317 Zeilen
9.6 KiB
PHP
317 Zeilen
9.6 KiB
PHP
<?php
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/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
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/**
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* Recursively uncompress every file it finds
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*
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* PHP versions 4 and 5
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330,Boston,MA 02111-1307 USA
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*
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* @category File Formats
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* @package File_Archive
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* @author Vincent Lascaux <vincentlascaux@php.net>
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* @copyright 1997-2005 The PHP Group
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* @license http://www.gnu.org/copyleft/lesser.html LGPL
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* @version CVS: $Id: Uncompress.php 2 2010-11-23 14:32:26Z oldperl $
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* @link http://pear.php.net/package/File_Archive
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*/
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require_once "File/Archive/Reader.php";
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require_once "File/Archive/Reader/ChangeName/AddDirectory.php";
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/**
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* Recursively uncompress every file it finds
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*/
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class File_Archive_Reader_Uncompress extends File_Archive_Reader_Relay
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{
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/**
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* @var Array Stack of readers
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* @access private
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*/
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var $readers = array();
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/**
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* @var array of readers to close when closing $this
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* @access private
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*/
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var $toClose = array();
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/**
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* @var File_Archive_Reader Reader from which all started (usefull to be
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* able to close)
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* @access private
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*/
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var $startReader;
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/**
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* @var Int Maximum depth of uncompression after the basicDir
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* (that may contain some uncompression also)
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* -1 means no limit
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* @access private
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*/
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var $uncompressionLevel;
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/**
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* @var array Only files starting with $baseDir will be reported
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* This array contains explode('/', $directoryName)
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* @access private
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*/
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var $baseDir = '';
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/**
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* @var int Compression level required to go to reach the baseDir
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* or null if it is currently being computed
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* @access private
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*/
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var $baseDirCompressionLevel = null;
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/**
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* @var int We are selecting substr($baseDir, 0, $baseDirProgression)
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*/
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var $baseDirProgression = 0;
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/**
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* @var boolean Flag set to indicate that the current file has not been
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* displayed
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*/
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var $currentFileNotDisplayed = false;
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function File_Archive_Reader_Uncompress(
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&$innerReader, $uncompressionLevel = -1)
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{
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parent::File_Archive_Reader_Relay($innerReader);
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$this->startReader =& $innerReader;
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$this->uncompressionLevel = $uncompressionLevel;
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}
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/**
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* Attempt to change the current source (if the current file is an archive)
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* If this is the case, push the current source onto the stack and make the
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* good archive reader the current source. A file is considered as an
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* archive if its extension is one of tar, gz, zip, tgz
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*
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* @return bool whether the source has been pushed or not
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* @access private
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*/
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function push()
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{
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$filename = $this->source->getFilename();
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if (substr($filename, -1) == '/') { //it's a directory
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return false;
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}
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if ($this->uncompressionLevel >= 0 &&
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$this->baseDirCompressionLevel !== null &&
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count($this->readers) >= $this->uncompressionLevel
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) {
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return false;
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}
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// Check the extension of the file (maybe we need to uncompress it?)
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$extensions = explode('.', strtolower($filename));
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$reader =& $this->source;
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$nbUncompressions = 0;
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while (($extension = array_pop($extensions)) !== null) {
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$nbUncompressions++;
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unset($next);
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$next = File_Archive::readArchive($extension, $reader, $nbUncompressions == 1);
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if ($next === false) {
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$extensions = array();
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} else {
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unset($reader);
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$reader =& $next;
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}
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}
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if ($nbUncompressions == 1) {
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return false;
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} else {
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$this->readers[count($this->readers)] =& $this->source;
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unset($this->source);
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$this->source = new File_Archive_Reader_ChangeName_AddDirectory(
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$filename, $reader
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);
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return true;
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}
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}
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/**
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* @see File_Archive_Reader::close()
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*/
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function next()
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{
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if ($this->currentFileNotDisplayed) {
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$this->currentFileNotDisplayed = false;
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return true;
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}
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do {
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do {
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$selection = substr($this->baseDir, 0, $this->baseDirProgression);
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if ($selection === false) {
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$selection = '';
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}
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$error = $this->source->select($selection, false);
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if (PEAR::isError($error)) {
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return $error;
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}
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if (!$error) {
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if (empty($this->readers)) {
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return false;
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}
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$this->source->close();
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unset($this->source);
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$this->source =& $this->readers[count($this->readers)-1];
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unset($this->readers[count($this->readers)-1]);
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}
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} while (!$error);
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$filename = $this->source->getFilename();
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if (strlen($filename) < strlen($this->baseDir)) {
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$goodFile = (strncmp($filename, $this->baseDir, strlen($filename)) == 0 &&
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$this->baseDir{strlen($filename)} == '/');
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if ($goodFile) {
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if (strlen($filename) + 2 < strlen($this->baseDirProgression)) {
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$this->baseDirProgression = strpos($this->baseDir, '/', strlen($filename)+2);
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if ($this->baseDirProgression === false) {
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$this->baseDirProgression = strlen($this->baseDir);
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}
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} else {
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$this->baseDirProgression = strlen($this->baseDir);
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}
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}
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} else {
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$goodFile = (strncmp($filename, $this->baseDir, strlen($this->baseDir)) == 0);
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if ($goodFile) {
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$this->baseDirProgression = strlen($this->baseDir);
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}
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}
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} while (($goodFile && $this->push()) || !$goodFile);
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return true;
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}
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/**
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* Efficiently filter out the files which URL does not start with $baseDir
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* Throws an error if the $baseDir can't be found
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* @return bool Whether baseDir was a directory or a file
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*/
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function setBaseDir($baseDir)
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{
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$this->baseDir = $baseDir;
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$this->baseDirProgression = strpos($baseDir, '/');
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if ($this->baseDirProgression === false) {
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$this->baseDirProgression = strlen($baseDir);
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}
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$error = $this->next();
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if ($error === false) {
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return PEAR::raiseError("No directory $baseDir in inner reader");
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} else if (PEAR::isError($error)) {
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return $error;
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}
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$this->currentFileNotDisplayed = true;
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return strlen($this->getFilename())>strlen($baseDir);
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}
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/**
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* @see File_Archive_Reader::select()
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*/
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function select($filename, $close = true)
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{
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if ($close) {
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$error = $this->close();
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if (PEAR::isError($close)) {
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return $error;
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}
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}
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$oldBaseDir = $this->baseDir;
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$oldProgression = $this->baseDirProgression;
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$this->baseDir = $filename;
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$this->baseDirProgression = 0;
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$res = $this->next();
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$this->baseDir = $oldBaseDir;
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$this->baseDirProgression = $oldProgression;
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return $res;
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}
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/**
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* @see File_Archive_Reader::close()
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*/
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function close()
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{
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for ($i=0; $i<count($this->readers); ++$i) {
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$this->readers[$i]->close();
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}
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//var_dump($this->toClose);
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for ($i=0; $i<count($this->toClose); ++$i) {
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if ($this->toClose[$i] !== null) {
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$this->toClose[$i]->close();
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}
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}
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$this->readers = array();
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$this->toClose = array();
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$error = parent::close();
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$this->baseDirCompressionLevel = null;
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$this->baseDirProgression = 0;
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unset($this->source);
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$this->source =& $this->startReader;
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$this->source->close();
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$this->currentFileNotDisplayed = false;
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return $error;
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}
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/**
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* @see File_Archive_Reader::makeAppendWriter()
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*/
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function makeAppendWriter()
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{
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//The reader needs to be open so that the base dir is found
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$error = $this->next();
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if (PEAR::isError($error)) {
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return $error;
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}
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return parent::makeAppendWriter();
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}
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/**
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* @see File_Archive_Reader::makeWriterRemoveFiles()
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*/
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function makeWriterRemoveFiles($pred)
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{
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//The reader needs to be open so that the base dir is found
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$error = $this->next();
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if (PEAR::isError($error)) {
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return $error;
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}
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return parent::makeWriterRemoveFiles($pred);
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}
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}
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?>
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