Friendica Communications Platform (please note that this is a clone of the repository at github, issues are handled there) https://friendi.ca
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  1. <?php
  2. set_time_limit(0);
  3. define ( 'FRIENDIKA_VERSION', '2.1.940' );
  4. define ( 'DFRN_PROTOCOL_VERSION', '2.2' );
  5. define ( 'DB_UPDATE_VERSION', 1046 );
  6. define ( 'EOL', "<br />\r\n" );
  7. define ( 'ATOM_TIME', 'Y-m-d\TH:i:s\Z' );
  8. define ( 'DOWN_ARROW', '&#x21e9;' );
  9. /**
  10. * SSL redirection policies
  11. */
  12. define ( 'SSL_POLICY_NONE', 0 );
  13. define ( 'SSL_POLICY_FULL', 1 );
  14. define ( 'SSL_POLICY_SELFSIGN', 2 );
  15. /**
  16. * log levels
  17. */
  18. define ( 'LOGGER_NORMAL', 0 );
  19. define ( 'LOGGER_TRACE', 1 );
  20. define ( 'LOGGER_DEBUG', 2 );
  21. define ( 'LOGGER_DATA', 3 );
  22. define ( 'LOGGER_ALL', 4 );
  23. /**
  24. * registration policies
  25. */
  26. define ( 'REGISTER_CLOSED', 0 );
  27. define ( 'REGISTER_APPROVE', 1 );
  28. define ( 'REGISTER_OPEN', 2 );
  29. /**
  30. * relationship types
  31. * When used in contact records, this indicates that 'uid' has
  32. * this relationship with contact['name']
  33. */
  34. define ( 'REL_VIP', 1);
  35. define ( 'REL_FAN', 2);
  36. define ( 'REL_BUD', 3);
  37. /**
  38. * Hook array order
  39. */
  40. define ( 'HOOK_HOOK', 0);
  41. define ( 'HOOK_FILE', 1);
  42. define ( 'HOOK_FUNCTION', 2);
  43. /**
  44. *
  45. * page/profile types
  46. *
  47. * PAGE_NORMAL is a typical personal profile account
  48. * PAGE_SOAPBOX automatically approves all friend requests as REL_FAN, (readonly)
  49. * PAGE_COMMUNITY automatically approves all friend requests as REL_FAN, but with
  50. * write access to wall and comments (no email and not included in page owner's ACL lists)
  51. * PAGE_FREELOVE automatically approves all friend requests as full friends (REL_BUD).
  52. *
  53. */
  54. define ( 'PAGE_NORMAL', 0 );
  55. define ( 'PAGE_SOAPBOX', 1 );
  56. define ( 'PAGE_COMMUNITY', 2 );
  57. define ( 'PAGE_FREELOVE', 3 );
  58. /**
  59. * Maximum number of "people who like (or don't like) this" that we will list by name
  60. */
  61. define ( 'MAX_LIKERS', 75);
  62. /**
  63. * email notification options
  64. */
  65. define ( 'NOTIFY_INTRO', 0x0001 );
  66. define ( 'NOTIFY_CONFIRM', 0x0002 );
  67. define ( 'NOTIFY_WALL', 0x0004 );
  68. define ( 'NOTIFY_COMMENT', 0x0008 );
  69. define ( 'NOTIFY_MAIL', 0x0010 );
  70. /**
  71. * various namespaces we may need to parse
  72. */
  73. define ( 'NAMESPACE_DFRN' , 'http://purl.org/macgirvin/dfrn/1.0' );
  74. define ( 'NAMESPACE_THREAD' , 'http://purl.org/syndication/thread/1.0' );
  75. define ( 'NAMESPACE_TOMB' , 'http://purl.org/atompub/tombstones/1.0' );
  76. define ( 'NAMESPACE_ACTIVITY', 'http://activitystrea.ms/spec/1.0/' );
  77. define ( 'NAMESPACE_ACTIVITY_SCHEMA', 'http://activitystrea.ms/schema/1.0/' );
  78. define ( 'NAMESPACE_MEDIA', 'http://purl.org/syndication/atommedia' );
  79. define ( 'NAMESPACE_SALMON_ME', 'http://salmon-protocol.org/ns/magic-env' );
  80. define ( 'NAMESPACE_OSTATUSSUB', 'http://ostatus.org/schema/1.0/subscribe' );
  81. define ( 'NAMESPACE_GEORSS', 'http://www.georss.org/georss' );
  82. define ( 'NAMESPACE_POCO', 'http://portablecontacts.net/spec/1.0' );
  83. define ( 'NAMESPACE_FEED', 'http://schemas.google.com/g/2010#updates-from' );
  84. /**
  85. * activity stream defines
  86. */
  87. define ( 'ACTIVITY_LIKE', NAMESPACE_ACTIVITY_SCHEMA . 'like' );
  88. define ( 'ACTIVITY_DISLIKE', NAMESPACE_DFRN . '/dislike' );
  89. define ( 'ACTIVITY_OBJ_HEART', NAMESPACE_DFRN . '/heart' );
  90. define ( 'ACTIVITY_FRIEND', NAMESPACE_ACTIVITY_SCHEMA . 'make-friend' );
  91. define ( 'ACTIVITY_FOLLOW', NAMESPACE_ACTIVITY_SCHEMA . 'follow' );
  92. define ( 'ACTIVITY_UNFOLLOW', NAMESPACE_ACTIVITY_SCHEMA . 'stop-following' );
  93. define ( 'ACTIVITY_POST', NAMESPACE_ACTIVITY_SCHEMA . 'post' );
  94. define ( 'ACTIVITY_UPDATE', NAMESPACE_ACTIVITY_SCHEMA . 'update' );
  95. define ( 'ACTIVITY_TAG', NAMESPACE_ACTIVITY_SCHEMA . 'tag' );
  96. define ( 'ACTIVITY_OBJ_COMMENT', NAMESPACE_ACTIVITY_SCHEMA . 'comment' );
  97. define ( 'ACTIVITY_OBJ_NOTE', NAMESPACE_ACTIVITY_SCHEMA . 'note' );
  98. define ( 'ACTIVITY_OBJ_PERSON', NAMESPACE_ACTIVITY_SCHEMA . 'person' );
  99. define ( 'ACTIVITY_OBJ_PHOTO', NAMESPACE_ACTIVITY_SCHEMA . 'photo' );
  100. define ( 'ACTIVITY_OBJ_P_PHOTO', NAMESPACE_ACTIVITY_SCHEMA . 'profile-photo' );
  101. define ( 'ACTIVITY_OBJ_ALBUM', NAMESPACE_ACTIVITY_SCHEMA . 'photo-album' );
  102. /**
  103. * item weight for query ordering
  104. */
  105. define ( 'GRAVITY_PARENT', 0);
  106. define ( 'GRAVITY_LIKE', 3);
  107. define ( 'GRAVITY_COMMENT', 6);
  108. /**
  109. *
  110. * Reverse the effect of magic_quotes_gpc if it is enabled.
  111. * Please disable magic_quotes_gpc so we don't have to do this.
  112. * See http://php.net/manual/en/security.magicquotes.disabling.php
  113. *
  114. */
  115. if (get_magic_quotes_gpc()) {
  116. $process = array(&$_GET, &$_POST, &$_COOKIE, &$_REQUEST);
  117. while (list($key, $val) = each($process)) {
  118. foreach ($val as $k => $v) {
  119. unset($process[$key][$k]);
  120. if (is_array($v)) {
  121. $process[$key][stripslashes($k)] = $v;
  122. $process[] = &$process[$key][stripslashes($k)];
  123. } else {
  124. $process[$key][stripslashes($k)] = stripslashes($v);
  125. }
  126. }
  127. }
  128. unset($process);
  129. }
  130. /*
  131. * translation system
  132. */
  133. require_once("include/pgettext.php");
  134. /**
  135. *
  136. * class: App
  137. *
  138. * Our main application structure for the life of this page
  139. * Primarily deals with the URL that got us here
  140. * and tries to make some sense of it, and
  141. * stores our page contents and config storage
  142. * and anything else that might need to be passed around
  143. * before we spit the page out.
  144. *
  145. */
  146. if(! class_exists('App')) {
  147. class App {
  148. public $module_loaded = false;
  149. public $query_string;
  150. public $config;
  151. public $page;
  152. public $profile;
  153. public $user;
  154. public $cid;
  155. public $contact;
  156. public $content;
  157. public $data;
  158. public $error = false;
  159. public $cmd;
  160. public $argv;
  161. public $argc;
  162. public $module;
  163. public $pager;
  164. public $strings;
  165. public $path;
  166. public $hooks;
  167. public $timezone;
  168. public $interactive = true;
  169. public $plugins;
  170. public $apps;
  171. public $identities;
  172. private $scheme;
  173. private $hostname;
  174. private $baseurl;
  175. private $db;
  176. private $curl_code;
  177. private $curl_headers;
  178. function __construct() {
  179. $this->config = array();
  180. $this->page = array();
  181. $this->pager= array();
  182. $this->query_string = '';
  183. $this->scheme = ((isset($_SERVER['HTTPS']) && ($_SERVER['HTTPS'])) ? 'https' : 'http' );
  184. if(x($_SERVER,'SERVER_NAME')) {
  185. $this->hostname = $_SERVER['SERVER_NAME'];
  186. /**
  187. * Figure out if we are running at the top of a domain
  188. * or in a sub-directory and adjust accordingly
  189. */
  190. $path = trim(dirname($_SERVER['SCRIPT_NAME']),'/\\');
  191. if(isset($path) && strlen($path) && ($path != $this->path))
  192. $this->path = $path;
  193. }
  194. set_include_path("include/$this->hostname" . PATH_SEPARATOR . 'include' . PATH_SEPARATOR . '.' );
  195. if((x($_SERVER,'QUERY_STRING')) && substr($_SERVER['QUERY_STRING'],0,2) === "q=")
  196. $this->query_string = substr($_SERVER['QUERY_STRING'],2);
  197. if(x($_GET,'q'))
  198. $this->cmd = trim($_GET['q'],'/\\');
  199. /**
  200. *
  201. * Break the URL path into C style argc/argv style arguments for our
  202. * modules. Given "http://example.com/module/arg1/arg2", $this->argc
  203. * will be 3 (integer) and $this->argv will contain:
  204. * [0] => 'module'
  205. * [1] => 'arg1'
  206. * [2] => 'arg2'
  207. *
  208. *
  209. * There will always be one argument. If provided a naked domain
  210. * URL, $this->argv[0] is set to "home".
  211. *
  212. */
  213. $this->argv = explode('/',$this->cmd);
  214. $this->argc = count($this->argv);
  215. if((array_key_exists('0',$this->argv)) && strlen($this->argv[0])) {
  216. $this->module = $this->argv[0];
  217. }
  218. else {
  219. $this->module = 'home';
  220. }
  221. /**
  222. * Special handling for the webfinger/lrdd host XRD file
  223. * Just spit out the contents and exit.
  224. */
  225. if($this->cmd === '.well-known/host-meta') {
  226. require_once('include/hostxrd.php');
  227. hostxrd($this->hostname);
  228. // NOTREACHED
  229. }
  230. /**
  231. * See if there is any page number information, and initialise
  232. * pagination
  233. */
  234. $this->pager['page'] = ((x($_GET,'page')) ? $_GET['page'] : 1);
  235. $this->pager['itemspage'] = 50;
  236. $this->pager['start'] = ($this->pager['page'] * $this->pager['itemspage']) - $this->pager['itemspage'];
  237. $this->pager['total'] = 0;
  238. }
  239. function get_baseurl($ssl = false) {
  240. $scheme = $this->scheme;
  241. if(x($this->config,'ssl_policy')) {
  242. if(($ssl) || ($this->config['ssl_policy'] == SSL_POLICY_FULL))
  243. $scheme = 'https';
  244. if(($this->config['ssl_policy'] == SSL_POLICY_SELFSIGN) && (local_user() || x($_POST,'auth-params')))
  245. $scheme = 'https';
  246. }
  247. $this->baseurl = $scheme . "://" . $this->hostname . ((isset($this->path) && strlen($this->path)) ? '/' . $this->path : '' );
  248. return $this->baseurl;
  249. }
  250. function set_baseurl($url) {
  251. $parsed = @parse_url($url);
  252. $this->baseurl = $url;
  253. if($parsed) {
  254. $this->scheme = $parsed['scheme'];
  255. $this->hostname = $parsed['host'];
  256. if(x($parsed,'port'))
  257. $this->hostname .= ':' . $parsed['port'];
  258. if(x($parsed,'path'))
  259. $this->path = trim($parsed['path'],'\\/');
  260. }
  261. }
  262. function get_hostname() {
  263. return $this->hostname;
  264. }
  265. function set_hostname($h) {
  266. $this->hostname = $h;
  267. }
  268. function set_path($p) {
  269. $this->path = trim(trim($p),'/');
  270. }
  271. function get_path() {
  272. return $this->path;
  273. }
  274. function set_pager_total($n) {
  275. $this->pager['total'] = intval($n);
  276. }
  277. function set_pager_itemspage($n) {
  278. $this->pager['itemspage'] = intval($n);
  279. $this->pager['start'] = ($this->pager['page'] * $this->pager['itemspage']) - $this->pager['itemspage'];
  280. }
  281. function init_pagehead() {
  282. $this->page['title'] = $this->config['sitename'];
  283. $tpl = load_view_file('view/head.tpl');
  284. $this->page['htmlhead'] = replace_macros($tpl,array(
  285. '$baseurl' => $this->get_baseurl() . '/',
  286. '$generator' => 'Friendika' . ' ' . FRIENDIKA_VERSION,
  287. '$delitem' => t('Delete this item?'),
  288. '$comment' => t('Comment')
  289. ));
  290. }
  291. function set_curl_code($code) {
  292. $this->curl_code = $code;
  293. }
  294. function get_curl_code() {
  295. return $this->curl_code;
  296. }
  297. function set_curl_headers($headers) {
  298. $this->curl_headers = $headers;
  299. }
  300. function get_curl_headers() {
  301. return $this->curl_headers;
  302. }
  303. }}
  304. // retrieve the App structure
  305. // useful in functions which require it but don't get it passed to them
  306. if(! function_exists('get_app')) {
  307. function get_app() {
  308. global $a;
  309. return $a;
  310. }};
  311. // Multi-purpose function to check variable state.
  312. // Usage: x($var) or $x($array,'key')
  313. // returns false if variable/key is not set
  314. // if variable is set, returns 1 if has 'non-zero' value, otherwise returns 0.
  315. // e.g. x('') or x(0) returns 0;
  316. if(! function_exists('x')) {
  317. function x($s,$k = NULL) {
  318. if($k != NULL) {
  319. if((is_array($s)) && (array_key_exists($k,$s))) {
  320. if($s[$k])
  321. return (int) 1;
  322. return (int) 0;
  323. }
  324. return false;
  325. }
  326. else {
  327. if(isset($s)) {
  328. if($s) {
  329. return (int) 1;
  330. }
  331. return (int) 0;
  332. }
  333. return false;
  334. }
  335. }}
  336. // called from db initialisation if db is dead.
  337. if(! function_exists('system_unavailable')) {
  338. function system_unavailable() {
  339. include('system_unavailable.php');
  340. system_down();
  341. killme();
  342. }}
  343. // Primarily involved with database upgrade, but also sets the
  344. // base url for use in cmdline programs which don't have
  345. // $_SERVER variables, and synchronising the state of installed plugins.
  346. if(! function_exists('check_config')) {
  347. function check_config(&$a) {
  348. load_config('system');
  349. $build = get_config('system','build');
  350. if(! x($build))
  351. $build = set_config('system','build',DB_UPDATE_VERSION);
  352. $url = get_config('system','url');
  353. // if the url isn't set or the stored url is radically different
  354. // than the currently visited url, store the current value accordingly.
  355. // "Radically different" ignores common variations such as http vs https
  356. // and www.example.com vs example.com.
  357. if((! x($url)) || (! link_compare($url,$a->get_baseurl())))
  358. $url = set_config('system','url',$a->get_baseurl());
  359. if($build != DB_UPDATE_VERSION) {
  360. $stored = intval($build);
  361. $current = intval(DB_UPDATE_VERSION);
  362. if(($stored < $current) && file_exists('update.php')) {
  363. // We're reporting a different version than what is currently installed.
  364. // Run any existing update scripts to bring the database up to current.
  365. require_once('update.php');
  366. for($x = $stored; $x < $current; $x ++) {
  367. if(function_exists('update_' . $x)) {
  368. $func = 'update_' . $x;
  369. $func($a);
  370. }
  371. }
  372. set_config('system','build', DB_UPDATE_VERSION);
  373. }
  374. }
  375. /**
  376. *
  377. * Synchronise plugins:
  378. *
  379. * $a->config['system']['addon'] contains a comma-separated list of names
  380. * of plugins/addons which are used on this system.
  381. * Go through the database list of already installed addons, and if we have
  382. * an entry, but it isn't in the config list, call the uninstall procedure
  383. * and mark it uninstalled in the database (for now we'll remove it).
  384. * Then go through the config list and if we have a plugin that isn't installed,
  385. * call the install procedure and add it to the database.
  386. *
  387. */
  388. $r = q("SELECT * FROM `addon` WHERE `installed` = 1");
  389. if(count($r))
  390. $installed = $r;
  391. else
  392. $installed = array();
  393. $plugins = get_config('system','addon');
  394. $plugins_arr = array();
  395. if($plugins)
  396. $plugins_arr = explode(',',str_replace(' ', '',$plugins));
  397. $a->plugins = $plugins_arr;
  398. $installed_arr = array();
  399. if(count($installed)) {
  400. foreach($installed as $i) {
  401. if(! in_array($i['name'],$plugins_arr)) {
  402. logger("Addons: uninstalling " . $i['name']);
  403. q("DELETE FROM `addon` WHERE `id` = %d LIMIT 1",
  404. intval($i['id'])
  405. );
  406. @include_once('addon/' . $i['name'] . '/' . $i['name'] . '.php');
  407. if(function_exists($i['name'] . '_uninstall')) {
  408. $func = $i['name'] . '_uninstall';
  409. $func();
  410. }
  411. }
  412. else
  413. $installed_arr[] = $i['name'];
  414. }
  415. }
  416. if(count($plugins_arr)) {
  417. foreach($plugins_arr as $p) {
  418. if(! in_array($p,$installed_arr)) {
  419. logger("Addons: installing " . $p);
  420. $t = filemtime('addon/' . $p . '/' . $p . '.php');
  421. @include_once('addon/' . $p . '/' . $p . '.php');
  422. if(function_exists($p . '_install')) {
  423. $func = $p . '_install';
  424. $func();
  425. $r = q("INSERT INTO `addon` (`name`, `installed`, `timestamp`) VALUES ( '%s', 1, %d ) ",
  426. dbesc($p),
  427. intval($t)
  428. );
  429. }
  430. }
  431. }
  432. }
  433. load_hooks();
  434. return;
  435. }}
  436. // reload all updated plugins
  437. if(! function_exists('reload_plugins')) {
  438. function reload_plugins() {
  439. $plugins = get_config('system','addon');
  440. if(strlen($plugins)) {
  441. $r = q("SELECT * FROM `addon` WHERE `installed` = 1");
  442. if(count($r))
  443. $installed = $r;
  444. else
  445. $installed = array();
  446. $parr = explode(',',$plugins);
  447. if(count($parr)) {
  448. foreach($parr as $pl) {
  449. $pl = trim($pl);
  450. $t = filemtime('addon/' . $pl . '/' . $pl . '.php');
  451. foreach($installed as $i) {
  452. if(($i['name'] == $pl) && ($i['timestamp'] != $t)) {
  453. logger('Reloading plugin: ' . $i['name']);
  454. @include_once('addon/' . $pl . '/' . $pl . '.php');
  455. if(function_exists($pl . '_uninstall')) {
  456. $func = $pl . '_uninstall';
  457. $func();
  458. }
  459. if(function_exists($pl . '_install')) {
  460. $func = $pl . '_install';
  461. $func();
  462. }
  463. q("UPDATE `addon` SET `timestamp` = %d WHERE `id` = %d LIMIT 1",
  464. intval($t),
  465. intval($i['id'])
  466. );
  467. }
  468. }
  469. }
  470. }
  471. }
  472. }}
  473. // This is our template processor.
  474. // $s is the string requiring macro substitution.
  475. // $r is an array of key value pairs (search => replace)
  476. // returns substituted string.
  477. // WARNING: this is pretty basic, and doesn't properly handle search strings that are substrings of each other.
  478. // For instance if 'test' => "foo" and 'testing' => "bar", testing could become either bar or fooing,
  479. // depending on the order in which they were declared in the array.
  480. if(! function_exists('replace_macros')) {
  481. function replace_macros($s,$r) {
  482. $search = array();
  483. $replace = array();
  484. if(is_array($r) && count($r)) {
  485. foreach ($r as $k => $v ) {
  486. $search[] = $k;
  487. $replace[] = $v;
  488. }
  489. }
  490. return str_replace($search,$replace,$s);
  491. }}
  492. // curl wrapper. If binary flag is true, return binary
  493. // results.
  494. if(! function_exists('fetch_url')) {
  495. function fetch_url($url,$binary = false, &$redirects = 0) {
  496. $a = get_app();
  497. $ch = curl_init($url);
  498. if(($redirects > 8) || (! $ch))
  499. return false;
  500. curl_setopt($ch, CURLOPT_HEADER, true);
  501. curl_setopt($ch, CURLOPT_RETURNTRANSFER,true);
  502. $curl_time = intval(get_config('system','curl_timeout'));
  503. curl_setopt($ch, CURLOPT_TIMEOUT, (($curl_time !== false) ? $curl_time : 60));
  504. // by default we will allow self-signed certs
  505. // but you can override this
  506. $check_cert = get_config('system','verifyssl');
  507. curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, (($check_cert) ? true : false));
  508. $prx = get_config('system','proxy');
  509. if(strlen($prx)) {
  510. curl_setopt($ch, CURLOPT_HTTPPROXYTUNNEL, 1);
  511. curl_setopt($ch, CURLOPT_PROXY, $prx);
  512. $prxusr = get_config('system','proxyuser');
  513. if(strlen($prxusr))
  514. curl_setopt($ch, CURLOPT_PROXYUSERPWD, $prxusr);
  515. }
  516. if($binary)
  517. curl_setopt($ch, CURLOPT_BINARYTRANSFER,1);
  518. $a->set_curl_code(0);
  519. // don't let curl abort the entire application
  520. // if it throws any errors.
  521. $s = @curl_exec($ch);
  522. $http_code = intval(curl_getinfo($ch, CURLINFO_HTTP_CODE));
  523. $header = substr($s,0,strpos($s,"\r\n\r\n"));
  524. if(stristr($header,'100') && (strlen($header) < 30)) {
  525. // 100 Continue has two headers, get the real one
  526. $s = substr($s,strlen($header)+4);
  527. $header = substr($s,0,strpos($s,"\r\n\r\n"));
  528. }
  529. if($http_code == 301 || $http_code == 302 || $http_code == 303) {
  530. $matches = array();
  531. preg_match('/(Location:|URI:)(.*?)\n/', $header, $matches);
  532. $url = trim(array_pop($matches));
  533. $url_parsed = @parse_url($url);
  534. if (isset($url_parsed)) {
  535. $redirects++;
  536. return fetch_url($url,$binary,$redirects);
  537. }
  538. }
  539. $a->set_curl_code($http_code);
  540. $body = substr($s,strlen($header)+4);
  541. /* one more try to make sure there are no more headers */
  542. if(strpos($body,'HTTP/') === 0) {
  543. $header = substr($body,0,strpos($body,"\r\n\r\n"));
  544. $body = substr($body,strlen($header)+4);
  545. }
  546. $a->set_curl_headers($header);
  547. curl_close($ch);
  548. return($body);
  549. }}
  550. // post request to $url. $params is an array of post variables.
  551. if(! function_exists('post_url')) {
  552. function post_url($url,$params, $headers = null, &$redirects = 0) {
  553. $a = get_app();
  554. $ch = curl_init($url);
  555. if(($redirects > 8) || (! $ch))
  556. return false;
  557. curl_setopt($ch, CURLOPT_HEADER, true);
  558. curl_setopt($ch, CURLOPT_RETURNTRANSFER,true);
  559. curl_setopt($ch, CURLOPT_POST,1);
  560. curl_setopt($ch, CURLOPT_POSTFIELDS,$params);
  561. $curl_time = intval(get_config('system','curl_timeout'));
  562. curl_setopt($ch, CURLOPT_TIMEOUT, (($curl_time !== false) ? $curl_time : 60));
  563. if(is_array($headers))
  564. curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
  565. $check_cert = get_config('system','verifyssl');
  566. curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, (($check_cert) ? true : false));
  567. $prx = get_config('system','proxy');
  568. if(strlen($prx)) {
  569. curl_setopt($ch, CURLOPT_HTTPPROXYTUNNEL, 1);
  570. curl_setopt($ch, CURLOPT_PROXY, $prx);
  571. $prxusr = get_config('system','proxyuser');
  572. if(strlen($prxusr))
  573. curl_setopt($ch, CURLOPT_PROXYUSERPWD, $prxusr);
  574. }
  575. $a->set_curl_code(0);
  576. // don't let curl abort the entire application
  577. // if it throws any errors.
  578. $s = @curl_exec($ch);
  579. $http_code = intval(curl_getinfo($ch, CURLINFO_HTTP_CODE));
  580. $header = substr($s,0,strpos($s,"\r\n\r\n"));
  581. if(stristr($header,'100') && (strlen($header) < 30)) {
  582. // 100 Continue has two headers, get the real one
  583. $s = substr($s,strlen($header)+4);
  584. $header = substr($s,0,strpos($s,"\r\n\r\n"));
  585. }
  586. if($http_code == 301 || $http_code == 302 || $http_code == 303) {
  587. $matches = array();
  588. preg_match('/(Location:|URI:)(.*?)\n/', $header, $matches);
  589. $url = trim(array_pop($matches));
  590. $url_parsed = @parse_url($url);
  591. if (isset($url_parsed)) {
  592. $redirects++;
  593. return post_url($url,$binary,$headers,$redirects);
  594. }
  595. }
  596. $a->set_curl_code($http_code);
  597. $body = substr($s,strlen($header)+4);
  598. /* one more try to make sure there are no more headers */
  599. if(strpos($body,'HTTP/') === 0) {
  600. $header = substr($body,0,strpos($body,"\r\n\r\n"));
  601. $body = substr($body,strlen($header)+4);
  602. }
  603. $a->set_curl_headers($header);
  604. curl_close($ch);
  605. return($body);
  606. }}
  607. // random hash, 64 chars
  608. if(! function_exists('random_string')) {
  609. function random_string() {
  610. return(hash('sha256',uniqid(rand(),true)));
  611. }}
  612. /**
  613. * This is our primary input filter.
  614. *
  615. * The high bit hack only involved some old IE browser, forget which (IE5/Mac?)
  616. * that had an XSS attack vector due to stripping the high-bit on an 8-bit character
  617. * after cleansing, and angle chars with the high bit set could get through as markup.
  618. *
  619. * This is now disabled because it was interfering with some legitimate unicode sequences
  620. * and hopefully there aren't a lot of those browsers left.
  621. *
  622. * Use this on any text input where angle chars are not valid or permitted
  623. * They will be replaced with safer brackets. This may be filtered further
  624. * if these are not allowed either.
  625. *
  626. */
  627. if(! function_exists('notags')) {
  628. function notags($string) {
  629. return(str_replace(array("<",">"), array('[',']'), $string));
  630. // High-bit filter no longer used
  631. // return(str_replace(array("<",">","\xBA","\xBC","\xBE"), array('[',']','','',''), $string));
  632. }}
  633. // use this on "body" or "content" input where angle chars shouldn't be removed,
  634. // and allow them to be safely displayed.
  635. if(! function_exists('escape_tags')) {
  636. function escape_tags($string) {
  637. return(htmlspecialchars($string));
  638. }}
  639. // wrapper for adding a login box. If $register == true provide a registration
  640. // link. This will most always depend on the value of $a->config['register_policy'].
  641. // returns the complete html for inserting into the page
  642. if(! function_exists('login')) {
  643. function login($register = false) {
  644. $o = "";
  645. $register_tpl = (($register) ? load_view_file("view/register-link.tpl") : "");
  646. $register_html = replace_macros($register_tpl,array(
  647. '$title' => t('Create a New Account'),
  648. '$desc' => t('Register')
  649. ));
  650. $noid = get_config('system','no_openid');
  651. if($noid) {
  652. $classname = 'no-openid';
  653. $namelabel = t('Nickname or Email address: ');
  654. $passlabel = t('Password: ');
  655. $login = t('Login');
  656. }
  657. else {
  658. $classname = 'openid';
  659. $namelabel = t('Nickname/Email/OpenID: ');
  660. $passlabel = t("Password \x28if not OpenID\x29: ");
  661. $login = t('Login');
  662. }
  663. $lostpass = t('Forgot your password?');
  664. $lostlink = t('Password Reset');
  665. if(local_user()) {
  666. $tpl = load_view_file("view/logout.tpl");
  667. }
  668. else {
  669. $tpl = load_view_file("view/login.tpl");
  670. }
  671. $o = replace_macros($tpl,array(
  672. '$logout' => t('Logout'),
  673. '$register_html' => $register_html,
  674. '$classname' => $classname,
  675. '$namelabel' => $namelabel,
  676. '$passlabel' => $passlabel,
  677. '$login' => $login,
  678. '$lostpass' => $lostpass,
  679. '$lostlink' => $lostlink
  680. ));
  681. return $o;
  682. }}
  683. // generate a string that's random, but usually pronounceable.
  684. // used to generate initial passwords
  685. if(! function_exists('autoname')) {
  686. function autoname($len) {
  687. $vowels = array('a','a','ai','au','e','e','e','ee','ea','i','ie','o','ou','u');
  688. if(mt_rand(0,5) == 4)
  689. $vowels[] = 'y';
  690. $cons = array(
  691. 'b','bl','br',
  692. 'c','ch','cl','cr',
  693. 'd','dr',
  694. 'f','fl','fr',
  695. 'g','gh','gl','gr',
  696. 'h',
  697. 'j',
  698. 'k','kh','kl','kr',
  699. 'l',
  700. 'm',
  701. 'n',
  702. 'p','ph','pl','pr',
  703. 'qu',
  704. 'r','rh',
  705. 's','sc','sh','sm','sp','st',
  706. 't','th','tr',
  707. 'v',
  708. 'w','wh',
  709. 'x',
  710. 'z','zh'
  711. );
  712. $midcons = array('ck','ct','gn','ld','lf','lm','lt','mb','mm', 'mn','mp',
  713. 'nd','ng','nk','nt','rn','rp','rt');
  714. $noend = array('bl', 'br', 'cl','cr','dr','fl','fr','gl','gr',
  715. 'kh', 'kl','kr','mn','pl','pr','rh','tr','qu','wh');
  716. $start = mt_rand(0,2);
  717. if($start == 0)
  718. $table = $vowels;
  719. else
  720. $table = $cons;
  721. $word = '';
  722. for ($x = 0; $x < $len; $x ++) {
  723. $r = mt_rand(0,count($table) - 1);
  724. $word .= $table[$r];
  725. if($table == $vowels)
  726. $table = array_merge($cons,$midcons);
  727. else
  728. $table = $vowels;
  729. }
  730. $word = substr($word,0,$len);
  731. foreach($noend as $noe) {
  732. if((strlen($word) > 2) && (substr($word,-2) == $noe)) {
  733. $word = substr($word,0,-1);
  734. break;
  735. }
  736. }
  737. if(substr($word,-1) == 'q')
  738. $word = substr($word,0,-1);
  739. return $word;
  740. }}
  741. // Used to end the current process, after saving session state.
  742. if(! function_exists('killme')) {
  743. function killme() {
  744. session_write_close();
  745. exit;
  746. }}
  747. // redirect to another URL and terminate this process.
  748. if(! function_exists('goaway')) {
  749. function goaway($s) {
  750. header("Location: $s");
  751. killme();
  752. }}
  753. // Generic XML return
  754. // Outputs a basic dfrn XML status structure to STDOUT, with a <status> variable
  755. // of $st and an optional text <message> of $message and terminates the current process.
  756. if(! function_exists('xml_status')) {
  757. function xml_status($st, $message = '') {
  758. $xml_message = ((strlen($message)) ? "\t<message>" . xmlify($message) . "</message>\r\n" : '');
  759. if($st)
  760. logger('xml_status returning non_zero: ' . $st . " message=" . $message);
  761. header( "Content-type: text/xml" );
  762. echo '<?xml version="1.0" encoding="UTF-8"?>'."\r\n";
  763. echo "<result>\r\n\t<status>$st</status>\r\n$xml_message</result>\r\n";
  764. killme();
  765. }}
  766. // Returns the uid of locally logged in user or false.
  767. if(! function_exists('local_user')) {
  768. function local_user() {
  769. if((x($_SESSION,'authenticated')) && (x($_SESSION,'uid')))
  770. return intval($_SESSION['uid']);
  771. return false;
  772. }}
  773. // Returns contact id of authenticated site visitor or false
  774. if(! function_exists('remote_user')) {
  775. function remote_user() {
  776. if((x($_SESSION,'authenticated')) && (x($_SESSION,'visitor_id')))
  777. return intval($_SESSION['visitor_id']);
  778. return false;
  779. }}
  780. // contents of $s are displayed prominently on the page the next time
  781. // a page is loaded. Usually used for errors or alerts.
  782. if(! function_exists('notice')) {
  783. function notice($s) {
  784. $a = get_app();
  785. if($a->interactive)
  786. $_SESSION['sysmsg'] .= $s;
  787. }}
  788. // wrapper around config to limit the text length of an incoming message
  789. if(! function_exists('get_max_import_size')) {
  790. function get_max_import_size() {
  791. global $a;
  792. return ((x($a->config,'max_import_size')) ? $a->config['max_import_size'] : 0 );
  793. }}
  794. // escape text ($str) for XML transport
  795. // returns escaped text.
  796. if(! function_exists('xmlify')) {
  797. function xmlify($str) {
  798. $buffer = '';
  799. for($x = 0; $x < strlen($str); $x ++) {
  800. $char = $str[$x];
  801. switch( $char ) {
  802. case "\r" :
  803. break;
  804. case "&" :
  805. $buffer .= '&amp;';
  806. break;
  807. case "'" :
  808. $buffer .= '&apos;';
  809. break;
  810. case "\"" :
  811. $buffer .= '&quot;';
  812. break;
  813. case '<' :
  814. $buffer .= '&lt;';
  815. break;
  816. case '>' :
  817. $buffer .= '&gt;';
  818. break;
  819. case "\n" :
  820. $buffer .= "\n";
  821. break;
  822. default :
  823. $buffer .= $char;
  824. break;
  825. }
  826. }
  827. $buffer = trim($buffer);
  828. return($buffer);
  829. }}
  830. // undo an xmlify
  831. // pass xml escaped text ($s), returns unescaped text
  832. if(! function_exists('unxmlify')) {
  833. function unxmlify($s) {
  834. $ret = str_replace('&amp;','&', $s);
  835. $ret = str_replace(array('&lt;','&gt;','&quot;','&apos;'),array('<','>','"',"'"),$ret);
  836. return $ret;
  837. }}
  838. // convenience wrapper, reverse the operation "bin2hex"
  839. if(! function_exists('hex2bin')) {
  840. function hex2bin($s) {
  841. if(! ctype_xdigit($s)) {
  842. logger('hex2bin: illegal input: ' . print_r(debug_backtrace(), true));
  843. return($s);
  844. }
  845. return(pack("H*",$s));
  846. }}
  847. // Automatic pagination.
  848. // To use, get the count of total items.
  849. // Then call $a->set_pager_total($number_items);
  850. // Optionally call $a->set_pager_itemspage($n) to the number of items to display on each page
  851. // Then call paginate($a) after the end of the display loop to insert the pager block on the page
  852. // (assuming there are enough items to paginate).
  853. // When using with SQL, the setting LIMIT %d, %d => $a->pager['start'],$a->pager['itemspage']
  854. // will limit the results to the correct items for the current page.
  855. // The actual page handling is then accomplished at the application layer.
  856. if(! function_exists('paginate')) {
  857. function paginate(&$a) {
  858. $o = '';
  859. $stripped = preg_replace('/(&page=[0-9]*)/','',$a->query_string);
  860. $stripped = str_replace('q=','',$stripped);
  861. $stripped = trim($stripped,'/');
  862. $pagenum = $a->pager['page'];
  863. $url = $a->get_baseurl() . '/' . $stripped;
  864. if($a->pager['total'] > $a->pager['itemspage']) {
  865. $o .= '<div class="pager">';
  866. if($a->pager['page'] != 1)
  867. $o .= '<span class="pager_prev">'."<a href=\"$url".'&page='.($a->pager['page'] - 1).'">' . t('prev') . '</a></span> ';
  868. $o .= "<span class=\"pager_first\"><a href=\"$url"."&page=1\">" . t('first') . "</a></span> ";
  869. $numpages = $a->pager['total'] / $a->pager['itemspage'];
  870. $numstart = 1;
  871. $numstop = $numpages;
  872. if($numpages > 14) {
  873. $numstart = (($pagenum > 7) ? ($pagenum - 7) : 1);
  874. $numstop = (($pagenum > ($numpages - 7)) ? $numpages : ($numstart + 14));
  875. }
  876. for($i = $numstart; $i <= $numstop; $i++){
  877. if($i == $a->pager['page'])
  878. $o .= '<span class="pager_current">'.(($i < 10) ? '&nbsp;'.$i : $i);
  879. else
  880. $o .= "<span class=\"pager_n\"><a href=\"$url"."&page=$i\">".(($i < 10) ? '&nbsp;'.$i : $i)."</a>";
  881. $o .= '</span> ';
  882. }
  883. if(($a->pager['total'] % $a->pager['itemspage']) != 0) {
  884. if($i == $a->pager['page'])
  885. $o .= '<span class="pager_current">'.(($i < 10) ? '&nbsp;'.$i : $i);
  886. else
  887. $o .= "<span class=\"pager_n\"><a href=\"$url"."&page=$i\">".(($i < 10) ? '&nbsp;'.$i : $i)."</a>";
  888. $o .= '</span> ';
  889. }
  890. $lastpage = (($numpages > intval($numpages)) ? intval($numpages)+1 : $numpages);
  891. $o .= "<span class=\"pager_last\"><a href=\"$url"."&page=$lastpage\">" . t('last') . "</a></span> ";
  892. if(($a->pager['total'] - ($a->pager['itemspage'] * $a->pager['page'])) > 0)
  893. $o .= '<span class="pager_next">'."<a href=\"$url"."&page=".($a->pager['page'] + 1).'">' . t('next') . '</a></span>';
  894. $o .= '</div>'."\r\n";
  895. }
  896. return $o;
  897. }}
  898. // Turn user/group ACLs stored as angle bracketed text into arrays
  899. if(! function_exists('expand_acl')) {
  900. function expand_acl($s) {
  901. // turn string array of angle-bracketed elements into numeric array
  902. // e.g. "<1><2><3>" => array(1,2,3);
  903. $ret = array();
  904. if(strlen($s)) {
  905. $t = str_replace('<','',$s);
  906. $a = explode('>',$t);
  907. foreach($a as $aa) {
  908. if(intval($aa))
  909. $ret[] = intval($aa);
  910. }
  911. }
  912. return $ret;
  913. }}
  914. // Used to wrap ACL elements in angle brackets for storage
  915. if(! function_exists('sanitise_acl')) {
  916. function sanitise_acl(&$item) {
  917. if(intval($item))
  918. $item = '<' . intval(notags(trim($item))) . '>';
  919. else
  920. unset($item);
  921. }}
  922. // retrieve a "family" of config variables from database to cached storage
  923. if(! function_exists('load_config')) {
  924. function load_config($family) {
  925. global $a;
  926. $r = q("SELECT * FROM `config` WHERE `cat` = '%s'",
  927. dbesc($family)
  928. );
  929. if(count($r)) {
  930. foreach($r as $rr) {
  931. $k = $rr['k'];
  932. $a->config[$family][$k] = $rr['v'];
  933. }
  934. }
  935. }}
  936. // get a particular config variable given the family name
  937. // and key. Returns false if not set.
  938. // $instore is only used by the set_config function
  939. // to determine if the key already exists in the DB
  940. // If a key is found in the DB but doesn't exist in
  941. // local config cache, pull it into the cache so we don't have
  942. // to hit the DB again for this item.
  943. if(! function_exists('get_config')) {
  944. function get_config($family, $key, $instore = false) {
  945. global $a;
  946. if(! $instore) {
  947. if(isset($a->config[$family][$key])) {
  948. if($a->config[$family][$key] === '!<unset>!') {
  949. return false;
  950. }
  951. return $a->config[$family][$key];
  952. }
  953. }
  954. $ret = q("SELECT `v` FROM `config` WHERE `cat` = '%s' AND `k` = '%s' LIMIT 1",
  955. dbesc($family),
  956. dbesc($key)
  957. );
  958. if(count($ret)) {
  959. $a->config[$family][$key] = $ret[0]['v'];
  960. return $ret[0]['v'];
  961. }
  962. else {
  963. $a->config[$family][$key] = '!<unset>!';
  964. }
  965. return false;
  966. }}
  967. // Store a config value ($value) in the category ($family)
  968. // under the key ($key)
  969. // Return the value, or false if the database update failed
  970. if(! function_exists('set_config')) {
  971. function set_config($family,$key,$value) {
  972. global $a;
  973. if(get_config($family,$key,true) === false) {
  974. $ret = q("INSERT INTO `config` ( `cat`, `k`, `v` ) VALUES ( '%s', '%s', '%s' ) ",
  975. dbesc($family),
  976. dbesc($key),
  977. dbesc($value)
  978. );
  979. if($ret)
  980. return $value;
  981. return $ret;
  982. }
  983. $ret = q("UPDATE `config` SET `v` = '%s' WHERE `cat` = '%s' AND `k` = '%s' LIMIT 1",
  984. dbesc($value),
  985. dbesc($family),
  986. dbesc($key)
  987. );
  988. $a->config[$family][$key] = $value;
  989. if($ret)
  990. return $value;
  991. return $ret;
  992. }}
  993. if(! function_exists('load_pconfig')) {
  994. function load_pconfig($uid,$family) {
  995. global $a;
  996. $r = q("SELECT * FROM `pconfig` WHERE `cat` = '%s' AND `uid` = %d",
  997. dbesc($family),
  998. intval($uid)
  999. );
  1000. if(count($r)) {
  1001. foreach($r as $rr) {
  1002. $k = $rr['k'];
  1003. $a->config[$uid][$family][$k] = $rr['v'];
  1004. }
  1005. }
  1006. }}
  1007. if(! function_exists('get_pconfig')) {
  1008. function get_pconfig($uid,$family, $key, $instore = false) {
  1009. global $a;
  1010. if(! $instore) {
  1011. if(isset($a->config[$uid][$family][$key])) {
  1012. if($a->config[$uid][$family][$key] === '!<unset>!') {
  1013. return false;
  1014. }
  1015. return $a->config[$uid][$family][$key];
  1016. }
  1017. }
  1018. $ret = q("SELECT `v` FROM `pconfig` WHERE `uid` = %d AND `cat` = '%s' AND `k` = '%s' LIMIT 1",
  1019. intval($uid),
  1020. dbesc($family),
  1021. dbesc($key)
  1022. );
  1023. if(count($ret)) {
  1024. $a->config[$uid][$family][$key] = $ret[0]['v'];
  1025. return $ret[0]['v'];
  1026. }
  1027. else {
  1028. $a->config[$uid][$family][$key] = '!<unset>!';
  1029. }
  1030. return false;
  1031. }}
  1032. if(! function_exists('del_config')) {
  1033. function del_config($family,$key) {
  1034. global $a;
  1035. if(x($a->config[$family],$key))
  1036. unset($a->config[$family][$key]);
  1037. $ret = q("DELETE FROM `config` WHERE `cat` = '%s' AND `k` = '%s' LIMIT 1",
  1038. dbesc($cat),
  1039. dbesc($key)
  1040. );
  1041. return $ret;
  1042. }}
  1043. // Same as above functions except these are for personal config storage and take an
  1044. // additional $uid argument.
  1045. if(! function_exists('set_pconfig')) {
  1046. function set_pconfig($uid,$family,$key,$value) {
  1047. global $a;
  1048. if(get_pconfig($uid,$family,$key,true) === false) {
  1049. $ret = q("INSERT INTO `pconfig` ( `uid`, `cat`, `k`, `v` ) VALUES ( %d, '%s', '%s', '%s' ) ",
  1050. intval($uid),
  1051. dbesc($family),
  1052. dbesc($key),
  1053. dbesc($value)
  1054. );
  1055. if($ret)
  1056. return $value;
  1057. return $ret;
  1058. }
  1059. $ret = q("UPDATE `pconfig` SET `v` = '%s' WHERE `uid` = %d AND `cat` = '%s' AND `k` = '%s' LIMIT 1",
  1060. dbesc($value),
  1061. intval($uid),
  1062. dbesc($family),
  1063. dbesc($key)
  1064. );
  1065. $a->config[$uid][$family][$key] = $value;
  1066. if($ret)
  1067. return $value;
  1068. return $ret;
  1069. }}
  1070. if(! function_exists('del_pconfig')) {
  1071. function del_pconfig($uid,$family,$key) {
  1072. global $a;
  1073. if(x($a->config[$uid][$family],$key))
  1074. unset($a->config[$uid][$family][$key]);
  1075. $ret = q("DELETE FROM `pconfig` WHERE `uid` = %d AND `cat` = '%s' AND `k` = '%s' LIMIT 1",
  1076. intval($uid),
  1077. dbesc($family),
  1078. dbesc($key)
  1079. );
  1080. return $ret;
  1081. }}
  1082. // convert an XML document to a normalised, case-corrected array
  1083. // used by webfinger
  1084. if(! function_exists('convert_xml_element_to_array')) {
  1085. function convert_xml_element_to_array($xml_element, &$recursion_depth=0) {
  1086. // If we're getting too deep, bail out
  1087. if ($recursion_depth > 512) {
  1088. return(null);
  1089. }
  1090. if (!is_string($xml_element) &&
  1091. !is_array($xml_element) &&
  1092. (get_class($xml_element) == 'SimpleXMLElement')) {
  1093. $xml_element_copy = $xml_element;
  1094. $xml_element = get_object_vars($xml_element);
  1095. }
  1096. if (is_array($xml_element)) {
  1097. $result_array = array();
  1098. if (count($xml_element) <= 0) {
  1099. return (trim(strval($xml_element_copy)));
  1100. }
  1101. foreach($xml_element as $key=>$value) {
  1102. $recursion_depth++;
  1103. $result_array[strtolower($key)] =
  1104. convert_xml_element_to_array($value, $recursion_depth);
  1105. $recursion_depth--;
  1106. }
  1107. if ($recursion_depth == 0) {
  1108. $temp_array = $result_array;
  1109. $result_array = array(
  1110. strtolower($xml_element_copy->getName()) => $temp_array,
  1111. );
  1112. }
  1113. return ($result_array);
  1114. } else {
  1115. return (trim(strval($xml_element)));
  1116. }
  1117. }}
  1118. // Given an email style address, perform webfinger lookup and
  1119. // return the resulting DFRN profile URL, or if no DFRN profile URL
  1120. // is located, returns an OStatus subscription template (prefixed
  1121. // with the string 'stat:' to identify it as on OStatus template).
  1122. // If this isn't an email style address just return $s.
  1123. // Return an empty string if email-style addresses but webfinger fails,
  1124. // or if the resultant personal XRD doesn't contain a supported
  1125. // subscription/friend-request attribute.
  1126. if(! function_exists('webfinger_dfrn')) {
  1127. function webfinger_dfrn($s) {
  1128. if(! strstr($s,'@')) {
  1129. return $s;
  1130. }
  1131. $links = webfinger($s);
  1132. logger('webfinger_dfrn: ' . $s . ':' . print_r($links,true), LOGGER_DATA);
  1133. if(count($links)) {
  1134. foreach($links as $link)
  1135. if($link['@attributes']['rel'] === NAMESPACE_DFRN)
  1136. return $link['@attributes']['href'];
  1137. foreach($links as $link)
  1138. if($link['@attributes']['rel'] === NAMESPACE_OSTATUSSUB)
  1139. return 'stat:' . $link['@attributes']['template'];
  1140. }
  1141. return '';
  1142. }}
  1143. // Given an email style address, perform webfinger lookup and
  1144. // return the array of link attributes from the personal XRD file.
  1145. // On error/failure return an empty array.
  1146. if(! function_exists('webfinger')) {
  1147. function webfinger($s) {
  1148. $host = '';
  1149. if(strstr($s,'@')) {
  1150. $host = substr($s,strpos($s,'@') + 1);
  1151. }
  1152. if(strlen($host)) {
  1153. $tpl = fetch_lrdd_template($host);
  1154. logger('webfinger: lrdd template: ' . $tpl);
  1155. if(strlen($tpl)) {
  1156. $pxrd = str_replace('{uri}', urlencode('acct:' . $s), $tpl);
  1157. logger('webfinger: pxrd: ' . $pxrd);
  1158. $links = fetch_xrd_links($pxrd);
  1159. if(! count($links)) {
  1160. // try with double slashes
  1161. $pxrd = str_replace('{uri}', urlencode('acct://' . $s), $tpl);
  1162. logger('webfinger: pxrd: ' . $pxrd);
  1163. $links = fetch_xrd_links($pxrd);
  1164. }
  1165. return $links;
  1166. }
  1167. }
  1168. return array();
  1169. }}
  1170. if(! function_exists('lrdd')) {
  1171. function lrdd($uri) {
  1172. $a = get_app();
  1173. // default priority is host priority, host-meta first
  1174. $priority = 'host';
  1175. // All we have is an email address. Resource-priority is irrelevant
  1176. // because our URI isn't directly resolvable.
  1177. if(strstr($uri,'@')) {
  1178. return(webfinger($uri));
  1179. }
  1180. // get the host meta file
  1181. $host = @parse_url($uri);
  1182. if($host) {
  1183. $url = ((x($host,'scheme')) ? $host['scheme'] : 'http') . '://';
  1184. $url .= $host['host'] . '/.well-known/host-meta' ;
  1185. }
  1186. else
  1187. return array();
  1188. logger('lrdd: constructed url: ' . $url);
  1189. $xml = fetch_url($url);
  1190. $headers = $a->get_curl_headers();
  1191. if (! $xml)
  1192. return array();
  1193. logger('lrdd: host_meta: ' . $xml, LOGGER_DATA);
  1194. $h = parse_xml_string($xml);
  1195. $arr = convert_xml_element_to_array($h);
  1196. if(isset($arr['xrd']['property'])) {
  1197. $property = $arr['crd']['property'];
  1198. if(! isset($property[0]))
  1199. $properties = array($property);
  1200. else
  1201. $properties = $property;
  1202. foreach($properties as $prop)
  1203. if((string) $prop['@attributes'] === 'http://lrdd.net/priority/resource')
  1204. $priority = 'resource';
  1205. }
  1206. // save the links in case we need them
  1207. $links = array();
  1208. if(isset($arr['xrd']['link'])) {
  1209. $link = $arr['xrd']['link'];
  1210. if(! isset($link[0]))
  1211. $links = array($link);
  1212. else
  1213. $links = $link;
  1214. }
  1215. // do we have a template or href?
  1216. if(count($links)) {
  1217. foreach($links as $link) {
  1218. if($link['@attributes']['rel'] && attribute_contains($link['@attributes']['rel'],'lrdd')) {
  1219. if(x($link['@attributes'],'template'))
  1220. $tpl = $link['@attributes']['template'];
  1221. elseif(x($link['@attributes'],'href'))
  1222. $href = $link['@attributes']['href'];
  1223. }
  1224. }
  1225. }
  1226. if((! isset($tpl)) || (! strpos($tpl,'{uri}')))
  1227. $tpl = '';
  1228. if($priority === 'host') {
  1229. if(strlen($tpl))
  1230. $pxrd = str_replace('{uri}', urlencode($uri), $tpl);
  1231. elseif(isset($href))
  1232. $pxrd = $href;
  1233. if(isset($pxrd)) {
  1234. logger('lrdd: (host priority) pxrd: ' . $pxrd);
  1235. $links = fetch_xrd_links($pxrd);
  1236. return $links;
  1237. }
  1238. $lines = explode("\n",$headers);
  1239. if(count($lines)) {
  1240. foreach($lines as $line) {
  1241. if((stristr($line,'link:')) && preg_match('/<([^>].*)>.*rel\=[\'\"]lrdd[\'\"]/',$line,$matches)) {
  1242. return(fetch_xrd_links($matches[1]));
  1243. break;
  1244. }
  1245. }
  1246. }
  1247. }
  1248. // priority 'resource'
  1249. $html = fetch_url($uri);
  1250. $headers = $a->get_curl_headers();
  1251. logger('lrdd: headers=' . $headers, LOGGER_DEBUG);
  1252. // don't try and parse raw xml as html
  1253. if(! strstr($html,'<?xml')) {
  1254. require_once('library/HTML5/Parser.php');
  1255. $dom = @HTML5_Parser::parse($html);
  1256. if($dom) {
  1257. $items = $dom->getElementsByTagName('link');
  1258. foreach($items as $item) {
  1259. $x = $item->getAttribute('rel');
  1260. if($x == "lrdd") {
  1261. $pagelink = $item->getAttribute('href');
  1262. break;
  1263. }
  1264. }
  1265. }
  1266. }
  1267. if(isset($pagelink))
  1268. return(fetch_xrd_links($pagelink));
  1269. // next look in HTTP headers
  1270. $lines = explode("\n",$headers);
  1271. if(count($lines)) {
  1272. foreach($lines as $line) {
  1273. // TODO alter the following regex to support multiple relations (space separated)
  1274. if((stristr($line,'link:')) && preg_match('/<([^>].*)>.*rel\=[\'\"]lrdd[\'\"]/',$line,$matches)) {
  1275. $pagelink = $matches[1];
  1276. break;
  1277. }
  1278. // don't try and run feeds through the html5 parser
  1279. if(stristr($line,'content-type:') && ((stristr($line,'application/atom+xml')) || (stristr($line,'application/rss+xml'))))
  1280. return array();
  1281. if(stristr($html,'<rss') || stristr($html,'<feed'))
  1282. return array();
  1283. }
  1284. }
  1285. if(isset($pagelink))
  1286. return(fetch_xrd_links($pagelink));
  1287. // If we haven't found any links, return the host xrd links (which we have already fetched)
  1288. if(isset($links))
  1289. return $links;
  1290. return array();
  1291. }}
  1292. // Given a host name, locate the LRDD template from that
  1293. // host. Returns the LRDD template or an empty string on
  1294. // error/failure.
  1295. if(! function_exists('fetch_lrdd_template')) {
  1296. function fetch_lrdd_template($host) {
  1297. $tpl = '';
  1298. $url1 = 'https://' . $host . '/.well-known/host-meta' ;
  1299. $url2 = 'http://' . $host . '/.well-known/host-meta' ;
  1300. $links = fetch_xrd_links($url1);
  1301. logger('template (https): ' . print_r($links,true));
  1302. if(! count($links)) {
  1303. $links = fetch_xrd_links($url2);
  1304. logger('template (http): ' . print_r($links,true));
  1305. }
  1306. if(count($links)) {
  1307. foreach($links as $link)
  1308. if($link['@attributes']['rel'] && $link['@attributes']['rel'] === 'lrdd')
  1309. $tpl = $link['@attributes']['template'];
  1310. }
  1311. if(! strpos($tpl,'{uri}'))
  1312. $tpl = '';
  1313. return $tpl;
  1314. }}
  1315. // Given a URL, retrieve the page as an XRD document.
  1316. // Return an array of links.
  1317. // on error/failure return empty array.
  1318. if(! function_exists('fetch_xrd_links')) {
  1319. function fetch_xrd_links($url) {
  1320. $xml = fetch_url($url);
  1321. if (! $xml)
  1322. return array();
  1323. logger('fetch_xrd_links: ' . $xml, LOGGER_DATA);
  1324. $h = parse_xml_string($xml);
  1325. $arr = convert_xml_element_to_array($h);
  1326. $links = array();
  1327. if(isset($arr['xrd']['link'])) {
  1328. $link = $arr['xrd']['link'];
  1329. if(! isset($link[0]))
  1330. $links = array($link);
  1331. else
  1332. $links = $link;
  1333. }
  1334. if(isset($arr['xrd']['alias'])) {
  1335. $alias = $arr['xrd']['alias'];
  1336. if(! isset($alias[0]))
  1337. $aliases = array($alias);
  1338. else
  1339. $aliases = $alias;
  1340. foreach($aliases as $alias) {
  1341. $links[]['@attributes'] = array('rel' => 'alias' , 'href' => $alias);
  1342. }
  1343. }
  1344. logger('fetch_xrd_links: ' . print_r($links,true), LOGGER_DATA);
  1345. return $links;
  1346. }}
  1347. // Convert an ACL array to a storable string
  1348. if(! function_exists('perms2str')) {
  1349. function perms2str($p) {
  1350. $ret = '';
  1351. $tmp = $p;
  1352. if(is_array($tmp)) {
  1353. array_walk($tmp,'sanitise_acl');
  1354. $ret = implode('',$tmp);
  1355. }
  1356. return $ret;
  1357. }}
  1358. // generate a guaranteed unique (for this domain) item ID for ATOM
  1359. // safe from birthday paradox
  1360. if(! function_exists('item_new_uri')) {
  1361. function item_new_uri($hostname,$uid) {
  1362. do {</