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<?php
/**
* Information and debugging functions
*
* @license GPL 2 (http://www.gnu.org/licenses/gpl.html)
* @author Andreas Gohr <andi@splitbrain.org>
*/
use dokuwiki\HTTP\DokuHTTPClient;
use dokuwiki\Logger;
if(!defined('DOKU_MESSAGEURL')){
if(in_array('ssl', stream_get_transports())) {
define('DOKU_MESSAGEURL','https://update.dokuwiki.org/check/');
}else{
define('DOKU_MESSAGEURL','http://update.dokuwiki.org/check/');
}
}
/**
* Check for new messages from upstream
*
* @author Andreas Gohr <andi@splitbrain.org>
*/
function checkUpdateMessages(){
global $conf;
global $INFO;
global $updateVersion;
if(!$conf['updatecheck']) return;
if($conf['useacl'] && !$INFO['ismanager']) return;
$cf = getCacheName($updateVersion, '.updmsg');
$lm = @filemtime($cf);
$is_http = substr(DOKU_MESSAGEURL, 0, 5) != 'https';
// check if new messages needs to be fetched
if($lm < time()-(60*60*24) || $lm < @filemtime(DOKU_INC.DOKU_SCRIPT)){
@touch($cf);
Logger::debug("checkUpdateMessages(): downloading messages to ".$cf.($is_http?' (without SSL)':' (with SSL)'));
$http = new DokuHTTPClient();
$http->timeout = 12;
$resp = $http->get(DOKU_MESSAGEURL.$updateVersion);
if(is_string($resp) && ($resp == "" || substr(trim($resp), -1) == '%')) {
// basic sanity check that this is either an empty string response (ie "no messages")
// or it looks like one of our messages, not WiFi login or other interposed response
io_saveFile($cf,$resp);
} else {
Logger::debug("checkUpdateMessages(): unexpected HTTP response received", $http->error);
}
}else{
Logger::debug("checkUpdateMessages(): messages up to date");
}
$data = io_readFile($cf);
// show messages through the usual message mechanism
$msgs = explode("\n%\n",$data);
foreach($msgs as $msg){
if($msg) msg($msg,2);
}
}
/**
* Return DokuWiki's version (split up in date and type)
*
* @author Andreas Gohr <andi@splitbrain.org>
*/
function getVersionData(){
$version = array();
//import version string
if(file_exists(DOKU_INC.'VERSION')){
//official release
$version['date'] = trim(io_readFile(DOKU_INC.'VERSION'));
$version['type'] = 'Release';
}elseif(is_dir(DOKU_INC.'.git')){
$version['type'] = 'Git';
$version['date'] = 'unknown';
if ($date = shell_exec("git log -1 --pretty=format:'%cd' --date=short")) {
$version['date'] = hsc($date);
} else if (file_exists(DOKU_INC . '.git/HEAD')) {
// we cannot use git on the shell -- let's do it manually!
$headCommit = trim(file_get_contents(DOKU_INC . '.git/HEAD'));
if (strpos($headCommit, 'ref: ') === 0) {
// it is something like `ref: refs/heads/master`
$pathToHead = substr($headCommit, 5);
$headCommit = trim(file_get_contents(DOKU_INC . '.git/' . $pathToHead));
}
$subDir = substr($headCommit, 0, 2);
$fileName = substr($headCommit, 2);
$gitCommitObject = DOKU_INC . ".git/objects/$subDir/$fileName";
if (file_exists($gitCommitObject) && method_exists(zlib_decode)) {
$commit = zlib_decode(file_get_contents($gitCommitObject));
$committerLine = explode("\n", $commit)[3];
$committerData = explode(' ', $committerLine);
end($committerData);
$ts = prev($committerData);
if ($ts && $date = date('Y-m-d', $ts)) {
$version['date'] = $date;
}
}
}
}else{
global $updateVersion;
$version['date'] = 'update version '.$updateVersion;
$version['type'] = 'snapshot?';
}
return $version;
}
/**
* Return DokuWiki's version (as a string)
*
* @author Anika Henke <anika@selfthinker.org>
*/
function getVersion(){
$version = getVersionData();
return $version['type'].' '.$version['date'];
}
/**
* Run a few sanity checks
*
* @author Andreas Gohr <andi@splitbrain.org>
*/
function check(){
global $conf;
global $INFO;
/* @var Input $INPUT */
global $INPUT;
if ($INFO['isadmin'] || $INFO['ismanager']){
msg('DokuWiki version: '.getVersion(),1);
if(version_compare(phpversion(),'7.2.0','<')){
msg('Your PHP version is too old ('.phpversion().' vs. 7.2+ needed)',-1);
}else{
msg('PHP version '.phpversion(),1);
}
} else {
if(version_compare(phpversion(),'7.2.0','<')){
msg('Your PHP version is too old',-1);
}
}
$mem = (int) php_to_byte(ini_get('memory_limit'));
if($mem){
if ($mem === -1) {
msg('PHP memory is unlimited', 1);
} else if ($mem < 16777216) {
msg('PHP is limited to less than 16MB RAM (' . filesize_h($mem) . ').
Increase memory_limit in php.ini', -1);
} else if ($mem < 20971520) {
msg('PHP is limited to less than 20MB RAM (' . filesize_h($mem) . '),
you might encounter problems with bigger pages. Increase memory_limit in php.ini', -1);
} else if ($mem < 33554432) {
msg('PHP is limited to less than 32MB RAM (' . filesize_h($mem) . '),
but that should be enough in most cases. If not, increase memory_limit in php.ini', 0);
} else {
msg('More than 32MB RAM (' . filesize_h($mem) . ') available.', 1);
}
}
if(is_writable($conf['changelog'])){
msg('Changelog is writable',1);
}else{
if (file_exists($conf['changelog'])) {
msg('Changelog is not writable',-1);
}
}
if (isset($conf['changelog_old']) && file_exists($conf['changelog_old'])) {
msg('Old changelog exists', 0);
}
if (file_exists($conf['changelog'].'_failed')) {
msg('Importing old changelog failed', -1);
} else if (file_exists($conf['changelog'].'_importing')) {
msg('Importing old changelog now.', 0);
} else if (file_exists($conf['changelog'].'_import_ok')) {
msg('Old changelog imported', 1);
if (!plugin_isdisabled('importoldchangelog')) {
msg('Importoldchangelog plugin not disabled after import', -1);
}
}
if(is_writable(DOKU_CONF)){
msg('conf directory is writable',1);
}else{
msg('conf directory is not writable',-1);
}
if($conf['authtype'] == 'plain'){
global $config_cascade;
if(is_writable($config_cascade['plainauth.users']['default'])){
msg('conf/users.auth.php is writable',1);
}else{
msg('conf/users.auth.php is not writable',0);
}
}
if(function_exists('mb_strpos')){
if(defined('UTF8_NOMBSTRING')){
msg('mb_string extension is available but will not be used',0);
}else{
msg('mb_string extension is available and will be used',1);
if(ini_get('mbstring.func_overload') != 0){
msg('mb_string function overloading is enabled, this will cause problems and should be disabled',-1);
}
}
}else{
msg('mb_string extension not available - PHP only replacements will be used',0);
}
if (!UTF8_PREGSUPPORT) {
msg('PHP is missing UTF-8 support in Perl-Compatible Regular Expressions (PCRE)', -1);
}
if (!UTF8_PROPERTYSUPPORT) {
msg('PHP is missing Unicode properties support in Perl-Compatible Regular Expressions (PCRE)', -1);
}
$loc = setlocale(LC_ALL, 0);
if(!$loc){
msg('No valid locale is set for your PHP setup. You should fix this',-1);
}elseif(stripos($loc,'utf') === false){
msg('Your locale <code>'.hsc($loc).'</code> seems not to be a UTF-8 locale,
you should fix this if you encounter problems.',0);
}else{
msg('Valid locale '.hsc($loc).' found.', 1);
}
if($conf['allowdebug']){
msg('Debugging support is enabled. If you don\'t need it you should set $conf[\'allowdebug\'] = 0',-1);
}else{
msg('Debugging support is disabled',1);
}
if($INFO['userinfo']['name']){
msg('You are currently logged in as '.$INPUT->server->str('REMOTE_USER').' ('.$INFO['userinfo']['name'].')',0);
msg('You are part of the groups '.implode(', ', $INFO['userinfo']['grps']),0);
}else{
msg('You are currently not logged in',0);
}
msg('Your current permission for this page is '.$INFO['perm'],0);
if (file_exists($INFO['filepath']) && is_writable($INFO['filepath'])) {
msg('The current page is writable by the webserver', 1);
} elseif (!file_exists($INFO['filepath']) && is_writable(dirname($INFO['filepath']))) {
msg('The current page can be created by the webserver', 1);
} else {
msg('The current page is not writable by the webserver', -1);
}
if ($INFO['writable']) {
msg('The current page is writable by you', 1);
} else {
msg('The current page is not writable by you', -1);
}
// Check for corrupted search index
$lengths = idx_listIndexLengths();
$index_corrupted = false;
foreach ($lengths as $length) {
if (count(idx_getIndex('w', $length)) != count(idx_getIndex('i', $length))) {
$index_corrupted = true;
break;
}
}
foreach (idx_getIndex('metadata', '') as $index) {
if (count(idx_getIndex($index.'_w', '')) != count(idx_getIndex($index.'_i', ''))) {
$index_corrupted = true;
break;
}
}
if($index_corrupted) {
msg(
'The search index is corrupted. It might produce wrong results and most
probably needs to be rebuilt. See
<a href="http://www.dokuwiki.org/faq:searchindex">faq:searchindex</a>
for ways to rebuild the search index.', -1
);
} elseif(!empty($lengths)) {
msg('The search index seems to be working', 1);
} else {
msg(
'The search index is empty. See
<a href="http://www.dokuwiki.org/faq:searchindex">faq:searchindex</a>
for help on how to fix the search index. If the default indexer
isn\'t used or the wiki is actually empty this is normal.'
);
}
// rough time check
$http = new DokuHTTPClient();
$http->max_redirect = 0;
$http->timeout = 3;
$http->sendRequest('http://www.dokuwiki.org', '', 'HEAD');
$now = time();
if(isset($http->resp_headers['date'])) {
$time = strtotime($http->resp_headers['date']);
$diff = $time - $now;
if(abs($diff) < 4) {
msg("Server time seems to be okay. Diff: {$diff}s", 1);
} else {
msg("Your server's clock seems to be out of sync!
Consider configuring a sync with a NTP server. Diff: {$diff}s");
}
}
}
/**
* Display a message to the user
*
* If HTTP headers were not sent yet the message is added
* to the global message array else it's printed directly
* using html_msgarea()
*
* Triggers INFOUTIL_MSG_SHOW
*
* @see html_msgarea()
* @param string $message
* @param int $lvl -1 = error, 0 = info, 1 = success, 2 = notify
* @param string $line line number
* @param string $file file number
* @param int $allow who's allowed to see the message, see MSG_* constants
*/
function msg($message,$lvl=0,$line='',$file='',$allow=MSG_PUBLIC){
global $MSG, $MSG_shown;
static $errors = [
-1 => 'error',
0 => 'info',
1 => 'success',
2 => 'notify',
];
$msgdata = [
'msg' => $message,
'lvl' => $errors[$lvl],
'allow' => $allow,
'line' => $line,
'file' => $file,
];
$evt = new \dokuwiki\Extension\Event('INFOUTIL_MSG_SHOW', $msgdata);
if ($evt->advise_before()) {
/* Show msg normally - event could suppress message show */
if($msgdata['line'] || $msgdata['file']) {
$basename = \dokuwiki\Utf8\PhpString::basename($msgdata['file']);
$msgdata['msg'] .=' ['.$basename.':'.$msgdata['line'].']';
}
if(!isset($MSG)) $MSG = array();
$MSG[] = $msgdata;
if(isset($MSG_shown) || headers_sent()){
if(function_exists('html_msgarea')){
html_msgarea();
}else{
print "ERROR(".$msgdata['lvl'].") ".$msgdata['msg']."\n";
}
unset($GLOBALS['MSG']);
}
}
$evt->advise_after();
unset($evt);
}
/**
* Determine whether the current user is allowed to view the message
* in the $msg data structure
*
* @param $msg array dokuwiki msg structure
* msg => string, the message
* lvl => int, level of the message (see msg() function)
* allow => int, flag used to determine who is allowed to see the message
* see MSG_* constants
* @return bool
*/
function info_msg_allowed($msg){
global $INFO, $auth;
// is the message public? - everyone and anyone can see it
if (empty($msg['allow']) || ($msg['allow'] == MSG_PUBLIC)) return true;
// restricted msg, but no authentication
if (empty($auth)) return false;
switch ($msg['allow']){
case MSG_USERS_ONLY:
return !empty($INFO['userinfo']);
case MSG_MANAGERS_ONLY:
return $INFO['ismanager'];
case MSG_ADMINS_ONLY:
return $INFO['isadmin'];
default:
trigger_error('invalid msg allow restriction. msg="'.$msg['msg'].'" allow='.$msg['allow'].'"',
E_USER_WARNING);
return $INFO['isadmin'];
}
return false;
}
/**
* print debug messages
*
* little function to print the content of a var
*
* @author Andreas Gohr <andi@splitbrain.org>
*
* @param string $msg
* @param bool $hidden
*/
function dbg($msg,$hidden=false){
if($hidden){
echo "<!--\n";
print_r($msg);
echo "\n-->";
}else{
echo '<pre class="dbg">';
echo hsc(print_r($msg,true));
echo '</pre>';
}
}
/**
* Print info to debug log file
*
* @author Andreas Gohr <andi@splitbrain.org>
* @deprecated 2020-08-13
* @param string $msg
* @param string $header
*/
function dbglog($msg,$header=''){
dbg_deprecated('\\dokuwiki\\Logger');
// was the msg as single line string? use it as header
if($header === '' && is_string($msg) && strpos($msg, "\n") === false) {
$header = $msg;
$msg = '';
}
Logger::getInstance(Logger::LOG_DEBUG)->log(
$header, $msg
);
}
/**
* Log accesses to deprecated fucntions to the debug log
*
* @param string $alternative The function or method that should be used instead
* @triggers INFO_DEPRECATION_LOG
*/
function dbg_deprecated($alternative = '') {
\dokuwiki\Debug\DebugHelper::dbgDeprecatedFunction($alternative, 2);
}
/**
* Print a reversed, prettyprinted backtrace
*
* @author Gary Owen <gary_owen@bigfoot.com>
*/
function dbg_backtrace(){
// Get backtrace
$backtrace = debug_backtrace();
// Unset call to debug_print_backtrace
array_shift($backtrace);
// Iterate backtrace
$calls = array();
$depth = count($backtrace) - 1;
foreach ($backtrace as $i => $call) {
$location = $call['file'] . ':' . $call['line'];
$function = (isset($call['class'])) ?
$call['class'] . $call['type'] . $call['function'] : $call['function'];
$params = array();
if (isset($call['args'])){
foreach($call['args'] as $arg){
if(is_object($arg)){
$params[] = '[Object '.get_class($arg).']';
}elseif(is_array($arg)){
$params[] = '[Array]';
}elseif(is_null($arg)){
$params[] = '[NULL]';
}else{
$params[] = (string) '"'.$arg.'"';
}
}
}
$params = implode(', ',$params);
$calls[$depth - $i] = sprintf('%s(%s) called at %s',
$function,
str_replace("\n", '\n', $params),
$location);
}
ksort($calls);
return implode("\n", $calls);
}
/**
* Remove all data from an array where the key seems to point to sensitive data
*
* This is used to remove passwords, mail addresses and similar data from the
* debug output
*
* @author Andreas Gohr <andi@splitbrain.org>
*
* @param array $data
*/
function debug_guard(&$data){
foreach($data as $key => $value){
if(preg_match('/(notify|pass|auth|secret|ftp|userinfo|token|buid|mail|proxy)/i',$key)){
$data[$key] = '***';
continue;
}
if(is_array($value)) debug_guard($data[$key]);
}
}