<?php
/*
* StatusNet - the distributed open-source microblogging tool
* Copyright (C) 2008-2011, StatusNet, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
/* XXX: break up into separate modules (HTTP, user, files) */
/**
* Show a server error.
*/
function common_server_error($msg, $code=500)
{
$err = new ServerErrorAction($msg, $code);
$err->showPage();
}
/**
* Show a user error.
*/
function common_user_error($msg, $code=400)
{
$err = new ClientErrorAction($msg, $code);
$err->showPage();
}
/**
* This should only be used at setup; processes switching languages
* to send text to other users should use common_switch_locale().
*
* @param string $language Locale language code (optional; empty uses
* current user's preference or site default)
* @return mixed success
*/
function common_init_locale($language=null)
{
if(!$language) {
$language = common_language();
}
putenv('LANGUAGE='.$language);
putenv('LANG='.$language);
$ok = setlocale(LC_ALL, $language . ".utf8",
$language . ".UTF8",
$language . ".utf-8",
$language . ".UTF-8",
$language);
return $ok;
}
/**
* Initialize locale and charset settings and gettext with our message catalog,
* using the current user's language preference or the site default.
*
* This should generally only be run at framework initialization; code switching
* languages at runtime should call common_switch_language().
*
* @access private
*/
function common_init_language()
{
mb_internal_encoding('UTF-8');
// Note that this setlocale() call may "fail" but this is harmless;
// gettext will still select the right language.
$language = common_language();
$locale_set = common_init_locale($language);
if (!$locale_set) {
// The requested locale doesn't exist on the system.
//
// gettext seems very picky... We first need to setlocale()
// to a locale which _does_ exist on the system, and _then_
// we can set in another locale that may not be set up
// (say, ga_ES for Galego/Galician) it seems to take it.
//
// For some reason C and POSIX which are guaranteed to work
// don't do the job. en_US.UTF-8 should be there most of the
// time, but not guaranteed.
$ok = common_init_locale("en_US");
if (!$ok && strtolower(substr(PHP_OS, 0, 3)) != 'win') {
// Try to find a complete, working locale on Unix/Linux...
// @fixme shelling out feels awfully inefficient
// but I don't think there's a more standard way.
$all = `locale -a`;
foreach (explode("\n", $all) as $locale) {
if (preg_match('/\.utf[-_]?8$/i', $locale)) {
$ok = setlocale(LC_ALL, $locale);
if ($ok) {
break;
}
}
}
}
if (!$ok) {
common_log(LOG_ERR, "Unable to find a UTF-8 locale on this system; UI translations may not work.");
}
$locale_set = common_init_locale($language);
}
common_init_gettext();
}
/**
* @access private
*/
function common_init_gettext()
{
setlocale(LC_CTYPE, 'C');
// So we do not have to make people install the gettext locales
$path = common_config('site','locale_path');
bindtextdomain("statusnet", $path);
bind_textdomain_codeset("statusnet", "UTF-8");
textdomain("statusnet");
}
/**
* Switch locale during runtime, and poke gettext until it cries uncle.
* Otherwise, sometimes it doesn't actually switch away from the old language.
*
* @param string $language code for locale ('en', 'fr', 'pt_BR' etc)
*/
function common_switch_locale($language=null)
{
common_init_locale($language);
setlocale(LC_CTYPE, 'C');
// So we do not have to make people install the gettext locales
$path = common_config('site','locale_path');
bindtextdomain("statusnet", $path);
bind_textdomain_codeset("statusnet", "UTF-8");
textdomain("statusnet");
}
function common_timezone()
{
if (common_logged_in()) {
$user = common_current_user();
if ($user->timezone) {
return $user->timezone;
}
}
return common_config('site', 'timezone');
}
function common_valid_language($lang)
{
if ($lang) {
// Validate -- we don't want to end up with a bogus code
// left over from some old junk.
foreach (common_config('site', 'languages') as $code => $info) {
if ($info['lang'] == $lang) {
return true;
}
}
}
return false;
}
function common_language()
{
// Allow ?uselang=xx override, very useful for debugging
// and helping translators check usage and context.
if (isset($_GET['uselang'])) {
$uselang = strval($_GET['uselang']);
if (common_valid_language($uselang)) {
return $uselang;
}
}
// If there is a user logged in and they've set a language preference
// then return that one...
if (_have_config() && common_logged_in()) {
$user = common_current_user();
if (common_valid_language($user->language)) {
return $user->language;
}
}
// Otherwise, find the best match for the languages requested by the
// user's browser...
if (common_config('site', 'langdetect')) {
$httplang = isset($_SERVER['HTTP_ACCEPT_LANGUAGE']) ? $_SERVER['HTTP_ACCEPT_LANGUAGE'] : null;
if (!empty($httplang)) {
$language = client_prefered_language($httplang);
if ($language)
return $language;
}
}
// Finally, if none of the above worked, use the site's default...
return common_config('site', 'language');
}
/**
* Salted, hashed passwords are stored in the DB.
*/
function common_munge_password($password, Profile $profile=null)
{
$hashed = null;
if (Event::handle('StartHashPassword', array(&$hashed, $password, $profile))) {
Event::handle('EndHashPassword', array(&$hashed, $password, $profile));
}
if (empty($hashed)) {
throw new PasswordHashException();
}
return $hashed;
}
/**
* Check if a username exists and has matching password.
*/
function common_check_user($nickname, $password)
{
// empty nickname always unacceptable
if (empty($nickname)) {
return false;
}
$authenticatedUser = false;
if (Event::handle('StartCheckPassword', array($nickname, $password, &$authenticatedUser))) {
if (common_is_email($nickname)) {
$user = User::getKV('email', common_canonical_email($nickname));
} else {
$user = User::getKV('nickname', Nickname::normalize($nickname));
}
if ($user instanceof User && !empty($password)) {
if (0 == strcmp(common_munge_password($password, $user->getProfile()), $user->password)) {
//internal checking passed
$authenticatedUser = $user;
}
}
}
Event::handle('EndCheckPassword', array($nickname, $password, $authenticatedUser));
return $authenticatedUser;
}
/**
* Is the current user logged in?
*/
function common_logged_in()
{
return (!is_null(common_current_user()));
}
function common_local_referer()
{
return isset($_SERVER['HTTP_REFERER'])
&& parse_url($_SERVER['HTTP_REFERER'], PHP_URL_HOST) === common_config('site', 'server');
}
function common_have_session()
{
return (0 != strcmp(session_id(), ''));
}
function common_ensure_session()
{
$c = null;
if (array_key_exists(session_name(), $_COOKIE)) {
$c = $_COOKIE[session_name()];
}
if (!common_have_session()) {
if (common_config('sessions', 'handle')) {
Session::setSaveHandler();
}
if (array_key_exists(session_name(), $_GET)) {
$id = $_GET[session_name()];
} else if (array_key_exists(session_name(), $_COOKIE)) {
$id = $_COOKIE[session_name()];
}
if (isset($id)) {
session_id($id);
}
@session_start();
if (!isset($_SESSION['started'])) {
$_SESSION['started'] = time();
if (!empty($id)) {
common_log(LOG_WARNING, 'Session cookie "' . $_COOKIE[session_name()] . '" ' .
' is set but started value is null');
}
}
}
}
// Three kinds of arguments:
// 1) a user object
// 2) a nickname
// 3) null to clear
// Initialize to false; set to null if none found
$_cur = false;
function common_set_user($user)
{
global $_cur;
if (is_null($user) && common_have_session()) {
$_cur = null;
unset($_SESSION['userid']);
return true;
} else if (is_string($user)) {
$nickname = $user;
$user = User::getKV('nickname', $nickname);
} else if (!$user instanceof User) {
return false;
}
if ($user) {
if (Event::handle('StartSetUser', array(&$user))) {
if (!empty($user)) {
if (!$user->hasRight(Right::WEBLOGIN)) {
// TRANS: Authorisation exception thrown when a user a not allowed to login.
throw new AuthorizationException(_('Not allowed to log in.'));
}
common_ensure_session();
$_SESSION['userid'] = $user->id;
$_cur = $user;
Event::handle('EndSetUser', array($user));
return $_cur;
}
}
}
return false;
}
function common_set_cookie($key, $value, $expiration=0)
{
$path = common_config('site', 'path');
$server = common_config('site', 'server');
if ($path && ($path != '/')) {
$cookiepath = '/' . $path . '/';
} else {
$cookiepath = '/';
}
return setcookie($key,
$value,
$expiration,
$cookiepath,
$server,
GNUsocial::useHTTPS());
}
define('REMEMBERME', 'rememberme');
define('REMEMBERME_EXPIRY', 30 * 24 * 60 * 60); // 30 days
function common_rememberme($user=null)
{
if (!$user) {
$user = common_current_user();
if (!$user) {
return false;
}
}
$rm = new Remember_me();
$rm->code = common_random_hexstr(16);
$rm->user_id = $user->id;
// Wrap the insert in some good ol' fashioned transaction code
$rm->query('BEGIN');
$result = $rm->insert();
if (!$result) {
common_log_db_error($rm, 'INSERT', __FILE__);
$rm->query('ROLLBACK');
return false;
}
$rm->query('COMMIT');
$cookieval = $rm->user_id . ':' . $rm->code;
common_log(LOG_INFO, 'adding rememberme cookie "' . $cookieval . '" for ' . $user->nickname);
common_set_cookie(REMEMBERME, $cookieval, time() + REMEMBERME_EXPIRY);
return true;
}
function common_remembered_user()
{
$user = null;
$packed = isset($_COOKIE[REMEMBERME]) ? $_COOKIE[REMEMBERME] : null;
if (!$packed) {
return null;
}
list($id, $code) = explode(':', $packed);
if (!$id || !$code) {
common_log(LOG_WARNING, 'Malformed rememberme cookie: ' . $packed);
common_forgetme();
return null;
}
$rm = Remember_me::getKV('code', $code);
if (!$rm) {
common_log(LOG_WARNING, 'No such remember code: ' . $code);
common_forgetme();
return null;
}
if ($rm->user_id != $id) {
common_log(LOG_WARNING, 'Rememberme code for wrong user: ' . $rm->user_id . ' != ' . $id);
common_forgetme();
return null;
}
$user = User::getKV('id', $rm->user_id);
if (!$user instanceof User) {
common_log(LOG_WARNING, 'No such user for rememberme: ' . $rm->user_id);
common_forgetme();
return null;
}
// successful!
$result = $rm->delete();
if (!$result) {
common_log_db_error($rm, 'DELETE', __FILE__);
common_log(LOG_WARNING, 'Could not delete rememberme: ' . $code);
common_forgetme();
return null;
}
common_log(LOG_INFO, 'logging in ' . $user->nickname . ' using rememberme code ' . $rm->code);
common_set_user($user);
common_real_login(false);
// We issue a new cookie, so they can log in
// automatically again after this session
common_rememberme($user);
return $user;
}
/**
* must be called with a valid user!
*/
function common_forgetme()
{
common_set_cookie(REMEMBERME, '', 0);
}
/**
* Who is the current user?
*/
function common_current_user()
{
global $_cur;
if (!_have_config()) {
return null;
}
if ($_cur === false) {
if (isset($_COOKIE[session_name()]) || isset($_GET[session_name()])
|| (isset($_SESSION['userid']) && $_SESSION['userid'])) {
common_ensure_session();
$id = isset($_SESSION['userid']) ? $_SESSION['userid'] : false;
if ($id) {
$user = User::getKV('id', $id);
if ($user instanceof User) {
$_cur = $user;
return $_cur;
}
}
}
// that didn't work; try to remember; will init $_cur to null on failure
$_cur = common_remembered_user();
if ($_cur) {
// XXX: Is this necessary?
$_SESSION['userid'] = $_cur->id;
}
}
return $_cur;
}
/**
* Logins that are 'remembered' aren't 'real' -- they're subject to
* cookie-stealing. So, we don't let them do certain things. New reg,
* OpenID, and password logins _are_ real.
*/
function common_real_login($real=true)
{
common_ensure_session();
$_SESSION['real_login'] = $real;
}
function common_is_real_login()
{
return common_logged_in() && $_SESSION['real_login'];
}
/**
* Get a hash portion for HTTP caching Etags and such including
* info on the current user's session. If login/logout state changes,
* or we've changed accounts, or we've renamed the current user,
* we'll get a new hash value.
*
* This should not be considered secure information.
*
* @param User $user (optional; uses common_current_user() if left out)
* @return string
*/
function common_user_cache_hash($user=false)
{
if ($user === false) {
$user = common_current_user();
}
if ($user) {
return crc32($user->id . ':' . $user->nickname);
} else {
return '0';
}
}
/**
* get canonical version of nickname for comparison
*
* @param string $nickname
* @return string
*
* @throws NicknameException on invalid input
* @deprecated call Nickname::normalize() directly.
*/
function common_canonical_nickname($nickname)
{
return Nickname::normalize($nickname);
}
/**
* get canonical version of email for comparison
*
* @fixme actually normalize
* @fixme reject invalid input
*
* @param string $email
* @return string
*/
function common_canonical_email($email)
{
// XXX: canonicalize UTF-8
// XXX: lcase the domain part
return $email;
}
function common_to_alphanumeric($str)
{
$filtered = preg_replace('/[^A-Za-z0-9]\s*/', '', $str);
if (strlen($filtered) < 1) {
throw new Exception('Filtered string was zero-length.');
}
return $filtered;
}
function common_purify($html, array $args=array())
{
require_once INSTALLDIR.'/extlib/HTMLPurifier/HTMLPurifier.auto.php';
$cfg = HTMLPurifier_Config::createDefault();
/**
* rel values that should be avoided since they can be used to infer
* information about the _current_ page, not the h-entry:
*
* directory, home, license, payment
*
* Source: http://microformats.org/wiki/rel
*/
$cfg->set('Attr.AllowedRel', ['bookmark', 'enclosure', 'nofollow', 'tag', 'noreferrer']);
$cfg->set('HTML.ForbiddenAttributes', array('style')); // id, on* etc. are already filtered by default
$cfg->set('URI.AllowedSchemes', array_fill_keys(common_url_schemes(), true));
if (isset($args['URI.Base'])) {
$cfg->set('URI.Base', $args['URI.Base']); // if null this is like unsetting it I presume
$cfg->set('URI.MakeAbsolute', !is_null($args['URI.Base'])); // if we have a URI base, convert relative URLs to absolute ones.
}
foreach (common_config('htmlpurifier') as $key=>$val) {
$cfg->set($key, $val);
}
// Remove more elements than what the default filter removes, default in GNU social are remotely
// linked resources such as img, video, audio
$forbiddenElements = array();
foreach (common_config('htmlfilter') as $tag=>$filter) {
if ($filter === true) {
$forbiddenElements[] = $tag;
}
}
$cfg->set('HTML.ForbiddenElements', $forbiddenElements);
$html = common_remove_unicode_formatting($html);
$purifier = new HTMLPurifier($cfg);
$purified = $purifier->purify($html);
Event::handle('EndCommonPurify', array(&$purified, $html));
return $purified;
}
function common_remove_unicode_formatting($text)
{
// Strip Unicode text formatting/direction codes
// this is pretty dangerous for visualisation of text and can be used for mischief
return preg_replace('/[\\x{200b}-\\x{200f}\\x{202a}-\\x{202e}]/u', '', $text);
}
/**
* Partial notice markup rendering step: build links to !group references.
*
* @param string $text partially rendered HTML
* @param Profile $author the Profile that is composing the current notice
* @param Notice $parent the Notice this is sent in reply to, if any
* @return string partially rendered HTML
*/
function common_render_content($text, Profile $author, Notice $parent=null)
{
$text = common_render_text($text);
$text = common_linkify_mentions($text, $author, $parent);
return $text;
}
/**
* Finds @-mentions within the partially-rendered text section and
* turns them into live links.
*
* Should generally not be called except from common_render_content().
*
* @param string $text partially-rendered HTML
* @param Profile $author the Profile that is composing the current notice
* @param Notice $parent the Notice this is sent in reply to, if any
* @return string partially-rendered HTML
*/
function common_linkify_mentions($text, Profile $author, Notice $parent=null)
{
$mentions = common_find_mentions($text, $author, $parent);
// We need to go through in reverse order by position,
// so our positions stay valid despite our fudging with the
// string!
$points = array();
foreach ($mentions as $mention)
{
$points[$mention['position']] = $mention;
}
krsort($points);
foreach ($points as $position => $mention) {
$linkText = common_linkify_mention($mention);
$text = substr_replace($text, $linkText, $position, $mention['length']);
}
return $text;
}
function common_linkify_mention(array $mention)
{
$output = null;
if (Event::handle('StartLinkifyMention', array($mention, &$output))) {
$xs = new XMLStringer(false);
$attrs = array('href' => $mention['url'],
'class' => 'h-card u-url p-nickname '.$mention['type']);
if (!empty($mention['title'])) {
$attrs['title'] = $mention['title'];
}
$xs->element('a', $attrs, $mention['text']);
$output = $xs->getString();
Event::handle('EndLinkifyMention', array($mention, &$output));
}
return $output;
}
function common_get_attentions($text, Profile $sender, Notice $parent=null)
{
$mentions = common_find_mentions($text, $sender, $parent);
$atts = array();
foreach ($mentions as $mention) {
foreach ($mention['mentioned'] as $mentioned) {
$atts[$mentioned->getUri()] = $mentioned->getObjectType();
}
}
if ($parent instanceof Notice) {
$parentAuthor = $parent->getProfile();
// afaik groups can't be authors
$atts[$parentAuthor->getUri()] = ActivityObject::PERSON;
}
return $atts;
}
/**
* Find @-mentions in the given text, using the given notice object as context.
* References will be resolved with common_relative_profile() against the user
* who posted the notice.
*
* Note the return data format is internal, to be used for building links and
* such. Should not be used directly; rather, call common_linkify_mentions().
*
* @param string $text
* @param Profile $sender the Profile that is sending the current text
* @param Notice $parent the Notice this text is in reply to, if any
*
* @return array
*
* @access private
*/
function common_find_mentions($text, Profile $sender, Notice $parent=null)
{
$mentions = array();
if (Event::handle('StartFindMentions', array($sender, $text, &$mentions))) {
// Get the context of the original notice, if any
$origMentions = array();
// Does it have a parent notice for context?
if ($parent instanceof Notice) {
foreach ($parent->getAttentionProfiles() as $repliedTo) {
if (!$repliedTo->isPerson()) {
continue;
}
$origMentions[$repliedTo->id] = $repliedTo;
}
}
$matches = common_find_mentions_raw($text, '@');
foreach ($matches as $match) {
try {
$nickname = Nickname::normalize($match[0]);
} catch (NicknameException $e) {
// Bogus match? Drop it.
continue;
}
// primarily mention the profiles mentioned in the parent
$mention_found_in_origMentions = false;
foreach($origMentions as $origMentionsId=>$origMention) {
if($origMention->getNickname() == $nickname) {
$mention_found_in_origMentions = $origMention;
// don't mention same twice! the parent might have mentioned
// two users with same nickname on different instances
unset($origMentions[$origMentionsId]);
break;
}
}
// Try to get a profile for this nickname.
// Start with parents mentions, then go to parents sender context
if ($mention_found_in_origMentions) {
$mentioned = $mention_found_in_origMentions;
} else if ($parent instanceof Notice && $parent->getProfile()->getNickname() === $nickname) {
$mentioned = $parent->getProfile();
} else {
// sets to null if no match
$mentioned = common_relative_profile($sender, $nickname);
}
if ($mentioned instanceof Profile) {
try {
$url = $mentioned->getUri(); // prefer the URI as URL, if it is one.
if (!common_valid_http_url($url)) {
$url = $mentioned->getUrl();
}
} catch (InvalidUrlException $e) {
$url = common_local_url('userbyid', array('id' => $mentioned->getID()));
}
$mention = array('mentioned' => array($mentioned),
'type' => 'mention',
'text' => $match[0],
'position' => $match[1],
'length' => mb_strlen($match[0]),
'title' => $mentioned->getFullname(),
'url' => $url);
$mentions[] = $mention;
}
}
// @#tag => mention of all subscriptions tagged 'tag'
preg_match_all('/'.Nickname::BEFORE_MENTIONS.'@#([\pL\pN_\-\.]{1,64})/',
$text, $hmatches, PREG_OFFSET_CAPTURE);
foreach ($hmatches[1] as $hmatch) {
$tag = common_canonical_tag($hmatch[0]);
$plist = Profile_list::getByTaggerAndTag($sender->getID(), $tag);
if (!$plist instanceof Profile_list || $plist->private) {
continue;
}
$tagged = $sender->getTaggedSubscribers($tag);
$url = common_local_url('showprofiletag',
array('nickname' => $sender->getNickname(),
'tag' => $tag));
$mentions[] = array('mentioned' => $tagged,
'type' => 'list',
'text' => $hmatch[0],
'position' => $hmatch[1],
'length' => mb_strlen($hmatch[0]),
'url' => $url);
}
preg_match_all('/'.Nickname::BEFORE_MENTIONS.'!(' . Nickname::DISPLAY_FMT . ')/',
$text, $hmatches, PREG_OFFSET_CAPTURE);
foreach ($hmatches[1] as $hmatch) {
$nickname = Nickname::normalize($hmatch[0]);
$group = User_group::getForNickname($nickname, $sender);
if (!$group instanceof User_group || !$sender->isMember($group)) {
continue;
}
$profile = $group->getProfile();
$mentions[] = array('mentioned' => array($profile),
'type' => 'group',
'text' => $hmatch[0],
'position' => $hmatch[1],
'length' => mb_strlen($hmatch[0]),
'url' => $group->permalink(),
'title' => $group->getFancyName());
}
Event::handle('EndFindMentions', array($sender, $text, &$mentions));
}
return $mentions;
}
/**
* Does the actual regex pulls to find @-mentions in text.
* Should generally not be called directly; for use in common_find_mentions.
*
* @param string $text
* @param string $preMention Character(s) that signals a mention ('@', '!'...)
* @return array of PCRE match arrays
*/
function common_find_mentions_raw($text, $preMention='@')
{
$tmatches = array();
preg_match_all('/^T (' . Nickname::DISPLAY_FMT . ') /',
$text,
$tmatches,
PREG_OFFSET_CAPTURE);
$atmatches = array();
// the regexp's "(?!\@)" makes sure it doesn't matches the single "@remote" in "@remote@server.com"
preg_match_all('/'.Nickname::BEFORE_MENTIONS.preg_quote($preMention, '/').'(' . Nickname::DISPLAY_FMT . ')\b(?!\@)/',
$text,
$atmatches,
PREG_OFFSET_CAPTURE);
$matches = array_merge($tmatches[1], $atmatches[1]);
return $matches;
}
function common_render_text($text)
{
$text = common_remove_unicode_formatting($text);
$text = nl2br(htmlspecialchars($text));
$text = preg_replace('/[\x{0}-\x{8}\x{b}-\x{c}\x{e}-\x{19}]/', '', $text);
$text = common_replace_urls_callback($text, 'common_linkify');
$text = preg_replace_callback('/(^|\"\;|\'|\(|\[|\{|\s+)#([\pL\pN_\-\.]{1,64})/u',
function ($m) { return "{$m[1]}#".common_tag_link($m[2]); }, $text);
// XXX: machine tags
return $text;
}
define('_URL_SCHEME_COLON_DOUBLE_SLASH', 1);
define('_URL_SCHEME_SINGLE_COLON', 2);
define('_URL_SCHEME_NO_DOMAIN', 4);
define('_URL_SCHEME_COLON_COORDINATES', 8);
function common_url_schemes($filter=null)
{
// TODO: move these to $config
$schemes = [
'http' => _URL_SCHEME_COLON_DOUBLE_SLASH,
'https' => _URL_SCHEME_COLON_DOUBLE_SLASH,
'ftp' => _URL_SCHEME_COLON_DOUBLE_SLASH,
'ftps' => _URL_SCHEME_COLON_DOUBLE_SLASH,
'mms' => _URL_SCHEME_COLON_DOUBLE_SLASH,
'rtsp' => _URL_SCHEME_COLON_DOUBLE_SLASH,
'gopher' => _URL_SCHEME_COLON_DOUBLE_SLASH,
'news' => _URL_SCHEME_COLON_DOUBLE_SLASH,
'nntp' => _URL_SCHEME_COLON_DOUBLE_SLASH,
'telnet' => _URL_SCHEME_COLON_DOUBLE_SLASH,
'wais' => _URL_SCHEME_COLON_DOUBLE_SLASH,
'file' => _URL_SCHEME_COLON_DOUBLE_SLASH,
'prospero' => _URL_SCHEME_COLON_DOUBLE_SLASH,
'webcal' => _URL_SCHEME_COLON_DOUBLE_SLASH,
'irc' => _URL_SCHEME_COLON_DOUBLE_SLASH,
'ircs' => _URL_SCHEME_COLON_DOUBLE_SLASH,
'aim' => _URL_SCHEME_SINGLE_COLON,
'bitcoin' => _URL_SCHEME_SINGLE_COLON,
'fax' => _URL_SCHEME_SINGLE_COLON,
'jabber' => _URL_SCHEME_SINGLE_COLON,
'mailto' => _URL_SCHEME_SINGLE_COLON,
'tel' => _URL_SCHEME_SINGLE_COLON,
'xmpp' => _URL_SCHEME_SINGLE_COLON,
'magnet' => _URL_SCHEME_NO_DOMAIN,
'geo' => _URL_SCHEME_COLON_COORDINATES,
];
return array_keys(
array_filter($schemes,
function ($scheme) use ($filter) {
return is_null($filter) || ($scheme & $filter);
})
);
}
/**
* Find links in the given text and pass them to the given callback function.
*
* @param string $text
* @param function($text, $arg) $callback: return replacement text
* @param mixed $arg: optional argument will be passed on to the callback
*/
function common_replace_urls_callback($text, $callback, $arg = null) {
$geouri_labeltext_regex = '\pN\pL\-';
$geouri_mark_regex = '\-\_\.\!\~\*\\\'\(\)'; // the \\\' is really pretty
$geouri_unreserved_regex = '\pN\pL' . $geouri_mark_regex;
$geouri_punreserved_regex = '\[\]\:\&\+\$';
$geouri_pctencoded_regex = '(?:\%[0-9a-fA-F][0-9a-fA-F])';
$geouri_paramchar_regex = $geouri_unreserved_regex . $geouri_punreserved_regex; //FIXME: add $geouri_pctencoded_regex here so it works
// Start off with a regex
$regex = '#'.
'(?:^|[\s\<\>\(\)\[\]\{\}\\\'\\\";]+)(?![\@\!\#])'.
'('.
'(?:'.
'(?:'. //Known protocols
'(?:'.
'(?:(?:' . implode('|', common_url_schemes(_URL_SCHEME_COLON_DOUBLE_SLASH)) . ')://)'.
'|'.
'(?:(?:' . implode('|', common_url_schemes(_URL_SCHEME_SINGLE_COLON)) . '):)'.
')'.
'(?:[\pN\pL\-\_\+\%\~]+(?::[\pN\pL\-\_\+\%\~]+)?\@)?'. //user:pass@
'(?:'.
'(?:'.
'\[[\pN\pL\-\_\:\.]+(?<![\.\:])\]'. //[dns]
')|(?:'.
'[\pN\pL\-\_\:\.]+(?<![\.\:])'. //dns
')'.
')'.
')'.
'|(?:'.
'(?:' . implode('|', common_url_schemes(_URL_SCHEME_COLON_COORDINATES)) . '):'.
// There's an order that must be followed here too, if ;crs= is used, it must precede ;u=
// Also 'crsp' (;crs=$crsp) must match $geouri_labeltext_regex
// Also 'uval' (;u=$uval) must be a pnum: \-?[0-9]+
'(?:'.
'(?:[0-9]+(?:\.[0-9]+)?(?:\,[0-9]+(?:\.[0-9]+)?){1,2})'. // 1(.23)?(,4(.56)){1,2}
'(?:\;(?:['.$geouri_labeltext_regex.']+)(?:\=['.$geouri_paramchar_regex.']+)*)*'.
')'.
')'.
// URLs without domain name, like magnet:?xt=...
'|(?:(?:' . implode('|', common_url_schemes(_URL_SCHEME_NO_DOMAIN)) . '):(?=\?))'. // zero-length lookahead requires ? after :
(common_config('linkify', 'bare_ipv4') // Convert IPv4 addresses to hyperlinks
? '|(?:(?: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]?)'
: '').
(common_config('linkify', 'bare_ipv6') // Convert IPv6 addresses to hyperlinks
? '|(?:'. //IPv6
'\[?(?:(?:(?:[0-9A-Fa-f]{1,4}:){7}(?:(?:[0-9A-Fa-f]{1,4})|:))|(?:(?:[0-9A-Fa-f]{1,4}:){6}(?::|(?:(?:25[0-5]|2[0-4]\d|[01]?\d{1,2})(?:\.(?:25[0-5]|2[0-4]\d|[01]?\d{1,2})){3})|(?::[0-9A-Fa-f]{1,4})))|(?:(?:[0-9A-Fa-f]{1,4}:){5}(?:(?::(?:(?:25[0-5]|2[0-4]\d|[01]?\d{1,2})(?:\.(?:25[0-5]|2[0-4]\d|[01]?\d{1,2})){3})?)|(?:(?::[0-9A-Fa-f]{1,4}){1,2})))|(?:(?:[0-9A-Fa-f]{1,4}:){4}(?::[0-9A-Fa-f]{1,4}){0,1}(?:(?::(?:(?:25[0-5]|2[0-4]\d|[01]?\d{1,2})(?:\.(?:25[0-5]|2[0-4]\d|[01]?\d{1,2})){3})?)|(?:(?::[0-9A-Fa-f]{1,4}){1,2})))|(?:(?:[0-9A-Fa-f]{1,4}:){3}(?::[0-9A-Fa-f]{1,4}){0,2}(?:(?::(?:(?:25[0-5]|2[0-4]\d|[01]?\d{1,2})(?:\.(?:25[0-5]|2[0-4]\d|[01]?\d{1,2})){3})?)|(?:(?::[0-9A-Fa-f]{1,4}){1,2})))|(?:(?:[0-9A-Fa-f]{1,4}:){2}(?::[0-9A-Fa-f]{1,4}){0,3}(?:(?::(?:(?:25[0-5]|2[0-4]\d|[01]?\d{1,2})(?:\.(?:25[0-5]|2[0-4]\d|[01]?\d{1,2})){3})?)|(?:(?::[0-9A-Fa-f]{1,4}){1,2})))|(?:(?:[0-9A-Fa-f]{1,4}:)(?::[0-9A-Fa-f]{1,4}){0,4}(?:(?::(?:(?:25[0-5]|2[0-4]\d|[01]?\d{1,2})(?:\.(?:25[0-5]|2[0-4]\d|[01]?\d{1,2})){3})?)|(?:(?::[0-9A-Fa-f]{1,4}){1,2})))|(?::(?::[0-9A-Fa-f]{1,4}){0,5}(?:(?::(?:(?:25[0-5]|2[0-4]\d|[01]?\d{1,2})(?:\.(?:25[0-5]|2[0-4]\d|[01]?\d{1,2})){3})?)|(?:(?::[0-9A-Fa-f]{1,4}){1,2})))|(?:(?:(?:25[0-5]|2[0-4]\d|[01]?\d{1,2})(?:\.(?:25[0-5]|2[0-4]\d|[01]?\d{1,2})){3})))\]?(?<!:)'.
')'
: '').
(common_config('linkify', 'bare_domains')
? '|(?:'. //DNS
'(?:[\pN\pL\-\_\+\%\~]+(?:\:[\pN\pL\-\_\+\%\~]+)?\@)?'. //user:pass@
'[\pN\pL\-\_]+(?:\.[\pN\pL\-\_]+)*\.'.
//tld list from http://data.iana.org/TLD/tlds-alpha-by-domain.txt, also added local, loc, and onion
'(?: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|ZONE|ZW|local|loc|onion)'.
')(?![\pN\pL\-\_])'
: '') . // if common_config('linkify', 'bare_domains') is false, don't add anything here
')'.
'(?:'.
'(?:\:\d+)?'. //:port
'(?:/[' . URL_REGEX_VALID_PATH_CHARS . ']*)?'. // path
'(?:\?[' . URL_REGEX_VALID_QSTRING_CHARS . ']*)?'. // ?query string
'(?:\#[' . URL_REGEX_VALID_FRAGMENT_CHARS . ']*)?'. // #fragment
')(?<!['. URL_REGEX_EXCLUDED_END_CHARS .'])'.
')'.
'#ixu';
//preg_match_all($regex,$text,$matches);
//print_r($matches);
return preg_replace_callback($regex, curry('callback_helper',$callback,$arg) ,$text);
}
/**
* Intermediate callback for common_replace_links(), helps resolve some
* ambiguous link forms before passing on to the final callback.
*
* @param array $matches
* @param callable $callback
* @param mixed $arg optional argument to pass on as second param to callback
* @return string
*
* @access private
*/
function callback_helper($matches, $callback, $arg=null) {
$url=$matches[1];
$left = strpos($matches[0],$url);
$right = $left+strlen($url);
$groupSymbolSets=array(
array(
'left'=>'(',
'right'=>')'
),
array(
'left'=>'[',
'right'=>']'
),
array(
'left'=>'{',
'right'=>'}'
),
array(
'left'=>'<',
'right'=>'>'
)
);
$cannotEndWith=array('.','?',',','#');
$original_url=$url;
do{
$original_url=$url;
foreach($groupSymbolSets as $groupSymbolSet){
if(substr($url,-1)==$groupSymbolSet['right']){
$group_left_count = substr_count($url,$groupSymbolSet['left']);
$group_right_count = substr_count($url,$groupSymbolSet['right']);
if($group_left_count<$group_right_count){
$right-=1;
$url=substr($url,0,-1);
}
}
}
if(in_array(substr($url,-1),$cannotEndWith)){
$right-=1;
$url=substr($url,0,-1);
}
}while($original_url!=$url);
$result = call_user_func_array($callback, array($url, $arg));
return substr($matches[0],0,$left) . $result . substr($matches[0],$right);
}
require_once INSTALLDIR . "/lib/curry.php";
function common_linkify($url) {
// It comes in special'd, so we unspecial it before passing to the stringifying
// functions
$url = htmlspecialchars_decode($url);
if (strpos($url, '@') !== false && strpos($url, ':') === false && Validate::email($url)) {
//url is an email address without the mailto: protocol
$canon = "mailto:$url";
$longurl = "mailto:$url";
} else {
$canon = File_redirection::_canonUrl($url);
$longurl_data = File_redirection::where($canon, common_config('attachments', 'process_links'));
if(isset($longurl_data->redir_url)) {
$longurl = $longurl_data->redir_url;
} else {
// e.g. local files
$longurl = $longurl_data->url;
}
}
$attrs = array('href' => $longurl, 'title' => $longurl);
$is_attachment = false;
$attachment_id = null;
$has_thumb = false;
// Check to see whether this is a known "attachment" URL.
try {
$f = File::getByUrl($longurl);
} catch (NoResultException $e) {
if (common_config('attachments', 'process_links')) {
// XXX: this writes to the database. :<
try {
$f = File::processNew($longurl);
} catch (ServerException $e) {
$f = null;
}
}
}
if ($f instanceof File) {
try {
$enclosure = $f->getEnclosure();
$is_attachment = true;
$attachment_id = $f->id;
$thumb = File_thumbnail::getKV('file_id', $f->id);
$has_thumb = ($thumb instanceof File_thumbnail);
} catch (ServerException $e) {
// There was not enough metadata available
}
}
// Whether to nofollow
$nf = common_config('nofollow', 'external');
if ($nf == 'never') {
$attrs['rel'] = 'external';
} else {
$attrs['rel'] = 'nofollow external';
}
// Add clippy
if ($is_attachment) {
$attrs['class'] = 'attachment';
if ($has_thumb) {
$attrs['class'] = 'attachment thumbnail';
}
$attrs['id'] = "attachment-{$attachment_id}";
$attrs['rel'] .= ' noreferrer';
}
return XMLStringer::estring('a', $attrs, $url);
}
/**
* Find and shorten links in a given chunk of text if it's longer than the
* configured notice content limit (or unconditionally).
*
* Side effects: may save file and file_redirection records for referenced URLs.
*
* Pass the $user option or call $user->shortenLinks($text) to ensure the proper
* user's options are used; otherwise the current web session user's setitngs
* will be used or ur1.ca if there is no active web login.
*
* @param string $text
* @param boolean $always (optional)
* @param User $user (optional)
*
* @return string
*/
function common_shorten_links($text, $always = false, User $user=null)
{
if ($user === null) {
$user = common_current_user();
}
$maxLength = User_urlshortener_prefs::maxNoticeLength($user);
if ($always || ($maxLength != -1 && mb_strlen($text) > $maxLength)) {
return common_replace_urls_callback($text, array('File_redirection', 'forceShort'), $user);
} else {
return common_replace_urls_callback($text, array('File_redirection', 'makeShort'), $user);
}
}
/**
* Very basic stripping of invalid UTF-8 input text.
*
* @param string $str
* @return mixed string or null if invalid input
*
* @todo ideally we should drop bad chars, and maybe do some of the checks
* from common_xml_safe_str. But we can't strip newlines, etc.
* @todo Unicode normalization might also be useful, but not needed now.
*/
function common_validate_utf8($str)
{
// preg_replace will return NULL on invalid UTF-8 input.
//
// Note: empty regex //u also caused NULL return on some
// production machines, but none of our test machines.
//
// This should be replaced with a more reliable check.
return preg_replace('/\x00/u', '', $str);
}
/**
* Make sure an arbitrary string is safe for output in XML as a single line.
*
* @param string $str
* @return string
*/
function common_xml_safe_str($str)
{
// Replace common eol and extra whitespace input chars
$unWelcome = array(
"\t", // tab
"\n", // newline
"\r", // cr
"\0", // null byte eos
"\x0B" // vertical tab
);
$replacement = array(
' ', // single space
' ',
'', // nothing
'',
' '
);
$str = str_replace($unWelcome, $replacement, $str);
// Neutralize any additional control codes and UTF-16 surrogates
// (Twitter uses '*')
return preg_replace('/[\p{Cc}\p{Cs}]/u', '*', $str);
}
function common_slugify($str)
{
// php5-intl is highly recommended...
if (!function_exists('transliterator_transliterate')) {
$str = preg_replace('/[^\pL\pN]/u', '', $str);
$str = mb_convert_case($str, MB_CASE_LOWER, 'UTF-8');
$str = substr($str, 0, 64);
return $str;
}
$str = transliterator_transliterate(
'Any-Latin;' . // any charset to latin compatible
'NFD;' . // decompose
'[:Nonspacing Mark:] Remove;' . // remove nonspacing marks (accents etc.)
'NFC;' . // composite again
'[:Punctuation:] Remove;' . // remove punctuation (.,¿? etc.)
'Lower();' . // turn into lowercase
'Latin-ASCII;', // get ASCII equivalents (ð to d for example)
$str);
return preg_replace('/[^\pL\pN]/', '', $str);
}
function common_tag_link($tag)
{
$canonical = common_canonical_tag($tag);
if (common_config('singleuser', 'enabled')) {
// regular TagAction isn't set up in 1user mode
$nickname = User::singleUserNickname();
$url = common_local_url('showstream',
array('nickname' => $nickname,
'tag' => $canonical));
} else {
$url = common_local_url('tag', array('tag' => $canonical));
}
$xs = new XMLStringer();
$xs->elementStart('span', 'tag');
$xs->element('a', array('href' => $url,
'rel' => 'tag'),
$tag);
$xs->elementEnd('span');
return $xs->getString();
}
function common_canonical_tag($tag)
{
$tag = common_slugify($tag);
$tag = substr($tag, 0, 64);
return $tag;
}
function common_valid_profile_tag($str)
{
return preg_match('/^[A-Za-z0-9_\-\.]{1,64}$/', $str);
}
/**
* Resolve an ambiguous profile nickname reference, checking in following order:
* - profiles that $sender subscribes to
* - profiles that subscribe to $sender
* - local user profiles
*
* WARNING: does not validate or normalize $nickname -- MUST BE PRE-VALIDATED
* OR THERE MAY BE A RISK OF SQL INJECTION ATTACKS. THIS FUNCTION DOES NOT
* ESCAPE SQL.
*
* @fixme validate input
* @fixme escape SQL
* @fixme fix or remove mystery third parameter
* @fixme is $sender a User or Profile?
*
* @param <type> $sender the user or profile in whose context we're looking
* @param string $nickname validated nickname of
* @param <type> $dt unused mystery parameter; in Notice reply-to handling a timestamp is passed.
*
* @return Profile or null
*/
function common_relative_profile($sender, $nickname, $dt=null)
{
// Will throw exception on invalid input.
$nickname = Nickname::normalize($nickname);
// Try to find profiles this profile is subscribed to that have this nickname
$recipient = new Profile();
// XXX: use a join instead of a subquery
$recipient->whereAdd('EXISTS (SELECT subscribed from subscription where subscriber = '.intval($sender->id).' and subscribed = id)', 'AND');
$recipient->whereAdd("nickname = '" . $recipient->escape($nickname) . "'", 'AND');
if ($recipient->find(true)) {
// XXX: should probably differentiate between profiles with
// the same name by date of most recent update
return $recipient;
}
// Try to find profiles that listen to this profile and that have this nickname
$recipient = new Profile();
// XXX: use a join instead of a subquery
$recipient->whereAdd('EXISTS (SELECT subscriber from subscription where subscribed = '.intval($sender->id).' and subscriber = id)', 'AND');
$recipient->whereAdd("nickname = '" . $recipient->escape($nickname) . "'", 'AND');
if ($recipient->find(true)) {
// XXX: should probably differentiate between profiles with
// the same name by date of most recent update
return $recipient;
}
// If this is a local user, try to find a local user with that nickname.
$sender = User::getKV('id', $sender->id);
if ($sender instanceof User) {
$recipient_user = User::getKV('nickname', $nickname);
if ($recipient_user instanceof User) {
return $recipient_user->getProfile();
}
}
// Otherwise, no links. @messages from local users to remote users,
// or from remote users to other remote users, are just
// outside our ability to make intelligent guesses about
return null;
}
function common_local_url($action, $args=null, $params=null, $fragment=null, $addSession=true)
{
if (Event::handle('StartLocalURL', array(&$action, &$params, &$fragment, &$addSession, &$url))) {
$r = Router::get();
$path = $r->build($action, $args, $params, $fragment);
$ssl = GNUsocial::useHTTPS();
if (common_config('site','fancy')) {
$url = common_path($path, $ssl, $addSession);
} else {
if (mb_strpos($path, '/index.php') === 0) {
$url = common_path($path, $ssl, $addSession);
} else {
$url = common_path('index.php/'.$path, $ssl, $addSession);
}
}
Event::handle('EndLocalURL', array(&$action, &$params, &$fragment, &$addSession, &$url));
}
return $url;
}
function common_path($relative, $ssl=false, $addSession=true)
{
$pathpart = (common_config('site', 'path')) ? common_config('site', 'path')."/" : '';
if ($ssl && GNUsocial::useHTTPS()) {
$proto = 'https';
if (is_string(common_config('site', 'sslserver')) &&
mb_strlen(common_config('site', 'sslserver')) > 0) {
$serverpart = common_config('site', 'sslserver');
} else if (common_config('site', 'server')) {
$serverpart = common_config('site', 'server');
} else {
common_log(LOG_ERR, 'Site server not configured, unable to determine site name.');
}
} else {
$proto = 'http';
if (common_config('site', 'server')) {
$serverpart = common_config('site', 'server');
} else {
common_log(LOG_ERR, 'Site server not configured, unable to determine site name.');
}
}
if ($addSession) {
$relative = common_inject_session($relative, $serverpart);
}
return $proto.'://'.$serverpart.'/'.$pathpart.$relative;
}
// FIXME: Maybe this should also be able to handle non-fancy URLs with index.php?p=...
function common_fake_local_fancy_url($url)
{
/**
* This is a hacky fix to make URIs generated with "index.php/" match against
* locally stored URIs without that. So for example if the remote site is looking
* up the webfinger for some user and for some reason knows about https://some.example/user/1
* but we locally store and report only https://some.example/index.php/user/1 then they would
* dismiss the profile for not having an identified alias.
*
* There are various live instances where these issues occur, for various reasons.
* Most of them being users fiddling with configuration while already having
* started federating (distributing the URI to other servers) or maybe manually
* editing the local database.
*/
if (!preg_match(
// [1] protocol part, we can only rewrite http/https anyway.
'/^(https?:\/\/)' .
// [2] site name.
// FIXME: Dunno how this acts if we're aliasing ourselves with a .onion domain etc.
'('.preg_quote(common_config('site', 'server'), '/').')' .
// [3] site path, or if that is empty just '/' (to retain the /)
'('.preg_quote(common_config('site', 'path') ?: '/', '/').')' .
// [4] + [5] extract index.php (+ possible leading double /) and the rest of the URL separately.
'(\/?index\.php\/)(.*)$/', $url, $matches)) {
// if preg_match failed to match
throw new Exception('No known change could be made to the URL.');
}
// now reconstruct the URL with everything except the "index.php/" part
$fancy_url = '';
foreach ([1,2,3,5] as $idx) {
$fancy_url .= $matches[$idx];
}
return $fancy_url;
}
// FIXME: Maybe this should also be able to handle non-fancy URLs with index.php?p=...
function common_fake_local_nonfancy_url($url)
{
/**
* This is a hacky fix to make URIs NOT generated with "index.php/" match against
* locally stored URIs WITH that. The reverse from the above.
*
* It will also "repair" index.php URLs with multiple / prepended. Like https://some.example///index.php/user/1
*/
if (!preg_match(
// [1] protocol part, we can only rewrite http/https anyway.
'/^(https?:\/\/)' .
// [2] site name.
// FIXME: Dunno how this acts if we're aliasing ourselves with a .onion domain etc.
'('.preg_quote(common_config('site', 'server'), '/').')' .
// [3] site path, or if that is empty just '/' (to retain the /)
'('.preg_quote(common_config('site', 'path') ?: '/', '/').')' .
// [4] should be empty (might contain one or more / and then maybe also index.php). Will be overwritten.
// [5] will have the extracted actual URL part (besides site path)
'((?!index.php\/)\/*(?:index.php\/)?)(.*)$/', $url, $matches)) {
// if preg_match failed to match
throw new Exception('No known change could be made to the URL.');
}
$matches[4] = 'index.php/'; // inject the index.php/ rewritethingy
// remove the first element, which is the full matching string
array_shift($matches);
return implode($matches);
}
function common_inject_session($url, $serverpart = null)
{
if (!common_have_session()) {
return $url;
}
if (empty($serverpart)) {
$serverpart = parse_url($url, PHP_URL_HOST);
}
$currentServer = (array_key_exists('HTTP_HOST', $_SERVER)) ? $_SERVER['HTTP_HOST'] : null;
// Are we pointing to another server (like an SSL server?)
if (!empty($currentServer) && 0 != strcasecmp($currentServer, $serverpart)) {
// Pass the session ID as a GET parameter
$sesspart = session_name() . '=' . session_id();
$i = strpos($url, '?');
if ($i === false) { // no GET params, just append
$url .= '?' . $sesspart;
} else {
$url = substr($url, 0, $i + 1).$sesspart.'&'.substr($url, $i + 1);
}
}
return $url;
}
function common_date_string($dt)
{
// XXX: do some sexy date formatting
// return date(DATE_RFC822, $dt);
$t = strtotime($dt);
$now = time();
$diff = $now - $t;
if ($now < $t) { // that shouldn't happen!
return common_exact_date($dt);
} else if ($diff < 60) {
// TRANS: Used in notices to indicate when the notice was made compared to now.
return _('a few seconds ago');
} else if ($diff < 92) {
// TRANS: Used in notices to indicate when the notice was made compared to now.
return _('about a minute ago');
} else if ($diff < 3300) {
$minutes = round($diff/60);
// TRANS: Used in notices to indicate when the notice was made compared to now.
return sprintf( _m('about one minute ago', 'about %d minutes ago', $minutes), $minutes);
} else if ($diff < 5400) {
// TRANS: Used in notices to indicate when the notice was made compared to now.
return _('about an hour ago');
} else if ($diff < 22 * 3600) {
$hours = round($diff/3600);
// TRANS: Used in notices to indicate when the notice was made compared to now.
return sprintf( _m('about one hour ago', 'about %d hours ago', $hours), $hours);
} else if ($diff < 37 * 3600) {
// TRANS: Used in notices to indicate when the notice was made compared to now.
return _('about a day ago');
} else if ($diff < 24 * 24 * 3600) {
$days = round($diff/(24*3600));
// TRANS: Used in notices to indicate when the notice was made compared to now.
return sprintf( _m('about one day ago', 'about %d days ago', $days), $days);
} else if ($diff < 46 * 24 * 3600) {
// TRANS: Used in notices to indicate when the notice was made compared to now.
return _('about a month ago');
} else if ($diff < 330 * 24 * 3600) {
$months = round($diff/(30*24*3600));
// TRANS: Used in notices to indicate when the notice was made compared to now.
return sprintf( _m('about one month ago', 'about %d months ago',$months), $months);
} else if ($diff < 480 * 24 * 3600) {
// TRANS: Used in notices to indicate when the notice was made compared to now.
return _('about a year ago');
} else {
return common_exact_date($dt);
}
}
function common_exact_date($dt)
{
static $_utc;
static $_siteTz;
if (!$_utc) {
$_utc = new DateTimeZone('UTC');
$_siteTz = new DateTimeZone(common_timezone());
}
$dateStr = date('d F Y H:i:s', strtotime($dt));
$d = new DateTime($dateStr, $_utc);
$d->setTimezone($_siteTz);
// TRANS: Human-readable full date-time specification (formatting on http://php.net/date)
return $d->format(_('l, d-M-Y H:i:s T'));
}
function common_date_w3dtf($dt)
{
$dateStr = date('d F Y H:i:s', strtotime($dt));
$d = new DateTime($dateStr, new DateTimeZone('UTC'));
$d->setTimezone(new DateTimeZone(common_timezone()));
return $d->format(DATE_W3C);
}
function common_date_rfc2822($dt)
{
$dateStr = date('d F Y H:i:s', strtotime($dt));
$d = new DateTime($dateStr, new DateTimeZone('UTC'));
$d->setTimezone(new DateTimeZone(common_timezone()));
return $d->format('r');
}
function common_date_iso8601($dt)
{
$dateStr = date('d F Y H:i:s', strtotime($dt));
$d = new DateTime($dateStr, new DateTimeZone('UTC'));
$d->setTimezone(new DateTimeZone(common_timezone()));
return $d->format('c');
}
function common_sql_now()
{
return common_sql_date(time());
}
function common_sql_date($datetime)
{
return strftime('%Y-%m-%d %H:%M:%S', $datetime);
}
/**
* Return an SQL fragment to calculate an age-based weight from a given
* timestamp or datetime column.
*
* @param string $column name of field we're comparing against current time
* @param integer $dropoff divisor for age in seconds before exponentiation
* @return string SQL fragment
*/
function common_sql_weight($column, $dropoff)
{
if (common_config('db', 'type') == 'pgsql') {
// PostgreSQL doesn't support timestampdiff function.
// @fixme will this use the right time zone?
// @fixme does this handle cross-year subtraction correctly?
return "sum(exp(-extract(epoch from (now() - $column)) / $dropoff))";
} else {
return "sum(exp(timestampdiff(second, utc_timestamp(), $column) / $dropoff))";
}
}
function common_redirect($url, $code=307)
{
static $status = array(301 => "Moved Permanently",
302 => "Found",
303 => "See Other",
307 => "Temporary Redirect");
header('HTTP/1.1 '.$code.' '.$status[$code]);
header("Location: $url");
header("Connection: close");
$xo = new XMLOutputter();
$xo->startXML('a',
'-//W3C//DTD XHTML 1.0 Strict//EN',
'http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd');
$xo->element('a', array('href' => $url), $url);
$xo->endXML();
exit;
}
// Stick the notice on the queue
function common_enqueue_notice($notice)
{
static $localTransports = array('ping');
$transports = array();
if (common_config('sms', 'enabled')) {
$transports[] = 'sms';
}
if (Event::hasHandler('HandleQueuedNotice')) {
$transports[] = 'plugin';
}
// We can skip these for gatewayed notices.
if ($notice->isLocal()) {
$transports = array_merge($transports, $localTransports);
}
if (Event::handle('StartEnqueueNotice', array($notice, &$transports))) {
$qm = QueueManager::get();
foreach ($transports as $transport)
{
$qm->enqueue($notice, $transport);
}
Event::handle('EndEnqueueNotice', array($notice, $transports));
}
return true;
}
function common_profile_url($nickname)
{
return common_local_url('showstream', array('nickname' => $nickname),
null, null, false);
}
/**
* Should make up a reasonable root URL
*
* @param bool $tls true or false to force TLS scheme, null to use server configuration
*/
function common_root_url($tls=null)
{
if (is_null($tls)) {
$tls = GNUsocial::useHTTPS();
}
$url = common_path('', $tls, false);
$i = strpos($url, '?');
if ($i !== false) {
$url = substr($url, 0, $i);
}
return $url;
}
/**
* returns $bytes bytes of raw random data
*/
function common_random_rawstr($bytes)
{
$rawstr = @file_exists('/dev/urandom')
? common_urandom($bytes)
: common_mtrand($bytes);
return $rawstr;
}
/**
* returns $bytes bytes of random data as a hexadecimal string
*/
function common_random_hexstr($bytes)
{
$str = common_random_rawstr($bytes);
$hexstr = '';
for ($i = 0; $i < $bytes; $i++) {
$hexstr .= sprintf("%02x", ord($str[$i]));
}
return $hexstr;
}
function common_urandom($bytes)
{
$h = fopen('/dev/urandom', 'rb');
// should not block
$src = fread($h, $bytes);
fclose($h);
return $src;
}
function common_mtrand($bytes)
{
$str = '';
for ($i = 0; $i < $bytes; $i++) {
$str .= chr(mt_rand(0, 255));
}
return $str;
}
/**
* Record the given URL as the return destination for a future
* form submission, to be read by common_get_returnto().
*
* @param string $url
*
* @fixme as a session-global setting, this can allow multiple forms
* to conflict and overwrite each others' returnto destinations if
* the user has multiple tabs or windows open.
*
* Should refactor to index with a token or otherwise only pass the
* data along its intended path.
*/
function common_set_returnto($url)
{
common_ensure_session();
$_SESSION['returnto'] = $url;
}
/**
* Fetch a return-destination URL previously recorded by
* common_set_returnto().
*
* @return mixed URL string or null
*
* @fixme as a session-global setting, this can allow multiple forms
* to conflict and overwrite each others' returnto destinations if
* the user has multiple tabs or windows open.
*
* Should refactor to index with a token or otherwise only pass the
* data along its intended path.
*/
function common_get_returnto()
{
common_ensure_session();
return (array_key_exists('returnto', $_SESSION)) ? $_SESSION['returnto'] : null;
}
function common_timestamp()
{
return date('YmdHis');
}
function common_ensure_syslog()
{
static $initialized = false;
if (!$initialized) {
openlog(common_config('syslog', 'appname'), 0,
common_config('syslog', 'facility'));
$initialized = true;
}
}
function common_log_line($priority, $msg)
{
static $syslog_priorities = array('LOG_EMERG', 'LOG_ALERT', 'LOG_CRIT', 'LOG_ERR',
'LOG_WARNING', 'LOG_NOTICE', 'LOG_INFO', 'LOG_DEBUG');
return date('Y-m-d H:i:s') . ' ' . $syslog_priorities[$priority] . ': ' . $msg . PHP_EOL;
}
function common_request_id()
{
$pid = getmypid();
$server = common_config('site', 'server');
if (php_sapi_name() == 'cli') {
$script = basename($_SERVER['PHP_SELF']);
return "$server:$script:$pid";
} else {
static $req_id = null;
if (!isset($req_id)) {
$req_id = substr(md5(mt_rand()), 0, 8);
}
if (isset($_SERVER['REQUEST_URI'])) {
$url = $_SERVER['REQUEST_URI'];
}
$method = $_SERVER['REQUEST_METHOD'];
return "$server:$pid.$req_id $method $url";
}
}
function common_log($priority, $msg, $filename=null)
{
if(Event::handle('StartLog', array(&$priority, &$msg, &$filename))){
$msg = (empty($filename)) ? $msg : basename($filename) . ' - ' . $msg;
$msg = '[' . common_request_id() . '] ' . $msg;
$logfile = common_config('site', 'logfile');
if ($logfile) {
$log = fopen($logfile, "a");
if ($log) {
$output = common_log_line($priority, $msg);
fwrite($log, $output);
fclose($log);
}
} else {
common_ensure_syslog();
syslog($priority, $msg);
}
Event::handle('EndLog', array($priority, $msg, $filename));
}
}
function common_debug($msg, $filename=null)
{
if ($filename) {
common_log(LOG_DEBUG, basename($filename).' - '.$msg);
} else {
common_log(LOG_DEBUG, $msg);
}
}
function common_log_db_error(&$object, $verb, $filename=null)
{
global $_PEAR;
$objstr = common_log_objstring($object);
$last_error = &$_PEAR->getStaticProperty('DB_DataObject','lastError');
if (is_object($last_error)) {
$msg = $last_error->message;
} else {
$msg = 'Unknown error (' . var_export($last_error, true) . ')';
}
common_log(LOG_ERR, $msg . '(' . $verb . ' on ' . $objstr . ')', $filename);
}
function common_log_objstring(&$object)
{
if (is_null($object)) {
return "null";
}
if (!($object instanceof DB_DataObject)) {
return "(unknown)";
}
$arr = $object->toArray();
$fields = array();
foreach ($arr as $k => $v) {
if (is_object($v)) {
$fields[] = "$k='".get_class($v)."'";
} else {
$fields[] = "$k='$v'";
}
}
$objstring = $object->tableName() . '[' . implode(',', $fields) . ']';
return $objstring;
}
function common_valid_http_url($url, $secure=false)
{
if (empty($url)) {
return false;
}
// If $secure is true, only allow https URLs to pass
// (if false, we use '?' in 'https?' to say the 's' is optional)
$regex = $secure ? '/^https$/' : '/^https?$/';
return filter_var($url, FILTER_VALIDATE_URL)
&& preg_match($regex, parse_url($url, PHP_URL_SCHEME));
}
function common_valid_tag($tag)
{
if (preg_match('/^tag:(.*?),(\d{4}(-\d{2}(-\d{2})?)?):(.*)$/', $tag, $matches)) {
return (Validate::email($matches[1]) ||
preg_match('/^([\w-\.]+)$/', $matches[1]));
}
return false;
}
/**
* Determine if given domain or address literal is valid
* eg for use in JIDs and URLs. Does not check if the domain
* exists!
*
* @param string $domain
* @return boolean valid or not
*/
function common_valid_domain($domain)
{
$octet = "(?:25[0-5]|2[0-4][0-9]|1[0-9]{2}|[1-9][0-9]|[0-9])";
$ipv4 = "(?:$octet(?:\.$octet){3})";
if (preg_match("/^$ipv4$/u", $domain)) return true;
$group = "(?:[0-9a-f]{1,4})";
$ipv6 = "(?:\[($group(?::$group){0,7})?(::)?($group(?::$group){0,7})?\])"; // http://tools.ietf.org/html/rfc3513#section-2.2
if (preg_match("/^$ipv6$/ui", $domain, $matches)) {
$before = explode(":", $matches[1]);
$zeroes = $matches[2];
$after = explode(":", $matches[3]);
if ($zeroes) {
$min = 0;
$max = 7;
} else {
$min = 1;
$max = 8;
}
$explicit = count($before) + count($after);
if ($explicit < $min || $explicit > $max) {
return false;
}
return true;
}
try {
require_once "Net/IDNA.php";
$idn = Net_IDNA::getInstance();
$domain = $idn->encode($domain);
} catch (Exception $e) {
return false;
}
$subdomain = "(?:[a-z0-9][a-z0-9-]*)"; // @fixme
$fqdn = "(?:$subdomain(?:\.$subdomain)*\.?)";
return preg_match("/^$fqdn$/ui", $domain);
}
/* Following functions are copied from MediaWiki GlobalFunctions.php
* and written by Evan Prodromou. */
function common_accept_to_prefs($accept, $def = '*/*')
{
// No arg means accept anything (per HTTP spec)
if(!$accept) {
return array($def => 1);
}
$prefs = array();
$parts = explode(',', $accept);
foreach($parts as $part) {
// FIXME: doesn't deal with params like 'text/html; level=1'
@list($value, $qpart) = explode(';', trim($part));
$match = array();
if(!isset($qpart)) {
$prefs[$value] = 1;
} elseif(preg_match('/q\s*=\s*(\d*\.\d+)/', $qpart, $match)) {
$prefs[$value] = $match[1];
}
}
return $prefs;
}
// Match by our supported file extensions
function common_supported_filename_to_mime($filename)
{
// Accept a filename and take out the extension
if (strpos($filename, '.') === false) {
throw new ServerException(sprintf('No extension on filename: %1$s', _ve($filename)));
}
$fileext = substr(strrchr($filename, '.'), 1);
return common_supported_ext_to_mime($fileext);
}
function common_supported_ext_to_mime($fileext)
{
$supported = common_config('attachments', 'supported');
if ($supported === true) {
// FIXME: Should we just accept the extension straight off when supported === true?
throw new UnknownExtensionMimeException($fileext);
}
foreach($supported as $type => $ext) {
if ($ext === $fileext) {
return $type;
}
}
throw new ServerException('Unsupported file extension');
}
// Match by our supported mime types
function common_supported_mime_to_ext($mimetype)
{
$supported = common_config('attachments', 'supported');
if (is_array($supported)) {
foreach($supported as $type => $ext) {
if ($mimetype === $type) {
return $ext;
}
}
}
throw new UnknownMimeExtensionException($mimetype);
}
// The MIME "media" is the part before the slash (video in video/webm)
function common_get_mime_media($type)
{
$tmp = explode('/', $type);
return strtolower($tmp[0]);
}
// Get only the mimetype and not additional info (separated from bare mime with semi-colon)
function common_bare_mime($mimetype)
{
$mimetype = mb_strtolower($mimetype);
if ($semicolon = mb_strpos($mimetype, ';')) {
$mimetype = mb_substr($mimetype, 0, $semicolon);
}
return trim($mimetype);
}
function common_mime_type_match($type, $avail)
{
if(array_key_exists($type, $avail)) {
return $type;
} else {
$parts = explode('/', $type);
if(array_key_exists($parts[0] . '/*', $avail)) {
return $parts[0] . '/*';
} elseif(array_key_exists('*/*', $avail)) {
return '*/*';
} else {
return null;
}
}
}
function common_negotiate_type($cprefs, $sprefs)
{
$combine = array();
foreach(array_keys($sprefs) as $type) {
$parts = explode('/', $type);
if($parts[1] != '*') {
$ckey = common_mime_type_match($type, $cprefs);
if($ckey) {
$combine[$type] = $sprefs[$type] * $cprefs[$ckey];
}
}
}
foreach(array_keys($cprefs) as $type) {
$parts = explode('/', $type);
if($parts[1] != '*' && !array_key_exists($type, $sprefs)) {
$skey = common_mime_type_match($type, $sprefs);
if($skey) {
$combine[$type] = $sprefs[$skey] * $cprefs[$type];
}
}
}
$bestq = 0;
$besttype = 'text/html';
foreach(array_keys($combine) as $type) {
if($combine[$type] > $bestq) {
$besttype = $type;
$bestq = $combine[$type];
}
}
if ('text/html' === $besttype) {
return "text/html; charset=utf-8";
}
return $besttype;
}
function common_config($main, $sub=null)
{
global $config;
if (is_null($sub)) {
// Return the config category array
return array_key_exists($main, $config) ? $config[$main] : array();
}
// Return the config value
return (array_key_exists($main, $config) &&
array_key_exists($sub, $config[$main])) ? $config[$main][$sub] : false;
}
function common_config_set($main, $sub, $value)
{
global $config;
if (!array_key_exists($main, $config)) {
$config[$main] = array();
}
$config[$main][$sub] = $value;
}
function common_config_append($main, $sub, $value)
{
global $config;
if (!array_key_exists($main, $config)) {
$config[$main] = array();
}
if (!array_key_exists($sub, $config[$main])) {
$config[$main][$sub] = array();
}
if (!is_array($config[$main][$sub])) {
$config[$main][$sub] = array($config[$main][$sub]);
}
array_push($config[$main][$sub], $value);
}
/**
* Pull arguments from a GET/POST/REQUEST array with first-level input checks:
* strips "magic quotes" slashes if necessary, and kills invalid UTF-8 strings.
*
* @param array $from
* @return array
*/
function common_copy_args($from)
{
$to = array();
$strip = get_magic_quotes_gpc();
foreach ($from as $k => $v) {
if(is_array($v)) {
$to[$k] = common_copy_args($v);
} else {
if ($strip) {
$v = stripslashes($v);
}
$to[$k] = strval(common_validate_utf8($v));
}
}
return $to;
}
/**
* Neutralise the evil effects of magic_quotes_gpc in the current request.
* This is used before handing a request off to OAuthRequest::from_request.
* @fixme Doesn't consider vars other than _POST and _GET?
* @fixme Can't be undone and could corrupt data if run twice.
*/
function common_remove_magic_from_request()
{
if(get_magic_quotes_gpc()) {
$_POST=array_map('stripslashes',$_POST);
$_GET=array_map('stripslashes',$_GET);
}
}
function common_user_uri(&$user)
{
return common_local_url('userbyid', array('id' => $user->id),
null, null, false);
}
// 36 alphanums - lookalikes (0, O, 1, I) = 32 chars = 5 bits
function common_confirmation_code($bits)
{
// 36 alphanums - lookalikes (0, O, 1, I) = 32 chars = 5 bits
static $codechars = '23456789ABCDEFGHJKLMNPQRSTUVWXYZ';
$chars = ceil($bits/5);
$code = '';
for ($i = 0; $i < $chars; $i++) {
// XXX: convert to string and back
$num = hexdec(common_random_hexstr(1));
// XXX: randomness is too precious to throw away almost
// 40% of the bits we get!
$code .= $codechars[$num%32];
}
return $code;
}
// convert markup to HTML
function common_markup_to_html($c, $args=null)
{
if ($c === null) {
return '';
}
if (is_null($args)) {
$args = array();
}
// XXX: not very efficient
foreach ($args as $name => $value) {
$c = preg_replace('/%%arg.'.$name.'%%/', $value, $c);
}
$c = preg_replace_callback('/%%user.(\w+)%%/', function ($m) { return common_user_property($m[1]); }, $c);
$c = preg_replace_callback('/%%action.(\w+)%%/', function ($m) { return common_local_url($m[1]); }, $c);
$c = preg_replace_callback('/%%doc.(\w+)%%/', function ($m) { return common_local_url('doc', array('title'=>$m[1])); }, $c);
$c = preg_replace_callback('/%%(\w+).(\w+)%%/', function ($m) { return common_config($m[1], $m[2]); }, $c);
return \Michelf\Markdown::defaultTransform($c);
}
function common_user_property($property)
{
$profile = Profile::current();
if (empty($profile)) {
return null;
}
switch ($property) {
case 'profileurl':
case 'nickname':
case 'fullname':
case 'location':
case 'bio':
return $profile->$property;
break;
case 'avatar':
try {
return $profile->getAvatar(AVATAR_STREAM_SIZE);
} catch (Exception $e) {
return null;
}
break;
case 'bestname':
return $profile->getBestName();
break;
default:
return null;
}
}
function common_profile_uri($profile)
{
$uri = null;
if (!empty($profile)) {
if (Event::handle('StartCommonProfileURI', array($profile, &$uri))) {
$user = User::getKV('id', $profile->id);
if ($user instanceof User) {
$uri = $user->getUri();
}
Event::handle('EndCommonProfileURI', array($profile, &$uri));
}
}
// XXX: this is a very bad profile!
return $uri;
}
function common_canonical_sms($sms)
{
// strip non-digits
preg_replace('/\D/', '', $sms);
return $sms;
}
function common_error_handler($errno, $errstr, $errfile, $errline, $errcontext)
{
switch ($errno) {
case E_ERROR:
case E_COMPILE_ERROR:
case E_CORE_ERROR:
case E_USER_ERROR:
case E_PARSE:
case E_RECOVERABLE_ERROR:
common_log(LOG_ERR, "[$errno] $errstr ($errfile:$errline) [ABORT]");
die();
break;
case E_WARNING:
case E_COMPILE_WARNING:
case E_CORE_WARNING:
case E_USER_WARNING:
common_log(LOG_WARNING, "[$errno] $errstr ($errfile:$errline)");
break;
case E_NOTICE:
case E_USER_NOTICE:
common_log(LOG_NOTICE, "[$errno] $errstr ($errfile:$errline)");
break;
case E_STRICT:
case E_DEPRECATED:
case E_USER_DEPRECATED:
// XXX: config variable to log this stuff, too
break;
default:
common_log(LOG_ERR, "[$errno] $errstr ($errfile:$errline) [UNKNOWN LEVEL, die()'ing]");
die();
break;
}
// FIXME: show error page if we're on the Web
/* Don't execute PHP internal error handler */
return true;
}
function common_session_token()
{
common_ensure_session();
if (!array_key_exists('token', $_SESSION)) {
$_SESSION['token'] = common_random_hexstr(64);
}
return $_SESSION['token'];
}
function common_license_terms($uri)
{
if(preg_match('/creativecommons.org\/licenses\/([^\/]+)/', $uri, $matches)) {
return explode('-',$matches[1]);
}
return array($uri);
}
function common_compatible_license($from, $to)
{
$from_terms = common_license_terms($from);
// public domain and cc-by are compatible with everything
if(count($from_terms) == 1 && ($from_terms[0] == 'publicdomain' || $from_terms[0] == 'by')) {
return true;
}
$to_terms = common_license_terms($to);
// sa is compatible across versions. IANAL
if(in_array('sa',$from_terms) || in_array('sa',$to_terms)) {
return count(array_diff($from_terms, $to_terms)) == 0;
}
// XXX: better compatibility check needed here!
// Should at least normalise URIs
return ($from == $to);
}
/**
* returns a quoted table name, if required according to config
*/
function common_database_tablename($tablename)
{
if(common_config('db','quote_identifiers')) {
$tablename = '"'. $tablename .'"';
}
//table prefixes could be added here later
return $tablename;
}
/**
* Shorten a URL with the current user's configured shortening service,
* or ur1.ca if configured, or not at all if no shortening is set up.
*
* @param string $long_url original URL
* @param User $user to specify a particular user's options
* @param boolean $force Force shortening (used when notice is too long)
* @return string may return the original URL if shortening failed
*
* @fixme provide a way to specify a particular shortener
*/
function common_shorten_url($long_url, User $user=null, $force = false)
{
$long_url = trim($long_url);
$user = common_current_user();
$maxUrlLength = User_urlshortener_prefs::maxUrlLength($user);
// $force forces shortening even if it's not strictly needed
// I doubt URL shortening is ever 'strictly' needed. - ESP
if (($maxUrlLength == -1 || mb_strlen($long_url) < $maxUrlLength) && !$force) {
return $long_url;
}
$shortenerName = User_urlshortener_prefs::urlShorteningService($user);
if (Event::handle('StartShortenUrl',
array($long_url, $shortenerName, &$shortenedUrl))) {
if ($shortenerName == 'internal') {
try {
$f = File::processNew($long_url);
$shortenedUrl = common_local_url('redirecturl', array('id' => $f->id));
if ((mb_strlen($shortenedUrl) < mb_strlen($long_url)) || $force) {
return $shortenedUrl;
} else {
return $long_url;
}
} catch (ServerException $e) {
return $long_url;
}
} else {
return $long_url;
}
} else {
//URL was shortened, so return the result
return trim($shortenedUrl);
}
}
/**
* @return mixed array($proxy, $ip) for web requests; proxy may be null
* null if not a web request
*
* @fixme X-Forwarded-For can be chained by multiple proxies;
we should parse the list and provide a cleaner array
* @fixme X-Forwarded-For can be forged by clients; only use them if trusted
* @fixme X_Forwarded_For headers will override X-Forwarded-For read through $_SERVER;
* use function to get exact request headers from Apache if possible.
*/
function common_client_ip()
{
if (!isset($_SERVER) || !array_key_exists('REQUEST_METHOD', $_SERVER)) {
return null;
}
if (array_key_exists('HTTP_X_FORWARDED_FOR', $_SERVER)) {
if (array_key_exists('HTTP_CLIENT_IP', $_SERVER)) {
$proxy = $_SERVER['HTTP_CLIENT_IP'];
} else {
$proxy = $_SERVER['REMOTE_ADDR'];
}
$ip = $_SERVER['HTTP_X_FORWARDED_FOR'];
} else {
$proxy = null;
if (array_key_exists('HTTP_CLIENT_IP', $_SERVER)) {
$ip = $_SERVER['HTTP_CLIENT_IP'];
} else {
$ip = $_SERVER['REMOTE_ADDR'];
}
}
return array($proxy, $ip);
}
function common_url_to_nickname($url)
{
static $bad = array('query', 'user', 'password', 'port', 'fragment');
$parts = parse_url($url);
// If any of these parts exist, this won't work
foreach ($bad as $badpart) {
if (array_key_exists($badpart, $parts)) {
return null;
}
}
// We just have host and/or path
// If it's just a host...
if (array_key_exists('host', $parts) &&
(!array_key_exists('path', $parts) || strcmp($parts['path'], '/') == 0))
{
$hostparts = explode('.', $parts['host']);
// Try to catch common idiom of nickname.service.tld
if ((count($hostparts) > 2) &&
(strlen($hostparts[count($hostparts) - 2]) > 3) && # try to skip .co.uk, .com.au
(strcmp($hostparts[0], 'www') != 0))
{
return common_nicknamize($hostparts[0]);
} else {
// Do the whole hostname
return common_nicknamize($parts['host']);
}
} else {
if (array_key_exists('path', $parts)) {
// Strip starting, ending slashes
$path = preg_replace('@/$@', '', $parts['path']);
$path = preg_replace('@^/@', '', $path);
$path = basename($path);
// Hack for MediaWiki user pages, in the form:
// http://example.com/wiki/User:Myname
// ('User' may be localized.)
if (strpos($path, ':')) {
$parts = array_filter(explode(':', $path));
$path = $parts[count($parts) - 1];
}
if ($path) {
return common_nicknamize($path);
}
}
}
return null;
}
function common_nicknamize($str)
{
try {
return Nickname::normalize($str);
} catch (NicknameException $e) {
return null;
}
}
function common_perf_counter($key, $val=null)
{
global $_perfCounters;
if (isset($_perfCounters)) {
if (common_config('site', 'logperf')) {
if (array_key_exists($key, $_perfCounters)) {
$_perfCounters[$key][] = $val;
} else {
$_perfCounters[$key] = array($val);
}
if (common_config('site', 'logperf_detail')) {
common_log(LOG_DEBUG, "PERF COUNTER HIT: $key $val");
}
}
}
}
function common_log_perf_counters()
{
if (common_config('site', 'logperf')) {
global $_startTime, $_perfCounters;
if (isset($_startTime)) {
$endTime = microtime(true);
$diff = round(($endTime - $_startTime) * 1000);
common_log(LOG_DEBUG, "PERF runtime: ${diff}ms");
}
$counters = $_perfCounters;
ksort($counters);
foreach ($counters as $key => $values) {
$count = count($values);
$unique = count(array_unique($values));
common_log(LOG_DEBUG, "PERF COUNTER: $key $count ($unique unique)");
}
}
}
function common_is_email($str)
{
return (strpos($str, '@') !== false);
}
function common_init_stats()
{
global $_mem, $_ts;
$_mem = memory_get_usage(true);
$_ts = microtime(true);
}
function common_log_delta($comment=null)
{
global $_mem, $_ts;
$mold = $_mem;
$told = $_ts;
$_mem = memory_get_usage(true);
$_ts = microtime(true);
$mtotal = $_mem - $mold;
$ttotal = $_ts - $told;
if (empty($comment)) {
$comment = 'Delta';
}
common_debug(sprintf("%s: %d %d", $comment, $mtotal, round($ttotal * 1000000)));
}
function common_strip_html($html, $trim=true, $save_whitespace=false)
{
// first replace <br /> with \n
$html = preg_replace('/\<(\s*)?br(\s*)?\/?(\s*)?\>/i', "\n", $html);
// then, unless explicitly avoided, remove excessive whitespace
if (!$save_whitespace) {
$html = preg_replace('/\s+/', ' ', $html);
}
$text = html_entity_decode(strip_tags($html), ENT_QUOTES, 'UTF-8');
return $trim ? trim($text) : $text;
}
function html_sprintf()
{
$args = func_get_args();
for ($i=1; $i<count($args); $i++) {
$args[$i] = htmlspecialchars($args[$i]);
}
return call_user_func_array('sprintf', $args);
}
function _ve($var)
{
return var_export($var, true);
}