| 1 | <?php |
| 2 | /*************************************************************************** |
| 3 | * Copyright (C) 2003-2010 Polytechnique.org * |
| 4 | * http://opensource.polytechnique.org/ * |
| 5 | * * |
| 6 | * This program is free software; you can redistribute it and/or modify * |
| 7 | * it under the terms of the GNU General Public License as published by * |
| 8 | * the Free Software Foundation; either version 2 of the License, or * |
| 9 | * (at your option) any later version. * |
| 10 | * * |
| 11 | * This program is distributed in the hope that it will be useful, * |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of * |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * |
| 14 | * GNU General Public License for more details. * |
| 15 | * * |
| 16 | * You should have received a copy of the GNU General Public License * |
| 17 | * along with this program; if not, write to the Free Software * |
| 18 | * Foundation, Inc., * |
| 19 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * |
| 20 | ***************************************************************************/ |
| 21 | |
| 22 | define('PL_DO_AUTH', 300); |
| 23 | define('PL_FORBIDDEN', 403); |
| 24 | define('PL_NOT_FOUND', 404); |
| 25 | define('PL_WIKI', 500); |
| 26 | |
| 27 | abstract class PlHook |
| 28 | { |
| 29 | protected $auth; |
| 30 | protected $perms; |
| 31 | protected $type; |
| 32 | |
| 33 | protected function __construct($auth = AUTH_PUBLIC, $perms = 'user', $type = DO_AUTH) |
| 34 | { |
| 35 | $this->auth = $auth; |
| 36 | $this->perms = $perms; |
| 37 | $this->type = $type; |
| 38 | } |
| 39 | |
| 40 | public function needAuth() |
| 41 | { |
| 42 | return $this->auth > S::i('auth', AUTH_PUBLIC); |
| 43 | } |
| 44 | |
| 45 | public function checkPerms() |
| 46 | { |
| 47 | if (!$this->perms || $this->auth == AUTH_PUBLIC) { // No perms, no check |
| 48 | return true; |
| 49 | } |
| 50 | $s_perms = S::v('perms'); |
| 51 | return $s_perms->hasFlagCombination($this->perms); |
| 52 | } |
| 53 | |
| 54 | public function hasType($type) |
| 55 | { |
| 56 | return ($this->type & $type) == $type; |
| 57 | } |
| 58 | |
| 59 | abstract protected function run(PlPage &$page, array $args); |
| 60 | |
| 61 | public function call(PlPage &$page, array $args) |
| 62 | { |
| 63 | global $globals, $session, $platal; |
| 64 | if ($this->needAuth()) { |
| 65 | if ($this->hasType(DO_AUTH)) { |
| 66 | if (!$session->start($this->auth)) { |
| 67 | $platal->force_login($page); |
| 68 | } |
| 69 | } else { |
| 70 | return PL_FORBIDDEN; |
| 71 | } |
| 72 | } |
| 73 | if (!$this->checkPerms()) { |
| 74 | if (!Platal::notAllowed()) { |
| 75 | return PL_FORBIDDEN; |
| 76 | } |
| 77 | } |
| 78 | return $this->run($page, $args); |
| 79 | } |
| 80 | } |
| 81 | |
| 82 | class PlStdHook extends PlHook |
| 83 | { |
| 84 | private $hook; |
| 85 | |
| 86 | public function __construct($callback, $auth = AUTH_PUBLIC, $perms = 'user', $type = DO_AUTH) |
| 87 | { |
| 88 | parent::__construct($auth, $perms, $type); |
| 89 | $this->hook = $callback; |
| 90 | } |
| 91 | |
| 92 | protected function run(PlPage &$page, array $args) |
| 93 | { |
| 94 | global $session, $platal; |
| 95 | |
| 96 | $args[0] = $page; |
| 97 | $val = call_user_func_array($this->hook, $args); |
| 98 | if ($val == PL_DO_AUTH) { |
| 99 | if (!$session->start($session->loggedLevel())) { |
| 100 | $platal->force_login($page); |
| 101 | } |
| 102 | $val = call_user_func_array($this->hook, $args); |
| 103 | } |
| 104 | return $val; |
| 105 | } |
| 106 | } |
| 107 | |
| 108 | class PlWikiHook extends PlHook |
| 109 | { |
| 110 | public function __construct($auth = AUTH_PUBLIC, $perms = 'user', $type = DO_AUTH) |
| 111 | { |
| 112 | parent::__construct($auth, $perms, $type); |
| 113 | } |
| 114 | |
| 115 | protected function run(PlPage &$page, array $args) |
| 116 | { |
| 117 | return PL_WIKI; |
| 118 | } |
| 119 | } |
| 120 | |
| 121 | class PlHookTree |
| 122 | { |
| 123 | public $hook = null; |
| 124 | public $aliased = null; |
| 125 | public $children = array(); |
| 126 | |
| 127 | public function addChild(array $path, PlHook $hook) |
| 128 | { |
| 129 | global $platal; |
| 130 | $next = array_shift($path); |
| 131 | $alias = null; |
| 132 | if ($next && $next{0} == '%') { |
| 133 | $alias = $next; |
| 134 | $next = $platal->hook_map(substr($next, 1)); |
| 135 | } |
| 136 | if (!$next) { |
| 137 | return; |
| 138 | } |
| 139 | @$child =& $this->children[$next]; |
| 140 | if (!$child) { |
| 141 | $child = new PlHookTree(); |
| 142 | $this->children[$next] =& $child; |
| 143 | $child->aliased = $alias; |
| 144 | } |
| 145 | if (empty($path)) { |
| 146 | $child->hook = $hook; |
| 147 | } else { |
| 148 | $child->addChild($path, $hook); |
| 149 | } |
| 150 | } |
| 151 | |
| 152 | private function findChildAux(array $remain, array $matched, array $aliased) |
| 153 | { |
| 154 | $next = @$remain[0]; |
| 155 | if ($this->aliased) { |
| 156 | $aliased = $matched; |
| 157 | } |
| 158 | if (!empty($next)) { |
| 159 | $child = @$this->children[$next]; |
| 160 | if ($child) { |
| 161 | array_shift($remain); |
| 162 | $matched[] = $next; |
| 163 | return $child->findChildAux($remain, $matched, $aliased); |
| 164 | } |
| 165 | } |
| 166 | return array($this->hook, $matched, $remain, $aliased); |
| 167 | } |
| 168 | |
| 169 | public function findChild(array $path) |
| 170 | { |
| 171 | return $this->findChildAux($path, array(), array()); |
| 172 | } |
| 173 | |
| 174 | private function findNearestChildAux(array $remain, array $matched, array $aliased) |
| 175 | { |
| 176 | $next = @$remain[0]; |
| 177 | if ($this->aliased) { |
| 178 | $aliased = $matched; |
| 179 | } |
| 180 | if (!empty($next)) { |
| 181 | $child = @$this->children[$next]; |
| 182 | if (!$child) { |
| 183 | $nearest_lev = 50; |
| 184 | $nearest_sdx = 50; |
| 185 | $match = null; |
| 186 | foreach ($this->children as $path=>$hook) { |
| 187 | $lev = levenshtein($next, $path); |
| 188 | if ($lev <= $nearest_lev |
| 189 | && ($lev < strlen($next) / 2 || strpos($next, $path) !== false |
| 190 | || strpos($path, $next) !== false)) { |
| 191 | $sdx = levenshtein(soundex($next), soundex($path)); |
| 192 | if ($lev == $nearest_lev || $sdx < $nearest_sdx) { |
| 193 | $child = $hook; |
| 194 | $nearest_lev = $lev; |
| 195 | $nearest_sdx = $sdx; |
| 196 | $match = $path; |
| 197 | } |
| 198 | } |
| 199 | } |
| 200 | $next = $match; |
| 201 | } |
| 202 | if ($child) { |
| 203 | array_shift($remain); |
| 204 | $matched[] = $next; |
| 205 | return $child->findNearestChildAux($remain, $matched, $aliased); |
| 206 | } |
| 207 | if (($pos = strpos($next, '.php')) !== false) { |
| 208 | $remain[0] = substr($next, 0, $pos); |
| 209 | return $this->findNearestChildAux($remain, $matched, $aliased); |
| 210 | } |
| 211 | } |
| 212 | return array($this->hook, $matched, $remain, $aliased); |
| 213 | } |
| 214 | |
| 215 | public function findNearestChild(array $path) |
| 216 | { |
| 217 | return $this->findNearestChildAux($path, array(), array()); |
| 218 | } |
| 219 | } |
| 220 | |
| 221 | |
| 222 | abstract class Platal |
| 223 | { |
| 224 | private $mods; |
| 225 | private $hooks; |
| 226 | |
| 227 | protected $https; |
| 228 | |
| 229 | public $ns; |
| 230 | public $path; |
| 231 | public $argv; |
| 232 | |
| 233 | static private $_page = null; |
| 234 | |
| 235 | public function __construct() |
| 236 | { |
| 237 | global $platal, $session, $globals; |
| 238 | $platal = $this; |
| 239 | |
| 240 | /* Assign globals first, then call init: init must be used for operations |
| 241 | * that requires access to the content of $globals (e.g. XDB requires |
| 242 | * $globals to be assigned. |
| 243 | */ |
| 244 | $globals = $this->buildGlobals(); |
| 245 | $globals->init(); |
| 246 | |
| 247 | /* Get the current session: assign first, then activate the session. |
| 248 | */ |
| 249 | $session = $this->buildSession(); |
| 250 | if (!$session->startAvailableAuth()) { |
| 251 | Platal::page()->trigError("Données d'authentification invalides."); |
| 252 | } |
| 253 | |
| 254 | $modules = func_get_args(); |
| 255 | if (isset($modules[0]) && is_array($modules[0])) { |
| 256 | $modules = $modules[0]; |
| 257 | } |
| 258 | $this->path = trim(Get::_get('n', null), '/'); |
| 259 | |
| 260 | $this->mods = array(); |
| 261 | $this->hooks = new PlHookTree(); |
| 262 | |
| 263 | array_unshift($modules, 'core'); |
| 264 | foreach ($modules as $module) { |
| 265 | $module = strtolower($module); |
| 266 | $this->mods[$module] = $m = PLModule::factory($module); |
| 267 | $hooks = $m->handlers(); |
| 268 | foreach ($hooks as $path=>$hook) { |
| 269 | $this->hooks->addChild(split('/', $path), $hook); |
| 270 | } |
| 271 | } |
| 272 | |
| 273 | if ($globals->mode == '') { |
| 274 | pl_redirect('index.html'); |
| 275 | } |
| 276 | } |
| 277 | |
| 278 | public function pl_self($n = null) |
| 279 | { |
| 280 | if (is_null($n)) |
| 281 | return $this->path; |
| 282 | |
| 283 | if ($n >= 0) |
| 284 | return join('/', array_slice($this->argv, 0, $n + 1)); |
| 285 | |
| 286 | if ($n <= -count($this->argv)) |
| 287 | return $this->argv[0]; |
| 288 | |
| 289 | return join('/', array_slice($this->argv, 0, $n)); |
| 290 | } |
| 291 | |
| 292 | public static function wiki_hook($auth = AUTH_PUBLIC, $perms = 'user', $type = DO_AUTH) |
| 293 | { |
| 294 | return new PlWikiHook($auth, $perms, $type); |
| 295 | } |
| 296 | |
| 297 | public function hook_map($name) |
| 298 | { |
| 299 | return null; |
| 300 | } |
| 301 | |
| 302 | protected function find_hook() |
| 303 | { |
| 304 | $p = split('/', $this->path); |
| 305 | list($hook, $matched, $remain, $aliased) = $this->hooks->findChild($p); |
| 306 | if (empty($hook)) { |
| 307 | return null; |
| 308 | } |
| 309 | $this->argv = $remain; |
| 310 | array_unshift($this->argv, implode('/', $matched)); |
| 311 | if (!empty($aliased)) { |
| 312 | $this->ns = implode('/', $aliased) . '/'; |
| 313 | } |
| 314 | $this->https = !$hook->hasType(NO_HTTPS); |
| 315 | return $hook; |
| 316 | } |
| 317 | |
| 318 | public function near_hook() |
| 319 | { |
| 320 | $p = split('/', $this->path); |
| 321 | list($hook, $matched, $remain, $aliased) = $this->hooks->findNearestChild($p); |
| 322 | if (empty($hook)) { |
| 323 | return null; |
| 324 | } |
| 325 | $url = implode('/', $matched); |
| 326 | if (!empty($remain)) { |
| 327 | $url .= '/' . implode('/', $remain); |
| 328 | } |
| 329 | if ($url == $this->path || levenshtein($url, $this->path) > strlen($url) / 3 |
| 330 | || !$hook->checkPerms()) { |
| 331 | return null; |
| 332 | } |
| 333 | return $url; |
| 334 | } |
| 335 | |
| 336 | private function call_hook(PlPage &$page) |
| 337 | { |
| 338 | $hook = $this->find_hook(); |
| 339 | if (empty($hook)) { |
| 340 | return PL_NOT_FOUND; |
| 341 | } |
| 342 | global $globals, $session; |
| 343 | if ($this->https && !@$_SERVER['HTTPS'] && $globals->core->secure_domain) { |
| 344 | http_redirect('https://' . $globals->core->secure_domain . $_SERVER['REQUEST_URI']); |
| 345 | } |
| 346 | |
| 347 | return $hook->call($page, $this->argv); |
| 348 | } |
| 349 | |
| 350 | /** Show the authentication form. |
| 351 | */ |
| 352 | abstract public function force_login(PlPage& $page); |
| 353 | |
| 354 | public function run() |
| 355 | { |
| 356 | $page =& self::page(); |
| 357 | |
| 358 | if (empty($this->path)) { |
| 359 | $this->path = 'index'; |
| 360 | } |
| 361 | |
| 362 | $page->assign('platal', $this); |
| 363 | switch ($this->call_hook($page)) { |
| 364 | case PL_FORBIDDEN: |
| 365 | $this->mods['core']->handler_403($page); |
| 366 | break; |
| 367 | |
| 368 | case PL_NOT_FOUND: |
| 369 | $this->mods['core']->handler_404($page); |
| 370 | break; |
| 371 | |
| 372 | case PL_WIKI: |
| 373 | return PL_WIKI; |
| 374 | } |
| 375 | |
| 376 | $page->assign('platal', $this); |
| 377 | $page->run(); |
| 378 | } |
| 379 | |
| 380 | public function error403() |
| 381 | { |
| 382 | $page =& self::page(); |
| 383 | |
| 384 | $this->mods['core']->handler_403($page); |
| 385 | $page->assign('platal', $this); |
| 386 | $page->run(); |
| 387 | } |
| 388 | |
| 389 | public function error404() |
| 390 | { |
| 391 | $page =& self::page(); |
| 392 | |
| 393 | $this->mods['core']->handler_404($page); |
| 394 | $page->assign('platal', $this); |
| 395 | $page->run(); |
| 396 | } |
| 397 | |
| 398 | public static function notAllowed() |
| 399 | { |
| 400 | if (S::admin()) { |
| 401 | self::page()->trigWarning('Tu accèdes à cette page car tu es administrateur du site.'); |
| 402 | return false; |
| 403 | } else { |
| 404 | return true; |
| 405 | } |
| 406 | } |
| 407 | |
| 408 | public static function load($modname, $include = null) |
| 409 | { |
| 410 | global $platal; |
| 411 | $modname = strtolower($modname); |
| 412 | if (isset($platal->mods[$modname])) { |
| 413 | if (is_null($include)) { |
| 414 | return; |
| 415 | } |
| 416 | $platal->mods[$modname]->load($include); |
| 417 | } else { |
| 418 | if (is_null($include)) { |
| 419 | require_once PLModule::path($modname) . '.php'; |
| 420 | } else { |
| 421 | require_once PLModule::path($modname) . '/' . $include; |
| 422 | } |
| 423 | } |
| 424 | } |
| 425 | |
| 426 | public static function assert($cond, $error, $userfriendly) |
| 427 | { |
| 428 | global $globals; |
| 429 | if ($cond === false) { |
| 430 | header($_SERVER['SERVER_PROTOCOL'] . ' 500 Internal Server Error'); |
| 431 | $file = fopen($globals->spoolroot . '/spool/tmp/assert_erros', 'a'); |
| 432 | fwrite($file, '<pre>' . pl_entities($error) . '</pre>\n'); |
| 433 | fclose($file); |
| 434 | |
| 435 | Platal::page()->kill($userfriendly); |
| 436 | } |
| 437 | } |
| 438 | |
| 439 | public function &buildLogger($uid, $suid = 0) |
| 440 | { |
| 441 | if (defined('PL_LOGGER_CLASS')) { |
| 442 | $class = PL_LOGGER_CLASS; |
| 443 | return new $class($uid, $suid); |
| 444 | } else { |
| 445 | return PlLogger::dummy($uid, $suid); |
| 446 | } |
| 447 | } |
| 448 | |
| 449 | protected function &buildPage() |
| 450 | { |
| 451 | $pageclass = PL_PAGE_CLASS; |
| 452 | $page = new $pageclass(); |
| 453 | return $page; |
| 454 | } |
| 455 | |
| 456 | static public function &page() |
| 457 | { |
| 458 | if (is_null(self::$_page)) { |
| 459 | global $platal; |
| 460 | self::$_page = $platal->buildPage(); |
| 461 | } |
| 462 | return self::$_page; |
| 463 | } |
| 464 | |
| 465 | protected function &buildSession() |
| 466 | { |
| 467 | $sessionclass = PL_SESSION_CLASS; |
| 468 | $session = new $sessionclass(); |
| 469 | return $session; |
| 470 | } |
| 471 | |
| 472 | static public function &session() |
| 473 | { |
| 474 | global $session; |
| 475 | return $session; |
| 476 | } |
| 477 | |
| 478 | protected function &buildGlobals() |
| 479 | { |
| 480 | $globalclass = PL_GLOBALS_CLASS; |
| 481 | $globals = new $globalclass(); |
| 482 | return $globals; |
| 483 | } |
| 484 | |
| 485 | static public function &globals() |
| 486 | { |
| 487 | global $globals; |
| 488 | return $globals; |
| 489 | } |
| 490 | } |
| 491 | |
| 492 | // vim:set et sw=4 sts=4 sws=4 foldmethod=marker enc=utf-8: |
| 493 | ?> |