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  1. <?php
  2. /*
  3. Copyright (c) 2011, Anil Cetin
  4. All rights reserved.
  5.  
  6. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
  7.  
  8. * Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.
  9. * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the
  10. distribution.
  11. * Neither the name of the Anil Cetin nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.
  12.  
  13. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  14. FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
  15. BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  16. LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  17. */
  18.  
  19. class rewriteConf {
  20.  
  21. public function __construct($htContent){
  22. $this->htContent = $htContent;
  23. }
  24.  
  25. private function parseLine($line){
  26. list($cmd,$regex,$rew,$flags) = explode(" ",$line);
  27. if(!empty($flags)){
  28. $flagsArray = explode(",",trim(substr(substr(trim($flags),strpos($flags,'[')+1),0,strpos($flags,']')-1)));
  29. $flagsArray = array_map("trim",$flagsArray);
  30. }
  31. return array(trim($regex),trim($rew),$flagsArray);
  32. }
  33.  
  34. private function readRules(){
  35. $lines = explode("\n",$this->htContent);
  36. $i = 0;
  37. foreach($lines as $line){
  38. if($line[0] != '#' && !empty($line[0])){
  39. if(strpos($line,"RewriteCond") !== false){
  40. if(!isset($k))$k = 0;
  41. if(!isset($p))$p = 0;
  42. $parsedLine = $this->parseLine($line);
  43. $conds[$p] = array(
  44. 'match' => $parsedLine[0],
  45. 'rule' => $parsedLine[1],
  46. 'flags' => $parsedLine[2]
  47. );
  48. $p++;
  49. }
  50. if(strpos($line,"RewriteRule") !== false){
  51. if(!isset($k))$k = 0;
  52. $parsedLine = $this->parseLine($line);
  53. $condBit = 'AND';
  54. if(is_array($conds[0]["flags"]) && in_array('OR',$conds[0]["flags"]))$condBit = 'OR';
  55. $rules[$k] = array(
  56. 'rule' => array(
  57. 'regex' => $parsedLine[0],
  58. 'rew' => $parsedLine[1],
  59. 'flags' => $parsedLine[2]
  60. ),
  61. 'condBit' => $condBit,
  62. 'conditions' => $conds
  63. );
  64. unset($p,$conds,$parsedLine,$condBit);
  65. $k++;
  66. }
  67. }
  68. }
  69. return $rules;
  70. }
  71.  
  72.  
  73. private function parseFlags($flagArray,$type,$r,$c){
  74. //type: 0 -> rule 1-> condition
  75. //this function returns an array;
  76. /*
  77. array(
  78. return => 0|return code
  79. break => 0|1
  80. appendEnd => last|permanent|redirect|break
  81. env => var=value
  82. matchOperator => ~*|~
  83. unknown => 0|1
  84. set => key:var
  85. )
  86. */
  87. $returnArray = array('return' => '0','break' => '0','appendEnd' => '', 'env' => '', 'matchOperator' => '~');
  88. foreach($flagArray as $flag){
  89. switch($flag[0]){
  90. case 'N':
  91. case 'n':
  92. $returnArray["matchOperator"] = '~*';
  93. if(!isset($returnArray["unknown"]))$returnArray["unknown"] = '0';
  94. break;
  95. case 'F':
  96. case 'f':
  97. $returnArray["return"] = '403';
  98. $returnArray["break"] = '1';
  99. if(!isset($returnArray["unknown"]))$returnArray["unknown"] = '0';
  100. break;
  101. case 'G':
  102. case 'g':
  103. $returnArray["return"] = '410';
  104. $returnArray["break"] = '1';
  105. if(!isset($returnArray["unknown"]))$returnArray["unknown"] = '0';
  106. break;
  107. case 'R':
  108. case 'r':
  109. list($flaga,$rcode) = explode("=",$flag);
  110. if($rcode == '301' || $rcode == 'permanent'){
  111. $returnArray["appendEnd"] = 'permanent';
  112. } else {
  113. $returnArray["appendEnd"] = 'redirect';
  114. }
  115. $returnArray["break"] = '1';
  116. if(!isset($returnArray["unknown"]))$returnArray["unknown"] = '0';
  117. break;
  118. case 'L':
  119. case 'l':
  120. if(empty($returnArray["appendEnd"])){
  121. $returnArray["appendEnd"] = 'last';
  122. }
  123. if(!isset($returnArray["unknown"]))$returnArray["unknown"] = '0';
  124. break;
  125. case 'E':
  126. case 'e':
  127. list($cmd,$envvar) = explode("=",$flag);
  128. //list($ekey,$evar) = explode(":",$envvar);
  129. $returnArray["env"][] = $envvar;
  130. break;
  131. case 'O':
  132. case 'o':
  133. $returnArray["set"][] = '$rule_'.$r.' 1';
  134. break;
  135. case 'A':
  136. $returnArray["set"][] = '$rule_'.$r.' '.($c+1).'$rule_'.$r;
  137. break;
  138. }
  139. }
  140. if(count($flagArray) > 1){
  141. if(!isset($returnArray["unknown"]))$returnArray["unknown"] = '1';
  142. } else {
  143. $returnArray["unknown"] = '0';
  144. }
  145. return $returnArray;
  146.  
  147. }
  148.  
  149. private function parseCondMatch($condition,$r,$c,$condBit){
  150. $matchOperator = '~';
  151.  
  152. if($condition["rule"][0] == '!'){
  153. $nomatch = '!';
  154. $condition["rule"] = substr($condition["rule"],1);
  155. }
  156.  
  157. $condition["flags"][] = $condBit;
  158. $condition["flags"] = array_unique($condition["flags"]);
  159.  
  160.  
  161. $fromFlags = $this->parseFlags($condition["flags"],1,$r,$c);
  162.  
  163.  
  164. if($fromFlags["matchOperator"]){
  165. $matchOperator = $fromFlags["matchOperator"];
  166. }
  167.  
  168. switch($condition["rule"]){
  169. case "-f":
  170. case "-F":
  171. $left = $nomatch.'-f';
  172. $right = $condition["match"];
  173. $operand = '';
  174. break;
  175. case "-d":
  176. $left = $nomatch.'-d';
  177. $right = $condition["match"];
  178. $operand = '';
  179. break;
  180. case "-s":
  181. $left = $nomatch.'-e';
  182. $right = $condition["match"];
  183. $operand = '';
  184. break;
  185. default:
  186. $left = $condition["match"];
  187. $right = $condition["rule"];
  188. $operand = $nomatch.$matchOperator;
  189.  
  190. break;
  191. }
  192.  
  193. $returnArray = array(
  194. 'left' => $left,
  195. 'right' => $right,
  196. 'operand' => $operand,
  197. 'flags' => $fromFlags
  198. );
  199. return $returnArray;
  200. }
  201.  
  202. private function parseRewirteCond($rule,$r){
  203. $c = 0;
  204. if(is_array($rule["conditions"])){
  205. foreach($rule["conditions"] as $condition){
  206.  
  207. $condResult[$c] = $this->parseCondMatch($condition,$r,$c,$rule["condBit"]);
  208. $c++;
  209. }
  210. }
  211. return $condResult;
  212. }
  213.  
  214. private function mustSkipForCond($conditions){
  215. if(count($conditions)==0){
  216. return 0;
  217. } elseif(count($conditions) == 1) {
  218. if($conditions[0]["flags"]["unknown"] == 1){
  219. return "skipped because all flags in condition are unknown";
  220. }
  221. return 0;
  222. } else {
  223. $unknown = 0;
  224. foreach($conditions as $cond){
  225. if($cond["flags"]["unknown"] == 1){
  226. $unknown++;
  227. }
  228. }
  229. if(count($conditions) == $unknown){
  230. return "skipped because all flags for all conditions are unknown";
  231. }
  232. return 0;
  233. }
  234. }
  235.  
  236. private function setBackRef(&$rule,&$condsParsed){
  237. if(preg_match_all('/\%([0-9])/',$rule["rule"]["regex"],$matchesRule)!=0){
  238. $rule["rule"]["regex"] = preg_replace('/\%([0-9])/','$bref_$1',$rule["rule"]["regex"]);
  239. }
  240.  
  241. if(preg_match_all('/\%([0-9])/',$rule["rule"]["rew"],$matchesRew)!=0){
  242. $rule["rule"]["rew"] = preg_replace('/\%([0-9])/','$bref_$1',$rule["rule"]["rew"]);
  243. }
  244.  
  245. $totalMatches = array_merge($matchesRule[1],$matchesRew[1]);
  246.  
  247.  
  248. if(is_array($rule["rule"]["flags"])){
  249. $i=0;
  250. foreach($rule["rule"]["flags"] as $flags){
  251. if(preg_match_all('/\%([0-9])/',$rule["rule"]["flags"][$i],$matchesFlag)!=0){
  252. $rule["rule"]["flags"][$i] = preg_replace('/\%([0-9])/','$bref_$1',$rule["rule"]["flags"][$i]);
  253. $totalMatches = array_merge($totalMatches,$matchesFlag[1]);
  254. }
  255. $i++;
  256. }
  257. }
  258.  
  259. $totalMatches = array_unique($totalMatches);
  260. if(is_array($totalMatches)){
  261. foreach($totalMatches as $match){
  262. $i=0;
  263. if($rule["condBit"] == 'OR'){
  264. foreach($condsParsed as $cond){
  265. array_push($condsParsed[$i]["flags"]["set"], '$bref_'.$match.' $'.$match);
  266. $i++;
  267. }
  268. } else {
  269. array_push($condsParsed[count($condsParsed)-1]["flags"]["set"], '$bref_'.$match.' $'.$match);
  270. }
  271. }
  272. }
  273.  
  274.  
  275. }
  276.  
  277. private function parseRule(&$rule,$c){
  278.  
  279. if($rule["rule"]["regex"][0] == '^'){
  280. if($rule["rule"]["regex"][1]!='/'){
  281. $rule["rule"]["regex"] = '^/'.substr($rule["rule"]["regex"],1);
  282. }
  283. } else {
  284. if($rule["rule"]["regex"][0]!='/'){
  285. $rule["rule"]["regex"] = '/'.$rule["rule"]["regex"];
  286. }
  287. }
  288.  
  289. if($rule["rule"]["rew"][0] == '^' && substr($rule["rule"]["rew"],0,4) != 'http'){
  290. if($rule["rule"]["rew"][1]!='/'){
  291. $rule["rule"]["rew"] = '^/'.substr($rule["rule"]["rew"],1);
  292. }
  293. } else {
  294. if($rule["rule"]["rew"][0]!='/' && substr($rule["rule"]["rew"],0,4) != 'http'){
  295. $rule["rule"]["rew"] = '/'.$rule["rule"]["rew"];
  296. }
  297. }
  298.  
  299. if($rule["rule"]["rew"] == '/-'){
  300. unset($rule["rule"]["rew"],$rule["rule"]["regex"]);
  301. }
  302.  
  303.  
  304. if($c != 0){
  305.  
  306. if($rule["condBit"] == 'OR'){
  307. $rule["rule"]["trueExp"] = '1';
  308. } else {
  309. $i=0;
  310. while($i < $c){
  311. $backme = ($i+1).$backme;
  312. $i++;
  313. }
  314. $rule["rule"]["trueExp"] = $backme;
  315. }
  316. }
  317. }
  318.  
  319. private function replaceVariables(&$val,&$key){
  320.  
  321. if(preg_match_all('/\%\{HTTP\:(.*)\}/',$val,$matches)){
  322. foreach($matches[1] as $match){
  323. $val = str_replace('%{HTTP:'.$match.'}','$http_'.str_replace('-','_',strtolower($match)),$val);
  324. }
  325. }
  326.  
  327.  
  328. $pat = array(
  329. '%{HTTP_USER_AGENT}',
  330. '%{HTTP_REFERER}',
  331. '%{HTTP_COOKIE}',
  332. '%{HTTP_FORWARDED}',
  333. '%{HTTP_HOST}',
  334. '%{HTTP_PROXY_CONNECTION}',
  335. '%{HTTP_ACCEPT}',
  336. '%{REMOTE_ADDR}',
  337. '%{REMOTE_PORT}',
  338. '%{REMOTE_USER}',
  339. '%{REQUEST_METHOD}',
  340. '%{SCRIPT_FILENAME}',
  341. '%{PATH_INFO}',
  342. '%{QUERY_STRING}',
  343. '%{DOCUMENT_ROOT}',
  344. '%{SERVER_NAME}',
  345. '%{SERVER_ADDR}',
  346. '%{SERVER_PORT}',
  347. '%{SERVER_PROTOCOL}',
  348. '%{REQUEST_URI}',
  349. '%{REQUEST_FILENAME}'
  350. );
  351.  
  352. $rep = array(
  353. '$http_user_agent',
  354. '$http_referer',
  355. '$http_cookie',
  356. '$http_forwarded',
  357. '$http_host',
  358. '$http_proxy_connection',
  359. '$http_accept',
  360. '$remote_addr',
  361. '$remote_port',
  362. '$remote_user',
  363. '$request_method',
  364. '$uri',
  365. '$uri',
  366. '$args',
  367. '$document_root',
  368. '$server_name',
  369. '$server_addr',
  370. '$server_port',
  371. '$server_protocol',
  372. '$uri',
  373. '$request_filename'
  374. );
  375. $oldVal = $val;
  376. $val = str_replace($pat,$rep,$val);
  377.  
  378. if($oldVal == $val && preg_match('/\%\{(.*)\}/i',$val)!=0){
  379. $val = "IGNORE";
  380. }
  381. }
  382.  
  383.  
  384. private function walkRecursiveFuckZend(&$input, $funcname, $userdata = ""){
  385.  
  386. if (!is_array($input)){
  387. return false;
  388. }
  389.  
  390. foreach ($input AS $key => $value){
  391. if(is_array($input[$key])){
  392. $this->walkRecursiveFuckZend($input[$key], $funcname, $userdata);
  393. } else {
  394. $saved_value = $value;
  395. if(!empty($userdata)){
  396. $this->$funcname($value, $key, $userdata);
  397. } else {
  398. $this->$funcname($value, $key);
  399. }
  400.  
  401. if($value != $saved_value){
  402. if($value == 'IGNORE'){
  403. unset($input[$key]);
  404. } else {
  405. $input[$key] = $value;
  406. }
  407. }
  408. }
  409. }
  410. return true;
  411. }
  412.  
  413. public function writeConfig(){
  414. $r = 0;
  415. foreach($this->conf as $conf){
  416. if(is_array($conf)){
  417. //array_walk_recursive($conf,'rewriteConf::replaceVariables');
  418. $this->walkRecursiveFuckZend($conf,'replaceVariables');
  419. //print_r($conf);
  420. //exit;
  421. $c = 0;
  422. $parsedRules = 0;
  423. if(is_array($conf["conds"])){
  424. foreach($conf["conds"] as $cond){
  425. if($cond["flags"]["unknown"]!=1 && isset($cond["left"]) && isset($cond["right"])){
  426. if($cond["operand"] == ''){
  427. $ret.= 'if ('.$cond["left"].' '.$cond["right"].'){
  428. ';
  429. } else {
  430. $ret.= 'if ('.$cond["left"].' '.$cond["operand"].' "'.$cond["right"].'"){
  431. ';
  432. }
  433. if(is_array($cond["flags"]["set"])){
  434. foreach($cond["flags"]["set"] as $set){
  435. $ret.= ' set '.$set.';
  436. ';
  437. }
  438. }
  439.  
  440. if(is_array($cond["flags"]["env"])){
  441. foreach($cond["flags"]["env"] as $env){
  442. $ret.= ' setenv '.$env.';
  443. ';
  444. }
  445. }
  446. if($conf["condBit"] == 'OR'){
  447. if($conf["rule"]["flags"]["return"] > 0){
  448. $ret.= ' return '.$conf["rule"]["flags"]["return"].';
  449. ';
  450. $isReturned = 1;
  451. }
  452. if($conf["rule"]["flags"]["break"] == 1){
  453. $ret.= ' break;
  454. ';
  455. }
  456. }
  457. $ret.='}
  458. ';
  459. $parsedRules++;
  460. } else {
  461. $conf["rule"]["trueExp"] = str_replace($c,'',$conf["rule"]["trueExp"]);
  462. $ret.= '#ignored: condition '.$c.'
  463. ';
  464. }
  465. $c++;
  466. }
  467. }
  468. if(!isset($isReturned)){
  469. if($conf["rule"]["flags"]["unknown"] != 1){
  470.  
  471. if($parsedRules != 0){
  472. $ret.= 'if ($rule_'.$r.' = "'.$conf["rule"]["trueExp"].'"){
  473. ';
  474. }
  475. if($conf["rule"]["flags"]["return"] < 1){
  476.  
  477. if(is_array($conf["rule"]["flags"]["set"])){
  478. foreach($conf["rule"]["flags"]["set"] as $set){
  479. $ret.= ' set '.$set.';
  480. ';
  481. }
  482. }
  483.  
  484. if(is_array($conf["rule"]["flags"]["env"])){
  485. foreach($conf["rule"]["flags"]["env"] as $env){
  486. $ret.= ' setenv '.$env.';
  487. ';
  488. }
  489. }
  490. if(isset($conf["rule"]["regex"]) && isset($conf["rule"]["rew"])){
  491. $addBreak = 0;
  492. if(!empty($conf["rule"]["flags"]["appendEnd"])){
  493. if($conf["rule"]["flags"]["appendEnd"] == 'permanent' || $conf["rule"]["flags"]["appendEnd"] == 'redirect'){
  494. $addBreak = 1;
  495. }
  496. $conf["rule"]["flags"]["appendEnd"] = ' '.$conf["rule"]["flags"]["appendEnd"];
  497. }
  498. $ret.= ' rewrite '.$conf["rule"]["regex"].' '.$conf["rule"]["rew"].''.$conf["rule"]["flags"]["appendEnd"].';
  499. '; if($addBreak == 1){
  500. $ret.= ' break;
  501. ';
  502. }
  503. } else {
  504. $ret.= '#ignored: "-" thing used or unknown variable in regex/rew
  505. ';
  506. }
  507. } else {
  508. $ret.= ' return '.$conf["rule"]["flags"]["return"].';
  509. ';
  510. if($conf["rule"]["flags"]["break"] == 1){
  511. $ret.= ' break;
  512. ';
  513. }
  514. }
  515. if($parsedRules != 0){
  516. $ret.='}
  517. ';
  518. }
  519. } else {
  520. $ret.= '#ignored: unknown variable in rule flag
  521. ';
  522. }
  523. }
  524. unset($isReturned,$cond,$env,$set);
  525. } else {
  526. $ret.= $conf.'
  527. ';
  528. }
  529. $r++;
  530. }
  531. $this->confOk = $ret;
  532. }
  533.  
  534. public function parseContent(){
  535. $this->rules = $this->readRules();
  536. $r = 0;
  537. foreach($this->rules as $rule){
  538. $condsParsed = $this->parseRewirteCond($rule,$r);
  539. $beforeMscr = $mscr;
  540. if(($mscr = $this->mustSkipForCond($condsParsed))!=0){
  541. $conf[$r]["conds"] = $mscr;
  542. $conf[$r]["rule"] = $mscr;
  543. } else {
  544. if($beforeMscr != 0){
  545. //set last|break to before rule if any
  546. }
  547. $this->setBackRef($rule,$condsParsed);
  548. if(is_array($rule["rule"]["flags"])){
  549. $rule["rule"]["flags"] = $this->parseFlags($rule["rule"]["flags"],0,$r,0);
  550. } else {
  551. unset($rule["rule"]["flags"]);
  552. }
  553. $this->parseRule($rule,count($condsParsed));
  554. $conf[$r]["conds"] = $condsParsed;
  555. $conf[$r]["rule"] = $rule["rule"];
  556. }
  557. $conf[$r]["condBit"] = $rule["condBit"];
  558. $r++;
  559. }
  560. $this->conf = $conf;
  561. }
  562.  
  563. }
  564. ?>
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