Add async activitypub delivery with timeout and concurrency settings

app/Jobs/StatusPipeline/StatusActivityPubDeliver.php

@@ -13,6 +13,10 @@ use League\Fractal;
 use League\Fractal\Serializer\ArraySerializer;
 use App\Transformer\ActivityPub\Verb\CreateNote;
 use App\Util\ActivityPub\Helpers;
+use GuzzleHttp\Pool;
+use GuzzleHttp\Client;
+use GuzzleHttp\Promise;
+use App\Util\ActivityPub\HttpSignature;
 
 class StatusActivityPubDeliver implements ShouldQueue
 {
@@ -51,16 +55,45 @@ class StatusActivityPubDeliver implements ShouldQueue
         }
 
         $audience = $status->profile->getAudienceInbox();
+
+        if(empty($audience)) {
+            // Return on profiles with no remote followers
+            return;
+        }
+
         $profile = $status->profile;
 
         Cache::forget('status:transformer:media:attachments:'.$status->id);
+
         $fractal = new Fractal\Manager();
         $fractal->setSerializer(new ArraySerializer());
         $resource = new Fractal\Resource\Item($status, new CreateNote());
         $activity = $fractal->createData($resource)->toArray();
 
+        $payload = json_encode($activity);
+        
+        $client = new Client([
+            'timeout'  => config('pixelfed.ap_delivery_timeout')
+        ]);
+
+        $requests = function() use ($client, $activity, $profile) {
             foreach($audience as $url) {
-            Helpers::sendSignedObject($profile, $url, $activity);
+                $headers = HttpSignature::sign($profile, $url, $activity);
+                yield function() use ($client, $url, $activity) {
+                    return $client->requestAsync('POST', $url, $headers, $activity);
+                };
             }
+        };
+
+        $pool = new Pool($client, $requests, [
+            'concurrency' => config('pixelfed.ap_delivery_concurrency'),
+            'fulfilled' => function ($response, $index) {
+            },
+            'rejected' => function ($reason, $index) {
+            }
+        ]);
+        $promise = $pool->promise();
+
+        $promise->wait();
     }
 }

config/pixelfed.php

@@ -262,4 +262,6 @@ return [
     'enforce_account_limit' => env('LIMIT_ACCOUNT_SIZE', true),
     'ap_inbox' => env('ACTIVITYPUB_INBOX', false),
     'ap_shared' => env('ACTIVITYPUB_SHAREDINBOX', false),
+    'ap_delivery_timeout' => env('ACTIVITYPUB_DELIVERY_TIMEOUT', 2.0),
+    'ap_delivery_concurrency' => env('ACTIVITYPUB_DELIVERY_CONCURRENCY', 10)
 ];