Curl.php in Bibliography Module 7.2

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modules/CiteProc/Github/HttpClient/Curl.php

<?php

/**
 * Performs requests on GitHub API. API documentation should be self-explanatory.
 *
 * @author    Thibault Duplessis <thibault.duplessis at gmail dot com>
 * @license   MIT License
 */
class Github_HttpClient_Curl extends Github_HttpClient {

  /**
   * Send a request to the server, receive a response
   *
   * @param  string   $path          Request url
   * @param  array    $parameters    Parameters
   * @param  string   $httpMethod    HTTP method to use
   * @param  array    $options       Request options
   *
   * @return string   HTTP response
   */
  public function doRequest($url, array $parameters = array(), $httpMethod = 'GET', array $options) {
    $curlOptions = array();
    if ($options['login']) {
      switch ($options['auth_method']) {
        case Github_Client::AUTH_HTTP_PASSWORD:
          $curlOptions += array(
            CURLOPT_USERPWD => $options['login'] . ':' . $options['secret'],
          );
          break;
        case Github_Client::AUTH_HTTP_TOKEN:
          $curlOptions += array(
            CURLOPT_USERPWD => $options['login'] . '/token:' . $options['secret'],
          );
          break;
        case Github_Client::AUTH_URL_TOKEN:
        default:
          $parameters = array_merge(array(
            'login' => $options['login'],
            'token' => $options['secret'],
          ), $parameters);
          break;
      }
    }
    if (!empty($parameters)) {
      $queryString = utf8_encode(http_build_query($parameters, '', '&'));
      if ('GET' === $httpMethod) {
        $url .= '?' . $queryString;
      }
      else {
        $curlOptions += array(
          CURLOPT_POST => true,
          CURLOPT_POSTFIELDS => $queryString,
        );
      }
    }
    $curlOptions += array(
      CURLOPT_URL => $url,
      CURLOPT_PORT => $options['http_port'],
      CURLOPT_USERAGENT => $options['user_agent'],
      CURLOPT_FOLLOWLOCATION => true,
      CURLOPT_RETURNTRANSFER => true,
      CURLOPT_TIMEOUT => $options['timeout'],
    );
    $response = $this
      ->doCurlCall($curlOptions);
    if (!in_array($response['headers']['http_code'], array(
      0,
      200,
      201,
    ))) {
      throw new Github_HttpClient_Exception(null, (int) $response['headers']['http_code']);
    }
    if ($response['errorNumber'] != '') {
      throw new Github_HttpClient_Exception('error ' . $response['errorNumber']);
    }
    return $response['response'];
  }
  protected function doCurlCall(array $curlOptions) {

    //follow on location problems
    $safe_mode = ini_get('safe_mode');
    $open_basedir = ini_get('open_basedir');
    $curl = curl_init();
    if (empty($open_basedir) && empty($safe_mode)) {
      return $this
        ->doNormalCurlCall($curl, $curlOptions);
    }
    else {
      unset($curlOptions[CURLOPT_FOLLOWLOCATION]);
      $curlOptions[CURLOPT_HEADER] = TRUE;
      return $this
        ->doSafeModeCurlCall($curl, $curlOptions);
    }
    curl_close($go);
    return $syn;
  }
  protected function doNormalCurlCall($curl, array $curlOptions) {
    curl_setopt_array($curl, $curlOptions);
    $response = curl_exec($curl);
    $headers = curl_getinfo($curl);
    $errorNumber = curl_errno($curl);
    $errorMessage = curl_error($curl);
    curl_close($curl);
    return compact('response', 'headers', 'errorNumber', 'errorMessage');
  }

  //follow on location problems workaround
  protected function doSafeModeCurlCall($curl, array $curlOptions) {
    static $curl_loops = 0;
    if ($curl_loops++ > 20) {
      $curl_loops = 0;
      return FALSE;
    }
    curl_setopt_array($curl, $curlOptions);
    $response = curl_exec($curl);
    list($header, $response) = explode("\n\r\n", $response, 2);
    $response = trim($response);
    $headers = curl_getinfo($curl);
    $errorNumber = curl_errno($curl);
    $errorMessage = curl_error($curl);
    $http_code = curl_getinfo($curl, CURLINFO_HTTP_CODE);
    if ($http_code == 301 || $http_code == 302) {
      $matches = array();
      preg_match('/Location:(.*?)\\n/', $header, $matches);
      $url = @parse_url(trim(array_pop($matches)));
      if (!$url) {

        //couldn't process the url to redirect to
        $curl_loops = 0;
        curl_close($curl);
        return compact('response', 'headers', 'errorNumber', 'errorMessage');
      }
      $last_url = parse_url(curl_getinfo($curl, CURLINFO_EFFECTIVE_URL));
      if (!$url['scheme']) {
        $url['scheme'] = $last_url['scheme'];
      }
      if (!$url['host']) {
        $url['host'] = $last_url['host'];
      }
      if (!$url['path']) {
        $url['path'] = $last_url['path'];
      }
      $new_url = $url['scheme'] . '://' . $url['host'] . $url['path'] . ($url['query'] ? '?' . $url['query'] : '');
      $curlOptions['CURLOPT_URL'] = $new_url;
      return $this
        ->doSafeModeCurlCall($curl, $curlOptions);
    }
    else {
      $curl_loops = 0;
      curl_close($curl);
      return compact('response', 'headers', 'errorNumber', 'errorMessage');
    }
  }

}

Classes

Name	Description
Github_HttpClient_Curl	Performs requests on GitHub API. API documentation should be self-explanatory.