| 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 | define('PL_WIKI_HOOK', '@@WIKI@@'); |
| 27 | |
| 28 | abstract class Platal |
| 29 | { |
| 30 | private $__mods; |
| 31 | private $__hooks; |
| 32 | |
| 33 | protected $https; |
| 34 | |
| 35 | public $ns; |
| 36 | public $path; |
| 37 | public $argv; |
| 38 | |
| 39 | static private $_page = null; |
| 40 | |
| 41 | public function __construct() |
| 42 | { |
| 43 | global $platal, $session, $globals; |
| 44 | $platal =& $this; |
| 45 | $globalclass = PL_GLOBALS_CLASS; |
| 46 | $globals = new $globalclass(); |
| 47 | $globals->init(); |
| 48 | $sessionclass = PL_SESSION_CLASS; |
| 49 | $session = new $sessionclass(); |
| 50 | if (!$session->startAvailableAuth()) { |
| 51 | Platal::page()->trigError("Données d'authentification invalides."); |
| 52 | } |
| 53 | |
| 54 | $modules = func_get_args(); |
| 55 | if (isset($modules[0]) && is_array($modules[0])) { |
| 56 | $modules = $modules[0]; |
| 57 | } |
| 58 | $this->path = trim(Get::_get('n', null), '/'); |
| 59 | |
| 60 | $this->__mods = array(); |
| 61 | $this->__hooks = array(); |
| 62 | |
| 63 | array_unshift($modules, 'core'); |
| 64 | foreach ($modules as $module) { |
| 65 | $module = strtolower($module); |
| 66 | $this->__mods[$module] = $m = PLModule::factory($module); |
| 67 | $this->__hooks = $m->handlers() + $this->__hooks; |
| 68 | } |
| 69 | |
| 70 | if ($globals->mode == '') { |
| 71 | pl_redirect('index.html'); |
| 72 | } |
| 73 | } |
| 74 | |
| 75 | public function pl_self($n = null) |
| 76 | { |
| 77 | if (is_null($n)) |
| 78 | return $this->path; |
| 79 | |
| 80 | if ($n >= 0) |
| 81 | return join('/', array_slice($this->argv, 0, $n + 1)); |
| 82 | |
| 83 | if ($n <= -count($this->argv)) |
| 84 | return $this->argv[0]; |
| 85 | |
| 86 | return join('/', array_slice($this->argv, 0, $n)); |
| 87 | } |
| 88 | |
| 89 | public static function wiki_hook($auth = AUTH_PUBLIC, $perms = 'user', $type = DO_AUTH) |
| 90 | { |
| 91 | return array('hook' => PL_WIKI_HOOK, |
| 92 | 'auth' => $auth, |
| 93 | 'perms' => $perms, |
| 94 | 'type' => $type); |
| 95 | } |
| 96 | |
| 97 | protected function find_hook() |
| 98 | { |
| 99 | $p = $this->path; |
| 100 | |
| 101 | while ($p) { |
| 102 | if (array_key_exists($p, $this->__hooks)) |
| 103 | break; |
| 104 | |
| 105 | $p = substr($p, 0, strrpos($p, '/')); |
| 106 | } |
| 107 | |
| 108 | if (empty($this->__hooks[$p])) { |
| 109 | return null; |
| 110 | } |
| 111 | |
| 112 | $hook = $this->__hooks[$p]; |
| 113 | |
| 114 | if (!is_callable($hook['hook']) && $hook['hook'] != PL_WIKI_HOOK) { |
| 115 | return null; |
| 116 | } |
| 117 | |
| 118 | $this->https = ($hook['type'] & NO_HTTPS) ? false : true; |
| 119 | $this->argv = explode('/', substr($this->path, strlen($p))); |
| 120 | $this->argv[0] = $p; |
| 121 | |
| 122 | return $hook; |
| 123 | } |
| 124 | |
| 125 | protected function find_nearest_key($key, array &$array) |
| 126 | { |
| 127 | $keys = array_keys($array); |
| 128 | if (in_array($key, $keys)) { |
| 129 | return $key; |
| 130 | } |
| 131 | |
| 132 | if (($pos = strpos($key, '.php')) !== false) { |
| 133 | $key = substr($key, 0, $pos); |
| 134 | } |
| 135 | |
| 136 | $has_end = in_array("#final#", $keys); |
| 137 | if (strlen($key) > 24 && $has_end) { |
| 138 | return "#final#"; |
| 139 | } |
| 140 | |
| 141 | foreach ($keys as $k) { |
| 142 | if ($k == "#final#") { |
| 143 | continue; |
| 144 | } |
| 145 | $lev = levenshtein($key, $k); |
| 146 | |
| 147 | if ((!isset($val) || $lev < $val) |
| 148 | && ($lev <= strlen($k)/2 || strpos($k, $key) !== false || strpos($key, $k) !== false)) { |
| 149 | $val = $lev; |
| 150 | $best = $k; |
| 151 | } |
| 152 | } |
| 153 | if (!isset($best) && $has_end) { |
| 154 | return "#final#"; |
| 155 | } else if (isset($best)) { |
| 156 | return $best; |
| 157 | } |
| 158 | return null; |
| 159 | } |
| 160 | |
| 161 | public function near_hook() |
| 162 | { |
| 163 | $hooks = array(); |
| 164 | $leafs = array(); |
| 165 | foreach ($this->__hooks as $hook=>$handler) { |
| 166 | if (!$this->check_perms($handler['perms'])) { |
| 167 | continue; |
| 168 | } |
| 169 | $parts = split('/', $hook); |
| 170 | $place =& $hooks; |
| 171 | foreach ($parts as $part) { |
| 172 | if (!isset($place[$part])) { |
| 173 | $place[$part] = array(); |
| 174 | } |
| 175 | $place =& $place[$part]; |
| 176 | } |
| 177 | $leaf = $parts[count($parts)-1]; |
| 178 | if (!isset($leafs[$leaf])) { |
| 179 | $leafs[$leaf] = $hook; |
| 180 | } else if (is_array($leafs[$leaf])) { |
| 181 | $leafs[$leaf][] = $hook; |
| 182 | } else { |
| 183 | $leafs[$leaf] = array($hook, $leafs[$leaf]); |
| 184 | } |
| 185 | $place["#final#"] = array(); |
| 186 | } |
| 187 | |
| 188 | // search for the nearest full path |
| 189 | $p = split('/', $this->path); |
| 190 | $place =& $hooks; |
| 191 | $link = ''; |
| 192 | foreach ($p as $k) { |
| 193 | if (!isset($ended)) { |
| 194 | $key = $this->find_nearest_key($k, $place); |
| 195 | } else { |
| 196 | $key = $k; |
| 197 | } |
| 198 | if ($key == "#final#") { |
| 199 | if (!array_key_exists($link, $this->__hooks)) { |
| 200 | $link = ''; |
| 201 | break; |
| 202 | } |
| 203 | $key = $k; |
| 204 | $ended = true; |
| 205 | } |
| 206 | if (!is_null($key)) { |
| 207 | if (!empty($link)) { |
| 208 | $link .= '/'; |
| 209 | } |
| 210 | $link .= $key; |
| 211 | $place =& $place[$key]; |
| 212 | } else { |
| 213 | $link = ''; |
| 214 | break; |
| 215 | } |
| 216 | } |
| 217 | if ($link == $this->path) { |
| 218 | $link = ''; |
| 219 | } |
| 220 | if ($link && levenshtein($link, $this->path) < strlen($link)/3) { |
| 221 | return $link; |
| 222 | } |
| 223 | |
| 224 | // search for missing namespace (the given name is a leaf) |
| 225 | $leaf = array_shift($p); |
| 226 | $args = count($p) ? '/' . implode('/', $p) : ''; |
| 227 | if (isset($leafs[$leaf]) && !is_array($leafs[$leaf]) && $leafs[$leaf] != $this->path) { |
| 228 | return $leafs[$leaf] . $args; |
| 229 | } |
| 230 | unset($val); |
| 231 | $best = null; |
| 232 | foreach ($leafs as $k=>&$path) { |
| 233 | if (is_array($path)) { |
| 234 | continue; |
| 235 | } |
| 236 | $lev = levenshtein($leaf, $k); |
| 237 | |
| 238 | if ((!isset($val) || $lev < $val) |
| 239 | && ($lev <= strlen($k)/2 || strpos($k, $leaf) !== false || strpos($leaf, $k) !== false)) { |
| 240 | $val = $lev; |
| 241 | $best = $path; |
| 242 | } |
| 243 | } |
| 244 | return $best == null ? ( $link ? $link : null ) : $best . $args; |
| 245 | } |
| 246 | |
| 247 | protected function check_perms($perms) |
| 248 | { |
| 249 | if (!$perms) { // No perms, no check |
| 250 | return true; |
| 251 | } |
| 252 | $s_perms = S::v('perms'); |
| 253 | return $s_perms->hasFlagCombination($perms); |
| 254 | } |
| 255 | |
| 256 | private function call_hook(PlPage &$page) |
| 257 | { |
| 258 | $hook = $this->find_hook(); |
| 259 | if (empty($hook)) { |
| 260 | return PL_NOT_FOUND; |
| 261 | } |
| 262 | global $globals, $session; |
| 263 | if ($this->https && !@$_SERVER['HTTPS'] && $globals->core->secure_domain) { |
| 264 | http_redirect('https://' . $globals->core->secure_domain . $_SERVER['REQUEST_URI']); |
| 265 | } |
| 266 | |
| 267 | $args = $this->argv; |
| 268 | $args[0] =& $page; |
| 269 | |
| 270 | if ($hook['auth'] > S::v('auth', AUTH_PUBLIC)) { |
| 271 | if ($hook['type'] & DO_AUTH) { |
| 272 | if (!$session->start($hook['auth'])) { |
| 273 | $this->force_login($page); |
| 274 | } |
| 275 | } else { |
| 276 | return PL_FORBIDDEN; |
| 277 | } |
| 278 | } |
| 279 | if ($hook['auth'] != AUTH_PUBLIC && !$this->check_perms($hook['perms'])) { |
| 280 | if (self::notAllowed()) { |
| 281 | return PL_FORBIDDEN; |
| 282 | } |
| 283 | } |
| 284 | |
| 285 | if ($hook['hook'] == PL_WIKI_HOOK) { |
| 286 | return PL_WIKI; |
| 287 | } |
| 288 | $val = call_user_func_array($hook['hook'], $args); |
| 289 | if ($val == PL_DO_AUTH) { |
| 290 | // The handler need a better auth with the current args |
| 291 | if (!$session->start($session->loggedLevel())) { |
| 292 | $this->force_login($page); |
| 293 | } |
| 294 | $val = call_user_func_array($hook['hook'], $args); |
| 295 | } |
| 296 | return $val; |
| 297 | } |
| 298 | |
| 299 | /** Show the authentication form. |
| 300 | */ |
| 301 | abstract public function force_login(PlPage& $page); |
| 302 | |
| 303 | public function run() |
| 304 | { |
| 305 | $page =& self::page(); |
| 306 | |
| 307 | if (empty($this->path)) { |
| 308 | $this->path = 'index'; |
| 309 | } |
| 310 | |
| 311 | $page->assign('platal', $this); |
| 312 | switch ($this->call_hook($page)) { |
| 313 | case PL_FORBIDDEN: |
| 314 | $this->__mods['core']->handler_403($page); |
| 315 | break; |
| 316 | |
| 317 | case PL_NOT_FOUND: |
| 318 | $this->__mods['core']->handler_404($page); |
| 319 | break; |
| 320 | |
| 321 | case PL_WIKI: |
| 322 | return PL_WIKI; |
| 323 | } |
| 324 | |
| 325 | $page->assign('platal', $this); |
| 326 | $page->run(); |
| 327 | } |
| 328 | |
| 329 | public function error403() |
| 330 | { |
| 331 | $page =& self::page(); |
| 332 | |
| 333 | $this->__mods['core']->handler_403($page); |
| 334 | $page->assign('platal', $this); |
| 335 | $page->run(); |
| 336 | } |
| 337 | |
| 338 | public function error404() |
| 339 | { |
| 340 | $page =& self::page(); |
| 341 | |
| 342 | $this->__mods['core']->handler_404($page); |
| 343 | $page->assign('platal', $this); |
| 344 | $page->run(); |
| 345 | } |
| 346 | |
| 347 | public static function notAllowed() |
| 348 | { |
| 349 | if (S::admin()) { |
| 350 | self::page()->trigWarning('Tu accèdes à cette page car tu es administrateur du site.'); |
| 351 | return false; |
| 352 | } else { |
| 353 | return true; |
| 354 | } |
| 355 | } |
| 356 | |
| 357 | public static function load($modname, $include = null) |
| 358 | { |
| 359 | global $platal; |
| 360 | $modname = strtolower($modname); |
| 361 | if (isset($platal->__mods[$modname])) { |
| 362 | if (is_null($include)) { |
| 363 | return; |
| 364 | } |
| 365 | $platal->__mods[$modname]->load($include); |
| 366 | } else { |
| 367 | if (is_null($include)) { |
| 368 | require_once PLModule::path($modname) . '.php'; |
| 369 | } else { |
| 370 | require_once PLModule::path($modname) . '/' . $include; |
| 371 | } |
| 372 | } |
| 373 | } |
| 374 | |
| 375 | public static function assert($cond, $error, $userfriendly) |
| 376 | { |
| 377 | global $globals; |
| 378 | if ($cond === false) { |
| 379 | header($_SERVER['SERVER_PROTOCOL'] . ' 500 Internal Server Error'); |
| 380 | $file = fopen($globals->spoolroot . '/spool/tmp/assert_erros', 'a'); |
| 381 | fwrite($file, '<pre>' . pl_entities($error) . '</pre>\n'); |
| 382 | fclose($file); |
| 383 | |
| 384 | Platal::page()->kill($userfriendly); |
| 385 | } |
| 386 | } |
| 387 | |
| 388 | |
| 389 | static public function &page() |
| 390 | { |
| 391 | global $platal; |
| 392 | if (is_null(self::$_page)) { |
| 393 | $pageclass = PL_PAGE_CLASS; |
| 394 | self::$_page = new $pageclass(); |
| 395 | } |
| 396 | return self::$_page; |
| 397 | } |
| 398 | |
| 399 | static public function &session() |
| 400 | { |
| 401 | global $session; |
| 402 | return $session; |
| 403 | } |
| 404 | |
| 405 | static public function &globals() |
| 406 | { |
| 407 | global $globals; |
| 408 | return $globals; |
| 409 | } |
| 410 | } |
| 411 | |
| 412 | // vim:set et sw=4 sts=4 sws=4 foldmethod=marker enc=utf-8: |
| 413 | ?> |