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PHP Cross Reference of DokuWiki |
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1 <?php 2 /** 3 * Initialize some defaults needed for DokuWiki 4 */ 5 6 use dokuwiki\Extension\Event; 7 use dokuwiki\Extension\EventHandler; 8 9 /** 10 * timing Dokuwiki execution 11 * 12 * @param integer $start 13 * 14 * @return mixed 15 */ 16 function delta_time($start=0) { 17 return microtime(true)-((float)$start); 18 } 19 define('DOKU_START_TIME', delta_time()); 20 21 global $config_cascade; 22 $config_cascade = array(); 23 24 // if available load a preload config file 25 $preload = fullpath(dirname(__FILE__)).'/preload.php'; 26 if (file_exists($preload)) include($preload); 27 28 // define the include path 29 if(!defined('DOKU_INC')) define('DOKU_INC',fullpath(dirname(__FILE__).'/../').'/'); 30 31 // define Plugin dir 32 if(!defined('DOKU_PLUGIN')) define('DOKU_PLUGIN',DOKU_INC.'lib/plugins/'); 33 34 // define config path (packagers may want to change this to /etc/dokuwiki/) 35 if(!defined('DOKU_CONF')) define('DOKU_CONF',DOKU_INC.'conf/'); 36 37 // check for error reporting override or set error reporting to sane values 38 if (!defined('DOKU_E_LEVEL') && file_exists(DOKU_CONF.'report_e_all')) { 39 define('DOKU_E_LEVEL', E_ALL); 40 } 41 if (!defined('DOKU_E_LEVEL')) { 42 error_reporting(E_ALL & ~E_NOTICE & ~E_DEPRECATED & ~E_STRICT); 43 } else { 44 error_reporting(DOKU_E_LEVEL); 45 } 46 47 // avoid caching issues #1594 48 header('Vary: Cookie'); 49 50 // init memory caches 51 global $cache_revinfo; 52 $cache_revinfo = array(); 53 global $cache_wikifn; 54 $cache_wikifn = array(); 55 global $cache_cleanid; 56 $cache_cleanid = array(); 57 global $cache_authname; 58 $cache_authname = array(); 59 global $cache_metadata; 60 $cache_metadata = array(); 61 62 // always include 'inc/config_cascade.php' 63 // previously in preload.php set fields of $config_cascade will be merged with the defaults 64 include (DOKU_INC.'inc/config_cascade.php'); 65 66 //prepare config array() 67 global $conf; 68 $conf = array(); 69 70 // load the global config file(s) 71 foreach (array('default','local','protected') as $config_group) { 72 if (empty($config_cascade['main'][$config_group])) continue; 73 foreach ($config_cascade['main'][$config_group] as $config_file) { 74 if (file_exists($config_file)) { 75 include($config_file); 76 } 77 } 78 } 79 80 //prepare license array() 81 global $license; 82 $license = array(); 83 84 // load the license file(s) 85 foreach (array('default','local') as $config_group) { 86 if (empty($config_cascade['license'][$config_group])) continue; 87 foreach ($config_cascade['license'][$config_group] as $config_file) { 88 if(file_exists($config_file)){ 89 include($config_file); 90 } 91 } 92 } 93 94 // set timezone (as in pre 5.3.0 days) 95 date_default_timezone_set(@date_default_timezone_get()); 96 97 // define baseURL 98 if(!defined('DOKU_REL')) define('DOKU_REL',getBaseURL(false)); 99 if(!defined('DOKU_URL')) define('DOKU_URL',getBaseURL(true)); 100 if(!defined('DOKU_BASE')){ 101 if($conf['canonical']){ 102 define('DOKU_BASE',DOKU_URL); 103 }else{ 104 define('DOKU_BASE',DOKU_REL); 105 } 106 } 107 108 // define whitespace 109 if(!defined('NL')) define ('NL',"\n"); 110 if(!defined('DOKU_LF')) define ('DOKU_LF',"\n"); 111 if(!defined('DOKU_TAB')) define ('DOKU_TAB',"\t"); 112 113 // define cookie and session id, append server port when securecookie is configured FS#1664 114 if (!defined('DOKU_COOKIE')) { 115 $serverPort = isset($_SERVER['SERVER_PORT']) ? $_SERVER['SERVER_PORT'] : ''; 116 define('DOKU_COOKIE', 'DW' . md5(DOKU_REL . (($conf['securecookie']) ? $serverPort : ''))); 117 unset($serverPort); 118 } 119 120 // define main script 121 if(!defined('DOKU_SCRIPT')) define('DOKU_SCRIPT','doku.php'); 122 123 if(!defined('DOKU_TPL')) { 124 /** 125 * @deprecated 2012-10-13 replaced by more dynamic method 126 * @see tpl_basedir() 127 */ 128 define('DOKU_TPL', DOKU_BASE.'lib/tpl/'.$conf['template'].'/'); 129 } 130 131 if(!defined('DOKU_TPLINC')) { 132 /** 133 * @deprecated 2012-10-13 replaced by more dynamic method 134 * @see tpl_incdir() 135 */ 136 define('DOKU_TPLINC', DOKU_INC.'lib/tpl/'.$conf['template'].'/'); 137 } 138 139 // make session rewrites XHTML compliant 140 @ini_set('arg_separator.output', '&'); 141 142 // make sure global zlib does not interfere FS#1132 143 @ini_set('zlib.output_compression', 'off'); 144 145 // increase PCRE backtrack limit 146 @ini_set('pcre.backtrack_limit', '20971520'); 147 148 // enable gzip compression if supported 149 $httpAcceptEncoding = isset($_SERVER['HTTP_ACCEPT_ENCODING']) ? $_SERVER['HTTP_ACCEPT_ENCODING'] : ''; 150 $conf['gzip_output'] &= (strpos($httpAcceptEncoding, 'gzip') !== false); 151 global $ACT; 152 if ($conf['gzip_output'] && 153 !defined('DOKU_DISABLE_GZIP_OUTPUT') && 154 function_exists('ob_gzhandler') && 155 // Disable compression when a (compressed) sitemap might be delivered 156 // See https://bugs.dokuwiki.org/index.php?do=details&task_id=2576 157 $ACT != 'sitemap') { 158 ob_start('ob_gzhandler'); 159 } 160 161 // init session 162 if(!headers_sent() && !defined('NOSESSION')) { 163 if(!defined('DOKU_SESSION_NAME')) define ('DOKU_SESSION_NAME', "DokuWiki"); 164 if(!defined('DOKU_SESSION_LIFETIME')) define ('DOKU_SESSION_LIFETIME', 0); 165 if(!defined('DOKU_SESSION_PATH')) { 166 $cookieDir = empty($conf['cookiedir']) ? DOKU_REL : $conf['cookiedir']; 167 define ('DOKU_SESSION_PATH', $cookieDir); 168 } 169 if(!defined('DOKU_SESSION_DOMAIN')) define ('DOKU_SESSION_DOMAIN', ''); 170 171 // start the session 172 init_session(); 173 174 // load left over messages 175 if(isset($_SESSION[DOKU_COOKIE]['msg'])) { 176 $MSG = $_SESSION[DOKU_COOKIE]['msg']; 177 unset($_SESSION[DOKU_COOKIE]['msg']); 178 } 179 } 180 181 // don't let cookies ever interfere with request vars 182 $_REQUEST = array_merge($_GET,$_POST); 183 184 // we don't want a purge URL to be digged 185 if(isset($_REQUEST['purge']) && !empty($_SERVER['HTTP_REFERER'])) unset($_REQUEST['purge']); 186 187 // precalculate file creation modes 188 init_creationmodes(); 189 190 // make real paths and check them 191 init_paths(); 192 init_files(); 193 194 // setup plugin controller class (can be overwritten in preload.php) 195 global $plugin_controller_class, $plugin_controller; 196 if (empty($plugin_controller_class)) $plugin_controller_class = dokuwiki\Extension\PluginController::class; 197 198 // load libraries 199 require_once (DOKU_INC.'vendor/autoload.php'); 200 require_once (DOKU_INC.'inc/load.php'); 201 202 // from now on everything is an exception 203 \dokuwiki\ErrorHandler::register(); 204 205 // disable gzip if not available 206 define('DOKU_HAS_BZIP', function_exists('bzopen')); 207 define('DOKU_HAS_GZIP', function_exists('gzopen')); 208 if($conf['compression'] == 'bz2' && !DOKU_HAS_BZIP) { 209 $conf['compression'] = 'gz'; 210 } 211 if($conf['compression'] == 'gz' && !DOKU_HAS_GZIP) { 212 $conf['compression'] = 0; 213 } 214 215 // input handle class 216 global $INPUT; 217 $INPUT = new \dokuwiki\Input\Input(); 218 219 // initialize plugin controller 220 $plugin_controller = new $plugin_controller_class(); 221 222 // initialize the event handler 223 global $EVENT_HANDLER; 224 $EVENT_HANDLER = new EventHandler(); 225 226 $local = $conf['lang']; 227 Event::createAndTrigger('INIT_LANG_LOAD', $local, 'init_lang', true); 228 229 230 // setup authentication system 231 if (!defined('NOSESSION')) { 232 auth_setup(); 233 } 234 235 // setup mail system 236 mail_setup(); 237 238 $nil = null; 239 Event::createAndTrigger('DOKUWIKI_INIT_DONE', $nil, null, false); 240 241 /** 242 * Initializes the session 243 * 244 * Makes sure the passed session cookie is valid, invalid ones are ignored an a new session ID is issued 245 * 246 * @link http://stackoverflow.com/a/33024310/172068 247 * @link http://php.net/manual/en/session.configuration.php#ini.session.sid-length 248 */ 249 function init_session() { 250 global $conf; 251 session_name(DOKU_SESSION_NAME); 252 session_set_cookie_params( 253 DOKU_SESSION_LIFETIME, 254 DOKU_SESSION_PATH, 255 DOKU_SESSION_DOMAIN, 256 ($conf['securecookie'] && is_ssl()), 257 true 258 ); 259 260 // make sure the session cookie contains a valid session ID 261 if(isset($_COOKIE[DOKU_SESSION_NAME]) && !preg_match('/^[-,a-zA-Z0-9]{22,256}$/', $_COOKIE[DOKU_SESSION_NAME])) { 262 unset($_COOKIE[DOKU_SESSION_NAME]); 263 } 264 265 session_start(); 266 } 267 268 269 /** 270 * Checks paths from config file 271 */ 272 function init_paths(){ 273 global $conf; 274 275 $paths = [ 276 'datadir' => 'pages', 277 'olddir' => 'attic', 278 'mediadir' => 'media', 279 'mediaolddir' => 'media_attic', 280 'metadir' => 'meta', 281 'mediametadir' => 'media_meta', 282 'cachedir' => 'cache', 283 'indexdir' => 'index', 284 'lockdir' => 'locks', 285 'tmpdir' => 'tmp', 286 'logdir' => 'log', 287 ]; 288 289 foreach($paths as $c => $p) { 290 $path = empty($conf[$c]) ? $conf['savedir'].'/'.$p : $conf[$c]; 291 $conf[$c] = init_path($path); 292 if(empty($conf[$c])) { 293 $path = fullpath($path); 294 nice_die("The $c ('$p') at $path is not found, isn't accessible or writable. 295 You should check your config and permission settings. 296 Or maybe you want to <a href=\"install.php\">run the 297 installer</a>?"); 298 } 299 } 300 301 // path to old changelog only needed for upgrading 302 $conf['changelog_old'] = init_path( 303 (isset($conf['changelog'])) ? ($conf['changelog']) : ($conf['savedir'] . '/changes.log') 304 ); 305 if ($conf['changelog_old']=='') { unset($conf['changelog_old']); } 306 // hardcoded changelog because it is now a cache that lives in meta 307 $conf['changelog'] = $conf['metadir'].'/_dokuwiki.changes'; 308 $conf['media_changelog'] = $conf['metadir'].'/_media.changes'; 309 } 310 311 /** 312 * Load the language strings 313 * 314 * @param string $langCode language code, as passed by event handler 315 */ 316 function init_lang($langCode) { 317 //prepare language array 318 global $lang, $config_cascade; 319 $lang = array(); 320 321 //load the language files 322 require (DOKU_INC.'inc/lang/en/lang.php'); 323 foreach ($config_cascade['lang']['core'] as $config_file) { 324 if (file_exists($config_file . 'en/lang.php')) { 325 include($config_file . 'en/lang.php'); 326 } 327 } 328 329 if ($langCode && $langCode != 'en') { 330 if (file_exists(DOKU_INC."inc/lang/$langCode/lang.php")) { 331 require(DOKU_INC."inc/lang/$langCode/lang.php"); 332 } 333 foreach ($config_cascade['lang']['core'] as $config_file) { 334 if (file_exists($config_file . "$langCode/lang.php")) { 335 include($config_file . "$langCode/lang.php"); 336 } 337 } 338 } 339 } 340 341 /** 342 * Checks the existence of certain files and creates them if missing. 343 */ 344 function init_files(){ 345 global $conf; 346 347 $files = array($conf['indexdir'].'/page.idx'); 348 349 foreach($files as $file){ 350 if(!file_exists($file)){ 351 $fh = @fopen($file,'a'); 352 if($fh){ 353 fclose($fh); 354 if($conf['fperm']) chmod($file, $conf['fperm']); 355 }else{ 356 nice_die("$file is not writable. Check your permissions settings!"); 357 } 358 } 359 } 360 } 361 362 /** 363 * Returns absolute path 364 * 365 * This tries the given path first, then checks in DOKU_INC. 366 * Check for accessibility on directories as well. 367 * 368 * @author Andreas Gohr <andi@splitbrain.org> 369 * 370 * @param string $path 371 * 372 * @return bool|string 373 */ 374 function init_path($path){ 375 // check existence 376 $p = fullpath($path); 377 if(!file_exists($p)){ 378 $p = fullpath(DOKU_INC.$path); 379 if(!file_exists($p)){ 380 return ''; 381 } 382 } 383 384 // check writability 385 if(!@is_writable($p)){ 386 return ''; 387 } 388 389 // check accessability (execute bit) for directories 390 if(@is_dir($p) && !file_exists("$p/.")){ 391 return ''; 392 } 393 394 return $p; 395 } 396 397 /** 398 * Sets the internal config values fperm and dperm which, when set, 399 * will be used to change the permission of a newly created dir or 400 * file with chmod. Considers the influence of the system's umask 401 * setting the values only if needed. 402 */ 403 function init_creationmodes(){ 404 global $conf; 405 406 // Legacy support for old umask/dmask scheme 407 unset($conf['dmask']); 408 unset($conf['fmask']); 409 unset($conf['umask']); 410 411 $conf['fperm'] = false; 412 $conf['dperm'] = false; 413 414 // get system umask, fallback to 0 if none available 415 $umask = @umask(); 416 if(!$umask) $umask = 0000; 417 418 // check what is set automatically by the system on file creation 419 // and set the fperm param if it's not what we want 420 $auto_fmode = 0666 & ~$umask; 421 if($auto_fmode != $conf['fmode']) $conf['fperm'] = $conf['fmode']; 422 423 // check what is set automatically by the system on directory creation 424 // and set the dperm param if it's not what we want. 425 $auto_dmode = 0777 & ~$umask; 426 if($auto_dmode != $conf['dmode']) $conf['dperm'] = $conf['dmode']; 427 } 428 429 /** 430 * Returns the full absolute URL to the directory where 431 * DokuWiki is installed in (includes a trailing slash) 432 * 433 * !! Can not access $_SERVER values through $INPUT 434 * !! here as this function is called before $INPUT is 435 * !! initialized. 436 * 437 * @author Andreas Gohr <andi@splitbrain.org> 438 * 439 * @param null|string $abs 440 * 441 * @return string 442 */ 443 function getBaseURL($abs=null){ 444 global $conf; 445 //if canonical url enabled always return absolute 446 if(is_null($abs)) $abs = $conf['canonical']; 447 448 if(!empty($conf['basedir'])){ 449 $dir = $conf['basedir']; 450 }elseif(substr($_SERVER['SCRIPT_NAME'],-4) == '.php'){ 451 $dir = dirname($_SERVER['SCRIPT_NAME']); 452 }elseif(substr($_SERVER['PHP_SELF'],-4) == '.php'){ 453 $dir = dirname($_SERVER['PHP_SELF']); 454 }elseif($_SERVER['DOCUMENT_ROOT'] && $_SERVER['SCRIPT_FILENAME']){ 455 $dir = preg_replace ('/^'.preg_quote($_SERVER['DOCUMENT_ROOT'],'/').'/','', 456 $_SERVER['SCRIPT_FILENAME']); 457 $dir = dirname('/'.$dir); 458 }else{ 459 $dir = '.'; //probably wrong 460 } 461 462 $dir = str_replace('\\','/',$dir); // bugfix for weird WIN behaviour 463 $dir = preg_replace('#//+#','/',"/$dir/"); // ensure leading and trailing slashes 464 465 //handle script in lib/exe dir 466 $dir = preg_replace('!lib/exe/$!','',$dir); 467 468 //handle script in lib/plugins dir 469 $dir = preg_replace('!lib/plugins/.*$!','',$dir); 470 471 //finish here for relative URLs 472 if(!$abs) return $dir; 473 474 //use config if available, trim any slash from end of baseurl to avoid multiple consecutive slashes in the path 475 if(!empty($conf['baseurl'])) return rtrim($conf['baseurl'],'/').$dir; 476 477 //split hostheader into host and port 478 if(isset($_SERVER['HTTP_HOST'])){ 479 $parsed_host = parse_url('http://'.$_SERVER['HTTP_HOST']); 480 $host = isset($parsed_host['host']) ? $parsed_host['host'] : null; 481 $port = isset($parsed_host['port']) ? $parsed_host['port'] : null; 482 }elseif(isset($_SERVER['SERVER_NAME'])){ 483 $parsed_host = parse_url('http://'.$_SERVER['SERVER_NAME']); 484 $host = isset($parsed_host['host']) ? $parsed_host['host'] : null; 485 $port = isset($parsed_host['port']) ? $parsed_host['port'] : null; 486 }else{ 487 $host = php_uname('n'); 488 $port = ''; 489 } 490 491 if(is_null($port)){ 492 $port = ''; 493 } 494 495 if(!is_ssl()){ 496 $proto = 'http://'; 497 if ($port == '80') { 498 $port = ''; 499 } 500 }else{ 501 $proto = 'https://'; 502 if ($port == '443') { 503 $port = ''; 504 } 505 } 506 507 if($port !== '') $port = ':'.$port; 508 509 return $proto.$host.$port.$dir; 510 } 511 512 /** 513 * Check if accessed via HTTPS 514 * 515 * Apache leaves ,$_SERVER['HTTPS'] empty when not available, IIS sets it to 'off'. 516 * 'false' and 'disabled' are just guessing 517 * 518 * @returns bool true when SSL is active 519 */ 520 function is_ssl() { 521 // check if we are behind a reverse proxy 522 if(isset($_SERVER['HTTP_X_FORWARDED_PROTO'])) { 523 if($_SERVER['HTTP_X_FORWARDED_PROTO'] == 'https') { 524 return true; 525 } else { 526 return false; 527 } 528 } 529 if(!isset($_SERVER['HTTPS']) || 530 preg_match('/^(|off|false|disabled)$/i', $_SERVER['HTTPS'])) { 531 return false; 532 } else { 533 return true; 534 } 535 } 536 537 /** 538 * checks it is windows OS 539 * @return bool 540 */ 541 function isWindows() { 542 return (strtoupper(substr(PHP_OS, 0, 3)) === 'WIN') ? true : false; 543 } 544 545 /** 546 * print a nice message even if no styles are loaded yet. 547 * 548 * @param integer|string $msg 549 */ 550 function nice_die($msg){ 551 echo<<<EOT 552 <!DOCTYPE html> 553 <html> 554 <head><title>DokuWiki Setup Error</title></head> 555 <body style="font-family: Arial, sans-serif"> 556 <div style="width:60%; margin: auto; background-color: #fcc; 557 border: 1px solid #faa; padding: 0.5em 1em;"> 558 <h1 style="font-size: 120%">DokuWiki Setup Error</h1> 559 <p>$msg</p> 560 </div> 561 </body> 562 </html> 563 EOT; 564 if(defined('DOKU_UNITTEST')) { 565 throw new RuntimeException('nice_die: '.$msg); 566 } 567 exit(1); 568 } 569 570 /** 571 * A realpath() replacement 572 * 573 * This function behaves similar to PHP's realpath() but does not resolve 574 * symlinks or accesses upper directories 575 * 576 * @author Andreas Gohr <andi@splitbrain.org> 577 * @author <richpageau at yahoo dot co dot uk> 578 * @link http://php.net/manual/en/function.realpath.php#75992 579 * 580 * @param string $path 581 * @param bool $exists 582 * 583 * @return bool|string 584 */ 585 function fullpath($path,$exists=false){ 586 static $run = 0; 587 $root = ''; 588 $iswin = (strtoupper(substr(PHP_OS, 0, 3)) === 'WIN' || !empty($GLOBALS['DOKU_UNITTEST_ASSUME_WINDOWS'])); 589 590 // find the (indestructable) root of the path - keeps windows stuff intact 591 if($path[0] == '/'){ 592 $root = '/'; 593 }elseif($iswin){ 594 // match drive letter and UNC paths 595 if(preg_match('!^([a-zA-z]:)(.*)!',$path,$match)){ 596 $root = $match[1].'/'; 597 $path = $match[2]; 598 }else if(preg_match('!^(\\\\\\\\[^\\\\/]+\\\\[^\\\\/]+[\\\\/])(.*)!',$path,$match)){ 599 $root = $match[1]; 600 $path = $match[2]; 601 } 602 } 603 $path = str_replace('\\','/',$path); 604 605 // if the given path wasn't absolute already, prepend the script path and retry 606 if(!$root){ 607 $base = dirname($_SERVER['SCRIPT_FILENAME']); 608 $path = $base.'/'.$path; 609 if($run == 0){ // avoid endless recursion when base isn't absolute for some reason 610 $run++; 611 return fullpath($path,$exists); 612 } 613 } 614 $run = 0; 615 616 // canonicalize 617 $path=explode('/', $path); 618 $newpath=array(); 619 foreach($path as $p) { 620 if ($p === '' || $p === '.') continue; 621 if ($p==='..') { 622 array_pop($newpath); 623 continue; 624 } 625 array_push($newpath, $p); 626 } 627 $finalpath = $root.implode('/', $newpath); 628 629 // check for existence when needed (except when unit testing) 630 if($exists && !defined('DOKU_UNITTEST') && !file_exists($finalpath)) { 631 return false; 632 } 633 return $finalpath; 634 } 635
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