Client.php

1. 8.x drupal/core/vendor/guzzle/http/Guzzle/Http/Client.php
2. 8.x drupal/core/vendor/easyrdf/easyrdf/lib/EasyRdf/Http/Client.php
3. 8.x drupal/core/vendor/easyrdf/easyrdf/lib/EasyRdf/Sparql/Client.php
4. 8.x drupal/core/vendor/symfony/http-kernel/Symfony/Component/HttpKernel/Client.php

<?php

/**
 * EasyRdf
 *
 * LICENSE
 *
 * Copyright (c) 2009-2012 Nicholas J Humfrey.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 * 3. The name of the author 'Nicholas J Humfrey" may be used to endorse or
 *    promote products derived from this software without specific prior
 *    written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 *
 * @package    EasyRdf
 * @copyright  Copyright (c) 2009-2012 Nicholas J Humfrey
 * @license    http://www.opensource.org/licenses/bsd-license.php
 * @version    $Id$
 */

/**
 * Class for making SPARQL queries using the SPARQL 1.1 Protocol
 *
 * @package    EasyRdf
 * @copyright  Copyright (c) 2009-2012 Nicholas J Humfrey
 * @license    http://www.opensource.org/licenses/bsd-license.php
 */
class EasyRdf_Sparql_Client {

  /** The address of the SPARQL Endpoint */
  private $uri = null;

  /** Configuration settings */
  private $config = array();

  /** Create a new SPARQL endpoint client
   *
   * @param string $uri The address of the SPARQL Endpoint
   */
  public function __construct($uri) {
    $this->uri = $uri;
  }

  /** Get the URI of the SPARQL endpoint
   *
   * @return string The URI of the SPARQL endpoint
   */
  public function getUri() {
    return $this->uri;
  }

  /** Make a query to the SPARQL endpoint
   *
   * SELECT and ASK queries will return an object of type
   * EasyRdf_Sparql_Result.
   *
   * CONSTRUCT and DESCRIBE queries will return an object
   * of type EasyRdf_Graph.
   *
   * @param string $query The query string to be executed
   * @return object EasyRdf_Sparql_Result|EasyRdf_Graph Result of the query.
   */
  public function query($query) {

    # Add namespaces to the queryString
    $prefixes = '';
    foreach (EasyRdf_Namespace::namespaces() as $prefix => $uri) {
      if (strpos($query, "{$prefix}:") !== false and strpos($query, "PREFIX {$prefix}:") === false) {
        $prefixes .= "PREFIX {$prefix}: <{$uri}>\n";
      }
    }
    $client = EasyRdf_Http::getDefaultHttpClient();
    $client
      ->resetParameters();
    $client
      ->setUri($this->uri);
    $client
      ->setMethod('GET');
    $accept = EasyRdf_Format::getHttpAcceptHeader(array(
      'application/sparql-results+json' => 1.0,
      'application/sparql-results+xml' => 0.8,
    ));
    $client
      ->setHeaders('Accept', $accept);
    $client
      ->setParameterGet('query', $prefixes . $query);
    $response = $client
      ->request();
    if ($response
      ->isSuccessful()) {
      list($type, $params) = EasyRdf_Utils::parseMimeType($response
        ->getHeader('Content-Type'));
      if (strpos($type, 'application/sparql-results') === 0) {
        return new EasyRdf_Sparql_Result($response
          ->getBody(), $type);
      }
      else {
        return new EasyRdf_Graph($this->uri, $response
          ->getBody(), $type);
      }
    }
    else {
      throw new EasyRdf_Exception("HTTP request for SPARQL query failed: " . $response
        ->getBody());
    }
  }

  /** Magic method to return URI of the SPARQL endpoint when casted to string
   *
   * @return string The URI of the SPARQL endpoint
   */
  public function __toString() {
    return $this->uri == null ? '' : $this->uri;
  }

}