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   1  <?php
   2  
   3  use dokuwiki\Utf8\Clean;
   4  use dokuwiki\Utf8\PhpString;
   5  
   6  /**
   7   * A simple renderer that allows downloading of code and file snippets
   8   *
   9   * @author Andreas Gohr <andi@splitbrain.org>
  10   */
  11  class Doku_Renderer_code extends Doku_Renderer
  12  {
  13      protected $_codeblock = 0;
  14  
  15      /**
  16       * Send the wanted code block to the browser
  17       *
  18       * When the correct block was found it exits the script.
  19       *
  20       * @param string $text
  21       * @param string $language
  22       * @param string $filename
  23       */
  24      public function code($text, $language = null, $filename = '')
  25      {
  26          global $INPUT;
  27          if (!$language) $language = 'txt';
  28          $language = preg_replace(PREG_PATTERN_VALID_LANGUAGE, '', $language);
  29          if (!$filename) $filename = 'snippet.' . $language;
  30          $filename = PhpString::basename($filename);
  31          $filename = Clean::stripspecials($filename, '_');
  32  
  33          // send CRLF to Windows clients
  34          if (strpos($INPUT->server->str('HTTP_USER_AGENT'), 'Windows') !== false) {
  35              $text = str_replace("\n", "\r\n", $text);
  36          }
  37  
  38          if ($this->_codeblock == $INPUT->str('codeblock')) {
  39              header("Content-Type: text/plain; charset=utf-8");
  40              header("Content-Disposition: attachment; filename=$filename");
  41              header("X-Robots-Tag: noindex");
  42              echo trim($text, "\r\n");
  43              exit;
  44          }
  45  
  46          $this->_codeblock++;
  47      }
  48  
  49      /**
  50       * Wraps around code()
  51       *
  52       * @param string $text
  53       * @param string $language
  54       * @param string $filename
  55       */
  56      public function file($text, $language = null, $filename = '')
  57      {
  58          $this->code($text, $language, $filename);
  59      }
  60  
  61      /**
  62       * This should never be reached, if it is send a 404
  63       */
  64      public function document_end()
  65      {
  66          http_status(404);
  67          echo '404 - Not found';
  68          exit;
  69      }
  70  
  71      /**
  72       * Return the format of the renderer
  73       *
  74       * @returns string 'code'
  75       */
  76      public function getFormat()
  77      {
  78          return 'code';
  79      }
  80  }