1 files changed, 122 insertions, 0 deletions
diff --git a/plugins/OStatus/actions/pushcallback.php b/plugins/OStatus/actions/pushcallback.php
new file mode 100644
index 000000000..9a2067b8c
--- /dev/null
+++ b/plugins/OStatus/actions/pushcallback.php
@@ -0,0 +1,122 @@
+<?php
+/*
+ * StatusNet - the distributed open-source microblogging tool
+ * Copyright (C) 2009, StatusNet, Inc.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/**
+ * @package FeedSubPlugin
+ * @maintainer Brion Vibber <brion@status.net>
+ */
+
+if (!defined('STATUSNET') && !defined('LACONICA')) { exit(1); }
+
+
+class PushCallbackAction extends Action
+{
+    function handle()
+    {
+        StatusNet::setApi(true); // Minimize error messages to aid in debugging
+        parent::handle();
+        if ($_SERVER['REQUEST_METHOD'] == 'POST') {
+            $this->handlePost();
+        } else {
+            $this->handleGet();
+        }
+    }
+    
+    /**
+     * Handler for POST content updates from the hub
+     */
+    function handlePost()
+    {
+        $feedid = $this->arg('feed');
+        common_log(LOG_INFO, "POST for feed id $feedid");
+        if (!$feedid) {
+            throw new ServerException('Empty or invalid feed id', 400);
+        }
+
+        $feedsub = FeedSub::staticGet('id', $feedid);
+        if (!$feedsub) {
+            throw new ServerException('Unknown PuSH feed id ' . $feedid, 400);
+        }
+
+        $hmac = '';
+        if (isset($_SERVER['HTTP_X_HUB_SIGNATURE'])) {
+            $hmac = $_SERVER['HTTP_X_HUB_SIGNATURE'];
+        }
+
+        $post = file_get_contents('php://input');
+
+        // Queue this to a background process; we should return
+        // as quickly as possible from a distribution POST.
+        // If queues are disabled this'll process immediately.
+        $data = array('feedsub_id' => $feedsub->id,
+                      'post' => $post,
+                      'hmac' => $hmac);
+        $qm = QueueManager::get();
+        $qm->enqueue($data, 'pushin');
+    }
+    
+    /**
+     * Handler for GET verification requests from the hub.
+     */
+    function handleGet()
+    {
+        $mode = $this->arg('hub_mode');
+        $topic = $this->arg('hub_topic');
+        $challenge = $this->arg('hub_challenge');
+        $lease_seconds = $this->arg('hub_lease_seconds');
+        $verify_token = $this->arg('hub_verify_token');
+
+        if ($mode != 'subscribe' && $mode != 'unsubscribe') {
+            throw new ClientException("Bad hub.mode $mode", 404);
+        }
+
+        $feedsub = FeedSub::staticGet('uri', $topic);
+        if (!$feedsub) {
+            throw new ClientException("Bad hub.topic feed $topic", 404);
+        }
+
+        if ($feedsub->verify_token !== $verify_token) {
+            throw new ClientException("Bad hub.verify_token $token for $topic", 404);
+        }
+
+        if ($mode == 'subscribe') {
+            // We may get re-sub requests legitimately.
+            if ($feedsub->sub_state != 'subscribe' && $feedsub->sub_state != 'active') {
+                throw new ClientException("Unexpected subscribe request for $topic.", 404);
+            }
+        } else {
+            if ($feedsub->sub_state != 'unsubscribe') {
+                throw new ClientException("Unexpected unsubscribe request for $topic.", 404);
+            }
+        }
+
+        if ($mode == 'subscribe') {
+            if ($feedsub->sub_state == 'active') {
+                common_log(LOG_INFO, __METHOD__ . ': sub update confirmed');
+            } else {
+                common_log(LOG_INFO, __METHOD__ . ': sub confirmed');
+            }
+            $feedsub->confirmSubscribe($lease_seconds);
+        } else {
+            common_log(LOG_INFO, __METHOD__ . ": unsub confirmed; deleting sub record for $topic");
+            $feedsub->confirmUnsubscribe();
+        }
+        print $challenge;
+    }
+}