782 lines
22 KiB
PHP
782 lines
22 KiB
PHP
<?php
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/**
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* File IO functions
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*
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* @license GPL 2 (http://www.gnu.org/licenses/gpl.html)
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* @author Andreas Gohr <andi@splitbrain.org>
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*/
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use dokuwiki\HTTP\DokuHTTPClient;
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use dokuwiki\Extension\Event;
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/**
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* Removes empty directories
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*
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* Sends IO_NAMESPACE_DELETED events for 'pages' and 'media' namespaces.
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* Event data:
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* $data[0] ns: The colon separated namespace path minus the trailing page name.
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* $data[1] ns_type: 'pages' or 'media' namespace tree.
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*
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* @param string $id - a pageid, the namespace of that id will be tried to deleted
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* @param string $basedir - the config name of the type to delete (datadir or mediadir usally)
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* @return bool - true if at least one namespace was deleted
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*
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* @author Andreas Gohr <andi@splitbrain.org>
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* @author Ben Coburn <btcoburn@silicodon.net>
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*/
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function io_sweepNS($id,$basedir='datadir'){
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global $conf;
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$types = array ('datadir'=>'pages', 'mediadir'=>'media');
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$ns_type = (isset($types[$basedir])?$types[$basedir]:false);
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$delone = false;
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//scan all namespaces
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while(($id = getNS($id)) !== false){
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$dir = $conf[$basedir].'/'.utf8_encodeFN(str_replace(':','/',$id));
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//try to delete dir else return
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if(@rmdir($dir)) {
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if ($ns_type!==false) {
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$data = array($id, $ns_type);
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$delone = true; // we deleted at least one dir
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Event::createAndTrigger('IO_NAMESPACE_DELETED', $data);
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}
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} else { return $delone; }
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}
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return $delone;
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}
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/**
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* Used to read in a DokuWiki page from file, and send IO_WIKIPAGE_READ events.
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*
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* Generates the action event which delegates to io_readFile().
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* Action plugins are allowed to modify the page content in transit.
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* The file path should not be changed.
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*
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* Event data:
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* $data[0] The raw arguments for io_readFile as an array.
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* $data[1] ns: The colon separated namespace path minus the trailing page name. (false if root ns)
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* $data[2] page_name: The wiki page name.
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* $data[3] rev: The page revision, false for current wiki pages.
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*
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* @author Ben Coburn <btcoburn@silicodon.net>
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*
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* @param string $file filename
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* @param string $id page id
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* @param bool|int $rev revision timestamp
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* @return string
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*/
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function io_readWikiPage($file, $id, $rev=false) {
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if (empty($rev)) { $rev = false; }
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$data = array(array($file, true), getNS($id), noNS($id), $rev);
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return Event::createAndTrigger('IO_WIKIPAGE_READ', $data, '_io_readWikiPage_action', false);
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}
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/**
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* Callback adapter for io_readFile().
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*
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* @author Ben Coburn <btcoburn@silicodon.net>
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*
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* @param array $data event data
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* @return string
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*/
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function _io_readWikiPage_action($data) {
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if (is_array($data) && is_array($data[0]) && count($data[0])===2) {
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return call_user_func_array('io_readFile', $data[0]);
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} else {
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return ''; //callback error
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}
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}
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/**
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* Returns content of $file as cleaned string.
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*
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* Uses gzip if extension is .gz
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*
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* If you want to use the returned value in unserialize
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* be sure to set $clean to false!
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*
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* @author Andreas Gohr <andi@splitbrain.org>
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*
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* @param string $file filename
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* @param bool $clean
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* @return string|bool the file contents or false on error
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*/
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function io_readFile($file,$clean=true){
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$ret = '';
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if(file_exists($file)){
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if(substr($file,-3) == '.gz'){
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if(!DOKU_HAS_GZIP) return false;
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$ret = gzfile($file);
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if(is_array($ret)) $ret = join('', $ret);
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}else if(substr($file,-4) == '.bz2'){
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if(!DOKU_HAS_BZIP) return false;
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$ret = bzfile($file);
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}else{
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$ret = file_get_contents($file);
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}
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}
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if($ret === null) return false;
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if($ret !== false && $clean){
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return cleanText($ret);
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}else{
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return $ret;
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}
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}
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/**
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* Returns the content of a .bz2 compressed file as string
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*
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* @author marcel senf <marcel@rucksackreinigung.de>
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* @author Andreas Gohr <andi@splitbrain.org>
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*
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* @param string $file filename
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* @param bool $array return array of lines
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* @return string|array|bool content or false on error
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*/
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function bzfile($file, $array=false) {
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$bz = bzopen($file,"r");
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if($bz === false) return false;
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if($array) $lines = array();
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$str = '';
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while (!feof($bz)) {
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//8192 seems to be the maximum buffersize?
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$buffer = bzread($bz,8192);
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if(($buffer === false) || (bzerrno($bz) !== 0)) {
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return false;
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}
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$str = $str . $buffer;
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if($array) {
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$pos = strpos($str, "\n");
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while($pos !== false) {
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$lines[] = substr($str, 0, $pos+1);
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$str = substr($str, $pos+1);
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$pos = strpos($str, "\n");
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}
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}
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}
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bzclose($bz);
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if($array) {
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if($str !== '') $lines[] = $str;
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return $lines;
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}
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return $str;
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}
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/**
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* Used to write out a DokuWiki page to file, and send IO_WIKIPAGE_WRITE events.
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*
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* This generates an action event and delegates to io_saveFile().
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* Action plugins are allowed to modify the page content in transit.
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* The file path should not be changed.
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* (The append parameter is set to false.)
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*
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* Event data:
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* $data[0] The raw arguments for io_saveFile as an array.
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* $data[1] ns: The colon separated namespace path minus the trailing page name. (false if root ns)
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* $data[2] page_name: The wiki page name.
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* $data[3] rev: The page revision, false for current wiki pages.
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*
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* @author Ben Coburn <btcoburn@silicodon.net>
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*
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* @param string $file filename
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* @param string $content
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* @param string $id page id
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* @param int|bool $rev timestamp of revision
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* @return bool
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*/
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function io_writeWikiPage($file, $content, $id, $rev=false) {
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if (empty($rev)) { $rev = false; }
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if ($rev===false) { io_createNamespace($id); } // create namespaces as needed
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$data = array(array($file, $content, false), getNS($id), noNS($id), $rev);
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return Event::createAndTrigger('IO_WIKIPAGE_WRITE', $data, '_io_writeWikiPage_action', false);
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}
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/**
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* Callback adapter for io_saveFile().
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* @author Ben Coburn <btcoburn@silicodon.net>
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*
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* @param array $data event data
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* @return bool
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*/
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function _io_writeWikiPage_action($data) {
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if (is_array($data) && is_array($data[0]) && count($data[0])===3) {
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$ok = call_user_func_array('io_saveFile', $data[0]);
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// for attic files make sure the file has the mtime of the revision
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if($ok && is_int($data[3]) && $data[3] > 0) {
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@touch($data[0][0], $data[3]);
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}
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return $ok;
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} else {
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return false; //callback error
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}
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}
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/**
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* Internal function to save contents to a file.
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*
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* @author Andreas Gohr <andi@splitbrain.org>
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*
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* @param string $file filename path to file
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* @param string $content
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* @param bool $append
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* @return bool true on success, otherwise false
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*/
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function _io_saveFile($file, $content, $append) {
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global $conf;
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$mode = ($append) ? 'ab' : 'wb';
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$fileexists = file_exists($file);
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if(substr($file,-3) == '.gz'){
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if(!DOKU_HAS_GZIP) return false;
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$fh = @gzopen($file,$mode.'9');
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if(!$fh) return false;
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gzwrite($fh, $content);
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gzclose($fh);
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}else if(substr($file,-4) == '.bz2'){
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if(!DOKU_HAS_BZIP) return false;
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if($append) {
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$bzcontent = bzfile($file);
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if($bzcontent === false) return false;
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$content = $bzcontent.$content;
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}
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$fh = @bzopen($file,'w');
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if(!$fh) return false;
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bzwrite($fh, $content);
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bzclose($fh);
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}else{
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$fh = @fopen($file,$mode);
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if(!$fh) return false;
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fwrite($fh, $content);
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fclose($fh);
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}
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if(!$fileexists and $conf['fperm']) chmod($file, $conf['fperm']);
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return true;
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}
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/**
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* Saves $content to $file.
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*
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* If the third parameter is set to true the given content
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* will be appended.
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*
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* Uses gzip if extension is .gz
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* and bz2 if extension is .bz2
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*
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* @author Andreas Gohr <andi@splitbrain.org>
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*
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* @param string $file filename path to file
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* @param string $content
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* @param bool $append
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* @return bool true on success, otherwise false
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*/
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function io_saveFile($file, $content, $append=false) {
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io_makeFileDir($file);
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io_lock($file);
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if(!_io_saveFile($file, $content, $append)) {
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msg("Writing $file failed",-1);
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io_unlock($file);
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return false;
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}
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io_unlock($file);
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return true;
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}
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/**
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* Replace one or more occurrences of a line in a file.
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*
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* The default, when $maxlines is 0 is to delete all matching lines then append a single line.
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* A regex that matches any part of the line will remove the entire line in this mode.
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* Captures in $newline are not available.
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*
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* Otherwise each line is matched and replaced individually, up to the first $maxlines lines
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* or all lines if $maxlines is -1. If $regex is true then captures can be used in $newline.
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*
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* Be sure to include the trailing newline in $oldline when replacing entire lines.
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*
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* Uses gzip if extension is .gz
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* and bz2 if extension is .bz2
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*
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* @author Steven Danz <steven-danz@kc.rr.com>
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* @author Christopher Smith <chris@jalakai.co.uk>
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* @author Patrick Brown <ptbrown@whoopdedo.org>
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*
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* @param string $file filename
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* @param string $oldline exact linematch to remove
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* @param string $newline new line to insert
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* @param bool $regex use regexp?
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* @param int $maxlines number of occurrences of the line to replace
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* @return bool true on success
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*/
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function io_replaceInFile($file, $oldline, $newline, $regex=false, $maxlines=0) {
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if ((string)$oldline === '') {
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trigger_error('$oldline parameter cannot be empty in io_replaceInFile()', E_USER_WARNING);
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return false;
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}
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if (!file_exists($file)) return true;
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io_lock($file);
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// load into array
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if(substr($file,-3) == '.gz'){
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if(!DOKU_HAS_GZIP) return false;
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$lines = gzfile($file);
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}else if(substr($file,-4) == '.bz2'){
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if(!DOKU_HAS_BZIP) return false;
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$lines = bzfile($file, true);
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}else{
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$lines = file($file);
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}
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// make non-regexes into regexes
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$pattern = $regex ? $oldline : '/^'.preg_quote($oldline,'/').'$/';
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$replace = $regex ? $newline : addcslashes($newline, '\$');
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// remove matching lines
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if ($maxlines > 0) {
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$count = 0;
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$matched = 0;
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foreach($lines as $i => $line) {
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if($count >= $maxlines) break;
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// $matched will be set to 0|1 depending on whether pattern is matched and line replaced
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$lines[$i] = preg_replace($pattern, $replace, $line, -1, $matched);
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if ($matched) $count++;
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}
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} else if ($maxlines == 0) {
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$lines = preg_grep($pattern, $lines, PREG_GREP_INVERT);
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if ((string)$newline !== ''){
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$lines[] = $newline;
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}
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} else {
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$lines = preg_replace($pattern, $replace, $lines);
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}
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if(count($lines)){
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if(!_io_saveFile($file, join('',$lines), false)) {
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msg("Removing content from $file failed",-1);
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io_unlock($file);
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return false;
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}
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}else{
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@unlink($file);
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}
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io_unlock($file);
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return true;
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}
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/**
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* Delete lines that match $badline from $file.
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*
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* Be sure to include the trailing newline in $badline
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*
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* @author Patrick Brown <ptbrown@whoopdedo.org>
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*
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* @param string $file filename
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* @param string $badline exact linematch to remove
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* @param bool $regex use regexp?
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* @return bool true on success
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*/
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function io_deleteFromFile($file,$badline,$regex=false){
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return io_replaceInFile($file,$badline,null,$regex,0);
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}
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/**
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* Tries to lock a file
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*
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* Locking is only done for io_savefile and uses directories
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* inside $conf['lockdir']
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*
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* It waits maximal 3 seconds for the lock, after this time
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* the lock is assumed to be stale and the function goes on
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*
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* @author Andreas Gohr <andi@splitbrain.org>
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*
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* @param string $file filename
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*/
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function io_lock($file){
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global $conf;
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$lockDir = $conf['lockdir'].'/'.md5($file);
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@ignore_user_abort(1);
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$timeStart = time();
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do {
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//waited longer than 3 seconds? -> stale lock
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if ((time() - $timeStart) > 3) break;
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$locked = @mkdir($lockDir, $conf['dmode']);
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if($locked){
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if(!empty($conf['dperm'])) chmod($lockDir, $conf['dperm']);
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break;
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}
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usleep(50);
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} while ($locked === false);
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}
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/**
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* Unlocks a file
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*
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* @author Andreas Gohr <andi@splitbrain.org>
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*
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* @param string $file filename
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*/
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function io_unlock($file){
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global $conf;
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$lockDir = $conf['lockdir'].'/'.md5($file);
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@rmdir($lockDir);
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@ignore_user_abort(0);
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}
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/**
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* Create missing namespace directories and send the IO_NAMESPACE_CREATED events
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* in the order of directory creation. (Parent directories first.)
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*
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* Event data:
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* $data[0] ns: The colon separated namespace path minus the trailing page name.
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* $data[1] ns_type: 'pages' or 'media' namespace tree.
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*
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* @author Ben Coburn <btcoburn@silicodon.net>
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*
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* @param string $id page id
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* @param string $ns_type 'pages' or 'media'
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*/
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function io_createNamespace($id, $ns_type='pages') {
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// verify ns_type
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$types = array('pages'=>'wikiFN', 'media'=>'mediaFN');
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if (!isset($types[$ns_type])) {
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trigger_error('Bad $ns_type parameter for io_createNamespace().');
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return;
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}
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// make event list
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$missing = array();
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$ns_stack = explode(':', $id);
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$ns = $id;
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$tmp = dirname( $file = call_user_func($types[$ns_type], $ns) );
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while (!@is_dir($tmp) && !(file_exists($tmp) && !is_dir($tmp))) {
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array_pop($ns_stack);
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$ns = implode(':', $ns_stack);
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if (strlen($ns)==0) { break; }
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$missing[] = $ns;
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$tmp = dirname(call_user_func($types[$ns_type], $ns));
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}
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// make directories
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io_makeFileDir($file);
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// send the events
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$missing = array_reverse($missing); // inside out
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foreach ($missing as $ns) {
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$data = array($ns, $ns_type);
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Event::createAndTrigger('IO_NAMESPACE_CREATED', $data);
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}
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}
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/**
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* Create the directory needed for the given file
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*
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* @author Andreas Gohr <andi@splitbrain.org>
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*
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* @param string $file file name
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*/
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function io_makeFileDir($file){
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$dir = dirname($file);
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if(!@is_dir($dir)){
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io_mkdir_p($dir) || msg("Creating directory $dir failed",-1);
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}
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}
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/**
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* Creates a directory hierachy.
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*
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* @link http://php.net/manual/en/function.mkdir.php
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* @author <saint@corenova.com>
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* @author Andreas Gohr <andi@splitbrain.org>
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*
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* @param string $target filename
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* @return bool|int|string
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*/
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function io_mkdir_p($target){
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global $conf;
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if (@is_dir($target)||empty($target)) return 1; // best case check first
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if (file_exists($target) && !is_dir($target)) return 0;
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//recursion
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if (io_mkdir_p(substr($target,0,strrpos($target,'/')))){
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$ret = @mkdir($target,$conf['dmode']); // 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;
|
|
}
|