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db90dfcb A |
1 | <?php |
2 | ||
3 | /** | |
4 | * PubSubHubbub plugin. | |
5 | * | |
6 | * PubSub is a protocol which fasten up RSS fetching: | |
7 | * - Every time a new link is posted, Shaarli notify the hub. | |
8 | * - The hub notify all feed subscribers that a new link has been posted. | |
a0ab3c3f | 9 | * - Subscribers retrieve the new link. |
db90dfcb A |
10 | */ |
11 | ||
12 | use pubsubhubbub\publisher\Publisher; | |
12266213 | 13 | use Shaarli\Config\ConfigManager; |
dfc650aa | 14 | use Shaarli\Feed\FeedBuilder; |
a932f486 | 15 | use Shaarli\Router; |
db90dfcb A |
16 | |
17 | /** | |
18 | * Plugin init function - set the hub to the default appspot one. | |
19 | * | |
20 | * @param ConfigManager $conf instance. | |
21 | */ | |
22 | function pubsubhubbub_init($conf) | |
23 | { | |
24 | $hub = $conf->get('plugins.PUBSUBHUB_URL'); | |
25 | if (empty($hub)) { | |
26 | // Default hub. | |
27 | $conf->set('plugins.PUBSUBHUB_URL', 'https://pubsubhubbub.appspot.com/'); | |
28 | } | |
29 | } | |
30 | ||
31 | ||
32 | /** | |
33 | * Render feed hook. | |
34 | * Adds the hub URL in ATOM and RSS feed. | |
35 | * | |
36 | * @param array $data Template data. | |
37 | * @param ConfigManager $conf instance. | |
38 | * | |
39 | * @return array updated template data. | |
40 | */ | |
41 | function hook_pubsubhubbub_render_feed($data, $conf) | |
42 | { | |
43 | $feedType = $data['_PAGE_'] == Router::$PAGE_FEED_RSS ? FeedBuilder::$FEED_RSS : FeedBuilder::$FEED_ATOM; | |
44 | $template = file_get_contents(PluginManager::$PLUGINS_PATH . '/pubsubhubbub/hub.'. $feedType .'.xml'); | |
45 | $data['feed_plugins_header'][] = sprintf($template, $conf->get('plugins.PUBSUBHUB_URL')); | |
46 | ||
47 | return $data; | |
48 | } | |
49 | ||
50 | /** | |
51 | * Save link hook. | |
52 | * Publish to the hub when a link is saved. | |
53 | * | |
54 | * @param array $data Template data. | |
55 | * @param ConfigManager $conf instance. | |
56 | * | |
57 | * @return array unaltered data. | |
58 | */ | |
59 | function hook_pubsubhubbub_save_link($data, $conf) | |
60 | { | |
61 | $feeds = array( | |
62 | index_url($_SERVER) .'?do=atom', | |
63 | index_url($_SERVER) .'?do=rss', | |
64 | ); | |
65 | ||
66 | $httpPost = function_exists('curl_version') ? false : 'nocurl_http_post'; | |
67 | try { | |
68 | $p = new Publisher($conf->get('plugins.PUBSUBHUB_URL')); | |
69 | $p->publish_update($feeds, $httpPost); | |
70 | } catch (Exception $e) { | |
12266213 | 71 | error_log(sprintf(t('Could not publish to PubSubHubbub: %s'), $e->getMessage())); |
db90dfcb A |
72 | } |
73 | ||
74 | return $data; | |
75 | } | |
76 | ||
77 | /** | |
78 | * Http function used to post to the hub endpoint without cURL extension. | |
79 | * | |
80 | * @param string $url Hub endpoint. | |
81 | * @param string $postString String to POST. | |
82 | * | |
83 | * @return bool | |
84 | * | |
85 | * @throws Exception An error occurred. | |
86 | */ | |
a0ab3c3f V |
87 | function nocurl_http_post($url, $postString) |
88 | { | |
db90dfcb A |
89 | $params = array('http' => array( |
90 | 'method' => 'POST', | |
91 | 'content' => $postString, | |
92 | 'user_agent' => 'PubSubHubbub-Publisher-PHP/1.0', | |
93 | )); | |
94 | ||
95 | $context = stream_context_create($params); | |
96 | $fp = @fopen($url, 'rb', false, $context); | |
97 | if (!$fp) { | |
12266213 | 98 | throw new Exception(sprintf(t('Could not post to %s'), $url)); |
db90dfcb A |
99 | } |
100 | $response = @stream_get_contents($fp); | |
101 | if ($response === false) { | |
12266213 | 102 | throw new Exception(sprintf(t('Bad response from the hub %s'), $url)); |
db90dfcb A |
103 | } |
104 | return $response; | |
105 | } | |
12266213 A |
106 | |
107 | /** | |
108 | * This function is never called, but contains translation calls for GNU gettext extraction. | |
109 | */ | |
110 | function pubsubhubbub_dummy_translation() | |
111 | { | |
112 | // meta | |
113 | t('Enable PubSubHubbub feed publishing.'); | |
114 | } |