Friendica Communications Platform (please note that this is a clone of the repository at github, issues are handled there) https://friendi.ca
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<?php
/**
* @file include/Probe.php
* @brief Functions for probing URL
*
*/
use Friendica\Core\Config;
use Friendica\Core\PConfig;
require_once("include/feed.php");
require_once('include/email.php');
require_once('include/network.php');
/**
* @brief This class contain functions for probing URL
*
*/
class Probe {
private static $baseurl;
/**
* @brief Rearrange the array so that it always has the same order
*
* @param array $data Unordered data
*
* @return array Ordered data
*/
private function rearrange_data($data) {
$fields = array("name", "nick", "guid", "url", "addr", "alias",
"photo", "community", "keywords", "location", "about",
"batch", "notify", "poll", "request", "confirm", "poco",
"priority", "network", "pubkey", "baseurl");
$newdata = array();
foreach ($fields AS $field)
if (isset($data[$field]))
$newdata[$field] = $data[$field];
else
$newdata[$field] = "";
// We don't use the "priority" field anymore and replace it with a dummy.
$newdata["priority"] = 0;
return $newdata;
}
/**
* @brief Probes for XRD data
*
* @return array
* 'lrdd' => Link to LRDD endpoint
* 'lrdd-xml' => Link to LRDD endpoint in XML format
* 'lrdd-json' => Link to LRDD endpoint in JSON format
*/
private function xrd($host) {
// Reset the static variable
self::$baseurl = '';
$ssl_url = "https://".$host."/.well-known/host-meta";
$url = "http://".$host."/.well-known/host-meta";
$xrd_timeout = Config::get('system','xrd_timeout', 20);
$redirects = 0;
$ret = z_fetch_url($ssl_url, false, $redirects, array('timeout' => $xrd_timeout, 'accept_content' => 'application/xrd+xml'));
if ($ret['errno'] == CURLE_OPERATION_TIMEDOUT) {
return false;
}
$xml = $ret['body'];
$xrd = parse_xml_string($xml, false);
if (!is_object($xrd)) {
$ret = z_fetch_url($url, false, $redirects, array('timeout' => $xrd_timeout, 'accept_content' => 'application/xrd+xml'));
if ($ret['errno'] == CURLE_OPERATION_TIMEDOUT) {
return false;
}
$xml = $ret['body'];
$xrd = parse_xml_string($xml, false);
}
if (!is_object($xrd))
return false;
$links = xml::element_to_array($xrd);
if (!isset($links["xrd"]["link"]))
return false;
$xrd_data = array();
foreach ($links["xrd"]["link"] AS $value => $link) {
if (isset($link["@attributes"]))
$attributes = $link["@attributes"];
elseif ($value == "@attributes")
$attributes = $link;
else
continue;
if (($attributes["rel"] == "lrdd") AND
($attributes["type"] == "application/xrd+xml"))
$xrd_data["lrdd-xml"] = $attributes["template"];
elseif (($attributes["rel"] == "lrdd") AND
($attributes["type"] == "application/json"))
$xrd_data["lrdd-json"] = $attributes["template"];
elseif ($attributes["rel"] == "lrdd")
$xrd_data["lrdd"] = $attributes["template"];
}
self::$baseurl = "http://".$host;
return $xrd_data;
}
/**
* @brief Perform Webfinger lookup and return DFRN data
*
* Given an email style address, perform webfinger lookup and
* return the resulting DFRN profile URL, or if no DFRN profile URL
* is located, returns an OStatus subscription template (prefixed
* with the string 'stat:' to identify it as on OStatus template).
* If this isn't an email style address just return $webbie.
* Return an empty string if email-style addresses but webfinger fails,
* or if the resultant personal XRD doesn't contain a supported
* subscription/friend-request attribute.
*
* 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 $hcard Link to the hcard - is returned by reference
*
* @return string profile link
*/
public static function webfinger_dfrn($webbie, &$hcard) {
$profile_link = '';
$links = self::lrdd($webbie);
logger('webfinger_dfrn: '.$webbie.':'.print_r($links,true), LOGGER_DATA);
if (count($links)) {
foreach ($links as $link) {
if ($link['@attributes']['rel'] === NAMESPACE_DFRN)
$profile_link = $link['@attributes']['href'];
if (($link['@attributes']['rel'] === NAMESPACE_OSTATUSSUB) AND ($profile_link == ""))
$profile_link = 'stat:'.$link['@attributes']['template'];
if ($link['@attributes']['rel'] === 'http://microformats.org/profile/hcard')
$hcard = $link['@attributes']['href'];
}
}
return $profile_link;
}
/**
* @brief Check an URI for LRDD data
*
* this is a replacement for the "lrdd" function in include/network.php.
* It isn't used in this class and has some redundancies in the code.
* When time comes we can check the existing calls for "lrdd" if we can rework them.
*
* @param string $uri Address that should be probed
*
* @return array uri data
*/
public static function lrdd($uri) {
$lrdd = self::xrd($uri);
if (!$lrdd) {
$parts = @parse_url($uri);
if (!$parts)
return array();
$host = $parts["host"];
$path_parts = explode("/", trim($parts["path"], "/"));
$nick = array_pop($path_parts);
do {
$lrdd = self::xrd($host);
$host .= "/".array_shift($path_parts);
} while (!$lrdd AND (sizeof($path_parts) > 0));
}
if (!$lrdd)
return array();
foreach ($lrdd AS $key => $link) {
if ($webfinger)
continue;
if (!in_array($key, array("lrdd", "lrdd-xml", "lrdd-json")))
continue;
$path = str_replace('{uri}', urlencode($uri), $link);
$webfinger = self::webfinger($path);
if (!$webfinger AND (strstr($uri, "@"))) {
$path = str_replace('{uri}', urlencode("acct:".$uri), $link);
$webfinger = self::webfinger($path);
}
// Special treatment for Mastodon
// Problem is that Mastodon uses an URL format like http://domain.tld/@nick
// But the webfinger for this format fails.
if (!$webfinger AND isset($nick)) {
// Mastodon uses a "@" as prefix for usernames in their url format
$nick = ltrim($nick, '@');
$addr = $nick."@".$host;
$path = str_replace('{uri}', urlencode("acct:".$addr), $link);
$webfinger = self::webfinger($path);
}
}
if (!is_array($webfinger["links"]))
return false;
$data = array();
foreach ($webfinger["links"] AS $link)
$data[] = array("@attributes" => $link);
if (is_array($webfinger["aliases"]))
foreach ($webfinger["aliases"] AS $alias)
$data[] = array("@attributes" =>
array("rel" => "alias",
"href" => $alias));
return $data;
}
/**
* @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 $cache Use cached values?
*
* @return array uri data
*/
public static function uri($uri, $network = "", $uid = 0, $cache = true) {
if ($cache) {
$result = Cache::get("probe_url:".$network.":".$uri);
if (!is_null($result)) {
return $result;
}
}
if ($uid == 0)
$uid = local_user();
$data = self::detect($uri, $network, $uid);
if (!isset($data["url"]))
$data["url"] = $uri;
if ($data["photo"] != "")
$data["baseurl"] = matching_url(normalise_link($data["baseurl"]), normalise_link($data["photo"]));
else
$data["photo"] = App::get_baseurl().'/images/person-175.jpg';
if (!isset($data["name"]) OR ($data["name"] == "")) {
if (isset($data["nick"]))
$data["name"] = $data["nick"];
if ($data["name"] == "")
$data["name"] = $data["url"];
}
if (!isset($data["nick"]) OR ($data["nick"] == "")) {
$data["nick"] = strtolower($data["name"]);
if (strpos($data['nick'], ' '))
$data['nick'] = trim(substr($data['nick'], 0, strpos($data['nick'], ' ')));
}
if (self::$baseurl != "") {
$data["baseurl"] = self::$baseurl;
}
if (!isset($data["network"])) {
$data["network"] = NETWORK_PHANTOM;
}
$data = self::rearrange_data($data);
// 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, $data, CACHE_DAY);
/// @todo temporary fix - we need a real contact update function that updates only changing fields
/// The biggest problem is the avatar picture that could have a reduced image size.
/// It should only be updated if the existing picture isn't existing anymore.
if (($data['network'] != NETWORK_FEED) AND ($mode == PROBE_NORMAL) AND
$data["name"] AND $data["nick"] AND $data["url"] AND $data["addr"] AND $data["poll"])
q("UPDATE `contact` SET `name` = '%s', `nick` = '%s', `url` = '%s', `addr` = '%s',
`notify` = '%s', `poll` = '%s', `alias` = '%s', `success_update` = '%s'
WHERE `nurl` = '%s' AND NOT `self` AND `uid` = 0",
dbesc($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']))
);
}
return $data;
}
/**
* @brief Fetch information (protocol endpoints and user information) about a given uri
*
* 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 $uid User ID for the probe (only used for mails)
*
* @return array uri data
*/
private function detect($uri, $network, $uid) {
$parts = parse_url($uri);
if (isset($parts["scheme"]) AND isset($parts["host"]) AND isset($parts["path"])) {
/// @todo: Ports?
$host = $parts["host"];
if ($host == 'twitter.com') {
return array("network" => NETWORK_TWITTER);
}
$lrdd = self::xrd($host);
$path_parts = explode("/", trim($parts["path"], "/"));
while (!$lrdd AND (sizeof($path_parts) > 1)) {
$host .= "/".array_shift($path_parts);
$lrdd = self::xrd($host);
}
if (!$lrdd) {
return self::feed($uri);
}
$nick = array_pop($path_parts);
// Mastodon uses a "@" as prefix for usernames in their url format
$nick = ltrim($nick, '@');
$addr = $nick."@".$host;
} elseif (strstr($uri, '@')) {
// If the URI starts with "mailto:" then jump directly to the mail detection
if (strpos($url,'mailto:') !== false) {
$uri = str_replace('mailto:', '', $url);
return self::mail($uri, $uid);
}
if ($network == NETWORK_MAIL) {
return self::mail($uri, $uid);
}
// Remove "acct:" from the URI
$uri = str_replace('acct:', '', $uri);
$host = substr($uri,strpos($uri, '@') + 1);
$nick = substr($uri,0, strpos($uri, '@'));
if (strpos($uri, '@twitter.com')) {
return array("network" => NETWORK_TWITTER);
}
$lrdd = self::xrd($host);
if (!$lrdd) {
return self::mail($uri, $uid);
}
$addr = $uri;
} else {
return false;
}
$webfinger = false;
/// @todo Do we need the prefix "acct:" or "acct://"?
foreach ($lrdd AS $key => $link) {
if ($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);
// We cannot be sure that the detected address was correct, so we don't use the values
if ($webfinger AND ($uri != $addr)) {
$nick = "";
$addr = "";
}
// Try webfinger with the address (user@domain.tld)
if (!$webfinger) {
$path = str_replace('{uri}', urlencode($addr), $link);
$webfinger = self::webfinger($path);
}
// Mastodon needs to have it with "acct:"
if (!$webfinger) {
$path = str_replace('{uri}', urlencode("acct:".$addr), $link);
$webfinger = self::webfinger($path);
}
}
if (!$webfinger) {
return self::feed($uri);
}
$result = false;
logger("Probing ".$uri, LOGGER_DEBUG);
if (in_array($network, array("", NETWORK_DFRN)))
$result = self::dfrn($webfinger);
if ((!$result AND ($network == "")) OR ($network == NETWORK_DIASPORA))
$result = self::diaspora($webfinger);
if ((!$result AND ($network == "")) OR ($network == NETWORK_OSTATUS))
$result = self::ostatus($webfinger);
if ((!$result AND ($network == "")) OR ($network == NETWORK_PUMPIO))
$result = self::pumpio($webfinger);
if ((!$result AND ($network == "")) OR ($network == NETWORK_FEED))
$result = self::feed($uri);
else {
// We overwrite the detected nick with our try if the previois routines hadn't detected it.
// Additionally it is overwritten when the nickname doesn't make sense (contains spaces).
if ((!isset($result["nick"]) OR ($result["nick"] == "") OR (strstr($result["nick"], " "))) AND ($nick != ""))
$result["nick"] = $nick;
if ((!isset($result["addr"]) OR ($result["addr"] == "")) AND ($addr != ""))
$result["addr"] = $addr;
}
logger($uri." is ".$result["network"], LOGGER_DEBUG);
if (!isset($result["baseurl"]) OR ($result["baseurl"] == "")) {
$pos = strpos($result["url"], $host);
if ($pos)
$result["baseurl"] = substr($result["url"], 0, $pos).$host;
}
return $result;
}
/**
* @brief Perform a webfinger request.
*
* For details see RFC 7033: <https://tools.ietf.org/html/rfc7033>
*
* @param string $url Address that should be probed
*
* @return array webfinger data
*/
private function webfinger($url) {
$xrd_timeout = Config::get('system','xrd_timeout', 20);
$redirects = 0;
$ret = z_fetch_url($url, false, $redirects, array('timeout' => $xrd_timeout, 'accept_content' => 'application/xrd+xml'));
if ($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);
if (!isset($webfinger["links"]))
return false;
return $webfinger;
}
$xrd_arr = xml::element_to_array($xrd);
if (!isset($xrd_arr["xrd"]["link"]))
return false;
$webfinger = array();
if (isset($xrd_arr["xrd"]["subject"]))
$webfinger["subject"] = $xrd_arr["xrd"]["subject"];
if (isset($xrd_arr["xrd"]["alias"]))
$webfinger["aliases"] = $xrd_arr["xrd"]["alias"];
$webfinger["links"] = array();
foreach ($xrd_arr["xrd"]["link"] AS $value => $data) {
if (isset($data["@attributes"]))
$attributes = $data["@attributes"];
elseif ($value == "@attributes")
$attributes = $data;
else
continue;
$webfinger["links"][] = $attributes;
}
return $webfinger;
}
/**
* @brief Poll the Friendica specific noscrape page.
*
* "noscrape" is a faster alternative to fetch the data from the hcard.
* This functionality was originally created for the directory.
*
* @param string $noscrape Link to the noscrape page
* @param array $data The already fetched data
*
* @return array noscrape data
*/
private function poll_noscrape($noscrape, $data) {
$ret = z_fetch_url($noscrape);
if ($ret['errno'] == CURLE_OPERATION_TIMEDOUT) {
return false;
}
$content = $ret['body'];
if (!$content) {
return false;
}
$json = json_decode($content, true);
if (!is_array($json))
return false;
if (isset($json["fn"]))
$data["name"] = $json["fn"];
if (isset($json["addr"]))
$data["addr"] = $json["addr"];
if (isset($json["nick"]))
$data["nick"] = $json["nick"];
if (isset($json["comm"]))
$data["community"] = $json["comm"];
if (isset($json["tags"])) {
$keywords = implode(" ", $json["tags"]);
if ($keywords != "")
$data["keywords"] = $keywords;
}
$location = formatted_location($json);
if ($location)
$data["location"] = $location;
if (isset($json["about"]))
$data["about"] = $json["about"];
if (isset($json["key"]))
$data["pubkey"] = $json["key"];
if (isset($json["photo"]))
$data["photo"] = $json["photo"];
if (isset($json["dfrn-request"]))
$data["request"] = $json["dfrn-request"];
if (isset($json["dfrn-confirm"]))
$data["confirm"] = $json["dfrn-confirm"];
if (isset($json["dfrn-notify"]))
$data["notify"] = $json["dfrn-notify"];
if (isset($json["dfrn-poll"]))
$data["poll"] = $json["dfrn-poll"];
return $data;
}
/**
* @brief Check for valid DFRN data
*
* @param array $data DFRN data
*
* @return int Number of errors
*/
public static function valid_dfrn($data) {
$errors = 0;
if(!isset($data['key']))
$errors ++;
if(!isset($data['dfrn-request']))
$errors ++;
if(!isset($data['dfrn-confirm']))
$errors ++;
if(!isset($data['dfrn-notify']))
$errors ++;
if(!isset($data['dfrn-poll']))
$errors ++;
return $errors;
}
/**
* @brief Fetch data from a DFRN profile page and via "noscrape"
*
* @param string $profile Link to the profile page
*
* @return array profile data
*/
public static function profile($profile) {
$data = array();
logger("Check profile ".$profile, LOGGER_DEBUG);
// Fetch data via noscrape - this is faster
$noscrape = str_replace(array("/hcard/", "/profile/"), "/noscrape/", $profile);
$data = self::poll_noscrape($noscrape, $data);
if (!isset($data["notify"]) OR !isset($data["confirm"]) OR
!isset($data["request"]) OR !isset($data["poll"]) OR
!isset($data["poco"]) OR !isset($data["name"]) OR
!isset($data["photo"]))
$data = self::poll_hcard($profile, $data, true);
$prof_data = array();
$prof_data["addr"] = $data["addr"];
$prof_data["nick"] = $data["nick"];
$prof_data["dfrn-request"] = $data["request"];
$prof_data["dfrn-confirm"] = $data["confirm"];
$prof_data["dfrn-notify"] = $data["notify"];
$prof_data["dfrn-poll"] = $data["poll"];
$prof_data["dfrn-poco"] = $data["poco"];
$prof_data["photo"] = $data["photo"];
$prof_data["fn"] = $data["name"];
$prof_data["key"] = $data["pubkey"];
logger("Result for profile ".$profile.": ".print_r($prof_data, true), LOGGER_DEBUG);
return $prof_data;
}
/**
* @brief Check for DFRN contact
*
* @param array $webfinger Webfinger data
*
* @return array DFRN data
*/
private function dfrn($webfinger) {
$hcard = "";
$data = array();
foreach ($webfinger["links"] AS $link) {
if (($link["rel"] == NAMESPACE_DFRN) AND ($link["href"] != ""))
$data["network"] = NETWORK_DFRN;
elseif (($link["rel"] == NAMESPACE_FEED) AND ($link["href"] != ""))
$data["poll"] = $link["href"];
elseif (($link["rel"] == "http://webfinger.net/rel/profile-page") AND
($link["type"] == "text/html") AND ($link["href"] != ""))
$data["url"] = $link["href"];
elseif (($link["rel"] == "http://microformats.org/profile/hcard") AND ($link["href"] != ""))
$hcard = $link["href"];
elseif (($link["rel"] == NAMESPACE_POCO) AND ($link["href"] != ""))
$data["poco"] = $link["href"];
elseif (($link["rel"] == "http://webfinger.net/rel/avatar") AND ($link["href"] != ""))
$data["photo"] = $link["href"];
elseif (($link["rel"] == "http://joindiaspora.com/seed_location") AND ($link["href"] != ""))
$data["baseurl"] = trim($link["href"], '/');
elseif (($link["rel"] == "http://joindiaspora.com/guid") AND ($link["href"] != ""))
$data["guid"] = $link["href"];
elseif (($link["rel"] == "diaspora-public-key") AND ($link["href"] != "")) {
$data["pubkey"] = base64_decode($link["href"]);
//if (strstr($data["pubkey"], 'RSA ') OR ($link["type"] == "RSA"))
if (strstr($data["pubkey"], 'RSA '))
$data["pubkey"] = rsatopem($data["pubkey"]);
}
}
if (!isset($data["network"]) OR ($hcard == ""))
return false;
// Fetch data via noscrape - this is faster
$noscrape = str_replace("/hcard/", "/noscrape/", $hcard);
$data = self::poll_noscrape($noscrape, $data);
if (isset($data["notify"]) AND isset($data["confirm"]) AND isset($data["request"]) AND
isset($data["poll"]) AND isset($data["name"]) AND isset($data["photo"]))
return $data;
$data = self::poll_hcard($hcard, $data, true);
return $data;
}
/**
* @brief Poll the hcard page (Diaspora and Friendica specific)
*
* @param string $hcard Link to the hcard page
* @param array $data The already fetched data
* @param boolean $dfrn Poll DFRN specific data
*
* @return array hcard data
*/
private function poll_hcard($hcard, $data, $dfrn = false) {
$ret = z_fetch_url($hcard);
if ($ret['errno'] == CURLE_OPERATION_TIMEDOUT) {
return false;
}
$content = $ret['body'];
if (!$content) {
return false;
}
$doc = new DOMDocument();
if (!@$doc->loadHTML($content))
return false;
$xpath = new DomXPath($doc);
$vcards = $xpath->query("//div[contains(concat(' ', @class, ' '), ' vcard ')]");
if (!is_object($vcards))
return false;
if ($vcards->length > 0) {
$vcard = $vcards->item(0);
// We have to discard the guid from the hcard in favour of the guid from lrdd
// Reason: Hubzilla doesn't use the value "uid" in the hcard like Diaspora does.
$search = $xpath->query("//*[contains(concat(' ', @class, ' '), ' uid ')]", $vcard); // */
if (($search->length > 0) AND ($data["guid"] == ""))
$data["guid"] = $search->item(0)->nodeValue;
$search = $xpath->query("//*[contains(concat(' ', @class, ' '), ' nickname ')]", $vcard); // */
if ($search->length > 0)
$data["nick"] = $search->item(0)->nodeValue;
$search = $xpath->query("//*[contains(concat(' ', @class, ' '), ' fn ')]", $vcard); // */
if ($search->length > 0)
$data["name"] = $search->item(0)->nodeValue;
$search = $xpath->query("//*[contains(concat(' ', @class, ' '), ' searchable ')]", $vcard); // */
if ($search->length > 0)
$data["searchable"] = $search->item(0)->nodeValue;
$search = $xpath->query("//*[contains(concat(' ', @class, ' '), ' key ')]", $vcard); // */
if ($search->length > 0) {
$data["pubkey"] = $search->item(0)->nodeValue;
if (strstr($data["pubkey"], 'RSA '))
$data["pubkey"] = rsatopem($data["pubkey"]);
}
$search = $xpath->query("//*[@id='pod_location']", $vcard); // */
if ($search->length > 0)
$data["baseurl"] = trim($search->item(0)->nodeValue, "/");
}
$avatar = array();
$photos = $xpath->query("//*[contains(concat(' ', @class, ' '), ' photo ') or contains(concat(' ', @class, ' '), ' avatar ')]", $vcard); // */
foreach ($photos AS $photo) {
$attr = array();
foreach ($photo->attributes as $attribute) {
$attr[$attribute->name] = trim($attribute->value);
}
if (isset($attr["src"]) AND isset($attr["width"])) {
$avatar[$attr["width"]] = $attr["src"];
}
// We don't have a width. So we just take everything that we got.
// This is a Hubzilla workaround which doesn't send a width.
if ((sizeof($avatar) == 0) AND isset($attr["src"])) {
$avatar[] = $attr["src"];
}
}
if (sizeof($avatar)) {
ksort($avatar);
$data["photo"] = array_pop($avatar);
}
if ($dfrn) {
// Poll DFRN specific data
$search = $xpath->query("//link[contains(concat(' ', @rel), ' dfrn-')]");
if ($search->length > 0) {
foreach ($search AS $link) {
//$data["request"] = $search->item(0)->nodeValue;
$attr = array();
foreach ($link->attributes as $attribute)
$attr[$attribute->name] = trim($attribute->value);
$data[substr($attr["rel"], 5)] = $attr["href"];
}
}
// Older Friendica versions had used the "uid" field differently than newer versions
if ($data["nick"] == $data["guid"])
unset($data["guid"]);
}
return $data;
}
/**
* @brief Check for Diaspora contact
*
* @param array $webfinger Webfinger data
*
* @return array Diaspora data
*/
private function diaspora($webfinger) {
$hcard = "";
$data = array();
foreach ($webfinger["links"] AS $link) {
if (($link["rel"] == "http://microformats.org/profile/hcard") AND ($link["href"] != ""))
$hcard = $link["href"];
elseif (($link["rel"] == "http://joindiaspora.com/seed_location") AND ($link["href"] != ""))
$data["baseurl"] = trim($link["href"], '/');
elseif (($link["rel"] == "http://joindiaspora.com/guid") AND ($link["href"] != ""))
$data["guid"] = $link["href"];
elseif (($link["rel"] == "http://webfinger.net/rel/profile-page") AND
($link["type"] == "text/html") AND ($link["href"] != ""))
$data["url"] = $link["href"];
elseif (($link["rel"] == NAMESPACE_FEED) AND ($link["href"] != ""))
$data["poll"] = $link["href"];
elseif (($link["rel"] == NAMESPACE_POCO) AND ($link["href"] != ""))
$data["poco"] = $link["href"];
elseif (($link["rel"] == "salmon") AND ($link["href"] != ""))
$data["notify"] = $link["href"];
elseif (($link["rel"] == "diaspora-public-key") AND ($link["href"] != "")) {
$data["pubkey"] = base64_decode($link["href"]);
//if (strstr($data["pubkey"], 'RSA ') OR ($link["type"] == "RSA"))
if (strstr($data["pubkey"], 'RSA '))
$data["pubkey"] = rsatopem($data["pubkey"]);
}
}
if (!isset($data["url"]) OR ($hcard == ""))
return false;
if (is_array($webfinger["aliases"]))
foreach ($webfinger["aliases"] AS $alias)
if (normalise_link($alias) != normalise_link($data["url"]) AND !strstr($alias, "@"))
$data["alias"] = $alias;
// Fetch further information from the hcard
$data = self::poll_hcard($hcard, $data);
if (!$data)
return false;
if (isset($data["url"]) AND isset($data["guid"]) AND isset($data["baseurl"]) AND
isset($data["pubkey"]) AND ($hcard != "")) {
$data["network"] = NETWORK_DIASPORA;
// The Diaspora handle must always be lowercase
$data["addr"] = strtolower($data["addr"]);
// We have to overwrite the detected value for "notify" since Hubzilla doesn't send it
$data["notify"] = $data["baseurl"]."/receive/users/".$data["guid"];
$data["batch"] = $data["baseurl"]."/receive/public";
} else
return false;
return $data;
}
/**
* @brief Check for OStatus contact
*
* @param array $webfinger Webfinger data
*
* @return array OStatus data
*/
private function ostatus($webfinger) {
$data = array();
if (is_array($webfinger["aliases"])) {
foreach ($webfinger["aliases"] AS $alias) {
if (strstr($alias, "@")) {
$data["addr"] = str_replace('acct:', '', $alias);
}
}
}
if (is_string($webfinger["subject"]) AND strstr($webfinger["subject"], "@")) {
$data["addr"] = str_replace('acct:', '', $webfinger["subject"]);
}
$pubkey = "";
foreach ($webfinger["links"] AS $link) {
if (($link["rel"] == "http://webfinger.net/rel/profile-page") AND
($link["type"] == "text/html") AND ($link["href"] != "")) {
$data["url"] = $link["href"];
} elseif (($link["rel"] == "salmon") AND ($link["href"] != "")) {
$data["notify"] = $link["href"];
} elseif (($link["rel"] == NAMESPACE_FEED) AND ($link["href"] != "")) {
$data["poll"] = $link["href"];
} elseif (($link["rel"] == "magic-public-key") AND ($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'];
}
$key = explode(".", $pubkey);
if (sizeof($key) >= 3) {
$m = base64url_decode($key[1]);
$e = base64url_decode($key[2]);
$data["pubkey"] = metopem($m,$e);
}
}
}
if (isset($data["notify"]) AND isset($data["pubkey"]) AND
isset($data["poll"]) AND isset($data["url"])) {
$data["network"] = NETWORK_OSTATUS;
} else {
return false;
}
// Fetch all additional data from the feed
$ret = z_fetch_url($data["poll"]);
if ($ret['errno'] == CURLE_OPERATION_TIMEDOUT) {
return false;
}
$feed = $ret['body'];
$feed_data = feed_import($feed,$dummy1,$dummy2, $dummy3, true);
if (!$feed_data) {
return false;
}
if ($feed_data["header"]["author-name"] != "") {
$data["name"] = $feed_data["header"]["author-name"];
}
if ($feed_data["header"]["author-nick"] != "") {
$data["nick"] = $feed_data["header"]["author-nick"];
}
if ($feed_data["header"]["author-avatar"] != "") {
$data["photo"] = ostatus::fix_avatar($feed_data["header"]["author-avatar"], $data["url"]);
}
if ($feed_data["header"]["author-id"] != "") {
$data["alias"] = $feed_data["header"]["author-id"];
}
if ($feed_data["header"]["author-location"] != "") {
$data["location"] = $feed_data["header"]["author-location"];
}
if ($feed_data["header"]["author-about"] != "") {
$data["about"] = $feed_data["header"]["author-about"];
}
// OStatus has serious issues when the the url doesn't fit (ssl vs. non ssl)
// So we take the value that we just fetched, although the other one worked as well
if ($feed_data["header"]["author-link"] != "") {
$data["url"] = $feed_data["header"]["author-link"];
}
/// @todo Fetch location and "about" from the feed as well
return $data;
}
/**
* @brief Fetch data from a pump.io profile page
*
* @param string $profile Link to the profile page
*
* @return array profile data
*/
private function pumpio_profile_data($profile) {
$doc = new DOMDocument();
if (!@$doc->loadHTMLFile($profile))
return false;
$xpath = new DomXPath($doc);
$data = array();
// This is ugly - but pump.io doesn't seem to know a better way for it
$data["name"] = trim($xpath->query("//h1[@class='media-header']")->item(0)->nodeValue);
$pos = strpos($data["name"], chr(10));
if ($pos)
$data["name"] = trim(substr($data["name"], 0, $pos));
$avatar = $xpath->query("//img[@class='img-rounded media-object']")->item(0);
if ($avatar)
foreach ($avatar->attributes as $attribute)
if ($attribute->name == "src")
$data["photo"] = trim($attribute->value);
$data["location"] = $xpath->query("//p[@class='location']")->item(0)->nodeValue;
$data["about"] = $xpath->query("//p[@class='summary']")->item(0)->nodeValue;
return $data;
}
/**
* @brief Check for pump.io contact
*
* @param array $webfinger Webfinger data
*
* @return array pump.io data
*/
private function pumpio($webfinger) {
$data = array();
foreach ($webfinger["links"] AS $link) {
if (($link["rel"] == "http://webfinger.net/rel/profile-page") AND
($link["type"] == "text/html") AND ($link["href"] != ""))
$data["url"] = $link["href"];
elseif (($link["rel"] == "activity-inbox") AND ($link["href"] != ""))
$data["notify"] = $link["href"];
elseif (($link["rel"] == "activity-outbox") AND ($link["href"] != ""))
$data["poll"] = $link["href"];
elseif (($link["rel"] == "dialback") AND ($link["href"] != ""))
$data["dialback"] = $link["href"];
}
if (isset($data["poll"]) AND isset($data["notify"]) AND
isset($data["dialback"]) AND isset($data["url"])) {
// by now we use these fields only for the network type detection
// So we unset all data that isn't used at the moment
unset($data["dialback"]);
$data["network"] = NETWORK_PUMPIO;
} else
return false;
$profile_data = self::pumpio_profile_data($data["url"]);
if (!$profile_data)
return false;
$data = array_merge($data, $profile_data);
return $data;
}
/**
* @brief Check page for feed link
*
* @param string $url Page link
*
* @return string feed link
*/
private function get_feed_link($url) {
$doc = new DOMDocument();
if (!@$doc->loadHTMLFile($url))
return false;
$xpath = new DomXPath($doc);
//$feeds = $xpath->query("/html/head/link[@type='application/rss+xml']");
$feeds = $xpath->query("/html/head/link[@type='application/rss+xml' and @rel='alternate']");
if (!is_object($feeds))
return false;
if ($feeds->length == 0)
return false;
$feed_url = "";
foreach ($feeds AS $feed) {
$attr = array();
foreach ($feed->attributes as $attribute)
$attr[$attribute->name] = trim($attribute->value);
if ($feed_url == "")
$feed_url = $attr["href"];
}
return $feed_url;
}
/**
* @brief Check for feed contact
*
* @param string $url Profile link
* @param boolean $probe Do a probe if the page contains a feed link
*
* @return array feed data
*/
private function feed($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, $dummy3, true);
if (!$feed_data) {
if (!$probe)
return false;
$feed_url = self::get_feed_link($url);
if (!$feed_url)
return false;
return self::feed($feed_url, false);
}
if ($feed_data["header"]["author-name"] != "")
$data["name"] = $feed_data["header"]["author-name"];
if ($feed_data["header"]["author-nick"] != "")
$data["nick"] = $feed_data["header"]["author-nick"];
if ($feed_data["header"]["author-avatar"] != "")
$data["photo"] = $feed_data["header"]["author-avatar"];
if ($feed_data["header"]["author-id"] != "")
$data["alias"] = $feed_data["header"]["author-id"];
$data["url"] = $url;
$data["poll"] = $url;
if ($feed_data["header"]["author-link"] != "")
$data["baseurl"] = $feed_data["header"]["author-link"];
else
$data["baseurl"] = $data["url"];
$data["network"] = NETWORK_FEED;
return $data;
}
/**
* @brief Check for mail contact
*
* @param string $uri Profile link
* @param integer $uid User ID
*
* @return array mail data
*/
private function mail($uri, $uid) {
if (!validate_email($uri))
return false;
$x = q("SELECT `prvkey` FROM `user` WHERE `uid` = %d LIMIT 1", intval($uid));
$r = q("SELECT * FROM `mailacct` WHERE `uid` = %d AND `server` != '' LIMIT 1", intval($uid));
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;
}
$msgs = email_poll($mbox, $uri);
logger('searching '.$uri.', '.count($msgs).' messages found.', LOGGER_DEBUG);
if (!count($msgs))
return false;
$data = array();
$data["addr"] = $uri;
$data["network"] = NETWORK_MAIL;
$data["name"] = substr($uri, 0, strpos($uri,'@'));
$data["nick"] = $data["name"];
$data["photo"] = avatar_img($uri);
$phost = substr($uri, strpos($uri,'@') + 1);
$data["url"] = 'http://'.$phost."/".$data["nick"];
$data["notify"] = 'smtp '.random_string();
$data["poll"] = 'email '.random_string();
$x = email_msg_meta($mbox, $msgs[0]);
if(stristr($x[0]->from, $uri))
$adr = imap_rfc822_parse_adrlist($x[0]->from, '');
elseif(stristr($x[0]->to, $uri))
$adr = imap_rfc822_parse_adrlist($x[0]->to, '');
if(isset($adr)) {
foreach($adr as $feadr) {
if((strcasecmp($feadr->mailbox, $data["name"]) == 0)
&&(strcasecmp($feadr->host, $phost) == 0)
&& (strlen($feadr->personal))) {
$personal = imap_mime_header_decode($feadr->personal);
$data["name"] = "";
foreach($personal as $perspart)
if ($perspart->charset != "default")
$data["name"] .= iconv($perspart->charset, 'UTF-8//IGNORE', $perspart->text);
else
$data["name"] .= $perspart->text;
$data["name"] = notags($data["name"]);
}
}
}
imap_close($mbox);
return $data;
}
}
?>