gnu-social/lib/util.php

1759 lines
52 KiB
PHP

<?php
/*
* StatusNet - the distributed open-source microblogging tool
* Copyright (C) 2008, 2009, 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);
$err->showPage();
}
function common_init_locale($language=null)
{
if(!$language) {
$language = common_language();
}
putenv('LANGUAGE='.$language);
putenv('LANG='.$language);
return setlocale(LC_ALL, $language . ".utf8",
$language . ".UTF8",
$language . ".utf-8",
$language . ".UTF-8",
$language);
}
function common_init_language()
{
mb_internal_encoding('UTF-8');
// 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.
common_init_locale("en_US");
// 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);
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_language()
{
// 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();
$user_language = $user->language;
if ($user->language) {
// 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'] == $user_language) {
return $user_language;
}
}
}
}
// Otherwise, find the best match for the languages requested by the
// user's browser...
$httplang = isset($_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, $id)
{
if (is_object($id) || is_object($password)) {
$e = new Exception();
common_log(LOG_ERR, __METHOD__ . ' object in param to common_munge_password ' .
str_replace("\n", " ", $e->getTraceAsString()));
}
return md5($password . $id);
}
// check if a username exists and has matching password
function common_check_user($nickname, $password)
{
$authenticatedUser = false;
if (Event::handle('StartCheckPassword', array($nickname, $password, &$authenticatedUser))) {
$user = User::staticGet('nickname', common_canonical_nickname($nickname));
if (!empty($user)) {
if (!empty($password)) { // never allow login with blank password
if (0 == strcmp(common_munge_password($password, $user->id),
$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_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::staticGet('nickname', $nickname);
} else if (!($user instanceof User)) {
return false;
}
if ($user) {
if (Event::handle('StartSetUser', array(&$user))) {
if($user){
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,
$server);
}
define('REMEMBERME', 'rememberme');
define('REMEMBERME_EXPIRY', 30 * 24 * 60 * 60); // 30 days
function common_rememberme($user=null)
{
if (!$user) {
$user = common_current_user();
if (!$user) {
return false;
}
}
$rm = new Remember_me();
$rm->code = common_good_rand(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__);
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;
}
$rm = Remember_me::staticGet($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;
}
$user = User::staticGet($rm->user_id);
if (!$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) {
$user = User::staticGet($id);
if ($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() && $_SESSION['real_login'];
}
// get canonical version of nickname for comparison
function common_canonical_nickname($nickname)
{
// XXX: UTF-8 canonicalization (like combining chars)
return strtolower($nickname);
}
// get canonical version of email for comparison
function common_canonical_email($email)
{
// XXX: canonicalize UTF-8
// XXX: lcase the domain part
return $email;
}
function common_render_content($text, $notice)
{
$r = common_render_text($text);
$id = $notice->profile_id;
$r = common_linkify_mentions($r, $notice);
$r = preg_replace('/(^|[\s\.\,\:\;]+)!([A-Za-z0-9]{1,64})/e', "'\\1!'.common_group_link($id, '\\2')", $r);
return $r;
}
function common_linkify_mentions($text, $notice)
{
$mentions = common_find_mentions($text, $notice);
// 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, $position, mb_strlen($mention['text']));
}
return $text;
}
function common_linkify_mention($mention)
{
$output = null;
if (Event::handle('StartLinkifyMention', array($mention, &$output))) {
$xs = new XMLStringer(false);
$attrs = array('href' => $mention['url'],
'class' => 'url');
if (!empty($mention['title'])) {
$attrs['title'] = $mention['title'];
}
$xs->elementStart('span', 'vcard');
$xs->elementStart('a', $attrs);
$xs->element('span', 'fn nickname', $mention['text']);
$xs->elementEnd('a');
$xs->elementEnd('span');
$output = $xs->getString();
Event::handle('EndLinkifyMention', array($mention, &$output));
}
return $output;
}
function common_find_mentions($text, $notice)
{
$mentions = array();
$sender = Profile::staticGet('id', $notice->profile_id);
if (empty($sender)) {
return $mentions;
}
if (Event::handle('StartFindMentions', array($sender, $text, &$mentions))) {
// Get the context of the original notice, if any
$originalAuthor = null;
$originalNotice = null;
$originalMentions = array();
// Is it a reply?
if (!empty($notice) && !empty($notice->reply_to)) {
$originalNotice = Notice::staticGet('id', $notice->reply_to);
if (!empty($originalNotice)) {
$originalAuthor = Profile::staticGet('id', $originalNotice->profile_id);
$ids = $originalNotice->getReplies();
foreach ($ids as $id) {
$repliedTo = Profile::staticGet('id', $id);
if (!empty($repliedTo)) {
$originalMentions[$repliedTo->nickname] = $repliedTo;
}
}
}
}
preg_match_all('/^T ([A-Z0-9]{1,64}) /',
$text,
$tmatches,
PREG_OFFSET_CAPTURE);
preg_match_all('/(?:^|\s+)@(['.NICKNAME_FMT.']{1,64})/',
$text,
$atmatches,
PREG_OFFSET_CAPTURE);
$matches = array_merge($tmatches[1], $atmatches[1]);
foreach ($matches as $match) {
$nickname = common_canonical_nickname($match[0]);
// Try to get a profile for this nickname.
// Start with conversation context, then go to
// sender context.
if (!empty($originalAuthor) && $originalAuthor->nickname == $nickname) {
$mentioned = $originalAuthor;
} else if (!empty($originalMentions) &&
array_key_exists($nickname, $originalMentions)) {
$mentioned = $originalMentions[$nickname];
} else {
$mentioned = common_relative_profile($sender, $nickname);
}
if (!empty($mentioned)) {
$user = User::staticGet('id', $mentioned->id);
if ($user) {
$url = common_local_url('userbyid', array('id' => $user->id));
} else {
$url = $mentioned->profileurl;
}
$mention = array('mentioned' => array($mentioned),
'text' => $match[0],
'position' => $match[1],
'url' => $url);
if (!empty($mentioned->fullname)) {
$mention['title'] = $mentioned->fullname;
}
$mentions[] = $mention;
}
}
// @#tag => mention of all subscriptions tagged 'tag'
preg_match_all('/(?:^|[\s\.\,\:\;]+)@#([\pL\pN_\-\.]{1,64})/',
$text,
$hmatches,
PREG_OFFSET_CAPTURE);
foreach ($hmatches[1] as $hmatch) {
$tag = common_canonical_tag($hmatch[0]);
$tagged = Profile_tag::getTagged($sender->id, $tag);
$url = common_local_url('subscriptions',
array('nickname' => $sender->nickname,
'tag' => $tag));
$mentions[] = array('mentioned' => $tagged,
'text' => $hmatch[0],
'position' => $hmatch[1],
'url' => $url);
}
Event::handle('EndFindMentions', array($sender, $text, &$mentions));
}
return $mentions;
}
function common_render_text($text)
{
$r = htmlspecialchars($text);
$r = preg_replace('/[\x{0}-\x{8}\x{b}-\x{c}\x{e}-\x{19}]/', '', $r);
$r = common_replace_urls_callback($r, 'common_linkify');
$r = preg_replace('/(^|\&quot\;|\'|\(|\[|\{|\s+)#([\pL\pN_\-\.]{1,64})/e', "'\\1#'.common_tag_link('\\2')", $r);
// XXX: machine tags
return $r;
}
function common_replace_urls_callback($text, $callback, $notice_id = null) {
// Start off with a regex
$regex = '#'.
'(?:^|[\s\<\>\(\)\[\]\{\}\\\'\\\";]+)(?![\@\!\#])'.
'('.
'(?:'.
'(?:'. //Known protocols
'(?:'.
'(?:(?:https?|ftps?|mms|rtsp|gopher|news|nntp|telnet|wais|file|prospero|webcal|irc)://)'.
'|'.
'(?:(?:mailto|aim|tel|xmpp):)'.
')'.
'(?:[\pN\pL\-\_\+\%\~]+(?::[\pN\pL\-\_\+\%\~]+)?\@)?'. //user:pass@
'(?:'.
'(?:'.
'\[[\pN\pL\-\_\:\.]+(?<![\.\:])\]'. //[dns]
')|(?:'.
'[\pN\pL\-\_\:\.]+(?<![\.\:])'. //dns
')'.
')'.
')'.
'|(?:(?: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
'|(?:'. //IPv6
'\[?(?:(?:(?:[0-9A-Fa-f]{1,4}:){7}(?:(?:[0-9A-Fa-f]{1,4})|:))|(?:(?:[0-9A-Fa-f]{1,4}:){6}(?::|(?:(?:25[0-5]|2[0-4]\d|[01]?\d{1,2})(?:\.(?:25[0-5]|2[0-4]\d|[01]?\d{1,2})){3})|(?::[0-9A-Fa-f]{1,4})))|(?:(?:[0-9A-Fa-f]{1,4}:){5}(?:(?::(?:(?:25[0-5]|2[0-4]\d|[01]?\d{1,2})(?:\.(?:25[0-5]|2[0-4]\d|[01]?\d{1,2})){3})?)|(?:(?::[0-9A-Fa-f]{1,4}){1,2})))|(?:(?:[0-9A-Fa-f]{1,4}:){4}(?::[0-9A-Fa-f]{1,4}){0,1}(?:(?::(?:(?:25[0-5]|2[0-4]\d|[01]?\d{1,2})(?:\.(?:25[0-5]|2[0-4]\d|[01]?\d{1,2})){3})?)|(?:(?::[0-9A-Fa-f]{1,4}){1,2})))|(?:(?:[0-9A-Fa-f]{1,4}:){3}(?::[0-9A-Fa-f]{1,4}){0,2}(?:(?::(?:(?:25[0-5]|2[0-4]\d|[01]?\d{1,2})(?:\.(?:25[0-5]|2[0-4]\d|[01]?\d{1,2})){3})?)|(?:(?::[0-9A-Fa-f]{1,4}){1,2})))|(?:(?:[0-9A-Fa-f]{1,4}:){2}(?::[0-9A-Fa-f]{1,4}){0,3}(?:(?::(?:(?:25[0-5]|2[0-4]\d|[01]?\d{1,2})(?:\.(?:25[0-5]|2[0-4]\d|[01]?\d{1,2})){3})?)|(?:(?::[0-9A-Fa-f]{1,4}){1,2})))|(?:(?:[0-9A-Fa-f]{1,4}:)(?::[0-9A-Fa-f]{1,4}){0,4}(?:(?::(?:(?:25[0-5]|2[0-4]\d|[01]?\d{1,2})(?:\.(?:25[0-5]|2[0-4]\d|[01]?\d{1,2})){3})?)|(?:(?::[0-9A-Fa-f]{1,4}){1,2})))|(?::(?::[0-9A-Fa-f]{1,4}){0,5}(?:(?::(?:(?:25[0-5]|2[0-4]\d|[01]?\d{1,2})(?:\.(?:25[0-5]|2[0-4]\d|[01]?\d{1,2})){3})?)|(?:(?::[0-9A-Fa-f]{1,4}){1,2})))|(?:(?:(?:25[0-5]|2[0-4]\d|[01]?\d{1,2})(?:\.(?:25[0-5]|2[0-4]\d|[01]?\d{1,2})){3})))\]?(?<!:)'.
')|(?:'. //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|ZW|local|loc|onion)'.
')(?![\pN\pL\-\_])'.
')'.
'(?:'.
'(?:\:\d+)?'. //:port
'(?:/[\pN\pL$\,\!\(\)\.\:\-\_\+\/\=\&\;\%\~\*\$\+\'@]*)?'. // /path
'(?:\?[\pN\pL\$\,\!\(\)\.\:\-\_\+\/\=\&\;\%\~\*\$\+\'@\/]*)?'. // ?query string
'(?:\#[\pN\pL$\,\!\(\)\.\:\-\_\+\/\=\&\;\%\~\*\$\+\'\@/\?\#]*)?'. // #fragment
')(?<![\?\.\,\#\,])'.
')'.
'#ixu';
//preg_match_all($regex,$text,$matches);
//print_r($matches);
return preg_replace_callback($regex, curry('callback_helper',$callback,$notice_id) ,$text);
}
function callback_helper($matches, $callback, $notice_id) {
$url=$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);
if(empty($notice_id)){
$result = call_user_func_array($callback, array($url));
}else{
$result = call_user_func_array($callback, array(array($url,$notice_id)) );
}
return substr($matches[0],0,$left) . $result . substr($matches[0],$right);
}
if (version_compare(PHP_VERSION, '5.3.0', 'ge')) {
// lambda implementation in a separate file; PHP 5.2 won't parse it.
require_once INSTALLDIR . "/lib/curry.php";
} else {
function curry($fn) {
$args = func_get_args();
array_shift($args);
$id = uniqid('_partial');
$GLOBALS[$id] = array($fn, $args);
return create_function('',
'$args = func_get_args(); '.
'return call_user_func_array('.
'$GLOBALS["'.$id.'"][0],'.
'array_merge('.
'$args,'.
'$GLOBALS["'.$id.'"][1]));');
}
}
function common_linkify($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) {
//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);
if (is_array($longurl_data)) {
$longurl = $longurl_data['url'];
} elseif (is_string($longurl_data)) {
$longurl = $longurl_data;
} else {
throw new ServerException("Can't linkify url '$url'");
}
}
$attrs = array('href' => $canon, 'title' => $longurl, 'rel' => 'external');
$is_attachment = false;
$attachment_id = null;
$has_thumb = false;
// Check to see whether this is a known "attachment" URL.
$f = File::staticGet('url', $longurl);
if (empty($f)) {
// XXX: this writes to the database. :<
$f = File::processNew($longurl);
}
if (!empty($f)) {
if ($f->isEnclosure()) {
$is_attachment = true;
$attachment_id = $f->id;
} else {
$foe = File_oembed::staticGet('file_id', $f->id);
if (!empty($foe)) {
// if it has OEmbed info, it's an attachment, too
$is_attachment = true;
$attachment_id = $f->id;
$thumb = File_thumbnail::staticGet('file_id', $f->id);
if (!empty($thumb)) {
$has_thumb = true;
}
}
}
}
// Add clippy
if ($is_attachment) {
$attrs['class'] = 'attachment';
if ($has_thumb) {
$attrs['class'] = 'attachment thumbnail';
}
$attrs['id'] = "attachment-{$attachment_id}";
}
return XMLStringer::estring('a', $attrs, $url);
}
function common_shorten_links($text)
{
$maxLength = Notice::maxContent();
if ($maxLength == 0 || mb_strlen($text) <= $maxLength) return $text;
return common_replace_urls_callback($text, array('File_redirection', 'makeShort'));
}
function common_xml_safe_str($str)
{
// Neutralize control codes and surrogates
return preg_replace('/[\p{Cc}\p{Cs}]/u', '*', $str);
}
function common_tag_link($tag)
{
$canonical = common_canonical_tag($tag);
$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)
{
$tag = mb_convert_case($tag, MB_CASE_LOWER, "UTF-8");
return str_replace(array('-', '_', '.'), '', $tag);
}
function common_valid_profile_tag($str)
{
return preg_match('/^[A-Za-z0-9_\-\.]{1,64}$/', $str);
}
function common_group_link($sender_id, $nickname)
{
$sender = Profile::staticGet($sender_id);
$group = User_group::getForNickname($nickname);
if ($sender && $group && $sender->isMember($group)) {
$attrs = array('href' => $group->permalink(),
'class' => 'url');
if (!empty($group->fullname)) {
$attrs['title'] = $group->fullname . ' (' . $group->nickname . ')';
}
$xs = new XMLStringer();
$xs->elementStart('span', 'vcard');
$xs->elementStart('a', $attrs);
$xs->element('span', 'fn nickname', $nickname);
$xs->elementEnd('a');
$xs->elementEnd('span');
return $xs->getString();
} else {
return $nickname;
}
}
function common_relative_profile($sender, $nickname, $dt=null)
{
// Try to find profiles this profile is subscribed to that have this nickname
$recipient = new Profile();
// XXX: use a join instead of a subquery
$recipient->whereAdd('EXISTS (SELECT subscribed from subscription where subscriber = '.$sender->id.' and subscribed = id)', 'AND');
$recipient->whereAdd("nickname = '" . trim($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
$recipient->whereAdd('EXISTS (SELECT subscriber from subscription where subscribed = '.$sender->id.' and subscriber = id)', 'AND');
$recipient->whereAdd("nickname = '" . trim($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.
$sender = User::staticGet($sender->id);
if ($sender) {
$recipient_user = User::staticGet('nickname', $nickname);
if ($recipient_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)
{
$r = Router::get();
$path = $r->build($action, $args, $params, $fragment);
$ssl = common_is_sensitive($action);
if (common_config('site','fancy')) {
$url = common_path(mb_substr($path, 1), $ssl, $addSession);
} else {
if (mb_strpos($path, '/index.php') === 0) {
$url = common_path(mb_substr($path, 1), $ssl, $addSession);
} else {
$url = common_path('index.php'.$path, $ssl, $addSession);
}
}
return $url;
}
function common_is_sensitive($action)
{
static $sensitive = array('login', 'register', 'passwordsettings',
'twittersettings', 'api');
$ssl = null;
if (Event::handle('SensitiveAction', array($action, &$ssl))) {
$ssl = in_array($action, $sensitive);
}
return $ssl;
}
function common_path($relative, $ssl=false, $addSession=true)
{
$pathpart = (common_config('site', 'path')) ? common_config('site', 'path')."/" : '';
if (($ssl && (common_config('site', 'ssl') === 'sometimes'))
|| common_config('site', 'ssl') === 'always') {
$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;
}
function common_inject_session($url, $serverpart = null)
{
if (common_have_session()) {
if (empty($serverpart)) {
$serverpart = parse_url($url, PHP_URL_HOST);
}
$currentServer = $_SERVER['HTTP_HOST'];
// Are we pointing to another server (like an SSL server?)
if (!empty($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 ($diff < 60) {
return _('a few seconds ago');
} else if ($diff < 92) {
return _('about a minute ago');
} else if ($diff < 3300) {
return sprintf(_('about %d minutes ago'), round($diff/60));
} else if ($diff < 5400) {
return _('about an hour ago');
} else if ($diff < 22 * 3600) {
return sprintf(_('about %d hours ago'), round($diff/3600));
} else if ($diff < 37 * 3600) {
return _('about a day ago');
} else if ($diff < 24 * 24 * 3600) {
return sprintf(_('about %d days ago'), round($diff/(24*3600)));
} else if ($diff < 46 * 24 * 3600) {
return _('about a month ago');
} else if ($diff < 330 * 24 * 3600) {
return sprintf(_('about %d months ago'), round($diff/(30*24*3600)));
} else if ($diff < 480 * 24 * 3600) {
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);
return $d->format(DATE_RFC850);
}
function common_date_w3dtf($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");
$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);
$xo->endXML();
exit;
}
function common_broadcast_notice($notice, $remote=false)
{
// DO NOTHING!
}
// Stick the notice on the queue
function common_enqueue_notice($notice)
{
static $localTransports = array('omb',
'ping');
$transports = array();
if (common_config('sms', 'enabled')) {
$transports[] = 'sms';
}
if (Event::hasHandler('HandleQueuedNotice')) {
$transports[] = 'plugin';
}
$xmpp = common_config('xmpp', 'enabled');
if ($xmpp) {
$transports[] = 'jabber';
}
// @fixme move these checks into QueueManager and/or individual handlers
if ($notice->is_local == Notice::LOCAL_PUBLIC ||
$notice->is_local == Notice::LOCAL_NONPUBLIC) {
$transports = array_merge($transports, $localTransports);
if ($xmpp) {
$transports[] = 'public';
}
}
if (Event::handle('StartEnqueueNotice', array($notice, &$transports))) {
$qm = QueueManager::get();
foreach ($transports as $transport)
{
$qm->enqueue($notice, $transport);
}
Event::handle('EndEnqueueNotice', array($notice, $transports));
}
return true;
}
/**
* Broadcast profile updates to OMB and other remote subscribers.
*
* Since this may be slow with a lot of subscribers or bad remote sites,
* this is run through the background queues if possible.
*/
function common_broadcast_profile(Profile $profile)
{
$qm = QueueManager::get();
$qm->enqueue($profile, "profile");
return true;
}
function common_profile_url($nickname)
{
return common_local_url('showstream', array('nickname' => $nickname),
null, null, false);
}
// Should make up a reasonable root URL
function common_root_url($ssl=false)
{
$url = common_path('', $ssl, false);
$i = strpos($url, '?');
if ($i !== false) {
$url = substr($url, 0, $i);
}
return $url;
}
// returns $bytes bytes of random data as a hexadecimal string
// "good" here is a goal and not a guarantee
function common_good_rand($bytes)
{
// XXX: use random.org...?
if (@file_exists('/dev/urandom')) {
return common_urandom($bytes);
} else { // FIXME: this is probably not good enough
return common_mtrand($bytes);
}
}
function common_urandom($bytes)
{
$h = fopen('/dev/urandom', 'rb');
// should not block
$src = fread($h, $bytes);
fclose($h);
$enc = '';
for ($i = 0; $i < $bytes; $i++) {
$enc .= sprintf("%02x", (ord($src[$i])));
}
return $enc;
}
function common_mtrand($bytes)
{
$enc = '';
for ($i = 0; $i < $bytes; $i++) {
$enc .= sprintf("%02x", mt_rand(0, 255));
}
return $enc;
}
function common_set_returnto($url)
{
common_ensure_session();
$_SESSION['returnto'] = $url;
}
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 . "\n";
}
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 = '[' . 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)
{
$objstr = common_log_objstring($object);
$last_error = &PEAR::getStaticProperty('DB_DataObject','lastError');
common_log(LOG_ERR, $last_error->message . '(' . $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)
{
return Validate::uri($url, array('allowed_schemes' => array('http', 'https')));
}
function common_valid_tag($tag)
{
if (preg_match('/^tag:(.*?),(\d{4}(-\d{2}(-\d{2})?)?):(.*)$/', $tag, $matches)) {
return (Validate::email($matches[1]) ||
preg_match('/^([\w-\.]+)$/', $matches[1]));
}
return false;
}
/* Following functions are copied from MediaWiki GlobalFunctions.php
* and written by Evan Prodromou. */
function common_accept_to_prefs($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 $prefs;
}
function common_mime_type_match($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)
{
global $config;
return (array_key_exists($main, $config) &&
array_key_exists($sub, $config[$main])) ? $config[$main][$sub] : false;
}
function common_copy_args($from)
{
$to = array();
$strip = get_magic_quotes_gpc();
foreach ($from as $k => $v) {
$to[$k] = ($strip) ? stripslashes($v) : $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' => $user->id),
null, null, false);
}
function common_notice_uri(&$notice)
{
return common_local_url('shownotice',
array('notice' => $notice->id));
}
// 36 alphanums - lookalikes (0, O, 1, I) = 32 chars = 5 bits
function common_confirmation_code($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_good_rand(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)
{
$c = preg_replace('/%%action.(\w+)%%/e', "common_local_url('\\1')", $c);
$c = preg_replace('/%%doc.(\w+)%%/e', "common_local_url('doc', array('title'=>'\\1'))", $c);
$c = preg_replace('/%%(\w+).(\w+)%%/e', 'common_config(\'\\1\', \'\\2\')', $c);
return Markdown($c);
}
function common_profile_uri($profile)
{
if (!$profile) {
return null;
}
$user = User::staticGet($profile->id);
if ($user) {
return $user->uri;
}
$remote = Remote_profile::staticGet($profile->id);
if ($remote) {
return $remote->uri;
}
// XXX: this is a very bad profile!
return null;
}
function common_canonical_sms($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_good_rand(64);
}
return $_SESSION['token'];
}
function common_cache_key($extra)
{
return Cache::key($extra);
}
function common_keyize($str)
{
return Cache::keyize($str);
}
function common_memcache()
{
return Cache::instance();
}
function common_license_terms($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.
* Length is not considered.
*
* @param string $long_url
* @return string may return the original URL if shortening failed
*
* @fixme provide a way to specify a particular shortener
* @fixme provide a way to specify to use a given user's shortening preferences
*/
function common_shorten_url($long_url)
{
$long_url = trim($long_url);
$user = common_current_user();
if (empty($user)) {
// common current user does not find a user when called from the XMPP daemon
// therefore we'll set one here fix, so that XMPP given URLs may be shortened
$shortenerName = 'ur1.ca';
} else {
$shortenerName = $user->urlshorteningservice;
}
if(Event::handle('StartShortenUrl', array($long_url,$shortenerName,&$shortenedUrl))){
//URL wasn't shortened, so return the long url
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);
if ($path) {
return common_nicknamize($path);
}
}
}
return null;
}
function common_nicknamize($str)
{
$str = preg_replace('/\W/', '', $str);
return strtolower($str);
}