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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 /** 239 * Initializes the session 240 * 241 * Makes sure the passed session cookie is valid, invalid ones are ignored an a new session ID is issued 242 * 243 * @link http://stackoverflow.com/a/33024310/172068 244 * @link http://php.net/manual/en/session.configuration.php#ini.session.sid-length 245 */ 246 function init_session() { 247 global $conf; 248 session_name(DOKU_SESSION_NAME); 249 session_set_cookie_params( 250 DOKU_SESSION_LIFETIME, 251 DOKU_SESSION_PATH, 252 DOKU_SESSION_DOMAIN, 253 ($conf['securecookie'] && is_ssl()), 254 true 255 ); 256 257 // make sure the session cookie contains a valid session ID 258 if(isset($_COOKIE[DOKU_SESSION_NAME]) && !preg_match('/^[-,a-zA-Z0-9]{22,256}$/', $_COOKIE[DOKU_SESSION_NAME])) { 259 unset($_COOKIE[DOKU_SESSION_NAME]); 260 } 261 262 session_start(); 263 } 264 265 266 /** 267 * Checks paths from config file 268 */ 269 function init_paths(){ 270 global $conf; 271 272 $paths = [ 273 'datadir' => 'pages', 274 'olddir' => 'attic', 275 'mediadir' => 'media', 276 'mediaolddir' => 'media_attic', 277 'metadir' => 'meta', 278 'mediametadir' => 'media_meta', 279 'cachedir' => 'cache', 280 'indexdir' => 'index', 281 'lockdir' => 'locks', 282 'tmpdir' => 'tmp', 283 'logdir' => 'log', 284 ]; 285 286 foreach($paths as $c => $p) { 287 $path = empty($conf[$c]) ? $conf['savedir'].'/'.$p : $conf[$c]; 288 $conf[$c] = init_path($path); 289 if(empty($conf[$c])) 290 nice_die("The $c ('$p') at $path is not found, isn't accessible or writable. 291 You should check your config and permission settings. 292 Or maybe you want to <a href=\"install.php\">run the 293 installer</a>?"); 294 } 295 296 // path to old changelog only needed for upgrading 297 $conf['changelog_old'] = init_path( 298 (isset($conf['changelog'])) ? ($conf['changelog']) : ($conf['savedir'] . '/changes.log') 299 ); 300 if ($conf['changelog_old']=='') { unset($conf['changelog_old']); } 301 // hardcoded changelog because it is now a cache that lives in meta 302 $conf['changelog'] = $conf['metadir'].'/_dokuwiki.changes'; 303 $conf['media_changelog'] = $conf['metadir'].'/_media.changes'; 304 } 305 306 /** 307 * Load the language strings 308 * 309 * @param string $langCode language code, as passed by event handler 310 */ 311 function init_lang($langCode) { 312 //prepare language array 313 global $lang, $config_cascade; 314 $lang = array(); 315 316 //load the language files 317 require (DOKU_INC.'inc/lang/en/lang.php'); 318 foreach ($config_cascade['lang']['core'] as $config_file) { 319 if (file_exists($config_file . 'en/lang.php')) { 320 include($config_file . 'en/lang.php'); 321 } 322 } 323 324 if ($langCode && $langCode != 'en') { 325 if (file_exists(DOKU_INC."inc/lang/$langCode/lang.php")) { 326 require(DOKU_INC."inc/lang/$langCode/lang.php"); 327 } 328 foreach ($config_cascade['lang']['core'] as $config_file) { 329 if (file_exists($config_file . "$langCode/lang.php")) { 330 include($config_file . "$langCode/lang.php"); 331 } 332 } 333 } 334 } 335 336 /** 337 * Checks the existence of certain files and creates them if missing. 338 */ 339 function init_files(){ 340 global $conf; 341 342 $files = array($conf['indexdir'].'/page.idx'); 343 344 foreach($files as $file){ 345 if(!file_exists($file)){ 346 $fh = @fopen($file,'a'); 347 if($fh){ 348 fclose($fh); 349 if($conf['fperm']) chmod($file, $conf['fperm']); 350 }else{ 351 nice_die("$file is not writable. Check your permissions settings!"); 352 } 353 } 354 } 355 } 356 357 /** 358 * Returns absolute path 359 * 360 * This tries the given path first, then checks in DOKU_INC. 361 * Check for accessibility on directories as well. 362 * 363 * @author Andreas Gohr <andi@splitbrain.org> 364 * 365 * @param string $path 366 * 367 * @return bool|string 368 */ 369 function init_path($path){ 370 // check existence 371 $p = fullpath($path); 372 if(!file_exists($p)){ 373 $p = fullpath(DOKU_INC.$path); 374 if(!file_exists($p)){ 375 return ''; 376 } 377 } 378 379 // check writability 380 if(!@is_writable($p)){ 381 return ''; 382 } 383 384 // check accessability (execute bit) for directories 385 if(@is_dir($p) && !file_exists("$p/.")){ 386 return ''; 387 } 388 389 return $p; 390 } 391 392 /** 393 * Sets the internal config values fperm and dperm which, when set, 394 * will be used to change the permission of a newly created dir or 395 * file with chmod. Considers the influence of the system's umask 396 * setting the values only if needed. 397 */ 398 function init_creationmodes(){ 399 global $conf; 400 401 // Legacy support for old umask/dmask scheme 402 unset($conf['dmask']); 403 unset($conf['fmask']); 404 unset($conf['umask']); 405 unset($conf['fperm']); 406 unset($conf['dperm']); 407 408 // get system umask, fallback to 0 if none available 409 $umask = @umask(); 410 if(!$umask) $umask = 0000; 411 412 // check what is set automatically by the system on file creation 413 // and set the fperm param if it's not what we want 414 $auto_fmode = $conf['fmode'] & ~$umask; 415 if($auto_fmode != $conf['fmode']) $conf['fperm'] = $conf['fmode']; 416 417 // check what is set automatically by the system on file creation 418 // and set the dperm param if it's not what we want 419 $auto_dmode = $conf['dmode'] & ~$umask; 420 if($auto_dmode != $conf['dmode']) $conf['dperm'] = $conf['dmode']; 421 } 422 423 /** 424 * Returns the full absolute URL to the directory where 425 * DokuWiki is installed in (includes a trailing slash) 426 * 427 * !! Can not access $_SERVER values through $INPUT 428 * !! here as this function is called before $INPUT is 429 * !! initialized. 430 * 431 * @author Andreas Gohr <andi@splitbrain.org> 432 * 433 * @param null|string $abs 434 * 435 * @return string 436 */ 437 function getBaseURL($abs=null){ 438 global $conf; 439 //if canonical url enabled always return absolute 440 if(is_null($abs)) $abs = $conf['canonical']; 441 442 if(!empty($conf['basedir'])){ 443 $dir = $conf['basedir']; 444 }elseif(substr($_SERVER['SCRIPT_NAME'],-4) == '.php'){ 445 $dir = dirname($_SERVER['SCRIPT_NAME']); 446 }elseif(substr($_SERVER['PHP_SELF'],-4) == '.php'){ 447 $dir = dirname($_SERVER['PHP_SELF']); 448 }elseif($_SERVER['DOCUMENT_ROOT'] && $_SERVER['SCRIPT_FILENAME']){ 449 $dir = preg_replace ('/^'.preg_quote($_SERVER['DOCUMENT_ROOT'],'/').'/','', 450 $_SERVER['SCRIPT_FILENAME']); 451 $dir = dirname('/'.$dir); 452 }else{ 453 $dir = '.'; //probably wrong 454 } 455 456 $dir = str_replace('\\','/',$dir); // bugfix for weird WIN behaviour 457 $dir = preg_replace('#//+#','/',"/$dir/"); // ensure leading and trailing slashes 458 459 //handle script in lib/exe dir 460 $dir = preg_replace('!lib/exe/$!','',$dir); 461 462 //handle script in lib/plugins dir 463 $dir = preg_replace('!lib/plugins/.*$!','',$dir); 464 465 //finish here for relative URLs 466 if(!$abs) return $dir; 467 468 //use config if available, trim any slash from end of baseurl to avoid multiple consecutive slashes in the path 469 if(!empty($conf['baseurl'])) return rtrim($conf['baseurl'],'/').$dir; 470 471 //split hostheader into host and port 472 if(isset($_SERVER['HTTP_HOST'])){ 473 $parsed_host = parse_url('http://'.$_SERVER['HTTP_HOST']); 474 $host = isset($parsed_host['host']) ? $parsed_host['host'] : null; 475 $port = isset($parsed_host['port']) ? $parsed_host['port'] : null; 476 }elseif(isset($_SERVER['SERVER_NAME'])){ 477 $parsed_host = parse_url('http://'.$_SERVER['SERVER_NAME']); 478 $host = isset($parsed_host['host']) ? $parsed_host['host'] : null; 479 $port = isset($parsed_host['port']) ? $parsed_host['port'] : null; 480 }else{ 481 $host = php_uname('n'); 482 $port = ''; 483 } 484 485 if(is_null($port)){ 486 $port = ''; 487 } 488 489 if(!is_ssl()){ 490 $proto = 'http://'; 491 if ($port == '80') { 492 $port = ''; 493 } 494 }else{ 495 $proto = 'https://'; 496 if ($port == '443') { 497 $port = ''; 498 } 499 } 500 501 if($port !== '') $port = ':'.$port; 502 503 return $proto.$host.$port.$dir; 504 } 505 506 /** 507 * Check if accessed via HTTPS 508 * 509 * Apache leaves ,$_SERVER['HTTPS'] empty when not available, IIS sets it to 'off'. 510 * 'false' and 'disabled' are just guessing 511 * 512 * @returns bool true when SSL is active 513 */ 514 function is_ssl() { 515 // check if we are behind a reverse proxy 516 if(isset($_SERVER['HTTP_X_FORWARDED_PROTO'])) { 517 if($_SERVER['HTTP_X_FORWARDED_PROTO'] == 'https') { 518 return true; 519 } else { 520 return false; 521 } 522 } 523 if(!isset($_SERVER['HTTPS']) || 524 preg_match('/^(|off|false|disabled)$/i', $_SERVER['HTTPS'])) { 525 return false; 526 } else { 527 return true; 528 } 529 } 530 531 /** 532 * checks it is windows OS 533 * @return bool 534 */ 535 function isWindows() { 536 return (strtoupper(substr(PHP_OS, 0, 3)) === 'WIN') ? true : false; 537 } 538 539 /** 540 * print a nice message even if no styles are loaded yet. 541 * 542 * @param integer|string $msg 543 */ 544 function nice_die($msg){ 545 echo<<<EOT 546 <!DOCTYPE html> 547 <html> 548 <head><title>DokuWiki Setup Error</title></head> 549 <body style="font-family: Arial, sans-serif"> 550 <div style="width:60%; margin: auto; background-color: #fcc; 551 border: 1px solid #faa; padding: 0.5em 1em;"> 552 <h1 style="font-size: 120%">DokuWiki Setup Error</h1> 553 <p>$msg</p> 554 </div> 555 </body> 556 </html> 557 EOT; 558 if(defined('DOKU_UNITTEST')) { 559 throw new RuntimeException('nice_die: '.$msg); 560 } 561 exit(1); 562 } 563 564 /** 565 * A realpath() replacement 566 * 567 * This function behaves similar to PHP's realpath() but does not resolve 568 * symlinks or accesses upper directories 569 * 570 * @author Andreas Gohr <andi@splitbrain.org> 571 * @author <richpageau at yahoo dot co dot uk> 572 * @link http://php.net/manual/en/function.realpath.php#75992 573 * 574 * @param string $path 575 * @param bool $exists 576 * 577 * @return bool|string 578 */ 579 function fullpath($path,$exists=false){ 580 static $run = 0; 581 $root = ''; 582 $iswin = (strtoupper(substr(PHP_OS, 0, 3)) === 'WIN' || !empty($GLOBALS['DOKU_UNITTEST_ASSUME_WINDOWS'])); 583 584 // find the (indestructable) root of the path - keeps windows stuff intact 585 if($path[0] == '/'){ 586 $root = '/'; 587 }elseif($iswin){ 588 // match drive letter and UNC paths 589 if(preg_match('!^([a-zA-z]:)(.*)!',$path,$match)){ 590 $root = $match[1].'/'; 591 $path = $match[2]; 592 }else if(preg_match('!^(\\\\\\\\[^\\\\/]+\\\\[^\\\\/]+[\\\\/])(.*)!',$path,$match)){ 593 $root = $match[1]; 594 $path = $match[2]; 595 } 596 } 597 $path = str_replace('\\','/',$path); 598 599 // if the given path wasn't absolute already, prepend the script path and retry 600 if(!$root){ 601 $base = dirname($_SERVER['SCRIPT_FILENAME']); 602 $path = $base.'/'.$path; 603 if($run == 0){ // avoid endless recursion when base isn't absolute for some reason 604 $run++; 605 return fullpath($path,$exists); 606 } 607 } 608 $run = 0; 609 610 // canonicalize 611 $path=explode('/', $path); 612 $newpath=array(); 613 foreach($path as $p) { 614 if ($p === '' || $p === '.') continue; 615 if ($p==='..') { 616 array_pop($newpath); 617 continue; 618 } 619 array_push($newpath, $p); 620 } 621 $finalpath = $root.implode('/', $newpath); 622 623 // check for existence when needed (except when unit testing) 624 if($exists && !defined('DOKU_UNITTEST') && !file_exists($finalpath)) { 625 return false; 626 } 627 return $finalpath; 628 } 629
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