94 lines
2.8 KiB
PHP
94 lines
2.8 KiB
PHP
|
<?php
|
||
|
|
/**
|
||
|
|
* Copyright 2011 Facebook, Inc.
|
||
|
|
*
|
||
|
|
* Licensed under the Apache License, Version 2.0 (the "License"); you may
|
||
|
|
* not use this file except in compliance with the License. You may obtain
|
||
|
|
* a copy of the License at
|
||
|
|
*
|
||
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
||
|
|
*
|
||
|
|
* Unless required by applicable law or agreed to in writing, software
|
||
|
|
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
||
|
|
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
||
|
|
* License for the specific language governing permissions and limitations
|
||
|
|
* under the License.
|
||
|
|
*/
|
||
|
|
|
||
|
|
require_once "base_facebook.php";
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Extends the BaseFacebook class with the intent of using
|
||
|
|
* PHP sessions to store user ids and access tokens.
|
||
|
|
*/
|
||
|
|
class Facebook extends BaseFacebook
|
||
|
|
{
|
||
|
|
/**
|
||
|
|
* Identical to the parent constructor, except that
|
||
|
|
* we start a PHP session to store the user ID and
|
||
|
|
* access token if during the course of execution
|
||
|
|
* we discover them.
|
||
|
|
*
|
||
|
|
* @param Array $config the application configuration.
|
||
|
|
* @see BaseFacebook::__construct in facebook.php
|
||
|
|
*/
|
||
|
|
public function __construct($config) {
|
||
|
|
if (!session_id()) {
|
||
|
|
session_start();
|
||
|
|
}
|
||
|
|
parent::__construct($config);
|
||
|
|
}
|
||
|
|
|
||
|
|
protected static $kSupportedKeys =
|
||
|
|
array('state', 'code', 'access_token', 'user_id');
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Provides the implementations of the inherited abstract
|
||
|
|
* methods. The implementation uses PHP sessions to maintain
|
||
|
|
* a store for authorization codes, user ids, CSRF states, and
|
||
|
|
* access tokens.
|
||
|
|
*/
|
||
|
|
protected function setPersistentData($key, $value) {
|
||
|
|
if (!in_array($key, self::$kSupportedKeys)) {
|
||
|
|
self::errorLog('Unsupported key passed to setPersistentData.');
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
$session_var_name = $this->constructSessionVariableName($key);
|
||
|
|
$_SESSION[$session_var_name] = $value;
|
||
|
|
}
|
||
|
|
|
||
|
|
protected function getPersistentData($key, $default = false) {
|
||
|
|
if (!in_array($key, self::$kSupportedKeys)) {
|
||
|
|
self::errorLog('Unsupported key passed to getPersistentData.');
|
||
|
|
return $default;
|
||
|
|
}
|
||
|
|
|
||
|
|
$session_var_name = $this->constructSessionVariableName($key);
|
||
|
|
return isset($_SESSION[$session_var_name]) ?
|
||
|
|
$_SESSION[$session_var_name] : $default;
|
||
|
|
}
|
||
|
|
|
||
|
|
protected function clearPersistentData($key) {
|
||
|
|
if (!in_array($key, self::$kSupportedKeys)) {
|
||
|
|
self::errorLog('Unsupported key passed to clearPersistentData.');
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
$session_var_name = $this->constructSessionVariableName($key);
|
||
|
|
unset($_SESSION[$session_var_name]);
|
||
|
|
}
|
||
|
|
|
||
|
|
protected function clearAllPersistentData() {
|
||
|
|
foreach (self::$kSupportedKeys as $key) {
|
||
|
|
$this->clearPersistentData($key);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
protected function constructSessionVariableName($key) {
|
||
|
|
return implode('_', array('fb',
|
||
|
|
$this->getAppId(),
|
||
|
|
$key));
|
||
|
|
}
|
||
|
|
}
|