1<?php 2 3use dokuwiki\Extension\EventHandler; 4use dokuwiki\Extension\Event; 5use dokuwiki\Logger; 6 7/** 8 * Action Component for the Bot Monitoring Plugin 9 * 10 * @license GPL 3 (http://www.gnu.org/licenses/gpl.html) 11 * @author Sascha Leib <sascha.leib(at)kolmio.com> 12 */ 13 14class action_plugin_botmon extends DokuWiki_Action_Plugin { 15 16 public function __construct() { 17 18 // determine if a captcha should be loaded: 19 $this->showCaptcha = 'Z'; // Captcha unknown 20 21 $useCaptcha = $this->getConf('useCaptcha'); // should we show a captcha? 22 23 if ($useCaptcha !== 'disabled') { 24 if ($_SERVER['REQUEST_METHOD'] == 'HEAD') { 25 $this->showCaptcha = 'H'; // Method is HEAD, no need for captcha 26 } elseif ($this->captchaWhitelisted()) { 27 $this->showCaptcha = 'W'; // IP is whitelisted, no captcha 28 } elseif ($this->hasCaptchaCookie()) { 29 $this->showCaptcha = 'N'; // No, user already has a cookie, don't show the captcha 30 } else { 31 $this->showCaptcha = 'Y'; // Yes, show the captcha 32 } 33 } 34 } 35 36 /** 37 * Registers a callback functions 38 * 39 * @param EventHandler $controller DokuWiki's event controller object 40 * @return void 41 */ 42 public function register(EventHandler $controller) { 43 44 global $ACT; 45 46 // populate the session id and type: 47 $this->setSessionInfo(); 48 49 // insert header data into the page: 50 if ($ACT == 'show' || $ACT == 'edit' || $ACT == 'media') { 51 $controller->register_hook('TPL_METAHEADER_OUTPUT', 'BEFORE', $this, 'insertHeader'); 52 53 // Override the page rendering, if a captcha needs to be displayed: 54 $controller->register_hook('TPL_ACT_RENDER', 'BEFORE', $this, 'insertCaptchaCode'); 55 56 } else if ($ACT == 'admin' && isset($_REQUEST['page']) && $_REQUEST['page'] == 'botmon') { 57 $controller->register_hook('TPL_METAHEADER_OUTPUT', 'BEFORE', $this, 'insertAdminHeader'); 58 } 59 60 // also show a captcha before the image preview 61 $controller->register_hook('TPL_IMG_DISPLAY', 'BEFORE', $this, 'showImageCaptcha'); 62 63 // write to the log after the page content was displayed: 64 $controller->register_hook('TPL_CONTENT_DISPLAY', 'AFTER', $this, 'writeServerLog'); 65 66 } 67 68 /* session information */ 69 private $sessionId = null; 70 private $sessionType = ''; 71 private $showCaptcha = 'X'; 72 73 /** 74 * Inserts tracking code to the page header 75 * (only called on 'show' actions) 76 * 77 * @param Event $event event object by reference 78 * @return void 79 */ 80 public function insertHeader(Event $event, $param) { 81 82 global $INFO; 83 84 85 // build the tracker code: 86 $code = $this->getBMHeader(); 87 88 // add the deferred script loader:: 89 $code .= DOKU_TAB . DOKU_TAB . "addEventListener('DOMContentLoaded', function(){" . NL; 90 $code .= DOKU_TAB . DOKU_TAB . DOKU_TAB . "const e=document.createElement('script');" . NL; 91 $code .= DOKU_TAB . DOKU_TAB . DOKU_TAB . "e.async=true;e.defer=true;" . NL; 92 $code .= DOKU_TAB . DOKU_TAB . DOKU_TAB . "e.src='".DOKU_BASE."lib/plugins/botmon/client.js';" . NL; 93 $code .= DOKU_TAB . DOKU_TAB . DOKU_TAB . "document.getElementsByTagName('head')[0].appendChild(e);" . NL; 94 $code .= DOKU_TAB . DOKU_TAB . "});"; 95 $event->data['script'][] = ['_data' => $code]; 96 } 97 98 /* create the BM object code for insertion into a script element: */ 99 private function getBMHeader() { 100 101 // build the tracker code: 102 $code = DOKU_TAB . DOKU_TAB . "document._botmon = {t0: Date.now(), session: " . json_encode($this->sessionId) . ", seed: " . json_encode($this->getConf('captchaSeed')) . ", ip: " . json_encode($_SERVER['REMOTE_ADDR']) . "};" . NL; 103 104 // is there a user logged in? 105 $username = ( !empty($INFO['userinfo']) && !empty($INFO['userinfo']['name']) ? $INFO['userinfo']['name'] : ''); 106 if ($username) { 107 $code .= DOKU_TAB . DOKU_TAB . 'document._botmon.user = "' . $username . '";'. NL; 108 } 109 110 return $code; 111 112 } 113 114 /** 115 * Inserts tracking code to the page header 116 * (only called on 'show' actions) 117 * 118 * @param Event $event event object by reference 119 * @return void 120 */ 121 public function insertAdminHeader(Event $event, $param) { 122 123 $event->data['link'][] = ['rel' => 'stylesheet', 'href' => DOKU_BASE.'lib/plugins/botmon/admin.css', 'defer' => 'defer']; 124 $event->data['script'][] = ['src' => DOKU_BASE.'lib/plugins/botmon/admin.js', 'defer' => 'defer', '_data' => '']; 125 } 126 127 /** 128 * Writes data to the server log. 129 * 130 * @return void 131 */ 132 public function writeServerLog(Event $event, $param) { 133 134 global $conf; 135 global $INFO; 136 137 // is there a user logged in? 138 $username = ( !empty($INFO['userinfo']) && !empty($INFO['userinfo']['name']) 139 ? $INFO['userinfo']['name'] : ''); 140 141 // clean the page ID 142 $pageId = preg_replace('/[\x00-\x1F]/', "\u{FFFD}", $INFO['id'] ?? ''); 143 144 // create the log array: 145 $logArr = Array( 146 $_SERVER['REMOTE_ADDR'], /* remote IP */ 147 $pageId, /* page ID */ 148 $this->sessionId, /* Session ID */ 149 $this->sessionType, /* session ID type */ 150 $username, /* user name */ 151 $_SERVER['HTTP_USER_AGENT'] ?? '', /* User agent */ 152 $_SERVER['HTTP_REFERER'] ?? '', /* HTTP Referrer */ 153 substr($conf['lang'],0,2), /* page language */ 154 implode(',', array_unique(array_map( function($it) { return substr(trim($it),0,2); }, explode(',',trim($_SERVER['HTTP_ACCEPT_LANGUAGE'], " \t;,*"))))), /* accepted client languages */ 155 $this->getCountryCode(), /* GeoIP country code */ 156 $this->showCaptcha, /* show captcha? */ 157 $_SERVER['REQUEST_METHOD'] ?? '' /* request method */ 158 ); 159 160 //* create the log line */ 161 $filename = __DIR__ .'/logs/' . gmdate('Y-m-d') . '.srv.txt'; /* use GMT date for filename */ 162 $logline = gmdate('Y-m-d H:i:s'); /* use GMT time for log entries */ 163 foreach ($logArr as $tab) { 164 $logline .= "\t" . $tab; 165 }; 166 167 /* write the log line to the file */ 168 $logfile = fopen($filename, 'a'); 169 if (!$logfile) die(); 170 if (fwrite($logfile, $logline . "\n") === false) { 171 fclose($logfile); 172 die(); 173 } 174 175 /* Done */ 176 fclose($logfile); 177 } 178 179 private function getCountryCode() { 180 181 $country = ( $_SERVER['REMOTE_ADDR'] == '127.0.0.1' ? 'local' : 'ZZ' ); // default if no geoip is available! 182 183 $lib = $this->getConf('geoiplib'); /* which library to use? (can only be phpgeoip or disabled) */ 184 185 try { 186 187 // use GeoIP module? 188 if ($lib == 'phpgeoip' && extension_loaded('geoip') && geoip_db_avail(GEOIP_COUNTRY_EDITION)) { // Use PHP GeoIP module 189 $result = geoip_country_code_by_name($_SERVER['REMOTE_ADDR']); 190 $country = ($result ? $result : $country); 191 } 192 } catch (Exception $e) { 193 Logger::error('BotMon Plugin: GeoIP Error', $e->getMessage()); 194 } 195 196 return $country; 197 } 198 199 private function setSessionInfo() { 200 201 // what is the session identifier? 202 if (isset($_SESSION)) { 203 $sesKeys = array_keys($_SESSION); /* DokuWiki Session ID preferred */ 204 foreach ($sesKeys as $key) { 205 if (substr($key, 0, 2) == 'DW') { 206 $this->sessionId = $key; 207 $this->sessionType = 'dw'; 208 return; 209 } 210 } 211 } 212 if (!$this->sessionId) { /* no DokuWiki Session ID, try PHP session ID */ 213 $this->sessionId = session_id(); 214 $this->sessionType = 'php'; 215 } 216 if (!$this->sessionId) { /* no PHP session ID, try IP address */ 217 $this->sessionId = $_SERVER['REMOTE_ADDR']; 218 $this->sessionType = 'ip'; 219 } 220 221 if (!$this->sessionId) { /* if all fails, use random data */ 222 $this->sessionId = rand(100000000, 999999999); 223 $this->sessionType = 'rnd'; 224 } 225 226 } 227 228 public function insertCaptchaCode(Event $event) { 229 230 $useCaptcha = $this->getConf('useCaptcha'); // which background to show? 231 232 // only if we previously determined that we need a captcha: 233 if ($this->showCaptcha == 'Y') { 234 235 echo '<h1 class="sectionedit1">'; tpl_pagetitle(); echo "</h1>\n"; // always show the original page title 236 $event->preventDefault(); // don't show normal content 237 switch ($useCaptcha) { 238 case 'loremipsum': 239 $this->insertLoremIpsum(); // show dada filler instead of text 240 break; 241 case 'dada': 242 $this->insertDadaFiller(); // show dada filler instead of text 243 break; 244 } 245 246 // insert the captcha loader code: 247 echo '<script>' . NL; 248 249 // add the deferred script loader:: 250 echo DOKU_TAB . "addEventListener('DOMContentLoaded', function(){" . NL; 251 echo DOKU_TAB . DOKU_TAB . "const cj=document.createElement('script');" . NL; 252 echo DOKU_TAB . DOKU_TAB . "cj.async=true;cj.defer=true;cj.type='text/javascript';" . NL; 253 echo DOKU_TAB . DOKU_TAB . "cj.src='".DOKU_BASE."lib/plugins/botmon/captcha.js';" . NL; 254 echo DOKU_TAB . DOKU_TAB . "document.getElementsByTagName('head')[0].appendChild(cj);" . NL; 255 echo DOKU_TAB . "});" . NL; 256 257 // add the translated strings for the captcha: 258 echo DOKU_TAB . '$BMLocales = {' . NL; 259 echo DOKU_TAB . DOKU_TAB . '"dlgTitle": ' . json_encode($this->getLang('bm_dlgTitle')) . ',' . NL; 260 echo DOKU_TAB . DOKU_TAB . '"dlgSubtitle": ' . json_encode($this->getLang('bm_dlgSubtitle')) . ',' . NL; 261 echo DOKU_TAB . DOKU_TAB . '"dlgConfirm": ' . json_encode($this->getLang('bm_dlgConfirm')) . ',' . NL; 262 echo DOKU_TAB . DOKU_TAB . '"dlgChecking": ' . json_encode($this->getLang('bm_dlgChecking')) . ',' . NL; 263 echo DOKU_TAB . DOKU_TAB . '"dlgLoading": ' . json_encode($this->getLang('bm_dlgLoading')) . ',' . NL; 264 echo DOKU_TAB . DOKU_TAB . '"dlgError": ' . json_encode($this->getLang('bm_dlgError')) . ',' . NL; 265 echo DOKU_TAB . '};' . NL; 266 267 // captcha configuration options 268 echo DOKU_TAB . '$BMConfig = {' . NL; 269 echo DOKU_TAB . DOKU_TAB . '"captchaBypass": ' . json_encode($this->getConf('captchaBypass')) . NL; 270 echo DOKU_TAB . '};' . NL; 271 272 echo '</script>' . NL; 273 } 274 } 275 276 public function showImageCaptcha(Event $event, $param) { 277 278 $useCaptcha = $this->getConf('useCaptcha'); 279 280 echo '<script>' . $this->getBMHeader($event, $param) . '</script>'; 281 282 $cCode = '-'; 283 if ($useCaptcha !== 'disabled') { 284 if ($this->captchaWhitelisted()) { 285 $cCode = 'W'; // whitelisted 286 } 287 elseif ($this->hasCaptchaCookie()) { 288 $cCode = 'N'; // user already has a cookie 289 } 290 else { 291 $cCode = 'Y'; // show the captcha 292 293 echo '<svg width="100%" height="100%" viewBox="0 0 800 400" version="1.1" xmlns="http://www.w3.org/2000/svg"><path d="M1,1l798,398" style="fill:none;stroke:#f00;stroke-width:1px;"/><path d="M1,399l798,-398" style="fill:none;stroke:#f00;stroke-width:1px;"/><rect x="1" y="1" width="798" height="398" style="fill:none;stroke:#000;stroke-width:1px;"/></svg>'; // placeholder image 294 $event->preventDefault(); // don't show normal content 295 296 // TODO Insert dummy image 297 $this->insertCaptchaLoader(); // and load the captcha 298 } 299 }; 300 301 $this->showCaptcha = $cCode; // store the captcha code for the logfile 302 } 303 304 private function hasCaptchaCookie() { 305 306 $cookieVal = isset($_COOKIE['DWConfirm']) ? $_COOKIE['DWConfirm'] : null; 307 308 $today = substr((new DateTime())->format('c'), 0, 10); 309 310 $raw = $this->getConf('captchaSeed') . '|' . $_SERVER['SERVER_NAME'] . '|' . $_SERVER['REMOTE_ADDR'] . '|' . $today; 311 $expected = hash('sha256', $raw); 312 313 //echo '<!-- cookieVal: ' . $cookieVal . ', expected: ' . $expected . ', seed: ' . $this->getConf('captchaSeed') . ', server: ' . $_SERVER['SERVER_NAME'] . ', ip: ' . $_SERVER['REMOTE_ADDR'] . ', date: ' . $today .'\' -->' . NL; 314 315 return $cookieVal == $expected; 316 } 317 318 // check if the visitor's IP is on a whitelist: 319 private function captchaWhitelisted() { 320 321 // normalise IP address: 322 $ip = inet_pton($_SERVER['REMOTE_ADDR']); 323 324 // find which file to open: 325 $prefixes = ['user', 'default']; 326 foreach ($prefixes as $pre) { 327 $filename = __DIR__ .'/config/' . $pre . '-whitelist.txt'; 328 if (file_exists($filename)) { 329 break; 330 } 331 } 332 333 if (file_exists($filename)) { 334 $lines = file($filename, FILE_SKIP_EMPTY_LINES); 335 foreach ($lines as $line) { 336 if (trim($line) !== '' && !str_starts_with($line, '#')) { 337 $col = explode("\t", $line); 338 if (count($col) >= 2) { 339 $from = inet_pton($col[0]); 340 $to = inet_pton($col[1]); 341 342 if ($ip >= $from && $ip <= $to) { 343 return true; /* IP whitelisted */ 344 } 345 } 346 } 347 } 348 } 349 return false; /* IP not found in whitelist */ 350 } 351 352 // inserts a blank box to ensure there is enough space for the captcha: 353 private function insertLoremIpsum() { 354 355 echo '<div class="level1">' . NL; 356 echo '<p>' . NL . 'Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.'. NL . '</p>' . NL; 357 echo '<p>' . NL . 'At vero eos et accusamus et iusto odio dignissimos ducimus, qui blanditiis praesentium voluptatum deleniti atque corrupti, quos dolores et quas molestias excepturi sint, obcaecati cupiditate non provident, similique sunt in culpa, qui officia deserunt mollitia animi, id est laborum et dolorum fuga.'. NL . '</p>' . NL; 358 echo '</div>' . NL; 359 360 } 361 362 /* Generates a few paragraphs of Dada text to show instead of the article content */ 363 private function insertDadaFiller() { 364 365 global $conf; 366 global $TOC; 367 global $ID; 368 369 // list of languages to search for the wordlist 370 $langs = array_unique([$conf['lang'], 'la']); 371 372 // find path to the first available wordlist: 373 foreach ($langs as $lang) { 374 $filename = __DIR__ .'/lang/' . $lang . '/wordlist.txt'; /* language-specific wordlist */ 375 if (file_exists($filename)) { 376 break; 377 } 378 } 379 380 // load the wordlist file: 381 if (file_exists($filename)) { 382 $words = array(); 383 $totalWeight = 0; 384 $lines = file($filename, FILE_SKIP_EMPTY_LINES); 385 foreach ($lines as $line) { 386 $arr = explode("\t", $line); 387 $arr[1] = ( count($arr) > 1 ? (int) trim($arr[1]) : 1 ); 388 $totalWeight += (int) $arr[1]; 389 array_push($words, $arr); 390 } 391 } else { 392 echo '<script> console.log("Can’t generate filler text: wordlist file not found!"); </script>'; 393 return; 394 } 395 396 // If a TOC exists, use it for the headlines: 397 if(is_array($TOC)) { 398 $toc = $TOC; 399 } else { 400 $meta = p_get_metadata($ID, '', METADATA_RENDER_USING_CACHE); 401 //$tocok = (isset($meta['internal']['toc']) ? $meta['internal']['toc'] : $tocok = true); 402 $toc = isset($meta['description']['tableofcontents']) ? $meta['description']['tableofcontents'] : null; 403 } 404 if (!$toc) { // no TOC, generate my own: 405 $hlCount = mt_rand(0, (int) $conf['tocminheads']); 406 $toc = array(); 407 for ($i=0; $i<$hlCount; $i++) { 408 array_push($toc, $this->dadaMakeHeadline($words, $totalWeight)); // $toc 409 } 410 } 411 412 // if H1 heading is not in the TOC, add a chappeau section: 413 $chapeauCount = mt_rand(1, 3); 414 if ((int) $conf['toptoclevel'] > 1) { 415 echo "<div class=\"level1\">\n"; 416 for ($i=0; $i<$chapeauCount; $i++) { 417 echo $this->dadaMakeParagraph($words, $totalWeight); 418 } 419 echo "</div>\n"; 420 } 421 422 // text sections for each sub-headline: 423 foreach ($toc as $hl) { 424 echo $this->dadaMakeSection($words, $totalWeight, $hl); 425 } 426 } 427 428 private function dadaMakeSection($words, $totalWeight, $hl) { 429 430 global $conf; 431 432 // how many paragraphs? 433 $paragraphCount = mt_rand(1, 4); 434 435 // section level 436 $topTocLevel = (int) $conf['toptoclevel']; 437 $secLevel = $hl['level'] + 1;; 438 439 // return value: 440 $sec = ""; 441 442 // make a headline: 443 if ($topTocLevel > 1 || $secLevel > 1) { 444 $sec .= "<h{$secLevel} id=\"{$hl['hid']}\">{$hl['title']}</h{$secLevel}>\n"; 445 } 446 447 // add the paragraphs: 448 $sec .= "<div class=\"level{$secLevel}\">\n"; 449 for ($i=0; $i<$paragraphCount; $i++) { 450 $sec .= $this->dadaMakeParagraph($words, $totalWeight); 451 } 452 $sec .= "</div>\n"; 453 454 return $sec; 455 } 456 457 private function dadaMakeHeadline($words, $totalWeight) { 458 459 // how many words to generate? 460 $wordCount = mt_rand(2, 5); 461 462 // function returns an array: 463 $r = Array(); 464 465 // generate the headline: 466 $hlArr = array(); 467 for ($i=0; $i<$wordCount; $i++) { 468 array_push($hlArr, $this->dadaSelectRandomWord($words, $totalWeight)); 469 } 470 471 $r['title'] = ucfirst(implode(' ', $hlArr)); 472 473 $r['hid'] = preg_replace('/[^\w\d\-]+/i', '_', strtolower($r['title'])); 474 $r['type'] = 'ul'; // always ul! 475 $r['level'] = 1; // always level 1 for now 476 477 return $r; 478 } 479 480 private function dadaMakeParagraph($words, $totalWeight) { 481 482 // how many words to generate? 483 $sentenceCount = mt_rand(2, 5); 484 485 $paragraph = array(); 486 for ($i=0; $i<$sentenceCount; $i++) { 487 array_push($paragraph, $this->dadaMakeSentence($words, $totalWeight)); 488 } 489 490 return "<p>\n" . implode(' ', $paragraph) . "\n</p>\n"; 491 492 } 493 494 private function dadaMakeSentence($words, $totalWeight) { 495 496 // how many words to generate? 497 $wordCount = mt_rand(4, 20); 498 499 // generate the sentence: 500 $sentence = array(); 501 for ($i=0; $i<$wordCount; $i++) { 502 array_push($sentence, $this->dadaSelectRandomWord($words, $totalWeight)); 503 } 504 505 return ucfirst(implode(' ', $sentence)) . '.'; 506 507 } 508 509 private function dadaSelectRandomWord($list, $totalWeight) { 510 511 // get a random selection: 512 $rand = mt_rand(0, $totalWeight); 513 514 // match the selection to the weighted list: 515 $cumulativeWeight = 0; 516 for ($i=0; $i<count($list); $i++) { 517 $cumulativeWeight += $list[$i][1]; 518 if ($cumulativeWeight >= $rand) { 519 return $list[$i][0]; 520 } 521 } 522 return '***'; 523 } 524 525}