Initial implementation of internal PuSH server in Friendica. It has been tested with GNU Social/StatusNet, and subscribe, unsubscribe and pushing new items seem to work.
This commit is contained in:
Mats Sjöberg
parent
19de78e511
commit
2859ce1483
2
boot.php
2
boot.php
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@ -14,7 +14,7 @@ require_once('include/features.php');
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define ( 'FRIENDICA_PLATFORM', 'Friendica');
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define ( 'FRIENDICA_VERSION', '3.2.1745' );
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define ( 'DFRN_PROTOCOL_VERSION', '2.23' );
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define ( 'DB_UPDATE_VERSION', 1165 );
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define ( 'DB_UPDATE_VERSION', 1166 );
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define ( 'EOL', "<br />\r\n" );
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define ( 'ATOM_TIME', 'Y-m-d\TH:i:s\Z' );
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@ -966,9 +966,18 @@ function notifier_run(&$argv, &$argc){
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$h = trim($h);
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if(! strlen($h))
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continue;
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if ($h === '[internal]') {
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// Set push flag for PuSH subscribers to this topic,
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// they will be notified in queue.php
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q("UPDATE `push_subscriber` SET `push` = 1 " .
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"WHERE `nickname` = '%s'", dbesc($owner['nickname']));
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} else {
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$params = 'hub.mode=publish&hub.url=' . urlencode( $a->get_baseurl() . '/dfrn_poll/' . $owner['nickname'] );
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post_url($h,$params);
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logger('pubsub: publish: ' . $h . ' ' . $params . ' returned ' . $a->get_curl_code());
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}
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if(count($hubs) > 1)
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sleep(7); // try and avoid multiple hubs responding at precisely the same time
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}
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@ -2,6 +2,51 @@
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require_once("boot.php");
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require_once('include/queue_fn.php');
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function handle_pubsubhubbub() {
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global $a, $db;
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logger('queue [pubsubhubbub]: start');
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// We'll push to each subscriber that has the push flag set,
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// i.e. there has been an update (set in notifier.php).
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$r = q("SELECT * FROM `push_subscriber` WHERE `push` = 1");
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foreach($r as $rr) {
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$params = get_feed_for($a, '', $rr['nickname'], $rr['last_update']);
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$hmac_sig = hash_hmac("sha1", $params, $rr['secret']);
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$headers = array("Content-type: application/atom+xml",
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sprintf("Link: <%s>;rel=hub," .
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"<%s>;rel=self",
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$a->get_baseurl() . '/pubsubhubbub',
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$rr['topic']),
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"X-Hub-Signature: sha1=" . $hmac_sig);
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logger('queue [pubsubhubbub]: POST', $headers);
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post_url($rr['callback_url'], $params, $headers);
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$ret = $a->get_curl_code();
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if ($ret >= 200 && $ret <= 299) {
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logger('queue [pubsubhubbub]: successfully pushed to ' .
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$rr['callback_url']);
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// here we should set push = 0 and update last_update to 'now'
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$date_now = datetime_convert('UTC','UTC','now','Y-m-d H:i:s');
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q("UPDATE `push_subscriber` SET `push` = 0, last_update = '%s' " .
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"WHERE id = %d",
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dbesc($date_now),
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intval($rr['id']));
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} else {
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logger('queue [pubsubhubbub]: error when pushing to ' .
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$rr['callback_url'] . 'HTTP: ', $ret);
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// here we should set update some retry counter
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// or cancel if counter is too high, remove subscription?
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}
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}
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}
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function queue_run(&$argv, &$argc){
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global $a, $db;
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@ -38,6 +83,8 @@ function queue_run(&$argv, &$argc){
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logger('queue: start');
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handle_pubsubhubbub();
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$interval = ((get_config('system','delivery_interval') === false) ? 2 : intval(get_config('system','delivery_interval')));
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$r = q("select * from deliverq where 1");
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@ -1554,7 +1554,7 @@ if(! function_exists('feed_hublinks')) {
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* @return string hub link xml elements
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*/
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function feed_hublinks() {
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$a = get_app();
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$hub = get_config('system','huburl');
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$hubxml = '';
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@ -1565,6 +1565,8 @@ function feed_hublinks() {
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$h = trim($h);
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if(! strlen($h))
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continue;
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if ($h === '[internal]')
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$h = $a->get_baseurl() . '/pubsubhubbub';
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$hubxml .= '<link rel="hub" href="' . xmlify($h) . '" />' . "\n" ;
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}
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}
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@ -0,0 +1,162 @@
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<?php
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function post_var($name) {
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return (x($_POST, $name)) ? notags(trim($_POST[$name])) : '';
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}
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function pubsubhubbub_init(&$a) {
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// PuSH subscription must be considered "public" so just block it
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// if public access isn't enabled.
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if (get_config('system', 'block_public')) {
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http_status_exit(403);
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}
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// Subscription request from subscriber
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// https://pubsubhubbub.googlecode.com/git/pubsubhubbub-core-0.4.html#anchor4
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// Example from GNU Social:
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// [hub_mode] => subscribe
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// [hub_callback] => http://status.local/main/push/callback/1
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// [hub_verify] => sync
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// [hub_verify_token] => af11...
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// [hub_secret] => af11...
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// [hub_topic] => http://friendica.local/dfrn_poll/sazius
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if($_SERVER['REQUEST_METHOD'] === 'POST') {
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$hub_mode = post_var('hub_mode');
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$hub_callback = post_var('hub_callback');
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$hub_verify = post_var('hub_verify');
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$hub_verify_token = post_var('hub_verify_token');
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$hub_secret = post_var('hub_secret');
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$hub_topic = post_var('hub_topic');
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// check for valid hub_mode
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if ($hub_mode === 'subscribe') {
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$subscribe = 1;
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} else if ($hub_mode === 'unsubscribe') {
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$subscribe = 0;
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} else {
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logger("pubsubhubbub: invalid hub_mode=$hub_mode, ignoring.");
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http_status_exit(404);
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}
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logger("pubsubhubbub: $hub_mode request from " .
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$_SERVER['REMOTE_ADDR']);
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// get the nick name from the topic, a bit hacky but needed
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$nick = substr(strrchr($hub_topic, "/"), 1);
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if (!$nick) {
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logger('pubsubhubbub: bad hub_topic=$hub_topic, ignoring.');
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http_status_exit(404);
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}
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// fetch user from database given the nickname
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$r = q("SELECT * FROM `user` WHERE `nickname` = '%s'" .
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" AND `account_expired` = 0 AND `account_removed` = 0 LIMIT 1",
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dbesc($nick));
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if(!count($r)) {
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logger('pubsubhubbub: local account not found: ' . $nick);
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http_status_exit(404);
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}
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$owner = $r[0];
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// abort if user's wall is supposed to be private
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if ($r[0]['hidewall']) {
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logger('pubsubhubbub: local user ' . $nick .
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'has chosen to hide wall, ignoring.');
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http_status_exit(403);
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}
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// get corresponding row from contact table
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$r = q("SELECT * FROM `contact` WHERE `uid` = %d AND `blocked` = 0" .
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" AND `pending` = 0 LIMIT 1",
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intval($owner['uid']));
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if(!count($r)) {
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logger('pubsubhubbub: contact not found.');
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http_status_exit(404);
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}
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$contact = $r[0];
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// sanity check that topic URLs are the same
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if(!link_compare($hub_topic, $contact['poll'])) {
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logger('pubsubhubbub: hub topic ' . $hub_topic . ' != ' .
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$contact['poll']);
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http_status_exit(404);
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}
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// do subscriber verification according to the PuSH protocol
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$hub_challenge = random_string(40);
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$params = 'hub.mode=' .
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($subscribe == 1 ? 'subscribe' : 'unsubscribe') .
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'&hub.topic=' . urlencode($hub_topic) .
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'&hub.challenge=' . $hub_challenge .
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'&hub.lease_seconds=604800' .
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'&hub.verify_token=' . $hub_verify_token;
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// lease time is hard coded to one week (in seconds)
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// we don't actually enforce the lease time because GNU
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// Social/StatusNet doesn't honour it (yet)
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$body = fetch_url($hub_callback . "?" . $params);
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$ret = $a->get_curl_code();
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// give up if the HTTP return code wasn't a success (2xx)
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if ($ret < 200 || $ret > 299) {
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logger("pubsubhubbub: subscriber verification at $hub_callback ".
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"returned $ret, ignoring.");
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http_status_exit(404);
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}
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// check that the correct hub_challenge code was echoed back
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if (trim($body) !== $hub_challenge) {
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logger("pubsubhubbub: subscriber did not echo back ".
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"hub.challenge, ignoring.");
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logger("\"$hub_challenge\" != \"".trim($body)."\"");
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http_status_exit(404);
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}
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// fetch the old subscription if it exists
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$r = q("SELECT * FROM `push_subscriber` WHERE `callback_url` = '%s'",
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dbesc($hub_callback));
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// delete old subscription if it exists
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q("DELETE FROM `push_subscriber` WHERE `callback_url` = '%s'",
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dbesc($hub_callback));
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if ($subscribe) {
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$last_update = datetime_convert('UTC','UTC','now','Y-m-d H:i:s');
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$push_flag = 0;
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// if we are just updating an old subscription, keep the
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// old values for push and last_update
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if (count($r)) {
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$last_update = $r[0]['last_update'];
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$push_flag = $r[0]['push'];
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}
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// subscribe means adding the row to the table
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q("INSERT INTO `push_subscriber` (`uid`, `callback_url`, " .
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"`topic`, `nickname`, `push`, `last_update`, `secret`) values " .
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"(%d, '%s', '%s', '%s', %d, '%s', '%s')",
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intval($owner['uid']),
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dbesc($hub_callback),
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dbesc($hub_topic),
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dbesc($nick),
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intval($push_flag),
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dbesc($last_update),
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dbesc($hub_secret));
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logger("pubsubhubbub: successfully subscribed [$hub_callback].");
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} else {
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logger("pubsubhubbub: successfully unsubscribed [$hub_callback].");
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// we do nothing here, since the row was already deleted
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}
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http_status_exit(202);
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}
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killme();
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}
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?>
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19
update.php
19
update.php
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@ -1,6 +1,6 @@
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<?php
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define( 'UPDATE_VERSION' , 1165 );
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define( 'UPDATE_VERSION' , 1166 );
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/**
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*
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@ -1509,3 +1509,20 @@ function update_1164() {
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return UPDATE_SUCCESS;
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}
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function update_1165() {
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$r = q("CREATE TABLE IF NOT EXISTS `push_subscriber` (
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`id` INT NOT NULL AUTO_INCREMENT PRIMARY KEY,
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`uid` INT NOT NULL,
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`callback_url` CHAR( 255 ) NOT NULL,
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`topic` CHAR( 255 ) NOT NULL,
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`nickname` CHAR( 255 ) NOT NULL,
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`push` INT NOT NULL,
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`last_update` DATETIME NOT NULL,
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`secret` CHAR( 255 ) NOT NULL
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) ENGINE = MYISAM DEFAULT CHARSET=utf8 ");
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if (!$r)
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return UPDATE_FAILED;
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return UPDATE_SUCCESS;
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}
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