anti anti-link

config.yaml

name: cnbeta1
version: 1

handle:
- rewrite:  if ( path ~ "^(.*)\.png$"  ) goto "img.php?url=$1.png"
- rewrite:  if ( path ~ "^(.*)\.gif$"  ) goto "img.php?url=$1.gif"
- rewrite:  if ( path ~ "^(.*)\.jpg$"  ) goto "img.php?url=$1.jpg"
- rewrite:  if ( path ~ "^(.*)\.jpeg$"  ) goto "img.php?url=$1.jpeg"

img.php

<?php
$domain = 'img';

$url = 'http://static.cnbetacdn.com' . $_GET['url'];

$ext = pathinfo($url, PATHINFO_EXTENSION);
$filename = md5($url).'.'.$ext;
switch($ext) {
    case "gif": $ctype="image/gif"; break;
    case "png": $ctype="image/png"; break;
    case "jpeg":
    case "jpg": $ctype="image/jpeg"; break;
    default:
}


$s = new SaeStorage();

if ($s->fileExists($domain, $filename)) {
    $img = $s->read($domain, $filename);
    header('Content-type: ' . $ctype);
    echo $img;
} else {
    $f = new SaeFetchurl();
    $content = $f->fetch($url);
    
    if($f->errno() != 0) die($f->errmsg());
    
    $s->write($domain, $filename, $content);
    
    header('Content-type: ' . $ctype);
    echo $content;
}