src/Module/Xrd.php

   1 <?php
   2 /**
   3  * @copyright Copyright (C) 2010-2023, the Friendica project
   4  *
   5  * @license GNU AGPL version 3 or any later version
   6  *
   7  * This program is free software: you can redistribute it and/or modify
   8  * it under the terms of the GNU Affero General Public License as
   9  * published by the Free Software Foundation, either version 3 of the
  10  * License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU Affero General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Affero General Public License
  18  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  19  *
  20  */
  21
  22 namespace Friendica\Module;
  23
  24 use Friendica\BaseModule;
  25 use Friendica\Core\System;
  26 use Friendica\DI;
  27 use Friendica\Model\Photo;
  28 use Friendica\Model\User;
  29 use Friendica\Network\HTTPException\NotFoundException;
  30 use Friendica\Protocol\ActivityNamespace;
  31 use Friendica\Protocol\Salmon;
  32 use Friendica\Util\XML;
  33
  34 /**
  35  * Prints responses to /.well-known/webfinger  or /xrd requests
  36  */
  37 class Xrd extends BaseModule
  38 {
  39         protected function rawContent(array $request = [])
  40         {
  41                 // @TODO: Replace with parameter from router
  42                 if (DI::args()->getArgv()[0] == 'xrd') {
  43                         if (empty($_GET['uri'])) {
  44                                 return;
  45                         }
  46
  47                         $uri = urldecode(trim($_GET['uri']));
  48                         if (strpos($_SERVER['HTTP_ACCEPT'] ?? '', 'application/jrd+json') !== false)  {
  49                                 $mode = Response::TYPE_JSON;
  50                         } else {
  51                                 $mode = Response::TYPE_XML;
  52                         }
  53                 } else {
  54                         if (empty($_GET['resource'])) {
  55                                 return;
  56                         }
  57
  58                         $uri = urldecode(trim($_GET['resource']));
  59                         if (strpos($_SERVER['HTTP_ACCEPT'] ?? '', 'application/xrd+xml') !== false)  {
  60                                 $mode = Response::TYPE_XML;
  61                         } else {
  62                                 $mode = Response::TYPE_JSON;
  63                         }
  64                 }
  65
  66                 if (substr($uri, 0, 4) === 'http') {
  67                         $name = ltrim(basename($uri), '~');
  68                         $host = parse_url($uri, PHP_URL_HOST);
  69                 } else {
  70                         $local = str_replace('acct:', '', $uri);
  71                         if (substr($local, 0, 2) == '//') {
  72                                 $local = substr($local, 2);
  73                         }
  74
  75                         list($name, $host) = explode('@', $local);
  76                 }
  77
  78                 if (!empty($host) && $host !== DI::baseUrl()->getHost()) {
  79                         DI::logger()->notice('Invalid host name for xrd query',['host' => $host, 'uri' => $uri]);
  80                         throw new NotFoundException('Invalid host name for xrd query: ' . $host);
  81                 }
  82
  83                 if ($name == User::getActorName()) {
  84                         $owner = User::getSystemAccount();
  85                         if (empty($owner)) {
  86                                 throw new NotFoundException('System account was not found. Please setup your Friendica installation properly.');
  87                         }
  88                         $this->printSystemJSON($owner);
  89                 } else {
  90                         $owner = User::getOwnerDataByNick($name);
  91                         if (empty($owner)) {
  92                                 DI::logger()->notice('No owner data for user id', ['uri' => $uri, 'name' => $name]);
  93                                 throw new NotFoundException('Owner was not found for user->uid=' . $name);
  94                         }
  95
  96                         $alias = str_replace('/profile/', '/~', $owner['url']);
  97
  98                         $avatar = Photo::selectFirst(['type'], ['uid' => $owner['uid'], 'profile' => true]);
  99                 }
 100
 101                 if (empty($avatar)) {
 102                         $avatar = ['type' => 'image/jpeg'];
 103                 }
 104
 105                 if ($mode == Response::TYPE_XML) {
 106                         $this->printXML($alias, $owner, $avatar);
 107                 } else {
 108                         $this->printJSON($alias, $owner, $avatar);
 109                 }
 110         }
 111
 112         private function printSystemJSON(array $owner)
 113         {
 114                 $baseURL = (string)$this->baseUrl;
 115                 $json = [
 116                         'subject' => 'acct:' . $owner['addr'],
 117                         'aliases' => [$owner['url']],
 118                         'links'   => [
 119                                 [
 120                                         'rel'  => 'http://webfinger.net/rel/profile-page',
 121                                         'type' => 'text/html',
 122                                         'href' => $owner['url'],
 123                                 ],
 124                                 [
 125                                         'rel'  => 'self',
 126                                         'type' => 'application/activity+json',
 127                                         'href' => $owner['url'],
 128                                 ],
 129                                 [
 130                                         'rel'      => 'http://ostatus.org/schema/1.0/subscribe',
 131                                         'template' => $baseURL . '/contact/follow?url={uri}',
 132                                 ],
 133                                 [
 134                                         'rel'  => ActivityNamespace::FEED,
 135                                         'type' => 'application/atom+xml',
 136                                         'href' => $owner['poll'] ?? $baseURL,
 137                                 ],
 138                                 [
 139                                         'rel'  => 'salmon',
 140                                         'href' => $baseURL . '/salmon/' . $owner['nickname'],
 141                                 ],
 142                                 [
 143                                         'rel'  => 'http://microformats.org/profile/hcard',
 144                                         'type' => 'text/html',
 145                                         'href' => $baseURL . '/hcard/' . $owner['nickname'],
 146                                 ],
 147                                 [
 148                                         'rel'  => 'http://joindiaspora.com/seed_location',
 149                                         'type' => 'text/html',
 150                                         'href' => $baseURL,
 151                                 ],
 152                         ]
 153                 ];
 154                 header('Access-Control-Allow-Origin: *');
 155                 System::jsonExit($json, 'application/jrd+json; charset=utf-8');
 156         }
 157
 158         private function printJSON(string $alias, array $owner, array $avatar)
 159         {
 160                 $baseURL = (string)$this->baseUrl;
 161
 162                 $json = [
 163                         'subject' => 'acct:' . $owner['addr'],
 164                         'aliases' => [
 165                                 $alias,
 166                                 $owner['url'],
 167                         ],
 168                         'links'   => [
 169                                 [
 170                                         'rel'  => ActivityNamespace::DFRN ,
 171                                         'href' => $owner['url'],
 172                                 ],
 173                                 [
 174                                         'rel'  => ActivityNamespace::FEED,
 175                                         'type' => 'application/atom+xml',
 176                                         'href' => $owner['poll'],
 177                                 ],
 178                                 [
 179                                         'rel'  => 'http://webfinger.net/rel/profile-page',
 180                                         'type' => 'text/html',
 181                                         'href' => $owner['url'],
 182                                 ],
 183                                 [
 184                                         'rel'  => 'self',
 185                                         'type' => 'application/activity+json',
 186                                         'href' => $owner['url'],
 187                                 ],
 188                                 [
 189                                         'rel'  => 'http://microformats.org/profile/hcard',
 190                                         'type' => 'text/html',
 191                                         'href' => $baseURL . '/hcard/' . $owner['nickname'],
 192                                 ],
 193                                 [
 194                                         'rel'  => 'http://webfinger.net/rel/avatar',
 195                                         'type' => $avatar['type'],
 196                                         'href' => User::getAvatarUrl($owner),
 197                                 ],
 198                                 [
 199                                         'rel'  => 'http://joindiaspora.com/seed_location',
 200                                         'type' => 'text/html',
 201                                         'href' => $baseURL,
 202                                 ],
 203                                 [
 204                                         'rel'  => 'salmon',
 205                                         'href' => $baseURL . '/salmon/' . $owner['nickname'],
 206                                 ],
 207                                 [
 208                                         'rel'  => 'http://salmon-protocol.org/ns/salmon-replies',
 209                                         'href' => $baseURL . '/salmon/' . $owner['nickname'],
 210                                 ],
 211                                 [
 212                                         'rel'  => 'http://salmon-protocol.org/ns/salmon-mention',
 213                                         'href' => $baseURL . '/salmon/' . $owner['nickname'] . '/mention',
 214                                 ],
 215                                 [
 216                                         'rel'      => 'http://ostatus.org/schema/1.0/subscribe',
 217                                         'template' => $baseURL . '/contact/follow?url={uri}',
 218                                 ],
 219                                 [
 220                                         'rel'  => 'magic-public-key',
 221                                         'href' => 'data:application/magic-public-key,' . Salmon::salmonKey($owner['spubkey']),
 222                                 ],
 223                                 [
 224                                         'rel'  => 'http://purl.org/openwebauth/v1',
 225                                         'type' => 'application/x-zot+json',
 226                                         'href' => $baseURL . '/owa',
 227                                 ],
 228                         ],
 229                 ];
 230
 231                 header('Access-Control-Allow-Origin: *');
 232                 System::jsonExit($json, 'application/jrd+json; charset=utf-8');
 233         }
 234
 235         private function printXML(string $alias, array $owner, array $avatar)
 236         {
 237                 $baseURL = (string)$this->baseUrl;
 238
 239                 $xmlString = XML::fromArray([
 240                         'XRD' => [
 241                                 '@attributes' => [
 242                                         'xmlns'    => 'http://docs.oasis-open.org/ns/xri/xrd-1.0',
 243                                 ],
 244                                 'Subject' => 'acct:' . $owner['addr'],
 245                                 '1:Alias' => $owner['url'],
 246                                 '2:Alias' => $alias,
 247                                 '1:link' => [
 248                                         '@attributes' => [
 249                                                 'rel'  => 'http://purl.org/macgirvin/dfrn/1.0',
 250                                                 'href' => $owner['url']
 251                                         ]
 252                                 ],
 253                                 '2:link' => [
 254                                         '@attributes' => [
 255                                                 'rel'  => 'http://schemas.google.com/g/2010#updates-from',
 256                                                 'type' => 'application/atom+xml',
 257                                                 'href' => $owner['poll']
 258                                         ]
 259                                 ],
 260                                 '3:link' => [
 261                                         '@attributes' => [
 262                                                 'rel'  => 'http://webfinger.net/rel/profile-page',
 263                                                 'type' => 'text/html',
 264                                                 'href' => $owner['url']
 265                                         ]
 266                                 ],
 267                                 '4:link' => [
 268                                         '@attributes' => [
 269                                                 'rel'  => 'http://microformats.org/profile/hcard',
 270                                                 'type' => 'text/html',
 271                                                 'href' => $baseURL . '/hcard/' . $owner['nickname']
 272                                         ]
 273                                 ],
 274                                 '5:link' => [
 275                                         '@attributes' => [
 276                                                 'rel'  => 'http://webfinger.net/rel/avatar',
 277                                                 'type' => $avatar['type'],
 278                                                 'href' => User::getAvatarUrl($owner)
 279                                         ]
 280                                 ],
 281                                 '6:link' => [
 282                                         '@attributes' => [
 283                                                 'rel'  => 'http://joindiaspora.com/seed_location',
 284                                                 'type' => 'text/html',
 285                                                 'href' => $baseURL
 286                                         ]
 287                                 ],
 288                                 '7:link' => [
 289                                         '@attributes' => [
 290                                                 'rel'  => 'salmon',
 291                                                 'href' => $baseURL . '/salmon/' . $owner['nickname']
 292                                         ]
 293                                 ],
 294                                 '8:link' => [
 295                                         '@attributes' => [
 296                                                 'rel'  => 'http://salmon-protocol.org/ns/salmon-replies',
 297                                                 'href' => $baseURL . '/salmon/' . $owner['nickname']
 298                                         ]
 299                                 ],
 300                                 '9:link' => [
 301                                         '@attributes' => [
 302                                                 'rel'  => 'http://salmon-protocol.org/ns/salmon-mention',
 303                                                 'href' => $baseURL . '/salmon/' . $owner['nickname'] . '/mention'
 304                                         ]
 305                                 ],
 306                                 '10:link' => [
 307                                         '@attributes' => [
 308                                                 'rel'  => 'http://ostatus.org/schema/1.0/subscribe',
 309                                                 'template' => $baseURL . '/contact/follow?url={uri}'
 310                                         ]
 311                                 ],
 312                                 '11:link' => [
 313                                         '@attributes' => [
 314                                                 'rel'  => 'magic-public-key',
 315                                                 'href' => 'data:application/magic-public-key,' . Salmon::salmonKey($owner['spubkey'])
 316                                         ]
 317                                 ],
 318                                 '12:link' => [
 319                                         '@attributes' => [
 320                                                 'rel'  => 'http://purl.org/openwebauth/v1',
 321                                                 'type' => 'application/x-zot+json',
 322                                                 'href' => $baseURL . '/owa'
 323                                         ]
 324                                 ],
 325                         ],
 326                 ]);
 327
 328                 header('Access-Control-Allow-Origin: *');
 329
 330                 System::httpExit($xmlString, Response::TYPE_XML, 'application/xrd+xml');
 331         }
 332 }