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- <?php
- /**
- * File IO functions
- *
- * @license GPL 2 (http://www.gnu.org/licenses/gpl.html)
- * @author Andreas Gohr <andi@splitbrain.org>
- */
- use dokuwiki\HTTP\DokuHTTPClient;
- use dokuwiki\Extension\Event;
- /**
- * Removes empty directories
- *
- * Sends IO_NAMESPACE_DELETED events for 'pages' and 'media' namespaces.
- * Event data:
- * $data[0] ns: The colon separated namespace path minus the trailing page name.
- * $data[1] ns_type: 'pages' or 'media' namespace tree.
- *
- * @param string $id - a pageid, the namespace of that id will be tried to deleted
- * @param string $basedir - the config name of the type to delete (datadir or mediadir usally)
- * @return bool - true if at least one namespace was deleted
- *
- * @author Andreas Gohr <andi@splitbrain.org>
- * @author Ben Coburn <btcoburn@silicodon.net>
- */
- function io_sweepNS($id,$basedir='datadir'){
- global $conf;
- $types = array ('datadir'=>'pages', 'mediadir'=>'media');
- $ns_type = (isset($types[$basedir])?$types[$basedir]:false);
- $delone = false;
- //scan all namespaces
- while(($id = getNS($id)) !== false){
- $dir = $conf[$basedir].'/'.utf8_encodeFN(str_replace(':','/',$id));
- //try to delete dir else return
- if(@rmdir($dir)) {
- if ($ns_type!==false) {
- $data = array($id, $ns_type);
- $delone = true; // we deleted at least one dir
- Event::createAndTrigger('IO_NAMESPACE_DELETED', $data);
- }
- } else { return $delone; }
- }
- return $delone;
- }
- /**
- * Used to read in a DokuWiki page from file, and send IO_WIKIPAGE_READ events.
- *
- * Generates the action event which delegates to io_readFile().
- * Action plugins are allowed to modify the page content in transit.
- * The file path should not be changed.
- *
- * Event data:
- * $data[0] The raw arguments for io_readFile as an array.
- * $data[1] ns: The colon separated namespace path minus the trailing page name. (false if root ns)
- * $data[2] page_name: The wiki page name.
- * $data[3] rev: The page revision, false for current wiki pages.
- *
- * @author Ben Coburn <btcoburn@silicodon.net>
- *
- * @param string $file filename
- * @param string $id page id
- * @param bool|int $rev revision timestamp
- * @return string
- */
- function io_readWikiPage($file, $id, $rev=false) {
- if (empty($rev)) { $rev = false; }
- $data = array(array($file, true), getNS($id), noNS($id), $rev);
- return Event::createAndTrigger('IO_WIKIPAGE_READ', $data, '_io_readWikiPage_action', false);
- }
- /**
- * Callback adapter for io_readFile().
- *
- * @author Ben Coburn <btcoburn@silicodon.net>
- *
- * @param array $data event data
- * @return string
- */
- function _io_readWikiPage_action($data) {
- if (is_array($data) && is_array($data[0]) && count($data[0])===2) {
- return call_user_func_array('io_readFile', $data[0]);
- } else {
- return ''; //callback error
- }
- }
- /**
- * Returns content of $file as cleaned string.
- *
- * Uses gzip if extension is .gz
- *
- * If you want to use the returned value in unserialize
- * be sure to set $clean to false!
- *
- * @author Andreas Gohr <andi@splitbrain.org>
- *
- * @param string $file filename
- * @param bool $clean
- * @return string|bool the file contents or false on error
- */
- function io_readFile($file,$clean=true){
- $ret = '';
- if(file_exists($file)){
- if(substr($file,-3) == '.gz'){
- if(!DOKU_HAS_GZIP) return false;
- $ret = gzfile($file);
- if(is_array($ret)) $ret = join('', $ret);
- }else if(substr($file,-4) == '.bz2'){
- if(!DOKU_HAS_BZIP) return false;
- $ret = bzfile($file);
- }else{
- $ret = file_get_contents($file);
- }
- }
- if($ret === null) return false;
- if($ret !== false && $clean){
- return cleanText($ret);
- }else{
- return $ret;
- }
- }
- /**
- * Returns the content of a .bz2 compressed file as string
- *
- * @author marcel senf <marcel@rucksackreinigung.de>
- * @author Andreas Gohr <andi@splitbrain.org>
- *
- * @param string $file filename
- * @param bool $array return array of lines
- * @return string|array|bool content or false on error
- */
- function bzfile($file, $array=false) {
- $bz = bzopen($file,"r");
- if($bz === false) return false;
- if($array) $lines = array();
- $str = '';
- while (!feof($bz)) {
- //8192 seems to be the maximum buffersize?
- $buffer = bzread($bz,8192);
- if(($buffer === false) || (bzerrno($bz) !== 0)) {
- return false;
- }
- $str = $str . $buffer;
- if($array) {
- $pos = strpos($str, "\n");
- while($pos !== false) {
- $lines[] = substr($str, 0, $pos+1);
- $str = substr($str, $pos+1);
- $pos = strpos($str, "\n");
- }
- }
- }
- bzclose($bz);
- if($array) {
- if($str !== '') $lines[] = $str;
- return $lines;
- }
- return $str;
- }
- /**
- * Used to write out a DokuWiki page to file, and send IO_WIKIPAGE_WRITE events.
- *
- * This generates an action event and delegates to io_saveFile().
- * Action plugins are allowed to modify the page content in transit.
- * The file path should not be changed.
- * (The append parameter is set to false.)
- *
- * Event data:
- * $data[0] The raw arguments for io_saveFile as an array.
- * $data[1] ns: The colon separated namespace path minus the trailing page name. (false if root ns)
- * $data[2] page_name: The wiki page name.
- * $data[3] rev: The page revision, false for current wiki pages.
- *
- * @author Ben Coburn <btcoburn@silicodon.net>
- *
- * @param string $file filename
- * @param string $content
- * @param string $id page id
- * @param int|bool $rev timestamp of revision
- * @return bool
- */
- function io_writeWikiPage($file, $content, $id, $rev=false) {
- if (empty($rev)) { $rev = false; }
- if ($rev===false) { io_createNamespace($id); } // create namespaces as needed
- $data = array(array($file, $content, false), getNS($id), noNS($id), $rev);
- return Event::createAndTrigger('IO_WIKIPAGE_WRITE', $data, '_io_writeWikiPage_action', false);
- }
- /**
- * Callback adapter for io_saveFile().
- * @author Ben Coburn <btcoburn@silicodon.net>
- *
- * @param array $data event data
- * @return bool
- */
- function _io_writeWikiPage_action($data) {
- if (is_array($data) && is_array($data[0]) && count($data[0])===3) {
- $ok = call_user_func_array('io_saveFile', $data[0]);
- // for attic files make sure the file has the mtime of the revision
- if($ok && is_int($data[3]) && $data[3] > 0) {
- @touch($data[0][0], $data[3]);
- }
- return $ok;
- } else {
- return false; //callback error
- }
- }
- /**
- * Internal function to save contents to a file.
- *
- * @author Andreas Gohr <andi@splitbrain.org>
- *
- * @param string $file filename path to file
- * @param string $content
- * @param bool $append
- * @return bool true on success, otherwise false
- */
- function _io_saveFile($file, $content, $append) {
- global $conf;
- $mode = ($append) ? 'ab' : 'wb';
- $fileexists = file_exists($file);
- if(substr($file,-3) == '.gz'){
- if(!DOKU_HAS_GZIP) return false;
- $fh = @gzopen($file,$mode.'9');
- if(!$fh) return false;
- gzwrite($fh, $content);
- gzclose($fh);
- }else if(substr($file,-4) == '.bz2'){
- if(!DOKU_HAS_BZIP) return false;
- if($append) {
- $bzcontent = bzfile($file);
- if($bzcontent === false) return false;
- $content = $bzcontent.$content;
- }
- $fh = @bzopen($file,'w');
- if(!$fh) return false;
- bzwrite($fh, $content);
- bzclose($fh);
- }else{
- $fh = @fopen($file,$mode);
- if(!$fh) return false;
- fwrite($fh, $content);
- fclose($fh);
- }
- if(!$fileexists and $conf['fperm']) chmod($file, $conf['fperm']);
- return true;
- }
- /**
- * Saves $content to $file.
- *
- * If the third parameter is set to true the given content
- * will be appended.
- *
- * Uses gzip if extension is .gz
- * and bz2 if extension is .bz2
- *
- * @author Andreas Gohr <andi@splitbrain.org>
- *
- * @param string $file filename path to file
- * @param string $content
- * @param bool $append
- * @return bool true on success, otherwise false
- */
- function io_saveFile($file, $content, $append=false) {
- io_makeFileDir($file);
- io_lock($file);
- if(!_io_saveFile($file, $content, $append)) {
- msg("Writing $file failed",-1);
- io_unlock($file);
- return false;
- }
- io_unlock($file);
- return true;
- }
- /**
- * Replace one or more occurrences of a line in a file.
- *
- * The default, when $maxlines is 0 is to delete all matching lines then append a single line.
- * A regex that matches any part of the line will remove the entire line in this mode.
- * Captures in $newline are not available.
- *
- * Otherwise each line is matched and replaced individually, up to the first $maxlines lines
- * or all lines if $maxlines is -1. If $regex is true then captures can be used in $newline.
- *
- * Be sure to include the trailing newline in $oldline when replacing entire lines.
- *
- * Uses gzip if extension is .gz
- * and bz2 if extension is .bz2
- *
- * @author Steven Danz <steven-danz@kc.rr.com>
- * @author Christopher Smith <chris@jalakai.co.uk>
- * @author Patrick Brown <ptbrown@whoopdedo.org>
- *
- * @param string $file filename
- * @param string $oldline exact linematch to remove
- * @param string $newline new line to insert
- * @param bool $regex use regexp?
- * @param int $maxlines number of occurrences of the line to replace
- * @return bool true on success
- */
- function io_replaceInFile($file, $oldline, $newline, $regex=false, $maxlines=0) {
- if ((string)$oldline === '') {
- trigger_error('$oldline parameter cannot be empty in io_replaceInFile()', E_USER_WARNING);
- return false;
- }
- if (!file_exists($file)) return true;
- io_lock($file);
- // load into array
- if(substr($file,-3) == '.gz'){
- if(!DOKU_HAS_GZIP) return false;
- $lines = gzfile($file);
- }else if(substr($file,-4) == '.bz2'){
- if(!DOKU_HAS_BZIP) return false;
- $lines = bzfile($file, true);
- }else{
- $lines = file($file);
- }
- // make non-regexes into regexes
- $pattern = $regex ? $oldline : '/^'.preg_quote($oldline,'/').'$/';
- $replace = $regex ? $newline : addcslashes($newline, '\$');
- // remove matching lines
- if ($maxlines > 0) {
- $count = 0;
- $matched = 0;
- foreach($lines as $i => $line) {
- if($count >= $maxlines) break;
- // $matched will be set to 0|1 depending on whether pattern is matched and line replaced
- $lines[$i] = preg_replace($pattern, $replace, $line, -1, $matched);
- if ($matched) $count++;
- }
- } else if ($maxlines == 0) {
- $lines = preg_grep($pattern, $lines, PREG_GREP_INVERT);
- if ((string)$newline !== ''){
- $lines[] = $newline;
- }
- } else {
- $lines = preg_replace($pattern, $replace, $lines);
- }
- if(count($lines)){
- if(!_io_saveFile($file, join('',$lines), false)) {
- msg("Removing content from $file failed",-1);
- io_unlock($file);
- return false;
- }
- }else{
- @unlink($file);
- }
- io_unlock($file);
- return true;
- }
- /**
- * Delete lines that match $badline from $file.
- *
- * Be sure to include the trailing newline in $badline
- *
- * @author Patrick Brown <ptbrown@whoopdedo.org>
- *
- * @param string $file filename
- * @param string $badline exact linematch to remove
- * @param bool $regex use regexp?
- * @return bool true on success
- */
- function io_deleteFromFile($file,$badline,$regex=false){
- return io_replaceInFile($file,$badline,null,$regex,0);
- }
- /**
- * Tries to lock a file
- *
- * Locking is only done for io_savefile and uses directories
- * inside $conf['lockdir']
- *
- * It waits maximal 3 seconds for the lock, after this time
- * the lock is assumed to be stale and the function goes on
- *
- * @author Andreas Gohr <andi@splitbrain.org>
- *
- * @param string $file filename
- */
- function io_lock($file){
- global $conf;
- $lockDir = $conf['lockdir'].'/'.md5($file);
- @ignore_user_abort(1);
- $timeStart = time();
- do {
- //waited longer than 3 seconds? -> stale lock
- if ((time() - $timeStart) > 3) break;
- $locked = @mkdir($lockDir);
- if($locked){
- if($conf['dperm']) chmod($lockDir, $conf['dperm']);
- break;
- }
- usleep(50);
- } while ($locked === false);
- }
- /**
- * Unlocks a file
- *
- * @author Andreas Gohr <andi@splitbrain.org>
- *
- * @param string $file filename
- */
- function io_unlock($file){
- global $conf;
- $lockDir = $conf['lockdir'].'/'.md5($file);
- @rmdir($lockDir);
- @ignore_user_abort(0);
- }
- /**
- * Create missing namespace directories and send the IO_NAMESPACE_CREATED events
- * in the order of directory creation. (Parent directories first.)
- *
- * Event data:
- * $data[0] ns: The colon separated namespace path minus the trailing page name.
- * $data[1] ns_type: 'pages' or 'media' namespace tree.
- *
- * @author Ben Coburn <btcoburn@silicodon.net>
- *
- * @param string $id page id
- * @param string $ns_type 'pages' or 'media'
- */
- function io_createNamespace($id, $ns_type='pages') {
- // verify ns_type
- $types = array('pages'=>'wikiFN', 'media'=>'mediaFN');
- if (!isset($types[$ns_type])) {
- trigger_error('Bad $ns_type parameter for io_createNamespace().');
- return;
- }
- // make event list
- $missing = array();
- $ns_stack = explode(':', $id);
- $ns = $id;
- $tmp = dirname( $file = call_user_func($types[$ns_type], $ns) );
- while (!@is_dir($tmp) && !(file_exists($tmp) && !is_dir($tmp))) {
- array_pop($ns_stack);
- $ns = implode(':', $ns_stack);
- if (strlen($ns)==0) { break; }
- $missing[] = $ns;
- $tmp = dirname(call_user_func($types[$ns_type], $ns));
- }
- // make directories
- io_makeFileDir($file);
- // send the events
- $missing = array_reverse($missing); // inside out
- foreach ($missing as $ns) {
- $data = array($ns, $ns_type);
- Event::createAndTrigger('IO_NAMESPACE_CREATED', $data);
- }
- }
- /**
- * Create the directory needed for the given file
- *
- * @author Andreas Gohr <andi@splitbrain.org>
- *
- * @param string $file file name
- */
- function io_makeFileDir($file){
- $dir = dirname($file);
- if(!@is_dir($dir)){
- io_mkdir_p($dir) || msg("Creating directory $dir failed",-1);
- }
- }
- /**
- * Creates a directory hierachy.
- *
- * @link http://php.net/manual/en/function.mkdir.php
- * @author <saint@corenova.com>
- * @author Andreas Gohr <andi@splitbrain.org>
- *
- * @param string $target filename
- * @return bool|int|string
- */
- function io_mkdir_p($target){
- global $conf;
- if (@is_dir($target)||empty($target)) return 1; // best case check first
- if (file_exists($target) && !is_dir($target)) return 0;
- //recursion
- if (io_mkdir_p(substr($target,0,strrpos($target,'/')))){
- $ret = @mkdir($target); // crawl back up & create dir tree
- if($ret && !empty($conf['dperm'])) chmod($target, $conf['dperm']);
- return $ret;
- }
- return 0;
- }
- /**
- * Recursively delete a directory
- *
- * @author Andreas Gohr <andi@splitbrain.org>
- * @param string $path
- * @param bool $removefiles defaults to false which will delete empty directories only
- * @return bool
- */
- function io_rmdir($path, $removefiles = false) {
- if(!is_string($path) || $path == "") return false;
- if(!file_exists($path)) return true; // it's already gone or was never there, count as success
- if(is_dir($path) && !is_link($path)) {
- $dirs = array();
- $files = array();
- if(!$dh = @opendir($path)) return false;
- while(false !== ($f = readdir($dh))) {
- if($f == '..' || $f == '.') continue;
- // collect dirs and files first
- if(is_dir("$path/$f") && !is_link("$path/$f")) {
- $dirs[] = "$path/$f";
- } else if($removefiles) {
- $files[] = "$path/$f";
- } else {
- return false; // abort when non empty
- }
- }
- closedir($dh);
- // now traverse into directories first
- foreach($dirs as $dir) {
- if(!io_rmdir($dir, $removefiles)) return false; // abort on any error
- }
- // now delete files
- foreach($files as $file) {
- if(!@unlink($file)) return false; //abort on any error
- }
- // remove self
- return @rmdir($path);
- } else if($removefiles) {
- return @unlink($path);
- }
- return false;
- }
- /**
- * Creates a unique temporary directory and returns
- * its path.
- *
- * @author Michael Klier <chi@chimeric.de>
- *
- * @return false|string path to new directory or false
- */
- function io_mktmpdir() {
- global $conf;
- $base = $conf['tmpdir'];
- $dir = md5(uniqid(mt_rand(), true));
- $tmpdir = $base.'/'.$dir;
- if(io_mkdir_p($tmpdir)) {
- return($tmpdir);
- } else {
- return false;
- }
- }
- /**
- * downloads a file from the net and saves it
- *
- * if $useAttachment is false,
- * - $file is the full filename to save the file, incl. path
- * - if successful will return true, false otherwise
- *
- * if $useAttachment is true,
- * - $file is the directory where the file should be saved
- * - if successful will return the name used for the saved file, false otherwise
- *
- * @author Andreas Gohr <andi@splitbrain.org>
- * @author Chris Smith <chris@jalakai.co.uk>
- *
- * @param string $url url to download
- * @param string $file path to file or directory where to save
- * @param bool $useAttachment true: try to use name of download, uses otherwise $defaultName
- * false: uses $file as path to file
- * @param string $defaultName fallback for if using $useAttachment
- * @param int $maxSize maximum file size
- * @return bool|string if failed false, otherwise true or the name of the file in the given dir
- */
- function io_download($url,$file,$useAttachment=false,$defaultName='',$maxSize=2097152){
- global $conf;
- $http = new DokuHTTPClient();
- $http->max_bodysize = $maxSize;
- $http->timeout = 25; //max. 25 sec
- $http->keep_alive = false; // we do single ops here, no need for keep-alive
- $data = $http->get($url);
- if(!$data) return false;
- $name = '';
- if ($useAttachment) {
- if (isset($http->resp_headers['content-disposition'])) {
- $content_disposition = $http->resp_headers['content-disposition'];
- $match=array();
- if (is_string($content_disposition) &&
- preg_match('/attachment;\s*filename\s*=\s*"([^"]*)"/i', $content_disposition, $match)) {
- $name = \dokuwiki\Utf8\PhpString::basename($match[1]);
- }
- }
- if (!$name) {
- if (!$defaultName) return false;
- $name = $defaultName;
- }
- $file = $file.$name;
- }
- $fileexists = file_exists($file);
- $fp = @fopen($file,"w");
- if(!$fp) return false;
- fwrite($fp,$data);
- fclose($fp);
- if(!$fileexists and $conf['fperm']) chmod($file, $conf['fperm']);
- if ($useAttachment) return $name;
- return true;
- }
- /**
- * Windows compatible rename
- *
- * rename() can not overwrite existing files on Windows
- * this function will use copy/unlink instead
- *
- * @param string $from
- * @param string $to
- * @return bool succes or fail
- */
- function io_rename($from,$to){
- global $conf;
- if(!@rename($from,$to)){
- if(@copy($from,$to)){
- if($conf['fperm']) chmod($to, $conf['fperm']);
- @unlink($from);
- return true;
- }
- return false;
- }
- return true;
- }
- /**
- * Runs an external command with input and output pipes.
- * Returns the exit code from the process.
- *
- * @author Tom N Harris <tnharris@whoopdedo.org>
- *
- * @param string $cmd
- * @param string $input input pipe
- * @param string $output output pipe
- * @return int exit code from process
- */
- function io_exec($cmd, $input, &$output){
- $descspec = array(
- 0=>array("pipe","r"),
- 1=>array("pipe","w"),
- 2=>array("pipe","w"));
- $ph = proc_open($cmd, $descspec, $pipes);
- if(!$ph) return -1;
- fclose($pipes[2]); // ignore stderr
- fwrite($pipes[0], $input);
- fclose($pipes[0]);
- $output = stream_get_contents($pipes[1]);
- fclose($pipes[1]);
- return proc_close($ph);
- }
- /**
- * Search a file for matching lines
- *
- * This is probably not faster than file()+preg_grep() but less
- * memory intensive because not the whole file needs to be loaded
- * at once.
- *
- * @author Andreas Gohr <andi@splitbrain.org>
- * @param string $file The file to search
- * @param string $pattern PCRE pattern
- * @param int $max How many lines to return (0 for all)
- * @param bool $backref When true returns array with backreferences instead of lines
- * @return array matching lines or backref, false on error
- */
- function io_grep($file,$pattern,$max=0,$backref=false){
- $fh = @fopen($file,'r');
- if(!$fh) return false;
- $matches = array();
- $cnt = 0;
- $line = '';
- while (!feof($fh)) {
- $line .= fgets($fh, 4096); // read full line
- if(substr($line,-1) != "\n") continue;
- // check if line matches
- if(preg_match($pattern,$line,$match)){
- if($backref){
- $matches[] = $match;
- }else{
- $matches[] = $line;
- }
- $cnt++;
- }
- if($max && $max == $cnt) break;
- $line = '';
- }
- fclose($fh);
- return $matches;
- }
- /**
- * Get size of contents of a file, for a compressed file the uncompressed size
- * Warning: reading uncompressed size of content of bz-files requires uncompressing
- *
- * @author Gerrit Uitslag <klapinklapin@gmail.com>
- *
- * @param string $file filename path to file
- * @return int size of file
- */
- function io_getSizeFile($file) {
- if (!file_exists($file)) return 0;
- if(substr($file,-3) == '.gz'){
- $fp = @fopen($file, "rb");
- if($fp === false) return 0;
- fseek($fp, -4, SEEK_END);
- $buffer = fread($fp, 4);
- fclose($fp);
- $array = unpack("V", $buffer);
- $uncompressedsize = end($array);
- }else if(substr($file,-4) == '.bz2'){
- if(!DOKU_HAS_BZIP) return 0;
- $bz = bzopen($file,"r");
- if($bz === false) return 0;
- $uncompressedsize = 0;
- while (!feof($bz)) {
- //8192 seems to be the maximum buffersize?
- $buffer = bzread($bz,8192);
- if(($buffer === false) || (bzerrno($bz) !== 0)) {
- return 0;
- }
- $uncompressedsize += strlen($buffer);
- }
- }else{
- $uncompressedsize = filesize($file);
- }
- return $uncompressedsize;
- }
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