mirror of
https://github.com/torrentpier/torrentpier-lts.git
synced 2025-03-01 15:21:02 +03:00
838 lines
25 KiB
PHP
838 lines
25 KiB
PHP
<?php
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/**
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* Zend Framework (http://framework.zend.com/)
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*
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* @link http://github.com/zendframework/zf2 for the canonical source repository
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* @copyright Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
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* @license http://framework.zend.com/license/new-bsd New BSD License
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*/
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namespace Zend\Feed\PubSubHubbub;
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use DateInterval;
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use DateTime;
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use Traversable;
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use Zend\Feed\Uri;
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use Zend\Http\Request as HttpRequest;
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use Zend\Stdlib\ArrayUtils;
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class Subscriber
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{
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/**
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* An array of URLs for all Hub Servers to subscribe/unsubscribe.
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*
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* @var array
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*/
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protected $hubUrls = array();
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/**
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* An array of optional parameters to be included in any
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* (un)subscribe requests.
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*
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* @var array
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*/
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protected $parameters = array();
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/**
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* The URL of the topic (Rss or Atom feed) which is the subject of
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* our current intent to subscribe to/unsubscribe from updates from
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* the currently configured Hub Servers.
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*
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* @var string
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*/
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protected $topicUrl = '';
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/**
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* The URL Hub Servers must use when communicating with this Subscriber
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*
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* @var string
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*/
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protected $callbackUrl = '';
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/**
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* The number of seconds for which the subscriber would like to have the
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* subscription active. Defaults to null, i.e. not sent, to setup a
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* permanent subscription if possible.
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*
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* @var int
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*/
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protected $leaseSeconds = null;
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/**
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* The preferred verification mode (sync or async). By default, this
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* Subscriber prefers synchronous verification, but is considered
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* desirable to support asynchronous verification if possible.
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*
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* Zend\Feed\Pubsubhubbub\Subscriber will always send both modes, whose
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* order of occurrence in the parameter list determines this preference.
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*
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* @var string
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*/
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protected $preferredVerificationMode = PubSubHubbub::VERIFICATION_MODE_SYNC;
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/**
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* An array of any errors including keys for 'response', 'hubUrl'.
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* The response is the actual Zend\Http\Response object.
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*
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* @var array
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*/
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protected $errors = array();
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/**
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* An array of Hub Server URLs for Hubs operating at this time in
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* asynchronous verification mode.
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*
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* @var array
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*/
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protected $asyncHubs = array();
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/**
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* An instance of Zend\Feed\Pubsubhubbub\Model\SubscriptionPersistence used to background
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* save any verification tokens associated with a subscription or other.
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*
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* @var \Zend\Feed\PubSubHubbub\Model\SubscriptionPersistenceInterface
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*/
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protected $storage = null;
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/**
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* An array of authentication credentials for HTTP Basic Authentication
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* if required by specific Hubs. The array is indexed by Hub Endpoint URI
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* and the value is a simple array of the username and password to apply.
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*
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* @var array
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*/
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protected $authentications = array();
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/**
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* Tells the Subscriber to append any subscription identifier to the path
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* of the base Callback URL. E.g. an identifier "subkey1" would be added
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* to the callback URL "http://www.example.com/callback" to create a subscription
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* specific Callback URL of "http://www.example.com/callback/subkey1".
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*
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* This is required for all Hubs using the Pubsubhubbub 0.1 Specification.
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* It should be manually intercepted and passed to the Callback class using
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* Zend\Feed\Pubsubhubbub\Subscriber\Callback::setSubscriptionKey(). Will
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* require a route in the form "callback/:subkey" to allow the parameter be
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* retrieved from an action using the Zend\Controller\Action::\getParam()
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* method.
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*
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* @var string
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*/
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protected $usePathParameter = false;
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/**
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* Constructor; accepts an array or Traversable instance to preset
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* options for the Subscriber without calling all supported setter
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* methods in turn.
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*
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* @param array|Traversable $options
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*/
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public function __construct($options = null)
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{
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if ($options !== null) {
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$this->setOptions($options);
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}
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}
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/**
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* Process any injected configuration options
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*
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* @param array|Traversable $options
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* @return Subscriber
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* @throws Exception\InvalidArgumentException
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*/
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public function setOptions($options)
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{
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if ($options instanceof Traversable) {
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$options = ArrayUtils::iteratorToArray($options);
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}
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if (!is_array($options)) {
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throw new Exception\InvalidArgumentException('Array or Traversable object'
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. 'expected, got ' . gettype($options));
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}
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if (array_key_exists('hubUrls', $options)) {
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$this->addHubUrls($options['hubUrls']);
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}
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if (array_key_exists('callbackUrl', $options)) {
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$this->setCallbackUrl($options['callbackUrl']);
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}
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if (array_key_exists('topicUrl', $options)) {
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$this->setTopicUrl($options['topicUrl']);
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}
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if (array_key_exists('storage', $options)) {
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$this->setStorage($options['storage']);
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}
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if (array_key_exists('leaseSeconds', $options)) {
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$this->setLeaseSeconds($options['leaseSeconds']);
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}
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if (array_key_exists('parameters', $options)) {
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$this->setParameters($options['parameters']);
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}
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if (array_key_exists('authentications', $options)) {
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$this->addAuthentications($options['authentications']);
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}
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if (array_key_exists('usePathParameter', $options)) {
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$this->usePathParameter($options['usePathParameter']);
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}
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if (array_key_exists('preferredVerificationMode', $options)) {
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$this->setPreferredVerificationMode(
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$options['preferredVerificationMode']
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);
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}
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return $this;
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}
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/**
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* Set the topic URL (RSS or Atom feed) to which the intended (un)subscribe
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* event will relate
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*
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* @param string $url
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* @return Subscriber
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* @throws Exception\InvalidArgumentException
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*/
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public function setTopicUrl($url)
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{
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if (empty($url) || !is_string($url) || !Uri::factory($url)->isValid()) {
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throw new Exception\InvalidArgumentException('Invalid parameter "url"'
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.' of "' . $url . '" must be a non-empty string and a valid'
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.' URL');
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}
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$this->topicUrl = $url;
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return $this;
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}
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/**
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* Set the topic URL (RSS or Atom feed) to which the intended (un)subscribe
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* event will relate
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*
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* @return string
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* @throws Exception\RuntimeException
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*/
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public function getTopicUrl()
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{
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if (empty($this->topicUrl)) {
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throw new Exception\RuntimeException('A valid Topic (RSS or Atom'
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. ' feed) URL MUST be set before attempting any operation');
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}
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return $this->topicUrl;
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}
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/**
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* Set the number of seconds for which any subscription will remain valid
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*
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* @param int $seconds
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* @return Subscriber
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* @throws Exception\InvalidArgumentException
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*/
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public function setLeaseSeconds($seconds)
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{
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$seconds = intval($seconds);
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if ($seconds <= 0) {
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throw new Exception\InvalidArgumentException('Expected lease seconds'
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. ' must be an integer greater than zero');
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}
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$this->leaseSeconds = $seconds;
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return $this;
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}
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/**
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* Get the number of lease seconds on subscriptions
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*
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* @return int
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*/
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public function getLeaseSeconds()
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{
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return $this->leaseSeconds;
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}
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/**
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* Set the callback URL to be used by Hub Servers when communicating with
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* this Subscriber
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*
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* @param string $url
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* @return Subscriber
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* @throws Exception\InvalidArgumentException
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*/
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public function setCallbackUrl($url)
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{
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if (empty($url) || !is_string($url) || !Uri::factory($url)->isValid()) {
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throw new Exception\InvalidArgumentException('Invalid parameter "url"'
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. ' of "' . $url . '" must be a non-empty string and a valid'
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. ' URL');
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}
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$this->callbackUrl = $url;
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return $this;
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}
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/**
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* Get the callback URL to be used by Hub Servers when communicating with
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* this Subscriber
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*
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* @return string
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* @throws Exception\RuntimeException
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*/
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public function getCallbackUrl()
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{
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if (empty($this->callbackUrl)) {
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throw new Exception\RuntimeException('A valid Callback URL MUST be'
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. ' set before attempting any operation');
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}
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return $this->callbackUrl;
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}
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/**
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* Set preferred verification mode (sync or async). By default, this
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* Subscriber prefers synchronous verification, but does support
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* asynchronous if that's the Hub Server's utilised mode.
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*
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* Zend\Feed\Pubsubhubbub\Subscriber will always send both modes, whose
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* order of occurrence in the parameter list determines this preference.
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*
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* @param string $mode Should be 'sync' or 'async'
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* @return Subscriber
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* @throws Exception\InvalidArgumentException
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*/
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public function setPreferredVerificationMode($mode)
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{
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if ($mode !== PubSubHubbub::VERIFICATION_MODE_SYNC
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&& $mode !== PubSubHubbub::VERIFICATION_MODE_ASYNC
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) {
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throw new Exception\InvalidArgumentException('Invalid preferred'
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. ' mode specified: "' . $mode . '" but should be one of'
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. ' Zend\Feed\Pubsubhubbub::VERIFICATION_MODE_SYNC or'
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. ' Zend\Feed\Pubsubhubbub::VERIFICATION_MODE_ASYNC');
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}
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$this->preferredVerificationMode = $mode;
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return $this;
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}
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/**
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* Get preferred verification mode (sync or async).
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*
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* @return string
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*/
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public function getPreferredVerificationMode()
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{
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return $this->preferredVerificationMode;
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}
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/**
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* Add a Hub Server URL supported by Publisher
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*
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* @param string $url
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* @return Subscriber
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* @throws Exception\InvalidArgumentException
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*/
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public function addHubUrl($url)
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{
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if (empty($url) || !is_string($url) || !Uri::factory($url)->isValid()) {
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throw new Exception\InvalidArgumentException('Invalid parameter "url"'
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. ' of "' . $url . '" must be a non-empty string and a valid'
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. ' URL');
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}
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$this->hubUrls[] = $url;
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return $this;
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}
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/**
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* Add an array of Hub Server URLs supported by Publisher
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*
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* @param array $urls
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* @return Subscriber
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*/
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public function addHubUrls(array $urls)
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{
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foreach ($urls as $url) {
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$this->addHubUrl($url);
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}
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return $this;
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}
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/**
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* Remove a Hub Server URL
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*
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* @param string $url
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* @return Subscriber
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*/
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public function removeHubUrl($url)
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{
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if (!in_array($url, $this->getHubUrls())) {
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return $this;
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}
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$key = array_search($url, $this->hubUrls);
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unset($this->hubUrls[$key]);
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return $this;
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}
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/**
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* Return an array of unique Hub Server URLs currently available
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*
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* @return array
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*/
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public function getHubUrls()
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{
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$this->hubUrls = array_unique($this->hubUrls);
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return $this->hubUrls;
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}
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/**
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* Add authentication credentials for a given URL
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*
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* @param string $url
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* @param array $authentication
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* @return Subscriber
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* @throws Exception\InvalidArgumentException
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*/
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public function addAuthentication($url, array $authentication)
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{
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if (empty($url) || !is_string($url) || !Uri::factory($url)->isValid()) {
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throw new Exception\InvalidArgumentException('Invalid parameter "url"'
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. ' of "' . $url . '" must be a non-empty string and a valid'
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. ' URL');
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}
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$this->authentications[$url] = $authentication;
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return $this;
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}
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/**
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* Add authentication credentials for hub URLs
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*
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* @param array $authentications
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* @return Subscriber
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*/
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public function addAuthentications(array $authentications)
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{
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foreach ($authentications as $url => $authentication) {
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$this->addAuthentication($url, $authentication);
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}
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return $this;
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}
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/**
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* Get all hub URL authentication credentials
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*
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* @return array
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*/
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public function getAuthentications()
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{
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return $this->authentications;
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}
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/**
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* Set flag indicating whether or not to use a path parameter
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*
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* @param bool $bool
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* @return Subscriber
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*/
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public function usePathParameter($bool = true)
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{
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$this->usePathParameter = $bool;
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return $this;
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}
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/**
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* Add an optional parameter to the (un)subscribe requests
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*
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* @param string $name
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* @param string|null $value
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* @return Subscriber
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* @throws Exception\InvalidArgumentException
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*/
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public function setParameter($name, $value = null)
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{
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if (is_array($name)) {
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$this->setParameters($name);
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return $this;
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}
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if (empty($name) || !is_string($name)) {
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throw new Exception\InvalidArgumentException('Invalid parameter "name"'
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. ' of "' . $name . '" must be a non-empty string');
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}
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if ($value === null) {
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$this->removeParameter($name);
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return $this;
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}
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if (empty($value) || (!is_string($value) && $value !== null)) {
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throw new Exception\InvalidArgumentException('Invalid parameter "value"'
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. ' of "' . $value . '" must be a non-empty string');
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}
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$this->parameters[$name] = $value;
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return $this;
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}
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/**
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* Add an optional parameter to the (un)subscribe requests
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*
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* @param array $parameters
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* @return Subscriber
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*/
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public function setParameters(array $parameters)
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{
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foreach ($parameters as $name => $value) {
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$this->setParameter($name, $value);
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}
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return $this;
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}
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/**
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* Remove an optional parameter for the (un)subscribe requests
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*
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* @param string $name
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* @return Subscriber
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* @throws Exception\InvalidArgumentException
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*/
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public function removeParameter($name)
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{
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if (empty($name) || !is_string($name)) {
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throw new Exception\InvalidArgumentException('Invalid parameter "name"'
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. ' of "' . $name . '" must be a non-empty string');
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}
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if (array_key_exists($name, $this->parameters)) {
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unset($this->parameters[$name]);
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}
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return $this;
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}
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/**
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* Return an array of optional parameters for (un)subscribe requests
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*
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* @return array
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*/
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public function getParameters()
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{
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return $this->parameters;
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}
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/**
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* Sets an instance of Zend\Feed\Pubsubhubbub\Model\SubscriptionPersistence used to background
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* save any verification tokens associated with a subscription or other.
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*
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* @param Model\SubscriptionPersistenceInterface $storage
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* @return Subscriber
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*/
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public function setStorage(Model\SubscriptionPersistenceInterface $storage)
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{
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$this->storage = $storage;
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return $this;
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}
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/**
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* Gets an instance of Zend\Feed\Pubsubhubbub\Storage\StoragePersistence used
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* to background save any verification tokens associated with a subscription
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* or other.
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*
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* @return Model\SubscriptionPersistenceInterface
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* @throws Exception\RuntimeException
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*/
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public function getStorage()
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{
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if ($this->storage === null) {
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throw new Exception\RuntimeException('No storage vehicle '
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. 'has been set.');
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}
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return $this->storage;
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}
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/**
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* Subscribe to one or more Hub Servers using the stored Hub URLs
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* for the given Topic URL (RSS or Atom feed)
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*
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* @return void
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*/
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public function subscribeAll()
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{
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$this->_doRequest('subscribe');
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}
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/**
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* Unsubscribe from one or more Hub Servers using the stored Hub URLs
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* for the given Topic URL (RSS or Atom feed)
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*
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* @return void
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*/
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public function unsubscribeAll()
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{
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$this->_doRequest('unsubscribe');
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}
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/**
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* Returns a boolean indicator of whether the notifications to Hub
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* Servers were ALL successful. If even one failed, FALSE is returned.
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*
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* @return bool
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*/
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public function isSuccess()
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{
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if (count($this->errors) > 0) {
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return false;
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}
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return true;
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}
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/**
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* Return an array of errors met from any failures, including keys:
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* 'response' => the Zend\Http\Response object from the failure
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* 'hubUrl' => the URL of the Hub Server whose notification failed
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*
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* @return array
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*/
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public function getErrors()
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{
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return $this->errors;
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}
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/**
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|
* Return an array of Hub Server URLs who returned a response indicating
|
|
* operation in Asynchronous Verification Mode, i.e. they will not confirm
|
|
* any (un)subscription immediately but at a later time (Hubs may be
|
|
* doing this as a batch process when load balancing)
|
|
*
|
|
* @return array
|
|
*/
|
|
public function getAsyncHubs()
|
|
{
|
|
return $this->asyncHubs;
|
|
}
|
|
|
|
/**
|
|
* Executes an (un)subscribe request
|
|
*
|
|
* @param string $mode
|
|
* @return void
|
|
* @throws Exception\RuntimeException
|
|
*/
|
|
protected function _doRequest($mode)
|
|
{
|
|
$client = $this->_getHttpClient();
|
|
$hubs = $this->getHubUrls();
|
|
if (empty($hubs)) {
|
|
throw new Exception\RuntimeException('No Hub Server URLs'
|
|
. ' have been set so no subscriptions can be attempted');
|
|
}
|
|
$this->errors = array();
|
|
$this->asyncHubs = array();
|
|
foreach ($hubs as $url) {
|
|
if (array_key_exists($url, $this->authentications)) {
|
|
$auth = $this->authentications[$url];
|
|
$client->setAuth($auth[0], $auth[1]);
|
|
}
|
|
$client->setUri($url);
|
|
$client->setRawBody($params = $this->_getRequestParameters($url, $mode));
|
|
$response = $client->send();
|
|
if ($response->getStatusCode() !== 204
|
|
&& $response->getStatusCode() !== 202
|
|
) {
|
|
$this->errors[] = array(
|
|
'response' => $response,
|
|
'hubUrl' => $url,
|
|
);
|
|
/**
|
|
* At first I thought it was needed, but the backend storage will
|
|
* allow tracking async without any user interference. It's left
|
|
* here in case the user is interested in knowing what Hubs
|
|
* are using async verification modes so they may update Models and
|
|
* move these to asynchronous processes.
|
|
*/
|
|
} elseif ($response->getStatusCode() == 202) {
|
|
$this->asyncHubs[] = array(
|
|
'response' => $response,
|
|
'hubUrl' => $url,
|
|
);
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Get a basic prepared HTTP client for use
|
|
*
|
|
* @return \Zend\Http\Client
|
|
*/
|
|
protected function _getHttpClient()
|
|
{
|
|
$client = PubSubHubbub::getHttpClient();
|
|
$client->setMethod(HttpRequest::METHOD_POST);
|
|
$client->setOptions(array('useragent' => 'Zend_Feed_Pubsubhubbub_Subscriber/'
|
|
. Version::VERSION));
|
|
return $client;
|
|
}
|
|
|
|
/**
|
|
* Return a list of standard protocol/optional parameters for addition to
|
|
* client's POST body that are specific to the current Hub Server URL
|
|
*
|
|
* @param string $hubUrl
|
|
* @param string $mode
|
|
* @return string
|
|
* @throws Exception\InvalidArgumentException
|
|
*/
|
|
protected function _getRequestParameters($hubUrl, $mode)
|
|
{
|
|
if (!in_array($mode, array('subscribe', 'unsubscribe'))) {
|
|
throw new Exception\InvalidArgumentException('Invalid mode specified: "'
|
|
. $mode . '" which should have been "subscribe" or "unsubscribe"');
|
|
}
|
|
|
|
$params = array(
|
|
'hub.mode' => $mode,
|
|
'hub.topic' => $this->getTopicUrl(),
|
|
);
|
|
|
|
if ($this->getPreferredVerificationMode()
|
|
== PubSubHubbub::VERIFICATION_MODE_SYNC
|
|
) {
|
|
$vmodes = array(
|
|
PubSubHubbub::VERIFICATION_MODE_SYNC,
|
|
PubSubHubbub::VERIFICATION_MODE_ASYNC,
|
|
);
|
|
} else {
|
|
$vmodes = array(
|
|
PubSubHubbub::VERIFICATION_MODE_ASYNC,
|
|
PubSubHubbub::VERIFICATION_MODE_SYNC,
|
|
);
|
|
}
|
|
$params['hub.verify'] = array();
|
|
foreach ($vmodes as $vmode) {
|
|
$params['hub.verify'][] = $vmode;
|
|
}
|
|
|
|
/**
|
|
* Establish a persistent verify_token and attach key to callback
|
|
* URL's path/query_string
|
|
*/
|
|
$key = $this->_generateSubscriptionKey($params, $hubUrl);
|
|
$token = $this->_generateVerifyToken();
|
|
$params['hub.verify_token'] = $token;
|
|
|
|
// Note: query string only usable with PuSH 0.2 Hubs
|
|
if (!$this->usePathParameter) {
|
|
$params['hub.callback'] = $this->getCallbackUrl()
|
|
. '?xhub.subscription=' . PubSubHubbub::urlencode($key);
|
|
} else {
|
|
$params['hub.callback'] = rtrim($this->getCallbackUrl(), '/')
|
|
. '/' . PubSubHubbub::urlencode($key);
|
|
}
|
|
if ($mode == 'subscribe' && $this->getLeaseSeconds() !== null) {
|
|
$params['hub.lease_seconds'] = $this->getLeaseSeconds();
|
|
}
|
|
|
|
// hub.secret not currently supported
|
|
$optParams = $this->getParameters();
|
|
foreach ($optParams as $name => $value) {
|
|
$params[$name] = $value;
|
|
}
|
|
|
|
// store subscription to storage
|
|
$now = new DateTime();
|
|
$expires = null;
|
|
if (isset($params['hub.lease_seconds'])) {
|
|
$expires = $now->add(new DateInterval('PT' . $params['hub.lease_seconds'] . 'S'))
|
|
->format('Y-m-d H:i:s');
|
|
}
|
|
$data = array(
|
|
'id' => $key,
|
|
'topic_url' => $params['hub.topic'],
|
|
'hub_url' => $hubUrl,
|
|
'created_time' => $now->format('Y-m-d H:i:s'),
|
|
'lease_seconds' => $params['hub.lease_seconds'],
|
|
'verify_token' => hash('sha256', $params['hub.verify_token']),
|
|
'secret' => null,
|
|
'expiration_time' => $expires,
|
|
'subscription_state' => ($mode == 'unsubscribe')? PubSubHubbub::SUBSCRIPTION_TODELETE : PubSubHubbub::SUBSCRIPTION_NOTVERIFIED,
|
|
);
|
|
$this->getStorage()->setSubscription($data);
|
|
|
|
return $this->_toByteValueOrderedString(
|
|
$this->_urlEncode($params)
|
|
);
|
|
}
|
|
|
|
/**
|
|
* Simple helper to generate a verification token used in (un)subscribe
|
|
* requests to a Hub Server. Follows no particular method, which means
|
|
* it might be improved/changed in future.
|
|
*
|
|
* @return string
|
|
*/
|
|
protected function _generateVerifyToken()
|
|
{
|
|
if (!empty($this->testStaticToken)) {
|
|
return $this->testStaticToken;
|
|
}
|
|
return uniqid(rand(), true) . time();
|
|
}
|
|
|
|
/**
|
|
* Simple helper to generate a verification token used in (un)subscribe
|
|
* requests to a Hub Server.
|
|
*
|
|
* @param array $params
|
|
* @param string $hubUrl The Hub Server URL for which this token will apply
|
|
* @return string
|
|
*/
|
|
protected function _generateSubscriptionKey(array $params, $hubUrl)
|
|
{
|
|
$keyBase = $params['hub.topic'] . $hubUrl;
|
|
$key = md5($keyBase);
|
|
|
|
return $key;
|
|
}
|
|
|
|
/**
|
|
* URL Encode an array of parameters
|
|
*
|
|
* @param array $params
|
|
* @return array
|
|
*/
|
|
protected function _urlEncode(array $params)
|
|
{
|
|
$encoded = array();
|
|
foreach ($params as $key => $value) {
|
|
if (is_array($value)) {
|
|
$ekey = PubSubHubbub::urlencode($key);
|
|
$encoded[$ekey] = array();
|
|
foreach ($value as $duplicateKey) {
|
|
$encoded[$ekey][]
|
|
= PubSubHubbub::urlencode($duplicateKey);
|
|
}
|
|
} else {
|
|
$encoded[PubSubHubbub::urlencode($key)]
|
|
= PubSubHubbub::urlencode($value);
|
|
}
|
|
}
|
|
return $encoded;
|
|
}
|
|
|
|
/**
|
|
* Order outgoing parameters
|
|
*
|
|
* @param array $params
|
|
* @return array
|
|
*/
|
|
protected function _toByteValueOrderedString(array $params)
|
|
{
|
|
$return = array();
|
|
uksort($params, 'strnatcmp');
|
|
foreach ($params as $key => $value) {
|
|
if (is_array($value)) {
|
|
foreach ($value as $keyduplicate) {
|
|
$return[] = $key . '=' . $keyduplicate;
|
|
}
|
|
} else {
|
|
$return[] = $key . '=' . $value;
|
|
}
|
|
}
|
|
return implode('&', $return);
|
|
}
|
|
|
|
/**
|
|
* This is STRICTLY for testing purposes only...
|
|
*/
|
|
protected $testStaticToken = null;
|
|
|
|
final public function setTestStaticToken($token)
|
|
{
|
|
$this->testStaticToken = (string) $token;
|
|
}
|
|
}
|