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1 | <?php |
2 | /** | |
3 | * a PHP client library for pubsubhubbub. | |
4 | * | |
5 | * @link https://github.com/pubsubhubbub/ | |
6 | * | |
7 | * @author Josh Fraser | joshfraser.com | josh@eventvue.com | |
8 | * @license Apache License 2.0 | |
9 | */ | |
10 | namespace pubsubhubbub\publisher; | |
11 | ||
12 | use InvalidArgumentException; | |
13 | ||
14 | class Publisher | |
15 | { | |
16 | /** | |
17 | * @var string | |
18 | */ | |
19 | protected $hub_url; | |
20 | ||
21 | /** | |
22 | * @var string | |
23 | */ | |
24 | protected $last_response; | |
25 | ||
26 | /** | |
27 | * Create a new Publisher. | |
28 | * | |
29 | * @param string $hub_url | |
30 | */ | |
31 | public function __construct($hub_url) | |
32 | { | |
33 | if (! isset($hub_url)) { | |
34 | throw new InvalidArgumentException('Please specify a hub url'); | |
35 | } | |
36 | ||
37 | if (! preg_match('|^https?://|i', $hub_url)) { | |
38 | throw new InvalidArgumentException('The specified hub url does not appear to be valid: ' . $hub_url); | |
39 | } | |
40 | ||
41 | $this->hub_url = $hub_url; | |
42 | } | |
43 | ||
44 | /** | |
45 | * Accepts either a single url or an array of urls. | |
46 | * | |
47 | * @param string|array $topic_urls | |
48 | * @param callable $http_function | |
49 | * | |
50 | * @return mixed | |
51 | */ | |
52 | public function publish_update($topic_urls, $http_function = false) | |
53 | { | |
54 | if (! isset($topic_urls)) { | |
55 | throw new InvalidArgumentException('Please specify a topic url'); | |
56 | } | |
57 | ||
58 | // check that we're working with an array | |
59 | if (! is_array($topic_urls)) { | |
60 | $topic_urls = [$topic_urls]; | |
61 | } | |
62 | ||
63 | // set the mode to publish | |
64 | $post_string = 'hub.mode=publish'; | |
65 | // loop through each topic url | |
66 | foreach ($topic_urls as $topic_url) { | |
67 | ||
68 | // lightweight check that we're actually working w/ a valid url | |
69 | if (! preg_match('|^https?://|i', $topic_url)) { | |
70 | throw new InvalidArgumentException('The specified topic url does not appear to be valid: ' . $topic_url); | |
71 | } | |
72 | ||
73 | // append the topic url parameters | |
74 | $post_string .= '&hub.url=' . urlencode($topic_url); | |
75 | } | |
76 | ||
77 | // make the http post request and return true/false | |
78 | // easy to over-write to use your own http function | |
79 | if ($http_function) { | |
80 | return $http_function($this->hub_url, $post_string); | |
81 | } | |
82 | ||
83 | return $this->http_post($this->hub_url, $post_string); | |
84 | } | |
85 | ||
86 | /** | |
87 | * Returns any error message from the latest request. | |
88 | * | |
89 | * @return string | |
90 | */ | |
91 | public function last_response() | |
92 | { | |
93 | return $this->last_response; | |
94 | } | |
95 | ||
96 | /** | |
97 | * Default http function that uses curl to post to the hub endpoint. | |
98 | * | |
99 | * @param string $url | |
100 | * @param string $post_string | |
101 | * | |
102 | * @return bool | |
103 | */ | |
104 | private function http_post($url, $post_string) | |
105 | { | |
106 | // add any additional curl options here | |
107 | $options = [ | |
108 | CURLOPT_URL => $url, | |
109 | CURLOPT_POST => true, | |
110 | CURLOPT_POSTFIELDS => $post_string, | |
111 | CURLOPT_USERAGENT => 'PubSubHubbub-Publisher-PHP/1.0', | |
112 | ]; | |
113 | ||
114 | $ch = curl_init(); | |
115 | curl_setopt_array($ch, $options); | |
116 | ||
117 | $response = curl_exec($ch); | |
118 | $this->last_response = $response; | |
119 | $info = curl_getinfo($ch); | |
120 | ||
121 | curl_close($ch); | |
122 | ||
123 | return $info['http_code'] == 204; | |
124 | } | |
125 | } |