3 * StatusNet - the distributed open-source microblogging tool
4 * Copyright (C) 2008, 2009, StatusNet, Inc.
6 * This program is free software: you can redistribute it and/or modify
7 * it under the terms of the GNU Affero General Public License as published by
8 * the Free Software Foundation, either version 3 of the License, or
9 * (at your option) any later version.
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 Affero General Public License for more details.
16 * You should have received a copy of the GNU Affero General Public License
17 * along with this program. If not, see <http://www.gnu.org/licenses/>.
20 /* XXX: break up into separate modules (HTTP, user, files) */
23 * Show a server error.
25 function common_server_error($msg, $code=500)
27 $err = new ServerErrorAction($msg, $code);
34 function common_user_error($msg, $code=400)
36 $err = new ClientErrorAction($msg, $code);
41 * This should only be used at setup; processes switching languages
42 * to send text to other users should use common_switch_locale().
44 * @param string $language Locale language code (optional; empty uses
45 * current user's preference or site default)
46 * @return mixed success
48 function common_init_locale($language=null)
51 $language = common_language();
53 putenv('LANGUAGE='.$language);
54 putenv('LANG='.$language);
55 $ok = setlocale(LC_ALL, $language . ".utf8",
65 * Initialize locale and charset settings and gettext with our message catalog,
66 * using the current user's language preference or the site default.
68 * This should generally only be run at framework initialization; code switching
69 * languages at runtime should call common_switch_language().
73 function common_init_language()
75 mb_internal_encoding('UTF-8');
77 // Note that this setlocale() call may "fail" but this is harmless;
78 // gettext will still select the right language.
79 $language = common_language();
80 $locale_set = common_init_locale($language);
83 // The requested locale doesn't exist on the system.
85 // gettext seems very picky... We first need to setlocale()
86 // to a locale which _does_ exist on the system, and _then_
87 // we can set in another locale that may not be set up
88 // (say, ga_ES for Galego/Galician) it seems to take it.
90 // For some reason C and POSIX which are guaranteed to work
91 // don't do the job. en_US.UTF-8 should be there most of the
92 // time, but not guaranteed.
93 $ok = common_init_locale("en_US");
94 if (!$ok && strtolower(substr(PHP_OS, 0, 3)) != 'win') {
95 // Try to find a complete, working locale on Unix/Linux...
96 // @fixme shelling out feels awfully inefficient
97 // but I don't think there's a more standard way.
99 foreach (explode("\n", $all) as $locale) {
100 if (preg_match('/\.utf[-_]?8$/i', $locale)) {
101 $ok = setlocale(LC_ALL, $locale);
109 common_log(LOG_ERR, "Unable to find a UTF-8 locale on this system; UI translations may not work.");
111 $locale_set = common_init_locale($language);
114 common_init_gettext();
120 function common_init_gettext()
122 setlocale(LC_CTYPE, 'C');
123 // So we do not have to make people install the gettext locales
124 $path = common_config('site','locale_path');
125 bindtextdomain("statusnet", $path);
126 bind_textdomain_codeset("statusnet", "UTF-8");
127 textdomain("statusnet");
131 * Switch locale during runtime, and poke gettext until it cries uncle.
132 * Otherwise, sometimes it doesn't actually switch away from the old language.
134 * @param string $language code for locale ('en', 'fr', 'pt_BR' etc)
136 function common_switch_locale($language=null)
138 common_init_locale($language);
140 setlocale(LC_CTYPE, 'C');
141 // So we do not have to make people install the gettext locales
142 $path = common_config('site','locale_path');
143 bindtextdomain("statusnet", $path);
144 bind_textdomain_codeset("statusnet", "UTF-8");
145 textdomain("statusnet");
148 function common_timezone()
150 if (common_logged_in()) {
151 $user = common_current_user();
152 if ($user->timezone) {
153 return $user->timezone;
157 return common_config('site', 'timezone');
160 function common_language()
162 // If there is a user logged in and they've set a language preference
163 // then return that one...
164 if (_have_config() && common_logged_in()) {
165 $user = common_current_user();
166 $user_language = $user->language;
168 if ($user->language) {
169 // Validate -- we don't want to end up with a bogus code
170 // left over from some old junk.
171 foreach (common_config('site', 'languages') as $code => $info) {
172 if ($info['lang'] == $user_language) {
173 return $user_language;
179 // Otherwise, find the best match for the languages requested by the
181 if (common_config('site', 'langdetect')) {
182 $httplang = isset($_SERVER['HTTP_ACCEPT_LANGUAGE']) ? $_SERVER['HTTP_ACCEPT_LANGUAGE'] : null;
183 if (!empty($httplang)) {
184 $language = client_prefered_language($httplang);
190 // Finally, if none of the above worked, use the site's default...
191 return common_config('site', 'language');
195 * Salted, hashed passwords are stored in the DB.
197 function common_munge_password($password, $id)
199 if (is_object($id) || is_object($password)) {
200 $e = new Exception();
201 common_log(LOG_ERR, __METHOD__ . ' object in param to common_munge_password ' .
202 str_replace("\n", " ", $e->getTraceAsString()));
204 return md5($password . $id);
208 * Check if a username exists and has matching password.
210 function common_check_user($nickname, $password)
212 // empty nickname always unacceptable
213 if (empty($nickname)) {
217 $authenticatedUser = false;
219 if (Event::handle('StartCheckPassword', array($nickname, $password, &$authenticatedUser))) {
220 $user = User::staticGet('nickname', common_canonical_nickname($nickname));
222 if (!empty($password)) { // never allow login with blank password
223 if (0 == strcmp(common_munge_password($password, $user->id),
225 //internal checking passed
226 $authenticatedUser = $user;
230 Event::handle('EndCheckPassword', array($nickname, $password, $authenticatedUser));
233 return $authenticatedUser;
237 * Is the current user logged in?
239 function common_logged_in()
241 return (!is_null(common_current_user()));
244 function common_have_session()
246 return (0 != strcmp(session_id(), ''));
249 function common_ensure_session()
252 if (array_key_exists(session_name(), $_COOKIE)) {
253 $c = $_COOKIE[session_name()];
255 if (!common_have_session()) {
256 if (common_config('sessions', 'handle')) {
257 Session::setSaveHandler();
259 if (array_key_exists(session_name(), $_GET)) {
260 $id = $_GET[session_name()];
261 } else if (array_key_exists(session_name(), $_COOKIE)) {
262 $id = $_COOKIE[session_name()];
268 if (!isset($_SESSION['started'])) {
269 $_SESSION['started'] = time();
271 common_log(LOG_WARNING, 'Session cookie "' . $_COOKIE[session_name()] . '" ' .
272 ' is set but started value is null');
278 // Three kinds of arguments:
283 // Initialize to false; set to null if none found
286 function common_set_user($user)
290 if (is_null($user) && common_have_session()) {
292 unset($_SESSION['userid']);
294 } else if (is_string($user)) {
296 $user = User::staticGet('nickname', $nickname);
297 } else if (!($user instanceof User)) {
302 if (Event::handle('StartSetUser', array(&$user))) {
304 common_ensure_session();
305 $_SESSION['userid'] = $user->id;
307 Event::handle('EndSetUser', array($user));
315 function common_set_cookie($key, $value, $expiration=0)
317 $path = common_config('site', 'path');
318 $server = common_config('site', 'server');
320 if ($path && ($path != '/')) {
321 $cookiepath = '/' . $path . '/';
325 return setcookie($key,
330 common_config('site', 'ssl')=='always');
333 define('REMEMBERME', 'rememberme');
334 define('REMEMBERME_EXPIRY', 30 * 24 * 60 * 60); // 30 days
336 function common_rememberme($user=null)
339 $user = common_current_user();
345 $rm = new Remember_me();
347 $rm->code = common_good_rand(16);
348 $rm->user_id = $user->id;
350 // Wrap the insert in some good ol' fashioned transaction code
354 $result = $rm->insert();
357 common_log_db_error($rm, 'INSERT', __FILE__);
361 $rm->query('COMMIT');
363 $cookieval = $rm->user_id . ':' . $rm->code;
365 common_log(LOG_INFO, 'adding rememberme cookie "' . $cookieval . '" for ' . $user->nickname);
367 common_set_cookie(REMEMBERME, $cookieval, time() + REMEMBERME_EXPIRY);
372 function common_remembered_user()
376 $packed = isset($_COOKIE[REMEMBERME]) ? $_COOKIE[REMEMBERME] : null;
382 list($id, $code) = explode(':', $packed);
384 if (!$id || !$code) {
385 common_log(LOG_WARNING, 'Malformed rememberme cookie: ' . $packed);
390 $rm = Remember_me::staticGet($code);
393 common_log(LOG_WARNING, 'No such remember code: ' . $code);
398 if ($rm->user_id != $id) {
399 common_log(LOG_WARNING, 'Rememberme code for wrong user: ' . $rm->user_id . ' != ' . $id);
404 $user = User::staticGet($rm->user_id);
407 common_log(LOG_WARNING, 'No such user for rememberme: ' . $rm->user_id);
413 $result = $rm->delete();
416 common_log_db_error($rm, 'DELETE', __FILE__);
417 common_log(LOG_WARNING, 'Could not delete rememberme: ' . $code);
422 common_log(LOG_INFO, 'logging in ' . $user->nickname . ' using rememberme code ' . $rm->code);
424 common_set_user($user);
425 common_real_login(false);
427 // We issue a new cookie, so they can log in
428 // automatically again after this session
430 common_rememberme($user);
436 * must be called with a valid user!
438 function common_forgetme()
440 common_set_cookie(REMEMBERME, '', 0);
444 * Who is the current user?
446 function common_current_user()
450 if (!_have_config()) {
454 if ($_cur === false) {
456 if (isset($_COOKIE[session_name()]) || isset($_GET[session_name()])
457 || (isset($_SESSION['userid']) && $_SESSION['userid'])) {
458 common_ensure_session();
459 $id = isset($_SESSION['userid']) ? $_SESSION['userid'] : false;
461 $user = User::staticGet($id);
469 // that didn't work; try to remember; will init $_cur to null on failure
470 $_cur = common_remembered_user();
473 // XXX: Is this necessary?
474 $_SESSION['userid'] = $_cur->id;
482 * Logins that are 'remembered' aren't 'real' -- they're subject to
483 * cookie-stealing. So, we don't let them do certain things. New reg,
484 * OpenID, and password logins _are_ real.
486 function common_real_login($real=true)
488 common_ensure_session();
489 $_SESSION['real_login'] = $real;
492 function common_is_real_login()
494 return common_logged_in() && $_SESSION['real_login'];
498 * Get a hash portion for HTTP caching Etags and such including
499 * info on the current user's session. If login/logout state changes,
500 * or we've changed accounts, or we've renamed the current user,
501 * we'll get a new hash value.
503 * This should not be considered secure information.
505 * @param User $user (optional; uses common_current_user() if left out)
508 function common_user_cache_hash($user=false)
510 if ($user === false) {
511 $user = common_current_user();
514 return crc32($user->id . ':' . $user->nickname);
521 * get canonical version of nickname for comparison
523 * @param string $nickname
526 * @throws NicknameException on invalid input
527 * @deprecated call Nickname::normalize() directly.
529 function common_canonical_nickname($nickname)
531 return Nickname::normalize($nickname);
535 * get canonical version of email for comparison
537 * @fixme actually normalize
538 * @fixme reject invalid input
540 * @param string $email
543 function common_canonical_email($email)
545 // XXX: canonicalize UTF-8
546 // XXX: lcase the domain part
551 * Partial notice markup rendering step: build links to !group references.
553 * @param string $text partially rendered HTML
554 * @param Notice $notice in whose context we're working
555 * @return string partially rendered HTML
557 function common_render_content($text, $notice)
559 $r = common_render_text($text);
560 $id = $notice->profile_id;
561 $r = common_linkify_mentions($r, $notice);
562 $r = preg_replace('/(^|[\s\.\,\:\;]+)!(' . Nickname::DISPLAY_FMT . ')/e',
563 "'\\1!'.common_group_link($id, '\\2')", $r);
568 * Finds @-mentions within the partially-rendered text section and
569 * turns them into live links.
571 * Should generally not be called except from common_render_content().
573 * @param string $text partially-rendered HTML
574 * @param Notice $notice in-progress or complete Notice object for context
575 * @return string partially-rendered HTML
577 function common_linkify_mentions($text, $notice)
579 $mentions = common_find_mentions($text, $notice);
581 // We need to go through in reverse order by position,
582 // so our positions stay valid despite our fudging with the
587 foreach ($mentions as $mention)
589 $points[$mention['position']] = $mention;
594 foreach ($points as $position => $mention) {
596 $linkText = common_linkify_mention($mention);
598 $text = substr_replace($text, $linkText, $position, mb_strlen($mention['text']));
604 function common_linkify_mention($mention)
608 if (Event::handle('StartLinkifyMention', array($mention, &$output))) {
610 $xs = new XMLStringer(false);
612 $attrs = array('href' => $mention['url'],
615 if (!empty($mention['title'])) {
616 $attrs['title'] = $mention['title'];
619 $xs->elementStart('span', 'vcard');
620 $xs->elementStart('a', $attrs);
621 $xs->element('span', 'fn nickname', $mention['text']);
622 $xs->elementEnd('a');
623 $xs->elementEnd('span');
625 $output = $xs->getString();
627 Event::handle('EndLinkifyMention', array($mention, &$output));
634 * Find @-mentions in the given text, using the given notice object as context.
635 * References will be resolved with common_relative_profile() against the user
636 * who posted the notice.
638 * Note the return data format is internal, to be used for building links and
639 * such. Should not be used directly; rather, call common_linkify_mentions().
641 * @param string $text
642 * @param Notice $notice notice in whose context we're building links
648 function common_find_mentions($text, $notice)
652 $sender = Profile::staticGet('id', $notice->profile_id);
654 if (empty($sender)) {
658 if (Event::handle('StartFindMentions', array($sender, $text, &$mentions))) {
659 // Get the context of the original notice, if any
660 $originalAuthor = null;
661 $originalNotice = null;
662 $originalMentions = array();
666 if (!empty($notice) && !empty($notice->reply_to)) {
667 $originalNotice = Notice::staticGet('id', $notice->reply_to);
668 if (!empty($originalNotice)) {
669 $originalAuthor = Profile::staticGet('id', $originalNotice->profile_id);
671 $ids = $originalNotice->getReplies();
673 foreach ($ids as $id) {
674 $repliedTo = Profile::staticGet('id', $id);
675 if (!empty($repliedTo)) {
676 $originalMentions[$repliedTo->nickname] = $repliedTo;
682 $matches = common_find_mentions_raw($text);
684 foreach ($matches as $match) {
686 $nickname = Nickname::normalize($match[0]);
687 } catch (NicknameException $e) {
688 // Bogus match? Drop it.
692 // Try to get a profile for this nickname.
693 // Start with conversation context, then go to
696 if (!empty($originalAuthor) && $originalAuthor->nickname == $nickname) {
697 $mentioned = $originalAuthor;
698 } else if (!empty($originalMentions) &&
699 array_key_exists($nickname, $originalMentions)) {
700 $mentioned = $originalMentions[$nickname];
702 $mentioned = common_relative_profile($sender, $nickname);
705 if (!empty($mentioned)) {
706 $user = User::staticGet('id', $mentioned->id);
709 $url = common_local_url('userbyid', array('id' => $user->id));
711 $url = $mentioned->profileurl;
714 $mention = array('mentioned' => array($mentioned),
716 'position' => $match[1],
719 if (!empty($mentioned->fullname)) {
720 $mention['title'] = $mentioned->fullname;
723 $mentions[] = $mention;
727 // @#tag => mention of all subscriptions tagged 'tag'
729 preg_match_all('/(?:^|[\s\.\,\:\;]+)@#([\pL\pN_\-\.]{1,64})/',
732 PREG_OFFSET_CAPTURE);
734 foreach ($hmatches[1] as $hmatch) {
736 $tag = common_canonical_tag($hmatch[0]);
738 $tagged = Profile_tag::getTagged($sender->id, $tag);
740 $url = common_local_url('subscriptions',
741 array('nickname' => $sender->nickname,
744 $mentions[] = array('mentioned' => $tagged,
745 'text' => $hmatch[0],
746 'position' => $hmatch[1],
750 Event::handle('EndFindMentions', array($sender, $text, &$mentions));
757 * Does the actual regex pulls to find @-mentions in text.
758 * Should generally not be called directly; for use in common_find_mentions.
760 * @param string $text
761 * @return array of PCRE match arrays
763 function common_find_mentions_raw($text)
766 preg_match_all('/^T (' . Nickname::DISPLAY_FMT . ') /',
769 PREG_OFFSET_CAPTURE);
771 $atmatches = array();
772 preg_match_all('/(?:^|\s+)@(' . Nickname::DISPLAY_FMT . ')\b/',
775 PREG_OFFSET_CAPTURE);
777 $matches = array_merge($tmatches[1], $atmatches[1]);
781 function common_render_text($text)
783 $r = htmlspecialchars($text);
785 $r = preg_replace('/[\x{0}-\x{8}\x{b}-\x{c}\x{e}-\x{19}]/', '', $r);
786 $r = common_replace_urls_callback($r, 'common_linkify');
787 $r = preg_replace('/(^|\"\;|\'|\(|\[|\{|\s+)#([\pL\pN_\-\.]{1,64})/e', "'\\1#'.common_tag_link('\\2')", $r);
793 * Find links in the given text and pass them to the given callback function.
795 * @param string $text
796 * @param function($text, $arg) $callback: return replacement text
797 * @param mixed $arg: optional argument will be passed on to the callback
799 function common_replace_urls_callback($text, $callback, $arg = null) {
800 // Start off with a regex
802 '(?:^|[\s\<\>\(\)\[\]\{\}\\\'\\\";]+)(?![\@\!\#])'.
805 '(?:'. //Known protocols
807 '(?:(?:https?|ftps?|mms|rtsp|gopher|news|nntp|telnet|wais|file|prospero|webcal|irc)://)'.
809 '(?:(?:mailto|aim|tel|xmpp):)'.
811 '(?:[\pN\pL\-\_\+\%\~]+(?::[\pN\pL\-\_\+\%\~]+)?\@)?'. //user:pass@
814 '\[[\pN\pL\-\_\:\.]+(?<![\.\:])\]'. //[dns]
816 '[\pN\pL\-\_\:\.]+(?<![\.\:])'. //dns
820 '|(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)'. //IPv4
822 '\[?(?:(?:(?:[0-9A-Fa-f]{1,4}:){7}(?:(?:[0-9A-Fa-f]{1,4})|:))|(?:(?:[0-9A-Fa-f]{1,4}:){6}(?::|(?:(?:25[0-5]|2[0-4]\d|[01]?\d{1,2})(?:\.(?:25[0-5]|2[0-4]\d|[01]?\d{1,2})){3})|(?::[0-9A-Fa-f]{1,4})))|(?:(?:[0-9A-Fa-f]{1,4}:){5}(?:(?::(?:(?:25[0-5]|2[0-4]\d|[01]?\d{1,2})(?:\.(?:25[0-5]|2[0-4]\d|[01]?\d{1,2})){3})?)|(?:(?::[0-9A-Fa-f]{1,4}){1,2})))|(?:(?:[0-9A-Fa-f]{1,4}:){4}(?::[0-9A-Fa-f]{1,4}){0,1}(?:(?::(?:(?:25[0-5]|2[0-4]\d|[01]?\d{1,2})(?:\.(?:25[0-5]|2[0-4]\d|[01]?\d{1,2})){3})?)|(?:(?::[0-9A-Fa-f]{1,4}){1,2})))|(?:(?:[0-9A-Fa-f]{1,4}:){3}(?::[0-9A-Fa-f]{1,4}){0,2}(?:(?::(?:(?:25[0-5]|2[0-4]\d|[01]?\d{1,2})(?:\.(?:25[0-5]|2[0-4]\d|[01]?\d{1,2})){3})?)|(?:(?::[0-9A-Fa-f]{1,4}){1,2})))|(?:(?:[0-9A-Fa-f]{1,4}:){2}(?::[0-9A-Fa-f]{1,4}){0,3}(?:(?::(?:(?:25[0-5]|2[0-4]\d|[01]?\d{1,2})(?:\.(?:25[0-5]|2[0-4]\d|[01]?\d{1,2})){3})?)|(?:(?::[0-9A-Fa-f]{1,4}){1,2})))|(?:(?:[0-9A-Fa-f]{1,4}:)(?::[0-9A-Fa-f]{1,4}){0,4}(?:(?::(?:(?:25[0-5]|2[0-4]\d|[01]?\d{1,2})(?:\.(?:25[0-5]|2[0-4]\d|[01]?\d{1,2})){3})?)|(?:(?::[0-9A-Fa-f]{1,4}){1,2})))|(?::(?::[0-9A-Fa-f]{1,4}){0,5}(?:(?::(?:(?:25[0-5]|2[0-4]\d|[01]?\d{1,2})(?:\.(?:25[0-5]|2[0-4]\d|[01]?\d{1,2})){3})?)|(?:(?::[0-9A-Fa-f]{1,4}){1,2})))|(?:(?:(?:25[0-5]|2[0-4]\d|[01]?\d{1,2})(?:\.(?:25[0-5]|2[0-4]\d|[01]?\d{1,2})){3})))\]?(?<!:)'.
824 '(?:[\pN\pL\-\_\+\%\~]+(?:\:[\pN\pL\-\_\+\%\~]+)?\@)?'. //user:pass@
825 '[\pN\pL\-\_]+(?:\.[\pN\pL\-\_]+)*\.'.
826 //tld list from http://data.iana.org/TLD/tlds-alpha-by-domain.txt, also added local, loc, and onion
827 '(?:AC|AD|AE|AERO|AF|AG|AI|AL|AM|AN|AO|AQ|AR|ARPA|AS|ASIA|AT|AU|AW|AX|AZ|BA|BB|BD|BE|BF|BG|BH|BI|BIZ|BJ|BM|BN|BO|BR|BS|BT|BV|BW|BY|BZ|CA|CAT|CC|CD|CF|CG|CH|CI|CK|CL|CM|CN|CO|COM|COOP|CR|CU|CV|CX|CY|CZ|DE|DJ|DK|DM|DO|DZ|EC|EDU|EE|EG|ER|ES|ET|EU|FI|FJ|FK|FM|FO|FR|GA|GB|GD|GE|GF|GG|GH|GI|GL|GM|GN|GOV|GP|GQ|GR|GS|GT|GU|GW|GY|HK|HM|HN|HR|HT|HU|ID|IE|IL|IM|IN|INFO|INT|IO|IQ|IR|IS|IT|JE|JM|JO|JOBS|JP|KE|KG|KH|KI|KM|KN|KP|KR|KW|KY|KZ|LA|LB|LC|LI|LK|LR|LS|LT|LU|LV|LY|MA|MC|MD|ME|MG|MH|MIL|MK|ML|MM|MN|MO|MOBI|MP|MQ|MR|MS|MT|MU|MUSEUM|MV|MW|MX|MY|MZ|NA|NAME|NC|NE|NET|NF|NG|NI|NL|NO|NP|NR|NU|NZ|OM|ORG|PA|PE|PF|PG|PH|PK|PL|PM|PN|PR|PRO|PS|PT|PW|PY|QA|RE|RO|RS|RU|RW|SA|SB|SC|SD|SE|SG|SH|SI|SJ|SK|SL|SM|SN|SO|SR|ST|SU|SV|SY|SZ|TC|TD|TEL|TF|TG|TH|TJ|TK|TL|TM|TN|TO|TP|TR|TRAVEL|TT|TV|TW|TZ|UA|UG|UK|US|UY|UZ|VA|VC|VE|VG|VI|VN|VU|WF|WS|XN--0ZWM56D|测试|XN--11B5BS3A9AJ6G|परीक्षा|XN--80AKHBYKNJ4F|испытание|XN--9T4B11YI5A|테스트|XN--DEBA0AD|טעסט|XN--G6W251D|測試|XN--HGBK6AJ7F53BBA|آزمایشی|XN--HLCJ6AYA9ESC7A|பரிட்சை|XN--JXALPDLP|δοκιμή|XN--KGBECHTV|إختبار|XN--ZCKZAH|テスト|YE|YT|YU|ZA|ZM|ZW|local|loc|onion)'.
831 '(?:\:\d+)?'. //:port
832 '(?:/[\pN\pL$\,\!\(\)\.\:\-\_\+\/\=\&\;\%\~\*\$\+\'@]*)?'. // /path
833 '(?:\?[\pN\pL\$\,\!\(\)\.\:\-\_\+\/\=\&\;\%\~\*\$\+\'@\/]*)?'. // ?query string
834 '(?:\#[\pN\pL$\,\!\(\)\.\:\-\_\+\/\=\&\;\%\~\*\$\+\'\@/\?\#]*)?'. // #fragment
835 ')(?<![\?\.\,\#\,])'.
838 //preg_match_all($regex,$text,$matches);
840 return preg_replace_callback($regex, curry('callback_helper',$callback,$arg) ,$text);
844 * Intermediate callback for common_replace_links(), helps resolve some
845 * ambiguous link forms before passing on to the final callback.
847 * @param array $matches
848 * @param callable $callback
849 * @param mixed $arg optional argument to pass on as second param to callback
854 function callback_helper($matches, $callback, $arg=null) {
856 $left = strpos($matches[0],$url);
857 $right = $left+strlen($url);
859 $groupSymbolSets=array(
877 $cannotEndWith=array('.','?',',','#');
881 foreach($groupSymbolSets as $groupSymbolSet){
882 if(substr($url,-1)==$groupSymbolSet['right']){
883 $group_left_count = substr_count($url,$groupSymbolSet['left']);
884 $group_right_count = substr_count($url,$groupSymbolSet['right']);
885 if($group_left_count<$group_right_count){
887 $url=substr($url,0,-1);
891 if(in_array(substr($url,-1),$cannotEndWith)){
893 $url=substr($url,0,-1);
895 }while($original_url!=$url);
897 $result = call_user_func_array($callback, array($url, $arg));
898 return substr($matches[0],0,$left) . $result . substr($matches[0],$right);
901 if (version_compare(PHP_VERSION, '5.3.0', 'ge')) {
902 // lambda implementation in a separate file; PHP 5.2 won't parse it.
903 require_once INSTALLDIR . "/lib/curry.php";
905 function curry($fn) {
906 $args = func_get_args();
908 $id = uniqid('_partial');
909 $GLOBALS[$id] = array($fn, $args);
910 return create_function('',
911 '$args = func_get_args(); '.
912 'return call_user_func_array('.
913 '$GLOBALS["'.$id.'"][0],'.
916 '$GLOBALS["'.$id.'"][1]));');
920 function common_linkify($url) {
921 // It comes in special'd, so we unspecial it before passing to the stringifying
923 $url = htmlspecialchars_decode($url);
925 if (strpos($url, '@') !== false && strpos($url, ':') === false && Validate::email($url)) {
926 //url is an email address without the mailto: protocol
927 $canon = "mailto:$url";
928 $longurl = "mailto:$url";
931 $canon = File_redirection::_canonUrl($url);
933 $longurl_data = File_redirection::where($canon, common_config('attachments', 'process_links'));
934 if (is_array($longurl_data)) {
935 $longurl = $longurl_data['url'];
936 } elseif (is_string($longurl_data)) {
937 $longurl = $longurl_data;
939 // Unable to reach the server to verify contents, etc
940 // Just pass the link on through for now.
941 common_log(LOG_ERR, "Can't linkify url '$url'");
946 $attrs = array('href' => $canon, 'title' => $longurl);
948 $is_attachment = false;
949 $attachment_id = null;
952 // Check to see whether this is a known "attachment" URL.
954 $f = File::staticGet('url', $longurl);
957 if (common_config('attachments', 'process_links')) {
958 // XXX: this writes to the database. :<
959 $f = File::processNew($longurl);
964 if ($f->getEnclosure()) {
965 $is_attachment = true;
966 $attachment_id = $f->id;
968 $thumb = File_thumbnail::staticGet('file_id', $f->id);
969 if (!empty($thumb)) {
976 if ($is_attachment) {
977 $attrs['class'] = 'attachment';
979 $attrs['class'] = 'attachment thumbnail';
981 $attrs['id'] = "attachment-{$attachment_id}";
984 // Whether to nofollow
986 $nf = common_config('nofollow', 'external');
988 if ($nf == 'never') {
989 $attrs['rel'] = 'external';
991 $attrs['rel'] = 'nofollow external';
994 return XMLStringer::estring('a', $attrs, $url);
998 * Find and shorten links in a given chunk of text if it's longer than the
999 * configured notice content limit (or unconditionally).
1001 * Side effects: may save file and file_redirection records for referenced URLs.
1003 * Pass the $user option or call $user->shortenLinks($text) to ensure the proper
1004 * user's options are used; otherwise the current web session user's setitngs
1005 * will be used or ur1.ca if there is no active web login.
1007 * @param string $text
1008 * @param boolean $always (optional)
1009 * @param User $user (optional)
1013 function common_shorten_links($text, $always = false, User $user=null)
1015 $maxLength = Notice::maxContent();
1016 if (!$always && ($maxLength == 0 || mb_strlen($text) <= $maxLength)) return $text;
1017 return common_replace_urls_callback($text, array('File_redirection', 'makeShort'), $user);
1021 * Very basic stripping of invalid UTF-8 input text.
1023 * @param string $str
1024 * @return mixed string or null if invalid input
1026 * @todo ideally we should drop bad chars, and maybe do some of the checks
1027 * from common_xml_safe_str. But we can't strip newlines, etc.
1028 * @todo Unicode normalization might also be useful, but not needed now.
1030 function common_validate_utf8($str)
1032 // preg_replace will return NULL on invalid UTF-8 input.
1034 // Note: empty regex //u also caused NULL return on some
1035 // production machines, but none of our test machines.
1037 // This should be replaced with a more reliable check.
1038 return preg_replace('/\x00/u', '', $str);
1042 * Make sure an arbitrary string is safe for output in XML as a single line.
1044 * @param string $str
1047 function common_xml_safe_str($str)
1049 // Replace common eol and extra whitespace input chars
1054 "\0", // null byte eos
1055 "\x0B" // vertical tab
1058 $replacement = array(
1059 ' ', // single space
1066 $str = str_replace($unWelcome, $replacement, $str);
1068 // Neutralize any additional control codes and UTF-16 surrogates
1069 // (Twitter uses '*')
1070 return preg_replace('/[\p{Cc}\p{Cs}]/u', '*', $str);
1073 function common_tag_link($tag)
1075 $canonical = common_canonical_tag($tag);
1076 if (common_config('singleuser', 'enabled')) {
1077 // regular TagAction isn't set up in 1user mode
1078 $nickname = User::singleUserNickname();
1079 $url = common_local_url('showstream',
1080 array('nickname' => $nickname,
1081 'tag' => $canonical));
1083 $url = common_local_url('tag', array('tag' => $canonical));
1085 $xs = new XMLStringer();
1086 $xs->elementStart('span', 'tag');
1087 $xs->element('a', array('href' => $url,
1090 $xs->elementEnd('span');
1091 return $xs->getString();
1094 function common_canonical_tag($tag)
1096 $tag = mb_convert_case($tag, MB_CASE_LOWER, "UTF-8");
1097 return str_replace(array('-', '_', '.'), '', $tag);
1100 function common_valid_profile_tag($str)
1102 return preg_match('/^[A-Za-z0-9_\-\.]{1,64}$/', $str);
1107 * @param <type> $sender_id
1108 * @param <type> $nickname
1112 function common_group_link($sender_id, $nickname)
1114 $sender = Profile::staticGet($sender_id);
1115 $group = User_group::getForNickname($nickname, $sender);
1116 if ($sender && $group && $sender->isMember($group)) {
1117 $attrs = array('href' => $group->permalink(),
1119 if (!empty($group->fullname)) {
1120 $attrs['title'] = $group->getFancyName();
1122 $xs = new XMLStringer();
1123 $xs->elementStart('span', 'vcard');
1124 $xs->elementStart('a', $attrs);
1125 $xs->element('span', 'fn nickname', $nickname);
1126 $xs->elementEnd('a');
1127 $xs->elementEnd('span');
1128 return $xs->getString();
1135 * Resolve an ambiguous profile nickname reference, checking in following order:
1136 * - profiles that $sender subscribes to
1137 * - profiles that subscribe to $sender
1138 * - local user profiles
1140 * WARNING: does not validate or normalize $nickname -- MUST BE PRE-VALIDATED
1141 * OR THERE MAY BE A RISK OF SQL INJECTION ATTACKS. THIS FUNCTION DOES NOT
1144 * @fixme validate input
1146 * @fixme fix or remove mystery third parameter
1147 * @fixme is $sender a User or Profile?
1149 * @param <type> $sender the user or profile in whose context we're looking
1150 * @param string $nickname validated nickname of
1151 * @param <type> $dt unused mystery parameter; in Notice reply-to handling a timestamp is passed.
1153 * @return Profile or null
1155 function common_relative_profile($sender, $nickname, $dt=null)
1157 // Will throw exception on invalid input.
1158 $nickname = Nickname::normalize($nickname);
1160 // Try to find profiles this profile is subscribed to that have this nickname
1161 $recipient = new Profile();
1162 // XXX: use a join instead of a subquery
1163 $recipient->whereAdd('EXISTS (SELECT subscribed from subscription where subscriber = '.intval($sender->id).' and subscribed = id)', 'AND');
1164 $recipient->whereAdd("nickname = '" . $recipient->escape($nickname) . "'", 'AND');
1165 if ($recipient->find(true)) {
1166 // XXX: should probably differentiate between profiles with
1167 // the same name by date of most recent update
1170 // Try to find profiles that listen to this profile and that have this nickname
1171 $recipient = new Profile();
1172 // XXX: use a join instead of a subquery
1173 $recipient->whereAdd('EXISTS (SELECT subscriber from subscription where subscribed = '.intval($sender->id).' and subscriber = id)', 'AND');
1174 $recipient->whereAdd("nickname = '" . $recipient->escape($nickname) . "'", 'AND');
1175 if ($recipient->find(true)) {
1176 // XXX: should probably differentiate between profiles with
1177 // the same name by date of most recent update
1180 // If this is a local user, try to find a local user with that nickname.
1181 $sender = User::staticGet($sender->id);
1183 $recipient_user = User::staticGet('nickname', $nickname);
1184 if ($recipient_user) {
1185 return $recipient_user->getProfile();
1188 // Otherwise, no links. @messages from local users to remote users,
1189 // or from remote users to other remote users, are just
1190 // outside our ability to make intelligent guesses about
1194 function common_local_url($action, $args=null, $params=null, $fragment=null, $addSession=true)
1197 $path = $r->build($action, $args, $params, $fragment);
1199 $ssl = common_is_sensitive($action);
1201 if (common_config('site','fancy')) {
1202 $url = common_path(mb_substr($path, 1), $ssl, $addSession);
1204 if (mb_strpos($path, '/index.php') === 0) {
1205 $url = common_path(mb_substr($path, 1), $ssl, $addSession);
1207 $url = common_path('index.php'.$path, $ssl, $addSession);
1213 function common_is_sensitive($action)
1215 static $sensitive = array(
1220 'ApiOauthRequestToken',
1221 'ApiOauthAccessToken',
1222 'ApiOauthAuthorize',
1228 if (Event::handle('SensitiveAction', array($action, &$ssl))) {
1229 $ssl = in_array($action, $sensitive);
1235 function common_path($relative, $ssl=false, $addSession=true)
1237 $pathpart = (common_config('site', 'path')) ? common_config('site', 'path')."/" : '';
1239 if (($ssl && (common_config('site', 'ssl') === 'sometimes'))
1240 || common_config('site', 'ssl') === 'always') {
1242 if (is_string(common_config('site', 'sslserver')) &&
1243 mb_strlen(common_config('site', 'sslserver')) > 0) {
1244 $serverpart = common_config('site', 'sslserver');
1245 } else if (common_config('site', 'server')) {
1246 $serverpart = common_config('site', 'server');
1248 common_log(LOG_ERR, 'Site server not configured, unable to determine site name.');
1252 if (common_config('site', 'server')) {
1253 $serverpart = common_config('site', 'server');
1255 common_log(LOG_ERR, 'Site server not configured, unable to determine site name.');
1260 $relative = common_inject_session($relative, $serverpart);
1263 return $proto.'://'.$serverpart.'/'.$pathpart.$relative;
1266 function common_inject_session($url, $serverpart = null)
1268 if (common_have_session()) {
1270 if (empty($serverpart)) {
1271 $serverpart = parse_url($url, PHP_URL_HOST);
1274 $currentServer = $_SERVER['HTTP_HOST'];
1276 // Are we pointing to another server (like an SSL server?)
1278 if (!empty($currentServer) &&
1279 0 != strcasecmp($currentServer, $serverpart)) {
1280 // Pass the session ID as a GET parameter
1281 $sesspart = session_name() . '=' . session_id();
1282 $i = strpos($url, '?');
1283 if ($i === false) { // no GET params, just append
1284 $url .= '?' . $sesspart;
1286 $url = substr($url, 0, $i + 1).$sesspart.'&'.substr($url, $i + 1);
1294 function common_date_string($dt)
1296 // XXX: do some sexy date formatting
1297 // return date(DATE_RFC822, $dt);
1298 $t = strtotime($dt);
1302 if ($now < $t) { // that shouldn't happen!
1303 return common_exact_date($dt);
1304 } else if ($diff < 60) {
1305 // TRANS: Used in notices to indicate when the notice was made compared to now.
1306 return _('a few seconds ago');
1307 } else if ($diff < 92) {
1308 // TRANS: Used in notices to indicate when the notice was made compared to now.
1309 return _('about a minute ago');
1310 } else if ($diff < 3300) {
1311 $minutes = round($diff/60);
1312 // TRANS: Used in notices to indicate when the notice was made compared to now.
1313 return sprintf( ngettext('about one minute ago', 'about %d minutes ago', $minutes), $minutes);
1314 } else if ($diff < 5400) {
1315 // TRANS: Used in notices to indicate when the notice was made compared to now.
1316 return _('about an hour ago');
1317 } else if ($diff < 22 * 3600) {
1318 $hours = round($diff/3600);
1319 // TRANS: Used in notices to indicate when the notice was made compared to now.
1320 return sprintf( ngettext('about one hour ago', 'about %d hours ago', $hours), $hours);
1321 } else if ($diff < 37 * 3600) {
1322 // TRANS: Used in notices to indicate when the notice was made compared to now.
1323 return _('about a day ago');
1324 } else if ($diff < 24 * 24 * 3600) {
1325 $days = round($diff/(24*3600));
1326 // TRANS: Used in notices to indicate when the notice was made compared to now.
1327 return sprintf( ngettext('about one day ago', 'about %d days ago', $days), $days);
1328 } else if ($diff < 46 * 24 * 3600) {
1329 // TRANS: Used in notices to indicate when the notice was made compared to now.
1330 return _('about a month ago');
1331 } else if ($diff < 330 * 24 * 3600) {
1332 $months = round($diff/(30*24*3600));
1333 // TRANS: Used in notices to indicate when the notice was made compared to now.
1334 return sprintf( ngettext('about one month ago', 'about %d months ago',$months), $months);
1335 } else if ($diff < 480 * 24 * 3600) {
1336 // TRANS: Used in notices to indicate when the notice was made compared to now.
1337 return _('about a year ago');
1339 return common_exact_date($dt);
1343 function common_exact_date($dt)
1349 $_utc = new DateTimeZone('UTC');
1350 $_siteTz = new DateTimeZone(common_timezone());
1353 $dateStr = date('d F Y H:i:s', strtotime($dt));
1354 $d = new DateTime($dateStr, $_utc);
1355 $d->setTimezone($_siteTz);
1356 return $d->format(DATE_RFC850);
1359 function common_date_w3dtf($dt)
1361 $dateStr = date('d F Y H:i:s', strtotime($dt));
1362 $d = new DateTime($dateStr, new DateTimeZone('UTC'));
1363 $d->setTimezone(new DateTimeZone(common_timezone()));
1364 return $d->format(DATE_W3C);
1367 function common_date_rfc2822($dt)
1369 $dateStr = date('d F Y H:i:s', strtotime($dt));
1370 $d = new DateTime($dateStr, new DateTimeZone('UTC'));
1371 $d->setTimezone(new DateTimeZone(common_timezone()));
1372 return $d->format('r');
1375 function common_date_iso8601($dt)
1377 $dateStr = date('d F Y H:i:s', strtotime($dt));
1378 $d = new DateTime($dateStr, new DateTimeZone('UTC'));
1379 $d->setTimezone(new DateTimeZone(common_timezone()));
1380 return $d->format('c');
1383 function common_sql_now()
1385 return common_sql_date(time());
1388 function common_sql_date($datetime)
1390 return strftime('%Y-%m-%d %H:%M:%S', $datetime);
1394 * Return an SQL fragment to calculate an age-based weight from a given
1395 * timestamp or datetime column.
1397 * @param string $column name of field we're comparing against current time
1398 * @param integer $dropoff divisor for age in seconds before exponentiation
1399 * @return string SQL fragment
1401 function common_sql_weight($column, $dropoff)
1403 if (common_config('db', 'type') == 'pgsql') {
1404 // PostgreSQL doesn't support timestampdiff function.
1405 // @fixme will this use the right time zone?
1406 // @fixme does this handle cross-year subtraction correctly?
1407 return "sum(exp(-extract(epoch from (now() - $column)) / $dropoff))";
1409 return "sum(exp(timestampdiff(second, utc_timestamp(), $column) / $dropoff))";
1413 function common_redirect($url, $code=307)
1415 static $status = array(301 => "Moved Permanently",
1418 307 => "Temporary Redirect");
1420 header('HTTP/1.1 '.$code.' '.$status[$code]);
1421 header("Location: $url");
1423 $xo = new XMLOutputter();
1425 '-//W3C//DTD XHTML 1.0 Strict//EN',
1426 'http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd');
1427 $xo->element('a', array('href' => $url), $url);
1432 function common_broadcast_notice($notice, $remote=false)
1438 * Stick the notice on the queue.
1440 function common_enqueue_notice($notice)
1442 static $localTransports = array('omb',
1445 $transports = array();
1446 if (common_config('sms', 'enabled')) {
1447 $transports[] = 'sms';
1449 if (Event::hasHandler('HandleQueuedNotice')) {
1450 $transports[] = 'plugin';
1453 $xmpp = common_config('xmpp', 'enabled');
1456 $transports[] = 'jabber';
1459 // We can skip these for gatewayed notices.
1460 if ($notice->isLocal()) {
1461 $transports = array_merge($transports, $localTransports);
1463 $transports[] = 'public';
1467 if (Event::handle('StartEnqueueNotice', array($notice, &$transports))) {
1469 $qm = QueueManager::get();
1471 foreach ($transports as $transport)
1473 $qm->enqueue($notice, $transport);
1476 Event::handle('EndEnqueueNotice', array($notice, $transports));
1483 * Broadcast profile updates to OMB and other remote subscribers.
1485 * Since this may be slow with a lot of subscribers or bad remote sites,
1486 * this is run through the background queues if possible.
1488 function common_broadcast_profile(Profile $profile)
1490 $qm = QueueManager::get();
1491 $qm->enqueue($profile, "profile");
1495 function common_profile_url($nickname)
1497 return common_local_url('showstream', array('nickname' => $nickname),
1502 * Should make up a reasonable root URL
1504 function common_root_url($ssl=false)
1506 $url = common_path('', $ssl, false);
1507 $i = strpos($url, '?');
1509 $url = substr($url, 0, $i);
1515 * returns $bytes bytes of random data as a hexadecimal string
1516 * "good" here is a goal and not a guarantee
1518 function common_good_rand($bytes)
1520 // XXX: use random.org...?
1521 if (@file_exists('/dev/urandom')) {
1522 return common_urandom($bytes);
1523 } else { // FIXME: this is probably not good enough
1524 return common_mtrand($bytes);
1528 function common_urandom($bytes)
1530 $h = fopen('/dev/urandom', 'rb');
1532 $src = fread($h, $bytes);
1535 for ($i = 0; $i < $bytes; $i++) {
1536 $enc .= sprintf("%02x", (ord($src[$i])));
1541 function common_mtrand($bytes)
1544 for ($i = 0; $i < $bytes; $i++) {
1545 $enc .= sprintf("%02x", mt_rand(0, 255));
1551 * Record the given URL as the return destination for a future
1552 * form submission, to be read by common_get_returnto().
1554 * @param string $url
1556 * @fixme as a session-global setting, this can allow multiple forms
1557 * to conflict and overwrite each others' returnto destinations if
1558 * the user has multiple tabs or windows open.
1560 * Should refactor to index with a token or otherwise only pass the
1561 * data along its intended path.
1563 function common_set_returnto($url)
1565 common_ensure_session();
1566 $_SESSION['returnto'] = $url;
1570 * Fetch a return-destination URL previously recorded by
1571 * common_set_returnto().
1573 * @return mixed URL string or null
1575 * @fixme as a session-global setting, this can allow multiple forms
1576 * to conflict and overwrite each others' returnto destinations if
1577 * the user has multiple tabs or windows open.
1579 * Should refactor to index with a token or otherwise only pass the
1580 * data along its intended path.
1582 function common_get_returnto()
1584 common_ensure_session();
1585 return (array_key_exists('returnto', $_SESSION)) ? $_SESSION['returnto'] : null;
1588 function common_timestamp()
1590 return date('YmdHis');
1593 function common_ensure_syslog()
1595 static $initialized = false;
1596 if (!$initialized) {
1597 openlog(common_config('syslog', 'appname'), 0,
1598 common_config('syslog', 'facility'));
1599 $initialized = true;
1603 function common_log_line($priority, $msg)
1605 static $syslog_priorities = array('LOG_EMERG', 'LOG_ALERT', 'LOG_CRIT', 'LOG_ERR',
1606 'LOG_WARNING', 'LOG_NOTICE', 'LOG_INFO', 'LOG_DEBUG');
1607 return date('Y-m-d H:i:s') . ' ' . $syslog_priorities[$priority] . ': ' . $msg . PHP_EOL;
1610 function common_request_id()
1613 $server = common_config('site', 'server');
1614 if (php_sapi_name() == 'cli') {
1615 $script = basename($_SERVER['PHP_SELF']);
1616 return "$server:$script:$pid";
1618 static $req_id = null;
1619 if (!isset($req_id)) {
1620 $req_id = substr(md5(mt_rand()), 0, 8);
1622 if (isset($_SERVER['REQUEST_URI'])) {
1623 $url = $_SERVER['REQUEST_URI'];
1625 $method = $_SERVER['REQUEST_METHOD'];
1626 return "$server:$pid.$req_id $method $url";
1630 function common_log($priority, $msg, $filename=null)
1632 if(Event::handle('StartLog', array(&$priority, &$msg, &$filename))){
1633 $msg = (empty($filename)) ? $msg : basename($filename) . ' - ' . $msg;
1634 $msg = '[' . common_request_id() . '] ' . $msg;
1635 $logfile = common_config('site', 'logfile');
1637 $log = fopen($logfile, "a");
1639 $output = common_log_line($priority, $msg);
1640 fwrite($log, $output);
1644 common_ensure_syslog();
1645 syslog($priority, $msg);
1647 Event::handle('EndLog', array($priority, $msg, $filename));
1651 function common_debug($msg, $filename=null)
1654 common_log(LOG_DEBUG, basename($filename).' - '.$msg);
1656 common_log(LOG_DEBUG, $msg);
1660 function common_log_db_error(&$object, $verb, $filename=null)
1662 $objstr = common_log_objstring($object);
1663 $last_error = &PEAR::getStaticProperty('DB_DataObject','lastError');
1664 if (is_object($last_error)) {
1665 $msg = $last_error->message;
1667 $msg = 'Unknown error (' . var_export($last_error, true) . ')';
1669 common_log(LOG_ERR, $msg . '(' . $verb . ' on ' . $objstr . ')', $filename);
1672 function common_log_objstring(&$object)
1674 if (is_null($object)) {
1677 if (!($object instanceof DB_DataObject)) {
1680 $arr = $object->toArray();
1682 foreach ($arr as $k => $v) {
1683 if (is_object($v)) {
1684 $fields[] = "$k='".get_class($v)."'";
1686 $fields[] = "$k='$v'";
1689 $objstring = $object->tableName() . '[' . implode(',', $fields) . ']';
1693 function common_valid_http_url($url)
1695 return Validate::uri($url, array('allowed_schemes' => array('http', 'https')));
1698 function common_valid_tag($tag)
1700 if (preg_match('/^tag:(.*?),(\d{4}(-\d{2}(-\d{2})?)?):(.*)$/', $tag, $matches)) {
1701 return (Validate::email($matches[1]) ||
1702 preg_match('/^([\w-\.]+)$/', $matches[1]));
1708 * Determine if given domain or address literal is valid
1709 * eg for use in JIDs and URLs. Does not check if the domain
1712 * @param string $domain
1713 * @return boolean valid or not
1715 function common_valid_domain($domain)
1717 $octet = "(?:25[0-5]|2[0-4][0-9]|1[0-9]{2}|[1-9][0-9]|[0-9])";
1718 $ipv4 = "(?:$octet(?:\.$octet){3})";
1719 if (preg_match("/^$ipv4$/u", $domain)) return true;
1721 $group = "(?:[0-9a-f]{1,4})";
1722 $ipv6 = "(?:\[($group(?::$group){0,7})?(::)?($group(?::$group){0,7})?\])"; // http://tools.ietf.org/html/rfc3513#section-2.2
1724 if (preg_match("/^$ipv6$/ui", $domain, $matches)) {
1725 $before = explode(":", $matches[1]);
1726 $zeroes = $matches[2];
1727 $after = explode(":", $matches[3]);
1735 $explicit = count($before) + count($after);
1736 if ($explicit < $min || $explicit > $max) {
1743 require_once "Net/IDNA.php";
1744 $idn = Net_IDNA::getInstance();
1745 $domain = $idn->encode($domain);
1746 } catch (Exception $e) {
1750 $subdomain = "(?:[a-z0-9][a-z0-9-]*)"; // @fixme
1751 $fqdn = "(?:$subdomain(?:\.$subdomain)*\.?)";
1753 return preg_match("/^$fqdn$/ui", $domain);
1756 /* Following functions are copied from MediaWiki GlobalFunctions.php
1757 * and written by Evan Prodromou. */
1759 function common_accept_to_prefs($accept, $def = '*/*')
1761 // No arg means accept anything (per HTTP spec)
1763 return array($def => 1);
1768 $parts = explode(',', $accept);
1770 foreach($parts as $part) {
1771 // FIXME: doesn't deal with params like 'text/html; level=1'
1772 @list($value, $qpart) = explode(';', trim($part));
1774 if(!isset($qpart)) {
1776 } elseif(preg_match('/q\s*=\s*(\d*\.\d+)/', $qpart, $match)) {
1777 $prefs[$value] = $match[1];
1784 function common_mime_type_match($type, $avail)
1786 if(array_key_exists($type, $avail)) {
1789 $parts = explode('/', $type);
1790 if(array_key_exists($parts[0] . '/*', $avail)) {
1791 return $parts[0] . '/*';
1792 } elseif(array_key_exists('*/*', $avail)) {
1800 function common_negotiate_type($cprefs, $sprefs)
1804 foreach(array_keys($sprefs) as $type) {
1805 $parts = explode('/', $type);
1806 if($parts[1] != '*') {
1807 $ckey = common_mime_type_match($type, $cprefs);
1809 $combine[$type] = $sprefs[$type] * $cprefs[$ckey];
1814 foreach(array_keys($cprefs) as $type) {
1815 $parts = explode('/', $type);
1816 if($parts[1] != '*' && !array_key_exists($type, $sprefs)) {
1817 $skey = common_mime_type_match($type, $sprefs);
1819 $combine[$type] = $sprefs[$skey] * $cprefs[$type];
1825 $besttype = 'text/html';
1827 foreach(array_keys($combine) as $type) {
1828 if($combine[$type] > $bestq) {
1830 $bestq = $combine[$type];
1834 if ('text/html' === $besttype) {
1835 return "text/html; charset=utf-8";
1840 function common_config($main, $sub)
1843 return (array_key_exists($main, $config) &&
1844 array_key_exists($sub, $config[$main])) ? $config[$main][$sub] : false;
1848 * Pull arguments from a GET/POST/REQUEST array with first-level input checks:
1849 * strips "magic quotes" slashes if necessary, and kills invalid UTF-8 strings.
1851 * @param array $from
1854 function common_copy_args($from)
1857 $strip = get_magic_quotes_gpc();
1858 foreach ($from as $k => $v) {
1860 $to[$k] = common_copy_args($v);
1863 $v = stripslashes($v);
1865 $to[$k] = strval(common_validate_utf8($v));
1872 * Neutralise the evil effects of magic_quotes_gpc in the current request.
1873 * This is used before handing a request off to OAuthRequest::from_request.
1874 * @fixme Doesn't consider vars other than _POST and _GET?
1875 * @fixme Can't be undone and could corrupt data if run twice.
1877 function common_remove_magic_from_request()
1879 if(get_magic_quotes_gpc()) {
1880 $_POST=array_map('stripslashes',$_POST);
1881 $_GET=array_map('stripslashes',$_GET);
1885 function common_user_uri(&$user)
1887 return common_local_url('userbyid', array('id' => $user->id),
1891 function common_notice_uri(&$notice)
1893 return common_local_url('shownotice',
1894 array('notice' => $notice->id),
1898 // 36 alphanums - lookalikes (0, O, 1, I) = 32 chars = 5 bits
1900 function common_confirmation_code($bits)
1902 // 36 alphanums - lookalikes (0, O, 1, I) = 32 chars = 5 bits
1903 static $codechars = '23456789ABCDEFGHJKLMNPQRSTUVWXYZ';
1904 $chars = ceil($bits/5);
1906 for ($i = 0; $i < $chars; $i++) {
1907 // XXX: convert to string and back
1908 $num = hexdec(common_good_rand(1));
1909 // XXX: randomness is too precious to throw away almost
1910 // 40% of the bits we get!
1911 $code .= $codechars[$num%32];
1916 // convert markup to HTML
1918 function common_markup_to_html($c)
1920 $c = preg_replace('/%%action.(\w+)%%/e', "common_local_url('\\1')", $c);
1921 $c = preg_replace('/%%doc.(\w+)%%/e', "common_local_url('doc', array('title'=>'\\1'))", $c);
1922 $c = preg_replace('/%%(\w+).(\w+)%%/e', 'common_config(\'\\1\', \'\\2\')', $c);
1923 return Markdown($c);
1926 function common_profile_uri($profile)
1931 $user = User::staticGet($profile->id);
1936 $remote = Remote_profile::staticGet($profile->id);
1938 return $remote->uri;
1940 // XXX: this is a very bad profile!
1944 function common_canonical_sms($sms)
1947 preg_replace('/\D/', '', $sms);
1951 function common_error_handler($errno, $errstr, $errfile, $errline, $errcontext)
1956 case E_COMPILE_ERROR:
1960 case E_RECOVERABLE_ERROR:
1961 common_log(LOG_ERR, "[$errno] $errstr ($errfile:$errline) [ABORT]");
1966 case E_COMPILE_WARNING:
1967 case E_CORE_WARNING:
1968 case E_USER_WARNING:
1969 common_log(LOG_WARNING, "[$errno] $errstr ($errfile:$errline)");
1974 common_log(LOG_NOTICE, "[$errno] $errstr ($errfile:$errline)");
1979 case E_USER_DEPRECATED:
1980 // XXX: config variable to log this stuff, too
1984 common_log(LOG_ERR, "[$errno] $errstr ($errfile:$errline) [UNKNOWN LEVEL, die()'ing]");
1989 // FIXME: show error page if we're on the Web
1990 /* Don't execute PHP internal error handler */
1994 function common_session_token()
1996 common_ensure_session();
1997 if (!array_key_exists('token', $_SESSION)) {
1998 $_SESSION['token'] = common_good_rand(64);
2000 return $_SESSION['token'];
2003 function common_cache_key($extra)
2005 return Cache::key($extra);
2008 function common_keyize($str)
2010 return Cache::keyize($str);
2013 function common_memcache()
2015 return Cache::instance();
2018 function common_license_terms($uri)
2020 if(preg_match('/creativecommons.org\/licenses\/([^\/]+)/', $uri, $matches)) {
2021 return explode('-',$matches[1]);
2026 function common_compatible_license($from, $to)
2028 $from_terms = common_license_terms($from);
2029 // public domain and cc-by are compatible with everything
2030 if(count($from_terms) == 1 && ($from_terms[0] == 'publicdomain' || $from_terms[0] == 'by')) {
2033 $to_terms = common_license_terms($to);
2034 // sa is compatible across versions. IANAL
2035 if(in_array('sa',$from_terms) || in_array('sa',$to_terms)) {
2036 return count(array_diff($from_terms, $to_terms)) == 0;
2038 // XXX: better compatibility check needed here!
2039 // Should at least normalise URIs
2040 return ($from == $to);
2044 * returns a quoted table name, if required according to config
2046 function common_database_tablename($tablename)
2048 if(common_config('db','quote_identifiers')) {
2049 $tablename = '"'. $tablename .'"';
2051 //table prefixes could be added here later
2056 * Shorten a URL with the current user's configured shortening service,
2057 * or ur1.ca if configured, or not at all if no shortening is set up.
2058 * Length is not considered.
2060 * @param string $long_url
2061 * @param User $user to specify a particular user's options
2062 * @return string may return the original URL if shortening failed
2064 * @fixme provide a way to specify a particular shortener
2066 function common_shorten_url($long_url, User $user=null)
2068 $long_url = trim($long_url);
2070 // Current web session
2071 $user = common_current_user();
2074 // common current user does not find a user when called from the XMPP daemon
2075 // therefore we'll set one here fix, so that XMPP given URLs may be shortened
2076 $shortenerName = 'ur1.ca';
2078 $shortenerName = $user->urlshorteningservice;
2081 if(Event::handle('StartShortenUrl', array($long_url,$shortenerName,&$shortenedUrl))){
2082 //URL wasn't shortened, so return the long url
2085 //URL was shortened, so return the result
2086 return trim($shortenedUrl);
2091 * @return mixed array($proxy, $ip) for web requests; proxy may be null
2092 * null if not a web request
2094 * @fixme X-Forwarded-For can be chained by multiple proxies;
2095 we should parse the list and provide a cleaner array
2096 * @fixme X-Forwarded-For can be forged by clients; only use them if trusted
2097 * @fixme X_Forwarded_For headers will override X-Forwarded-For read through $_SERVER;
2098 * use function to get exact request headers from Apache if possible.
2100 function common_client_ip()
2102 if (!isset($_SERVER) || !array_key_exists('REQUEST_METHOD', $_SERVER)) {
2106 if (array_key_exists('HTTP_X_FORWARDED_FOR', $_SERVER)) {
2107 if (array_key_exists('HTTP_CLIENT_IP', $_SERVER)) {
2108 $proxy = $_SERVER['HTTP_CLIENT_IP'];
2110 $proxy = $_SERVER['REMOTE_ADDR'];
2112 $ip = $_SERVER['HTTP_X_FORWARDED_FOR'];
2115 if (array_key_exists('HTTP_CLIENT_IP', $_SERVER)) {
2116 $ip = $_SERVER['HTTP_CLIENT_IP'];
2118 $ip = $_SERVER['REMOTE_ADDR'];
2122 return array($proxy, $ip);
2125 function common_url_to_nickname($url)
2127 static $bad = array('query', 'user', 'password', 'port', 'fragment');
2129 $parts = parse_url($url);
2131 # If any of these parts exist, this won't work
2133 foreach ($bad as $badpart) {
2134 if (array_key_exists($badpart, $parts)) {
2139 # We just have host and/or path
2141 # If it's just a host...
2142 if (array_key_exists('host', $parts) &&
2143 (!array_key_exists('path', $parts) || strcmp($parts['path'], '/') == 0))
2145 $hostparts = explode('.', $parts['host']);
2147 # Try to catch common idiom of nickname.service.tld
2149 if ((count($hostparts) > 2) &&
2150 (strlen($hostparts[count($hostparts) - 2]) > 3) && # try to skip .co.uk, .com.au
2151 (strcmp($hostparts[0], 'www') != 0))
2153 return common_nicknamize($hostparts[0]);
2155 # Do the whole hostname
2156 return common_nicknamize($parts['host']);
2159 if (array_key_exists('path', $parts)) {
2160 # Strip starting, ending slashes
2161 $path = preg_replace('@/$@', '', $parts['path']);
2162 $path = preg_replace('@^/@', '', $path);
2163 $path = basename($path);
2165 // Hack for MediaWiki user pages, in the form:
2166 // http://example.com/wiki/User:Myname
2167 // ('User' may be localized.)
2168 if (strpos($path, ':')) {
2169 $parts = array_filter(explode(':', $path));
2170 $path = $parts[count($parts) - 1];
2174 return common_nicknamize($path);
2182 function common_nicknamize($str)
2184 $str = preg_replace('/\W/', '', $str);
2185 return strtolower($str);
2188 function common_perf_counter($key, $val=null)
2190 global $_perfCounters;
2191 if (isset($_perfCounters)) {
2192 if (common_config('site', 'logperf')) {
2193 if (array_key_exists($key, $_perfCounters)) {
2194 $_perfCounters[$key][] = $val;
2196 $_perfCounters[$key] = array($val);
2198 if (common_config('site', 'logperf_detail')) {
2199 common_log(LOG_DEBUG, "PERF COUNTER HIT: $key $val");
2205 function common_log_perf_counters()
2207 if (common_config('site', 'logperf')) {
2208 global $_startTime, $_perfCounters;
2210 if (isset($_startTime)) {
2211 $endTime = microtime(true);
2212 $diff = round(($endTime - $_startTime) * 1000);
2213 common_log(LOG_DEBUG, "PERF runtime: ${diff}ms");
2215 $counters = $_perfCounters;
2217 foreach ($counters as $key => $values) {
2218 $count = count($values);
2219 $unique = count(array_unique($values));
2220 common_log(LOG_DEBUG, "PERF COUNTER: $key $count ($unique unique)");