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Issue 9303: Detect AP accesses as backend, prevent ping pong

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Michael 2020-10-02 09:31:39 +00:00
parent 97f07b7518
commit 73a7df85f7
3 changed files with 25 additions and 5 deletions
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15
src/Model/APContact.php
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@ -22,8 +22,11 @@
namespace Friendica\Model;
use Friendica\Content\Text\HTML;
use Friendica\Core\Cache\Duration;
use Friendica\Core\Logger;
use Friendica\Core\System;
use Friendica\Database\DBA;
use Friendica\DI;
use Friendica\Network\Probe;
use Friendica\Protocol\ActivityNamespace;
use Friendica\Protocol\ActivityPub;
@ -40,7 +43,7 @@ class APContact
* @param string $addr Address
* @return array webfinger data
*/
public static function fetchWebfingerData(string $addr)
private static function fetchWebfingerData(string $addr)
{
$addr_parts = explode('@', $addr);
if (count($addr_parts) != 2) {
@ -154,6 +157,16 @@ class APContact
return $fetched_contact;
}
// Detect multiple fast repeating request to the same address
// See https://github.com/friendica/friendica/issues/9303
$cachekey = 'apcontact:getByURL:' . $url;
$result = DI::cache()->get($cachekey);
if (!is_null($result)) {
Logger::notice('Multiple requests for the address', ['url' => $url, 'update' => $update, 'callstack' => System::callstack(20), 'result' => $result]);
} else {
DI::cache()->set($cachekey, System::callstack(20), Duration::FIVE_MINUTES);
}
$apcontact['url'] = $compacted['@id'];
$apcontact['uuid'] = JsonLD::fetchElement($compacted, 'diaspora:guid', '@value');
$apcontact['type'] = str_replace('as:', '', JsonLD::fetchElement($compacted, '@type'));