get_user_by_various($id_or_name_or_object);
if ($user) {
$webfinger = $user->user_login."@".parse_url(get_bloginfo('url'), PHP_URL_HOST);
if ($protocol) {
$webfinger = "acct:".$webfinger;
}
return $webfinger;
} else {
return null;
}
}
/**
* returns all webfingers
*
* @param mixed $id_or_name_or_object
* @param boolean $protocol
*
* @return array
*/
function get_webfingers($id_or_name_or_object = null, $protocol = false) {
$webfinger = new WebfingerPlugin();
$user = $webfinger->get_user_by_various($id_or_name_or_object);
$webfingers = array();
if ($user) {
$webfingers[] = ($protocol ? "acct:" : "").get_webfinger($user);
$webfingers[] = get_author_posts_url($user->ID, $user->user_nicename);
$webfingers = apply_filters('webfingers', $webfingers);
return $webfingers;
} else {
return array();
}
}
/**
* webfinger
*
* @author Matthias Pfefferle
*/
class WebfingerPlugin {
private $user;
private $webfinger_uri;
/**
* adds some query vars
*
* @param array $vars
* @return array
*/
public function query_vars($vars) {
$vars[] = 'webfinger-uri';
$vars[] = 'webfinger';
$vars[] = 'format';
$vars[] = 'principal';
$vars[] = 'service';
return $vars;
}
/**
* parses the request
*
* @return mixed
*/
public function parse_request() {
global $wp_query, $wp;
$query_vars = $wp->query_vars;
if( array_key_exists('webfinger-uri', $query_vars) ) {
if (!$this->user = $this->get_user_by_uri($query_vars['webfinger-uri'])) {
header("HTTP/1.0 404 Not Found");
echo "Not Found";
exit;
}
$this->webfinger_uri = $query_vars['webfinger-uri'];
$accept = explode(',', $_SERVER['HTTP_ACCEPT']);
if (in_array('application/json', $accept) || (array_key_exists('format', $query_vars) && $query_vars['format'] == "json")) {
$this->render_jrd();
} else {
$this->render_xrd();
}
exit;
}
}
public function render_simple_web_discovery($request) {
$this->user = $this->get_user_by_uri($request['principal']);
$this->webfinger_uri = $request['principal'];
if ($this->user) {
$content = $this->generate_content();
$swd = array();
foreach ($content['links'] as $link) {
if ($link['rel'] == $request['service']) {
$swd['locations'][] = $link['href'];
}
}
$swd = apply_filters('simple_web_discovery', $swd, $this->user, $request['service']);
if ($swd) {
header("Access-Control-Allow-Origin: *");
header('Content-Type: application/json; charset=' . get_option('blog_charset'), true);
echo json_encode($swd);
exit;
}
}
header("HTTP/1.0 404 Not Found");
echo "Not Found";
exit;
}
/**
* renders the webfinger file in xml
*/
public function render_xrd() {
header("Access-Control-Allow-Origin: *");
header('Content-Type: application/xrd+xml; charset=' . get_option('blog_charset'), true);
$content_array = $this->generate_content();
echo "\n";
echo "\n";
echo $this->jrd_to_xrd($content_array);
// add xml-only content
do_action('webfinger_xrd', $this->user);
echo "\n";
}
/**
* renders the webfinger file in json
*/
public function render_jrd() {
header("Access-Control-Allow-Origin: *");
header('Content-Type: application/json; charset=' . get_option('blog_charset'), true);
$webfinger = $this->generate_content();
echo json_encode($webfinger);
}
/**
* generates the webfinger base array (and activate filter)
*
* @return array
*/
public function generate_content() {
$url = get_author_posts_url($this->user->ID, $this->user->user_nicename);
$photo = get_user_meta($this->user->ID, 'photo', true);
if(!$photo) $photo = 'http://www.gravatar.com/avatar/'.md5($this->user->user_email);
$webfinger = array('subject' => $this->webfinger_uri,
'aliases' => array($url),
'links' => array(
array('rel' => 'http://webfinger.net/rel/profile-page', 'type' => 'text/html', 'href' => $url),
array('rel' => 'http://webfinger.net/rel/avatar', 'href' => $photo)
));
if ($this->user->user_url) {
$webfinger['links'][] = array('rel' => 'http://webfinger.net/rel/profile-page', 'type' => 'text/html', 'href' => $this->user->user_url);
}
$webfinger = apply_filters('webfinger', $webfinger, $this->user);
return $webfinger;
}
/**
* recursive helper to generade the xrd-xml from the jrd array
*
* @param string $host_meta
* @return string
*/
public function jrd_to_xrd($webfinger) {
$xrd = null;
foreach ($webfinger as $type => $content) {
// print subject
if ($type == "subject") {
$xrd .= "$content";
continue;
}
// print aliases
if ($type == "aliases") {
foreach ($content as $uri) {
$xrd .= "".htmlentities($uri)."";
}
continue;
}
// print properties
if ($type == "properties") {
foreach ($content as $type => $uri) {
$xrd .= "".htmlentities($uri)."";
}
continue;
}
// print titles
if ($type == "titles") {
foreach ($content as $key => $value) {
if ($key == "default") {
$xrd .= "".htmlentities($value)."";
} else {
$xrd .= "".htmlentities($value)."";
}
}
continue;
}
// print links
if ($type == "links") {
foreach ($content as $links) {
$temp = array();
$cascaded = false;
$xrd .= " $value) {
if (is_array($value)) {
$temp[$key] = $value;
$cascaded = true;
} else {
$xrd .= htmlentities($key)."='".htmlentities($value)."' ";
}
}
if ($cascaded) {
$xrd .= ">";
$xrd .= $this->jrd_to_xrd($temp);
$xrd .= "";
} else {
$xrd .= " />";
}
}
continue;
}
}
return $xrd;
}
/**
* returns a Userobject
*
* @param string $uri
* @return stdClass
*/
private function get_user_by_uri($uri) {
global $wpdb;
$uri = urldecode($uri);
if (preg_match("~^https?://~i", $uri)) {
// check if url matches with a
// users profile url
foreach (get_users_of_blog() as $user) {
if (rtrim(str_replace("www.", "", get_author_posts_url($user->ID, $user->user_nicename)), "/") ==
rtrim(str_replace("www.", "", $uri), "/")) {
return $user;
}
}
} elseif (preg_match('/^([a-zA-Z]+:)?([^@]+)@([a-zA-Z0-9._-]+)$/i', $uri, $array)) {
$username = $array[2];
$host = $array[3];
$email = $username."@".$host;
if ($host == parse_url(get_bloginfo('url'), PHP_URL_HOST)) {
$sql = "SELECT * FROM $wpdb->users u INNER JOIN $wpdb->usermeta um ON u.id=um.user_id WHERE u.user_email = '$email' OR
(um.meta_key = 'jabber' AND um.meta_value = '$email') OR
u.user_login = '$username' LIMIT 1;";
$user = $wpdb->get_results($wpdb->prepare($sql));
if (!empty($user)) {
return $user[0];
}
}
}
return false;
}
/**
* add the host meta information
*/
public function add_host_meta_link() {
echo "";
}
/**
* add the host meta information
*/
public function add_host_meta_info($array) {
$array["links"][] = array("rel" => "lrdd", "template" => get_option('siteurl')."/?webfinger-uri={uri}", "type" => "application/xrd+xml");
$array["links"][] = array("rel" => "lrdd", "template" => get_option('siteurl')."/?webfinger-uri={uri}?format=json", "type" => "application/json");
return $array;
}
/**
* adds lrdd-header-link to author profile pages
*/
public function add_html_link() {
global $wp_query;
if (is_author() && !is_feed()) {
$author = $wp_query->get_queried_object();
$url = get_author_posts_url($author->ID, $author->user_nicename);
echo "\n";
echo "";
echo "\n";
}
}
/**
* prints webfinger part on the user-site
*
* @param stdClass $user
*/
public function user_profile_infos($user) {
$webfingers = get_webfingers($user, true);
?>
Webfinger
' . __('Identifiers') . '';
array_unshift( $links, $settings_link );
}
return $links;
}
/**
* Convenience method to get user data by ID, username, object or from current user.
*
* @param mixed $id_or_name_or_object the username, ID or object. If not provided, the current user will be used.
* @return bool|object False on failure, User DB row object
*
* @author Will Norris
* @see get_userdata_by_various() # DiSo OpenID-Plugin
*/
public function get_user_by_various($id_or_name_or_object = null) {
if ( $id_or_name_or_object === null ) {
$user = wp_get_current_user();
if ($user == null) return false;
return $user->data;
} else if ( is_object($id_or_name_or_object) ) {
return $id_or_name_or_object;
} else if ( is_numeric($id_or_name_or_object) ) {
return get_userdata($id_or_name_or_object);
} else {
return get_userdatabylogin($id_or_name_or_object);
}
}
}
function webfinger_init() {
$webfinger = new WebfingerPlugin();
add_action('well_known_simple-web-discovery', array(&$webfinger, 'render_simple_web_discovery'), 2);
add_filter('query_vars', array(&$webfinger, 'query_vars'));
add_action('parse_request', array(&$webfinger, 'parse_request'));
add_action('wp_head', array(&$webfinger, 'add_html_link'));
add_filter('host_meta', array(&$webfinger, 'add_host_meta_info'));
add_filter('plugin_action_links', array(&$webfinger, 'settings_link'), 10, 2);
// add profile parts
add_action('show_user_profile', array(&$webfinger, 'user_profile_infos'));
add_action('edit_user_profile', array(&$webfinger, 'user_profile_infos'));
}
webfinger_init();
?>