]> git.mxchange.org Git - friendica.git/blobdiff - src/Network/Probe.php
Merge pull request #4152 from MrPetovan/task/4137-add-posts-only-feed
[friendica.git] / src / Network / Probe.php
index 5168e4c2626eaad52ca69dcbe9c661805338edb7..539803b6e4d93acfc56ea918f5c2bc59f3ff75f4 100644 (file)
@@ -1,33 +1,38 @@
 <?php
-
+/**
+ * @file src/Network/Probe.php
+ */
 namespace Friendica\Network;
 
 /**
  * @file src/Network/Probe.php
  * @brief Functions for probing URL
- *
  */
 
 use Friendica\App;
+use Friendica\Core\System;
+use Friendica\Core\Cache;
 use Friendica\Core\Config;
-
-use dbm;
-use Cache;
-use xml;
-
-use DomXPath;
+use Friendica\Database\DBM;
+use Friendica\Model\Profile;
+use Friendica\Protocol\Email;
+use Friendica\Protocol\Feed;
+use Friendica\Util\Crypto;
+use Friendica\Util\XML;
+
+use dba;
+use DOMXPath;
 use DOMDocument;
 
-require_once 'include/feed.php';
-require_once 'include/email.php';
+require_once 'include/dba.php';
 require_once 'include/network.php';
 
 /**
  * @brief This class contain functions for probing URL
  *
  */
-class Probe {
-
+class Probe
+{
        private static $baseurl;
 
        /**
@@ -37,7 +42,8 @@ class Probe {
         *
         * @return array Ordered data
         */
-       private static function rearrangeData($data) {
+       private static function rearrangeData($data)
+       {
                $fields = array("name", "nick", "guid", "url", "addr", "alias",
                                "photo", "community", "keywords", "location", "about",
                                "batch", "notify", "poll", "request", "confirm", "poco",
@@ -65,7 +71,8 @@ class Probe {
         *
         * @return bool Does the testes hostname belongs to the own server?
         */
-       private static function ownHost($host) {
+       private static function ownHost($host)
+       {
                $own_host = get_app()->get_hostname();
 
                $parts = parse_url($host);
@@ -81,17 +88,14 @@ class Probe {
        }
 
        /**
-        * @brief Probes for XRD data
+        * @brief Probes for webfinger path via "host-meta"
         *
         * @param string $host The host part of an url
         *
-        * @return array
-        *      'lrdd' => Link to LRDD endpoint
-        *      'lrdd-xml' => Link to LRDD endpoint in XML format
-        *      'lrdd-json' => Link to LRDD endpoint in JSON format
+        * @return array with template and type of the webfinger template for JSON or XML
         */
-       private static function xrd($host) {
-
+       private static function hostMeta($host)
+       {
                // Reset the static variable
                self::$baseurl = '';
 
@@ -107,6 +111,7 @@ class Probe {
                if ($ret['success']) {
                        $xml = $ret['body'];
                        $xrd = parse_xml_string($xml, false);
+                       $host_url = 'https://'.$host;
                }
 
                if (!is_object($xrd)) {
@@ -117,19 +122,24 @@ class Probe {
                        }
                        $xml = $ret['body'];
                        $xrd = parse_xml_string($xml, false);
+                       $host_url = 'http://'.$host;
                }
                if (!is_object($xrd)) {
                        logger("No xrd object found for ".$host, LOGGER_DEBUG);
                        return array();
                }
 
-               $links = xml::element_to_array($xrd);
+               $links = XML::elementToArray($xrd);
                if (!isset($links["xrd"]["link"])) {
                        logger("No xrd data found for ".$host, LOGGER_DEBUG);
                        return array();
                }
 
-               $xrd_data = array();
+               $lrdd = array();
+               // The following webfinger path is defined in RFC 7033 https://tools.ietf.org/html/rfc7033
+               // Problem is that Hubzilla currently doesn't provide all data in the JSON webfinger
+               // compared to the XML webfinger. So this is commented out by now.
+               // $lrdd = array("application/jrd+json" => $host_url.'/.well-known/webfinger?resource={uri}');
 
                foreach ($links["xrd"]["link"] as $value => $link) {
                        if (!empty($link["@attributes"])) {
@@ -140,16 +150,10 @@ class Probe {
                                continue;
                        }
 
-                       if (($attributes["rel"] == "lrdd")
-                               && ($attributes["type"] == "application/xrd+xml")
-                       ) {
-                               $xrd_data["lrdd-xml"] = $attributes["template"];
-                       } elseif (($attributes["rel"] == "lrdd")
-                               && ($attributes["type"] == "application/json")
-                       ) {
-                               $xrd_data["lrdd-json"] = $attributes["template"];
-                       } elseif ($attributes["rel"] == "lrdd") {
-                               $xrd_data["lrdd"] = $attributes["template"];
+                       if (($attributes["rel"] == "lrdd") && !empty($attributes["template"])) {
+                               $type = (empty($attributes["type"]) ? '' : $attributes["type"]);
+
+                               $lrdd[$type] = $attributes["template"];
                        }
                }
 
@@ -157,7 +161,7 @@ class Probe {
 
                logger("Probing successful for ".$host, LOGGER_DEBUG);
 
-               return $xrd_data;
+               return $lrdd;
        }
 
        /**
@@ -175,13 +179,13 @@ class Probe {
         * amended 7/9/2011 to return an hcard which could save potentially loading
         * a lengthy content page to scrape dfrn attributes
         *
-        * @param string $webbie Address that should be probed
+        * @param string $webbie    Address that should be probed
         * @param string $hcard_url Link to the hcard - is returned by reference
         *
         * @return string profile link
         */
-       public static function webfingerDfrn($webbie, &$hcard_url) {
-
+       public static function webfingerDfrn($webbie, &$hcard_url)
+       {
                $profile_link = '';
 
                $links = self::lrdd($webbie);
@@ -213,9 +217,9 @@ class Probe {
         *
         * @return array uri data
         */
-       public static function lrdd($uri) {
-
-               $lrdd = self::xrd($uri);
+       public static function lrdd($uri)
+       {
+               $lrdd = self::hostMeta($uri);
                $webfinger = null;
 
                if (is_bool($lrdd)) {
@@ -238,7 +242,7 @@ class Probe {
                        $nick = array_pop($path_parts);
 
                        do {
-                               $lrdd = self::xrd($host);
+                               $lrdd = self::hostMeta($host);
                                $host .= "/".array_shift($path_parts);
                        } while (!$lrdd && (sizeof($path_parts) > 0));
                }
@@ -248,21 +252,17 @@ class Probe {
                        return array();
                }
 
-               foreach ($lrdd as $key => $link) {
+               foreach ($lrdd as $type => $template) {
                        if ($webfinger) {
                                continue;
                        }
 
-                       if (!in_array($key, array("lrdd", "lrdd-xml", "lrdd-json"))) {
-                               continue;
-                       }
-
-                       $path = str_replace('{uri}', urlencode($uri), $link);
-                       $webfinger = self::webfinger($path);
+                       $path = str_replace('{uri}', urlencode($uri), $template);
+                       $webfinger = self::webfinger($path, $type);
 
                        if (!$webfinger && (strstr($uri, "@"))) {
-                               $path = str_replace('{uri}', urlencode("acct:".$uri), $link);
-                               $webfinger = self::webfinger($path);
+                               $path = str_replace('{uri}', urlencode("acct:".$uri), $template);
+                               $webfinger = self::webfinger($path, $type);
                        }
 
                        // Special treatment for Mastodon
@@ -274,8 +274,8 @@ class Probe {
 
                                $addr = $nick."@".$host;
 
-                               $path = str_replace('{uri}', urlencode("acct:".$addr), $link);
-                               $webfinger = self::webfinger($path);
+                               $path = str_replace('{uri}', urlencode("acct:".$addr), $template);
+                               $webfinger = self::webfinger($path, $type);
                        }
                }
 
@@ -304,23 +304,23 @@ class Probe {
        /**
         * @brief Fetch information (protocol endpoints and user information) about a given uri
         *
-        * @param string $uri Address that should be probed
-        * @param string $network Test for this specific network
-        * @param integer $uid User ID for the probe (only used for mails)
-        * @param boolean $cache Use cached values?
+        * @param string  $uri     Address that should be probed
+        * @param string  $network Test for this specific network
+        * @param integer $uid     User ID for the probe (only used for mails)
+        * @param boolean $cache   Use cached values?
         *
         * @return array uri data
         */
-       public static function uri($uri, $network = "", $uid = 0, $cache = true) {
-
+       public static function uri($uri, $network = "", $uid = -1, $cache = true)
+       {
                if ($cache) {
-                       $result = Cache::get("probe_url:".$network.":".$uri);
+                       $result = Cache::get("Probe::uri:".$network.":".$uri);
                        if (!is_null($result)) {
                                return $result;
                        }
                }
 
-               if ($uid == 0) {
+               if ($uid == -1) {
                        $uid = local_user();
                }
 
@@ -333,7 +333,7 @@ class Probe {
                if ($data["photo"] != "") {
                        $data["baseurl"] = matching_url(normalise_link($data["baseurl"]), normalise_link($data["photo"]));
                } else {
-                       $data["photo"] = App::get_baseurl().'/images/person-175.jpg';
+                       $data["photo"] = System::baseUrl().'/images/person-175.jpg';
                }
 
                if (empty($data["name"])) {
@@ -366,7 +366,7 @@ class Probe {
 
                // Only store into the cache if the value seems to be valid
                if (!in_array($data['network'], array(NETWORK_PHANTOM, NETWORK_MAIL))) {
-                       Cache::set("probe_url:".$network.":".$uri, $data, CACHE_DAY);
+                       Cache::set("Probe::uri:".$network.":".$uri, $data, CACHE_DAY);
 
                        /// @todo temporary fix - we need a real contact update function that updates only changing fields
                        /// The biggest problem is the avatar picture that could have a reduced image size.
@@ -380,19 +380,68 @@ class Probe {
                                && $data["addr"]
                                && $data["poll"]
                        ) {
-                               q("UPDATE `contact` SET `name` = '%s', `nick` = '%s', `url` = '%s', `addr` = '%s',
-                                               `notify` = '%s', `poll` = '%s', `alias` = '%s', `success_update` = '%s'
-                                       WHERE `nurl` = '%s' AND NOT `self` AND `uid` = 0",
-                                       dbesc($data["name"]),
-                                       dbesc($data["nick"]),
-                                       dbesc($data["url"]),
-                                       dbesc($data["addr"]),
-                                       dbesc($data["notify"]),
-                                       dbesc($data["poll"]),
-                                       dbesc($data["alias"]),
-                                       dbesc(datetime_convert()),
-                                       dbesc(normalise_link($data['url']))
-                               );
+                               $fields = array('name' => $data['name'],
+                                               'nick' => $data['nick'],
+                                               'url' => $data['url'],
+                                               'addr' => $data['addr'],
+                                               'photo' => $data['photo'],
+                                               'keywords' => $data['keywords'],
+                                               'location' => $data['location'],
+                                               'about' => $data['about'],
+                                               'notify' => $data['notify'],
+                                               'network' => $data['network'],
+                                               'server_url' => $data['baseurl']);
+
+                               $fieldnames = array();
+
+                               foreach ($fields as $key => $val) {
+                                       if (empty($val)) {
+                                               unset($fields[$key]);
+                                       } else {
+                                               $fieldnames[] = $key;
+                                       }
+                               }
+
+                               $fields['updated'] = DBM::date();
+
+                               $condition = array('nurl' => normalise_link($data["url"]));
+
+                               $old_fields = dba::select('gcontact', $fieldnames, $condition, array('limit' => 1));
+
+                               dba::update('gcontact', $fields, $condition, $old_fields);
+
+                               $fields = array('name' => $data['name'],
+                                               'nick' => $data['nick'],
+                                               'url' => $data['url'],
+                                               'addr' => $data['addr'],
+                                               'alias' => $data['alias'],
+                                               'keywords' => $data['keywords'],
+                                               'location' => $data['location'],
+                                               'about' => $data['about'],
+                                               'batch' => $data['batch'],
+                                               'notify' => $data['notify'],
+                                               'poll' => $data['poll'],
+                                               'request' => $data['request'],
+                                               'confirm' => $data['confirm'],
+                                               'poco' => $data['poco'],
+                                               'network' => $data['network'],
+                                               'success_update' => DBM::date());
+
+                               $fieldnames = array();
+
+                               foreach ($fields as $key => $val) {
+                                       if (empty($val)) {
+                                               unset($fields[$key]);
+                                       } else {
+                                               $fieldnames[] = $key;
+                                       }
+                               }
+
+                               $condition = array('nurl' => normalise_link($data["url"]), 'self' => false, 'uid' => 0);
+
+                               $old_fields = dba::select('contact', $fieldnames, $condition, array('limit' => 1));
+
+                               dba::update('contact', $fields, $condition, $old_fields);
                        }
                }
 
@@ -406,7 +455,8 @@ class Probe {
         *
         * @return string switched URL
         */
-       private static function switchScheme($url) {
+       private static function switchScheme($url)
+       {
                $parts = parse_url($url);
 
                if (!isset($parts['scheme'])) {
@@ -425,12 +475,14 @@ class Probe {
        /**
         * @brief Checks if a profile url should be OStatus but only provides partial information
         *
-        * @param array $webfinger Webfinger data
-        * @param string $lrdd Path template for webfinger request
+        * @param array  $webfinger Webfinger data
+        * @param string $lrdd      Path template for webfinger request
+        * @param string $type      type
         *
         * @return array fixed webfinger data
         */
-       private static function fixOstatus($webfinger, $lrdd) {
+       private static function fixOStatus($webfinger, $lrdd, $type)
+       {
                if (empty($webfinger['links']) || empty($webfinger['subject'])) {
                        return $webfinger;
                }
@@ -453,7 +505,7 @@ class Probe {
 
                $url = self::switchScheme($webfinger['subject']);
                $path = str_replace('{uri}', urlencode($url), $lrdd);
-               $webfinger2 = self::webfinger($path);
+               $webfinger2 = self::webfinger($path, $type);
 
                // Is the new webfinger detectable as OStatus?
                if (self::ostatus($webfinger2, true)) {
@@ -468,13 +520,14 @@ class Probe {
         *
         * This function is only called by the "uri" function that adds caching and rearranging of data.
         *
-        * @param string $uri Address that should be probed
-        * @param string $network Test for this specific network
-        * @param integer $uid User ID for the probe (only used for mails)
+        * @param string  $uri     Address that should be probed
+        * @param string  $network Test for this specific network
+        * @param integer $uid     User ID for the probe (only used for mails)
         *
         * @return array uri data
         */
-       private static function detect($uri, $network, $uid) {
+       private static function detect($uri, $network, $uid)
+       {
                $parts = parse_url($uri);
 
                if (!empty($parts["scheme"]) && !empty($parts["host"]) && !empty($parts["path"])) {
@@ -486,7 +539,7 @@ class Probe {
                        if ($host == 'twitter.com') {
                                return array("network" => NETWORK_TWITTER);
                        }
-                       $lrdd = self::xrd($host);
+                       $lrdd = self::hostMeta($host);
 
                        if (is_bool($lrdd)) {
                                return array();
@@ -496,7 +549,7 @@ class Probe {
 
                        while (!$lrdd && (sizeof($path_parts) > 1)) {
                                $host .= "/".array_shift($path_parts);
-                               $lrdd = self::xrd($host);
+                               $lrdd = self::hostMeta($host);
                        }
                        if (!$lrdd) {
                                logger('No XRD data was found for '.$uri, LOGGER_DEBUG);
@@ -508,7 +561,6 @@ class Probe {
                        $nick = ltrim($nick, '@');
 
                        $addr = $nick."@".$host;
-
                } elseif (strstr($uri, '@')) {
                        // If the URI starts with "mailto:" then jump directly to the mail detection
                        if (strpos($uri, 'mailto:') !== false) {
@@ -528,7 +580,7 @@ class Probe {
                        if (strpos($uri, '@twitter.com')) {
                                return array("network" => NETWORK_TWITTER);
                        }
-                       $lrdd = self::xrd($host);
+                       $lrdd = self::hostMeta($host);
 
                        if (is_bool($lrdd)) {
                                return array();
@@ -539,7 +591,6 @@ class Probe {
                                return self::mail($uri, $uid);
                        }
                        $addr = $uri;
-
                } else {
                        logger("Uri ".$uri." was not detectable", LOGGER_DEBUG);
                        return false;
@@ -549,19 +600,17 @@ class Probe {
 
                /// @todo Do we need the prefix "acct:" or "acct://"?
 
-               foreach ($lrdd as $key => $link) {
+               foreach ($lrdd as $type => $template) {
                        if ($webfinger) {
                                continue;
                        }
-                       if (!in_array($key, array("lrdd", "lrdd-xml", "lrdd-json"))) {
-                               continue;
-                       }
+
                        // At first try it with the given uri
-                       $path = str_replace('{uri}', urlencode($uri), $link);
-                       $webfinger = self::webfinger($path);
+                       $path = str_replace('{uri}', urlencode($uri), $template);
+                       $webfinger = self::webfinger($path, $type);
 
                        // Fix possible problems with GNU Social probing to wrong scheme
-                       $webfinger = self::fixOstatus($webfinger, $link);
+                       $webfinger = self::fixOStatus($webfinger, $template, $type);
 
                        // We cannot be sure that the detected address was correct, so we don't use the values
                        if ($webfinger && ($uri != $addr)) {
@@ -571,16 +620,17 @@ class Probe {
 
                        // Try webfinger with the address (user@domain.tld)
                        if (!$webfinger) {
-                               $path = str_replace('{uri}', urlencode($addr), $link);
-                               $webfinger = self::webfinger($path);
+                               $path = str_replace('{uri}', urlencode($addr), $template);
+                               $webfinger = self::webfinger($path, $type);
                        }
 
                        // Mastodon needs to have it with "acct:"
                        if (!$webfinger) {
-                               $path = str_replace('{uri}', urlencode("acct:".$addr), $link);
-                               $webfinger = self::webfinger($path);
+                               $path = str_replace('{uri}', urlencode("acct:".$addr), $template);
+                               $webfinger = self::webfinger($path, $type);
                        }
                }
+
                if (!$webfinger) {
                        return self::feed($uri);
                }
@@ -632,36 +682,39 @@ class Probe {
         *
         * For details see RFC 7033: <https://tools.ietf.org/html/rfc7033>
         *
-        * @param string $url Address that should be probed
+        * @param string $url  Address that should be probed
+        * @param string $type type
         *
         * @return array webfinger data
         */
-       private static function webfinger($url) {
-
+       private static function webfinger($url, $type)
+       {
                $xrd_timeout = Config::get('system', 'xrd_timeout', 20);
                $redirects = 0;
 
-               $ret = z_fetch_url($url, false, $redirects, array('timeout' => $xrd_timeout, 'accept_content' => 'application/xrd+xml'));
+               $ret = z_fetch_url($url, false, $redirects, array('timeout' => $xrd_timeout, 'accept_content' => $type));
                if ($ret['errno'] == CURLE_OPERATION_TIMEDOUT) {
                        return false;
                }
                $data = $ret['body'];
 
-               $xrd = parse_xml_string($data, false);
-
-               if (!is_object($xrd)) {
-                       // If it is not XML, maybe it is JSON
-                       $webfinger = json_decode($data, true);
-
+               $webfinger = json_decode($data, true);
+               if (is_array($webfinger)) {
                        if (!isset($webfinger["links"])) {
                                logger("No json webfinger links for ".$url, LOGGER_DEBUG);
                                return false;
                        }
-
                        return $webfinger;
                }
 
-               $xrd_arr = xml::element_to_array($xrd);
+               // If it is not JSON, maybe it is XML
+               $xrd = parse_xml_string($data, false);
+               if (!is_object($xrd)) {
+                       logger("No webfinger data retrievable for ".$url, LOGGER_DEBUG);
+                       return false;
+               }
+
+               $xrd_arr = XML::elementToArray($xrd);
                if (!isset($xrd_arr["xrd"]["link"])) {
                        logger("No XML webfinger links for ".$url, LOGGER_DEBUG);
                        return false;
@@ -700,11 +753,12 @@ class Probe {
         * This functionality was originally created for the directory.
         *
         * @param string $noscrape_url Link to the noscrape page
-        * @param array $data The already fetched data
+        * @param array  $data         The already fetched data
         *
         * @return array noscrape data
         */
-       private static function pollNoscrape($noscrape_url, $data) {
+       private static function pollNoscrape($noscrape_url, $data)
+       {
                $ret = z_fetch_url($noscrape_url);
                if ($ret['errno'] == CURLE_OPERATION_TIMEDOUT) {
                        return false;
@@ -733,6 +787,10 @@ class Probe {
                        $data["nick"] = $json["nick"];
                }
 
+               if (!empty($json["guid"])) {
+                       $data["guid"] = $json["guid"];
+               }
+
                if (!empty($json["comm"])) {
                        $data["community"] = $json["comm"];
                }
@@ -744,7 +802,7 @@ class Probe {
                        }
                }
 
-               $location = formatted_location($json);
+               $location = Profile::formatLocation($json);
                if ($location) {
                        $data["location"] = $location;
                }
@@ -787,7 +845,8 @@ class Probe {
         *
         * @return int Number of errors
         */
-       public static function validDfrn($data) {
+       public static function validDfrn($data)
+       {
                $errors = 0;
                if (!isset($data['key'])) {
                        $errors ++;
@@ -814,8 +873,8 @@ class Probe {
         *
         * @return array profile data
         */
-       public static function profile($profile_link) {
-
+       public static function profile($profile_link)
+       {
                $data = array();
 
                logger("Check profile ".$profile_link, LOGGER_DEBUG);
@@ -859,8 +918,8 @@ class Probe {
         *
         * @return array DFRN data
         */
-       private static function dfrn($webfinger) {
-
+       private static function dfrn($webfinger)
+       {
                $hcard_url = "";
                $data = array();
                foreach ($webfinger["links"] as $link) {
@@ -885,14 +944,16 @@ class Probe {
 
                                //if (strstr($data["pubkey"], 'RSA ') || ($link["type"] == "RSA"))
                                if (strstr($data["pubkey"], 'RSA ')) {
-                                       $data["pubkey"] = rsatopem($data["pubkey"]);
+                                       $data["pubkey"] = Crypto::rsaToPem($data["pubkey"]);
                                }
                        }
                }
 
                if (is_array($webfinger["aliases"])) {
                        foreach ($webfinger["aliases"] as $alias) {
-                               if (substr($alias, 0, 5) == 'acct:') {
+                               if (normalise_link($alias) != normalise_link($data["url"]) && ! strstr($alias, "@")) {
+                                       $data["alias"] = $alias;
+                               } elseif (substr($alias, 0, 5) == 'acct:') {
                                        $data["addr"] = substr($alias, 5);
                                }
                        }
@@ -924,13 +985,14 @@ class Probe {
        /**
         * @brief Poll the hcard page (Diaspora and Friendica specific)
         *
-        * @param string $hcard_url Link to the hcard page
-        * @param array $data The already fetched data
-        * @param boolean $dfrn Poll DFRN specific data
+        * @param string  $hcard_url Link to the hcard page
+        * @param array   $data      The already fetched data
+        * @param boolean $dfrn      Poll DFRN specific data
         *
         * @return array hcard data
         */
-       private static function pollHcard($hcard_url, $data, $dfrn = false) {
+       private static function pollHcard($hcard_url, $data, $dfrn = false)
+       {
                $ret = z_fetch_url($hcard_url);
                if ($ret['errno'] == CURLE_OPERATION_TIMEDOUT) {
                        return false;
@@ -981,7 +1043,7 @@ class Probe {
                        if ($search->length > 0) {
                                $data["pubkey"] = $search->item(0)->nodeValue;
                                if (strstr($data["pubkey"], 'RSA ')) {
-                                       $data["pubkey"] = rsatopem($data["pubkey"]);
+                                       $data["pubkey"] = Crypto::rsaToPem($data["pubkey"]);
                                }
                        }
 
@@ -1047,8 +1109,8 @@ class Probe {
         *
         * @return array Diaspora data
         */
-       private static function diaspora($webfinger) {
-
+       private static function diaspora($webfinger)
+       {
                $hcard_url = "";
                $data = array();
                foreach ($webfinger["links"] as $link) {
@@ -1071,7 +1133,7 @@ class Probe {
 
                                //if (strstr($data["pubkey"], 'RSA ') || ($link["type"] == "RSA"))
                                if (strstr($data["pubkey"], 'RSA ')) {
-                                       $data["pubkey"] = rsatopem($data["pubkey"]);
+                                       $data["pubkey"] = Crypto::rsaToPem($data["pubkey"]);
                                }
                        }
                }
@@ -1084,10 +1146,16 @@ class Probe {
                        foreach ($webfinger["aliases"] as $alias) {
                                if (normalise_link($alias) != normalise_link($data["url"]) && ! strstr($alias, "@")) {
                                        $data["alias"] = $alias;
+                               } elseif (substr($alias, 0, 5) == 'acct:') {
+                                       $data["addr"] = substr($alias, 5);
                                }
                        }
                }
 
+               if (!empty($webfinger["subject"]) && (substr($webfinger["subject"], 0, 5) == 'acct:')) {
+                       $data["addr"] = substr($webfinger["subject"], 5);
+               }
+
                // Fetch further information from the hcard
                $data = self::pollHcard($hcard_url, $data);
 
@@ -1120,57 +1188,64 @@ class Probe {
         * @brief Check for OStatus contact
         *
         * @param array $webfinger Webfinger data
-        * @param bool $short Short detection mode
+        * @param bool  $short     Short detection mode
         *
         * @return array|bool OStatus data or "false" on error or "true" on short mode
         */
-       private static function ostatus($webfinger, $short = false) {
+       private static function ostatus($webfinger, $short = false)
+       {
                $data = array();
+
                if (is_array($webfinger["aliases"])) {
                        foreach ($webfinger["aliases"] as $alias) {
-                               if (strstr($alias, "@")) {
+                               if (strstr($alias, "@") && !strstr(normalise_link($alias), "http://")) {
                                        $data["addr"] = str_replace('acct:', '', $alias);
                                }
                        }
                }
 
-               if (is_string($webfinger["subject"]) && strstr($webfinger["subject"], "@")) {
+               if (is_string($webfinger["subject"]) && strstr($webfinger["subject"], "@")
+                       && !strstr(normalise_link($webfinger["subject"]), "http://")
+               ) {
                        $data["addr"] = str_replace('acct:', '', $webfinger["subject"]);
                }
-               $pubkey = "";
-               foreach ($webfinger["links"] as $link) {
-                       if (($link["rel"] == "http://webfinger.net/rel/profile-page")
-                               && ($link["type"] == "text/html")
-                               && ($link["href"] != "")
-                       ) {
-                               $data["url"] = $link["href"];
-                       } elseif (($link["rel"] == "salmon") && ($link["href"] != "")) {
-                               $data["notify"] = $link["href"];
-                       } elseif (($link["rel"] == NAMESPACE_FEED) && ($link["href"] != "")) {
-                               $data["poll"] = $link["href"];
-                       } elseif (($link["rel"] == "magic-public-key") && ($link["href"] != "")) {
-                               $pubkey = $link["href"];
 
-                               if (substr($pubkey, 0, 5) === 'data:') {
-                                       if (strstr($pubkey, ',')) {
-                                               $pubkey = substr($pubkey, strpos($pubkey, ',') + 1);
-                                       } else {
-                                               $pubkey = substr($pubkey, 5);
-                                       }
-                               } elseif (normalise_link($pubkey) == 'http://') {
-                                       $ret = z_fetch_url($pubkey);
-                                       if ($ret['errno'] == CURLE_OPERATION_TIMEDOUT) {
-                                               return false;
+               $pubkey = "";
+               if (is_array($webfinger["links"])) {
+                       foreach ($webfinger["links"] as $link) {
+                               if (($link["rel"] == "http://webfinger.net/rel/profile-page")
+                                       && ($link["type"] == "text/html")
+                                       && ($link["href"] != "")
+                               ) {
+                                       $data["url"] = $link["href"];
+                               } elseif (($link["rel"] == "salmon") && ($link["href"] != "")) {
+                                       $data["notify"] = $link["href"];
+                               } elseif (($link["rel"] == NAMESPACE_FEED) && ($link["href"] != "")) {
+                                       $data["poll"] = $link["href"];
+                               } elseif (($link["rel"] == "magic-public-key") && ($link["href"] != "")) {
+                                       $pubkey = $link["href"];
+
+                                       if (substr($pubkey, 0, 5) === 'data:') {
+                                               if (strstr($pubkey, ',')) {
+                                                       $pubkey = substr($pubkey, strpos($pubkey, ',') + 1);
+                                               } else {
+                                                       $pubkey = substr($pubkey, 5);
+                                               }
+                                       } elseif (normalise_link($pubkey) == 'http://') {
+                                               $ret = z_fetch_url($pubkey);
+                                               if ($ret['errno'] == CURLE_OPERATION_TIMEDOUT) {
+                                                       return false;
+                                               }
+                                               $pubkey = $ret['body'];
                                        }
-                                       $pubkey = $ret['body'];
-                               }
 
-                               $key = explode(".", $pubkey);
+                                       $key = explode(".", $pubkey);
 
-                               if (sizeof($key) >= 3) {
-                                       $m = base64url_decode($key[1]);
-                                       $e = base64url_decode($key[2]);
-                                       $data["pubkey"] = metopem($m, $e);
+                                       if (sizeof($key) >= 3) {
+                                               $m = base64url_decode($key[1]);
+                                               $e = base64url_decode($key[2]);
+                                               $data["pubkey"] = Crypto::meToPem($m, $e);
+                                       }
                                }
                        }
                }
@@ -1194,7 +1269,7 @@ class Probe {
                        return false;
                }
                $feed = $ret['body'];
-               $feed_data = feed_import($feed, $dummy1, $dummy2, $dummy3, true);
+               $feed_data = Feed::import($feed, $dummy1, $dummy2, $dummy3, true);
                if (!$feed_data) {
                        return false;
                }
@@ -1239,8 +1314,8 @@ class Probe {
         *
         * @return array profile data
         */
-       private static function pumpioProfileData($profile_link) {
-
+       private static function pumpioProfileData($profile_link)
+       {
                $doc = new DOMDocument();
                if (!@$doc->loadHTMLFile($profile_link)) {
                        return false;
@@ -1279,8 +1354,8 @@ class Probe {
         *
         * @return array pump.io data
         */
-       private static function pumpio($webfinger) {
-
+       private static function pumpio($webfinger)
+       {
                $data = array();
                foreach ($webfinger["links"] as $link) {
                        if (($link["rel"] == "http://webfinger.net/rel/profile-page")
@@ -1327,7 +1402,8 @@ class Probe {
         *
         * @return string feed link
         */
-       private static function getFeedLink($url) {
+       private static function getFeedLink($url)
+       {
                $doc = new DOMDocument();
 
                if (!@$doc->loadHTMLFile($url)) {
@@ -1365,18 +1441,19 @@ class Probe {
        /**
         * @brief Check for feed contact
         *
-        * @param string $url Profile link
+        * @param string  $url   Profile link
         * @param boolean $probe Do a probe if the page contains a feed link
         *
         * @return array feed data
         */
-       private static function feed($url, $probe = true) {
+       private static function feed($url, $probe = true)
+       {
                $ret = z_fetch_url($url);
                if ($ret['errno'] == CURLE_OPERATION_TIMEDOUT) {
                        return false;
                }
                $feed = $ret['body'];
-               $feed_data = feed_import($feed, $dummy1, $dummy2, $dummy3, true);
+               $feed_data = Feed::import($feed, $dummy1, $dummy2, $dummy3, true);
 
                if (!$feed_data) {
                        if (!$probe) {
@@ -1425,36 +1502,38 @@ class Probe {
        /**
         * @brief Check for mail contact
         *
-        * @param string $uri Profile link
+        * @param string  $uri Profile link
         * @param integer $uid User ID
         *
         * @return array mail data
         */
-       private static function mail($uri, $uid) {
-
+       private static function mail($uri, $uid)
+       {
                if (!validate_email($uri)) {
                        return false;
                }
 
-               $x = q("SELECT `prvkey` FROM `user` WHERE `uid` = %d LIMIT 1", intval($uid));
+               if ($uid != 0) {
+                       $x = q("SELECT `prvkey` FROM `user` WHERE `uid` = %d LIMIT 1", intval($uid));
 
-               $r = q("SELECT * FROM `mailacct` WHERE `uid` = %d AND `server` != '' LIMIT 1", intval($uid));
+                       $r = q("SELECT * FROM `mailacct` WHERE `uid` = %d AND `server` != '' LIMIT 1", intval($uid));
 
-               if (dbm::is_result($x) && dbm::is_result($r)) {
-                       $mailbox = construct_mailbox_name($r[0]);
-                       $password = '';
-                       openssl_private_decrypt(hex2bin($r[0]['pass']), $password, $x[0]['prvkey']);
-                       $mbox = email_connect($mailbox, $r[0]['user'], $password);
-                       if (!mbox) {
-                               return false;
+                       if (DBM::is_result($x) && DBM::is_result($r)) {
+                               $mailbox = Email::constructMailboxName($r[0]);
+                               $password = '';
+                               openssl_private_decrypt(hex2bin($r[0]['pass']), $password, $x[0]['prvkey']);
+                               $mbox = Email::connect($mailbox, $r[0]['user'], $password);
+                               if (!mbox) {
+                                       return false;
+                               }
                        }
-               }
 
-               $msgs = email_poll($mbox, $uri);
-               logger('searching '.$uri.', '.count($msgs).' messages found.', LOGGER_DEBUG);
+                       $msgs = Email::poll($mbox, $uri);
+                       logger('searching '.$uri.', '.count($msgs).' messages found.', LOGGER_DEBUG);
 
-               if (!count($msgs)) {
-                       return false;
+                       if (!count($msgs)) {
+                               return false;
+                       }
                }
 
                $phost = substr($uri, strpos($uri, '@') + 1);
@@ -1465,11 +1544,11 @@ class Probe {
                $data["name"]    = substr($uri, 0, strpos($uri, '@'));
                $data["nick"]    = $data["name"];
                $data["photo"]   = avatar_img($uri);
-               $data["url"]     = 'http://'.$phost."/".$data["nick"];
+               $data["url"]     = 'mailto:'.$uri;
                $data["notify"]  = 'smtp '.random_string();
                $data["poll"]    = 'email '.random_string();
 
-               $x = email_msg_meta($mbox, $msgs[0]);
+               $x = Email::messageMeta($mbox, $msgs[0]);
                if (stristr($x[0]->from, $uri)) {
                        $adr = imap_rfc822_parse_adrlist($x[0]->from, '');
                } elseif (stristr($x[0]->to, $uri)) {
@@ -1495,7 +1574,9 @@ class Probe {
                                }
                        }
                }
-               imap_close($mbox);
+               if (!empty($mbox)) {
+                       imap_close($mbox);
+               }
 
                return $data;
        }
@@ -1504,11 +1585,12 @@ class Probe {
         * @brief Mix two paths together to possibly fix missing parts
         *
         * @param string $avatar Path to the avatar
-        * @param string $base Another path that is hopefully complete
+        * @param string $base   Another path that is hopefully complete
         *
         * @return string fixed avatar path
         */
-       public static function fixAvatar($avatar, $base) {
+       public static function fixAvatar($avatar, $base)
+       {
                $base_parts = parse_url($base);
 
                // Remove all parts that could create a problem