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<?php |
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/* |
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Plugin Name: Webfinger |
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Plugin URI: http://wordpress.org/extend/plugins/webfinger/ |
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Description: Webfinger for WordPress |
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Version: 2.0.0 |
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Author: pfefferle |
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Author URI: http://notizblog.org/ |
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*/ |
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|
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/** |
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* webfinger |
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* |
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* @author Matthias Pfefferle |
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*/ |
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class WebfingerPlugin { |
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|
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/** |
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* adds some query vars |
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* |
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* @param array $vars |
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* @return array |
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*/ |
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public function query_vars($vars) { |
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$vars[] = 'webfinger-uri'; |
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$vars[] = 'well-known'; |
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$vars[] = 'format'; |
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$vars[] = 'resource'; |
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$vars[] = 'rel'; |
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|
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return $vars; |
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} |
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|
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/** |
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* Add rewrite rules |
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* |
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* @param WP_Rewrite |
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*/ |
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function rewrite_rules( $wp_rewrite ) { |
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$webfinger_rules = array( |
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'.well-known/webfinger' => 'index.php?well-known=webfinger' |
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); |
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|
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$wp_rewrite->rules = $webfinger_rules + $wp_rewrite->rules; |
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} |
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|
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/** |
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* renders the output-file |
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* |
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* @param array |
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*/ |
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public function parse_request($wp) { |
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// check if "resource" param exists |
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if (!array_key_exists('resource', $wp->query_vars)) { |
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return; |
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} |
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|
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// find matching user |
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$user = WebfingerPlugin::get_user_by_uri($wp->query_vars['resource']); |
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|
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if (!$user) { |
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return; |
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} |
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|
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$format = 'json'; |
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if (array_key_exists('format', $wp->query_vars)) { |
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$format = $wp->query_vars['format']; |
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} |
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|
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$webfinger = apply_filters('webfinger', array(), $user, $wp->query_vars['resource'], $wp->query_vars); |
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|
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do_action("webfinger_render", $format, $webfinger, $user, $wp->query_vars); |
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do_action("webfinger_render_{$format}", $webfinger, $user, $wp->query_vars); |
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} |
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|
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/** |
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* renders the webfinger file in json |
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*/ |
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public function render_jrd($webfinger) { |
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header("Access-Control-Allow-Origin: *"); |
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header('Content-Type: application/jrd+json; charset=' . get_bloginfo('charset'), true); |
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|
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echo json_encode($webfinger); |
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exit(); |
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} |
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|
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/** |
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* renders the webfinger file in xml |
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*/ |
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public function render_xrd($webfinger, $user) { |
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header("Access-Control-Allow-Origin: *"); |
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header('Content-Type: application/xrd+xml; charset=' . get_bloginfo('charset'), true); |
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|
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echo "<?xml version='1.0' encoding='".get_bloginfo('charset')."'?>\n"; |
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echo "<XRD xmlns='http://docs.oasis-open.org/ns/xri/xrd-1.0'\n"; |
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// add xml-only namespaces |
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do_action('webfinger_ns'); |
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echo ">\n"; |
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|
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echo WebfingerPlugin::jrd_to_xrd($webfinger); |
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// add xml-only content |
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do_action('webfinger_xrd', $user); |
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|
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echo "\n</XRD>"; |
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exit; |
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} |
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|
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/** |
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* generates the webfinger base array |
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*/ |
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public function generate_default_content($webfinger, $user, $resource) { |
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$url = get_author_posts_url($user->ID, $user->user_nicename); |
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$photo = get_user_meta($user->ID, 'photo', true); |
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if(!$photo) $photo = 'http://www.gravatar.com/avatar/'.md5($user->user_email); |
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$webfinger = array('subject' => $resource, |
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'aliases' => WebfingerPlugin::get_resources($user->ID), |
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'links' => array( |
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array('rel' => 'http://webfinger.net/rel/profile-page', 'type' => 'text/html', 'href' => $url), |
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array('rel' => 'http://webfinger.net/rel/avatar', 'href' => $photo) |
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)); |
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if ($user->user_url) { |
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$webfinger['links'][] = array('rel' => 'http://webfinger.net/rel/profile-page', 'type' => 'text/html', 'href' => $user->user_url); |
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} |
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|
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return $webfinger; |
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} |
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|
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/** |
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* filters the webfinger array by request params like "rel" |
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* |
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* @link tools.ietf.org/html/draft-jones-appsawg-webfinger#section-4.3 |
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* @param array $array |
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* @param stdClass $user |
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* @param array $queries |
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* @return array |
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*/ |
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public function filter_by_rel($webfinger, $user, $resource, $queries) { |
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// check if "rel" is set |
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if (!array_key_exists('rel', $queries)) { |
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return $webfinger; |
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} |
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|
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remove_all_actions('webfinger_xrd'); |
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|
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// filter webfinger-array |
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$links = array(); |
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foreach ($webfinger['links'] as $link) { |
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if ($link["rel"] == $queries["rel"]) { |
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$links[] = $link; |
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} |
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} |
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$webfinger['links'] = $links; |
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|
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// return only "links" with the matching |
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return $webfinger; |
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} |
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|
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/** |
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* add the host meta information |
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*/ |
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public function add_host_meta_links($array) { |
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$array["links"][] = array("rel" => "lrdd", "template" => site_url("/?well-known=webfinger&resource={uri}&format=xrd"), "type" => "application/xrd+xml"); |
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|
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return $array; |
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} |
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|
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/** |
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* returns a Userobject |
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* |
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* @param string $uri |
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* @return stdClass |
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*/ |
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private function get_user_by_uri($uri) { |
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global $wpdb; |
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|
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$uri = urldecode($uri); |
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|
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if (preg_match("~^https?://~i", $uri)) { |
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// check if url matches with a |
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// users profile url |
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foreach (get_users_of_blog() as $user) { |
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if (rtrim(str_replace("www.", "", get_author_posts_url($user->ID, $user->user_nicename)), "/") == |
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rtrim(str_replace("www.", "", $uri), "/")) { |
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return $user; |
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} |
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} |
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} elseif (preg_match('/^([a-zA-Z]+:)?([^@]+)@([a-zA-Z0-9._-]+)$/i', $uri, $array)) { |
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$username = $array[2]; |
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$host = $array[3]; |
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$email = $username."@".$host; |
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|
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if ($host == parse_url(get_bloginfo('url'), PHP_URL_HOST)) { |
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$sql = "SELECT * FROM $wpdb->users u INNER JOIN $wpdb->usermeta um ON u.id=um.user_id WHERE u.user_email = '%s' OR |
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(um.meta_key = 'jabber' AND um.meta_value = '%s') OR |
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u.user_login = '%s' LIMIT 1;"; |
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$user = $wpdb->get_results($wpdb->prepare($sql, $email, $email, $username)); |
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if (!empty($user)) { |
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return $user[0]; |
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} |
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} |
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} |
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|
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return false; |
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} |
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|
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/** |
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* recursive helper to generade the xrd-xml from the jrd array |
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* |
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* @param string $host_meta |
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* @return string |
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*/ |
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public function jrd_to_xrd($webfinger) { |
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$xrd = null; |
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|
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foreach ($webfinger as $type => $content) { |
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// print subject |
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if ($type == "subject") { |
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$xrd .= "<Subject>$content</Subject>"; |
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continue; |
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} |
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|
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// print aliases |
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if ($type == "aliases") { |
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foreach ($content as $uri) { |
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$xrd .= "<Alias>".htmlentities($uri)."</Alias>"; |
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} |
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continue; |
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} |
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|
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// print properties |
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if ($type == "properties") { |
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foreach ($content as $type => $uri) { |
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$xrd .= "<Property type='".htmlentities($type)."'>".htmlentities($uri)."</Property>"; |
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} |
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continue; |
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} |
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|
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// print titles |
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if ($type == "titles") { |
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foreach ($content as $key => $value) { |
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if ($key == "default") { |
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$xrd .= "<Title>".htmlentities($value)."</Title>"; |
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} else { |
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$xrd .= "<Title xml:lang='".htmlentities($key)."'>".htmlentities($value)."</Title>"; |
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} |
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} |
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continue; |
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} |
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|
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// print links |
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if ($type == "links") { |
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foreach ($content as $links) { |
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$temp = array(); |
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$cascaded = false; |
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$xrd .= "<Link "; |
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|
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foreach ($links as $key => $value) { |
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if (is_array($value)) { |
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$temp[$key] = $value; |
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$cascaded = true; |
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} else { |
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$xrd .= htmlentities($key)."='".htmlentities($value)."' "; |
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} |
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} |
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if ($cascaded) { |
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$xrd .= ">"; |
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$xrd .= WebfingerPlugin::jrd_to_xrd($temp); |
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$xrd .= "</Link>"; |
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} else { |
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$xrd .= " />"; |
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} |
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} |
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|
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continue; |
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} |
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} |
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|
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return $xrd; |
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} |
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|
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/** |
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* returns a users default webfinger |
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* |
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* @param mixed $id_or_name_or_object |
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* @param boolean $protocol |
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* @return string |
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*/ |
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function get_resource($id_or_name_or_object, $protocol = false) { |
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$user = WebfingerPlugin::get_user_by_various($id_or_name_or_object); |
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|
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if ($user) { |
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$resource = $user->user_login."@".parse_url(home_url(), PHP_URL_HOST); |
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if ($protocol) { |
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$resource = "acct:".$resource; |
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} |
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return $resource; |
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} else { |
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return null; |
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} |
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} |
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|
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/** |
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* returns all webfinger "resources" |
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* |
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* @param mixed $id_or_name_or_object |
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* |
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* @return array |
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*/ |
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public function get_resources($id_or_name_or_object) { |
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$user = WebfingerPlugin::get_user_by_various($id_or_name_or_object); |
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|
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if ($user) { |
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$resources[] = WebfingerPlugin::get_resource($user, true); |
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$resources[] = get_author_posts_url($user->ID, $user->user_nicename); |
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if ($user->user_email && WebfingerPlugin::check_mail_domain($user->user_email)) { |
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$resources[] = "mailto:".$user->user_email; |
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} |
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if (get_user_meta($user->ID, "jabber", true) && $webfinger->check_mail_domain(get_user_meta($user->ID, "jabber", true))) { |
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$resources[] = "xmpp:".get_user_meta($user->ID, "jabber", true); |
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} |
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$resources = apply_filters('resources', $resources); |
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|
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return array_unique($resources); |
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} else { |
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return array(); |
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} |
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} |
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|
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/** |
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* Convenience method to get user data by ID, username, object or from current user. |
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* |
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* @param mixed $id_or_name_or_object the username, ID or object. If not provided, the current user will be used. |
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* @return bool|object False on failure, User DB row object |
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* |
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* @author Will Norris |
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* @see get_userdata_by_various() # DiSo OpenID-Plugin |
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*/ |
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public function get_user_by_various($id_or_name_or_object = null) { |
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if ( $id_or_name_or_object === null ) { |
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$user = wp_get_current_user(); |
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if ($user == null) return false; |
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return $user->data; |
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} else if ( is_object($id_or_name_or_object) ) { |
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return $id_or_name_or_object; |
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} else if ( is_numeric($id_or_name_or_object) ) { |
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return get_userdata($id_or_name_or_object); |
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} else { |
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return get_userdatabylogin($id_or_name_or_object); |
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} |
| 350 |
} |
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|
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/** |
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* check if the email address has the same domain as the blog |
| 354 |
* |
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* @param string $email |
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* @return boolean |
| 357 |
*/ |
| 358 |
public function check_mail_domain($email) { |
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if (preg_match('/^([a-zA-Z]+:)?([^@]+)@([a-zA-Z0-9._-]+)$/i', $email, $email_parts) && |
| 360 |
($email_parts[3] == parse_url(home_url(), PHP_URL_HOST))) { |
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return true; |
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} |
| 363 |
|
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return false; |
| 365 |
} |
| 366 |
|
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public function host_meta_draft($format, $host_meta, $query_vars) { |
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|
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if (!array_key_exists('resource', $query_vars)) { |
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return; |
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} |
| 372 |
|
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// find matching user |
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$user = WebfingerPlugin::get_user_by_uri($query_vars['resource']); |
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|
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if (!$user) { |
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return; |
| 378 |
} |
| 379 |
|
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$webfinger = apply_filters('webfinger', array(), $user, $query_vars['resource'], $query_vars); |
| 381 |
|
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do_action("webfinger_render", $format, $webfinger, $user, $query_vars); |
| 383 |
do_action("webfinger_render_{$format}", $webfinger, $user, $query_vars); |
| 384 |
} |
| 385 |
} |
| 386 |
|
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add_action('query_vars', array('WebfingerPlugin', 'query_vars')); |
| 388 |
add_action('parse_request', array('WebfingerPlugin', 'parse_request')); |
| 389 |
add_action('generate_rewrite_rules', array('WebfingerPlugin', 'rewrite_rules')); |
| 390 |
|
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add_action('host_meta_render', array('WebfingerPlugin', 'host_meta_draft'), 1, 3); |
| 392 |
|
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add_action('webfinger_render_json', array('WebfingerPlugin', 'render_jrd'), 1, 1); |
| 394 |
add_action('webfinger_render_jrd', array('WebfingerPlugin', 'render_jrd'), 1, 1); |
| 395 |
|
| 396 |
add_action('webfinger_render_xml', array('WebfingerPlugin', 'render_xrd'), 1, 2); |
| 397 |
add_action('webfinger_render_xrd', array('WebfingerPlugin', 'render_xrd'), 1, 2); |
| 398 |
|
| 399 |
add_filter('webfinger', array('WebfingerPlugin', 'generate_default_content'), 0, 3); |
| 400 |
add_filter('webfinger', array('WebfingerPlugin', 'filter_by_rel'), 99, 4); |
| 401 |
|
| 402 |
add_filter('host_meta', array('WebfingerPlugin', 'add_host_meta_links')); |
| 403 |
|
| 404 |
register_activation_hook(__FILE__, 'flush_rewrite_rules'); |
| 405 |
register_deactivation_hook(__FILE__, 'flush_rewrite_rules'); |
| 406 |
|
