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Slim/Middleware/ContentTypes.php 4.98 KB
219b8036   luigser   DEEP
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  <?php
  /**
   * Slim - a micro PHP 5 framework
   *
   * @author      Josh Lockhart <info@slimframework.com>
   * @copyright   2011 Josh Lockhart
   * @link        http://www.slimframework.com
   * @license     http://www.slimframework.com/license
   * @version     2.6.1
   * @package     Slim
   *
   * MIT LICENSE
   *
   * Permission is hereby granted, free of charge, to any person obtaining
   * a copy of this software and associated documentation files (the
   * "Software"), to deal in the Software without restriction, including
   * without limitation the rights to use, copy, modify, merge, publish,
   * distribute, sublicense, and/or sell copies of the Software, and to
   * permit persons to whom the Software is furnished to do so, subject to
   * the following conditions:
   *
   * The above copyright notice and this permission notice shall be
   * included in all copies or substantial portions of the Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
   * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
   * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
   * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
   * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
   * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
   * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
   */
  namespace Slim\Middleware;
  
   /**
    * Content Types
    *
    * This is middleware for a Slim application that intercepts
    * the HTTP request body and parses it into the appropriate
    * PHP data structure if possible; else it returns the HTTP
    * request body unchanged. This is particularly useful
    * for preparing the HTTP request body for an XML or JSON API.
    *
    * @package    Slim
    * @author     Josh Lockhart
    * @since      1.6.0
    */
  class ContentTypes extends \Slim\Middleware
  {
      /**
       * @var array
       */
      protected $contentTypes;
  
      /**
       * Constructor
       * @param array $settings
       */
      public function __construct($settings = array())
      {
          $defaults = array(
              'application/json' => array($this, 'parseJson'),
              'application/xml' => array($this, 'parseXml'),
              'text/xml' => array($this, 'parseXml'),
              'text/csv' => array($this, 'parseCsv')
          );
          $this->contentTypes = array_merge($defaults, $settings);
      }
  
      /**
       * Call
       */
      public function call()
      {
          $mediaType = $this->app->request()->getMediaType();
          if ($mediaType) {
              $env = $this->app->environment();
              $env['slim.input_original'] = $env['slim.input'];
              $env['slim.input'] = $this->parse($env['slim.input'], $mediaType);
          }
          $this->next->call();
      }
  
      /**
       * Parse input
       *
       * This method will attempt to parse the request body
       * based on its content type if available.
       *
       * @param  string $input
       * @param  string $contentType
       * @return mixed
       */
      protected function parse ($input, $contentType)
      {
          if (isset($this->contentTypes[$contentType]) && is_callable($this->contentTypes[$contentType])) {
              $result = call_user_func($this->contentTypes[$contentType], $input);
              if ($result) {
                  return $result;
              }
          }
  
          return $input;
      }
  
      /**
       * Parse JSON
       *
       * This method converts the raw JSON input
       * into an associative array.
       *
       * @param  string       $input
       * @return array|string
       */
      protected function parseJson($input)
      {
          if (function_exists('json_decode')) {
              $result = json_decode($input, true);
              if(json_last_error() === JSON_ERROR_NONE) {
                  return $result;
              }
          }
      }
  
      /**
       * Parse XML
       *
       * This method creates a SimpleXMLElement
       * based upon the XML input. If the SimpleXML
       * extension is not available, the raw input
       * will be returned unchanged.
       *
       * @param  string                  $input
       * @return \SimpleXMLElement|string
       */
      protected function parseXml($input)
      {
          if (class_exists('SimpleXMLElement')) {
              try {
                  $backup = libxml_disable_entity_loader(true);
                  $result = new \SimpleXMLElement($input);
                  libxml_disable_entity_loader($backup);
                  return $result;
              } catch (\Exception $e) {
                  // Do nothing
              }
          }
  
          return $input;
      }
  
      /**
       * Parse CSV
       *
       * This method parses CSV content into a numeric array
       * containing an array of data for each CSV line.
       *
       * @param  string $input
       * @return array
       */
      protected function parseCsv($input)
      {
          $temp = fopen('php://memory', 'rw');
          fwrite($temp, $input);
          fseek($temp, 0);
          $res = array();
          while (($data = fgetcsv($temp)) !== false) {
              $res[] = $data;
          }
          fclose($temp);
  
          return $res;
      }
  }