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- <?php
- namespace App\Util\ActivityPub;
- use DB, Cache, Purify, Storage, Request, Validator;
- use App\{
- Activity,
- Follower,
- Like,
- Media,
- Notification,
- Profile,
- Status
- };
- use Zttp\Zttp;
- use Carbon\Carbon;
- use GuzzleHttp\Client;
- use Illuminate\Http\File;
- use Illuminate\Validation\Rule;
- use App\Jobs\AvatarPipeline\CreateAvatar;
- use App\Jobs\RemoteFollowPipeline\RemoteFollowImportRecent;
- use App\Jobs\ImageOptimizePipeline\{ImageOptimize,ImageThumbnail};
- use App\Jobs\StatusPipeline\NewStatusPipeline;
- use App\Util\ActivityPub\HttpSignature;
- use Illuminate\Support\Str;
- use App\Services\ActivityPubFetchService;
- use App\Services\ActivityPubDeliveryService;
- use App\Services\MediaPathService;
- use App\Services\MediaStorageService;
- use App\Jobs\MediaPipeline\MediaStoragePipeline;
- use App\Jobs\AvatarPipeline\RemoteAvatarFetch;
- class Helpers {
- public static function validateObject($data)
- {
- $verbs = ['Create', 'Announce', 'Like', 'Follow', 'Delete', 'Accept', 'Reject', 'Undo', 'Tombstone'];
- $valid = Validator::make($data, [
- 'type' => [
- 'required',
- 'string',
- Rule::in($verbs)
- ],
- 'id' => 'required|string',
- 'actor' => 'required|string|url',
- 'object' => 'required',
- 'object.type' => 'required_if:type,Create',
- 'object.attributedTo' => 'required_if:type,Create|url',
- 'published' => 'required_if:type,Create|date'
- ])->passes();
- return $valid;
- }
- public static function verifyAttachments($data)
- {
- if(!isset($data['object']) || empty($data['object'])) {
- $data = ['object'=>$data];
- }
- $activity = $data['object'];
- $mimeTypes = explode(',', config('pixelfed.media_types'));
- $mediaTypes = in_array('video/mp4', $mimeTypes) ? ['Document', 'Image', 'Video'] : ['Document', 'Image'];
- if(!isset($activity['attachment']) || empty($activity['attachment'])) {
- return false;
- }
- $attachment = $activity['attachment'];
- $valid = Validator::make($attachment, [
- '*.type' => [
- 'required',
- 'string',
- Rule::in($mediaTypes)
- ],
- '*.url' => 'required|url|max:255',
- '*.mediaType' => [
- 'required',
- 'string',
- Rule::in($mimeTypes)
- ],
- '*.name' => 'nullable|string|max:255'
- ])->passes();
- return $valid;
- }
- public static function normalizeAudience($data, $localOnly = true)
- {
- if(!isset($data['to'])) {
- return;
- }
- $audience = [];
- $audience['to'] = [];
- $audience['cc'] = [];
- $scope = 'private';
- if(is_array($data['to']) && !empty($data['to'])) {
- foreach ($data['to'] as $to) {
- if($to == 'https://www.w3.org/ns/activitystreams#Public') {
- $scope = 'public';
- continue;
- }
- $url = $localOnly ? self::validateLocalUrl($to) : self::validateUrl($to);
- if($url != false) {
- array_push($audience['to'], $url);
- }
- }
- }
- if(is_array($data['cc']) && !empty($data['cc'])) {
- foreach ($data['cc'] as $cc) {
- if($cc == 'https://www.w3.org/ns/activitystreams#Public') {
- $scope = 'unlisted';
- continue;
- }
- $url = $localOnly ? self::validateLocalUrl($cc) : self::validateUrl($cc);
- if($url != false) {
- array_push($audience['cc'], $url);
- }
- }
- }
- $audience['scope'] = $scope;
- return $audience;
- }
- public static function userInAudience($profile, $data)
- {
- $audience = self::normalizeAudience($data);
- $url = $profile->permalink();
- return in_array($url, $audience['to']) || in_array($url, $audience['cc']);
- }
- public static function validateUrl($url)
- {
- if(is_array($url)) {
- $url = $url[0];
- }
- $hash = hash('sha256', $url);
- $key = "helpers:url:valid:sha256-{$hash}";
- $ttl = now()->addMinutes(5);
- $valid = Cache::remember($key, $ttl, function() use($url) {
- $localhosts = [
- '127.0.0.1', 'localhost', '::1'
- ];
- if(mb_substr($url, 0, 8) !== 'https://') {
- return false;
- }
- $valid = filter_var($url, FILTER_VALIDATE_URL);
- if(!$valid) {
- return false;
- }
- $host = parse_url($valid, PHP_URL_HOST);
- if(count(dns_get_record($host, DNS_A | DNS_AAAA)) == 0) {
- return false;
- }
- if(config('costar.enabled') == true) {
- if(
- (config('costar.domain.block') != null && Str::contains($host, config('costar.domain.block')) == true) ||
- (config('costar.actor.block') != null && in_array($url, config('costar.actor.block')) == true)
- ) {
- return false;
- }
- }
- if(in_array($host, $localhosts)) {
- return false;
- }
- return $url;
- });
- return $valid;
- }
- public static function validateLocalUrl($url)
- {
- $url = self::validateUrl($url);
- if($url == true) {
- $domain = config('pixelfed.domain.app');
- $host = parse_url($url, PHP_URL_HOST);
- $url = $domain === $host ? $url : false;
- return $url;
- }
- return false;
- }
- public static function zttpUserAgent()
- {
- $version = config('pixelfed.version');
- $url = config('app.url');
- return [
- 'Accept' => 'application/activity+json',
- 'User-Agent' => "(Pixelfed/{$version}; +{$url})",
- ];
- }
- public static function fetchFromUrl($url = false)
- {
- if(self::validateUrl($url) == false) {
- return;
- }
- $hash = hash('sha256', $url);
- $key = "helpers:url:fetcher:sha256-{$hash}";
- $ttl = now()->addMinutes(5);
- return Cache::remember($key, $ttl, function() use($url) {
- $res = ActivityPubFetchService::get($url);
- $res = json_decode($res, true, 8);
- if(json_last_error() == JSON_ERROR_NONE) {
- return $res;
- } else {
- return false;
- }
- });
- }
- public static function fetchProfileFromUrl($url)
- {
- return self::fetchFromUrl($url);
- }
- public static function statusFirstOrFetch($url, $replyTo = false)
- {
- $url = self::validateUrl($url);
- if($url == false) {
- return;
- }
- $host = parse_url($url, PHP_URL_HOST);
- $local = config('pixelfed.domain.app') == $host ? true : false;
- if($local) {
- $id = (int) last(explode('/', $url));
- return Status::whereNotIn('scope', ['draft','archived'])->findOrFail($id);
- }
- $cached = Status::whereNotIn('scope', ['draft','archived'])
- ->whereUri($url)
- ->orWhere('object_url', $url)
- ->first();
- if($cached) {
- return $cached;
- }
- $res = self::fetchFromUrl($url);
-
- if(!$res || empty($res)) {
- return;
- }
- if(isset($res['object'])) {
- $activity = $res;
- } else {
- $activity = ['object' => $res];
- }
- $scope = 'private';
-
- $cw = isset($res['sensitive']) ? (bool) $res['sensitive'] : false;
- if(isset($res['to']) == true) {
- if(is_array($res['to']) && in_array('https://www.w3.org/ns/activitystreams#Public', $res['to'])) {
- $scope = 'public';
- }
- if(is_string($res['to']) && 'https://www.w3.org/ns/activitystreams#Public' == $res['to']) {
- $scope = 'public';
- }
- }
- if(isset($res['cc']) == true) {
- if(is_array($res['cc']) && in_array('https://www.w3.org/ns/activitystreams#Public', $res['cc'])) {
- $scope = 'unlisted';
- }
- if(is_string($res['cc']) && 'https://www.w3.org/ns/activitystreams#Public' == $res['cc']) {
- $scope = 'unlisted';
- }
- }
- if(config('costar.enabled') == true) {
- $blockedKeywords = config('costar.keyword.block');
- if($blockedKeywords !== null) {
- $keywords = config('costar.keyword.block');
- foreach($keywords as $kw) {
- if(Str::contains($res['content'], $kw) == true) {
- return;
- }
- }
- }
- $unlisted = config('costar.domain.unlisted');
- if(in_array(parse_url($url, PHP_URL_HOST), $unlisted) == true) {
- $unlisted = true;
- $scope = 'unlisted';
- } else {
- $unlisted = false;
- }
- $cwDomains = config('costar.domain.cw');
- if(in_array(parse_url($url, PHP_URL_HOST), $cwDomains) == true) {
- $cw = true;
- }
- }
- $id = isset($res['id']) ? $res['id'] : $url;
- $idDomain = parse_url($id, PHP_URL_HOST);
- $urlDomain = parse_url($url, PHP_URL_HOST);
- if(!self::validateUrl($id)) {
- return;
- }
- if(isset($activity['object']['attributedTo'])) {
- $actorDomain = parse_url($activity['object']['attributedTo'], PHP_URL_HOST);
- if(!self::validateUrl($activity['object']['attributedTo']) ||
- $idDomain !== $actorDomain)
- {
- return;
- }
- }
- if(
- $idDomain !== $urlDomain ||
- $actorDomain !== $urlDomain
- ) {
- return;
- }
- $profile = self::profileFirstOrNew($activity['object']['attributedTo']);
- if(isset($activity['object']['inReplyTo']) && !empty($activity['object']['inReplyTo']) && $replyTo == true) {
- $reply_to = self::statusFirstOrFetch($activity['object']['inReplyTo'], false);
- $reply_to = optional($reply_to)->id;
- } else {
- $reply_to = null;
- }
- $ts = is_array($res['published']) ? $res['published'][0] : $res['published'];
- $status = DB::transaction(function() use($profile, $res, $url, $ts, $reply_to, $cw, $scope, $id) {
- $status = new Status;
- $status->profile_id = $profile->id;
- $status->url = isset($res['url']) ? $res['url'] : $url;
- $status->uri = isset($res['url']) ? $res['url'] : $url;
- $status->object_url = $id;
- $status->caption = strip_tags($res['content']);
- $status->rendered = Purify::clean($res['content']);
- $status->created_at = Carbon::parse($ts);
- $status->in_reply_to_id = $reply_to;
- $status->local = false;
- $status->is_nsfw = $cw;
- $status->scope = $scope;
- $status->visibility = $scope;
- $status->cw_summary = $cw == true && isset($res['summary']) ?
- Purify::clean(strip_tags($res['summary'])) : null;
- $status->save();
- if($reply_to == null) {
- self::importNoteAttachment($res, $status);
- }
- return $status;
- });
- return $status;
- }
- public static function statusFetch($url)
- {
- return self::statusFirstOrFetch($url);
- }
- public static function importNoteAttachment($data, Status $status)
- {
- if(self::verifyAttachments($data) == false) {
- return;
- }
- $attachments = isset($data['object']) ? $data['object']['attachment'] : $data['attachment'];
- $user = $status->profile;
- $storagePath = MediaPathService::get($user, 2);
- $allowed = explode(',', config('pixelfed.media_types'));
- foreach($attachments as $media) {
- $type = $media['mediaType'];
- $url = $media['url'];
- $blurhash = isset($media['blurhash']) ? $media['blurhash'] : null;
- $valid = self::validateUrl($url);
- if(in_array($type, $allowed) == false || $valid == false) {
- continue;
- }
- $media = new Media();
- $media->blurhash = $blurhash;
- $media->remote_media = true;
- $media->status_id = $status->id;
- $media->profile_id = $status->profile_id;
- $media->user_id = null;
- $media->media_path = $url;
- $media->remote_url = $url;
- $media->mime = $type;
- $media->version = 3;
- $media->save();
- if(config('pixelfed.cloud_storage') == true) {
- MediaStoragePipeline::dispatch($media);
- }
- }
-
- $status->viewType();
- return;
- }
- public static function profileFirstOrNew($url, $runJobs = false)
- {
- $url = self::validateUrl($url);
- if($url == false || strlen($url) > 190) {
- return;
- }
- $hash = base64_encode($url);
- $key = 'ap:profile:by_url:' . $hash;
- $ttl = now()->addMinutes(5);
- $profile = Cache::remember($key, $ttl, function() use($url, $runJobs) {
- $host = parse_url($url, PHP_URL_HOST);
- $local = config('pixelfed.domain.app') == $host ? true : false;
- if($local == true) {
- $id = last(explode('/', $url));
- return Profile::whereNull('status')
- ->whereNull('domain')
- ->whereUsername($id)
- ->firstOrFail();
- }
- $res = self::fetchProfileFromUrl($url);
- if(isset($res['id']) == false) {
- return;
- }
- $domain = parse_url($res['id'], PHP_URL_HOST);
- if(!isset($res['preferredUsername']) && !isset($res['nickname'])) {
- return;
- }
- $username = (string) Purify::clean($res['preferredUsername'] ?? $res['nickname']);
- if(empty($username)) {
- return;
- }
- $remoteUsername = $username;
- $webfinger = "@{$username}@{$domain}";
- abort_if(!self::validateUrl($res['inbox']), 400);
- abort_if(!self::validateUrl($res['id']), 400);
- $profile = Profile::whereRemoteUrl($res['id'])->first();
- if(!$profile) {
- $profile = DB::transaction(function() use($domain, $webfinger, $res, $runJobs) {
- $profile = new Profile();
- $profile->domain = strtolower($domain);
- $profile->username = strtolower(Purify::clean($webfinger));
- $profile->name = isset($res['name']) ? Purify::clean($res['name']) : 'user';
- $profile->bio = isset($res['summary']) ? Purify::clean($res['summary']) : null;
- $profile->sharedInbox = isset($res['endpoints']) && isset($res['endpoints']['sharedInbox']) ? $res['endpoints']['sharedInbox'] : null;
- $profile->inbox_url = strtolower($res['inbox']);
- $profile->outbox_url = strtolower($res['outbox']);
- $profile->remote_url = strtolower($res['id']);
- $profile->public_key = $res['publicKey']['publicKeyPem'];
- $profile->key_id = $res['publicKey']['id'];
- $profile->webfinger = strtolower(Purify::clean($webfinger));
- $profile->last_fetched_at = now();
- $profile->save();
- RemoteAvatarFetch::dispatch($profile);
- return $profile;
- });
- } else {
- // Update info after 24 hours
- if($profile->last_fetched_at == null ||
- $profile->last_fetched_at->lt(now()->subHours(24)) == true
- ) {
- $profile->name = isset($res['name']) ? Purify::clean($res['name']) : 'user';
- $profile->bio = isset($res['summary']) ? Purify::clean($res['summary']) : null;
- $profile->last_fetched_at = now();
- $profile->sharedInbox = isset($res['endpoints']) && isset($res['endpoints']['sharedInbox']) && Helpers::validateUrl($res['endpoints']['sharedInbox']) ? $res['endpoints']['sharedInbox'] : null;
- $profile->save();
- }
- RemoteAvatarFetch::dispatch($profile);
- }
- return $profile;
- });
- return $profile;
- }
- public static function profileFetch($url)
- {
- return self::profileFirstOrNew($url);
- }
- public static function sendSignedObject($profile, $url, $body)
- {
- ActivityPubDeliveryService::queue()
- ->from($profile)
- ->to($url)
- ->payload($body)
- ->send();
- }
- }
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