HTACCESS - Block everything but specified SEO friendly URL

I haven't found all the answer to my current problem.

Here is the root of the site:

• cache
• img
• display.php
• admin.php

What I need is to block all the direct access of the files and allow only access via url formatted like that:

1 ht*p://sub.domain.com/image/param/size/folder/img.jpg (param, size, folder, img are parameters)

2 ht*p://sub.domain.com/action/param1/param2/ (param1, param2 are parameters)

1 would point to display.php with the correct parameters

2 would point to admin.php with the correct parameters

Every other access must be 404 (at best) or 403

my rules are (the htaccess is in ht*p://sub.domain.com/):

RewriteRule ^image/([^/]+)/([0-9]+)/([^/]+)/([^/]+)\.jpg display.php?param=$1&size=$2&folder=$3&img=$4 [L]
RewriteRule ^action/([^/]+)/([^/]+) admin.php?action=$1&param=$2 [L]

Those rules work as I want to but I am stuck on how to block any access that does not come from those URL!

Also (as a bonus) I would like to be able to use the same htaccess on diferrent web address without开发者_StackOverflow having to change this file.

Thanks in advance

Have you try moving the image out of the public folder and use php to call the image in?

For the PHP files you can use the switch statement (http://www.php.net/switch).

For the admin.php file you can do something like:

$get_action = $_GET['action'];

switch ($get_action) {
    case "edit":
    case "view":
    case "delete":
    case "add":
        //Continue loading the page
        break;
    default:
       header('HTTP/1.1 403 Forbidden');
       die();
}

Note: I don't know how your code looks or works, but you can have an idea base on the code I added.