| 1 |
<?php |
| 2 |
/* |
| 3 |
Plugin Name: WebFinger |
| 4 |
Plugin URI: http://wordpress.org/extend/plugins/webfinger/ |
| 5 |
Description: WebFinger for WordPress |
| 6 |
Version: 3.0.0 |
| 7 |
Author: pfefferle |
| 8 |
Author URI: http://notizblog.org/ |
| 9 |
*/ |
| 10 |
|
| 11 |
// initialize plugin |
| 12 |
add_action('init', array( 'WebFingerPlugin', 'init' )); |
| 13 |
|
| 14 |
/** |
| 15 |
* webfinger |
| 16 |
* |
| 17 |
* @author Matthias Pfefferle |
| 18 |
* @author Will Norris |
| 19 |
*/ |
| 20 |
class WebFingerPlugin { |
| 21 |
|
| 22 |
/** |
| 23 |
* Initialize the plugin, registering WordPress hooks. |
| 24 |
*/ |
| 25 |
public static function init() { |
| 26 |
register_activation_hook(__FILE__, 'flush_rewrite_rules'); |
| 27 |
register_deactivation_hook(__FILE__, 'flush_rewrite_rules'); |
| 28 |
|
| 29 |
add_action('query_vars', array('WebFingerPlugin', 'query_vars')); |
| 30 |
add_action('parse_request', array('WebFingerPlugin', 'parse_request')); |
| 31 |
add_action('generate_rewrite_rules', array('WebFingerPlugin', 'rewrite_rules')); |
| 32 |
|
| 33 |
add_filter('webfinger_data', array('WebFingerPlugin', 'generate_user_data'), 10, 3); |
| 34 |
add_filter('webfinger_data', array('WebFingerPlugin', 'filter_by_rel'), 99, 1); |
| 35 |
|
| 36 |
// default output |
| 37 |
add_action('webfinger_render', array('WebFingerPlugin', 'render_jrd')); |
| 38 |
|
| 39 |
// support plugins pre 3.0.0 |
| 40 |
add_filter('webfinger_user_data', array('WebFingerPlugin', 'legacy_filter'), 10, 3); |
| 41 |
} |
| 42 |
|
| 43 |
/** |
| 44 |
* add query vars |
| 45 |
* |
| 46 |
* @param array $vars |
| 47 |
* @return array |
| 48 |
*/ |
| 49 |
public static function query_vars($vars) { |
| 50 |
$vars[] = 'well-known'; |
| 51 |
$vars[] = 'resource'; |
| 52 |
$vars[] = 'rel'; |
| 53 |
|
| 54 |
return $vars; |
| 55 |
} |
| 56 |
|
| 57 |
/** |
| 58 |
* add rewrite rules |
| 59 |
* |
| 60 |
* @param WP_Rewrite |
| 61 |
*/ |
| 62 |
public static function rewrite_rules( $wp_rewrite ) { |
| 63 |
$webfinger_rules = array( |
| 64 |
'.well-known/webfinger' => 'index.php?well-known=webfinger' |
| 65 |
); |
| 66 |
|
| 67 |
$wp_rewrite->rules = $webfinger_rules + $wp_rewrite->rules; |
| 68 |
} |
| 69 |
|
| 70 |
/** |
| 71 |
* parse the webfinger request and render the document. |
| 72 |
* |
| 73 |
* @param WP $wp WordPress request context |
| 74 |
* |
| 75 |
* @uses apply_filters() Calls 'webfinger' on webfinger data array |
| 76 |
* @uses do_action() Calls 'webfinger_render' to render webfinger data |
| 77 |
*/ |
| 78 |
public static function parse_request($wp) { |
| 79 |
// check if it is a webfinger request or not |
| 80 |
if (!array_key_exists('well-known', $wp->query_vars) || |
| 81 |
$wp->query_vars['well-known'] != 'webfinger') { |
| 82 |
return; |
| 83 |
} |
| 84 |
|
| 85 |
header('Access-Control-Allow-Origin: *'); |
| 86 |
|
| 87 |
// check if "resource" param exists |
| 88 |
if (!array_key_exists('resource', $wp->query_vars) || |
| 89 |
empty($wp->query_vars['resource'])) { |
| 90 |
status_header(400); |
| 91 |
header('Content-Type: text/plain; charset=' . get_bloginfo('charset'), true); |
| 92 |
echo "missing 'resource' parameter"; |
| 93 |
exit; |
| 94 |
} |
| 95 |
|
| 96 |
// filter webfinger array |
| 97 |
$webfinger = apply_filters('webfinger_data', array(), $wp->query_vars['resource']); |
| 98 |
|
| 99 |
// check if "user" exists |
| 100 |
if (empty($webfinger)) { |
| 101 |
status_header(404); |
| 102 |
header('Content-Type: text/plain; charset=' . get_bloginfo('charset'), true); |
| 103 |
echo "no data for resource '{$wp->query_vars['resource']}' found"; |
| 104 |
exit; |
| 105 |
} |
| 106 |
|
| 107 |
do_action('webfinger_render', $webfinger); |
| 108 |
|
| 109 |
// stop exactly here! |
| 110 |
exit; |
| 111 |
} |
| 112 |
|
| 113 |
/** |
| 114 |
* render the JRD representation of the webfinger resource. |
| 115 |
* |
| 116 |
* @param array $webfinger the webfinger data-array |
| 117 |
*/ |
| 118 |
public static function render_jrd($webfinger) { |
| 119 |
header('Content-Type: application/jrd+json; charset=' . get_bloginfo('charset'), true); |
| 120 |
|
| 121 |
echo json_encode($webfinger); |
| 122 |
exit; |
| 123 |
} |
| 124 |
|
| 125 |
/** |
| 126 |
* generates the webfinger base array |
| 127 |
* |
| 128 |
* @param array $webfinger the webfinger data-array |
| 129 |
* @param stdClass $user the WordPress user |
| 130 |
* @param string $resource the resource param |
| 131 |
* @return array the enriched webfinger data-array |
| 132 |
*/ |
| 133 |
public static function generate_user_data($webfinger, $resource) { |
| 134 |
// find matching user |
| 135 |
$user = self::get_user_by_uri($resource); |
| 136 |
|
| 137 |
if (!$user) { |
| 138 |
return $webfinger; |
| 139 |
} |
| 140 |
|
| 141 |
// generate "profile" url |
| 142 |
$url = get_author_posts_url($user->ID, $user->user_nicename); |
| 143 |
// generate default photo-url |
| 144 |
$photo = get_user_meta($user->ID, 'photo', true); |
| 145 |
if(!$photo) $photo = 'http://www.gravatar.com/avatar/'.md5($user->user_email); |
| 146 |
|
| 147 |
// generate default array |
| 148 |
$webfinger = array('subject' => self::get_user_resource($user->ID), |
| 149 |
'aliases' => self::get_user_resources($user->ID), |
| 150 |
'links' => array( |
| 151 |
array('rel' => 'http://webfinger.net/rel/profile-page', 'type' => 'text/html', 'href' => $url), |
| 152 |
array('rel' => 'http://webfinger.net/rel/avatar', 'href' => $photo) |
| 153 |
)); |
| 154 |
|
| 155 |
// add user_url if set |
| 156 |
if (isset($user->user_url) && !empty($user->user_url)) { |
| 157 |
$webfinger['links'][] = array('rel' => 'http://webfinger.net/rel/profile-page', 'type' => 'text/html', 'href' => $user->user_url); |
| 158 |
} |
| 159 |
|
| 160 |
return apply_filters('webfinger_user_data', $webfinger, $resource, $user); |
| 161 |
} |
| 162 |
|
| 163 |
/** |
| 164 |
* filters the webfinger array by request params like "rel" |
| 165 |
* |
| 166 |
* @link http://tools.ietf.org/html/rfc7033#section-4.3 |
| 167 |
* @param array $array |
| 168 |
* @param stdClass $user |
| 169 |
* @param array $queries |
| 170 |
* @return array |
| 171 |
*/ |
| 172 |
public static function filter_by_rel($webfinger) { |
| 173 |
// check if webfinger is empty or if "rel" |
| 174 |
// is set or if array has any "links" |
| 175 |
if (empty($webfinger) || |
| 176 |
!array_key_exists('rel', $_GET) || |
| 177 |
!isset($webfinger['links'])) { |
| 178 |
return $webfinger; |
| 179 |
} |
| 180 |
|
| 181 |
// explode the query-string by hand because php does not |
| 182 |
// support multiple queries with the same name |
| 183 |
$query = explode("&", $_SERVER['QUERY_STRING']); |
| 184 |
$rels = array(); |
| 185 |
|
| 186 |
foreach($query as $param) { |
| 187 |
$param = explode('=', $param); |
| 188 |
|
| 189 |
// check if query-string is valid and if it is a 'rel' |
| 190 |
if (isset($param[0], $param[1]) && |
| 191 |
$param[0] == 'rel' && |
| 192 |
!empty($param[1])) { |
| 193 |
$rels[] = urldecode(trim($param[1])); |
| 194 |
} |
| 195 |
} |
| 196 |
|
| 197 |
// check if there is something to filter |
| 198 |
if (empty($rels)) { |
| 199 |
return $webfinger; |
| 200 |
} |
| 201 |
|
| 202 |
// filter webfinger-array |
| 203 |
$links = array(); |
| 204 |
foreach ($webfinger['links'] as $link) { |
| 205 |
if (in_array($link["rel"], $rels)) { |
| 206 |
$links[] = $link; |
| 207 |
} |
| 208 |
} |
| 209 |
$webfinger['links'] = $links; |
| 210 |
|
| 211 |
// return only "links" with the matching rel-values |
| 212 |
return $webfinger; |
| 213 |
} |
| 214 |
|
| 215 |
/** |
| 216 |
* returns a Userobject |
| 217 |
* |
| 218 |
* @param string $uri |
| 219 |
* @return WP_User |
| 220 |
* @uses apply_filters() uses 'webfinger_user' to filter the |
| 221 |
* user and 'webfinger_user_query' to add custom query-params |
| 222 |
*/ |
| 223 |
private static function get_user_by_uri($uri) { |
| 224 |
$uri = urldecode($uri); |
| 225 |
|
| 226 |
if (!preg_match("/^([a-zA-Z^:]+):(.*)$/i", $uri, $match)) { |
| 227 |
// no valid scheme provided |
| 228 |
return null; |
| 229 |
} |
| 230 |
|
| 231 |
// extract the scheme |
| 232 |
$scheme = $match[1]; |
| 233 |
// extract the "host" |
| 234 |
$host = $match[2]; |
| 235 |
|
| 236 |
switch ($scheme) { |
| 237 |
// check urls |
| 238 |
case "http": |
| 239 |
case "https": |
| 240 |
// check if is the author url |
| 241 |
if ($author_id = url_to_authorid($uri)) { |
| 242 |
$args = array( |
| 243 |
'search' => $author_id, |
| 244 |
'search_columns' => array('ID'), |
| 245 |
'meta_compare' => '=', |
| 246 |
); |
| 247 |
// check other urls |
| 248 |
} else { |
| 249 |
// search url in user_url |
| 250 |
$args = array( |
| 251 |
'search' => $uri, |
| 252 |
'search_columns' => array('user_url'), |
| 253 |
'meta_compare' => '=', |
| 254 |
); |
| 255 |
} |
| 256 |
|
| 257 |
break; |
| 258 |
// check acct scheme |
| 259 |
case "acct": |
| 260 |
// get the identifier at the left of the '@' |
| 261 |
$parts = explode("@", $host); |
| 262 |
|
| 263 |
$args = array( |
| 264 |
'search' => $parts[0], |
| 265 |
'search_columns' => array('user_name', 'display_name', 'user_login'), |
| 266 |
'meta_compare' => '=', |
| 267 |
); |
| 268 |
break; |
| 269 |
// check mailto scheme |
| 270 |
case "mailto": |
| 271 |
$args = array( |
| 272 |
'search' => $host, |
| 273 |
'search_columns' => array('user_email'), |
| 274 |
'meta_compare' => '=', |
| 275 |
); |
| 276 |
break; |
| 277 |
// check xmpp/jabber schemes |
| 278 |
case "xmpp": |
| 279 |
case "urn:xmpp": |
| 280 |
$args = array( |
| 281 |
'meta_key' => 'jabber', |
| 282 |
'meta_value' => $host, |
| 283 |
'meta_compare' => '=', |
| 284 |
); |
| 285 |
break; |
| 286 |
// check Yahoo messenger schemes |
| 287 |
case "ymsgr": |
| 288 |
$args = array( |
| 289 |
'meta_key' => 'yim', |
| 290 |
'meta_value' => $host, |
| 291 |
'meta_compare' => '=', |
| 292 |
); |
| 293 |
break; |
| 294 |
// check AOL messenger schemes |
| 295 |
case "aim": |
| 296 |
$args = array( |
| 297 |
'meta_key' => 'aim', |
| 298 |
'meta_value' => $host, |
| 299 |
'meta_compare' => '=', |
| 300 |
); |
| 301 |
break; |
| 302 |
// check instant messaging schemes |
| 303 |
case "im": |
| 304 |
$args = array( |
| 305 |
'meta_query' => array( |
| 306 |
'relation' => 'OR', |
| 307 |
array( |
| 308 |
'key' => 'jabber', |
| 309 |
'value' => $host, |
| 310 |
'compare' => '=' |
| 311 |
), |
| 312 |
array( |
| 313 |
'key' => 'yim', |
| 314 |
'value' => $host, |
| 315 |
'compare' => '=' |
| 316 |
), |
| 317 |
array( |
| 318 |
'key' => 'aim', |
| 319 |
'value' => $host, |
| 320 |
'compare' => '=' |
| 321 |
) |
| 322 |
) |
| 323 |
); |
| 324 |
break; |
| 325 |
default: |
| 326 |
$args = array(); |
| 327 |
break; |
| 328 |
} |
| 329 |
|
| 330 |
$args = apply_filters("webfinger_user_query", $args, $uri, $scheme); |
| 331 |
|
| 332 |
// get user query |
| 333 |
$user_query = new WP_User_Query($args); |
| 334 |
|
| 335 |
// check result |
| 336 |
if (!empty($user_query->results)) { |
| 337 |
$user = $user_query->results[0]; |
| 338 |
} else { |
| 339 |
$user = null; |
| 340 |
} |
| 341 |
|
| 342 |
return $user; |
| 343 |
} |
| 344 |
|
| 345 |
/** |
| 346 |
* returns a users default webfinger |
| 347 |
* |
| 348 |
* @param mixed $id_or_name_or_object |
| 349 |
* @return string|null |
| 350 |
*/ |
| 351 |
public static function get_user_resource($id_or_name_or_object) { |
| 352 |
$user = self::get_user_by_various($id_or_name_or_object); |
| 353 |
|
| 354 |
if ($user) { |
| 355 |
$resource = $user->user_login."@".parse_url(home_url(), PHP_URL_HOST); |
| 356 |
|
| 357 |
return apply_filters('webfinger_user_resource', "acct:".$resource, $user); |
| 358 |
} else { |
| 359 |
return null; |
| 360 |
} |
| 361 |
} |
| 362 |
|
| 363 |
/** |
| 364 |
* returns all webfinger "resources" |
| 365 |
* |
| 366 |
* @param mixed $id_or_name_or_object |
| 367 |
* @return array |
| 368 |
*/ |
| 369 |
public static function get_user_resources($id_or_name_or_object) { |
| 370 |
$user = self::get_user_by_various($id_or_name_or_object); |
| 371 |
|
| 372 |
if (!$user) { |
| 373 |
return array(); |
| 374 |
} |
| 375 |
|
| 376 |
// generate account idenitfier (acct: uri) |
| 377 |
$resources[] = self::get_user_resource($user, true); |
| 378 |
$resources[] = get_author_posts_url($user->ID, $user->user_nicename); |
| 379 |
|
| 380 |
if ($user->user_email) { |
| 381 |
$resources[] = "mailto:".$user->user_email; |
| 382 |
} |
| 383 |
|
| 384 |
/* |
| 385 |
* the IM schemes are based on the "vCard Extensions for Instant Messaging (IM)". |
| 386 |
* that means that the YahooID for example is represented by ymsgr:identifier |
| 387 |
* and not by the ymsgr:SendIM?identifier pseudo uri |
| 388 |
* |
| 389 |
* @link http://tools.ietf.org/html/rfc4770#section-1 |
| 390 |
*/ |
| 391 |
if (get_user_meta($user->ID, "yim", true)) { |
| 392 |
$resources[] = "ymsgr:".get_user_meta($user->ID, "yim", true); |
| 393 |
} |
| 394 |
|
| 395 |
// aim:identifier instead of aim:goim?screenname=identifier |
| 396 |
if (get_user_meta($user->ID, "aim", true)) { |
| 397 |
$resources[] = "aim:".get_user_meta($user->ID, "aim", true); |
| 398 |
} |
| 399 |
|
| 400 |
if (get_user_meta($user->ID, "jabber", true)) { |
| 401 |
$resources[] = "xmpp:".get_user_meta($user->ID, "jabber", true); |
| 402 |
} |
| 403 |
|
| 404 |
return array_unique(apply_filters('webfinger_user_resources', $resources, $user)); |
| 405 |
} |
| 406 |
|
| 407 |
/** |
| 408 |
* convenience method to get user data by ID, username, object or from current user. |
| 409 |
* |
| 410 |
* @param mixed $id_or_name_or_object the username, ID or object. If not provided, the current user will be used. |
| 411 |
* @return bool|object False on failure, User DB row object |
| 412 |
* |
| 413 |
* @author Will Norris |
| 414 |
* @see get_userdata_by_various() # DiSo OpenID-Plugin |
| 415 |
*/ |
| 416 |
public static function get_user_by_various($id_or_name_or_object = null) { |
| 417 |
if ( $id_or_name_or_object === null ) { |
| 418 |
$user = wp_get_current_user(); |
| 419 |
if ($user == null) return false; |
| 420 |
return $user->data; |
| 421 |
} else if ( is_object($id_or_name_or_object) ) { |
| 422 |
return $id_or_name_or_object; |
| 423 |
} else if ( is_numeric($id_or_name_or_object) ) { |
| 424 |
return get_userdata($id_or_name_or_object); |
| 425 |
} else { |
| 426 |
return get_userdatabylogin($id_or_name_or_object); |
| 427 |
} |
| 428 |
} |
| 429 |
|
| 430 |
/** |
| 431 |
* backwards compatibility for old versions. please don't use! |
| 432 |
* |
| 433 |
* @deprecated |
| 434 |
* |
| 435 |
* @param array $webfinger |
| 436 |
* @param string $resource |
| 437 |
* @param WP_User $user |
| 438 |
* @return array |
| 439 |
*/ |
| 440 |
public static function legacy_filter($webfinger, $resource, $user) { |
| 441 |
// filter webfinger array |
| 442 |
return apply_filters('webfinger', $webfinger, $user, $resource, $_GET); |
| 443 |
} |
| 444 |
} |
| 445 |
|
| 446 |
if (!function_exists('url_to_authorid')) { |
| 447 |
/** |
| 448 |
* Examine a url and try to determine the author ID it represents. |
| 449 |
* |
| 450 |
* Checks are supposedly from the hosted site blog. |
| 451 |
* |
| 452 |
* @param string $url Permalink to check. |
| 453 |
* @return int User ID, or 0 on failure. |
| 454 |
*/ |
| 455 |
function url_to_authorid($url) { |
| 456 |
global $wp_rewrite; |
| 457 |
|
| 458 |
// check if url hase the same host |
| 459 |
if (parse_url(site_url(), PHP_URL_HOST) != parse_url($url, PHP_URL_HOST)) { |
| 460 |
return 0; |
| 461 |
} |
| 462 |
|
| 463 |
// First, check to see if there is a 'author=N' to match against |
| 464 |
if ( preg_match('/[?&]author=(\d+)/i', $url, $values) ) { |
| 465 |
$id = absint($values[1]); |
| 466 |
if ( $id ) |
| 467 |
return $id; |
| 468 |
} |
| 469 |
|
| 470 |
// Check to see if we are using rewrite rules |
| 471 |
$rewrite = $wp_rewrite->wp_rewrite_rules(); |
| 472 |
|
| 473 |
// Not using rewrite rules, and 'author=N' method failed, so we're out of options |
| 474 |
if ( empty($rewrite) ) |
| 475 |
return 0; |
| 476 |
|
| 477 |
// generate rewrite rule for the author url |
| 478 |
$author_rewrite = $wp_rewrite->get_author_permastruct(); |
| 479 |
$author_regexp = str_replace("%author%", "", $author_rewrite); |
| 480 |
|
| 481 |
// match the rewrite rule with the passed url |
| 482 |
if (preg_match("/https?:\/\/(.+)".preg_quote($author_regexp, '/')."([^\/]+)/i", $url, $match)) { |
| 483 |
if ($user = get_user_by("slug", $match[2])) { |
| 484 |
return $user->ID; |
| 485 |
} |
| 486 |
} |
| 487 |
|
| 488 |
return 0; |
| 489 |
} |
| 490 |
} |
