On demand, dynamic, invisible remote files fetcher

fetcher.php

<?php

/*
 * This is very useful when you have a broken html with missing files
 * ie: you save an html page but you miss all the resources
 *
 * @author Davide Lattanzio
 * @email info@dualweb.it
 *
 */


/*
 * Put this in your .htaccess
 *
 * <IfModule mod_rewrite.c>
 * RewriteEngine On
 * RewriteBase /
 * RewriteRule ^index\.php$ - [L]
 *
 * # This hack loads the the remote original file if missing
 * # Or fetch it locally the first time it called
 * RewriteCond %{REQUEST_FILENAME} !-f
 * RewriteCond %{REQUEST_FILENAME} !-d
 * RewriteCond %{REQUEST_URI} \.(jpg|gif|png|mp4|m4v|ogv|webm)$  # modify on your needs
 * # RewriteRule ^(.*)$  http://www.domain.tld/$1  [L,QSA]
 * RewriteRule ^(.*)$  /fetcher.php?path=%1  [L,QSA]
 *
 *
 */

$origin = "http://www.domain.tld/";



// Fetch the remote original file
$fileurl = substr($_SERVER['REQUEST_URI'], 1);
$ch = curl_init();
$source = $origin . $fileurl;
curl_setopt($ch, CURLOPT_URL, $source);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
$data = curl_exec($ch);
// get the mime type for the later redirect
$mimetype = curl_getinfo($ch, CURLINFO_CONTENT_TYPE);
curl_close($ch);


// Save in the matching local path
mkdir(dirname($fileurl), 0755, 1);
$file = fopen($fileurl, "w+");
fputs($file, $data);
fclose($file);


// redirect to original for now
header('Location: ' . $source);

// alternatively we can serve the file just saved
// header('Content-type: ' . $mimetype);
// print $data;