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<?php |
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declare(strict_types=1); |
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namespace SKien\PNServer; |
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use Psr\Log\LoggerAwareTrait; |
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use Psr\Log\NullLogger; |
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/** |
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* Main class of the package to create push notifications. |
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* |
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* @package PNServer |
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* @author Stefanius <[email protected]> |
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* @copyright MIT License - see the LICENSE file for details |
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*/ |
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class PNServer |
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{ |
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use LoggerAwareTrait; |
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use PNServerHelper; |
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/** @var PNDataProvider dataprovider */ |
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protected ?PNDataProvider $oDP = null; |
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/** @var bool set when data has been loaded from DB */ |
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protected bool $bFromDB = false; |
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/** @var bool auto remove invalid/expired subscriptions */ |
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protected bool $bAutoRemove = true; |
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/** @var PNVapid */ |
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protected ?PNVapid $oVapid = null; |
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/** @var string */ |
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protected string $strPayload = ''; |
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/** @var array<PNSubscription> */ |
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protected array $aSubscription = []; |
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/** @var array<string,array<string,mixed>> */ |
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protected array $aLog = []; |
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/** @var int $iAutoRemoved count of items autoremoved in loadSubscriptions */ |
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protected int $iAutoRemoved = 0; |
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/** @var int $iExpired count of expired items */ |
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protected int $iExpired = 0; |
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/** @var string last error msg */ |
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protected string $strError = ''; |
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/** |
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* create instance. |
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* if $oDP specified, subscriptions can be loaded direct from data Source |
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* and invalid or expired subscriptions will be removed automatically in |
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* case rejection from the push service. |
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* |
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* @param PNDataProvider $oDP |
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*/ |
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public function __construct(?PNDataProvider $oDP = null) |
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{ |
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$this->oDP = $oDP; |
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$this->reset(); |
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$this->logger = new NullLogger(); |
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} |
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/** |
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* @return PNDataProvider |
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*/ |
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public function getDP() : ?PNDataProvider |
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{ |
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return $this->oDP; |
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} |
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/** |
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* reset ll to begin new push notification. |
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*/ |
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public function reset() : void |
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{ |
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$this->bFromDB = false; |
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$this->strPayload = ''; |
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$this->oVapid = null; |
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$this->aSubscription = []; |
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$this->aLog = []; |
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} |
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/** |
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* set VAPID subject and keys. |
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* @param PNVapid $oVapid |
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*/ |
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public function setVapid(PNVapid $oVapid) : void |
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{ |
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$this->oVapid = $oVapid; |
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} |
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/** |
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* set payload used for all push notifications. |
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* @param mixed $payload string or PNPayload object |
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*/ |
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public function setPayload($payload) : void |
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{ |
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if (is_string($payload) || self::className($payload) == 'PNPayload') { |
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$this->strPayload = (string) $payload; |
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} |
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} |
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/** |
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* @return string |
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*/ |
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public function getPayload() : string |
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{ |
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return $this->strPayload; |
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} |
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/** |
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* add subscription to the notification list. |
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* @param PNSubscription $oSubscription |
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*/ |
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public function addSubscription(PNSubscription $oSubscription) : void |
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{ |
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if ($oSubscription->isValid()) { |
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$this->aSubscription[] = $oSubscription; |
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} |
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$this->logger->info(__CLASS__ . ': ' . 'added {state} Subscription.', ['state' => $oSubscription->isValid() ? 'valid' : 'invalid']); |
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} |
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/** |
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* Get the count of valid subscriptions set. |
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* @return int |
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*/ |
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public function getSubscriptionCount() : int |
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{ |
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return count($this->aSubscription); |
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} |
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/** |
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* Load subscriptions from internal DataProvider. |
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* if $this->bAutoRemove set (default: true), expired subscriptions will |
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* be automatically removed from the data source. |
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* @return bool |
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*/ |
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public function loadSubscriptions() : bool |
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{ |
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$bSucceeded = false; |
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$this->aSubscription = []; |
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$this->iAutoRemoved = 0; |
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$this->iExpired = 0; |
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if ($this->oDP !== null) { |
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$iBefore = $this->oDP->count(); |
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if (($bSucceeded = $this->oDP->init($this->bAutoRemove)) !== false) { |
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$this->bFromDB = true; |
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$this->iAutoRemoved = $iBefore - $this->oDP->count(); |
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while (($strJsonSub = $this->oDP->fetch()) !== false) { |
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$this->addSubscription(PNSubscription::fromJSON((string) $strJsonSub)); |
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} |
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// if $bAutoRemove is false, $this->iExpired may differs from $this->iAutoRemoved |
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$this->iExpired = $iBefore - count($this->aSubscription); |
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$this->logger->info(__CLASS__ . ': ' . 'added {count} Subscriptions from DB.', ['count' => count($this->aSubscription)]); |
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} else { |
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$this->strError = $this->oDP->getError(); |
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$this->logger->error(__CLASS__ . ': ' . $this->strError); |
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} |
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} else { |
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$this->strError = 'missing dataprovider!'; |
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$this->logger->error(__CLASS__ . ': ' . $this->strError); |
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} |
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return $bSucceeded; |
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} |
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/** |
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* auto remove invalid/expired subscriptions. |
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* has only affect, if data loaded through DataProvider |
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* @param bool $bAutoRemove |
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*/ |
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public function setAutoRemove(bool $bAutoRemove = true) : void |
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{ |
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$this->bAutoRemove = $bAutoRemove; |
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} |
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/** |
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* push all notifications. |
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* |
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* Since a large number is expected when sending PUSH notifications, the |
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* POST requests are generated asynchronously via a cURL multi handle. |
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* The response codes are then assigned to the respective end point and a |
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* transmission log is generated. |
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* If the subscriptions comes from the internal data provider, all |
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* subscriptions that are no longer valid or that are no longer available |
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* with the push service will be removed from the database. |
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* @return bool |
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*/ |
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public function push() : bool |
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{ |
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if (!$this->oVapid) { |
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$this->strError = 'no VAPID-keys set!'; |
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$this->logger->error(__CLASS__ . ': ' . $this->strError); |
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} elseif (!$this->oVapid->isValid()) { |
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$this->strError = 'VAPID error: ' . $this->oVapid->getError(); |
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$this->logger->error(__CLASS__ . ': ' . $this->strError); |
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} elseif (count($this->aSubscription) == 0) { |
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$this->strError = 'no valid Subscriptions set!'; |
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$this->logger->warning(__CLASS__ . ': ' . $this->strError); |
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} else { |
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// create multi requests... |
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$mcurl = curl_multi_init(); |
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if ($mcurl !== false) { |
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$aRequests = array(); |
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foreach ($this->aSubscription as $oSub) { |
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$aLog = ['msg' => '', 'curl_response' => '', 'curl_response_code' => -1]; |
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// payload must be encrypted every time although it does not change, since |
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// each subscription has at least his public key and authentication token of its own ... |
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$oEncrypt = new PNEncryption($oSub->getPublicKey(), $oSub->getAuth(), $oSub->getEncoding()); |
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if (($strContent = $oEncrypt->encrypt($this->strPayload)) !== false) { |
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// merge headers from encryption and VAPID (maybe both containing 'Crypto-Key') |
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if (($aVapidHeaders = $this->oVapid->getHeaders($oSub->getEndpoint())) !== false) { |
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$aHeaders = $oEncrypt->getHeaders($aVapidHeaders); |
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$aHeaders['Content-Length'] = mb_strlen($strContent, '8bit'); |
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$aHeaders['TTL'] = 2419200; |
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// build Http - Headers |
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$aHttpHeader = array(); |
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foreach ($aHeaders as $strName => $strValue) { |
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$aHttpHeader[] = $strName . ': ' . $strValue; |
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} |
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// and send request with curl |
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$curl = curl_init($oSub->getEndpoint()); |
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if ($curl !== false) { |
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curl_setopt($curl, CURLOPT_POST, true); |
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curl_setopt($curl, CURLOPT_POSTFIELDS, $strContent); |
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curl_setopt($curl, CURLOPT_HTTPHEADER, $aHttpHeader); |
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curl_setopt($curl, CURLOPT_RETURNTRANSFER, true); |
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curl_multi_add_handle($mcurl, $curl); |
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$aRequests[$oSub->getEndpoint()] = $curl; |
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} |
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} else { |
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$aLog['msg'] = 'VAPID error: ' . $this->oVapid->getError(); |
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} |
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} else { |
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$aLog['msg'] = 'Payload encryption error: ' . $oEncrypt->getError(); |
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} |
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if (strlen($aLog['msg']) > 0) { |
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$this->aLog[$oSub->getEndpoint()] = $aLog; |
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} |
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} |
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if (count($aRequests) > 0) { |
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// now performing multi request... |
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$iRunning = null; |
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do { |
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$iMState = curl_multi_exec($mcurl, $iRunning); |
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} while ($iRunning && $iMState == CURLM_OK); |
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if ($iMState == CURLM_OK) { |
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// ...and get response of each request |
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foreach ($aRequests as $strEndPoint => $curl) { |
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$aLog = array(); |
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$iRescode = curl_getinfo($curl, CURLINFO_RESPONSE_CODE); |
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$aLog['msg'] = $this->getPushServiceResponseText($iRescode); |
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$aLog['curl_response'] = curl_multi_getcontent($curl); |
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$aLog['curl_response_code'] = $iRescode; |
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$this->aLog[$strEndPoint] = $aLog; |
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// remove handle from multi and close |
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curl_multi_remove_handle($mcurl, $curl); |
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curl_close($curl); |
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} |
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} else { |
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$this->strError = 'curl_multi_exec() Erroro: ' . curl_multi_strerror($iMState); |
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$this->logger->error(__CLASS__ . ': ' . $this->strError); |
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} |
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// ... close the door |
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curl_multi_close($mcurl); |
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} |
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if ($this->oDP != null && $this->bFromDB && $this->bAutoRemove) { |
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foreach ($this->aLog as $strEndPoint => $aLogItem) { |
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if ($this->checkAutoRemove($aLogItem['curl_response_code'])) { |
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// just remove subscription from DB |
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$aLogItem['msg'] .= ' Subscription removed from DB!'; |
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$this->oDP->removeSubscription($strEndPoint); |
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} |
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} |
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} |
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} |
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} |
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$this->logger->info(__CLASS__ . ': ' . 'notifications pushed', $this->getSummary()); |
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return (strlen($this->strError) == 0); |
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} |
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/** |
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* Push one single subscription. |
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* @param PNSubscription $oSub |
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* @return bool |
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*/ |
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public function pushSingle(PNSubscription $oSub) : bool |
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{ |
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if (!$this->oVapid) { |
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$this->strError = 'no VAPID-keys set!'; |
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$this->logger->error(__CLASS__ . ': ' . $this->strError); |
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} elseif (!$this->oVapid->isValid()) { |
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$this->strError = 'VAPID error: ' . $this->oVapid->getError(); |
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$this->logger->error(__CLASS__ . ': ' . $this->strError); |
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} else { |
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$aLog = ['msg' => '', 'curl_response' => '', 'curl_response_code' => -1]; |
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// payload must be encrypted every time although it does not change, since |
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// each subscription has at least his public key and authentication token of its own ... |
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$oEncrypt = new PNEncryption($oSub->getPublicKey(), $oSub->getAuth(), $oSub->getEncoding()); |
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if (($strContent = $oEncrypt->encrypt($this->strPayload)) !== false) { |
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// merge headers from encryption and VAPID (maybe both containing 'Crypto-Key') |
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if (($aVapidHeaders = $this->oVapid->getHeaders($oSub->getEndpoint())) !== false) { |
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$aHeaders = $oEncrypt->getHeaders($aVapidHeaders); |
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$aHeaders['Content-Length'] = mb_strlen($strContent, '8bit'); |
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$aHeaders['TTL'] = 2419200; |
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// build Http - Headers |
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$aHttpHeader = array(); |
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foreach ($aHeaders as $strName => $strValue) { |
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$aHttpHeader[] = $strName . ': ' . $strValue; |
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} |
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// and send request with curl |
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$curl = curl_init($oSub->getEndpoint()); |
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if ($curl !== false) { |
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curl_setopt($curl, CURLOPT_POST, true); |
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curl_setopt($curl, CURLOPT_POSTFIELDS, $strContent); |
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curl_setopt($curl, CURLOPT_HTTPHEADER, $aHttpHeader); |
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curl_setopt($curl, CURLOPT_RETURNTRANSFER, true); |
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if (($strResponse = curl_exec($curl)) !== false) { |
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$iRescode = curl_getinfo($curl, CURLINFO_RESPONSE_CODE); |
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$aLog['msg'] = $this->getPushServiceResponseText($iRescode); |
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$aLog['curl_response'] = $strResponse; |
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$aLog['curl_response_code'] = $iRescode; |
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curl_close($curl); |
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} |
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} |
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} else { |
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$aLog['msg'] = 'VAPID error: ' . $this->oVapid->getError(); |
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} |
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} else { |
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$aLog['msg'] = 'Payload encryption error: ' . $oEncrypt->getError(); |
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} |
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$this->aLog[$oSub->getEndpoint()] = $aLog; |
341
|
|
|
} |
342
|
|
|
$this->logger->info(__CLASS__ . ': ' . 'single notifications pushed.'); |
343
|
|
|
return (strlen($this->strError) == 0); |
344
|
|
|
} |
345
|
|
|
|
346
|
|
|
/** |
347
|
|
|
* @return array<string,array<string,mixed>> |
348
|
|
|
*/ |
349
|
|
|
public function getLog() : array |
350
|
|
|
{ |
351
|
|
|
return $this->aLog; |
352
|
|
|
} |
353
|
|
|
|
354
|
|
|
/** |
355
|
|
|
* Build summary for the log of the last push operation. |
356
|
|
|
* - total count of subscriptions processed<br/> |
357
|
|
|
* - count of successfull pushed messages<br/> |
358
|
|
|
* - count of failed messages (subscriptions couldn't be pushed of any reason)<br/> |
359
|
|
|
* - count of expired subscriptions<br/> |
360
|
|
|
* - count of removed subscriptions (expired, gone, not found, invalid)<br/> |
361
|
|
|
* The count of expired entries removed in the loadSubscriptions() is added to |
362
|
|
|
* the count of responsecode caused removed items. |
363
|
|
|
* The count of failed and removed messages may differ even if $bAutoRemove is set |
364
|
|
|
* if there are transferns with responsecode 413 or 429 |
365
|
|
|
* @return array<string,int> |
366
|
|
|
*/ |
367
|
|
|
public function getSummary() : array |
368
|
|
|
{ |
369
|
|
|
$aSummary = [ |
370
|
|
|
'total' => $this->iExpired, |
371
|
|
|
'pushed' => 0, |
372
|
|
|
'failed' => 0, |
373
|
|
|
'expired' => $this->iExpired, |
374
|
|
|
'removed' => $this->iAutoRemoved, |
375
|
|
|
]; |
376
|
|
|
foreach ($this->aLog as $aLogItem) { |
377
|
|
|
$aSummary['total']++; |
378
|
|
|
if ($aLogItem['curl_response_code'] == 201) { |
379
|
|
|
$aSummary['pushed']++; |
380
|
|
|
} else { |
381
|
|
|
$aSummary['failed']++; |
382
|
|
|
if ($this->checkAutoRemove($aLogItem['curl_response_code'])) { |
383
|
|
|
$aSummary['removed']++; |
384
|
|
|
} |
385
|
|
|
} |
386
|
|
|
} |
387
|
|
|
return $aSummary; |
388
|
|
|
} |
389
|
|
|
|
390
|
|
|
/** |
391
|
|
|
* @return string last error |
392
|
|
|
*/ |
393
|
|
|
public function getError() : string |
394
|
|
|
{ |
395
|
|
|
return $this->strError; |
396
|
|
|
} |
397
|
|
|
|
398
|
|
|
/** |
399
|
|
|
* Check if item should be removed. |
400
|
|
|
* We remove items with responsecode<br/> |
401
|
|
|
* -> 0: unknown responsecode (usually unknown/invalid endpoint origin)<br/> |
402
|
|
|
* -> -1: Payload encryption error<br/> |
403
|
|
|
* -> 400: Invalid request<br/> |
404
|
|
|
* -> 404: Not Found<br/> |
405
|
|
|
* -> 410: Gone<br/> |
406
|
|
|
* |
407
|
|
|
* @param int $iRescode |
408
|
|
|
* @return bool |
409
|
|
|
*/ |
410
|
|
|
protected function checkAutoRemove(int $iRescode) : bool |
411
|
|
|
{ |
412
|
|
|
$aRemove = $this->bAutoRemove ? [-1, 0, 400, 404, 410] : []; |
413
|
|
|
return in_array($iRescode, $aRemove); |
414
|
|
|
} |
415
|
|
|
|
416
|
|
|
/** |
417
|
|
|
* get text according to given push service responsecode |
418
|
|
|
* |
419
|
|
|
* push service response codes |
420
|
|
|
* 201: The request to send a push message was received and accepted. |
421
|
|
|
* 400: Invalid request. This generally means one of your headers is invalid or improperly formatted. |
422
|
|
|
* 404: Not Found. This is an indication that the subscription is expired and can't be used. In this case |
423
|
|
|
* you should delete the PushSubscription and wait for the client to resubscribe the user. |
424
|
|
|
* 410: Gone. The subscription is no longer valid and should be removed from application server. This can |
425
|
|
|
* be reproduced by calling `unsubscribe()` on a `PushSubscription`. |
426
|
|
|
* 413: Payload size too large. The minimum size payload a push service must support is 4096 bytes (or 4kb). |
427
|
|
|
* 429: Too many requests. Meaning your application server has reached a rate limit with a push service. |
428
|
|
|
* The push service should include a 'Retry-After' header to indicate how long before another request |
429
|
|
|
* can be made. |
430
|
|
|
* |
431
|
|
|
* @param int $iRescode |
432
|
|
|
* @return string |
433
|
|
|
*/ |
434
|
|
|
protected function getPushServiceResponseText(int $iRescode) : string |
435
|
|
|
{ |
436
|
|
|
$strText = 'unknwown Rescode from push service: ' . $iRescode; |
437
|
|
|
$aText = array( |
438
|
|
|
201 => "The request to send a push message was received and accepted.", |
439
|
|
|
400 => "Invalid request. Invalid headers or improperly formatted.", |
440
|
|
|
404 => "Not Found. Subscription is expired and can't be used anymore.", |
441
|
|
|
410 => "Gone. Subscription is no longer valid.", // This can be reproduced by calling 'unsubscribe()' on a 'PushSubscription'. |
442
|
|
|
413 => "Payload size too large.", |
443
|
|
|
429 => "Too many requests. Your application server has reached a rate limit with a push service." |
444
|
|
|
); |
445
|
|
|
if (isset($aText[$iRescode])) { |
446
|
|
|
$strText = $aText[$iRescode]; |
447
|
|
|
} |
448
|
|
|
return $strText; |
449
|
|
|
} |
450
|
|
|
} |
451
|
|
|
|