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