105 lines
4.5 KiB
PHP
105 lines
4.5 KiB
PHP
<?php
|
|
// Copyright 2004-2008 Facebook. All Rights Reserved.
|
|
//
|
|
// +---------------------------------------------------------------------------+
|
|
// | Facebook Platform PHP5 client |
|
|
// +---------------------------------------------------------------------------+
|
|
// | Copyright (c) 2007 Facebook, Inc. |
|
|
// | All rights reserved. |
|
|
// | |
|
|
// | Redistribution and use in source and binary forms, with or without |
|
|
// | modification, are permitted provided that the following conditions |
|
|
// | are met: |
|
|
// | |
|
|
// | 1. Redistributions of source code must retain the above copyright |
|
|
// | notice, this list of conditions and the following disclaimer. |
|
|
// | 2. Redistributions in binary form must reproduce the above copyright |
|
|
// | notice, this list of conditions and the following disclaimer in the |
|
|
// | documentation and/or other materials provided with the distribution. |
|
|
// | |
|
|
// | THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR |
|
|
// | IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
|
|
// | OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. |
|
|
// | IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, |
|
|
// | INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
|
|
// | NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
|
|
// | DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
|
|
// | THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
|
|
// | (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
|
|
// | THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
|
|
// +---------------------------------------------------------------------------+
|
|
// | For help with this library, contact developers-help@facebook.com |
|
|
// +---------------------------------------------------------------------------+
|
|
//
|
|
|
|
/**
|
|
* This class extends and modifies the "Facebook" class to better
|
|
* suit desktop apps.
|
|
*/
|
|
class FacebookDesktop extends Facebook {
|
|
// the application secret, which differs from the session secret
|
|
public $app_secret;
|
|
public $verify_sig;
|
|
|
|
public function __construct($api_key, $secret) {
|
|
$this->app_secret = $secret;
|
|
$this->verify_sig = false;
|
|
parent::__construct($api_key, $secret);
|
|
}
|
|
|
|
public function do_get_session($auth_token) {
|
|
$this->api_client->secret = $this->app_secret;
|
|
$this->api_client->session_key = null;
|
|
$session_info = parent::do_get_session($auth_token);
|
|
if (!empty($session_info['secret'])) {
|
|
// store the session secret
|
|
$this->set_session_secret($session_info['secret']);
|
|
}
|
|
return $session_info;
|
|
}
|
|
|
|
public function set_session_secret($session_secret) {
|
|
$this->secret = $session_secret;
|
|
$this->api_client->secret = $session_secret;
|
|
}
|
|
|
|
public function require_login() {
|
|
if ($this->get_loggedin_user()) {
|
|
try {
|
|
// try a session-based API call to ensure that we have the correct
|
|
// session secret
|
|
$user = $this->api_client->users_getLoggedInUser();
|
|
|
|
// now that we have a valid session secret, verify the signature
|
|
$this->verify_sig = true;
|
|
if ($this->validate_fb_params(false)) {
|
|
return $user;
|
|
} else {
|
|
// validation failed
|
|
return null;
|
|
}
|
|
} catch (FacebookRestClientException $ex) {
|
|
if (isset($_GET['auth_token'])) {
|
|
// if we have an auth_token, use it to establish a session
|
|
$session_info = $this->do_get_session($_GET['auth_token']);
|
|
if ($session_info) {
|
|
return $session_info['uid'];
|
|
}
|
|
}
|
|
}
|
|
}
|
|
// if we get here, we need to redirect the user to log in
|
|
$this->redirect($this->get_login_url(self::current_url(), $this->in_fb_canvas()));
|
|
}
|
|
|
|
public function verify_signature($fb_params, $expected_sig) {
|
|
// we don't want to verify the signature until we have a valid
|
|
// session secret
|
|
if ($this->verify_sig) {
|
|
return parent::verify_signature($fb_params, $expected_sig);
|
|
} else {
|
|
return true;
|
|
}
|
|
}
|
|
}
|