TikaApacheExtractor.inc.php
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<?php
/**
* $Id:$
*
* KnowledgeTree Community Edition
* Document Management Made Simple
* Copyright (C) 2008, 2009 KnowledgeTree Inc.
* Portions copyright The Jam Warehouse Software (Pty) Limited
*
* 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 TikaApacheExtractor extends DocumentExtractor
{
public function __construct()
{
$config =& KTConfig::getSingleton();
$javaServerUrl = $config->get('indexer/javaLuceneURL');
$this->xmlrpc = XmlRpcLucene::get($javaServerUrl);
}
/**
* Display name for the extractor
*
* @return string
*/
public function getDisplayName()
{
return _kt('Tika Apache Extractor');
}
public function needsIntermediateSourceFile()
{
return true;
}
/**
* The mime types supported by the extractor
*
* @return array
*/
public function getSupportedMimeTypes()
{
return array(
// pdf
'application/pdf',
// office OLE2 format - 2003, xp, etc
'application/vnd.ms-excel',
'application/vnd.ms-powerpoint',
'application/msword',
// msg files
'application/vnd.ms-outlook',
// rtf
'text/rtf',
// staroffice
'application/vnd.sun.xml.writer',
'application/vnd.sun.xml.writer.template',
'application/vnd.sun.xml.calc',
'application/vnd.sun.xml.calc.template',
// text
'text/plain',
'text/csv',
'text/tab-separated-values',
'text/css',
// open xml
/*
'application/vnd.openxmlformats-officedocument.wordprocessingml.document',
'application/vnd.openxmlformats-officedocument.wordprocessingml.template',
'application/vnd.openxmlformats-officedocument.presentationml.template',
'application/vnd.openxmlformats-officedocument.presentationml.slideshow',
'application/vnd.openxmlformats-officedocument.presentationml.presentation',
'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet',
'application/vnd.openxmlformats-officedocument.spreadsheetml.template',
// openoffice
'application/vnd.oasis.opendocument.presentation',
'application/vnd.oasis.opendocument.presentation-template',
'application/vnd.oasis.opendocument.spreadsheet',
'application/vnd.oasis.opendocument.spreadsheet-template',
'application/vnd.oasis.opendocument.text',
'application/vnd.oasis.opendocument.text-template',
'application/vnd.oasis.opendocument.text-master',
// xml
'text/xml',
'application/xml',
'text/html',
'text/enriched'
*/
);
}
/**
* Method to extract the content
*
* @return boolean
*/
public function extractTextContent()
{
$filename = $this->sourcefile;
$targetFile = $this->targetfile;
$result = $this->xmlrpc->extractTextContent($filename, $targetFile);
if($result === false){
$this->output = _kt('Tika Extractor: XML-RPC failed to extract text.');
return false;
}
return true;
/* Using streamed content
// stream document content
$filename = $this->sourcefile;
$buffer = file_get_contents($filename);
if(empty($buffer)){
$this->output = _kt('Document contained no content');
return false;
}
// Pass the content stream to the XML-RPC for extraction
$extractedText = $this->xmlrpc->extractTextContent($buffer);
unset($buffer);
if($extractedText === false){
$this->output = _kt('Tika Extractor: XML-RPC failed to extract text.');
return false;
}
file_put_contents($this->targetfile, $extractedText);
unset($extractedText);
return true;
*/
}
/**
* Method to determine whether a connection can be established with the java server
*/
public function diagnose()
{
// check that the java server is running and can be accessed
$config =& KTConfig::getSingleton();
$javaLuceneURL = $config->get('indexer/javaLuceneURL');
list($protocol, $host, $port) = explode(':', $javaLuceneURL);
if (empty($port)) $port == 8875;
if (substr($host, 0, 2) == '//') $host = substr($host, 2);
$connection = @fsockopen($host, $port, $errno, $errstr, 2);
if (false === $connection)
{
return sprintf(_kt("Cannot connect to the Tika Extractor on '%s'."), $javaLuceneURL);
}
fclose($connection);
return null;
}
}
?>