PDFExtractor.inc.php
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<?php
/**
* $Id:$
*
* KnowledgeTree Community Edition
* Document Management Made Simple
* Copyright (C) 2008, 2009, 2010 KnowledgeTree Inc.
*
*
* This program is free software; you can redistribute it and/or modify it under
* the terms of the GNU General Public License version 3 as published by the
* Free Software Foundation.
*
* This program 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 General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* You can contact KnowledgeTree Inc., PO Box 7775 #87847, San Francisco,
* California 94120-7775, or email info@knowledgetree.com.
*
* The interactive user interfaces in modified source and object code versions
* of this program must display Appropriate Legal Notices, as required under
* Section 5 of the GNU General Public License version 3.
*
* In accordance with Section 7(b) of the GNU General Public License version 3,
* these Appropriate Legal Notices must retain the display of the "Powered by
* KnowledgeTree" logo and retain the original copyright notice. If the display of the
* logo is not reasonably feasible for technical reasons, the Appropriate Legal Notices
* must display the words "Powered by KnowledgeTree" and retain the original
* copyright notice.
* Contributor( s): ______________________________________
*
*/
class PDFExtractor extends ApplicationExtractor
{
public function __construct()
{
$config = KTConfig::getSingleton();
$params = $config->get('extractorParameters/pdftotext', '-nopgbrk -enc UTF-8 "{source}" "{target}"');
parent::__construct('externalBinary','pdftotext','pdftotext',_kt('PDF Text Extractor'),$params);
}
public function getSupportedMimeTypes()
{
return array();
return array('application/pdf');
}
protected function filter($text)
{
return $text;
}
protected function exec($cmd)
{
global $default;
$res = parent::exec($cmd);
if (false === $res && ((strpos($this->output, 'Copying of text from this document is not allowed') !== false) ||
(strpos($this->output, 'Incorrect password') !== false)))
{
$this->output = '';
file_put_contents($this->targetfile, _kt('Security properties on the PDF document prevent text from being extracted.'));
$default->log->info('Security properties on the PDF document prevent text from being extracted.');
return true;
}
if (false === $res && (strpos($this->output, 'PDF file is damaged') !== false))
{
$this->output = '';
$default->log->info('PDF file is damaged');
return true;
}
if (false === $res && (strpos($this->output, '(continuing anyway)') !== false))
{
$this->output = '';
return true;
}
if (false === $res && (strpos($this->output, 'font') !== false))
{
$this->output = '';
return true;
}
if (filesize($this->targetfile) > 0)
{
$this->output = '';
return true;
}
return $res;
}
}
?>