xml_forms.module

<?php

/**
 * @file
 * XML Forms base module.
 */

/**
 * Implements Hook Menu.
 *
 * @return array
 *   Array of menu items.
 */
function xml_forms_menu() {
  $items['schema/%'] = array(
    'title' => 'schema',
    'description' => 'schema',
    'page callback' => 'xml_forms_get_schema',
    'page arguments' => array(1),
    'access arguments' => array('access content'),
    'type' => MENU_CALLBACK,
  );
  return $items;
}

/**
 * Get the schema if it exists.
 *
 * @param string $filename
 *   XSD to grab the schema from.
 */
function xml_forms_get_schema($filename) {
  $path = drupal_get_path('module', 'xml_forms') . '/schema';
  $full_filename = "$path/$filename";
  if (file_exists($full_filename)) {
    drupal_goto($full_filename);
  }
  else {
    drupal_not_found();
  }
}