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126 lines
3.2 KiB
PHP
126 lines
3.2 KiB
PHP
<?php
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/**
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* a PHP client library for pubsubhubbub.
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*
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* @link https://github.com/pubsubhubbub/
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*
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* @author Josh Fraser | joshfraser.com | josh@eventvue.com
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* @license Apache License 2.0
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*/
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namespace pubsubhubbub\publisher;
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use InvalidArgumentException;
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class Publisher
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{
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/**
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* @var string
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*/
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protected $hub_url;
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/**
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* @var string
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*/
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protected $last_response;
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/**
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* Create a new Publisher.
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*
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* @param string $hub_url
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*/
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public function __construct($hub_url)
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{
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if (! isset($hub_url)) {
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throw new InvalidArgumentException('Please specify a hub url');
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}
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if (! preg_match('|^https?://|i', $hub_url)) {
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throw new InvalidArgumentException('The specified hub url does not appear to be valid: ' . $hub_url);
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}
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$this->hub_url = $hub_url;
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}
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/**
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* Accepts either a single url or an array of urls.
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*
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* @param string|array $topic_urls
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* @param callable $http_function
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*
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* @return mixed
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*/
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public function publish_update($topic_urls, $http_function = false)
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{
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if (! isset($topic_urls)) {
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throw new InvalidArgumentException('Please specify a topic url');
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}
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// check that we're working with an array
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if (! is_array($topic_urls)) {
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$topic_urls = [$topic_urls];
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}
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// set the mode to publish
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$post_string = 'hub.mode=publish';
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// loop through each topic url
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foreach ($topic_urls as $topic_url) {
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// lightweight check that we're actually working w/ a valid url
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if (! preg_match('|^https?://|i', $topic_url)) {
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throw new InvalidArgumentException('The specified topic url does not appear to be valid: ' . $topic_url);
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}
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// append the topic url parameters
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$post_string .= '&hub.url=' . urlencode($topic_url);
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}
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// make the http post request and return true/false
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// easy to over-write to use your own http function
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if ($http_function) {
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return $http_function($this->hub_url, $post_string);
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}
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return $this->http_post($this->hub_url, $post_string);
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}
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/**
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* Returns any error message from the latest request.
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*
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* @return string
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*/
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public function last_response()
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{
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return $this->last_response;
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}
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/**
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* Default http function that uses curl to post to the hub endpoint.
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*
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* @param string $url
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* @param string $post_string
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*
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* @return bool
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*/
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private function http_post($url, $post_string)
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{
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// add any additional curl options here
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$options = [
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CURLOPT_URL => $url,
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CURLOPT_POST => true,
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CURLOPT_POSTFIELDS => $post_string,
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CURLOPT_USERAGENT => 'PubSubHubbub-Publisher-PHP/1.0',
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];
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$ch = curl_init();
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curl_setopt_array($ch, $options);
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$response = curl_exec($ch);
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$this->last_response = $response;
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$info = curl_getinfo($ch);
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curl_close($ch);
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return $info['http_code'] == 204;
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}
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}
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