forked from mirror/pixelfed
448 lines
12 KiB
PHP
448 lines
12 KiB
PHP
<?php
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namespace App\Util\ActivityPub;
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use DB, Cache, Purify, Storage, Request, Validator;
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use App\{
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Activity,
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Follower,
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Like,
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Media,
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Notification,
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Profile,
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Status
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};
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use Zttp\Zttp;
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use Carbon\Carbon;
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use GuzzleHttp\Client;
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use Illuminate\Http\File;
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use Illuminate\Validation\Rule;
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use App\Jobs\AvatarPipeline\CreateAvatar;
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use App\Jobs\RemoteFollowPipeline\RemoteFollowImportRecent;
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use App\Jobs\ImageOptimizePipeline\{ImageOptimize,ImageThumbnail};
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use App\Jobs\StatusPipeline\NewStatusPipeline;
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use App\Util\ActivityPub\HttpSignature;
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use Illuminate\Support\Str;
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use App\Services\ActivityPubDeliveryService;
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class Helpers {
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public static function validateObject($data)
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{
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$verbs = ['Create', 'Announce', 'Like', 'Follow', 'Delete', 'Accept', 'Reject', 'Undo', 'Tombstone'];
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$valid = Validator::make($data, [
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'type' => [
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'required',
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'string',
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Rule::in($verbs)
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],
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'id' => 'required|string',
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'actor' => 'required|string|url',
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'object' => 'required',
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'object.type' => 'required_if:type,Create',
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'object.attributedTo' => 'required_if:type,Create|url',
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'published' => 'required_if:type,Create|date'
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])->passes();
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return $valid;
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}
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public static function verifyAttachments($data)
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{
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if(!isset($data['object']) || empty($data['object'])) {
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$data = ['object'=>$data];
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}
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$activity = $data['object'];
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$mimeTypes = explode(',', config('pixelfed.media_types'));
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$mediaTypes = in_array('video/mp4', $mimeTypes) ? ['Document', 'Image', 'Video'] : ['Document', 'Image'];
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if(!isset($activity['attachment']) || empty($activity['attachment'])) {
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return false;
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}
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$attachment = $activity['attachment'];
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$valid = Validator::make($attachment, [
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'*.type' => [
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'required',
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'string',
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Rule::in($mediaTypes)
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],
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'*.url' => 'required|url|max:255',
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'*.mediaType' => [
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'required',
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'string',
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Rule::in($mimeTypes)
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],
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'*.name' => 'nullable|string|max:255'
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])->passes();
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return $valid;
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}
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public static function normalizeAudience($data, $localOnly = true)
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{
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if(!isset($data['to'])) {
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return;
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}
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$audience = [];
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$audience['to'] = [];
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$audience['cc'] = [];
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$scope = 'private';
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if(is_array($data['to']) && !empty($data['to'])) {
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foreach ($data['to'] as $to) {
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if($to == 'https://www.w3.org/ns/activitystreams#Public') {
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$scope = 'public';
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continue;
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}
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$url = $localOnly ? self::validateLocalUrl($to) : self::validateUrl($to);
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if($url != false) {
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array_push($audience['to'], $url);
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}
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}
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}
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if(is_array($data['cc']) && !empty($data['cc'])) {
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foreach ($data['cc'] as $cc) {
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if($cc == 'https://www.w3.org/ns/activitystreams#Public') {
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$scope = 'unlisted';
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continue;
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}
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$url = $localOnly ? self::validateLocalUrl($cc) : self::validateUrl($cc);
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if($url != false) {
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array_push($audience['cc'], $url);
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}
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}
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}
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$audience['scope'] = $scope;
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return $audience;
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}
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public static function userInAudience($profile, $data)
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{
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$audience = self::normalizeAudience($data);
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$url = $profile->permalink();
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return in_array($url, $audience['to']) || in_array($url, $audience['cc']);
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}
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public static function validateUrl($url)
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{
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$localhosts = [
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'127.0.0.1', 'localhost', '::1'
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];
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if(mb_substr($url, 0, 8) !== 'https://') {
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return false;
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}
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$valid = filter_var($url, FILTER_VALIDATE_URL);
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if(!$valid) {
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return false;
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}
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$host = parse_url($valid, PHP_URL_HOST);
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if(count(dns_get_record($host, DNS_A | DNS_AAAA)) == 0) {
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return false;
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}
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if(config('costar.enabled') == true) {
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if(
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(config('costar.domain.block') != null && Str::contains($host, config('costar.domain.block')) == true) ||
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(config('costar.actor.block') != null && in_array($url, config('costar.actor.block')) == true)
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) {
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return false;
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}
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}
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if(in_array($host, $localhosts)) {
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return false;
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}
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return $valid;
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}
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public static function validateLocalUrl($url)
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{
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$url = self::validateUrl($url);
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if($url == true) {
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$domain = config('pixelfed.domain.app');
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$host = parse_url($url, PHP_URL_HOST);
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$url = $domain === $host ? $url : false;
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return $url;
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}
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return false;
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}
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public static function zttpUserAgent()
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{
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return [
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'Accept' => 'application/activity+json',
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'User-Agent' => 'PixelfedBot - https://pixelfed.org',
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];
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}
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public static function fetchFromUrl($url)
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{
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$url = self::validateUrl($url);
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if($url == false) {
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return;
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}
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$res = Zttp::withHeaders(self::zttpUserAgent())->get($url);
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$res = json_decode($res->body(), true, 8);
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if(json_last_error() == JSON_ERROR_NONE) {
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return $res;
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} else {
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return false;
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}
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}
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public static function fetchProfileFromUrl($url)
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{
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return self::fetchFromUrl($url);
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}
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public static function statusFirstOrFetch($url, $replyTo = false)
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{
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$url = self::validateUrl($url);
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if($url == false) {
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return;
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}
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$host = parse_url($url, PHP_URL_HOST);
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$local = config('pixelfed.domain.app') == $host ? true : false;
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if($local) {
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$id = (int) last(explode('/', $url));
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return Status::findOrFail($id);
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} else {
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$cached = Status::whereUri($url)->orWhere('object_url', $url)->first();
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if($cached) {
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return $cached;
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}
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$res = self::fetchFromUrl($url);
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if(!$res || empty($res)) {
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return;
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}
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if(isset($res['object'])) {
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$activity = $res;
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} else {
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$activity = ['object' => $res];
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}
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if(isset($res['content']) == false) {
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abort(400, 'Invalid object');
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}
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$scope = 'private';
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$cw = isset($res['sensitive']) ? (bool) $res['sensitive'] : false;
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if(isset($res['to']) == true) {
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if(is_array($res['to']) && in_array('https://www.w3.org/ns/activitystreams#Public', $res['to'])) {
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$scope = 'public';
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}
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if(is_string($res['to']) && 'https://www.w3.org/ns/activitystreams#Public' == $res['to']) {
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$scope = 'public';
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}
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}
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if(isset($res['cc']) == true) {
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if(is_array($res['cc']) && in_array('https://www.w3.org/ns/activitystreams#Public', $res['cc'])) {
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$scope = 'unlisted';
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}
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if(is_string($res['cc']) && 'https://www.w3.org/ns/activitystreams#Public' == $res['cc']) {
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$scope = 'unlisted';
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}
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}
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if(config('costar.enabled') == true) {
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$blockedKeywords = config('costar.keyword.block');
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if($blockedKeywords !== null) {
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$keywords = config('costar.keyword.block');
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foreach($keywords as $kw) {
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if(Str::contains($res['content'], $kw) == true) {
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abort(400, 'Invalid object');
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}
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}
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}
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$unlisted = config('costar.domain.unlisted');
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if(in_array(parse_url($url, PHP_URL_HOST), $unlisted) == true) {
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$unlisted = true;
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$scope = 'unlisted';
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} else {
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$unlisted = false;
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}
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$cwDomains = config('costar.domain.cw');
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if(in_array(parse_url($url, PHP_URL_HOST), $cwDomains) == true) {
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$cw = true;
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}
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}
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if(!self::validateUrl($res['id']) ||
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!self::validateUrl($activity['object']['attributedTo'])
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) {
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abort(400, 'Invalid object url');
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}
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$idDomain = parse_url($res['id'], PHP_URL_HOST);
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$urlDomain = parse_url($url, PHP_URL_HOST);
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$actorDomain = parse_url($activity['object']['attributedTo'], PHP_URL_HOST);
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if(
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$idDomain !== $urlDomain ||
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$actorDomain !== $urlDomain ||
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$idDomain !== $actorDomain
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) {
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abort(400, 'Invalid object');
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}
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$profile = self::profileFirstOrNew($activity['object']['attributedTo']);
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if(isset($activity['object']['inReplyTo']) && !empty($activity['object']['inReplyTo']) && $replyTo == true) {
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$reply_to = self::statusFirstOrFetch($activity['object']['inReplyTo'], false);
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$reply_to = $reply_to->id;
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} else {
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$reply_to = null;
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}
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$ts = is_array($res['published']) ? $res['published'][0] : $res['published'];
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$status = DB::transaction(function() use($profile, $res, $url, $ts, $reply_to, $cw, $scope) {
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$status = new Status;
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$status->profile_id = $profile->id;
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$status->url = isset($res['url']) ? $res['url'] : $url;
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$status->uri = isset($res['url']) ? $res['url'] : $url;
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$status->object_url = isset($res['id']) ? $res['id'] : $url;
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$status->caption = strip_tags($res['content']);
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$status->rendered = Purify::clean($res['content']);
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$status->created_at = Carbon::parse($ts);
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$status->in_reply_to_id = $reply_to;
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$status->local = false;
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$status->is_nsfw = $cw;
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$status->scope = $scope;
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$status->visibility = $scope;
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$status->save();
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if($reply_to == null) {
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self::importNoteAttachment($res, $status);
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}
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return $status;
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});
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return $status;
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}
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}
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public static function statusFetch($url)
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{
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return self::statusFirstOrFetch($url);
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}
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public static function importNoteAttachment($data, Status $status)
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{
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if(self::verifyAttachments($data) == false) {
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return;
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}
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$attachments = isset($data['object']) ? $data['object']['attachment'] : $data['attachment'];
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$user = $status->profile;
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$monthHash = hash('sha1', date('Y').date('m'));
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$userHash = hash('sha1', $user->id.(string) $user->created_at);
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$storagePath = "public/m/{$monthHash}/{$userHash}";
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$allowed = explode(',', config('pixelfed.media_types'));
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foreach($attachments as $media) {
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$type = $media['mediaType'];
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$url = $media['url'];
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$valid = self::validateUrl($url);
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if(in_array($type, $allowed) == false || $valid == false) {
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continue;
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}
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$media = new Media();
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$media->remote_media = true;
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$media->status_id = $status->id;
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$media->profile_id = $status->profile_id;
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$media->user_id = null;
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$media->media_path = $url;
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$media->remote_url = $url;
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$media->mime = $type;
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$media->save();
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}
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$status->viewType();
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return;
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}
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public static function profileFirstOrNew($url, $runJobs = false)
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{
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$url = self::validateUrl($url);
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if($url == false) {
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abort(400, 'Invalid url');
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}
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$host = parse_url($url, PHP_URL_HOST);
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$local = config('pixelfed.domain.app') == $host ? true : false;
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if($local == true) {
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$id = last(explode('/', $url));
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return Profile::whereNull('status')
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->whereNull('domain')
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->whereUsername($id)
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->firstOrFail();
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}
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$res = self::fetchProfileFromUrl($url);
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if(isset($res['id']) == false) {
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return;
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}
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$domain = parse_url($res['id'], PHP_URL_HOST);
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$username = (string) Purify::clean($res['preferredUsername']);
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if(empty($username)) {
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return;
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}
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$remoteUsername = "@{$username}@{$domain}";
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abort_if(!self::validateUrl($res['inbox']), 400);
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abort_if(!self::validateUrl($res['id']), 400);
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$profile = Profile::whereRemoteUrl($res['id'])->first();
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if(!$profile) {
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$profile = new Profile();
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$profile->domain = $domain;
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$profile->username = (string) Purify::clean($remoteUsername);
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$profile->name = isset($res['name']) ? Purify::clean($res['name']) : 'user';
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$profile->bio = isset($res['summary']) ? Purify::clean($res['summary']) : null;
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$profile->sharedInbox = isset($res['endpoints']) && isset($res['endpoints']['sharedInbox']) ? $res['endpoints']['sharedInbox'] : null;
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$profile->inbox_url = $res['inbox'];
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$profile->outbox_url = $res['outbox'];
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$profile->remote_url = $res['id'];
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$profile->public_key = $res['publicKey']['publicKeyPem'];
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$profile->key_id = $res['publicKey']['id'];
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$profile->save();
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if($runJobs == true) {
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// RemoteFollowImportRecent::dispatch($res, $profile);
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CreateAvatar::dispatch($profile);
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}
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}
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return $profile;
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}
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public static function profileFetch($url)
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{
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return self::profileFirstOrNew($url);
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}
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public static function sendSignedObject($profile, $url, $body)
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{
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ActivityPubDeliveryService::queue()
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->from($profile)
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->to($url)
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->payload($body)
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->send();
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}
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}
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