wcfsetup/install/files/lib/util/HTTPRequest.class.php

   1 <?php
   2 namespace wcf\util;
   3 use wcf\system\exception\HTTPNotFoundException;
   4 use wcf\system\exception\HTTPServerErrorException;
   5 use wcf\system\exception\HTTPUnauthorizedException;
   6 use wcf\system\exception\SystemException;
   7 use wcf\system\io\RemoteFile;
   8 use wcf\system\Regex;
   9 use wcf\system\WCF;
  10
  11 /**
  12  * Sends HTTP/1.1 requests.
  13  * It supports POST, SSL, Basic Auth etc.
  14  *
  15  * @author      Tim Duesterhus
  16  * @copyright   2001-2014 WoltLab GmbH
  17  * @license     GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
  18  * @package     com.woltlab.wcf
  19  * @subpackage  util
  20  * @category    Community Framework
  21  */
  22 final class HTTPRequest {
  23         /**
  24          * given options
  25          * @var array
  26          */
  27         private $options = array();
  28
  29         /**
  30          * given post parameters
  31          * @var array
  32          */
  33         private $postParameters = array();
  34
  35         /**
  36          * given files
  37          * @var array
  38          */
  39         private $files = array();
  40
  41         /**
  42          * indicates if request will be made via SSL
  43          * @var boolean
  44          */
  45         private $useSSL = false;
  46
  47         /**
  48          * target host
  49          * @var string
  50          */
  51         private $host;
  52
  53         /**
  54          * target port
  55          * @var integer
  56          */
  57         private $port;
  58
  59         /**
  60          * target path
  61          * @var string
  62          */
  63         private $path;
  64
  65         /**
  66          * target query string
  67          * @var string
  68          */
  69         private $query;
  70
  71         /**
  72          * request URL
  73          * @var string
  74          */
  75         private $url = '';
  76
  77         /**
  78          * request headers
  79          * @var array<string>
  80          */
  81         private $headers = array();
  82
  83         /**
  84          * legacy headers
  85          * @var array<string>
  86          */
  87         private $legacyHeaders = array();
  88
  89         /**
  90          * request body
  91          * @var string
  92          */
  93         private $body = '';
  94
  95         /**
  96          * reply headers
  97          * @var array<string>
  98          */
  99         private $replyHeaders = array();
 100
 101         /**
 102          * reply body
 103          * @var string
 104          */
 105         private $replyBody = '';
 106
 107         /**
 108          * reply status code
 109          * @var integer
 110          */
 111         private $statusCode = 0;
 112
 113         /**
 114          * Constructs a new instance of HTTPRequest.
 115          *
 116          * @param       string          $url            URL to connect to
 117          * @param       array<string>   $options
 118          * @param       mixed           $postParameters Parameters to send via POST
 119          * @param       array           $files          Files to attach to the request
 120          */
 121         public function __construct($url, array $options = array(), $postParameters = array(), array $files = array()) {
 122                 $this->setURL($url);
 123
 124                 $this->postParameters = $postParameters;
 125                 $this->files = $files;
 126
 127                 $this->setOptions($options);
 128
 129                 // set default headers
 130                 $this->addHeader('user-agent', "HTTP.PHP (HTTPRequest.class.php; WoltLab Community Framework/".WCF_VERSION."; ".WCF::getLanguage()->languageCode.")");
 131                 $this->addHeader('accept', '*/*');
 132                 $this->addHeader('accept-language', WCF::getLanguage()->getFixedLanguageCode());
 133
 134                 if (isset($this->options['maxLength'])) {
 135                         $this->addHeader('Range', 'bytes=0-'.($this->options['maxLength'] - 1));
 136                 }
 137
 138                 if ($this->options['method'] !== 'GET') {
 139                         if (empty($this->files)) {
 140                                 if (is_array($postParameters)) {
 141                                         $this->body = http_build_query($this->postParameters, '', '&');
 142                                 }
 143                                 else if (is_string($postParameters) && !empty($postParameters)) {
 144                                         $this->body = $postParameters;
 145                                 }
 146
 147                                 $this->addHeader('content-type', 'application/x-www-form-urlencoded');
 148                         }
 149                         else {
 150                                 $boundary = StringUtil::getRandomID();
 151                                 $this->addHeader('content-type', 'multipart/form-data; boundary='.$boundary);
 152
 153                                 // source of the iterators: http://stackoverflow.com/a/7623716/782822
 154                                 if (!empty($this->postParameters)) {
 155                                         $iterator = new \RecursiveIteratorIterator(new \RecursiveArrayIterator($this->postParameters), \RecursiveIteratorIterator::SELF_FIRST);
 156                                         foreach ($iterator as $k => $v) {
 157                                                 if (!$iterator->hasChildren()) {
 158                                                         $key = '';
 159                                                         for ($i = 0, $max = $iterator->getDepth(); $i <= $max; $i++) {
 160                                                                 if ($i === 0) $key .= $iterator->getSubIterator($i)->key();
 161                                                                 else $key .= '['.$iterator->getSubIterator($i)->key().']';
 162                                                         }
 163
 164                                                         $this->body .= "--".$boundary."\r\n";
 165                                                         $this->body .= 'Content-Disposition: form-data; name="'.$key.'"'."\r\n\r\n";
 166                                                         $this->body .= $v."\r\n";
 167                                                 }
 168                                         }
 169                                 }
 170
 171                                 $iterator = new \RecursiveIteratorIterator(new \RecursiveArrayIterator($this->files), \RecursiveIteratorIterator::SELF_FIRST);
 172                                 foreach ($iterator as $k => $v) {
 173                                         if (!$iterator->hasChildren()) {
 174                                                 $key = '';
 175                                                 for ($i = 0, $max = $iterator->getDepth(); $i <= $max; $i++) {
 176                                                         if ($i === 0) $key .= $iterator->getSubIterator($i)->key();
 177                                                         else $key .= '['.$iterator->getSubIterator($i)->key().']';
 178                                                 }
 179
 180                                                 $this->body .= "--".$boundary."\r\n";
 181                                                 $this->body .= 'Content-Disposition: form-data; name="'.$k.'"; filename="'.basename($v).'"'."\r\n";
 182                                                 $this->body .= 'Content-Type: '.(FileUtil::getMimeType($v) ?: 'application/octet-stream.')."\r\n\r\n";
 183                                                 $this->body .= file_get_contents($v)."\r\n";
 184                                         }
 185                                 }
 186
 187                                 $this->body .= "--".$boundary."--";
 188                         }
 189                         $this->addHeader('content-length', strlen($this->body));
 190                 }
 191                 if (isset($this->options['auth'])) {
 192                         $this->addHeader('authorization', "Basic ".base64_encode($options['auth']['username'].":".$options['auth']['password']));
 193                 }
 194                 $this->addHeader('host', $this->host.($this->port != ($this->useSSL ? 443 : 80) ? ':'.$this->port : ''));
 195                 $this->addHeader('connection', 'Close');
 196         }
 197
 198         /**
 199          * Parses the given URL and applies PROXY_SERVER_HTTP.
 200          *
 201          * @param       string          $url
 202          */
 203         private function setURL($url) {
 204                 if (PROXY_SERVER_HTTP) {
 205                         $parsedUrl = parse_url(PROXY_SERVER_HTTP);
 206                         $this->path = $url;
 207                 }
 208                 else {
 209                         $parsedUrl = parse_url($url);
 210                         $this->path = isset($parsedUrl['path']) ? $parsedUrl['path'] : '/';
 211                 }
 212
 213                 $this->useSSL = $parsedUrl['scheme'] === 'https';
 214                 $this->host = $parsedUrl['host'];
 215                 $this->port = isset($parsedUrl['port']) ? $parsedUrl['port'] : ($this->useSSL ? 443 : 80);
 216                 $this->query = isset($parsedUrl['query']) ? $parsedUrl['query'] : '';
 217
 218                 // update the 'Host:' header if URL has changed
 219                 if (!empty($this->url) && $this->url != $url) {
 220                         $this->addHeader('host', $this->host.($this->port != ($this->useSSL ? 443 : 80) ? ':'.$this->port : ''));
 221                 }
 222
 223                 $this->url = $url;
 224         }
 225
 226         /**
 227          * Executes the HTTP request.
 228          */
 229         public function execute() {
 230                 // connect
 231                 $remoteFile = new RemoteFile(($this->useSSL ? 'ssl://' : '').$this->host, $this->port, $this->options['timeout']);
 232
 233                 $request = $this->options['method']." ".$this->path.($this->query ? '?'.$this->query : '')." HTTP/1.1\r\n";
 234
 235                 // add headers
 236                 foreach ($this->headers as $name => $values) {
 237                         foreach ($values as $value) {
 238                                 $request .= $name.": ".$value."\r\n";
 239                         }
 240                 }
 241                 $request .= "\r\n";
 242
 243                 // add post parameters
 244                 if ($this->options['method'] !== 'GET') $request .= $this->body."\r\n\r\n";
 245
 246                 $remoteFile->puts($request);
 247
 248                 $inHeader = true;
 249                 $this->replyHeaders = array();
 250                 $this->replyBody = '';
 251                 $chunkLength = 0;
 252                 $bodyLength = 0;
 253
 254                 // read http response, until one of is true
 255                 // a) EOF is reached
 256                 // b) bodyLength is at least maxLength
 257                 // c) bodyLength is at least Content-Length
 258                 while (!(
 259                         $remoteFile->eof() ||
 260                         (isset($this->options['maxLength']) && $bodyLength >= $this->options['maxLength']) ||
 261                         (isset($this->replyHeaders['content-length']) && $bodyLength >= end($this->replyHeaders['content-length']))
 262                 )) {
 263
 264                         if ($chunkLength) {
 265                                 if (isset($this->options['maxLength'])) $chunkLength = min($chunkLength, $this->options['maxLength'] - $bodyLength);
 266                                 $line = $remoteFile->read($chunkLength);
 267                         }
 268                         else if (!$inHeader) {
 269                                 $length = min(1024, $this->options['maxLength'] - $bodyLength);
 270                                 if (isset($this->replyHeaders['content-length'])) $length = min($length, end($this->replyHeaders['content-length']) - $bodyLength);
 271
 272                                 $line = $remoteFile->read($length);
 273                         }
 274                         else {
 275                                 $line = $remoteFile->gets();
 276                         }
 277
 278                         if ($inHeader) {
 279                                 if (rtrim($line) === '') {
 280                                         $inHeader = false;
 281                                         $this->parseReplyHeaders();
 282
 283                                         continue;
 284                                 }
 285                                 $this->replyHeaders[] = $line;
 286                         }
 287                         else {
 288                                 $chunkedTransferRegex = new Regex('(^|,)[ \t]*chunked[ \t]*$', Regex::CASE_INSENSITIVE);
 289                                 if (isset($this->replyHeaders['transfer-encoding']) && $chunkedTransferRegex->match(end($this->replyHeaders['transfer-encoding']))) {
 290                                         // last chunk finished
 291                                         if ($chunkLength === 0) {
 292                                                 // read hex data and trash chunk-extension
 293                                                 list($hex) = explode(';', $line, 2);
 294                                                 $chunkLength = hexdec($hex);
 295
 296                                                 // $chunkLength === 0 -> no more data
 297                                                 if ($chunkLength === 0) {
 298                                                         // clear remaining response
 299                                                         while (!$remoteFile->gets(1024));
 300
 301                                                         // remove chunked from transfer-encoding
 302                                                         $this->replyHeaders['transfer-encoding'] = array_filter(array_map(function ($element) use ($chunkedTransferRegex) {
 303                                                                 return $chunkedTransferRegex->replace($element, '');
 304                                                         }, $this->replyHeaders['transfer-encoding']), 'trim');
 305                                                         if (empty($this->replyHeaders['transfer-encoding'])) unset($this->replyHeaders['transfer-encoding']);
 306
 307                                                         // break out of main reading loop
 308                                                         break;
 309                                                 }
 310                                         }
 311                                         else {
 312                                                 $this->replyBody .= $line;
 313                                                 $chunkLength -= strlen($line);
 314                                                 $bodyLength += strlen($line);
 315                                                 if ($chunkLength === 0) $remoteFile->read(2); // CRLF
 316                                         }
 317                                 }
 318                                 else {
 319                                         $this->replyBody .= $line;
 320                                         $bodyLength += strlen($line);
 321                                 }
 322                         }
 323                 }
 324
 325                 if (isset($this->options['maxLength'])) $this->replyBody = substr($this->replyBody, 0, $this->options['maxLength']);
 326
 327                 $remoteFile->close();
 328
 329                 $this->parseReply();
 330         }
 331
 332         /**
 333          * Parses the reply headers.
 334          */
 335         private function parseReplyHeaders() {
 336                 $headers = array();
 337                 $lastKey = '';
 338                 foreach ($this->replyHeaders as $header) {
 339                         if (strpos($header, ':') === false) {
 340                                 $headers[trim($header)] = array(trim($header));
 341                                 continue;
 342                         }
 343
 344                         // 4.2 Header fields can be
 345                         // extended over multiple lines by preceding each extra line with at
 346                         // least one SP or HT.
 347                         if (ltrim($header, "\t ") !== $header) {
 348                                 $headers[$lastKey][] = array_pop($headers[$lastKey]).' '.trim($header);
 349                         }
 350                         else {
 351                                 list($key, $value) = explode(':', $header, 2);
 352
 353                                 $lastKey = $key;
 354                                 if (!isset($headers[$key])) $headers[$key] = array();
 355                                 $headers[$key][] = trim($value);
 356                         }
 357                 }
 358                 // 4.2 Field names are case-insensitive.
 359                 $this->replyHeaders = array_change_key_case($headers);
 360                 if (isset($this->replyHeaders['transfer-encoding'])) $this->replyHeaders['transfer-encoding'] = array(implode(',', $this->replyHeaders['transfer-encoding']));
 361                 $this->legacyHeaders = array_map('end', $headers);
 362
 363                 // get status code
 364                 $statusLine = reset($this->replyHeaders);
 365                 $regex = new Regex('^HTTP/1.\d+ +(\d{3})');
 366                 if (!$regex->match($statusLine[0])) throw new SystemException("Unexpected status '".$statusLine."'");
 367                 $matches = $regex->getMatches();
 368                 $this->statusCode = $matches[1];
 369         }
 370
 371         /**
 372          * Parses the reply.
 373          */
 374         private function parseReply() {
 375                 // 4.4 Messages MUST NOT include both a Content-Length header field and a
 376                 // non-identity transfer-coding. If the message does include a non-
 377                 // identity transfer-coding, the Content-Length MUST be ignored.
 378                 if (isset($this->replyHeaders['content-length']) && (!isset($this->replyHeaders['transfer-encoding']) || strtolower(end($this->replyHeaders['transfer-encoding'])) !== 'identity') && !isset($this->options['maxLength'])) {
 379                         if (strlen($this->replyBody) != end($this->replyHeaders['content-length'])) {
 380                                 throw new SystemException('Body length does not match length given in header');
 381                         }
 382                 }
 383
 384                 // validate status code
 385                 switch ($this->statusCode) {
 386                         case '301':
 387                         case '302':
 388                         case '303':
 389                         case '307':
 390                                 // redirect
 391                                 if ($this->options['maxDepth'] <= 0) throw new SystemException("Received status code '".$this->statusCode."' from server, but recursion level is exhausted");
 392
 393                                 $newRequest = clone $this;
 394                                 $newRequest->options['maxDepth']--;
 395
 396                                 // 10.3.4 The response to the request can be found under a different URI and SHOULD
 397                                 // be retrieved using a GET method on that resource.
 398                                 if ($this->statusCode == '303') {
 399                                         $newRequest->options['method'] = 'GET';
 400                                         $newRequest->postParameters = array();
 401                                         $newRequest->addHeader('content-length', '');
 402                                         $newRequest->addHeader('content-type', '');
 403                                 }
 404
 405                                 try {
 406                                         $newRequest->setURL(end($this->replyHeaders['location']));
 407                                 }
 408                                 catch (SystemException $e) {
 409                                         throw new SystemException("Received 'Location: ".end($this->replyHeaders['location'])."' from server, which is invalid.", 0, $e);
 410                                 }
 411
 412                                 try {
 413                                         $newRequest->execute();
 414
 415                                         // update data with data from the inner request
 416                                         $this->url = $newRequest->url;
 417                                         $this->statusCode = $newRequest->statusCode;
 418                                         $this->replyHeaders = $newRequest->replyHeaders;
 419                                         $this->replyBody = $newRequest->replyBody;
 420                                 }
 421                                 catch (SystemException $e) {
 422                                         // update data with data from the inner request
 423                                         $this->url = $newRequest->url;
 424                                         $this->statusCode = $newRequest->statusCode;
 425                                         $this->replyHeaders = $newRequest->replyHeaders;
 426                                         $this->replyBody = $newRequest->replyBody;
 427
 428                                         throw $e;
 429                                 }
 430
 431                                 return;
 432                         break;
 433
 434                         case '206':
 435                                 // check, if partial content was expected
 436                                 if (!isset($this->headers['range'])) {
 437                                         throw new HTTPServerErrorException("Received unexpected status code '206' from server");
 438                                 }
 439                                 else if (!isset($this->replyHeaders['content-range'])) {
 440                                         throw new HTTPServerErrorException("Content-Range is missing in reply header");
 441                                 }
 442                         break;
 443
 444                         case '401':
 445                         case '402':
 446                         case '403':
 447                                 throw new HTTPUnauthorizedException("Received status code '".$this->statusCode."' from server");
 448                         break;
 449
 450                         case '404':
 451                                 throw new HTTPNotFoundException("Received status code '404' from server");
 452                         break;
 453
 454                         default:
 455                                 // 6.1.1 However, applications MUST
 456                                 // understand the class of any status code, as indicated by the first
 457                                 // digit, and treat any unrecognized response as being equivalent to the
 458                                 // x00 status code of that class, with the exception that an
 459                                 // unrecognized response MUST NOT be cached.
 460                                 switch (substr($this->statusCode, 0, 1)) {
 461                                         case '2': // 200 and unknown 2XX
 462                                         case '3': // 300 and unknown 3XX
 463                                                 // we are fine
 464                                         break;
 465                                         case '5': // 500 and unknown 5XX
 466                                                 throw new HTTPServerErrorException("Received status code '".$this->statusCode."' from server");
 467                                         break;
 468                                         default:
 469                                                 throw new SystemException("Received unhandled status code '".$this->statusCode."' from server");
 470                                         break;
 471                                 }
 472                         break;
 473                 }
 474         }
 475
 476         /**
 477          * Returns an array with the replied data.
 478          * Note that the 'headers' element is deprecated and may be removed in the future.
 479          *
 480          * @return      array
 481          */
 482         public function getReply() {
 483                 return array(
 484                         'statusCode' => $this->statusCode,
 485                         'headers' => $this->legacyHeaders,
 486                         'httpHeaders' => $this->replyHeaders,
 487                         'body' => $this->replyBody,
 488                         'url' => $this->url
 489                 );
 490         }
 491
 492         /**
 493          * Sets options and applies default values when an option is omitted.
 494          *
 495          * @param       array           $options
 496          */
 497         private function setOptions(array $options) {
 498                 if (!isset($options['timeout'])) {
 499                         $options['timeout'] = 10;
 500                 }
 501
 502                 if (!isset($options['method'])) {
 503                         $options['method'] = (!empty($this->postParameters) || !empty($this->files) ? 'POST' : 'GET');
 504                 }
 505
 506                 if (!isset($options['maxDepth'])) {
 507                         $options['maxDepth'] = 2;
 508                 }
 509
 510                 if (isset($options['auth'])) {
 511                         if (!isset($options['auth']['username'])) {
 512                                 throw new SystemException('Username is missing in authentification data.');
 513                         }
 514                         if (!isset($options['auth']['password'])) {
 515                                 throw new SystemException('Password is missing in authentification data.');
 516                         }
 517                 }
 518
 519                 $this->options = $options;
 520         }
 521
 522         /**
 523          * Adds a header to this request.
 524          * When an empty value is given existing headers of this name will be removed. When append
 525          * is set to false existing values will be overwritten.
 526          *
 527          * @param       string          $name
 528          * @param       string          $value
 529          * @param       boolean         $append
 530          */
 531         public function addHeader($name, $value, $append = false) {
 532                 // 4.2 Field names are case-insensitive.
 533                 $name = strtolower($name);
 534
 535                 if ($value === '') {
 536                         unset($this->headers[$name]);
 537                         return;
 538                 }
 539
 540                 if ($append && isset($this->headers[$name])) {
 541                         $this->headers[$name][] = $value;
 542                 }
 543                 else {
 544                         $this->headers[$name] = array($value);
 545                 }
 546         }
 547
 548         /**
 549          * Resets reply data when cloning.
 550          */
 551         private function __clone() {
 552                 $this->replyHeaders = array();
 553                 $this->replyBody = '';
 554                 $this->statusCode = 0;
 555         }
 556 }