diff options
author | Anders Kaseorg <[email protected]> | 2017-01-20 15:59:48 -0500 |
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committer | Anders Kaseorg <[email protected]> | 2017-01-21 15:01:14 -0500 |
commit | becd215a75af95117b3bf35ca236e3dae5a124d6 (patch) | |
tree | c728a7e6706cc5417bfbfe733f6ebc756c4d17f7 /lib/pubsubhubbub/Subscriber.php | |
parent | 5ddc3e274df05d2c6b6943152063b23b99e90f5b (diff) |
lib: Upgrade php-subscriber from ??? to 1213f89 (2016-11-15)
https://github.com/pubsubhubbub/php-subscriber
Signed-off-by: Anders Kaseorg <[email protected]>
Diffstat (limited to 'lib/pubsubhubbub/Subscriber.php')
-rw-r--r-- | lib/pubsubhubbub/Subscriber.php | 210 |
1 files changed, 210 insertions, 0 deletions
diff --git a/lib/pubsubhubbub/Subscriber.php b/lib/pubsubhubbub/Subscriber.php new file mode 100644 index 000000000..5b980a111 --- /dev/null +++ b/lib/pubsubhubbub/Subscriber.php @@ -0,0 +1,210 @@ +<?php +/** + * A PHP client library for pubsubhubbub. + * + * @link http://code.google.com/p/pubsubhubbub/ + * + * @author Josh Fraser | joshfraser.com | [email protected] + * @license Apache License 2.0 + */ +namespace Pubsubhubbub\Subscriber; + +use InvalidArgumentException; + +class Subscriber +{ + /** + * Put your google key here. + * Required if you want to use the google feed API to lookup RSS feeds. + * + * @var string + */ + protected $google_key = ''; + + /** + * @var string + */ + protected $hub_url; + + /** + * @var string + */ + protected $callback_url; + + /** + * @var string + */ + protected $credentials; + + /** + * @var string accepted values are "async" and "sync" + */ + protected $verify = 'async'; + + /** + * @var string + */ + protected $verify_token; + + /** + * @var string + */ + protected $lease_seconds; + + /** + * Create a new Subscriber (credentials added for SuperFeedr support). + * + * @param string $hub_url + * @param string $callback_url + * @param string $credentials + */ + public function __construct($hub_url, $callback_url, $credentials = false) + { + if (! isset($hub_url)) { + throw new InvalidArgumentException('Please specify a hub url'); + } + + if (! preg_match('|^https?://|i', $hub_url)) { + throw new InvalidArgumentException('The specified hub url does not appear to be valid: ' . $hub_url); + } + + if (! isset($callback_url)) { + throw new InvalidArgumentException('Please specify a callback'); + } + + $this->hub_url = $hub_url; + $this->callback_url = $callback_url; + $this->credentials = $credentials; + } + + /** + * $use_regexp lets you choose whether to use google AJAX feed api (faster, but cached) or a regexp to read from site. + * + * @param string $url + * @param callable $http_function + * + * @return string + */ + public function find_feed($url, $http_function = false) + { + // using google feed API + $url = "http://ajax.googleapis.com/ajax/services/feed/lookup?key={$this->google_key}&v=1.0&q=" . urlencode($url); + // fetch the content + if ($http_function) { + $response = $http_function($url); + } else { + $response = $this->http($url); + } + + $result = json_decode($response, true); + $rss_url = $result['responseData']['url']; + + return $rss_url; + } + + /** + * Subscribe to a topic. + * + * @param string $topic_url + * @param callable $http_function + * + * @return mixed + */ + public function subscribe($topic_url, $http_function = false) + { + return $this->change_subscription('subscribe', $topic_url, $http_function); + } + + /** + * Unsubscribe from a topic. + * + * @param string $topic_url + * @param callable $http_function + * + * @return mixed + */ + public function unsubscribe($topic_url, $http_function = false) + { + return $this->change_subscription('unsubscribe', $topic_url, $http_function); + } + + /** + * Helper function since sub/unsub are handled the same way. + * + * @param string $mode + * @param string $topic_url + * @param callable $http_function + * + * @return mixed + */ + private function change_subscription($mode, $topic_url, $http_function = false) + { + if (! isset($topic_url)) { + throw new InvalidArgumentException('Please specify a topic url'); + } + + // lightweight check that we're actually working w/ a valid url + if (! preg_match('|^https?://|i', $topic_url)) { + throw new InvalidArgumentException('The specified topic url does not appear to be valid: ' . $topic_url); + } + + // set the mode subscribe/unsubscribe + $post_string = 'hub.mode=' . $mode; + $post_string .= '&hub.callback=' . urlencode($this->callback_url); + $post_string .= '&hub.verify=' . $this->verify; + $post_string .= '&hub.verify_token=' . $this->verify_token; + $post_string .= '&hub.lease_seconds=' . $this->lease_seconds; + + // append the topic url parameters + $post_string .= '&hub.topic=' . urlencode($topic_url); + + // make the http post request and return true/false + // easy to over-write to use your own http function + if ($http_function) { + return call_user_func_array($http_function, [$this->hub_url, $post_string]); + } + + return $this->http($this->hub_url, $post_string); + } + + /** + * Default http function that uses curl to post to the hub endpoint. + * + * @param string $url + * @param string $post_string + * + * @return mixed + */ + private function http($url, $post_string) + { + + // add any additional curl options here + $options = [ + CURLOPT_URL => $url, + CURLOPT_USERAGENT => 'PubSubHubbub-Subscriber-PHP/1.0', + CURLOPT_RETURNTRANSFER => true, + ]; + + if ($post_string) { + $options[CURLOPT_POST] = true; + $options[CURLOPT_POSTFIELDS] = $post_string; + } + + if ($this->credentials) { + $options[CURLOPT_USERPWD] = $this->credentials; + } + + $ch = curl_init(); + curl_setopt_array($ch, $options); + + $response = curl_exec($ch); + $info = curl_getinfo($ch); + + // all good -- anything in the 200 range + if (substr($info['http_code'], 0, 1) == '2') { + return $response; + } + + return false; + } +} |