594 lines
16 KiB
PHP
594 lines
16 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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if(!defined('DOKU_INC')) die('meh.');
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require_once(DOKU_INC.'inc/common.php');
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require_once(DOKU_INC.'inc/HTTPClient.php');
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require_once(DOKU_INC.'inc/events.php');
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require_once(DOKU_INC.'inc/utf8.php');
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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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* @todo use safemode hack
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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 $basadir - the config name of the type to delete (datadir or mediadir usally)
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* @returns bool - true if at least one namespace was deleted
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* @author Andreas Gohr <andi@splitbrain.org>
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* @author Ben Coburn <btcoburn@silicodon.net>
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*/
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function io_sweepNS($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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trigger_event('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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* $data[3] rev: The page revision, false for current wiki pages.
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*
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* @author Ben Coburn <btcoburn@silicodon.net>
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*/
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function io_readWikiPage($file, $id, $rev=false) {
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if (empty($rev)) { $rev = false; }
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$data = array(array($file, false), getNS($id), noNS($id), $rev);
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return trigger_event('IO_WIKIPAGE_READ', $data, '_io_readWikiPage_action', false);
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}
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/**
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* Callback adapter for io_readFile().
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* @author Ben Coburn <btcoburn@silicodon.net>
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*/
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function _io_readWikiPage_action($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 $clean to false!
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*
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* @author Andreas Gohr <andi@splitbrain.org>
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*/
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function io_readFile($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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$ret = join('',gzfile($file));
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}else if(substr($file,-4) == '.bz2'){
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$ret = bzfile($file);
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}else{
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$ret = file_get_contents($file);
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}
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}
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if($clean){
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return cleanText($ret);
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}else{
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return $ret;
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}
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}
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/**
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* Returns the content of a .bz2 compressed file as string
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* @author marcel senf <marcel@rucksackreinigung.de>
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*/
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function bzfile($file){
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$bz = bzopen($file,"r");
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while (!feof($bz)){
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//8192 seems to be the maximum buffersize?
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$str = $str . bzread($bz,8192);
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}
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bzclose($bz);
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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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* $data[3] rev: The page revision, false for current wiki pages.
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*
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* @author Ben Coburn <btcoburn@silicodon.net>
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*/
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function io_writeWikiPage($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 trigger_event('IO_WIKIPAGE_WRITE', $data, '_io_writeWikiPage_action', false);
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}
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/**
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* Callback adapter for io_saveFile().
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* @author Ben Coburn <btcoburn@silicodon.net>
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*/
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function _io_writeWikiPage_action($data) {
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if (is_array($data) && is_array($data[0]) && count($data[0])===3) {
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return call_user_func_array('io_saveFile', $data[0]);
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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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* Saves $content to $file.
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*
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* If the third parameter is set to true the given content
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* will be appended.
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*
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* Uses gzip if extension is .gz
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* and bz2 if extension is .bz2
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*
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* @author Andreas Gohr <andi@splitbrain.org>
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* @return bool true on success
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*/
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function io_saveFile($file,$content,$append=false){
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global $conf;
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$mode = ($append) ? 'ab' : 'wb';
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$fileexists = @file_exists($file);
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io_makeFileDir($file);
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io_lock($file);
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if(substr($file,-3) == '.gz'){
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$fh = @gzopen($file,$mode.'9');
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if(!$fh){
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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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gzwrite($fh, $content);
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gzclose($fh);
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}else if(substr($file,-4) == '.bz2'){
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$fh = @bzopen($file,$mode{0});
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if(!$fh){
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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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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){
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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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fwrite($fh, $content);
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fclose($fh);
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}
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if(!$fileexists and !empty($conf['fperm'])) chmod($file, $conf['fperm']);
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io_unlock($file);
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return true;
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}
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/**
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* Delete exact linematch for $badline from $file.
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*
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* Be sure to include the trailing newline in $badline
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*
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* Uses gzip if extension is .gz
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*
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* 2005-10-14 : added regex option -- Christopher Smith <chris@jalakai.co.uk>
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*
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* @author Steven Danz <steven-danz@kc.rr.com>
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* @return bool true on success
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*/
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function io_deleteFromFile($file,$badline,$regex=false){
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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($file,-3) == '.gz'){
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$lines = gzfile($file);
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}else{
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$lines = file($file);
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}
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// remove all matching lines
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if ($regex) {
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$lines = preg_grep($badline,$lines,PREG_GREP_INVERT);
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} else {
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$pos = array_search($badline,$lines); //return null or false if not found
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while(is_int($pos)){
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unset($lines[$pos]);
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$pos = array_search($badline,$lines);
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}
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}
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if(count($lines)){
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$content = join('',$lines);
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if(substr($file,-3) == '.gz'){
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$fh = @gzopen($file,'wb9');
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if(!$fh){
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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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gzwrite($fh, $content);
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gzclose($fh);
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}else{
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$fh = @fopen($file,'wb');
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if(!$fh){
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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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fwrite($fh, $content);
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fclose($fh);
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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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* 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 $conf['lockdir']
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*
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* It waits maximal 3 seconds for the lock, after this time
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* the lock is assumed to be stale and the function goes on
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*
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* @author Andreas Gohr <andi@splitbrain.org>
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*/
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function io_lock($file){
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global $conf;
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// no locking if safemode hack
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if($conf['safemodehack']) return;
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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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function io_unlock($file){
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global $conf;
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// no locking if safemode hack
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if($conf['safemodehack']) return;
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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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* $data[1] ns_type: 'pages' or 'media' namespace tree.
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*
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* @author Ben Coburn <btcoburn@silicodon.net>
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*/
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function io_createNamespace($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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trigger_event('IO_NAMESPACE_CREATED', $data);
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}
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}
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/**
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* Create the directory needed for the given file
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*
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* @author Andreas Gohr <andi@splitbrain.org>
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*/
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function io_makeFileDir($file){
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global $conf;
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$dir = dirname($file);
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if(!@is_dir($dir)){
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io_mkdir_p($dir) || msg("Creating directory $dir failed",-1);
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}
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}
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/**
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* Creates a directory hierachy.
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*
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* @link http://www.php.net/manual/en/function.mkdir.php
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* @author <saint@corenova.com>
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* @author Andreas Gohr <andi@splitbrain.org>
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*/
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function io_mkdir_p($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($target,'/')))){
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if($conf['safemodehack']){
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$dir = preg_replace('/^'.preg_quote(fullpath($conf['ftp']['root']),'/').'/','', $target);
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return io_mkdir_ftp($dir);
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}else{
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$ret = @mkdir($target,$conf['dmode']); // crawl back up & create dir tree
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if($ret && $conf['dperm']) chmod($target, $conf['dperm']);
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return $ret;
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}
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}
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return 0;
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}
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/**
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* Creates a directory using FTP
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*
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* This is used when the safemode workaround is enabled
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*
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* @author <andi@splitbrain.org>
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*/
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function io_mkdir_ftp($dir){
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global $conf;
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if(!function_exists('ftp_connect')){
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msg("FTP support not found - safemode workaround not usable",-1);
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return false;
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}
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$conn = @ftp_connect($conf['ftp']['host'],$conf['ftp']['port'],10);
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if(!$conn){
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msg("FTP connection failed",-1);
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return false;
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}
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if(!@ftp_login($conn, $conf['ftp']['user'], conf_decodeString($conf['ftp']['pass']))){
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msg("FTP login failed",-1);
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return false;
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}
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//create directory
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$ok = @ftp_mkdir($conn, $dir);
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//set permissions
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@ftp_site($conn,sprintf("CHMOD %04o %s",$conf['dmode'],$dir));
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@ftp_close($conn);
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return $ok;
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}
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/**
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* Creates a unique temporary directory and returns
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* its path.
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*
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* @author Michael Klier <chi@chimeric.de>
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*/
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function io_mktmpdir() {
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global $conf;
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$base = $conf['tmpdir'];
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$dir = md5(uniqid(mt_rand(), true));
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$tmpdir = $base.'/'.$dir;
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if(io_mkdir_p($tmpdir)) {
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return($tmpdir);
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} else {
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return false;
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}
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}
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/**
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* downloads a file from the net and saves it
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*
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* if $useAttachment is false,
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* - $file is the full filename to save the file, incl. path
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* - if successful will return true, false otherwise
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*
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* if $useAttachment is true,
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* - $file is the directory where the file should be saved
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* - if successful will return the name used for the saved file, false otherwise
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*
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* @author Andreas Gohr <andi@splitbrain.org>
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* @author Chris Smith <chris@jalakai.co.uk>
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*/
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function io_download($url,$file,$useAttachment=false,$defaultName='',$maxSize=2097152){
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global $conf;
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$http = new DokuHTTPClient();
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$http->max_bodysize = $maxSize;
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$http->timeout = 25; //max. 25 sec
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$data = $http->get($url);
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if(!$data) return false;
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if ($useAttachment) {
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$name = '';
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if (isset($http->resp_headers['content-disposition'])) {
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$content_disposition = $http->resp_headers['content-disposition'];
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$match=array();
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if (is_string($content_disposition) &&
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preg_match('/attachment;\s*filename\s*=\s*"([^"]*)"/i', $content_disposition, $match)) {
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$name = basename($match[1]);
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}
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}
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if (!$name) {
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if (!$defaultName) return false;
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$name = $defaultName;
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}
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$file = $file.$name;
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}
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$fileexists = @file_exists($file);
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$fp = @fopen($file,"w");
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if(!$fp) return false;
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fwrite($fp,$data);
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fclose($fp);
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if(!$fileexists and $conf['fperm']) chmod($file, $conf['fperm']);
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if ($useAttachment) return $name;
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return true;
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}
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/**
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* Windows compatible rename
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*
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* rename() can not overwrite existing files on Windows
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* this function will use copy/unlink instead
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*/
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function io_rename($from,$to){
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global $conf;
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if(!@rename($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 and returns it's output as string
|
|
*
|
|
* @author Harry Brueckner <harry_b@eml.cc>
|
|
* @author Andreas Gohr <andi@splitbrain.org>
|
|
* @deprecated
|
|
*/
|
|
function io_runcmd($cmd){
|
|
$fh = popen($cmd, "r");
|
|
if(!$fh) return false;
|
|
$ret = '';
|
|
while (!feof($fh)) {
|
|
$ret .= fread($fh, 8192);
|
|
}
|
|
pclose($fh);
|
|
return $ret;
|
|
}
|
|
|
|
/**
|
|
* 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 $baxkref When true returns array with backreferences instead of lines
|
|
* @return matching lines or backref, false on error
|
|
*/
|
|
function io_grep($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;
|
|
}
|
|
|