Ticket #11499: 11499-curlforce.php

<?php
/*
Plugin Name: CURLForce
Plugin URI: http://core.trac.wordpress.org/ticket/11499 
Description: To test CURL, CURL needs to be enforced. Done when activated.
Version: 0.1
Author: hakre
Author URI: http://codex.wordpress.org/User:Hakre
*/
/*  Copyright 2009 by the authors

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
*/

/**
 * curlforce plugin class
 * 
 */
class pluginCurlforce
{
        /**
         * constructor
         * 
         * @return this
         */
        function pluginCurlforce() {
                // configure to use curl only
                add_filter('use_http_extension_transport', array($this, 'transport_disable'), 10, 2);
                add_filter('use_curl_transport',           array($this, 'transport_enable'),  10, 2);
                add_filter('use_streams_transport',        array($this, 'transport_disable'), 10, 2);
                add_filter('use_fopen_transport',          array($this, 'transport_disable'), 10, 2);
                add_filter('use_fsockopen_transport',      array($this, 'transport_disable'), 10, 2);
                
                // validate that only curl is used              
                add_action('http_transport_get_debug', array($this, 'http_transport_get_debug'), 10, 3);                        
        }
        
        function transport_disable($flag, $args)
        {
                return false;
        }
        
        function transport_enable($flag, $args)
        {
                return true;
        }
        
        /**
         * http_transport_get_debug
         * 
         * @param array $working_transport     references to objects
         * @param array $blocking_transport    references to objects
         * @param array $nonblocking_transport references to objects
         * @return void
         * @-wp-action http_transport_get_debug
         */
        function http_transport_get_debug($working_transport, $blocking_transport, $nonblocking_transport)
        {        
                do
                {
                        if ( get_class($working_transport['curl']) <> 'WP_Http_Curl') 
                                continue;
                                
                        if ( get_class($blocking_transport[0]) <> 'WP_Http_Curl')
                                continue;
                                
                        if ( get_class($nonblocking_transport[0]) <> 'WP_Http_Curl')
                                continue;
                                
                        return; // all ok, all CURL     
                        
                } while(false);
                
                throw new Exception('Not enforced on CURL. Check your testcase.');
                
                print 'PHP 4 is outdated.'; 
                die();
                
        }
}

$opluginCurlforce = new pluginCurlforce();