1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
<?php
/**
* @link http://www.yiiframework.com/
* @copyright Copyright (c) 2008 Yii Software LLC
* @license http://www.yiiframework.com/license/
*/
namespace yii\web;
use Yii;
use yii\base\Action;
use yii\base\ActionFilter;
/**
* AccessControl provides simple access control based on a set of rules.
*
* AccessControl is an action filter. It will check its [[rules]] to find
* the first rule that matches the current context variables (such as user IP address, user role).
* The matching rule will dictate whether to allow or deny the access to the requested controller
* action. If no rule matches, the access will be denied.
*
* To use AccessControl, declare it in the `behaviors()` method of your controller class.
* For example, the following declarations will allow authenticated users to access the "create"
* and "update" actions and deny all other users from accessing these two actions.
*
* ~~~
* public function behaviors()
* {
* return [
* 'access' => [
* 'class' => \yii\web\AccessControl::className(),
* 'only' => ['create', 'update'],
* 'rules' => [
* // deny all POST requests
* [
* 'allow' => false,
* 'verbs' => ['POST']
* ],
* // allow authenticated users
* [
* 'allow' => true,
* 'roles' => ['@'],
* ],
* // everything else is denied
* ),
* ),
* );
* }
* ~~~
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @since 2.0
*/
class AccessControl extends ActionFilter
{
/**
* @var callback a callback that will be called if the access should be denied
* to the current user. If not set, [[denyAccess()]] will be called.
*
* The signature of the callback should be as follows:
*
* ~~~
* function ($rule, $action)
* ~~~
*
* where `$rule` is this rule, and `$action` is the current [[Action|action]] object.
*/
public $denyCallback;
/**
* @var array the default configuration of access rules. Individual rule configurations
* specified via [[rules]] will take precedence when the same property of the rule is configured.
*/
public $ruleConfig = ['class' => 'yii\web\AccessRule'];
/**
* @var array a list of access rule objects or configuration arrays for creating the rule objects.
* If a rule is specified via a configuration array, it will be merged with [[ruleConfig]] first
* before it is used for creating the rule object.
* @see ruleConfig
*/
public $rules = [];
/**
* Initializes the [[rules]] array by instantiating rule objects from configurations.
*/
public function init()
{
parent::init();
foreach ($this->rules as $i => $rule) {
if (is_array($rule)) {
$this->rules[$i] = Yii::createObject(array_merge($this->ruleConfig, $rule));
}
}
}
/**
* This method is invoked right before an action is to be executed (after all possible filters.)
* You may override this method to do last-minute preparation for the action.
* @param Action $action the action to be executed.
* @return boolean whether the action should continue to be executed.
*/
public function beforeAction($action)
{
$user = Yii::$app->getUser();
$request = Yii::$app->getRequest();
/** @var $rule AccessRule */
foreach ($this->rules as $rule) {
if ($allow = $rule->allows($action, $user, $request)) {
return true;
} elseif ($allow === false) {
if (isset($rule->denyCallback)) {
call_user_func($rule->denyCallback, $rule);
} elseif (isset($this->denyCallback)) {
call_user_func($this->denyCallback, $rule);
} else {
$this->denyAccess($user);
}
return false;
}
}
if (isset($this->denyCallback)) {
call_user_func($this->denyCallback, $rule);
}
else {
$this->denyAccess($user);
}
return false;
}
/**
* Denies the access of the user.
* The default implementation will redirect the user to the login page if he is a guest;
* if the user is already logged, a 403 HTTP exception will be thrown.
* @param User $user the current user
* @throws HttpException if the user is already logged in.
*/
protected function denyAccess($user)
{
if ($user->getIsGuest()) {
$user->loginRequired();
} else {
throw new HttpException(403, Yii::t('yii', 'You are not allowed to perform this action.'));
}
}
}