X-Git-Url: https://git.mxchange.org/?a=blobdiff_plain;f=mod%2Fpubsubhubbub.php;h=11fbf2cf5f3af52f7bc4919fbbb68e7776bc6178;hb=3fc5c1ad840f98926319478a855dab3686a0ace3;hp=d7b204e89c4f9622e081fd30507673eb729b94e2;hpb=4ae37c61966a7f4c055369ee8fd0d4bc20808fdb;p=friendica.git

diff --git a/mod/pubsubhubbub.php b/mod/pubsubhubbub.php
index d7b204e89c..11fbf2cf5f 100644
--- a/mod/pubsubhubbub.php
+++ b/mod/pubsubhubbub.php
@@ -2,13 +2,15 @@
 
 use Friendica\App;
 use Friendica\Core\Config;
+use Friendica\Core\Logger;
 use Friendica\Core\System;
 use Friendica\Database\DBA;
 use Friendica\Model\PushSubscriber;
 use Friendica\Util\Network;
+use Friendica\Util\Strings;
 
 function post_var($name) {
-	return (x($_POST, $name)) ? notags(trim($_POST[$name])) : '';
+	return !empty($_POST[$name]) ? Strings::escapeTags(trim($_POST[$name])) : '';
 }
 
 function pubsubhubbub_init(App $a) {
@@ -42,36 +44,38 @@ function pubsubhubbub_init(App $a) {
 		} elseif ($hub_mode === 'unsubscribe') {
 			$subscribe = 0;
 		} else {
-			logger("Invalid hub_mode=$hub_mode, ignoring.");
+			Logger::log("Invalid hub_mode=$hub_mode, ignoring.");
 			System::httpExit(404);
 		}
 
-		logger("$hub_mode request from " . $_SERVER['REMOTE_ADDR']);
+		Logger::log("$hub_mode request from " . $_SERVER['REMOTE_ADDR']);
 
-		// get the nick name from the topic, a bit hacky but needed as a fallback
-		$nick = substr(strrchr($hub_topic, "/"), 1);
-
-		// Normally the url should now contain the nick name as last part of the url
 		if ($a->argc > 1) {
+			// Normally the url should now contain the nick name as last part of the url
 			$nick = $a->argv[1];
+		} else {
+			// Get the nick name from the topic as a fallback
+			$nick = $hub_topic;
 		}
+		// Extract nick name and strip any .atom extension
+		$nick = basename($nick, '.atom');
 
 		if (!$nick) {
-			logger('Bad hub_topic=$hub_topic, ignoring.');
+			Logger::log('Bad hub_topic=$hub_topic, ignoring.');
 			System::httpExit(404);
 		}
 
 		// fetch user from database given the nickname
 		$condition = ['nickname' => $nick, 'account_expired' => false, 'account_removed' => false];
-		$owner = DBA::selectFirst('user', ['uid', 'hidewall'], $condition);
+		$owner = DBA::selectFirst('user', ['uid', 'hidewall', 'nickname'], $condition);
 		if (!DBA::isResult($owner)) {
-			logger('Local account not found: ' . $nick . ' - topic: ' . $hub_topic . ' - callback: ' . $hub_callback);
+			Logger::log('Local account not found: ' . $nick . ' - topic: ' . $hub_topic . ' - callback: ' . $hub_callback);
 			System::httpExit(404);
 		}
 
 		// abort if user's wall is supposed to be private
 		if ($owner['hidewall']) {
-			logger('Local user ' . $nick . 'has chosen to hide wall, ignoring.');
+			Logger::log('Local user ' . $nick . 'has chosen to hide wall, ignoring.');
 			System::httpExit(403);
 		}
 
@@ -80,44 +84,51 @@ function pubsubhubbub_init(App $a) {
 			'pending' => false, 'self' => true];
 		$contact = DBA::selectFirst('contact', ['poll'], $condition);
 		if (!DBA::isResult($contact)) {
-			logger('Self contact for user ' . $owner['uid'] . ' not found.');
+			Logger::log('Self contact for user ' . $owner['uid'] . ' not found.');
 			System::httpExit(404);
 		}
 
 		// sanity check that topic URLs are the same
 		$hub_topic2 = str_replace('/feed/', '/dfrn_poll/', $hub_topic);
-		if (!link_compare($hub_topic, $contact['poll']) && !link_compare($hub_topic2, $contact['poll'])) {
-			logger('Hub topic ' . $hub_topic . ' != ' . $contact['poll']);
+		$self = System::baseUrl() . '/api/statuses/user_timeline/' . $owner['nickname'] . '.atom';
+
+		if (!Strings::compareLink($hub_topic, $contact['poll']) && !Strings::compareLink($hub_topic2, $contact['poll']) && !Strings::compareLink($hub_topic, $self)) {
+			Logger::log('Hub topic ' . $hub_topic . ' != ' . $contact['poll']);
 			System::httpExit(404);
 		}
 
 		// do subscriber verification according to the PuSH protocol
-		$hub_challenge = random_string(40);
-		$params = 'hub.mode=' .
-			($subscribe == 1 ? 'subscribe' : 'unsubscribe') .
-			'&hub.topic=' . urlencode($hub_topic) .
-			'&hub.challenge=' . $hub_challenge .
-			'&hub.lease_seconds=604800' .
-			'&hub.verify_token=' . $hub_verify_token;
-
-		// lease time is hard coded to one week (in seconds)
-		// we don't actually enforce the lease time because GNU
-		// Social/StatusNet doesn't honour it (yet)
-
-		$fetchResult = Network::fetchUrlFull($hub_callback . "?" . $params);
+		$hub_challenge = Strings::getRandomHex(40);
+
+		$params = http_build_query([
+			'hub.mode' => $subscribe == 1 ? 'subscribe' : 'unsubscribe',
+			'hub.topic' => $hub_topic,
+			'hub.challenge' => $hub_challenge,
+			'hub.verify_token' => $hub_verify_token,
+
+			// lease time is hard coded to one week (in seconds)
+			// we don't actually enforce the lease time because GNU
+			// Social/StatusNet doesn't honour it (yet)
+			'hub.lease_seconds' => 604800,
+		]);
+
+		$hub_callback = rtrim($hub_callback, ' ?&#');
+		$separator = parse_url($hub_callback, PHP_URL_QUERY) === null ? '?' : '&';
+
+		$fetchResult = Network::fetchUrlFull($hub_callback . $separator . $params);
 		$body = $fetchResult->getBody();
 		$ret = $fetchResult->getReturnCode();
 
 		// give up if the HTTP return code wasn't a success (2xx)
 		if ($ret < 200 || $ret > 299) {
-			logger("Subscriber verification for $hub_topic at $hub_callback returned $ret, ignoring.");
+			Logger::log("Subscriber verification for $hub_topic at $hub_callback returned $ret, ignoring.");
 			System::httpExit(404);
 		}
 
 		// check that the correct hub_challenge code was echoed back
 		if (trim($body) !== $hub_challenge) {
-			logger("Subscriber did not echo back hub.challenge, ignoring.");
-			logger("\"$hub_challenge\" != \"".trim($body)."\"");
+			Logger::log("Subscriber did not echo back hub.challenge, ignoring.");
+			Logger::log("\"$hub_challenge\" != \"".trim($body)."\"");
 			System::httpExit(404);
 		}