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: ' . $host);
  81                 }
  82
  83                 header('Vary: Accept', false);
  84
  85                 if ($name == User::getActorName()) {
  86                         $owner = User::getSystemAccount();
  87                         if (empty($owner)) {
  88                                 throw new NotFoundException('System account was not found. Please setup your Friendica installation properly.');
  89                         }
  90                         $this->printSystemJSON($owner);
  91                 } else {
  92                         $owner = User::getOwnerDataByNick($name);
  93                         if (empty($owner)) {
  94                                 DI::logger()->notice('No owner data for user id', ['uri' => $uri, 'name' => $name]);
  95                                 throw new NotFoundException('Owner was not found for user->uid=' . $name);
  96                         }
  97
  98                         $alias = str_replace('/profile/', '/~', $owner['url']);
  99
 100                         $avatar = Photo::selectFirst(['type'], ['uid' => $owner['uid'], 'profile' => true]);
 101                 }
 102
 103                 if (empty($avatar)) {
 104                         $avatar = ['type' => 'image/jpeg'];
 105                 }
 106
 107                 if ($mode == Response::TYPE_XML) {
 108                         $this->printXML($alias, $owner, $avatar);
 109                 } else {
 110                         $this->printJSON($alias, $owner, $avatar);
 111                 }
 112         }
 113
 114         private function printSystemJSON(array $owner)
 115         {
 116                 $baseURL = (string)$this->baseUrl;
 117                 $json = [
 118                         'subject' => 'acct:' . $owner['addr'],
 119                         'aliases' => [$owner['url']],
 120                         'links'   => [
 121                                 [
 122                                         'rel'  => 'http://webfinger.net/rel/profile-page',
 123                                         'type' => 'text/html',
 124                                         'href' => $owner['url'],
 125                                 ],
 126                                 [
 127                                         'rel'  => 'self',
 128                                         'type' => 'application/activity+json',
 129                                         'href' => $owner['url'],
 130                                 ],
 131                                 [
 132                                         'rel'      => 'http://ostatus.org/schema/1.0/subscribe',
 133                                         'template' => $baseURL . '/contact/follow?url={uri}',
 134                                 ],
 135                                 [
 136                                         'rel'  => ActivityNamespace::FEED,
 137                                         'type' => 'application/atom+xml',
 138                                         'href' => $owner['poll'] ?? $baseURL,
 139                                 ],
 140                                 [
 141                                         'rel'  => 'salmon',
 142                                         'href' => $baseURL . '/salmon/' . $owner['nickname'],
 143                                 ],
 144                                 [
 145                                         'rel'  => 'http://microformats.org/profile/hcard',
 146                                         'type' => 'text/html',
 147                                         'href' => $baseURL . '/hcard/' . $owner['nickname'],
 148                                 ],
 149                                 [
 150                                         'rel'  => 'http://joindiaspora.com/seed_location',
 151                                         'type' => 'text/html',
 152                                         'href' => $baseURL,
 153                                 ],
 154                         ]
 155                 ];
 156                 header('Access-Control-Allow-Origin: *');
 157                 System::jsonExit($json, 'application/jrd+json; charset=utf-8');
 158         }
 159
 160         private function printJSON(string $alias, array $owner, array $avatar)
 161         {
 162                 $baseURL = (string)$this->baseUrl;
 163
 164                 $json = [
 165                         'subject' => 'acct:' . $owner['addr'],
 166                         'aliases' => [
 167                                 $alias,
 168                                 $owner['url'],
 169                         ],
 170                         'links'   => [
 171                                 [
 172                                         'rel'  => ActivityNamespace::DFRN ,
 173                                         'href' => $owner['url'],
 174                                 ],
 175                                 [
 176                                         'rel'  => ActivityNamespace::FEED,
 177                                         'type' => 'application/atom+xml',
 178                                         'href' => $owner['poll'],
 179                                 ],
 180                                 [
 181                                         'rel'  => 'http://webfinger.net/rel/profile-page',
 182                                         'type' => 'text/html',
 183                                         'href' => $owner['url'],
 184                                 ],
 185                                 [
 186                                         'rel'  => 'self',
 187                                         'type' => 'application/activity+json',
 188                                         'href' => $owner['url'],
 189                                 ],
 190                                 [
 191                                         'rel'  => 'http://microformats.org/profile/hcard',
 192                                         'type' => 'text/html',
 193                                         'href' => $baseURL . '/hcard/' . $owner['nickname'],
 194                                 ],
 195                                 [
 196                                         'rel'  => 'http://webfinger.net/rel/avatar',
 197                                         'type' => $avatar['type'],
 198                                         'href' => User::getAvatarUrl($owner),
 199                                 ],
 200                                 [
 201                                         'rel'  => 'http://joindiaspora.com/seed_location',
 202                                         'type' => 'text/html',
 203                                         'href' => $baseURL,
 204                                 ],
 205                                 [
 206                                         'rel'  => 'salmon',
 207                                         'href' => $baseURL . '/salmon/' . $owner['nickname'],
 208                                 ],
 209                                 [
 210                                         'rel'  => 'http://salmon-protocol.org/ns/salmon-replies',
 211                                         'href' => $baseURL . '/salmon/' . $owner['nickname'],
 212                                 ],
 213                                 [
 214                                         'rel'  => 'http://salmon-protocol.org/ns/salmon-mention',
 215                                         'href' => $baseURL . '/salmon/' . $owner['nickname'] . '/mention',
 216                                 ],
 217                                 [
 218                                         'rel'      => 'http://ostatus.org/schema/1.0/subscribe',
 219                                         'template' => $baseURL . '/contact/follow?url={uri}',
 220                                 ],
 221                                 [
 222                                         'rel'  => 'magic-public-key',
 223                                         'href' => 'data:application/magic-public-key,' . Salmon::salmonKey($owner['spubkey']),
 224                                 ],
 225                                 [
 226                                         'rel'  => 'http://purl.org/openwebauth/v1',
 227                                         'type' => 'application/x-zot+json',
 228                                         'href' => $baseURL . '/owa',
 229                                 ],
 230                         ],
 231                 ];
 232
 233                 header('Access-Control-Allow-Origin: *');
 234                 System::jsonExit($json, 'application/jrd+json; charset=utf-8');
 235         }
 236
 237         private function printXML(string $alias, array $owner, array $avatar)
 238         {
 239                 $baseURL = (string)$this->baseUrl;
 240
 241                 $xmlString = XML::fromArray([
 242                         'XRD' => [
 243                                 '@attributes' => [
 244                                         'xmlns'    => 'http://docs.oasis-open.org/ns/xri/xrd-1.0',
 245                                 ],
 246                                 'Subject' => 'acct:' . $owner['addr'],
 247                                 '1:Alias' => $owner['url'],
 248                                 '2:Alias' => $alias,
 249                                 '1:link' => [
 250                                         '@attributes' => [
 251                                                 'rel'  => 'http://purl.org/macgirvin/dfrn/1.0',
 252                                                 'href' => $owner['url']
 253                                         ]
 254                                 ],
 255                                 '2:link' => [
 256                                         '@attributes' => [
 257                                                 'rel'  => 'http://schemas.google.com/g/2010#updates-from',
 258                                                 'type' => 'application/atom+xml',
 259                                                 'href' => $owner['poll']
 260                                         ]
 261                                 ],
 262                                 '3:link' => [
 263                                         '@attributes' => [
 264                                                 'rel'  => 'http://webfinger.net/rel/profile-page',
 265                                                 'type' => 'text/html',
 266                                                 'href' => $owner['url']
 267                                         ]
 268                                 ],
 269                                 '4:link' => [
 270                                         '@attributes' => [
 271                                                 'rel'  => 'http://microformats.org/profile/hcard',
 272                                                 'type' => 'text/html',
 273                                                 'href' => $baseURL . '/hcard/' . $owner['nickname']
 274                                         ]
 275                                 ],
 276                                 '5:link' => [
 277                                         '@attributes' => [
 278                                                 'rel'  => 'http://webfinger.net/rel/avatar',
 279                                                 'type' => $avatar['type'],
 280                                                 'href' => User::getAvatarUrl($owner)
 281                                         ]
 282                                 ],
 283                                 '6:link' => [
 284                                         '@attributes' => [
 285                                                 'rel'  => 'http://joindiaspora.com/seed_location',
 286                                                 'type' => 'text/html',
 287                                                 'href' => $baseURL
 288                                         ]
 289                                 ],
 290                                 '7:link' => [
 291                                         '@attributes' => [
 292                                                 'rel'  => 'salmon',
 293                                                 'href' => $baseURL . '/salmon/' . $owner['nickname']
 294                                         ]
 295                                 ],
 296                                 '8:link' => [
 297                                         '@attributes' => [
 298                                                 'rel'  => 'http://salmon-protocol.org/ns/salmon-replies',
 299                                                 'href' => $baseURL . '/salmon/' . $owner['nickname']
 300                                         ]
 301                                 ],
 302                                 '9:link' => [
 303                                         '@attributes' => [
 304                                                 'rel'  => 'http://salmon-protocol.org/ns/salmon-mention',
 305                                                 'href' => $baseURL . '/salmon/' . $owner['nickname'] . '/mention'
 306                                         ]
 307                                 ],
 308                                 '10:link' => [
 309                                         '@attributes' => [
 310                                                 'rel'  => 'http://ostatus.org/schema/1.0/subscribe',
 311                                                 'template' => $baseURL . '/contact/follow?url={uri}'
 312                                         ]
 313                                 ],
 314                                 '11:link' => [
 315                                         '@attributes' => [
 316                                                 'rel'  => 'magic-public-key',
 317                                                 'href' => 'data:application/magic-public-key,' . Salmon::salmonKey($owner['spubkey'])
 318                                         ]
 319                                 ],
 320                                 '12:link' => [
 321                                         '@attributes' => [
 322                                                 'rel'  => 'http://purl.org/openwebauth/v1',
 323                                                 'type' => 'application/x-zot+json',
 324                                                 'href' => $baseURL . '/owa'
 325                                         ]
 326                                 ],
 327                         ],
 328                 ]);
 329
 330                 header('Access-Control-Allow-Origin: *');
 331                 System::httpExit($xmlString, Response::TYPE_XML, 'application/xrd+xml');
 332         }
 333 }