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<?php
/*
 * Copyright 2014 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/**
 * Curl based implementation of Google_IO.
 *
 * @author Stuart Langley <slangley@google.com>
 */

if (!class_exists('UDP_Google_Client')) {
  require_once dirname(__FILE__) . '/../autoload.php';
}

class UDP_Google_IO_Curl extends UDP_Google_IO_Abstract
{
  // cURL hex representation of version 7.30.0
  const NO_QUIRK_VERSION = 0x071E00;

  private $options = array();

  public function __construct(UDP_Google_Client $client)
  {
    if (!extension_loaded('curl')) {
      $error = 'The cURL IO handler requires the cURL extension to be enabled';
      $client->getLogger()->critical($error);
      throw new UDP_Google_IO_Exception($error);
    }

    parent::__construct($client);
  }

  /**
   * Execute an HTTP Request
   *
   * @param Google_Http_Request $request the http request to be executed
   * @return array containing response headers, body, and http code
   * @throws UDP_Google_IO_Exception on curl or IO error
   */
  public function executeRequest(UDP_Google_Http_Request $request)
  {
    $curl = curl_init();

    if ($request->getPostBody()) {
      curl_setopt($curl, CURLOPT_POSTFIELDS, $request->getPostBody());
    }

    $requestHeaders = $request->getRequestHeaders();
    if ($requestHeaders && is_array($requestHeaders)) {
      $curlHeaders = array();
      foreach ($requestHeaders as $k => $v) {
        $curlHeaders[] = "$k: $v";
      }
      curl_setopt($curl, CURLOPT_HTTPHEADER, $curlHeaders);
    }
    curl_setopt($curl, CURLOPT_URL, $request->getUrl());

    curl_setopt($curl, CURLOPT_CUSTOMREQUEST, $request->getRequestMethod());
    curl_setopt($curl, CURLOPT_USERAGENT, $request->getUserAgent());

    curl_setopt($curl, CURLOPT_FOLLOWLOCATION, false);
    curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, true);
    // 1 is CURL_SSLVERSION_TLSv1, which is not always defined in PHP.
// UpdraftPlus patch
// The SDK leaves this on the default setting in later releases
//     curl_setopt($curl, CURLOPT_SSLVERSION, 1);
    curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($curl, CURLOPT_HEADER, true);

    if ($request->canGzip()) {
      curl_setopt($curl, CURLOPT_ENCODING, 'gzip,deflate');
    }
    
    $options = $this->client->getClassConfig('UDP_Google_IO_Curl', 'options');
    if (is_array($options)) {
      $this->setOptions($options);
    }
    
    foreach ($this->options as $key => $var) {
      curl_setopt($curl, $key, $var);
    }

    if (!isset($this->options[CURLOPT_CAINFO])) {
      curl_setopt($curl, CURLOPT_CAINFO, dirname(__FILE__) . '/cacerts.pem');
    }

    $this->client->getLogger()->debug(
        'cURL request',
        array(
            'url' => $request->getUrl(),
            'method' => $request->getRequestMethod(),
            'headers' => $requestHeaders,
            'body' => $request->getPostBody()
        )
    );

    $response = curl_exec($curl);
    if ($response === false) {
      $error = curl_error($curl);
      $code = curl_errno($curl);
      $map = $this->client->getClassConfig('UDP_Google_IO_Exception', 'retry_map');

      $this->client->getLogger()->error('cURL ' . $error);
      throw new UDP_Google_IO_Exception($error, $code, null, $map);
    }
    $headerSize = curl_getinfo($curl, CURLINFO_HEADER_SIZE);

    list($responseHeaders, $responseBody) = $this->parseHttpResponse($response, $headerSize);
    $responseCode = curl_getinfo($curl, CURLINFO_HTTP_CODE);

    $this->client->getLogger()->debug(
        'cURL response',
        array(
            'code' => $responseCode,
            'headers' => $responseHeaders,
            'body' => $responseBody,
        )
    );

    return array($responseBody, $responseHeaders, $responseCode);
  }

  /**
   * Set options that update the transport implementation's behavior.
   * @param $options
   */
  public function setOptions($options)
  {
    $this->options = $options + $this->options;
  }

  /**
   * Set the maximum request time in seconds.
   * @param $timeout in seconds
   */
  public function setTimeout($timeout)
  {
    // Since this timeout is really for putting a bound on the time
    // we'll set them both to the same. If you need to specify a longer
    // CURLOPT_TIMEOUT, or a higher CONNECTTIMEOUT, the best thing to
    // do is use the setOptions method for the values individually.
    $this->options[CURLOPT_CONNECTTIMEOUT] = $timeout;
    $this->options[CURLOPT_TIMEOUT] = $timeout;
  }

  /**
   * Get the maximum request time in seconds.
   * @return timeout in seconds
   */
  public function getTimeout()
  {
    return $this->options[CURLOPT_TIMEOUT];
  }

  /**
   * Test for the presence of a cURL header processing bug
   *
   * {@inheritDoc}
   *
   * @return boolean
   */
  protected function needsQuirk()
  {
    $ver = curl_version();
    $versionNum = $ver['version_number'];
    return $versionNum < UDP_Google_IO_Curl::NO_QUIRK_VERSION;
  }
}

Filemanager

Name Type Size Permission Actions
Abstract.php File 10.67 KB 0644
Curl.php File 5.34 KB 0644
Exception.php File 1.8 KB 0644
Stream.php File 7.83 KB 0644
cacerts.pem File 131.7 KB 0644