wcfsetup/install.php

   1 <?php
   2 /**
   3  * This script tries to find the temp folder and unzip all setup files into.
   4  *
   5  * @author      Marcel Werk
   6  * @copyright   2001-2013 WoltLab GmbH
   7  * @license     GNU Lesser General Public License <http://opensource.org/licenses/lgpl-license.php>
   8  */
   9 // define constants
  10 define('INSTALL_SCRIPT', __FILE__);
  11 define('INSTALL_SCRIPT_DIR', dirname(__FILE__).'/');
  12 define('SETUP_FILE', INSTALL_SCRIPT_DIR . 'WCFSetup.tar.gz');
  13 define('NO_IMPORTS', 1);
  14
  15 // set exception handler
  16 set_exception_handler('handleException');
  17 // set php error handler
  18 set_error_handler('handleError', E_ALL);
  19
  20 // define list of needed file
  21 $neededFilesPattern = array(
  22         '!^setup/.*!',
  23         '!^install/files/acp/images/wcfLogo.*!',
  24         '!^install/files/acp/style/setup/.*!',
  25         '!^install/files/lib/data/.*!',
  26         '!^install/files/icon/.*!',
  27         '!^install/files/font/.*!',
  28         '!^install/files/lib/system/.*!',
  29         '!^install/files/lib/util/.*!',
  30         '!^install/lang/.*!',
  31         '!^install/packages/.*!');
  32
  33 // define needed functions and classes
  34 /**
  35  * WCF::handleException() calls the show method on exceptions that implement this interface.
  36  *
  37  * @package     com.woltlab.wcf
  38  * @author      Marcel Werk
  39  */
  40 interface IPrintableException {
  41         public function show();
  42 }
  43
  44 // define needed classes
  45 // needed are:
  46 // SystemException, PrintableException, BasicFileUtil, Tar, File, ZipFile
  47 /**
  48  * A SystemException is thrown when an unexpected error occurs.
  49  *
  50  * @package     com.woltlab.wcf
  51  * @author      Marcel Werk
  52  */
  53 class SystemException extends \Exception implements IPrintableException {
  54         protected $description;
  55         protected $information = '';
  56         protected $functions = '';
  57
  58         /**
  59          * Creates a new SystemException.
  60          *
  61          * @param       message         string          error message
  62          * @param       code            integer         error code
  63          * @param       description     string          description of the error
  64          */
  65         public function __construct($message = '', $code = 0, $description = '') {
  66                 parent::__construct($message, $code);
  67                 $this->description = $description;
  68         }
  69
  70         /**
  71          * Returns the description of this exception.
  72          *
  73          * @return      string
  74          */
  75         public function getDescription() {
  76                 return $this->description;
  77         }
  78
  79         /**
  80          * Prints this exception.
  81          * This method is called by WCF::handleException().
  82          */
  83         public function show() {
  84                 ?>
  85 <html>
  86 <head>
  87 <title>Fatal error: <?php echo htmlspecialchars($this->getMessage()); ?></title>
  88
  89 <style type="text/css">
  90         body {
  91                 font-family: Verdana, Helvetica, sans-serif;
  92                 font-size: 0.8em;
  93         }
  94         div {
  95                 border: 1px outset lightgrey;
  96                 padding: 3px;
  97                 background-color: lightgrey;
  98         }
  99
 100         div div {
 101                 border: 1px inset lightgrey;
 102                 padding: 4px;
 103         }
 104
 105         h1 {
 106                 background-color: #154268;
 107                 padding: 4px;
 108                 color: #fff;
 109                 margin: 0 0 3px 0;
 110                 font-size: 1.15em;
 111         }
 112         h2 {
 113                 font-size: 1.1em;
 114                 margin-bottom: 0;
 115         }
 116
 117         pre, p {
 118                 margin: 0;
 119         }
 120 </style>
 121 </head>
 122
 123 <body>
 124         <div>
 125                 <h1>Fatal error: <?php echo htmlspecialchars($this->getMessage()); ?></h1>
 126
 127                 <div>
 128                         <p><?php echo $this->getDescription(); ?></p>
 129                         <?php if ($this->getCode()) { ?><p>You get more information about the problem in our knowledge base: <a href="http://www.woltlab.com/help/?code=<?php echo intval($this->getCode()); ?>">http://www.woltlab.com/help/?code=<?php echo intval($this->getCode()); ?></a></p><?php } ?>
 130
 131                         <h2>Information:</h2>
 132                         <p>
 133                                 <b>error message:</b> <?php echo htmlspecialchars($this->getMessage()); ?><br />
 134                                 <b>error code:</b> <?php echo intval($this->getCode()); ?><br />
 135                                 <?php echo $this->information; ?>
 136                                 <b>file:</b> <?php echo htmlspecialchars($this->getFile()); ?> (<?php echo $this->getLine(); ?>)<br />
 137                                 <b>php version:</b> <?php echo htmlspecialchars(phpversion()); ?><br />
 138                                 <b>wcf version:</b> <?php if (defined('WCF_VERSION')) echo WCF_VERSION; ?><br />
 139                                 <b>date:</b> <?php echo gmdate('r'); ?><br />
 140                                 <b>request:</b> <?php if (isset($_SERVER['REQUEST_URI'])) echo htmlspecialchars($_SERVER['REQUEST_URI']); ?><br />
 141                                 <b>referer:</b> <?php if (isset($_SERVER['HTTP_REFERER'])) echo htmlspecialchars($_SERVER['HTTP_REFERER']); ?><br />
 142                         </p>
 143
 144                         <h2>Stacktrace:</h2>
 145                         <pre><?php echo htmlspecialchars($this->getTraceAsString()); ?></pre>
 146                 </div>
 147
 148                 <?php echo $this->functions; ?>
 149         </div>
 150 </body>
 151 </html>
 152
 153 <?php
 154         }
 155 }
 156
 157
 158 /**
 159  * Loads the required classes automatically.
 160  */
 161 function __autoload($className) {
 162         $namespaces = explode('\\', $className);
 163         if (count($namespaces) > 1) {
 164                 // remove 'wcf' component
 165                 array_shift($namespaces);
 166
 167                 $className = implode('/', $namespaces);
 168                 $classPath = TMP_DIR . 'install/files/lib/' . $className . '.class.php';
 169                 if (file_exists($classPath)) {
 170                         require_once($classPath);
 171                 }
 172         }
 173 }
 174
 175 /**
 176  * Escapes strings for execution in sql queries.
 177  */
 178 function escapeString($string) {
 179         return \wcf\system\WCF::getDB()->escapeString($string);
 180 }
 181
 182 /**
 183  * Calls the show method on the given exception.
 184  *
 185  * @param       Exception       $e
 186  */
 187 function handleException(\Exception $e) {
 188         if ($e instanceof IPrintableException || $e instanceof \wcf\system\exception\IPrintableException) {
 189                 $e->show();
 190                 exit;
 191         }
 192
 193         print $e;
 194 }
 195
 196 /**
 197  * Catches php errors and throws instead a system exception.
 198  *
 199  * @param       integer         $errorNo
 200  * @param       string          $message
 201  * @param       string          $filename
 202  * @param       integer         $lineNo
 203  */
 204 function handleError($errorNo, $message, $filename, $lineNo) {
 205         if (error_reporting() != 0) {
 206                 $type = 'error';
 207                 switch ($errorNo) {
 208                         case 2: $type = 'warning';
 209                                 break;
 210                         case 8: $type = 'notice';
 211                                 break;
 212                 }
 213
 214                 throw new SystemException('PHP '.$type.' in file '.$filename.' ('.$lineNo.'): '.$message, 0);
 215         }
 216 }
 217
 218 /**
 219  * BasicFileUtil contains file-related functions.
 220  *
 221  * @package     com.woltlab.wcf
 222  * @author      Marcel Werk
 223  */
 224 class BasicFileUtil {
 225         /**
 226          * chmod mode
 227          * @var integer
 228          */
 229         protected static $mode = null;
 230
 231         /**
 232          * Tries to find the temp folder.
 233          *
 234          * @return      string
 235          */
 236         public static function getTempFolder() {
 237                 // use tmp folder in document root by default
 238                 if (!empty($_SERVER['DOCUMENT_ROOT'])) {
 239                         if (strpos($_SERVER['DOCUMENT_ROOT'], 'strato') !== false) {
 240                                 // strato bugfix
 241                                 // create tmp folder in document root automatically
 242                                 if (!@file_exists($_SERVER['DOCUMENT_ROOT'].'/tmp')) {
 243                                         @mkdir($_SERVER['DOCUMENT_ROOT'].'/tmp/', 0777);
 244                                         try {
 245                                                 self::makeWritable($_SERVER['DOCUMENT_ROOT'].'/tmp/');
 246                                         }
 247                                         catch (SystemException $e) {}
 248                                 }
 249                         }
 250                         if (@file_exists($_SERVER['DOCUMENT_ROOT'].'/tmp') && @is_writable($_SERVER['DOCUMENT_ROOT'].'/tmp')) {
 251                                 return $_SERVER['DOCUMENT_ROOT'].'/tmp/';
 252                         }
 253                 }
 254
 255                 if (isset($_ENV['TMP']) && @is_writable($_ENV['TMP'])) {
 256                         return $_ENV['TMP'] . '/';
 257                 }
 258                 if (isset($_ENV['TEMP']) && @is_writable($_ENV['TEMP'])) {
 259                         return $_ENV['TEMP'] . '/';
 260                 }
 261                 if (isset($_ENV['TMPDIR']) && @is_writable($_ENV['TMPDIR'])) {
 262                         return $_ENV['TMPDIR'] . '/';
 263                 }
 264
 265                 if (($path = ini_get('upload_tmp_dir')) && @is_writable($path)) {
 266                         return $path . '/';
 267                 }
 268                 if (@file_exists('/tmp/') && @is_writable('/tmp/')) {
 269                         return '/tmp/';
 270                 }
 271                 if (function_exists('session_save_path') && ($path = session_save_path()) && @is_writable($path)) {
 272                         return $path . '/';
 273                 }
 274
 275                 $path = INSTALL_SCRIPT_DIR.'tmp/';
 276                 if (@file_exists($path) && @is_writable($path)) {
 277                         return $path;
 278                 }
 279                 else {
 280                         throw new SystemException('There is no access to the system temporary folder due to an unknown reason and no user specific temporary folder exists in '.INSTALL_SCRIPT_DIR.'! This is a misconfiguration of your webserver software! Please create a folder called '.$path.' using your favorite ftp program, make it writable and then retry this installation.');
 281                 }
 282         }
 283
 284         /**
 285          * Returns the temp folder for the installation.
 286          *
 287          * @return      string
 288          */
 289         public static function getInstallTempFolder() {
 290                 $dir = self::getTempFolder() . TMP_FILE_PREFIX . '/';
 291                 @mkdir($dir);
 292                 self::makeWritable($dir);
 293
 294                 return $dir;
 295         }
 296
 297         /**
 298          * Tries to make a file or directory writable. It starts of with the least
 299          * permissions and goes up until 0666 for files and 0777 for directories.
 300          *
 301          * @param       string          $filename
 302          */
 303         public static function makeWritable($filename) {
 304                 if (!file_exists($filename)) {
 305                         return;
 306                 }
 307
 308                 // determine mode
 309                 if (self::$mode === null) {
 310                         // do not use PHP_OS here, as this represents the system it was built on != running on
 311                         if (strpos(php_uname(), 'Windows') !== false) {
 312                                 self::$mode = 0777;
 313                         }
 314                         else {
 315                                 self::$mode = 0666;
 316
 317                                 $tmpFilename = '__permissions_'.sha1(time()).'.txt';
 318                                 @touch($tmpFilename);
 319
 320                                 // create a new file and check the file owner, if it is the same
 321                                 // as this file (uploaded through FTP), we can safely grant write
 322                                 // permissions exclusively to the owner rather than everyone
 323                                 if (file_exists($tmpFilename)) {
 324                                         $scriptOwner = fileowner(__FILE__);
 325                                         $fileOwner = fileowner($tmpFilename);
 326
 327                                         if ($scriptOwner === $fileOwner) {
 328                                                 self::$mode = 0644;
 329                                         }
 330
 331                                         @unlink($tmpFilename);
 332                                 }
 333                         }
 334                 }
 335
 336                 $startIndex = 0;
 337                 if (is_dir($filename)) {
 338                         if (self::$mode == 0644) {
 339                                 @chmod($filename, 0755);
 340                         }
 341                         else {
 342                                 @chmod($filename, 0777);
 343                         }
 344                 }
 345                 else {
 346                         @chmod($filename, self::$mode);
 347                 }
 348
 349                 if (!is_writable($filename)) {
 350                         throw new SystemException("Unable to make '".$filename."' writable. This is a misconfiguration of your server, please contact your system administrator or hosting provider.");
 351                 }
 352         }
 353 }
 354
 355 /**
 356  * Opens tar or tar.gz archives.
 357  *
 358  * Usage:
 359  * ------
 360  * $tar = new Tar('archive.tar');
 361  * $contentList = $tar->getContentList();
 362  * foreach ($contentList as $key => $val) {
 363  *      $tar->extract($key, DESTINATION);
 364  * }
 365  */
 366 class Tar {
 367         protected $archiveName = '';
 368         protected $contentList = array();
 369         protected $opened = false;
 370         protected $read = false;
 371         protected $file = null;
 372         protected $isZipped = false;
 373         protected $mode = 'rb';
 374
 375         /**
 376          * Creates a new Tar object.
 377          * archiveName must be tarball or gzipped tarball
 378          *
 379          * @param       string          $archiveName
 380          */
 381         public function __construct($archiveName) {
 382                 if (!is_file($archiveName)) {
 383                         throw new SystemException("unable to find tar archive '".$archiveName."'");
 384                 }
 385
 386                 $this->archiveName = $archiveName;
 387                 $this->open();
 388                 $this->readContent();
 389         }
 390
 391         /**
 392          * Destructor of this class, closes tar archive.
 393          */
 394         public function __destruct() {
 395                 $this->close();
 396         }
 397
 398         /**
 399          * Opens the tar archive and stores filehandle.
 400          */
 401         public function open() {
 402                 if (!$this->opened) {
 403                         if ($this->isZipped) $this->file = new ZipFile($this->archiveName, $this->mode);
 404                         else {
 405                                 // test compression
 406                                 $this->file = new File($this->archiveName, $this->mode);
 407                                 if ($this->file->read(2) == "\37\213") {
 408                                         $this->file->close();
 409                                         $this->isZipped = true;
 410                                         $this->file = new ZipFile($this->archiveName, $this->mode);
 411                                 }
 412                                 else {
 413                                         $this->file->seek(0);
 414                                 }
 415                         }
 416                         $this->opened = true;
 417                 }
 418         }
 419
 420         /**
 421          * Closes the opened file.
 422          */
 423         public function close() {
 424                 if ($this->opened) {
 425                         $this->file->close();
 426                         $this->opened = false;
 427                 }
 428         }
 429
 430         /**
 431          * Returns the table of contents (TOC) list for this tar archive.
 432          *
 433          * @return      array           list of content
 434          */
 435         public function getContentList() {
 436                 if (!$this->read) {
 437                         $this->open();
 438                         $this->readContent();
 439                 }
 440                 return $this->contentList;
 441         }
 442
 443         /**
 444          * Returns an associative array with information
 445          * about a specific file in the archive.
 446          *
 447          * @param       mixed   $fileindex      index or name of the requested file
 448          * @return      array   $fileInfo
 449          */
 450         public function getFileInfo($fileIndex) {
 451                 if (!is_int($fileIndex)) {
 452                         $fileIndex = $this->getIndexByFilename($fileIndex);
 453                 }
 454
 455                 if (!isset($this->contentList[$fileIndex])) {
 456                         throw new SystemException("Tar: could find file '".$fileIndex."' in archive");
 457                 }
 458                 return $this->contentList[$fileIndex];
 459         }
 460
 461         /**
 462          * Searchs a file in the tar archive
 463          * and returns the numeric fileindex.
 464          * Returns false if not found.
 465          *
 466          * @param       string          $filename
 467          * @return      integer                 index of the requested file
 468          */
 469         public function getIndexByFilename($filename) {
 470                 foreach ($this->contentList as $index => $file) {
 471                         if ($file['filename'] == $filename) {
 472                                 return $index;
 473                         }
 474                 }
 475                 return false;
 476         }
 477
 478         /**
 479          * Extracts a specific file and returns the content as string.
 480          * Returns false if extraction failed.
 481          *
 482          * @param       mixed           $index          index or name of the requested file
 483          * @return      string                          content of the requested file
 484          */
 485         public function extractToString($index) {
 486                 if (!$this->read) {
 487                         $this->open();
 488                         $this->readContent();
 489                 }
 490                 $header = $this->getFileInfo($index);
 491
 492                 // can not extract a folder
 493                 if ($header['type'] != 'file') {
 494                         return false;
 495                 }
 496
 497                 // seek to offset
 498                 $this->file->seek($header['offset']);
 499
 500                 // read data
 501                 $content = '';
 502                 $n = floor($header['size'] / 512);
 503                 for($i = 0; $i < $n; $i++) {
 504                         $content .= $this->file->read(512);
 505                 }
 506                 if(($header['size'] % 512) != 0) {
 507                         $buffer = $this->file->read(512);
 508                         $content .= substr($buffer, 0, ($header['size'] % 512));
 509                 }
 510
 511                 return $content;
 512         }
 513
 514         /**
 515          * Extracts a specific file and writes it's content
 516          * to the file specified with $destination.
 517          *
 518          * @param       mixed           $index          index or name of the requested file
 519          * @param       string          $destination
 520          * @return      boolean $success
 521          */
 522         public function extract($index, $destination) {
 523                 if (!$this->read) {
 524                         $this->open();
 525                         $this->readContent();
 526                 }
 527                 $header = $this->getFileInfo($index);
 528
 529                 // can not extract a folder
 530                 if ($header['type'] != 'file') {
 531                         return false;
 532                 }
 533
 534                 // seek to offset
 535                 $this->file->seek($header['offset']);
 536
 537                 $targetFile = new File($destination);
 538
 539                 // read data
 540                 $n = floor($header['size'] / 512);
 541                 for ($i = 0; $i < $n; $i++) {
 542                         $content = $this->file->read(512);
 543                         $targetFile->write($content, 512);
 544                 }
 545                 if (($header['size'] % 512) != 0) {
 546                         $content = $this->file->read(512);
 547                         $targetFile->write($content, ($header['size'] % 512));
 548                 }
 549
 550                 $targetFile->close();
 551                 BasicFileUtil::makeWritable($destination);
 552
 553                 if ($header['mtime']) {
 554                         @$targetFile->touch($header['mtime']);
 555                 }
 556
 557                 // check filesize
 558                 if (filesize($destination) != $header['size']) {
 559                         throw new SystemException("Could not untar file '".$header['filename']."' to '".$destination."'. Maybe disk quota exceeded in folder '".dirname($destination)."'.");
 560                 }
 561
 562                 return true;
 563         }
 564
 565         /**
 566          * Reads table of contents (TOC) from tar archive.
 567          * This does not get the entire to memory but only parts of it.
 568          */
 569         protected function readContent() {
 570                 $this->contentList = array();
 571                 $this->read = true;
 572                 $i = 0;
 573
 574                 // Read the 512 bytes header
 575                 while (strlen($binaryData = $this->file->read(512)) != 0) {
 576                         // read header
 577                         $header = $this->readHeader($binaryData);
 578                         if ($header === false) {
 579                                 continue;
 580                         }
 581                         $this->contentList[$i] = $header;
 582                         $this->contentList[$i]['index'] = $i;
 583                         $i++;
 584
 585                         $this->file->seek($this->file->tell() + (512 * ceil(($header['size'] / 512))));
 586                 }
 587         }
 588
 589         /**
 590          * Unpacks file header for one file entry.
 591          *
 592          * @param       string          $binaryData
 593          * @return      array           $fileheader
 594          */
 595         protected function readHeader($binaryData) {
 596                 if (strlen($binaryData) != 512) {
 597                         return false;
 598                 }
 599
 600                 $header = array();
 601                 $checksum = 0;
 602                 // First part of the header
 603                 for ($i = 0; $i < 148; $i++) {
 604                         $checksum += ord(substr($binaryData, $i, 1));
 605                 }
 606                 // Calculate the checksum
 607                 // Ignore the checksum value and replace it by ' ' (space)
 608                 for ($i = 148; $i < 156; $i++) {
 609                         $checksum += ord(' ');
 610                 }
 611                 // Last part of the header
 612                 for ($i = 156; $i < 512; $i++) {
 613                         $checksum += ord(substr($binaryData, $i, 1));
 614                 }
 615
 616                 // Extract the values
 617                 //$data = unpack("a100filename/a8mode/a8uid/a8gid/a12size/a12mtime/a8checksum/a1typeflag/a100link/a6magic/a2version/a32uname/a32gname/a8devmajor/a8devminor", $binaryData);
 618                 if (version_compare(PHP_VERSION, '5.5.0-dev', '>=')) {
 619                         $format = 'Z100filename/Z8mode/Z8uid/Z8gid/Z12size/Z12mtime/Z8checksum/Z1typeflag/Z100link/Z6magic/Z2version/Z32uname/Z32gname/Z8devmajor/Z8devminor/Z155prefix';
 620                 }
 621                 else {
 622                         $format = 'a100filename/a8mode/a8uid/a8gid/a12size/a12mtime/a8checksum/a1typeflag/a100link/a6magic/a2version/a32uname/a32gname/a8devmajor/a8devminor/a155prefix';
 623                 }
 624
 625                 $data = unpack($format, $binaryData);
 626
 627                 // Extract the properties
 628                 $header['checksum'] = octDec(trim($data['checksum']));
 629                 if ($header['checksum'] == $checksum) {
 630                         $header['filename'] = trim($data['filename']);
 631                         $header['mode'] = octDec(trim($data['mode']));
 632                         $header['uid'] = octDec(trim($data['uid']));
 633                         $header['gid'] = octDec(trim($data['gid']));
 634                         $header['size'] = octDec(trim($data['size']));
 635                         $header['mtime'] = octDec(trim($data['mtime']));
 636                         $header['prefix'] = trim($data['prefix']);
 637                         if ($header['prefix']) {
 638                                 $header['filename'] = $header['prefix'].'/'.$header['filename'];
 639                         }
 640                         if (($header['typeflag'] = $data['typeflag']) == '5') {
 641                                 $header['size'] = 0;
 642                                 $header['type'] = 'folder';
 643                         }
 644                         else {
 645                                 $header['type'] = 'file';
 646                         }
 647                         $header['offset'] = $this->file->tell();
 648
 649                         return $header;
 650                 }
 651                 else {
 652                         return false;
 653                 }
 654         }
 655 }
 656
 657 /**
 658  * The File class handles all file operations.
 659  *
 660  * Example:
 661  * using php functions:
 662  * $fp = fopen('filename', 'wb');
 663  * fwrite($fp, '...');
 664  * fclose($fp);
 665  *
 666  * using this class:
 667  * $file = new File('filename');
 668  * $file->write('...');
 669  * $file->close();
 670  *
 671  * @author      Marcel Werk
 672  */
 673 class File {
 674         protected $resource = null;
 675         protected $filename;
 676
 677         /**
 678          * Opens a new file.
 679          *
 680          * @param       string          $filename
 681          * @param       string          $mode
 682          */
 683         public function __construct($filename, $mode = 'wb') {
 684                 $this->filename = $filename;
 685                 $this->resource = fopen($filename, $mode);
 686                 if ($this->resource === false) {
 687                         throw new SystemException('Can not open file ' . $filename);
 688                 }
 689         }
 690
 691         /**
 692          * Calls the specified function on the open file.
 693          * Do not call this function directly. Use $file->write('') instead.
 694          *
 695          * @param       string          $function
 696          * @param       array           $arguments
 697          */
 698         public function __call($function, $arguments) {
 699                 if (function_exists('f' . $function)) {
 700                         array_unshift($arguments, $this->resource);
 701                         return call_user_func_array('f' . $function, $arguments);
 702                 }
 703                 else if (function_exists($function)) {
 704                         array_unshift($arguments, $this->filename);
 705                         return call_user_func_array($function, $arguments);
 706                 }
 707                 else {
 708                         throw new SystemException('Can not call file method ' . $function);
 709                 }
 710         }
 711 }
 712
 713 /**
 714  * The File class handles all file operations on a zipped file.
 715  *
 716  * @author      Marcel Werk
 717  */
 718 class ZipFile extends File {
 719         /**
 720          * Opens a new zipped file.
 721          *
 722          * @param       string          $filename
 723          * @param       string          $mode
 724          */
 725         public function __construct($filename, $mode = 'wb') {
 726                 $this->filename = $filename;
 727                 if (!function_exists('gzopen')) {
 728                         throw new SystemException('Can not find functions of the zlib extension');
 729                 }
 730                 $this->resource = @gzopen($filename, $mode);
 731                 if ($this->resource === false) {
 732                         throw new SystemException('Can not open file ' . $filename);
 733                 }
 734         }
 735
 736         /**
 737          * Calls the specified function on the open file.
 738          *
 739          * @param       string          $function
 740          * @param       array           $arguments
 741          */
 742         public function __call($function, $arguments) {
 743                 if (function_exists('gz' . $function)) {
 744                         array_unshift($arguments, $this->resource);
 745                         return call_user_func_array('gz' . $function, $arguments);
 746                 }
 747                 else if (function_exists($function)) {
 748                         array_unshift($arguments, $this->filename);
 749                         return call_user_func_array($function, $arguments);
 750                 }
 751                 else {
 752                         throw new SystemException('Can not call method ' . $function);
 753                 }
 754         }
 755
 756         /**
 757          * Returns the filesize of the unzipped file
 758          */
 759         public function getFileSize() {
 760                 $byteBlock = 1<<14;
 761                 $eof = $byteBlock;
 762
 763                 // the correction is for zip files that are too small
 764                 // to get in the first while loop
 765                 $correction = 1;
 766                 while ($this->seek($eof) == 0) {
 767                         $eof += $byteBlock;
 768                         $correction = 0;
 769                 }
 770
 771                 while ($byteBlock > 1) {
 772                         $byteBlock >>= 1;
 773                         $eof += $byteBlock * ($this->seek($eof) ? -1 : 1);
 774                 }
 775
 776                 if ($this->seek($eof) == -1) $eof -= 1;
 777
 778                 $this->rewind();
 779                 return $eof - $correction;
 780         }
 781 }
 782
 783 // let's go
 784 // get temp file prefix
 785 if (isset($_REQUEST['tmpFilePrefix'])) {
 786         $prefix = preg_replace('/[^a-f0-9_]+/', '', $_REQUEST['tmpFilePrefix']);
 787 }
 788 else {
 789         $prefix = substr(sha1(uniqid(microtime())), 0, 8);
 790 }
 791 define('TMP_FILE_PREFIX', $prefix);
 792
 793 // try to find the temp folder
 794 define('TMP_DIR', BasicFileUtil::getInstallTempFolder());
 795
 796 /**
 797  * Reads a file resource from temp folder.
 798  *
 799  * @param       string          $key
 800  * @param       string          $directory
 801  */
 802 function readFileResource($key, $directory) {
 803         if (preg_match('~[\w\-]+\.(css|jpg|png|svg|eot|woff|ttf)~', $_GET[$key], $match)) {
 804                 switch ($match[1]) {
 805                         case 'css':
 806                                 header('Content-Type: text/css');
 807                         break;
 808
 809                         case 'jpg':
 810                                 header('Content-Type: image/jpg');
 811                         break;
 812
 813                         case 'png':
 814                                 header('Content-Type: image/png');
 815                         break;
 816
 817                         case 'svg':
 818                                 header('Content-Type: image/svg+xml');
 819                         break;
 820
 821                         case 'eot':
 822                                 header('Content-Type: application/vnd.ms-fontobject');
 823                         break;
 824
 825                         case 'woff':
 826                                 header('Content-Type: application/font-woff');
 827                         break;
 828
 829                         case 'ttf':
 830                                 header('Content-Type: application/octet-stream');
 831                         break;
 832                 }
 833
 834                 header('Expires: '.gmdate('D, d M Y H:i:s', time() + 3600).' GMT');
 835                 header('Last-Modified: Mon, 26 Jul 1997 05:00:00 GMT');
 836                 header('Cache-Control: public, max-age=3600');
 837
 838                 readfile($directory . $_GET[$key]);
 839         }
 840         exit;
 841 }
 842
 843 // show image from temp folder
 844 if (isset($_GET['showImage'])) {
 845         readFileResource('showImage', TMP_DIR . 'install/files/acp/images/');
 846 }
 847 // show icon from temp folder
 848 if (isset($_GET['showIcon'])) {
 849         readFileResource('showIcon', TMP_DIR . 'install/files/icon/');
 850 }
 851 // show css from temp folder
 852 if (isset($_GET['showCSS'])) {
 853         readFileResource('showCSS', TMP_DIR . 'install/files/acp/style/setup/');
 854 }
 855 // show fonts from temp folder
 856 if (isset($_GET['showFont'])) {
 857         readFileResource('showFont', TMP_DIR . 'install/files/font/');
 858 }
 859
 860 // check whether setup files are already unzipped
 861 if (!file_exists(TMP_DIR . 'install/files/lib/system/WCFSetup.class.php')) {
 862         // try to unzip all setup files into temp folder
 863         $tar = new Tar(SETUP_FILE);
 864         $contentList = $tar->getContentList();
 865         if (empty($contentList)) {
 866                 throw new SystemException("Can not unpack 'WCFSetup.tar.gz'. File is probably broken.");
 867         }
 868
 869         foreach ($contentList as $file) {
 870                 foreach ($neededFilesPattern as $pattern) {
 871                         if (preg_match($pattern, $file['filename'])) {
 872                                 // create directory if not exists
 873                                 $dir = TMP_DIR . dirname($file['filename']);
 874                                 if (!@is_dir($dir)) {
 875                                         @mkdir($dir, 0777, true);
 876                                         BasicFileUtil::makeWritable($dir);
 877                                 }
 878
 879                                 $tar->extract($file['index'], TMP_DIR . $file['filename']);
 880                         }
 881                 }
 882         }
 883         $tar->close();
 884
 885         // create cache folders
 886         @mkdir(TMP_DIR . 'setup/lang/cache/', 0777);
 887         BasicFileUtil::makeWritable(TMP_DIR . 'setup/lang/cache/');
 888
 889         @mkdir(TMP_DIR . 'setup/template/compiled/', 0777);
 890         BasicFileUtil::makeWritable(TMP_DIR . 'setup/template/compiled/');
 891 }
 892
 893 if (!class_exists('wcf\system\WCFSetup')) {
 894         throw new SystemException("Can not find class 'WCFSetup'");
 895 }
 896
 897 // start setup
 898 new \wcf\system\WCFSetup();