protected function renewAuthStatus() { $session = Yii::$app->getSession(); $id = $session->getHasSessionId() || $session->getIsActive() ? $session->get($this->idParam) : null; if ($id === null) { $identity = null; } else { /** @var IdentityInterface $class */ $class = $this->identityClass; $identity = $class::findIdentity($id); } $this->setIdentity($identity); if ($this->authTimeout !== null && $identity !== null) { $expire = $session->get($this->authTimeoutParam); if ($expire !== null && $expire < time()) { $this->logout(false); } else { $session->set($this->authTimeoutParam, time() + $this->authTimeout); } } if ($this->enableAutoLogin) { if ($this->getIsGuest()) { $this->loginByCookie(); } elseif ($this->autoRenewCookie) { $this->renewIdentityCookie(); } } }
这一部分先通过session来判断用户，因为用户登录后就已经存在于session中了。然后再判断如果是自动登录，那么就通过cookie信息来登录。
4、通过保存的Cookie信息来登录 loginByCookie
protected function loginByCookie() { $name = $this->identityCookie['name']; $value = Yii::$app->getRequest()->getCookies()->getValue($name); if ($value !== null) { $data = json_decode($value, true); if (count($data) === 3 && isset($data[0], $data[1], $data[2])) { list ($id, $authKey, $duration) = $data; /** @var IdentityInterface $class */ $class = $this->identityClass; $identity = $class::findIdentity($id); if ($identity !== null && $identity->validateAuthKey($authKey)) { if ($this->beforeLogin($identity, true, $duration)) { $this->switchIdentity($identity, $this->autoRenewCookie ? $duration : 0); $ip = Yii::$app->getRequest()->getUserIP(); Yii::info("User '$id' logged in from $ip via cookie.", __METHOD__); $this->afterLogin($identity, true, $duration); } } elseif ($identity !== null) { Yii::warning("Invalid auth key attempted for user '$id': $authKey", __METHOD__); } } } }
先读取cookie值，然后$data = json_decode($value, true);反序列化为数组。
这个从上面的代码可以知道要想实现自动登录，这三个值都必须有值。另外，在User Model中还必须要实现findIdentity、validateAuthKey这两个方法。
登录完成后，还可以再重新设置cookie的有效期，这样便能一起有效下去了。
$this->switchIdentity($identity, $this->autoRenewCookie ? $duration : 0);
三、退出 logout
public function logout($destroySession = true) { $identity = $this->getIdentity(); if ($identity !== null && $this->beforeLogout($identity)) { $this->switchIdentity(null); $id = $identity->getId(); $ip = Yii::$app->getRequest()->getUserIP(); Yii::info("User '$id' logged out from $ip.", __METHOD__); if ($destroySession) { Yii::$app->getSession()->destroy(); } $this->afterLogout($identity); } return $this->getIsGuest(); } public function switchIdentity($identity, $duration = 0) { $session = Yii::$app->getSession(); if (!YII_ENV_TEST) { $session->regenerateID(true); } $this->setIdentity($identity); $session->remove($this->idParam); $session->remove($this->authTimeoutParam); if ($identity instanceof IdentityInterface) { $session->set($this->idParam, $identity->getId()); if ($this->authTimeout !== null) { $session->set($this->authTimeoutParam, time() + $this->authTimeout); } if ($duration > 0 && $this->enableAutoLogin) { $this->sendIdentityCookie($identity, $duration); } } elseif ($this->enableAutoLogin) { Yii::$app->getResponse()->getCookies()->remove(new Cookie($this->identityCookie)); } }
退出的时候先把当前的认证设置为null，然后再判断如果是自动登录功能则再删除相关的cookie信息。
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