silverstripe-textextraction/code/tika/TikaRestClient.php

<?php

use GuzzleHttp\Client;
use GuzzleHttp\Exception\RequestException;

class TikaRestClient extends Client {

	public function __construct($url) {
		parent::__construct(array(
			'base_url' => $url
		));
	}

	/**
	 * Detect if the service is available
	 *
	 * @return bool
	 */
	public function isAvailable() {
		try {
			return $this
				->get()
				->getStatusCode() == 200;
		} catch (RequestException $ex) {
			return false;
		}
	}

	/**
	 * Get version code
	 *
	 * @return float
	 */
	public function getVersion() {
		$response = $this->get('version');
		// Parse output
		if($response->getStatusCode() == 200 &&
			preg_match('/Apache Tika (?<version>[\.\d]+)/', $response->getBody()->getContents(), $matches)
		) {
			return (float)$matches['version'];
		}

		return 0.0;
	}

	protected $mimes = array();

	/**
	 * Gets supported mime data. May include aliased mime types.
	 *
	 * @return array
	 */
	public function getSupportedMimes() {
		if($this->mimes) return $this->mimes;

		$response = $this->get(
			'mime-types',
			array(
				'headers' => array("Accept" => "application/json")
			)
		);
		return $this->mimes = $response->json();
	}

	/**
	 * Extract text content from a given file
	 *
	 * @param string $file Full filesystem path to a file to post
	 * @return string Content of the file extracted as plain text
	 */
	public function tika($file) {
		$response = $this->put(
			'tika',
			array(
				'body' => file_get_contents($file),
				'headers' => array("Accept" => "text/plain")
			)
		);
		return $response->getBody()->getContents();
	}

}