Add InstancePipeline and NodeinfoService

app/Services/NodeinfoService.php

@@ -0,0 +1,76 @@
+<?php
+
+namespace App\Services;
+
+use Illuminate\Support\Str;
+use Illuminate\Support\Facades\Http;
+use Illuminate\Http\Client\RequestException;
+use Illuminate\Http\Client\ConnectionException;
+
+class NodeinfoService
+{
+    public static function get($domain)
+    {
+    	$version = config('pixelfed.version');
+		$appUrl = config('app.url');
+		$headers = [
+			'Accept'     => 'application/json',
+			'User-Agent' => "(Pixelfed/{$version}; +{$appUrl})",
+		];
+
+        $url = 'https://' . $domain;
+        $wk = $url . '/.well-known/nodeinfo';
+
+        try {
+            $res = Http::withHeaders($headers)
+            ->timeout(5)
+            ->get($wk);
+        } catch (RequestException $e) {
+            return false;
+        } catch (ConnectionException $e) {
+            return false;
+        } catch (\Exception $e) {
+            return false;
+        }
+
+        if(!$res) {
+            return false;
+        }
+
+        $json = $res->json();
+
+        if( !isset($json['links'])) {
+            return false;
+        }
+
+        if(is_array($json['links'])) {
+            if(isset($json['links']['href'])) {
+                $href = $json['links']['href'];
+            } else {
+                $href = $json['links'][0]['href'];
+            }
+        } else {
+            return false;
+        }
+
+        $domain = parse_url($url, PHP_URL_HOST);
+        $hrefDomain = parse_url($href, PHP_URL_HOST);
+
+        if($domain !== $hrefDomain) {
+            return 60;
+        }
+
+        try {
+            $res = Http::withHeaders($headers)
+            ->timeout(5)
+            ->get($href);
+        } catch (RequestException $e) {
+            return false;
+        } catch (ConnectionException $e) {
+            return false;
+        } catch (\Exception $e) {
+            return false;
+        }
+        return $res->json();
+    }
+}