silverstripe-textextraction/code/extractors/TikaServerTextExtractor.php

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2015-02-25 02:44:03 +01:00
<?php
/**
* Enables text extraction of file content via the Tika Rest Server
*
* {@link http://tika.apache.org/1.7/gettingstarted.html}
*/
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class TikaServerTextExtractor extends FileTextExtractor
{
/**
* Tika server is pretty efficient so use it immediately if available
*
* @var integer
* @config
*/
private static $priority = 80;
/**
* Server endpoint
*
* @var string
* @config
*/
private static $server_endpoint;
/**
* @var TikaRestClient
*/
protected $client = null;
/**
* @return TikaRestClient
*/
public function getClient()
{
return $this->client ?:
($this->client =
Injector::inst()->createWithArgs(
'TikaRestClient',
array($this->getServerEndpoint())
)
);
}
public function getServerEndpoint()
{
if (defined('SS_TIKA_ENDPOINT')) {
return SS_TIKA_ENDPOINT;
}
if (getenv('SS_TIKA_ENDPOINT')) {
return getenv('SS_TIKA_ENDPOINT');
}
// Default to configured endpoint
return $this->config()->server_endpoint;
}
/**
* Get the version of tika installed, or 0 if not installed
*
* @return float version of tika
*/
public function getVersion()
{
return $this
->getClient()
->getVersion();
}
public function isAvailable()
{
return $this->getServerEndpoint() &&
$this->getClient()->isAvailable() &&
$this->getVersion() >= 1.7;
}
public function supportsExtension($extension)
{
// Determine support via mime type only
return false;
}
/**
* Cache of supported mime types
*
* @var array
*/
protected $supportedMimes = array();
public function supportsMime($mime)
{
$supported = $this->supportedMimes ?:
($this->supportedMimes = $this->getClient()->getSupportedMimes());
// Check if supported (most common / quickest lookup)
if (isset($supported[$mime])) {
return true;
}
// Check aliases
foreach ($supported as $info) {
if (isset($info['alias']) && in_array($mime, $info['alias'])) {
return true;
}
}
return false;
}
public function getContent($path)
{
return $this->getClient()->tika($path);
}
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}