296 Zeilen
7.8 KiB
PHP
296 Zeilen
7.8 KiB
PHP
<?php
|
|
/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */
|
|
|
|
/**
|
|
* Reader that represents a single file
|
|
*
|
|
* PHP versions 4 and 5
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Lesser General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2.1 of the License, or (at your option) any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Lesser General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Lesser General Public
|
|
* License along with this library; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330,Boston,MA 02111-1307 USA
|
|
*
|
|
* @category File Formats
|
|
* @package File_Archive
|
|
* @author Vincent Lascaux <vincentlascaux@php.net>
|
|
* @copyright 1997-2005 The PHP Group
|
|
* @license http://www.gnu.org/copyleft/lesser.html LGPL
|
|
* @version CVS: $Id: File.php 2 2010-11-23 14:32:26Z oldperl $
|
|
* @link http://pear.php.net/package/File_Archive
|
|
*/
|
|
|
|
require_once "File/Archive/Reader.php";
|
|
require_once "MIME/Type.php";
|
|
|
|
/**
|
|
* Reader that represents a single file
|
|
*/
|
|
class File_Archive_Reader_File extends File_Archive_Reader
|
|
{
|
|
/**
|
|
* @var object Handle to the file being read
|
|
* @access private
|
|
*/
|
|
var $handle = null;
|
|
/**
|
|
* @var string Name of the physical file being read
|
|
* @access private
|
|
*/
|
|
var $filename;
|
|
/**
|
|
* @var string Name of the file returned by the reader
|
|
* @access private
|
|
*/
|
|
var $symbolic;
|
|
/**
|
|
* @var array Stats of the file
|
|
* Will only be set after a call to $this->getStat()
|
|
* @access private
|
|
*/
|
|
var $stat = null;
|
|
/**
|
|
* @var string Mime type of the file
|
|
* Will only be set after a call to $this->getMime()
|
|
*/
|
|
var $mime = null;
|
|
/**
|
|
* @var boolean Has the file already been read
|
|
* @access private
|
|
*/
|
|
var $alreadyRead = false;
|
|
|
|
/**
|
|
* $filename is the physical file to read
|
|
* $symbolic is the name declared by the reader
|
|
* If $symbolic is not specified, $filename is assumed
|
|
*/
|
|
function File_Archive_Reader_File($filename, $symbolic = null, $mime = null)
|
|
{
|
|
$this->filename = $filename;
|
|
$this->mime = $mime;
|
|
if ($symbolic === null) {
|
|
$this->symbolic = $this->getStandardURL($filename);
|
|
} else {
|
|
$this->symbolic = $this->getStandardURL($symbolic);
|
|
}
|
|
}
|
|
/**
|
|
* @see File_Archive_Reader::close()
|
|
*
|
|
* Close the file handle
|
|
*/
|
|
function close()
|
|
{
|
|
$this->alreadyRead = false;
|
|
if ($this->handle !== null) {
|
|
fclose($this->handle);
|
|
$this->handle = null;
|
|
}
|
|
}
|
|
/**
|
|
* @see File_Archive_Reader::next()
|
|
*
|
|
* The first time next is called, it will open the file handle and return
|
|
* true. Then it will return false
|
|
* Raise an error if the file does not exist
|
|
*/
|
|
function next()
|
|
{
|
|
if ($this->alreadyRead) {
|
|
return false;
|
|
} else {
|
|
$this->alreadyRead = true;
|
|
return true;
|
|
}
|
|
}
|
|
/**
|
|
* @see File_Archive_Reader::getFilename()
|
|
*/
|
|
function getFilename() { return $this->symbolic; }
|
|
/**
|
|
* @see File_Archive_Reader::getDataFilename()
|
|
*
|
|
* Return the name of the file
|
|
*/
|
|
function getDataFilename() { return $this->filename; }
|
|
/**
|
|
* @see File_Archive_Reader::getStat() stat()
|
|
*/
|
|
function getStat()
|
|
{
|
|
if ($this->stat === null) {
|
|
$this->stat = @stat($this->filename);
|
|
|
|
//If we can't use the stat function
|
|
if ($this->stat === false) {
|
|
$this->stat = array();
|
|
}
|
|
}
|
|
return $this->stat;
|
|
}
|
|
|
|
/**
|
|
* @see File_Archive_Reader::getMime
|
|
*/
|
|
function getMime()
|
|
{
|
|
if ($this->mime === null) {
|
|
PEAR::pushErrorHandling(PEAR_ERROR_RETURN);
|
|
$this->mime = MIME_Type::autoDetect($this->getDataFilename());
|
|
PEAR::popErrorHandling();
|
|
|
|
if (PEAR::isError($this->mime)) {
|
|
$this->mime = parent::getMime();
|
|
}
|
|
}
|
|
return $this->mime;
|
|
}
|
|
|
|
/**
|
|
* Opens the file if it was not already opened
|
|
*/
|
|
function _ensureFileOpened()
|
|
{
|
|
if ($this->handle === null) {
|
|
$this->handle = @fopen($this->filename, "r");
|
|
|
|
if (!is_resource($this->handle)) {
|
|
$this->handle = null;
|
|
return PEAR::raiseError("Can't open {$this->filename} for reading");
|
|
}
|
|
if ($this->handle === false) {
|
|
$this->handle = null;
|
|
return PEAR::raiseError("File {$this->filename} not found");
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @see File_Archive_Reader::getData()
|
|
*/
|
|
function getData($length = -1)
|
|
{
|
|
$error = $this->_ensureFileOpened();
|
|
if (PEAR::isError($error)) {
|
|
return $error;
|
|
}
|
|
|
|
if (feof($this->handle)) {
|
|
return null;
|
|
}
|
|
if ($length == -1) {
|
|
$contents = '';
|
|
$blockSize = File_Archive::getOption('blockSize');
|
|
while (!feof($this->handle)) {
|
|
$contents .= fread($this->handle, $blockSize);
|
|
}
|
|
return $contents;
|
|
} else {
|
|
if ($length == 0) {
|
|
return "";
|
|
} else {
|
|
return fread($this->handle, $length);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @see File_Archive_Reader::skip()
|
|
*/
|
|
function skip($length = -1)
|
|
{
|
|
$error = $this->_ensureFileOpened();
|
|
if (PEAR::isError($error)) {
|
|
return $error;
|
|
}
|
|
|
|
$before = ftell($this->handle);
|
|
if (($length == -1 && @fseek($this->handle, 0, SEEK_END) === -1) ||
|
|
($length >= 0 && @fseek($this->handle, $length, SEEK_CUR) === -1)) {
|
|
return parent::skip($length);
|
|
} else {
|
|
return ftell($this->handle) - $before;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @see File_Archive_Reader::rewind
|
|
*/
|
|
function rewind($length = -1)
|
|
{
|
|
if ($this->handle === null) {
|
|
return 0;
|
|
}
|
|
|
|
$before = ftell($this->handle);
|
|
if (($length == -1 && @fseek($this->handle, 0, SEEK_SET) === -1) ||
|
|
($length >= 0 && @fseek($this->handle, -$length, SEEK_CUR) === -1)) {
|
|
return parent::rewind($length);
|
|
} else {
|
|
return $before - ftell($this->handle);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* @see File_Archive_Reader::tell()
|
|
*/
|
|
function tell()
|
|
{
|
|
if ($this->handle === null) {
|
|
return 0;
|
|
} else {
|
|
return ftell($this->handle);
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* @see File_Archive_Reader::makeWriterRemoveFiles()
|
|
*/
|
|
function makeWriterRemoveFiles($pred)
|
|
{
|
|
return PEAR::raiseError(
|
|
'File_Archive_Reader_File represents a single file, you cant remove it');
|
|
}
|
|
|
|
/**
|
|
* @see File_Archive_Reader::makeWriterRemoveBlocks()
|
|
*/
|
|
function makeWriterRemoveBlocks($blocks, $seek = 0)
|
|
{
|
|
require_once "File/Archive/Writer/Files.php";
|
|
|
|
$writer = new File_Archive_Writer_Files();
|
|
|
|
$file = $this->getDataFilename();
|
|
$pos = $this->tell();
|
|
$this->close();
|
|
|
|
$writer->openFileRemoveBlock($file, $pos + $seek, $blocks);
|
|
|
|
return $writer;
|
|
}
|
|
|
|
/**
|
|
* @see File_Archive_Reader::makeAppendWriter
|
|
*/
|
|
function makeAppendWriter()
|
|
{
|
|
return PEAR::raiseError(
|
|
'File_Archive_Reader_File represents a single file.'.
|
|
' makeAppendWriter cant be executed on it'
|
|
);
|
|
}
|
|
}
|
|
|
|
?>
|