function search_file_attachments_extract_tika in Search File Attachments 7

Extract file content with Apache Tika.

Parameters

object $file: The file object.

Return value

string The extracted content.

Throws

Exception

1 call to search_file_attachments_extract_tika()

search_file_attachments_get_file_content in ./search_file_attachments.inc

Extract the content of the given file.

File

./search_file_attachments.inc, line 183

Heler functions, to hold the .module file clean and smart.

Code

function search_file_attachments_extract_tika($file) {
  $filepath = file_create_url($file->uri);
  $tika_path = realpath(variable_get('search_file_attachments_tika_path', ''));
  $tika = realpath($tika_path . '/' . variable_get('search_file_attachments_tika_jar', ''));
  if (!$tika || !is_file($tika)) {
    throw new Exception(t('Invalid path or filename for tika application jar.'));
  }

  // UTF-8 multibyte characters will be stripped by escapeshellargs().
  // So temporarily set the locale to UTF-8 so that the filepath remain valid.
  $backup_locale = setlocale(LC_CTYPE, '0');
  setlocale(LC_CTYPE, 'en_US.UTF-8');
  $param = '';
  $java_path = search_file_attachments_java_path();
  if ($file->filemime != 'audio/mpeg') {
    $param = ' -Dfile.encoding=UTF8 -cp ' . escapeshellarg($tika_path);
  }
  if (DIRECTORY_SEPARATOR == '\\') {

    // If we on windows, use an other methode to escape the file path strings,
    // to prevent problems with paths that contains spaces. Because the
    // PHP escapeshellarg() function handle these correct.
    $cmd = $java_path . $param . ' -jar "' . str_replace('"', '\\"', $tika) . '" -t "' . str_replace('"', '\\"', $filepath) . '"';
  }
  else {
    $cmd = $java_path . $param . ' -jar ' . escapeshellarg($tika) . ' -t ' . escapeshellarg($filepath);
    if (strpos(ini_get('extension_dir'), 'MAMP/')) {
      $cmd = 'export DYLD_LIBRARY_PATH=""; ' . $cmd;
    }
  }

  // Support utf-8 commands:
  // http://www.php.net/manual/pt_BR/function.shell-exec.php#85095
  $cmd = "LANG=en_US.utf-8; {$cmd}";

  // Restore the locale.
  setlocale(LC_CTYPE, $backup_locale);

  // Debug print.
  if (variable_get('search_file_attachments_debug', FALSE)) {
    $result = shell_exec($cmd . ' 2>&1');
    watchdog('search_file_attachments', '<p><strong>Tika Command:</strong> <code>%command</code></p><br /> <p><strong>Result:</strong> %result</p>', array(
      '%command' => $cmd,
      '%result' => $result,
    ));

    // Empty the result, if it contains an error message, so that the error
    // is not in the index.
    if (strpos($result, 'Exception in thread') !== FALSE) {
      $result = FALSE;
    }
    return $result;
  }
  return shell_exec($cmd);
}