] ) 729 $process['body'] = WP_Http::chunkTransferDecode($process['body']); 730 731 if ( true === $r['decompress'] && true === WP_Http_Encoding::should_decode($arrHeaders['headers']) ) 732 $process['body'] = WP_Http_Encoding::decompress( $process['body'] ); 733 734 return array('headers' => $arrHeaders['headers'], 'body' => $process['body'], 'response' => $arrHeaders['response'], 'cookies' => $arrHeaders['cookies']); 735 } 736 737 /** 738 * Whether this class can be used for retrieving an URL. 739 * 740 * @since 2.7.0 741 * @static 742 * @return boolean False means this class can not be used, true means it can. 743 */ 744 function test( $args = array() ) { 745 if ( false !== ($option = backpress_get_option( 'disable_fsockopen' )) && time()-$option < 43200 ) // 12 hours 746 return false; 747 748 $is_ssl = isset($args['ssl']) && $args['ssl']; 749 750 if ( ! $is_ssl && function_exists( 'fsockopen' ) ) 751 $use = true; 752 elseif ( $is_ssl && extension_loaded('openssl') && function_exists( 'fsockopen' ) ) 753 $use = true; 754 else 755 $use = false; 756 757 return apply_filters('use_fsockopen_transport', $use, $args); 758 } 759 } 760 761 /** 762 * HTTP request method uses fopen function to retrieve the url. 763 * 764 * Requires PHP version greater than 4.3.0 for stream support. Does not allow for $context support, 765 * but should still be okay, to write the headers, before getting the response. Also requires that 766 * 'allow_url_fopen' to be enabled. 767 * 768 * @package WordPress 769 * @subpackage HTTP 770 * @since 2.7.0 771 */ 772 class WP_Http_Fopen { 773 /** 774 * Send a HTTP request to a URI using fopen(). 775 * 776 * This transport does not support sending of headers and body, therefore should not be used in 777 * the instances, where there is a body and headers. 778 * 779 * Notes: Does not support non-blocking mode. Ignores 'redirection' option. 780 * 781 * @see WP_Http::retrieve For default options descriptions. 782 * 783 * @access public 784 * @since 2.7.0 785 * 786 * @param string $url URI resource. 787 * @param str|array $args Optional. Override the defaults. 788 * @return array 'headers', 'body', 'cookies' and 'response' keys. 789 */ 790 function request($url, $args = array()) { 791 $defaults = array( 792 'method' => 'GET', 'timeout' => 5, 793 'redirection' => 5, 'httpversion' => '1.0', 794 'blocking' => true, 795 'headers' => array(), 'body' => null, 'cookies' => array() 796 ); 797 798 $r = wp_parse_args( $args, $defaults ); 799 800 $arrURL = parse_url($url); 801 802 if ( false === $arrURL ) 803 return new WP_Error('http_request_failed', sprintf(__('Malformed URL: %s'), $url)); 804 805 if ( 'http' != $arrURL['scheme'] && 'https' != $arrURL['scheme'] ) 806 $url = str_replace($arrURL['scheme'], 'http', $url); 807 808 if ( !defined('WP_DEBUG') || ( defined('WP_DEBUG') && false === WP_DEBUG ) ) 809 $handle = @fopen($url, 'r'); 810 else 811 $handle = fopen($url, 'r'); 812 813 if (! $handle) 814 return new WP_Error('http_request_failed', sprintf(__('Could not open handle for fopen() to %s'), $url)); 815 816 stream_set_timeout($handle, $r['timeout'] ); 817 818 if ( ! $r['blocking'] ) { 819 fclose($handle); 820 return array( 'headers' => array(), 'body' => '', 'response' => array('code' => false, 'message' => false), 'cookies' => array() ); 821 } 822 823 $strResponse = ''; 824 while ( ! feof($handle) ) 825 $strResponse .= fread($handle, 4096); 826 827 if ( function_exists('stream_get_meta_data') ) { 828 $meta = stream_get_meta_data($handle); 829 $theHeaders = $meta['wrapper_data']; 830 if ( isset( $meta['wrapper_data']['headers'] ) ) 831 $theHeaders = $meta['wrapper_data']['headers']; 832 } else { 833 //$http_response_header is a PHP reserved variable which is set in the current-scope when using the HTTP Wrapper 834 //see http://php.oregonstate.edu/manual/en/reserved.variables.httpresponseheader.php 835 $theHeaders = $http_response_header; 836 } 837 838 fclose($handle); 839 840 $processedHeaders = WP_Http::processHeaders($theHeaders); 841 842 if ( ! empty( $strResponse ) && isset( $processedHeaders['headers']['transfer-encoding'] ) && 'chunked' == $processedHeaders['headers']['transfer-encoding'] ) 843 $strResponse = WP_Http::chunkTransferDecode($strResponse); 844 845 if ( true === $r['decompress'] && true === WP_Http_Encoding::should_decode($processedHeaders['headers']) ) 846 $strResponse = WP_Http_Encoding::decompress( $strResponse ); 847 848 return array('headers' => $processedHeaders['headers'], 'body' => $strResponse, 'response' => $processedHeaders['response'], 'cookies' => $processedHeaders['cookies']); 849 } 850 851 /** 852 * Whether this class can be used for retrieving an URL. 853 * 854 * @since 2.7.0 855 * @static 856 * @return boolean False means this class can not be used, true means it can. 857 */ 858 function test($args = array()) { 859 if ( ! function_exists('fopen') || (function_exists('ini_get') && true != ini_get('allow_url_fopen')) ) 860 return false; 861 862 $use = true; 863 864 //PHP does not verify SSL certs, We can only make a request via this transports if SSL Verification is turned off. 865 $is_ssl = isset($args['ssl']) && $args['ssl']; 866 if ( $is_ssl ) { 867 $is_local = isset($args['local']) && $args['local']; 868 $ssl_verify = isset($args['sslverify']) && $args['sslverify']; 869 if ( $is_local && true != apply_filters('https_local_ssl_verify', true) ) 870 $use = true; 871 elseif ( !$is_local && true != apply_filters('https_ssl_verify', true) ) 872 $use = true; 873 elseif ( !$ssl_verify ) 874 $use = true; 875 else 876 $use = false; 877 } 878 879 return apply_filters('use_fopen_transport', $use, $args); 880 } 881 } 882 883 /** 884 * HTTP request method uses Streams to retrieve the url. 885 * 886 * Requires PHP 5.0+ and uses fopen with stream context. Requires that 'allow_url_fopen' PHP setting 887 * to be enabled. 888 * 889 * Second preferred method for getting the URL, for PHP 5. 890 * 891 * @package WordPress 892 * @subpackage HTTP 893 * @since 2.7.0 894 */ 895 class WP_Http_Streams { 896 /** 897 * Send a HTTP request to a URI using streams with fopen(). 898 * 899 * @access public 900 * @since 2.7.0 901 * 902 * @param string $url 903 * @param str|array $args Optional. Override the defaults. 904 * @return array 'headers', 'body', 'cookies' and 'response' keys. 905 */ 906 function request($url, $args = array()) { 907 $defaults = array( 908 'method' => 'GET', 'timeout' => 5, 909 'redirection' => 5, 'httpversion' => '1.0', 910 'blocking' => true, 911 'headers' => array(), 'body' => null, 'cookies' => array() 912 ); 913 914 $r = wp_parse_args( $args, $defaults ); 915 916 if ( isset($r['headers']['User-Agent']) ) { 917 $r['user-agent'] = $r['headers']['User-Agent']; 918 unset($r['headers']['User-Agent']); 919 } else if( isset($r['headers']['user-agent']) ) { 920 $r['user-agent'] = $r['headers']['user-agent']; 921 unset($r['headers']['user-agent']); 922 } 923 924 // Construct Cookie: header if any cookies are set 925 WP_Http::buildCookieHeader( $r ); 926 927 $arrURL = parse_url($url); 928 929 if ( false === $arrURL ) 930 return new WP_Error('http_request_failed', sprintf(__('Malformed URL: %s'), $url)); 931 932 if ( 'http' != $arrURL['scheme'] && 'https' != $arrURL['scheme'] ) 933 $url = preg_replace('|^' . preg_quote($arrURL['scheme'], '|') . '|', 'http', $url); 934 935 // Convert Header array to string. 936 $strHeaders = ''; 937 if ( is_array( $r['headers'] ) ) 938 foreach ( $r['headers'] as $name => $value ) 939 $strHeaders .= "{$name}: $value\r\n"; 940 else if ( is_string( $r['headers'] ) ) 941 $strHeaders = $r['headers']; 942 943 $is_local = isset($args['local']) && $args['local']; 944 $ssl_verify = isset($args['sslverify']) && $args['sslverify']; 945 if ( $is_local ) 946 $ssl_verify = apply_filters('https_local_ssl_verify', $ssl_verify); 947 elseif ( ! $is_local ) 948 $ssl_verify = apply_filters('https_ssl_verify', $ssl_verify); 949 950 $arrContext = array('http' => 951 array( 952 'method' => strtoupper($r['method']), 953 'user_agent' => $r['user-agent'], 954 'max_redirects' => $r['redirection'], 955 'protocol_version' => (float) $r['httpversion'], 956 'header' => $strHeaders, 957 'timeout' => $r['timeout'], 958 'ssl' => array( 959 'verify_peer' => $ssl_verify, 960 'verify_host' => $ssl_verify 961 ) 962 ) 963 ); 964 965 $proxy = new WP_HTTP_Proxy(); 966 967 if ( $proxy->is_enabled() && $proxy->send_through_proxy( $url ) ) { 968 $arrContext['http']['proxy'] = 'tcp://' . $proxy->host() . ':' . $proxy->port(); 969 $arrContext['http']['request_fulluri'] = true; 970 971 // We only support Basic authentication so this will only work if that is what your proxy supports. 972 if ( $proxy->use_authentication() ) 973 $arrContext['http']['header'] .= $proxy->authentication_header() . "\r\n"; 974 } 975 976 if ( ! is_null($r['body']) && ! empty($r['body'] ) ) 977 $arrContext['http']['content'] = $r['body']; 978 979 $context = stream_context_create($arrContext); 980 981 if ( ! defined('WP_DEBUG') || ( defined('WP_DEBUG') && false === WP_DEBUG ) ) 982 $handle = @fopen($url, 'r', false, $context); 983 else 984 $handle = fopen($url, 'r', false, $context); 985 986 if ( ! $handle) 987 return new WP_Error('http_request_failed', sprintf(__('Could not open handle for fopen() to %s'), $url)); 988 989 // WordPress supports PHP 4.3, which has this function. Removed sanity checking for 990 // performance reasons. 991 stream_set_timeout($handle, $r['timeout'] ); 992 993 if ( ! $r['blocking'] ) { 994 stream_set_blocking($handle, 0); 995 fclose($handle); 996 return array( 'headers' => array(), 'body' => '', 'response' => array('code' => false, 'message' => false), 'cookies' => array() ); 997 } 998 999 $strResponse = stream_get_contents($handle); 1000 $meta = stream_get_meta_data($handle); 1001 1002 fclose($handle); 1003 1004 $processedHeaders = array(); 1005 if ( isset( $meta['wrapper_data']['headers'] ) ) 1006 $processedHeaders = WP_Http::processHeaders($meta['wrapper_data']['headers']); 1007 else 1008 $processedHeaders = WP_Http::processHeaders($meta['wrapper_data']); 1009 1010 if ( ! empty( $strResponse ) && isset( $processedHeaders['headers']['transfer-encoding'] ) && 'chunked' == $processedHeaders['headers']['transfer-encoding'] ) 1011 $strResponse = WP_Http::chunkTransferDecode($strResponse); 1012 1013 if ( true === $r['decompress'] && true === WP_Http_Encoding::should_decode($processedHeaders['headers']) ) 1014 $strResponse = WP_Http_Encoding::decompress( $strResponse ); 1015 1016 return array('headers' => $processedHeaders['headers'], 'body' => $strResponse, 'response' => $processedHeaders['response'], 'cookies' => $processedHeaders['cookies']); 1017 } 1018 1019 /** 1020 * Whether this class can be used for retrieving an URL. 1021 * 1022 * @static 1023 * @access public 1024 * @since 2.7.0 1025 * 1026 * @return boolean False means this class can not be used, true means it can. 1027 */ 1028 function test($args = array()) { 1029 if ( ! function_exists('fopen') || (function_exists('ini_get') && true != ini_get('allow_url_fopen')) ) 1030 return false; 1031 1032 if ( version_compare(PHP_VERSION, '5.0', '<') ) 1033 return false; 1034 1035 //HTTPS via Proxy was added in 5.1.0 1036 $is_ssl = isset($args['ssl']) && $args['ssl']; 1037 if ( $is_ssl && version_compare(PHP_VERSION, '5.1.0', '<') ) { 1038 $proxy = new WP_HTTP_Proxy(); 1039 /** 1040 * No URL check, as its not currently passed to the ::test() function 1041 * In the case where a Proxy is in use, Just bypass this transport for HTTPS. 1042 */ 1043 if ( $proxy->is_enabled() ) 1044 return false; 1045 } 1046 1047 return apply_filters('use_streams_transport', true, $args); 1048 } 1049 } 1050 1051 /** 1052 * HTTP request method uses HTTP extension to retrieve the url. 1053 * 1054 * Requires the HTTP extension to be installed. This would be the preferred transport since it can 1055 * handle a lot of the problems that forces the others to use the HTTP version 1.0. Even if PHP 5.2+ 1056 * is being used, it doesn't mean that the HTTP extension will be enabled. 1057 * 1058 * @package WordPress 1059 * @subpackage HTTP 1060 * @since 2.7.0 1061 */ 1062 class WP_Http_ExtHTTP { 1063 /** 1064 * Send a HTTP request to a URI using HTTP extension. 1065 * 1066 * Does not support non-blocking. 1067 * 1068 * @access public 1069 * @since 2.7 1070 * 1071 * @param string $url 1072 * @param str|array $args Optional. Override the defaults. 1073 * @return array 'headers', 'body', 'cookies' and 'response' keys. 1074 */ 1075 function request($url, $args = array()) { 1076 $defaults = array( 1077 'method' => 'GET', 'timeout' => 5, 1078 'redirection' => 5, 'httpversion' => '1.0', 1079 'blocking' => true, 1080 'headers' => array(), 'body' => null, 'cookies' => array() 1081 ); 1082 1083 $r = wp_parse_args( $args, $defaults ); 1084 1085 if ( isset($r['headers']['User-Agent']) ) { 1086 $r['user-agent'] = $r['headers']['User-Agent']; 1087 unset($r['headers']['User-Agent']); 1088 } else if( isset($r['headers']['user-agent']) ) { 1089 $r['user-agent'] = $r['headers']['user-agent']; 1090 unset($r['headers']['user-agent']); 1091 } 1092 1093 // Construct Cookie: header if any cookies are set 1094 WP_Http::buildCookieHeader( $r ); 1095 1096 switch ( $r['method'] ) { 1097 case 'POST': 1098 $r['method'] = HTTP_METH_POST; 1099 break; 1100 case 'HEAD': 1101 $r['method'] = HTTP_METH_HEAD; 1102 break; 1103 case 'GET': 1104 default: 1105 $r['method'] = HTTP_METH_GET; 1106 } 1107 1108 $arrURL = parse_url($url); 1109 1110 if ( 'http' != $arrURL['scheme'] || 'https' != $arrURL['scheme'] ) 1111 $url = preg_replace('|^' . preg_quote($arrURL['scheme'], '|') . '|', 'http', $url); 1112 1113 $is_local = isset($args['local']) && $args['local']; 1114 $ssl_verify = isset($args['sslverify']) && $args['sslverify']; 1115 if ( $is_local ) 1116 $ssl_verify = apply_filters('https_local_ssl_verify', $ssl_verify); 1117 elseif ( ! $is_local ) 1118 $ssl_verify = apply_filters('https_ssl_verify', $ssl_verify); 1119 1120 $options = array( 1121 'timeout' => $r['timeout'], 1122 'connecttimeout' => $r['timeout'], 1123 'redirect' => $r['redirection'], 1124 'useragent' => $r['user-agent'], 1125 'headers' => $r['headers'], 1126 'ssl' => array( 1127 'verifypeer' => $ssl_verify, 1128 'verifyhost' => $ssl_verify 1129 ) 1130 ); 1131 1132 // The HTTP extensions offers really easy proxy support. 1133 $proxy = new WP_HTTP_Proxy(); 1134 1135 if ( $proxy->is_enabled() && $proxy->send_through_proxy( $url ) ) { 1136 $options['proxyhost'] = $proxy->host(); 1137 $options['proxyport'] = $proxy->port(); 1138 $options['proxytype'] = HTTP_PROXY_HTTP; 1139 1140 if ( $proxy->use_authentication() ) { 1141 $options['proxyauth'] = $proxy->authentication(); 1142 $options['proxyauthtype'] = HTTP_AUTH_BASIC; 1143 } 1144 } 1145 1146 if ( !defined('WP_DEBUG') || ( defined('WP_DEBUG') && false === WP_DEBUG ) ) //Emits warning level notices for max redirects and timeouts 1147 $strResponse = @http_request($r['method'], $url, $r['body'], $options, $info); 1148 else 1149 $strResponse = http_request($r['method'], $url, $r['body'], $options, $info); //Emits warning level notices for max redirects and timeouts 1150 1151 // Error may still be set, Response may return headers or partial document, and error 1152 // contains a reason the request was aborted, eg, timeout expired or max-redirects reached. 1153 if ( false === $strResponse || ! empty($info['error']) ) 1154 return new WP_Error('http_request_failed', $info['response_code'] . ': ' . $info['error']); 1155 1156 if ( ! $r['blocking'] ) 1157 return array( 'headers' => array(), 'body' => '', 'response' => array('code' => false, 'message' => false), 'cookies' => array() ); 1158 1159 list($theHeaders, $theBody) = explode("\r\n\r\n", $strResponse, 2); 1160 $theHeaders = WP_Http::processHeaders($theHeaders); 1161 1162 if ( ! empty( $theBody ) && isset( $theHeaders['headers']['transfer-encoding'] ) && 'chunked' == $theHeaders['headers']['transfer-encoding'] ) { 1163 if ( !defined('WP_DEBUG') || ( defined('WP_DEBUG') && false === WP_DEBUG ) ) 1164 $theBody = @http_chunked_decode($theBody); 1165 else 1166 $theBody = http_chunked_decode($theBody); 1167 } 1168 1169 if ( true === $r['decompress'] && true === WP_Http_Encoding::should_decode($theHeaders['headers']) ) 1170 $theBody = http_inflate( $theBody ); 1171 1172 $theResponse = array(); 1173 $theResponse['code'] = $info['response_code']; 1174 $theResponse['message'] = get_status_header_desc($info['response_code']); 1175 1176 return array('headers' => $theHeaders['headers'], 'body' => $theBody, 'response' => $theResponse, 'cookies' => $theHeaders['cookies']); 1177 } 1178 1179 /** 1180 * Whether this class can be used for retrieving an URL. 1181 * 1182 * @static 1183 * @since 2.7.0 1184 * 1185 * @return boolean False means this class can not be used, true means it can. 1186 */ 1187 function test($args = array()) { 1188 return apply_filters('use_http_extension_transport', function_exists('http_request'), $args ); 1189 } 1190 } 1191 1192 /** 1193 * HTTP request method uses Curl extension to retrieve the url. 1194 * 1195 * Requires the Curl extension to be installed. 1196 * 1197 * @package WordPress 1198 * @subpackage HTTP 1199 * @since 2.7 1200 */ 1201 class WP_Http_Curl { 1202 1203 /** 1204 * Send a HTTP request to a URI using cURL extension. 1205 * 1206 * @access public 1207 * @since 2.7.0 1208 * 1209 * @param string $url 1210 * @param str|array $args Optional. Override the defaults. 1211 * @return array 'headers', 'body', 'cookies' and 'response' keys. 1212 */ 1213 function request($url, $args = array()) { 1214 $defaults = array( 1215 'method' => 'GET', 'timeout' => 5, 1216 'redirection' => 5, 'httpversion' => '1.0', 1217 'blocking' => true, 1218 'headers' => array(), 'body' => null, 'cookies' => array() 1219 ); 1220 1221 $r = wp_parse_args( $args, $defaults ); 1222 1223 if ( isset($r['headers']['User-Agent']) ) { 1224 $r['user-agent'] = $r['headers']['User-Agent']; 1225 unset($r['headers']['User-Agent']); 1226 } else if( isset($r['headers']['user-agent']) ) { 1227 $r['user-agent'] = $r['headers']['user-agent']; 1228 unset($r['headers']['user-agent']); 1229 } 1230 1231 // Construct Cookie: header if any cookies are set. 1232 WP_Http::buildCookieHeader( $r ); 1233 1234 // cURL extension will sometimes fail when the timeout is less than 1 as it may round down 1235 // to 0, which gives it unlimited timeout. 1236 if ( $r['timeout'] > 0 && $r['timeout'] < 1 ) 1237 $r['timeout'] = 1; 1238 1239 $handle = curl_init(); 1240 1241 // cURL offers really easy proxy support. 1242 $proxy = new WP_HTTP_Proxy(); 1243 1244 if ( $proxy->is_enabled() && $proxy->send_through_proxy( $url ) ) { 1245 1246 $isPHP5 = version_compare(PHP_VERSION, '5.0.0', '>='); 1247 1248 if ( $isPHP5 ) { 1249 curl_setopt( $handle, CURLOPT_PROXYTYPE, CURLPROXY_HTTP ); 1250 curl_setopt( $handle, CURLOPT_PROXY, $proxy->host() ); 1251 curl_setopt( $handle, CURLOPT_PROXYPORT, $proxy->port() ); 1252 } else { 1253 curl_setopt( $handle, CURLOPT_PROXY, $proxy->host() .':'. $proxy->port() ); 1254 } 1255 1256 if ( $proxy->use_authentication() ) { 1257 if ( $isPHP5 ) 1258 curl_setopt( $handle, CURLOPT_PROXYAUTH, CURLAUTH_BASIC ); 1259 1260 curl_setopt( $handle, CURLOPT_PROXYUSERPWD, $proxy->authentication() ); 1261 } 1262 } 1263 1264 $is_local = isset($args['local']) && $args['local']; 1265 $ssl_verify = isset($args['sslverify']) && $args['sslverify']; 1266 if ( $is_local ) 1267 $ssl_verify = apply_filters('https_local_ssl_verify', $ssl_verify); 1268 elseif ( ! $is_local ) 1269 $ssl_verify = apply_filters('https_ssl_verify', $ssl_verify); 1270 1271 curl_setopt( $handle, CURLOPT_URL, $url); 1272 curl_setopt( $handle, CURLOPT_RETURNTRANSFER, true ); 1273 curl_setopt( $handle, CURLOPT_SSL_VERIFYHOST, ( $ssl_verify === true ) ? 2 : false ); 1274 curl_setopt( $handle, CURLOPT_SSL_VERIFYPEER, $ssl_verify ); 1275 curl_setopt( $handle, CURLOPT_USERAGENT, $r['user-agent'] ); 1276 curl_setopt( $handle, CURLOPT_CONNECTTIMEOUT, $r['timeout'] ); 1277 curl_setopt( $handle, CURLOPT_TIMEOUT, $r['timeout'] ); 1278 curl_setopt( $handle, CURLOPT_MAXREDIRS, $r['redirection'] ); 1279 1280 switch ( $r['method'] ) { 1281 case 'HEAD': 1282 curl_setopt( $handle, CURLOPT_NOBODY, true ); 1283 break; 1284 case 'POST': 1285 curl_setopt( $handle, CURLOPT_POST, true ); 1286 curl_setopt( $handle, CURLOPT_POSTFIELDS, $r['body'] ); 1287 break; 1288 } 1289 1290 if ( true === $r['blocking'] ) 1291 curl_setopt( $handle, CURLOPT_HEADER, true ); 1292 else 1293 curl_setopt( $handle, CURLOPT_HEADER, false ); 1294 1295 // The option doesn't work with safe mode or when open_basedir is set. 1296 if ( !ini_get('safe_mode') && !ini_get('open_basedir') ) 1297 curl_setopt( $handle, CURLOPT_FOLLOWLOCATION, true ); 1298 1299 if ( !empty( $r['headers'] ) ) { 1300 // cURL expects full header strings in each element 1301 $headers = array(); 1302 foreach ( $r['headers'] as $name => $value ) { 1303 $headers[] = "{$name}: $value"; 1304 } 1305 curl_setopt( $handle, CURLOPT_HTTPHEADER, $headers ); 1306 } 1307 1308 if ( $r['httpversion'] == '1.0' ) 1309 curl_setopt( $handle, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_0 ); 1310 else 1311 curl_setopt( $handle, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_1 ); 1312 1313 // Cookies are not handled by the HTTP API currently. Allow for plugin authors to handle it 1314 // themselves... Although, it is somewhat pointless without some reference. 1315 do_action_ref_array( 'http_api_curl', array(&$handle) ); 1316 1317 // We don't need to return the body, so don't. Just execute request and return. 1318 if ( ! $r['blocking'] ) { 1319 curl_exec( $handle ); 1320 curl_close( $handle ); 1321 return array( 'headers' => array(), 'body' => '', 'response' => array('code' => false, 'message' => false), 'cookies' => array() ); 1322 } 1323 1324 $theResponse = curl_exec( $handle ); 1325 1326 if ( !empty($theResponse) ) { 1327 $parts = explode("\r\n\r\n", $theResponse); 1328 1329 $headerLength = curl_getinfo($handle, CURLINFO_HEADER_SIZE); 1330 $theHeaders = trim( substr($theResponse, 0, $headerLength) ); 1331 $theBody = substr( $theResponse, $headerLength ); 1332 if ( false !== strrpos($theHeaders, "\r\n\r\n") ) { 1333 $headerParts = explode("\r\n\r\n", $theHeaders); 1334 $theHeaders = $headerParts[ count($headerParts) -1 ]; 1335 } 1336 $theHeaders = WP_Http::processHeaders($theHeaders); 1337 } else { 1338 if ( $curl_error = curl_error($handle) ) 1339 return new WP_Error('http_request_failed', $curl_error); 1340 if ( in_array( curl_getinfo( $handle, CURLINFO_HTTP_CODE ), array(301, 302) ) ) 1341 return new WP_Error('http_request_failed', __('Too many redirects.')); 1342 1343 $theHeaders = array( 'headers' => array(), 'cookies' => array() ); 1344 $theBody = ''; 1345 } 1346 1347 $response = array(); 1348 $response['code'] = curl_getinfo( $handle, CURLINFO_HTTP_CODE ); 1349 $response['message'] = get_status_header_desc($response['code']); 1350 1351 curl_close( $handle ); 1352 1353 if ( true === $r['decompress'] && true === WP_Http_Encoding::should_decode($theHeaders['headers']) ) 1354 $theBody = WP_Http_Encoding::decompress( $theBody ); 1355 1356 return array('headers' => $theHeaders['headers'], 'body' => $theBody, 'response' => $response, 'cookies' => $theHeaders['cookies']); 1357 } 1358 1359 /** 1360 * Whether this class can be used for retrieving an URL. 1361 * 1362 * @static 1363 * @since 2.7.0 1364 * 1365 * @return boolean False means this class can not be used, true means it can. 1366 */ 1367 function test($args = array()) { 1368 if ( function_exists('curl_init') && function_exists('curl_exec') ) 1369 return apply_filters('use_curl_transport', true, $args); 1370 1371 return false; 1372 } 1373 } 1374 1375 /** 1376 * Adds Proxy support to the WordPress HTTP API. 1377 * 1378 * There are caveats to proxy support. It requires that defines be made in the wp-config.php file to 1379 * enable proxy support. There are also a few filters that plugins can hook into for some of the 1380 * constants. 1381 * 1382 * The constants are as follows: 1383 * <ol> 1384 * <li>WP_PROXY_HOST - Enable proxy support and host for connecting.</li> 1385 * <li>WP_PROXY_PORT - Proxy port for connection. No default, must be defined.</li> 1386 * <li>WP_PROXY_USERNAME - Proxy username, if it requires authentication.</li> 1387 * <li>WP_PROXY_PASSWORD - Proxy password, if it requires authentication.</li> 1388 * <li>WP_PROXY_BYPASS_HOSTS - Will prevent the hosts in this list from going through the proxy. 1389 * You do not need to have localhost and the blog host in this list, because they will not be passed 1390 * through the proxy. The list should be presented in a comma separated list</li> 1391 * </ol> 1392 * 1393 * An example can be as seen below. 1394 * <code> 1395 * define('WP_PROXY_HOST', '192.168.84.101'); 1396 * define('WP_PROXY_PORT', '8080'); 1397 * define('WP_PROXY_BYPASS_HOSTS', 'localhost, www.example.com'); 1398 * </code> 1399 * 1400 * @link http://core.trac.wordpress.org/ticket/4011 Proxy support ticket in WordPress. 1401 * @since 2.8 1402 */ 1403 class WP_HTTP_Proxy { 1404 1405 /** 1406 * Whether proxy connection should be used. 1407 * 1408 * @since 2.8 1409 * @use WP_PROXY_HOST 1410 * @use WP_PROXY_PORT 1411 * 1412 * @return bool 1413 */ 1414 function is_enabled() { 1415 return defined('WP_PROXY_HOST') && defined('WP_PROXY_PORT'); 1416 } 1417 1418 /** 1419 * Whether authentication should be used. 1420 * 1421 * @since 2.8 1422 * @use WP_PROXY_USERNAME 1423 * @use WP_PROXY_PASSWORD 1424 * 1425 * @return bool 1426 */ 1427 function use_authentication() { 1428 return defined('WP_PROXY_USERNAME') && defined('WP_PROXY_PASSWORD'); 1429 } 1430 1431 /** 1432 * Retrieve the host for the proxy server. 1433 * 1434 * @since 2.8 1435 * 1436 * @return string 1437 */ 1438 function host() { 1439 if ( defined('WP_PROXY_HOST') ) 1440 return WP_PROXY_HOST; 1441 1442 return ''; 1443 } 1444 1445 /** 1446 * Retrieve the port for the proxy server. 1447 * 1448 * @since 2.8 1449 * 1450 * @return string 1451 */ 1452 function port() { 1453 if ( defined('WP_PROXY_PORT') ) 1454 return WP_PROXY_PORT; 1455 1456 return ''; 1457 } 1458 1459 /** 1460 * Retrieve the username for proxy authentication. 1461 * 1462 * @since 2.8 1463 * 1464 * @return string 1465 */ 1466 function username() { 1467 if ( defined('WP_PROXY_USERNAME') ) 1468 return WP_PROXY_USERNAME; 1469 1470 return ''; 1471 } 1472 1473 /** 1474 * Retrieve the password for proxy authentication. 1475 * 1476 * @since 2.8 1477 * 1478 * @return string 1479 */ 1480 function password() { 1481 if ( defined('WP_PROXY_PASSWORD') ) 1482 return WP_PROXY_PASSWORD; 1483 1484 return ''; 1485 } 1486 1487 /** 1488 * Retrieve authentication string for proxy authentication. 1489 * 1490 * @since 2.8 1491 * 1492 * @return string 1493 */ 1494 function authentication() { 1495 return $this->username() . ':' . $this->password(); 1496 } 1497 1498 /** 1499 * Retrieve header string for proxy authentication. 1500 * 1501 * @since 2.8 1502 * 1503 * @return string 1504 */ 1505 function authentication_header() { 1506 return 'Proxy-Authentication: Basic ' . base64_encode( $this->authentication() ); 1507 } 1508 1509 /** 1510 * Whether URL should be sent through the proxy server. 1511 * 1512 * We want to keep localhost and the blog URL from being sent through the proxy server, because 1513 * some proxies can not handle this. We also have the constant available for defining other 1514 * hosts that won't be sent through the proxy. 1515 * 1516 * @uses WP_PROXY_BYPASS_HOSTS 1517 * @since unknown 1518 * 1519 * @param string $uri URI to check. 1520 * @return bool True, to send through the proxy and false if, the proxy should not be used. 1521 */ 1522 function send_through_proxy( $uri ) { 1523 // parse_url() only handles http, https type URLs, and will emit E_WARNING on failure. 1524 // This will be displayed on blogs, which is not reasonable. 1525 $check = @parse_url($uri); 1526 1527 // Malformed URL, can not process, but this could mean ssl, so let through anyway. 1528 if ( $check === false ) 1529 return true; 1530 1531 $home = parse_url( backpress_get_option( 'application_uri' ) ); 1532 1533 if ( $check['host'] == 'localhost' || $check['host'] == $home['host'] ) 1534 return false; 1535 1536 if ( !defined('WP_PROXY_BYPASS_HOSTS') ) 1537 return true; 1538 1539 static $bypass_hosts; 1540 if ( null == $bypass_hosts ) 1541 $bypass_hosts = preg_split('|,\s*|', WP_PROXY_BYPASS_HOSTS); 1542 1543 return !in_array( $check['host'], $bypass_hosts ); 1544 } 1545 } 1546 /** 1547 * Internal representation of a single cookie. 1548 * 1549 * Returned cookies are represented using this class, and when cookies are set, if they are not 1550 * already a WP_Http_Cookie() object, then they are turned into one. 1551 * 1552 * @todo The WordPress convention is to use underscores instead of camelCase for function and method 1553 * names. Need to switch to use underscores instead for the methods. 1554 * 1555 * @package WordPress 1556 * @subpackage HTTP 1557 * @since 2.8.0 1558 * @author Beau Lebens 1559 */ 1560 class WP_Http_Cookie { 1561 1562 /** 1563 * Cookie name. 1564 * 1565 * @since 2.8.0 1566 * @var string 1567 */ 1568 var $name; 1569 1570 /** 1571 * Cookie value. 1572 * 1573 * @since 2.8.0 1574 * @var string 1575 */ 1576 var $value; 1577 1578 /** 1579 * When the cookie expires. 1580 * 1581 * @since 2.8.0 1582 * @var string 1583 */ 1584 var $expires; 1585 1586 /** 1587 * Cookie URL path. 1588 * 1589 * @since 2.8.0 1590 * @var string 1591 */ 1592 var $path; 1593 1594 /** 1595 * Cookie Domain. 1596 * 1597 * @since 2.8.0 1598 * @var string 1599 */ 1600 var $domain; 1601 1602 /** 1603 * PHP4 style Constructor - Calls PHP5 Style Constructor. 1604 * 1605 * @access public 1606 * @since 2.8.0 1607 * @param string|array $data Raw cookie data. 1608 */ 1609 function WP_Http_Cookie( $data ) { 1610 self::__construct( $data ); 1611 } 1612 1613 /** 1614 * Sets up this cookie object. 1615 * 1616 * The parameter $data should be either an associative array containing the indices names below 1617 * or a header string detailing it. 1618 * 1619 * If it's an array, it should include the following elements: 1620 * <ol> 1621 * <li>Name</li> 1622 * <li>Value - should NOT be urlencoded already.</li> 1623 * <li>Expires - (optional) String or int (UNIX timestamp).</li> 1624 * <li>Path (optional)</li> 1625 * <li>Domain (optional)</li> 1626 * </ol> 1627 * 1628 * @access public 1629 * @since 2.8.0 1630 * 1631 * @param string|array $data Raw cookie data. 1632 */ 1633 function __construct( $data ) { 1634 if ( is_string( $data ) ) { 1635 // Assume it's a header string direct from a previous request 1636 $pairs = explode( ';', $data ); 1637 1638 // Special handling for first pair; name=value. Also be careful of "=" in value 1639 $name = trim( substr( $pairs[0], 0, strpos( $pairs[0], '=' ) ) ); 1640 $value = substr( $pairs[0], strpos( $pairs[0], '=' ) + 1 ); 1641 $this->name = $name; 1642 $this->value = urldecode( $value ); 1643 array_shift( $pairs ); //Removes name=value from items. 1644 1645 // Set everything else as a property 1646 foreach ( $pairs as $pair ) { 1647 if ( empty($pair) ) //Handles the cookie ending in ; which results in a empty final pair 1648 continue; 1649 1650 list( $key, $val ) = explode( '=', $pair ); 1651 $key = strtolower( trim( $key ) ); 1652 if ( 'expires' == $key ) 1653 $val = strtotime( $val ); 1654 $this->$key = $val; 1655 } 1656 } else { 1657 if ( !isset( $data['name'] ) ) 1658 return false; 1659 1660 // Set properties based directly on parameters 1661 $this->name = $data['name']; 1662 $this->value = isset( $data['value'] ) ? $data['value'] : ''; 1663 $this->path = isset( $data['path'] ) ? $data['path'] : ''; 1664 $this->domain = isset( $data['domain'] ) ? $data['domain'] : ''; 1665 1666 if ( isset( $data['expires'] ) ) 1667 $this->expires = is_int( $data['expires'] ) ? $data['expires'] : strtotime( $data['expires'] ); 1668 else 1669 $this->expires = null; 1670 } 1671 } 1672 1673 /** 1674 * Confirms that it's OK to send this cookie to the URL checked against. 1675 * 1676 * Decision is based on RFC 2109/2965, so look there for details on validity. 1677 * 1678 * @access public 1679 * @since 2.8.0 1680 * 1681 * @param string $url URL you intend to send this cookie to 1682 * @return boolean TRUE if allowed, FALSE otherwise. 1683 */ 1684 function test( $url ) { 1685 // Expires - if expired then nothing else matters 1686 if ( time() > $this->expires ) 1687 return false; 1688 1689 // Get details on the URL we're thinking about sending to 1690 $url = parse_url( $url ); 1691 $url['port'] = isset( $url['port'] ) ? $url['port'] : 80; 1692 $url['path'] = isset( $url['path'] ) ? $url['path'] : '/'; 1693 1694 // Values to use for comparison against the URL 1695 $path = isset( $this->path ) ? $this->path : '/'; 1696 $port = isset( $this->port ) ? $this->port : 80; 1697 $domain = isset( $this->domain ) ? strtolower( $this->domain ) : strtolower( $url['host'] ); 1698 if ( false === stripos( $domain, '.' ) ) 1699 $domain .= '.local'; 1700 1701 // Host - very basic check that the request URL ends with the domain restriction (minus leading dot) 1702 $domain = substr( $domain, 0, 1 ) == '.' ? substr( $domain, 1 ) : $domain; 1703 if ( substr( $url['host'], -strlen( $domain ) ) != $domain ) 1704 return false; 1705 1706 // Port - supports "port-lists" in the format: "80,8000,8080" 1707 if ( !in_array( $url['port'], explode( ',', $port) ) ) 1708 return false; 1709 1710 // Path - request path must start with path restriction 1711 if ( substr( $url['path'], 0, strlen( $path ) ) != $path ) 1712 return false; 1713 1714 return true; 1715 } 1716 1717 /** 1718 * Convert cookie name and value back to header string. 1719 * 1720 * @access public 1721 * @since 2.8.0 1722 * 1723 * @return string Header encoded cookie name and value. 1724 */ 1725 function getHeaderValue() { 1726 if ( empty( $this->name ) || empty( $this->value ) ) 1727 return ''; 1728 1729 return $this->name . '=' . urlencode( $this->value ); 1730 } 1731 1732 /** 1733 * Retrieve cookie header for usage in the rest of the WordPress HTTP API. 1734 * 1735 * @access public 1736 * @since 2.8.0 1737 * 1738 * @return string 1739 */ 1740 function getFullHeader() { 1741 return 'Cookie: ' . $this->getHeaderValue(); 1742 } 1743 } 1744 1745 /** 1746 * Implementation for deflate and gzip transfer encodings. 1747 * 1748 * Includes RFC 1950, RFC 1951, and RFC 1952. 1749 * 1750 * @since 2.8 1751 * @package WordPress 1752 * @subpackage HTTP 1753 */ 1754 class WP_Http_Encoding { 1755 1756 /** 1757 * Compress raw string using the deflate format. 1758 * 1759 * Supports the RFC 1951 standard. 1760 * 1761 * @since 2.8 1762 * 1763 * @param string $raw String to compress. 1764 * @param int $level Optional, default is 9. Compression level, 9 is highest. 1765 * @param string $supports Optional, not used. When implemented it will choose the right compression based on what the server supports. 1766 * @return string|bool False on failure. 1767 */ 1768 function compress( $raw, $level = 9, $supports = null ) { 1769 return gzdeflate( $raw, $level ); 1770 } 1771 1772 /** 1773 * Decompression of deflated string. 1774 * 1775 * Will attempt to decompress using the RFC 1950 standard, and if that fails 1776 * then the RFC 1951 standard deflate will be attempted. Finally, the RFC 1777 * 1952 standard gzip decode will be attempted. If all fail, then the 1778 * original compressed string will be returned. 1779 * 1780 * @since 2.8 1781 * 1782 * @param string $compressed String to decompress. 1783 * @param int $length The optional length of the compressed data. 1784 * @return string|bool False on failure. 1785 */ 1786 function decompress( $compressed, $length = null ) { 1787 $decompressed = gzinflate( $compressed ); 1788 1789 if ( false !== $decompressed ) 1790 return $decompressed; 1791 1792 $decompressed = gzuncompress( $compressed ); 1793 1794 if ( false !== $decompressed ) 1795 return $decompressed; 1796 1797 if ( function_exists('gzdecode') ) { 1798 $decompressed = gzdecode( $compressed ); 1799 1800 if ( false !== $decompressed ) 1801 return $decompressed; 1802 } 1803 1804 return $compressed; 1805 } 1806 1807 /** 1808 * What encoding types to accept and their priority values. 1809 * 1810 * @since 2.8 1811 * 1812 * @return string Types of encoding to accept. 1813 */ 1814 function accept_encoding() { 1815 $type = array(); 1816 if ( function_exists( 'gzinflate' ) ) 1817 $type[] = 'deflate;q=1.0'; 1818 1819 if ( function_exists( 'gzuncompress' ) ) 1820 $type[] = 'compress;q=0.5'; 1821 1822 if ( function_exists( 'gzdecode' ) ) 1823 $type[] = 'gzip;q=0.5'; 1824 1825 return implode(', ', $type); 1826 } 1827 1828 /** 1829 * What enconding the content used when it was compressed to send in the headers. 1830 * 1831 * @since 2.8 1832 * 1833 * @return string Content-Encoding string to send in the header. 1834 */ 1835 function content_encoding() { 1836 return 'deflate'; 1837 } 1838 1839 /** 1840 * Whether the content be decoded based on the headers. 1841 * 1842 * @since 2.8 1843 * 1844 * @param array|string $headers All of the available headers. 1845 * @return bool 1846 */ 1847 function should_decode($headers) { 1848 if ( is_array( $headers ) ) { 1849 if ( array_key_exists('content-encoding', $headers) && ! empty( $headers['content-encoding'] ) ) 1850 return true; 1851 } else if( is_string( $headers ) ) { 1852 return ( stripos($headers, 'content-encoding:') !== false ); 1853 } 1854 1855 return false; 1856 } 1857 1858 /** 1859 * Whether decompression and compression are supported by the PHP version. 1860 * 1861 * Each function is tested instead of checking for the zlib extension, to 1862 * ensure that the functions all exist in the PHP version and aren't 1863 * disabled. 1864 * 1865 * @since 2.8 1866 * 1867 * @return bool 1868 */ 1869 function is_available() { 1870 return ( function_exists('gzuncompress') || function_exists('gzdeflate') || function_exists('gzinflate') ); 1871 } 1872 } 1873 1874 /** 1875 * Returns the initialized WP_Http Object 1876 * 1877 * @since 2.7.0 1878 * @access private 1879 * 1880 * @return WP_Http HTTP Transport object. 1881 */ 1882 function &_wp_http_get_object() { 1883 static $http; 1884 1885 if ( is_null($http) ) 1886 $http = new WP_Http(); 1887 1888 return $http; 1889 } 1890 1891 /** 1892 * Retrieve the raw response from the HTTP request. 1893 * 1894 * The array structure is a little complex. 1895 * 1896 * <code> 1897 * $res = array( 'headers' => array(), 'response' => array('code' => int, 'message' => string) ); 1898 * </code> 1899 * 1900 * All of the headers in $res['headers'] are with the name as the key and the 1901 * value as the value. So to get the User-Agent, you would do the following. 1902 * 1903 * <code> 1904 * $user_agent = $res['headers']['user-agent']; 1905 * </code> 1906 * 1907 * The body is the raw response content and can be retrieved from $res['body']. 1908 * 1909 * This function is called first to make the request and there are other API 1910 * functions to abstract out the above convoluted setup. 1911 * 1912 * @since 2.7.0 1913 * 1914 * @param string $url Site URL to retrieve. 1915 * @param array $args Optional. Override the defaults. 1916 * @return WP_Error|array The response or WP_Error on failure. 1917 */ 1918 function wp_remote_request($url, $args = array()) { 1919 $objFetchSite = _wp_http_get_object(); 1920 return $objFetchSite->request($url, $args); 1921 } 1922 1923 /** 1924 * Retrieve the raw response from the HTTP request using the GET method. 1925 * 1926 * @see wp_remote_request() For more information on the response array format. 1927 * 1928 * @since 2.7.0 1929 * 1930 * @param string $url Site URL to retrieve. 1931 * @param array $args Optional. Override the defaults. 1932 * @return WP_Error|array The response or WP_Error on failure. 1933 */ 1934 function wp_remote_get($url, $args = array()) { 1935 $objFetchSite = _wp_http_get_object(); 1936 return $objFetchSite->get($url, $args); 1937 } 1938 1939 /** 1940 * Retrieve the raw response from the HTTP request using the POST method. 1941 * 1942 * @see wp_remote_request() For more information on the response array format. 1943 * 1944 * @since 2.7.0 1945 * 1946 * @param string $url Site URL to retrieve. 1947 * @param array $args Optional. Override the defaults. 1948 * @return WP_Error|array The response or WP_Error on failure. 1949 */ 1950 function wp_remote_post($url, $args = array()) { 1951 $objFetchSite = _wp_http_get_object(); 1952 return $objFetchSite->post($url, $args); 1953 } 1954 1955 /** 1956 * Retrieve the raw response from the HTTP request using the HEAD method. 1957 * 1958 * @see wp_remote_request() For more information on the response array format. 1959 * 1960 * @since 2.7.0 1961 * 1962 * @param string $url Site URL to retrieve. 1963 * @param array $args Optional. Override the defaults. 1964 * @return WP_Error|array The response or WP_Error on failure. 1965 */ 1966 function wp_remote_head($url, $args = array()) { 1967 $objFetchSite = _wp_http_get_object(); 1968 return $objFetchSite->head($url, $args); 1969 } 1970 1971 /** 1972 * Retrieve only the headers from the raw response. 1973 * 1974 * @since 2.7.0 1975 * 1976 * @param array $response HTTP response. 1977 * @return array The headers of the response. Empty array if incorrect parameter given. 1978 */ 1979 function wp_remote_retrieve_headers(&$response) { 1980 if ( is_wp_error($response) || ! isset($response['headers']) || ! is_array($response['headers'])) 1981 return array(); 1982 1983 return $response['headers']; 1984 } 1985 1986 /** 1987 * Retrieve a single header by name from the raw response. 1988 * 1989 * @since 2.7.0 1990 * 1991 * @param array $response 1992 * @param string $header Header name to retrieve value from. 1993 * @return string The header value. Empty string on if incorrect parameter given, or if the header doesnt exist. 1994 */ 1995 function wp_remote_retrieve_header(&$response, $header) { 1996 if ( is_wp_error($response) || ! isset($response['headers']) || ! is_array($response['headers'])) 1997 return ''; 1998 1999 if ( array_key_exists($header, $response['headers']) ) 2000 return $response['headers'][$header]; 2001 2002 return ''; 2003 } 2004 2005 /** 2006 * Retrieve only the response code from the raw response. 2007 * 2008 * Will return an empty array if incorrect parameter value is given. 2009 * 2010 * @since 2.7.0 2011 * 2012 * @param array $response HTTP response. 2013 * @return string the response code. Empty string on incorrect parameter given. 2014 */ 2015 function wp_remote_retrieve_response_code(&$response) { 2016 if ( is_wp_error($response) || ! isset($response['response']) || ! is_array($response['response'])) 2017 return ''; 2018 2019 return $response['response']['code']; 2020 } 2021 2022 /** 2023 * Retrieve only the response message from the raw response. 2024 * 2025 * Will return an empty array if incorrect parameter value is given. 2026 * 2027 * @since 2.7.0 2028 * 2029 * @param array $response HTTP response. 2030 * @return string The response message. Empty string on incorrect parameter given. 2031 */ 2032 function wp_remote_retrieve_response_message(&$response) { 2033 if ( is_wp_error($response) || ! isset($response['response']) || ! is_array($response['response'])) 2034 return ''; 2035 2036 return $response['response']['message']; 2037 } 2038 2039 /** 2040 * Retrieve only the body from the raw response. 2041 * 2042 * @since 2.7.0 2043 * 2044 * @param array $response HTTP response. 2045 * @return string The body of the response. Empty string if no body or incorrect parameter given. 2046 */ 2047 function wp_remote_retrieve_body(&$response) { 2048 if ( is_wp_error($response) || ! isset($response['body']) ) 2049 return ''; 2050 2051 return $response['body']; 2052 }
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