1<?php 2 3namespace dokuwiki\HTTP; 4 5define('HTTP_NL', "\r\n"); 6 7 8/** 9 * This class implements a basic HTTP client 10 * 11 * It supports POST and GET, Proxy usage, basic authentication, 12 * handles cookies and referrers. It is based upon the httpclient 13 * function from the VideoDB project. 14 * 15 * @link https://www.splitbrain.org/projects/videodb 16 * @author Andreas Goetz <cpuidle@gmx.de> 17 * @author Andreas Gohr <andi@splitbrain.org> 18 * @author Tobias Sarnowski <sarnowski@new-thoughts.org> 19 */ 20class HTTPClient 21{ 22 //set these if you like 23 public $agent; // User agent 24 public $http = '1.0'; // HTTP version defaults to 1.0 25 public $timeout = 15; // read timeout (seconds) 26 public $cookies = []; 27 public $referer = ''; 28 public $max_redirect = 3; 29 public $max_bodysize = 0; 30 public $max_bodysize_abort = true; // if set, abort if the response body is bigger than max_bodysize 31 public $header_regexp = ''; // if set this RE must match against the headers, else abort 32 public $headers = []; 33 public $debug = false; 34 public $start = 0.0; // for timings 35 public $keep_alive = true; // keep alive rocks 36 37 // don't set these, read on error 38 public $error; 39 public $redirect_count = 0; 40 41 // read these after a successful request 42 public $status = 0; 43 public $resp_body; 44 public $resp_headers; 45 46 // set these to do basic authentication 47 public $user; 48 public $pass; 49 50 // set these if you need to use a proxy 51 public $proxy_host; 52 public $proxy_port; 53 public $proxy_user; 54 public $proxy_pass; 55 public $proxy_ssl; //boolean set to true if your proxy needs SSL 56 public $proxy_except; // regexp of URLs to exclude from proxy 57 58 // list of kept alive connections 59 protected static $connections = []; 60 61 // what we use as boundary on multipart/form-data posts 62 protected $boundary = '---DokuWikiHTTPClient--4523452351'; 63 64 /** 65 * Constructor. 66 * 67 * @author Andreas Gohr <andi@splitbrain.org> 68 */ 69 public function __construct() 70 { 71 $this->agent = 'Mozilla/4.0 (compatible; DokuWiki HTTP Client; ' . PHP_OS . ')'; 72 if (extension_loaded('zlib')) $this->headers['Accept-encoding'] = 'gzip'; 73 $this->headers['Accept'] = 'text/xml,application/xml,application/xhtml+xml,' . 74 'text/html,text/plain,image/png,image/jpeg,image/gif,*/*'; 75 $this->headers['Accept-Language'] = 'en-us'; 76 } 77 78 79 /** 80 * Simple function to do a GET request 81 * 82 * Returns the wanted page or false on an error; 83 * 84 * @param string $url The URL to fetch 85 * @param bool $sloppy304 Return body on 304 not modified 86 * @return false|string response body, false on error 87 * 88 * @author Andreas Gohr <andi@splitbrain.org> 89 */ 90 public function get($url, $sloppy304 = false) 91 { 92 if (!$this->sendRequest($url)) return false; 93 if ($this->status == 304 && $sloppy304) return $this->resp_body; 94 if ($this->status < 200 || $this->status > 206) return false; 95 return $this->resp_body; 96 } 97 98 /** 99 * Simple function to do a GET request with given parameters 100 * 101 * Returns the wanted page or false on an error. 102 * 103 * This is a convenience wrapper around get(). The given parameters 104 * will be correctly encoded and added to the given base URL. 105 * 106 * @param string $url The URL to fetch 107 * @param array $data Associative array of parameters 108 * @param bool $sloppy304 Return body on 304 not modified 109 * @return false|string response body, false on error 110 * 111 * @author Andreas Gohr <andi@splitbrain.org> 112 */ 113 public function dget($url, $data, $sloppy304 = false) 114 { 115 if (strpos($url, '?')) { 116 $url .= '&'; 117 } else { 118 $url .= '?'; 119 } 120 $url .= $this->postEncode($data); 121 return $this->get($url, $sloppy304); 122 } 123 124 /** 125 * Simple function to do a POST request 126 * 127 * Returns the resulting page or false on an error; 128 * 129 * @param string $url The URL to fetch 130 * @param array $data Associative array of parameters 131 * @return false|string response body, false on error 132 * @author Andreas Gohr <andi@splitbrain.org> 133 */ 134 public function post($url, $data) 135 { 136 if (!$this->sendRequest($url, $data, 'POST')) return false; 137 if ($this->status < 200 || $this->status > 206) return false; 138 return $this->resp_body; 139 } 140 141 /** 142 * Send an HTTP request 143 * 144 * This method handles the whole HTTP communication. It respects set proxy settings, 145 * builds the request headers, follows redirects and parses the response. 146 * 147 * Post data should be passed as associative array. When passed as string it will be 148 * sent as is. You will need to setup your own Content-Type header then. 149 * 150 * @param string $url - the complete URL 151 * @param mixed $data - the post data either as array or raw data 152 * @param string $method - HTTP Method usually GET or POST. 153 * @return bool - true on success 154 * 155 * @author Andreas Goetz <cpuidle@gmx.de> 156 * @author Andreas Gohr <andi@splitbrain.org> 157 */ 158 public function sendRequest($url, $data = '', $method = 'GET') 159 { 160 $this->start = microtime(true); 161 $this->error = ''; 162 $this->status = 0; 163 $this->resp_body = ''; 164 $this->resp_headers = []; 165 166 // save unencoded data for recursive call 167 $unencodedData = $data; 168 169 // don't accept gzip if truncated bodies might occur 170 if ( 171 $this->max_bodysize && 172 !$this->max_bodysize_abort && 173 isset($this->headers['Accept-encoding']) && 174 $this->headers['Accept-encoding'] == 'gzip' 175 ) { 176 unset($this->headers['Accept-encoding']); 177 } 178 179 // parse URL into bits 180 $uri = parse_url($url); 181 $server = $uri['host']; 182 $path = empty($uri['path']) ? '/' : $uri['path']; 183 $uriPort = empty($uri['port']) ? null : $uri['port']; 184 if (!empty($uri['query'])) $path .= '?' . $uri['query']; 185 if (isset($uri['user'])) $this->user = $uri['user']; 186 if (isset($uri['pass'])) $this->pass = $uri['pass']; 187 188 // proxy setup 189 if ($this->useProxyForUrl($url)) { 190 $request_url = $url; 191 $server = $this->proxy_host; 192 $port = $this->proxy_port; 193 if (empty($port)) $port = 8080; 194 $use_tls = $this->proxy_ssl; 195 } else { 196 $request_url = $path; 197 $port = $uriPort ?: ($uri['scheme'] == 'https' ? 443 : 80); 198 $use_tls = ($uri['scheme'] == 'https'); 199 } 200 201 // add SSL stream prefix if needed - needs SSL support in PHP 202 if ($use_tls) { 203 if (!in_array('ssl', stream_get_transports())) { 204 $this->status = -200; 205 $this->error = 'This PHP version does not support SSL - cannot connect to server'; 206 } 207 $server = 'ssl://' . $server; 208 } 209 210 // prepare headers 211 $headers = $this->headers; 212 $headers['Host'] = $uri['host'] 213 . ($uriPort ? ':' . $uriPort : ''); 214 $headers['User-Agent'] = $this->agent; 215 $headers['Referer'] = $this->referer; 216 217 if ($method == 'POST') { 218 if (is_array($data)) { 219 if (empty($headers['Content-Type'])) { 220 $headers['Content-Type'] = null; 221 } 222 if ($headers['Content-Type'] == 'multipart/form-data') { 223 $headers['Content-Type'] = 'multipart/form-data; boundary=' . $this->boundary; 224 $data = $this->postMultipartEncode($data); 225 } else { 226 $headers['Content-Type'] = 'application/x-www-form-urlencoded'; 227 $data = $this->postEncode($data); 228 } 229 } 230 } elseif ($method == 'GET') { 231 $data = ''; //no data allowed on GET requests 232 } 233 234 $contentlength = strlen($data); 235 if ($contentlength) { 236 $headers['Content-Length'] = $contentlength; 237 } 238 239 if ($this->user) { 240 $headers['Authorization'] = 'Basic ' . base64_encode($this->user . ':' . $this->pass); 241 } 242 if ($this->proxy_user) { 243 $headers['Proxy-Authorization'] = 'Basic ' . base64_encode($this->proxy_user . ':' . $this->proxy_pass); 244 } 245 246 // already connected? 247 $connectionId = $this->uniqueConnectionId($server, $port); 248 $this->debug('connection pool', self::$connections); 249 $socket = null; 250 if (isset(self::$connections[$connectionId])) { 251 $this->debug('reusing connection', $connectionId); 252 $socket = self::$connections[$connectionId]; 253 } 254 if (is_null($socket) || feof($socket)) { 255 $this->debug('opening connection', $connectionId); 256 // open socket 257 $socket = @fsockopen($server, $port, $errno, $errstr, $this->timeout); 258 if (!$socket) { 259 $this->status = -100; 260 $this->error = "Could not connect to $server:$port\n$errstr ($errno)"; 261 return false; 262 } 263 264 // try to establish a CONNECT tunnel for SSL 265 try { 266 if ($this->ssltunnel($socket, $request_url)) { 267 // no keep alive for tunnels 268 $this->keep_alive = false; 269 // tunnel is authed already 270 if (isset($headers['Proxy-Authentication'])) unset($headers['Proxy-Authentication']); 271 } 272 } catch (HTTPClientException $e) { 273 $this->status = $e->getCode(); 274 $this->error = $e->getMessage(); 275 fclose($socket); 276 return false; 277 } 278 279 // keep alive? 280 if ($this->keep_alive) { 281 self::$connections[$connectionId] = $socket; 282 } else { 283 unset(self::$connections[$connectionId]); 284 } 285 } 286 287 if ($this->keep_alive && !$this->useProxyForUrl($request_url)) { 288 // RFC 2068, section 19.7.1: A client MUST NOT send the Keep-Alive 289 // connection token to a proxy server. We still do keep the connection the 290 // proxy alive (well except for CONNECT tunnels) 291 $headers['Connection'] = 'Keep-Alive'; 292 } else { 293 $headers['Connection'] = 'Close'; 294 } 295 296 try { 297 //set non-blocking 298 stream_set_blocking($socket, 0); 299 300 // build request 301 $request = "$method $request_url HTTP/" . $this->http . HTTP_NL; 302 $request .= $this->buildHeaders($headers); 303 $request .= $this->getCookies(); 304 $request .= HTTP_NL; 305 $request .= $data; 306 307 $this->debug('request', $request); 308 $this->sendData($socket, $request, 'request'); 309 310 // read headers from socket 311 $r_headers = ''; 312 do { 313 $r_line = $this->readLine($socket, 'headers'); 314 $r_headers .= $r_line; 315 } while ($r_line != "\r\n" && $r_line != "\n"); 316 317 $this->debug('response headers', $r_headers); 318 319 // check if expected body size exceeds allowance 320 if ($this->max_bodysize && preg_match('/\r?\nContent-Length:\s*(\d+)\r?\n/i', $r_headers, $match)) { 321 if ($match[1] > $this->max_bodysize) { 322 if ($this->max_bodysize_abort) 323 throw new HTTPClientException('Reported content length exceeds allowed response size'); 324 else $this->error = 'Reported content length exceeds allowed response size'; 325 } 326 } 327 328 // get Status 329 if (!preg_match('/^HTTP\/(\d\.\d)\s*(\d+).*?\n/s', $r_headers, $m)) 330 throw new HTTPClientException('Server returned bad answer ' . $r_headers); 331 332 $this->status = $m[2]; 333 334 // handle headers and cookies 335 $this->resp_headers = $this->parseHeaders($r_headers); 336 if (isset($this->resp_headers['set-cookie'])) { 337 foreach ((array)$this->resp_headers['set-cookie'] as $cookie) { 338 [$cookie] = sexplode(';', $cookie, 2, ''); 339 [$key, $val] = sexplode('=', $cookie, 2, ''); 340 $key = trim($key); 341 if ($val == 'deleted') { 342 if (isset($this->cookies[$key])) { 343 unset($this->cookies[$key]); 344 } 345 } elseif ($key) { 346 $this->cookies[$key] = $val; 347 } 348 } 349 } 350 351 $this->debug('Object headers', $this->resp_headers); 352 353 // check server status code to follow redirect 354 if (in_array($this->status, [301, 302, 303, 307, 308])) { 355 if (empty($this->resp_headers['location'])) { 356 throw new HTTPClientException('Redirect but no Location Header found'); 357 } elseif ($this->redirect_count == $this->max_redirect) { 358 throw new HTTPClientException('Maximum number of redirects exceeded'); 359 } else { 360 // close the connection because we don't handle content retrieval here 361 // that's the easiest way to clean up the connection 362 fclose($socket); 363 unset(self::$connections[$connectionId]); 364 365 $this->redirect_count++; 366 $this->referer = $url; 367 // handle non-RFC-compliant relative redirects 368 if (!preg_match('/^http/i', $this->resp_headers['location'])) { 369 if ($this->resp_headers['location'][0] != '/') { 370 $this->resp_headers['location'] = $uri['scheme'] . '://' . $uri['host'] . ':' . $uriPort . 371 dirname($path) . '/' . $this->resp_headers['location']; 372 } else { 373 $this->resp_headers['location'] = $uri['scheme'] . '://' . $uri['host'] . ':' . $uriPort . 374 $this->resp_headers['location']; 375 } 376 } 377 if ($this->status == 307 || $this->status == 308) { 378 // perform redirected request, same method as before (required by RFC) 379 return $this->sendRequest($this->resp_headers['location'], $unencodedData, $method); 380 } else { 381 // perform redirected request, always via GET (required by RFC) 382 return $this->sendRequest($this->resp_headers['location'], [], 'GET'); 383 } 384 } 385 } 386 387 // check if headers are as expected 388 if ($this->header_regexp && !preg_match($this->header_regexp, $r_headers)) 389 throw new HTTPClientException('The received headers did not match the given regexp'); 390 391 //read body (with chunked encoding if needed) 392 $r_body = ''; 393 if ( 394 ( 395 isset($this->resp_headers['transfer-encoding']) && 396 $this->resp_headers['transfer-encoding'] == 'chunked' 397 ) || ( 398 isset($this->resp_headers['transfer-coding']) && 399 $this->resp_headers['transfer-coding'] == 'chunked' 400 ) 401 ) { 402 $abort = false; 403 do { 404 $chunk_size = ''; 405 while (preg_match('/^[a-zA-Z0-9]?$/', $byte = $this->readData($socket, 1, 'chunk'))) { 406 // read chunksize until \r 407 $chunk_size .= $byte; 408 if (strlen($chunk_size) > 128) // set an abritrary limit on the size of chunks 409 throw new HTTPClientException('Allowed response size exceeded'); 410 } 411 $this->readLine($socket, 'chunk'); // readtrailing \n 412 $chunk_size = hexdec($chunk_size); 413 414 if ($this->max_bodysize && $chunk_size + strlen($r_body) > $this->max_bodysize) { 415 if ($this->max_bodysize_abort) 416 throw new HTTPClientException('Allowed response size exceeded'); 417 $this->error = 'Allowed response size exceeded'; 418 $chunk_size = $this->max_bodysize - strlen($r_body); 419 $abort = true; 420 } 421 422 if ($chunk_size > 0) { 423 $r_body .= $this->readData($socket, $chunk_size, 'chunk'); 424 $this->readData($socket, 2, 'chunk'); // read trailing \r\n 425 } 426 } while ($chunk_size && !$abort); 427 } elseif ( 428 isset($this->resp_headers['content-length']) && 429 !isset($this->resp_headers['transfer-encoding']) 430 ) { 431 /* RFC 2616 432 * If a message is received with both a Transfer-Encoding header field and a Content-Length 433 * header field, the latter MUST be ignored. 434 */ 435 436 // read up to the content-length or max_bodysize 437 // for keep alive we need to read the whole message to clean up the socket for the next read 438 if ( 439 !$this->keep_alive && 440 $this->max_bodysize && 441 $this->max_bodysize < $this->resp_headers['content-length'] 442 ) { 443 $length = $this->max_bodysize + 1; 444 } else { 445 $length = $this->resp_headers['content-length']; 446 } 447 448 $r_body = $this->readData($socket, $length, 'response (content-length limited)', true); 449 } elseif (!isset($this->resp_headers['transfer-encoding']) && $this->max_bodysize && !$this->keep_alive) { 450 $r_body = $this->readData($socket, $this->max_bodysize + 1, 'response (content-length limited)', true); 451 } elseif ((int)$this->status === 204) { 452 // request has no content 453 } else { 454 // read entire socket 455 while (!feof($socket)) { 456 $r_body .= $this->readData($socket, 4096, 'response (unlimited)', true); 457 } 458 } 459 460 // recheck body size, we might have read max_bodysize+1 or even the whole body, so we abort late here 461 if ($this->max_bodysize) { 462 if (strlen($r_body) > $this->max_bodysize) { 463 if ($this->max_bodysize_abort) { 464 throw new HTTPClientException('Allowed response size exceeded'); 465 } else { 466 $this->error = 'Allowed response size exceeded'; 467 } 468 } 469 } 470 } catch (HTTPClientException $err) { 471 $this->error = $err->getMessage(); 472 if ($err->getCode()) 473 $this->status = $err->getCode(); 474 unset(self::$connections[$connectionId]); 475 fclose($socket); 476 return false; 477 } 478 479 if ( 480 !$this->keep_alive || 481 (isset($this->resp_headers['connection']) && $this->resp_headers['connection'] == 'Close') 482 ) { 483 // close socket 484 fclose($socket); 485 unset(self::$connections[$connectionId]); 486 } 487 488 // decode gzip if needed 489 if ( 490 isset($this->resp_headers['content-encoding']) && 491 $this->resp_headers['content-encoding'] == 'gzip' && 492 strlen($r_body) > 10 && str_starts_with($r_body, "\x1f\x8b\x08") 493 ) { 494 $this->resp_body = @gzinflate(substr($r_body, 10)); 495 if ($this->resp_body === false) { 496 $this->error = 'Failed to decompress gzip encoded content'; 497 $this->resp_body = $r_body; 498 } 499 } else { 500 $this->resp_body = $r_body; 501 } 502 503 $this->debug('response body', $this->resp_body); 504 $this->redirect_count = 0; 505 return true; 506 } 507 508 /** 509 * Tries to establish a CONNECT tunnel via Proxy 510 * 511 * Protocol, Servername and Port will be stripped from the request URL when a successful CONNECT happened 512 * 513 * @param resource &$socket 514 * @param string &$requesturl 515 * @return bool true if a tunnel was established 516 * @throws HTTPClientException when a tunnel is needed but could not be established 517 */ 518 protected function ssltunnel(&$socket, &$requesturl) 519 { 520 if (!$this->useProxyForUrl($requesturl)) return false; 521 $requestinfo = parse_url($requesturl); 522 if ($requestinfo['scheme'] != 'https') return false; 523 if (empty($requestinfo['port'])) $requestinfo['port'] = 443; 524 525 // build request 526 $request = "CONNECT {$requestinfo['host']}:{$requestinfo['port']} HTTP/1.0" . HTTP_NL; 527 $request .= "Host: {$requestinfo['host']}" . HTTP_NL; 528 if ($this->proxy_user) { 529 $request .= 'Proxy-Authorization: Basic ' . 530 base64_encode($this->proxy_user . ':' . $this->proxy_pass) . HTTP_NL; 531 } 532 $request .= HTTP_NL; 533 534 $this->debug('SSL Tunnel CONNECT', $request); 535 $this->sendData($socket, $request, 'SSL Tunnel CONNECT'); 536 537 // read headers from socket 538 $r_headers = ''; 539 do { 540 $r_line = $this->readLine($socket, 'headers'); 541 $r_headers .= $r_line; 542 } while ($r_line != "\r\n" && $r_line != "\n"); 543 544 $this->debug('SSL Tunnel Response', $r_headers); 545 if (preg_match('/^HTTP\/1\.[01] 200/i', $r_headers)) { 546 // set correct peer name for verification (enabled since PHP 5.6) 547 stream_context_set_option($socket, 'ssl', 'peer_name', $requestinfo['host']); 548 549 // actually means neither SSLv2 nor SSLv3 550 $cryptoMethod = STREAM_CRYPTO_METHOD_SSLv23_CLIENT; 551 552 if (@stream_socket_enable_crypto($socket, true, $cryptoMethod)) { 553 $requesturl = ($requestinfo['path'] ?? '/') . 554 (empty($requestinfo['query']) ? '' : '?' . $requestinfo['query']); 555 return true; 556 } 557 558 throw new HTTPClientException( 559 'Failed to set up crypto for secure connection to ' . $requestinfo['host'], 560 -151 561 ); 562 } 563 564 throw new HTTPClientException('Failed to establish secure proxy connection', -150); 565 } 566 567 /** 568 * Safely write data to a socket 569 * 570 * @param resource $socket An open socket handle 571 * @param string $data The data to write 572 * @param string $message Description of what is being read 573 * @throws HTTPClientException 574 * 575 * @author Tom N Harris <tnharris@whoopdedo.org> 576 */ 577 protected function sendData($socket, $data, $message) 578 { 579 // send request 580 $towrite = strlen($data); 581 $written = 0; 582 while ($written < $towrite) { 583 // check timeout 584 $time_used = microtime(true) - $this->start; 585 if ($time_used > $this->timeout) 586 throw new HTTPClientException(sprintf('Timeout while sending %s (%.3fs)', $message, $time_used), -100); 587 if (feof($socket)) 588 throw new HTTPClientException("Socket disconnected while writing $message"); 589 590 // select parameters 591 $sel_r = null; 592 $sel_w = [$socket]; 593 $sel_e = null; 594 // wait for stream ready or timeout (1sec) 595 if (@stream_select($sel_r, $sel_w, $sel_e, 1) === false) { 596 usleep(1000); 597 continue; 598 } 599 600 // write to stream 601 $nbytes = fwrite($socket, substr($data, $written, 4096)); 602 if ($nbytes === false) 603 throw new HTTPClientException("Failed writing to socket while sending $message", -100); 604 $written += $nbytes; 605 } 606 } 607 608 /** 609 * Safely read data from a socket 610 * 611 * Reads up to a given number of bytes or throws an exception if the 612 * response times out or ends prematurely. 613 * 614 * @param resource $socket An open socket handle in non-blocking mode 615 * @param int $nbytes Number of bytes to read 616 * @param string $message Description of what is being read 617 * @param bool $ignore_eof End-of-file is not an error if this is set 618 * @return string 619 * 620 * @throws HTTPClientException 621 * @author Tom N Harris <tnharris@whoopdedo.org> 622 */ 623 protected function readData($socket, $nbytes, $message, $ignore_eof = false) 624 { 625 $r_data = ''; 626 // Does not return immediately so timeout and eof can be checked 627 if ($nbytes < 0) $nbytes = 0; 628 $to_read = $nbytes; 629 do { 630 $time_used = microtime(true) - $this->start; 631 if ($time_used > $this->timeout) 632 throw new HTTPClientException( 633 sprintf( 634 'Timeout while reading %s after %d bytes (%.3fs)', 635 $message, 636 strlen($r_data), 637 $time_used 638 ), 639 -100 640 ); 641 if (feof($socket)) { 642 if (!$ignore_eof) 643 throw new HTTPClientException("Premature End of File (socket) while reading $message"); 644 break; 645 } 646 647 if ($to_read > 0) { 648 // select parameters 649 $sel_r = [$socket]; 650 $sel_w = null; 651 $sel_e = null; 652 // wait for stream ready or timeout (1sec) 653 if (@stream_select($sel_r, $sel_w, $sel_e, 1) === false) { 654 usleep(1000); 655 continue; 656 } 657 658 $bytes = fread($socket, $to_read); 659 if ($bytes === false) 660 throw new HTTPClientException("Failed reading from socket while reading $message", -100); 661 $r_data .= $bytes; 662 $to_read -= strlen($bytes); 663 } 664 } while ($to_read > 0 && strlen($r_data) < $nbytes); 665 return $r_data; 666 } 667 668 /** 669 * Safely read a \n-terminated line from a socket 670 * 671 * Always returns a complete line, including the terminating \n. 672 * 673 * @param resource $socket An open socket handle in non-blocking mode 674 * @param string $message Description of what is being read 675 * @return string 676 * 677 * @throws HTTPClientException 678 * @author Tom N Harris <tnharris@whoopdedo.org> 679 */ 680 protected function readLine($socket, $message) 681 { 682 $r_data = ''; 683 do { 684 $time_used = microtime(true) - $this->start; 685 if ($time_used > $this->timeout) 686 throw new HTTPClientException( 687 sprintf('Timeout while reading %s (%.3fs) >%s<', $message, $time_used, $r_data), 688 -100 689 ); 690 if (feof($socket)) 691 throw new HTTPClientException("Premature End of File (socket) while reading $message"); 692 693 // select parameters 694 $sel_r = [$socket]; 695 $sel_w = null; 696 $sel_e = null; 697 // wait for stream ready or timeout (1sec) 698 if (@stream_select($sel_r, $sel_w, $sel_e, 1) === false) { 699 usleep(1000); 700 continue; 701 } 702 703 $r_data = fgets($socket, 1024); 704 } while (!preg_match('/\n$/', $r_data)); 705 return $r_data; 706 } 707 708 /** 709 * print debug info 710 * 711 * Uses _debug_text or _debug_html depending on the SAPI name 712 * 713 * @param string $info 714 * @param mixed $var 715 * @author Andreas Gohr <andi@splitbrain.org> 716 * 717 */ 718 protected function debug($info, $var = null) 719 { 720 if (!$this->debug) return; 721 if (PHP_SAPI == 'cli') { 722 $this->debugText($info, $var); 723 } else { 724 $this->debugHtml($info, $var); 725 } 726 } 727 728 /** 729 * print debug info as HTML 730 * 731 * @param string $info 732 * @param mixed $var 733 */ 734 protected function debugHtml($info, $var = null) 735 { 736 echo '<b>' . $info . '</b> ' . (microtime(true) - $this->start) . 's<br />'; 737 if (!is_null($var)) { 738 ob_start(); 739 print_r($var); 740 $content = htmlspecialchars(ob_get_contents()); 741 ob_end_clean(); 742 echo '<pre>' . $content . '</pre>'; 743 } 744 } 745 746 /** 747 * prints debug info as plain text 748 * 749 * @param string $info 750 * @param mixed $var 751 */ 752 protected function debugText($info, $var = null) 753 { 754 echo '*' . $info . '* ' . (microtime(true) - $this->start) . "s\n"; 755 if (!is_null($var)) print_r($var); 756 echo "\n-----------------------------------------------\n"; 757 } 758 759 /** 760 * convert given header string to Header array 761 * 762 * All Keys are lowercased. 763 * 764 * @param string $string 765 * @return array 766 * @author Andreas Gohr <andi@splitbrain.org> 767 * 768 */ 769 protected function parseHeaders($string) 770 { 771 $headers = []; 772 $lines = explode("\n", $string); 773 array_shift($lines); //skip first line (status) 774 foreach ($lines as $line) { 775 [$key, $val] = sexplode(':', $line, 2, ''); 776 $key = trim($key); 777 $val = trim($val); 778 $key = strtolower($key); 779 if (!$key) continue; 780 if (isset($headers[$key])) { 781 if (is_array($headers[$key])) { 782 $headers[$key][] = $val; 783 } else { 784 $headers[$key] = [$headers[$key], $val]; 785 } 786 } else { 787 $headers[$key] = $val; 788 } 789 } 790 return $headers; 791 } 792 793 /** 794 * convert given header array to header string 795 * 796 * @param array $headers 797 * @return string 798 * @author Andreas Gohr <andi@splitbrain.org> 799 * 800 */ 801 protected function buildHeaders($headers) 802 { 803 $string = ''; 804 foreach ($headers as $key => $value) { 805 if ($value === '') continue; 806 $string .= $key . ': ' . $value . HTTP_NL; 807 } 808 return $string; 809 } 810 811 /** 812 * get cookies as http header string 813 * 814 * @return string 815 * @author Andreas Goetz <cpuidle@gmx.de> 816 * 817 */ 818 protected function getCookies() 819 { 820 $headers = ''; 821 foreach ($this->cookies as $key => $val) { 822 $headers .= "$key=$val; "; 823 } 824 $headers = substr($headers, 0, -2); 825 if ($headers) $headers = "Cookie: $headers" . HTTP_NL; 826 return $headers; 827 } 828 829 /** 830 * Encode data for posting 831 * 832 * @param array $data 833 * @return string 834 * @author Andreas Gohr <andi@splitbrain.org> 835 * 836 */ 837 protected function postEncode($data) 838 { 839 return http_build_query($data, '', '&'); 840 } 841 842 /** 843 * Encode data for posting using multipart encoding 844 * 845 * @fixme use of urlencode might be wrong here 846 * @param array $data 847 * @return string 848 * @author Andreas Gohr <andi@splitbrain.org> 849 * 850 */ 851 protected function postMultipartEncode($data) 852 { 853 $boundary = '--' . $this->boundary; 854 $out = ''; 855 foreach ($data as $key => $val) { 856 $out .= $boundary . HTTP_NL; 857 if (!is_array($val)) { 858 $out .= 'Content-Disposition: form-data; name="' . urlencode($key) . '"' . HTTP_NL; 859 $out .= HTTP_NL; // end of headers 860 $out .= $val; 861 $out .= HTTP_NL; 862 } else { 863 $out .= 'Content-Disposition: form-data; name="' . urlencode($key) . '"'; 864 if ($val['filename']) $out .= '; filename="' . urlencode($val['filename']) . '"'; 865 $out .= HTTP_NL; 866 if ($val['mimetype']) $out .= 'Content-Type: ' . $val['mimetype'] . HTTP_NL; 867 $out .= HTTP_NL; // end of headers 868 $out .= $val['body']; 869 $out .= HTTP_NL; 870 } 871 } 872 $out .= "$boundary--" . HTTP_NL; 873 return $out; 874 } 875 876 /** 877 * Generates a unique identifier for a connection. 878 * 879 * @param string $server 880 * @param string $port 881 * @return string unique identifier 882 */ 883 protected function uniqueConnectionId($server, $port) 884 { 885 return "$server:$port"; 886 } 887 888 /** 889 * Should the Proxy be used for the given URL? 890 * 891 * Checks the exceptions 892 * 893 * @param string $url 894 * @return bool 895 */ 896 protected function useProxyForUrl($url) 897 { 898 return $this->proxy_host && (!$this->proxy_except || !preg_match('/' . $this->proxy_except . '/i', $url)); 899 } 900} 901