Building Android Apps with HTML, CSS, and JavaScript, 2nd Edition

Creating a Dynamic Manifest File

Now that you’re comfortable with how the offline app cache works, let’s apply it to the Kilo example we’ve been working on. Kilo consists of quite a few files and manually listing them all in a manifest file would be a pain. Plus, a single typo would invalidate the entire manifest file and prevent the application from working offline.

To address this issue, we’re going to write a little PHP file that reads the contents of the application directory (and subdirectories) and creates the file list for us. Create a new file in your Kilo directory named manifest.php and add the following code:

<?php
  header('Content-Type: text/cache-manifest');
  echo "CACHE MANIFEST\n";

  $dir = new RecursiveDirectoryIterator(".");
  foreach(new RecursiveIteratorIterator($dir) as $file) {
    if ($file->IsFile() &&
        $file->getFilename() != "manifest.php" &&
        substr($file->getFilename(), 0, 1) != "." &&
        !strpos($file, DIRECTORY_SEPARATOR . '.')) { $file_name = $file->getPathName(); if (DIRECTORY_SEPARATOR ...