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<?php
/**
* PHPExcel_Reader_Abstract
*
* Copyright (c) 2006 - 2015 PHPExcel
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* @category PHPExcel
* @package PHPExcel_Reader
* @copyright Copyright (c) 2006 - 2015 PHPExcel (http://www.codeplex.com/PHPExcel)
* @license http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt LGPL
* @version ##VERSION##, ##DATE##
*/
abstract class PHPExcel_Reader_Abstract implements PHPExcel_Reader_IReader
{
/**
* Read data only?
* Identifies whether the Reader should only read data values for cells, and ignore any formatting information;
* or whether it should read both data and formatting
*
* @var boolean
*/
protected $readDataOnly = false;
/**
* Read empty cells?
* Identifies whether the Reader should read data values for cells all cells, or should ignore cells containing
* null value or empty string
*
* @var boolean
*/
protected $readEmptyCells = true;
/**
* Read charts that are defined in the workbook?
* Identifies whether the Reader should read the definitions for any charts that exist in the workbook;
*
* @var boolean
*/
protected $includeCharts = false;
/**
* Restrict which sheets should be loaded?
* This property holds an array of worksheet names to be loaded. If null, then all worksheets will be loaded.
*
* @var array of string
*/
protected $loadSheetsOnly;
/**
* PHPExcel_Reader_IReadFilter instance
*
* @var PHPExcel_Reader_IReadFilter
*/
protected $readFilter;
protected $fileHandle = null;
/**
* Read data only?
* If this is true, then the Reader will only read data values for cells, it will not read any formatting information.
* If false (the default) it will read data and formatting.
*
* @return boolean
*/
public function getReadDataOnly()
{
return $this->readDataOnly;
}
/**
* Set read data only
* Set to true, to advise the Reader only to read data values for cells, and to ignore any formatting information.
* Set to false (the default) to advise the Reader to read both data and formatting for cells.
*
* @param boolean $pValue
*
* @return PHPExcel_Reader_IReader
*/
public function setReadDataOnly($pValue = false)
{
$this->readDataOnly = $pValue;
return $this;
}
/**
* Read empty cells?
* If this is true (the default), then the Reader will read data values for all cells, irrespective of value.
* If false it will not read data for cells containing a null value or an empty string.
*
* @return boolean
*/
public function getReadEmptyCells()
{
return $this->readEmptyCells;
}
/**
* Set read empty cells
* Set to true (the default) to advise the Reader read data values for all cells, irrespective of value.
* Set to false to advise the Reader to ignore cells containing a null value or an empty string.
*
* @param boolean $pValue
*
* @return PHPExcel_Reader_IReader
*/
public function setReadEmptyCells($pValue = true)
{
$this->readEmptyCells = $pValue;
return $this;
}
/**
* Read charts in workbook?
* If this is true, then the Reader will include any charts that exist in the workbook.
* Note that a ReadDataOnly value of false overrides, and charts won't be read regardless of the IncludeCharts value.
* If false (the default) it will ignore any charts defined in the workbook file.
*
* @return boolean
*/
public function getIncludeCharts()
{
return $this->includeCharts;
}
/**
* Set read charts in workbook
* Set to true, to advise the Reader to include any charts that exist in the workbook.
* Note that a ReadDataOnly value of false overrides, and charts won't be read regardless of the IncludeCharts value.
* Set to false (the default) to discard charts.
*
* @param boolean $pValue
*
* @return PHPExcel_Reader_IReader
*/
public function setIncludeCharts($pValue = false)
{
$this->includeCharts = (boolean) $pValue;
return $this;
}
/**
* Get which sheets to load
* Returns either an array of worksheet names (the list of worksheets that should be loaded), or a null
* indicating that all worksheets in the workbook should be loaded.
*
* @return mixed
*/
public function getLoadSheetsOnly()
{
return $this->loadSheetsOnly;
}
/**
* Set which sheets to load
*
* @param mixed $value
* This should be either an array of worksheet names to be loaded, or a string containing a single worksheet name.
* If NULL, then it tells the Reader to read all worksheets in the workbook
*
* @return PHPExcel_Reader_IReader
*/
public function setLoadSheetsOnly($value = null)
{
if ($value === null) {
return $this->setLoadAllSheets();
}
$this->loadSheetsOnly = is_array($value) ? $value : array($value);
return $this;
}
/**
* Set all sheets to load
* Tells the Reader to load all worksheets from the workbook.
*
* @return PHPExcel_Reader_IReader
*/
public function setLoadAllSheets()
{
$this->loadSheetsOnly = null;
return $this;
}
/**
* Read filter
*
* @return PHPExcel_Reader_IReadFilter
*/
public function getReadFilter()
{
return $this->readFilter;
}
/**
* Set read filter
*
* @param PHPExcel_Reader_IReadFilter $pValue
* @return PHPExcel_Reader_IReader
*/
public function setReadFilter(PHPExcel_Reader_IReadFilter $pValue)
{
$this->readFilter = $pValue;
return $this;
}
/**
* Open file for reading
*
* @param string $pFilename
* @throws PHPExcel_Reader_Exception
* @return resource
*/
protected function openFile($pFilename)
{
// Check if file exists
if (!file_exists($pFilename) || !is_readable($pFilename)) {
throw new PHPExcel_Reader_Exception("Could not open " . $pFilename . " for reading! File does not exist.");
}
// Open file
$this->fileHandle = fopen($pFilename, 'r');
if ($this->fileHandle === false) {
throw new PHPExcel_Reader_Exception("Could not open file " . $pFilename . " for reading.");
}
}
/**
* Can the current PHPExcel_Reader_IReader read the file?
*
* @param string $pFilename
* @return boolean
* @throws PHPExcel_Reader_Exception
*/
public function canRead($pFilename)
{
// Check if file exists
try {
$this->openFile($pFilename);
} catch (Exception $e) {
return false;
}
$readable = $this->isValidFormat();
fclose($this->fileHandle);
return $readable;
}
/**
* Scan theXML for use of <!ENTITY to prevent XXE/XEE attacks
*
* @param string $xml
* @throws PHPExcel_Reader_Exception
*/
public function securityScan($xml)
{
$pattern = '/\\0?' . implode('\\0?', str_split('<!DOCTYPE')) . '\\0?/';
if (preg_match($pattern, $xml)) {
throw new PHPExcel_Reader_Exception('Detected use of ENTITY in XML, spreadsheet file load() aborted to prevent XXE/XEE attacks');
}
return $xml;
}
/**
* Scan theXML for use of <!ENTITY to prevent XXE/XEE attacks
*
* @param string $filestream
* @throws PHPExcel_Reader_Exception
*/
public function securityScanFile($filestream)
{
return $this->securityScan(file_get_contents($filestream));
}
}
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