Merge pull request #7062 from nupplaphil/task/mod_hostxrd

Move mod/_well_known to src/Module/WellKnown/*
This commit is contained in:
Hypolite Petovan 2019-05-02 09:10:51 -04:00 committed by GitHub
commit 1b32270237
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13 changed files with 452 additions and 313 deletions

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@ -1,82 +0,0 @@
<?php
use Friendica\App;
use Friendica\Core\Config;
use Friendica\Core\System;
use Friendica\Module\Nodeinfo;
require_once 'mod/hostxrd.php';
require_once 'mod/xrd.php';
function _well_known_init(App $a)
{
if ($a->argc > 1) {
switch ($a->argv[1]) {
case "host-meta":
hostxrd_init($a);
break;
case "x-social-relay":
wk_social_relay();
break;
case "nodeinfo":
Nodeinfo::printWellKnown($a);
break;
case "webfinger":
xrd_init($a);
break;
}
}
System::httpExit(404);
}
function wk_social_relay()
{
$subscribe = (bool) Config::get('system', 'relay_subscribe', false);
if ($subscribe) {
$scope = Config::get('system', 'relay_scope', SR_SCOPE_ALL);
} else {
$scope = SR_SCOPE_NONE;
}
$tags = [];
if ($scope == SR_SCOPE_TAGS) {
$server_tags = Config::get('system', 'relay_server_tags');
$tagitems = explode(",", $server_tags);
/// @todo Check if it was better to use "strtolower" on the tags
foreach ($tagitems AS $tag) {
$tag = trim($tag, "# ");
$tags[$tag] = $tag;
}
if (Config::get('system', 'relay_user_tags')) {
$terms = q("SELECT DISTINCT(`term`) FROM `search`");
foreach ($terms AS $term) {
$tag = trim($term["term"], "#");
$tags[$tag] = $tag;
}
}
}
$taglist = [];
foreach ($tags AS $tag) {
if (!empty($tag)) {
$taglist[] = $tag;
}
}
$relay = [
'subscribe' => $subscribe,
'scope' => $scope,
'tags' => $taglist,
'protocols' => ['diaspora' => ['receive' => System::baseUrl() . '/receive/public'],
'dfrn' => ['receive' => System::baseUrl() . '/dfrn_notify']]
];
header('Content-type: application/json; charset=utf-8');
echo json_encode($relay, JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES);
exit;
}

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@ -1,34 +0,0 @@
<?php
/**
* @file mod/hostxrd.php
*/
use Friendica\App;
use Friendica\Core\Config;
use Friendica\Core\Renderer;
use Friendica\Core\System;
use Friendica\Protocol\Salmon;
use Friendica\Util\Crypto;
function hostxrd_init(App $a)
{
header('Access-Control-Allow-Origin: *');
header("Content-type: text/xml");
$pubkey = Config::get('system', 'site_pubkey');
if (! $pubkey) {
$res = Crypto::newKeypair(1024);
Config::set('system','site_prvkey', $res['prvkey']);
Config::set('system','site_pubkey', $res['pubkey']);
}
$tpl = Renderer::getMarkupTemplate('xrd_host.tpl');
echo Renderer::replaceMacros($tpl, [
'$zhost' => $a->getHostName(),
'$zroot' => System::baseUrl(),
'$domain' => System::baseUrl(),
'$bigkey' => Salmon::salmonKey(Config::get('system', 'site_pubkey'))]
);
exit();
}

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@ -1,42 +0,0 @@
<?php
/**
* @file mod/webfinger.php
*/
use Friendica\App;
use Friendica\Core\L10n;
use Friendica\Core\System;
use Friendica\Network\Probe;
function webfinger_content(App $a)
{
if (!local_user()) {
System::httpExit(
403,
[
"title" => L10n::t("Public access denied."),
"description" => L10n::t("Only logged in users are permitted to perform a probing.")
]
);
exit();
}
$o = '<div class="generic-page-wrapper">';
$o .= '<h3>Webfinger Diagnostic</h3>';
$o .= '<form action="webfinger" method="get">';
$o .= 'Lookup address: <input type="text" style="width: 250px;" name="addr" value="' . defaults($_GET, 'addr', '') .'" />';
$o .= '<input type="submit" name="submit" value="Submit" /></form>';
$o .= '<br /><br />';
if (!empty($_GET['addr'])) {
$addr = trim($_GET['addr']);
$res = Probe::lrdd($addr);
$o .= '<pre>';
$o .= str_replace("\n", '<br />', print_r($res, true));
$o .= '</pre>';
}
$o .= '</div>';
return $o;
}

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@ -1,134 +0,0 @@
<?php
/**
* @file mod/xrd.php
*/
use Friendica\App;
use Friendica\Core\Hook;
use Friendica\Core\Renderer;
use Friendica\Core\System;
use Friendica\Database\DBA;
use Friendica\Protocol\Salmon;
use Friendica\Util\Strings;
function xrd_init(App $a)
{
if ($a->argv[0] == 'xrd') {
if (empty($_GET['uri'])) {
System::httpExit(404);
}
$uri = urldecode(Strings::escapeTags(trim($_GET['uri'])));
if (defaults($_SERVER, 'HTTP_ACCEPT', '') == 'application/jrd+json') {
$mode = 'json';
} else {
$mode = 'xml';
}
} else {
if (empty($_GET['resource'])) {
System::httpExit(404);
}
$uri = urldecode(Strings::escapeTags(trim($_GET['resource'])));
if (defaults($_SERVER, 'HTTP_ACCEPT', '') == 'application/xrd+xml') {
$mode = 'xml';
} else {
$mode = 'json';
}
}
if (substr($uri, 0, 4) === 'http') {
$name = ltrim(basename($uri), '~');
} else {
$local = str_replace('acct:', '', $uri);
if (substr($local, 0, 2) == '//') {
$local = substr($local, 2);
}
$name = substr($local, 0, strpos($local, '@'));
}
$user = DBA::selectFirst('user', [], ['nickname' => $name]);
if (!DBA::isResult($user)) {
System::httpExit(404);
}
$profile_url = System::baseUrl().'/profile/'.$user['nickname'];
$alias = str_replace('/profile/', '/~', $profile_url);
$addr = 'acct:'.$user['nickname'].'@'.$a->getHostName();
if ($a->getURLPath()) {
$addr .= '/'.$a->getURLPath();
}
if ($mode == 'xml') {
xrd_xml($addr, $alias, $profile_url, $user);
} else {
xrd_json($addr, $alias, $profile_url, $user);
}
}
function xrd_json($uri, $alias, $profile_url, $r)
{
$salmon_key = Salmon::salmonKey($r['spubkey']);
header('Access-Control-Allow-Origin: *');
header("Content-type: application/json; charset=utf-8");
$json = ['subject' => $uri,
'aliases' => [$alias, $profile_url],
'links' => [
['rel' => NAMESPACE_DFRN, 'href' => $profile_url],
['rel' => NAMESPACE_FEED, 'type' => 'application/atom+xml', 'href' => System::baseUrl().'/dfrn_poll/'.$r['nickname']],
['rel' => 'http://webfinger.net/rel/profile-page', 'type' => 'text/html', 'href' => $profile_url],
['rel' => 'self', 'type' => 'application/activity+json', 'href' => $profile_url],
['rel' => 'http://microformats.org/profile/hcard', 'type' => 'text/html', 'href' => System::baseUrl().'/hcard/'.$r['nickname']],
['rel' => NAMESPACE_POCO, 'href' => System::baseUrl().'/poco/'.$r['nickname']],
['rel' => 'http://webfinger.net/rel/avatar', 'type' => 'image/jpeg', 'href' => System::baseUrl().'/photo/profile/'.$r['uid'].'.jpg'],
['rel' => 'http://joindiaspora.com/seed_location', 'type' => 'text/html', 'href' => System::baseUrl()],
['rel' => 'salmon', 'href' => System::baseUrl().'/salmon/'.$r['nickname']],
['rel' => 'http://salmon-protocol.org/ns/salmon-replies', 'href' => System::baseUrl().'/salmon/'.$r['nickname']],
['rel' => 'http://salmon-protocol.org/ns/salmon-mention', 'href' => System::baseUrl().'/salmon/'.$r['nickname'].'/mention'],
['rel' => 'http://ostatus.org/schema/1.0/subscribe', 'template' => System::baseUrl().'/follow?url={uri}'],
['rel' => 'magic-public-key', 'href' => 'data:application/magic-public-key,'.$salmon_key],
['rel' => 'http://purl.org/openwebauth/v1', 'type' => 'application/x-zot+json', 'href' => System::baseUrl().'/owa']
]
];
echo json_encode($json);
exit();
}
function xrd_xml($uri, $alias, $profile_url, $r)
{
$salmon_key = Salmon::salmonKey($r['spubkey']);
header('Access-Control-Allow-Origin: *');
header("Content-type: text/xml");
$tpl = Renderer::getMarkupTemplate('xrd_person.tpl');
$o = Renderer::replaceMacros($tpl, [
'$nick' => $r['nickname'],
'$accturi' => $uri,
'$alias' => $alias,
'$profile_url' => $profile_url,
'$hcard_url' => System::baseUrl() . '/hcard/' . $r['nickname'],
'$atom' => System::baseUrl() . '/dfrn_poll/' . $r['nickname'],
'$poco_url' => System::baseUrl() . '/poco/' . $r['nickname'],
'$photo' => System::baseUrl() . '/photo/profile/' . $r['uid'] . '.jpg',
'$baseurl' => System::baseUrl(),
'$salmon' => System::baseUrl() . '/salmon/' . $r['nickname'],
'$salmen' => System::baseUrl() . '/salmon/' . $r['nickname'] . '/mention',
'$subscribe' => System::baseUrl() . '/follow?url={uri}',
'$openwebauth' => System::baseUrl() . '/owa',
'$modexp' => 'data:application/magic-public-key,' . $salmon_key]
);
$arr = ['user' => $r, 'xml' => $o];
Hook::callAll('personal_xrd', $arr);
echo $arr['xml'];
exit();
}

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@ -42,6 +42,12 @@ class Router
{
$this->routeCollector->addRoute(['GET', 'POST'], '/itemsource[/{guid}]', Module\Itemsource::class);
$this->routeCollector->addRoute(['GET'], '/amcd', Module\AccountManagementControlDocument::class);
$this->routeCollector->addGroup('/.well-known', function (RouteCollector $collector) {
$collector->addRoute(['GET'], '/host-meta' , Module\WellKnown\HostMeta::class);
$collector->addRoute(['GET'], '/nodeinfo[/1.0]' , Module\NodeInfo::class);
$collector->addRoute(['GET'], '/webfinger' , Module\Xrd::class);
$collector->addRoute(['GET'], '/x-social-relay' , Module\WellKnown\XSocialRelay::class);
});
$this->routeCollector->addRoute(['GET'], '/acctlink', Module\Acctlink::class);
$this->routeCollector->addRoute(['GET'], '/apps', Module\Apps::class);
$this->routeCollector->addRoute(['GET'], '/attach/{item:\d+}', Module\Attach::class);
@ -83,6 +89,7 @@ class Router
$this->routeCollector->addRoute(['GET', 'POST'], '/login', Module\Login::class);
$this->routeCollector->addRoute(['GET'], '/magic', Module\Magic::class);
$this->routeCollector->addRoute(['GET'], '/manifest', Module\Manifest::class);
$this->routeCollector->addRoute(['GET'], '/nodeinfo/1.0', Module\NodeInfo::class);
$this->routeCollector->addRoute(['GET'], '/objects/{guid}', Module\Objects::class);
$this->routeCollector->addGroup('/oembed', function (RouteCollector $collector) {
$collector->addRoute(['GET'], '/[b2h|h2b]', Module\Oembed::class);
@ -108,6 +115,8 @@ class Router
$this->routeCollector->addRoute(['GET', 'POST'], '/register', Module\Register::class);
$this->routeCollector->addRoute(['GET'], '/statistics.json', Module\Statistics::class);
$this->routeCollector->addRoute(['GET'], '/tos', Module\Tos::class);
$this->routeCollector->addRoute(['GET'], '/webfinger', Module\WebFinger::class);
$this->routeCollector->addRoute(['GET'], '/xrd', Module\Xrd::class);
}
public function __construct(RouteCollector $routeCollector = null)

32
src/Model/Search.php Normal file
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@ -0,0 +1,32 @@
<?php
namespace Friendica\Model;
use Friendica\BaseObject;
use Friendica\Database\DBA;
/**
* Model for DB specific logic for the search entity
*/
class Search extends BaseObject
{
/**
* Returns the list of user defined tags (e.g. #Friendica)
*
* @return array
*
* @throws \Exception
*/
public static function getUserTags()
{
$termsStmt = DBA::p("SELECT DISTINCT(`term`) FROM `search`");
$tags = [];
while ($term = DBA::fetch($termsStmt)) {
$tags[] = trim($term['term'], '#');
}
return $tags;
}
}

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@ -91,12 +91,24 @@ class User
/**
* @param integer $uid
* @param array $fields
* @return array|boolean User record if it exists, false otherwise
* @throws Exception
*/
public static function getById($uid)
public static function getById($uid, array $fields = [])
{
return DBA::selectFirst('user', [], ['uid' => $uid]);
return DBA::selectFirst('user', $fields, ['uid' => $uid]);
}
/**
* @param string $nickname
* @param array $fields
* @return array|boolean User record if it exists, false otherwise
* @throws Exception
*/
public static function getByNickname($nickname, array $fields = [])
{
return DBA::selectFirst('user', $fields, ['nickname' => $nickname]);
}
/**

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@ -8,18 +8,42 @@ use Friendica\Core\Addon;
use Friendica\Core\System;
/**
* Prints infos about the current node
* Standardized way of exposing metadata about a server running one of the distributed social networks.
* @see https://github.com/jhass/nodeinfo/blob/master/PROTOCOL.md
*/
class Nodeinfo extends BaseModule
class NodeInfo extends BaseModule
{
public static function init()
{
$config = self::getApp()->getConfig();
if (!$config->get('system', 'nodeinfo')) {
System::httpExit(404);
}
}
public static function rawContent()
{
$app = self::getApp();
// @TODO: Replace with parameter from router
// if the first argument is ".well-known", print the well-known text
if (($app->argc > 1) && ($app->argv[0] == '.well-known')) {
self::printWellKnown($app);
// otherwise print the nodeinfo
} else {
self::printNodeInfo($app);
}
}
/**
* Prints the Nodeinfo for a well-known request
* Prints the well-known nodeinfo redirect
*
* @param App $app
*
* @throws \Friendica\Network\HTTPException\InternalServerErrorException
*/
public static function printWellKnown(App $app)
private static function printWellKnown(App $app)
{
$config = $app->getConfig();
@ -38,24 +62,15 @@ class Nodeinfo extends BaseModule
exit;
}
public static function init()
/**
* Print the nodeinfo
*
* @param App $app
*/
private static function printNodeInfo(App $app)
{
$app = self::getApp();
$config = $app->getConfig();
if (!$config->get('system', 'nodeinfo')) {
System::httpExit(404);
}
if (($app->argc != 2) || ($app->argv[1] != '1.0')) {
System::httpExit(404);
}
}
public static function rawContent()
{
$config = self::getApp()->getConfig();
$smtp = (function_exists('imap_open') && !$config->get('system', 'imap_disabled') && !$config->get('system', 'dfrn_only'));
$nodeinfo = [

48
src/Module/WebFinger.php Normal file
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@ -0,0 +1,48 @@
<?php
namespace Friendica\Module;
use Friendica\BaseModule;
use Friendica\Core\L10n;
use Friendica\Core\Renderer;
use Friendica\Core\System;
use Friendica\Network\Probe;
/**
* Web based module to perform webfinger probing
*/
class WebFinger extends BaseModule
{
public static function init()
{
if (!local_user()) {
System::httpExit(
403,
[
'title' => L10n::t('Public access denied.'),
'description' => L10n::t('Only logged in users are permitted to perform a probing.'),
],
);
exit();
}
}
public static function content()
{
$app = self::getApp();
$addr = defaults($_GET, 'addr', '');
$res = '';
if (!empty($addr)) {
$res = Probe::lrdd($addr);
$res = print_r($res, true);
}
$tpl = Renderer::getMarkupTemplate('webfinger.tpl');
return Renderer::replaceMacros($tpl, [
'$addr' => $addr,
'$res' => $res,
]);
}
}

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@ -0,0 +1,40 @@
<?php
namespace Friendica\Module\WellKnown;
use Friendica\BaseModule;
use Friendica\Core\Renderer;
use Friendica\Protocol\Salmon;
use Friendica\Util\Crypto;
/**
* Prints the metadata for describing this host
* @see https://tools.ietf.org/html/rfc6415
*/
class HostMeta extends BaseModule
{
public static function rawContent()
{
$app = self::getApp();
$config = $app->getConfig();
header('Content-type: text/xml');
if (!$config->get('system', 'site_pubkey', false)) {
$res = Crypto::newKeypair(1024);
$config->set('system', 'site_prvkey', $res['prvkey']);
$config->set('system', 'site_pubkey', $res['pubkey']);
}
$tpl = Renderer::getMarkupTemplate('xrd_host.tpl');
echo Renderer::replaceMacros($tpl, [
'$zhost' => $app->getHostName(),
'$zroot' => $app->getBaseURL(),
'$domain' => $app->getBaseURL(),
'$bigkey' => Salmon::salmonKey($config->get('system', 'site_pubkey'))
]);
exit();
}
}

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@ -0,0 +1,64 @@
<?php
namespace Friendica\Module\WellKnown;
use Friendica\BaseModule;
use Friendica\Model\Search;
/**
* Node subscription preferences for social realy systems
* @see https://git.feneas.org/jaywink/social-relay/blob/master/docs/relays.md
*/
class XSocialRelay extends BaseModule
{
public static function rawContent()
{
$app = self::getApp();
$config = $app->getConfig();
$subscribe = $config->get('system', 'relay_subscribe', false);
if ($subscribe) {
$scope = $config->get('system', 'relay_scope', SR_SCOPE_ALL);
} else {
$scope = SR_SCOPE_NONE;
}
$systemTags = [];
$userTags = [];
if ($scope == SR_SCOPE_TAGS) {
$server_tags = $config->get('system', 'relay_server_tags');
$tagitems = explode(',', $server_tags);
/// @todo Check if it was better to use "strtolower" on the tags
foreach ($tagitems AS $tag) {
$systemTags[] = trim($tag, '# ');
}
if ($config->get('system', 'relay_user_tags')) {
$userTags = Search::getUserTags();
}
}
$tagList = array_unique(array_merge($systemTags, $userTags));
$relay = [
'subscribe' => $subscribe,
'scope' => $scope,
'tags' => $tagList,
'protocols' => [
'diaspora' => [
'receive' => $app->getBaseURL() . '/receive/public'
],
'dfrn' => [
'receive' => $app->getBaseURL() . '/dfrn_notify'
]
]
];
header('Content-type: application/json; charset=utf-8');
echo json_encode($relay, JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES);
exit;
}
}

195
src/Module/Xrd.php Normal file
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@ -0,0 +1,195 @@
<?php
namespace Friendica\Module;
use Friendica\BaseModule;
use Friendica\Core\Hook;
use Friendica\Core\Renderer;
use Friendica\Core\System;
use Friendica\Model\User;
use Friendica\Protocol\Salmon;
use Friendica\Util\Strings;
/**
* Prints responses to /.well-known/webfinger or /xrd requests
*/
class Xrd extends BaseModule
{
public static function rawContent()
{
$app = self::getApp();
// @TODO: Replace with parameter from router
if ($app->argv[0] == 'xrd') {
if (empty($_GET['uri'])) {
return;
}
$uri = urldecode(Strings::escapeTags(trim($_GET['uri'])));
if (defaults($_SERVER, 'HTTP_ACCEPT', '') == 'application/jrd+json') {
$mode = 'json';
} else {
$mode = 'xml';
}
} else {
if (empty($_GET['resource'])) {
return;
}
$uri = urldecode(Strings::escapeTags(trim($_GET['resource'])));
if (defaults($_SERVER, 'HTTP_ACCEPT', '') == 'application/xrd+xml') {
$mode = 'xml';
} else {
$mode = 'json';
}
}
if (substr($uri, 0, 4) === 'http') {
$name = ltrim(basename($uri), '~');
} else {
$local = str_replace('acct:', '', $uri);
if (substr($local, 0, 2) == '//') {
$local = substr($local, 2);
}
$name = substr($local, 0, strpos($local, '@'));
}
$user = User::getByNickname($name);
if (empty($user)) {
System::httpExit(404);
}
$profileURL = $app->getBaseURL() . '/profile/' . $user['nickname'];
$alias = str_replace('/profile/', '/~', $profileURL);
$addr = 'acct:' . $user['nickname'] . '@' . $app->getHostName();
if ($app->getURLPath()) {
$addr .= '/' . $app->getURLPath();
}
if ($mode == 'xml') {
self::printXML($addr, $alias, $profileURL, $app->getBaseURL(), $user);
} else {
self::printJSON($addr, $alias, $profileURL, $app->getBaseURL(), $user);
}
}
private static function printJSON($uri, $alias, $orofileURL, $baseURL, $user)
{
$salmon_key = Salmon::salmonKey($user['spubkey']);
header('Access-Control-Allow-Origin: *');
header('Content-type: application/json; charset=utf-8');
$json = [
'subject' => $uri,
'aliases' => [
$alias,
$orofileURL,
],
'links' => [
[
'rel' => NAMESPACE_DFRN,
'href' => $orofileURL,
],
[
'rel' => NAMESPACE_FEED,
'type' => 'application/atom+xml',
'href' => $baseURL . '/dfrn_poll/' . $user['nickname'],
],
[
'rel' => 'http://webfinger.net/rel/profile-page',
'type' => 'text/html',
'href' => $orofileURL,
],
[
'rel' => 'self',
'type' => 'application/activity+json',
'href' => $orofileURL,
],
[
'rel' => 'http://microformats.org/profile/hcard',
'type' => 'text/html',
'href' => $baseURL . '/hcard/' . $user['nickname'],
],
[
'rel' => NAMESPACE_POCO,
'href' => $baseURL . '/poco/' . $user['nickname'],
],
[
'rel' => 'http://webfinger.net/rel/avatar',
'type' => 'image/jpeg',
'href' => $baseURL . '/photo/profile/' . $user['uid'] . '.jpg',
],
[
'rel' => 'http://joindiaspora.com/seed_location',
'type' => 'text/html',
'href' => $baseURL,
],
[
'rel' => 'salmon',
'href' => $baseURL . '/salmon/' . $user['nickname'],
],
[
'rel' => 'http://salmon-protocol.org/ns/salmon-replies',
'href' => $baseURL . '/salmon/' . $user['nickname'],
],
[
'rel' => 'http://salmon-protocol.org/ns/salmon-mention',
'href' => $baseURL . '/salmon/' . $user['nickname'] . '/mention',
],
[
'rel' => 'http://ostatus.org/schema/1.0/subscribe',
'template' => $baseURL . '/follow?url={uri}',
],
[
'rel' => 'magic-public-key',
'href' => 'data:application/magic-public-key,' . $salmon_key,
],
[
'rel' => 'http://purl.org/openwebauth/v1',
'type' => 'application/x-zot+json',
'href' => $baseURL . '/owa',
],
],
];
echo json_encode($json);
exit();
}
private static function printXML($uri, $alias, $profileURL, $baseURL, $user)
{
$salmon_key = Salmon::salmonKey($user['spubkey']);
header('Access-Control-Allow-Origin: *');
header('Content-type: text/xml');
$tpl = Renderer::getMarkupTemplate('xrd_person.tpl');
$o = Renderer::replaceMacros($tpl, [
'$nick' => $user['nickname'],
'$accturi' => $uri,
'$alias' => $alias,
'$profile_url' => $profileURL,
'$hcard_url' => $baseURL . '/hcard/' . $user['nickname'],
'$atom' => $baseURL . '/dfrn_poll/' . $user['nickname'],
'$poco_url' => $baseURL . '/poco/' . $user['nickname'],
'$photo' => $baseURL . '/photo/profile/' . $user['uid'] . '.jpg',
'$baseurl' => $baseURL,
'$salmon' => $baseURL . '/salmon/' . $user['nickname'],
'$salmen' => $baseURL . '/salmon/' . $user['nickname'] . '/mention',
'$subscribe' => $baseURL . '/follow?url={uri}',
'$openwebauth' => $baseURL . '/owa',
'$modexp' => 'data:application/magic-public-key,' . $salmon_key
]);
$arr = ['user' => $user, 'xml' => $o];
Hook::callAll('personal_xrd', $arr);
echo $arr['xml'];
exit();
}
}

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@ -0,0 +1,16 @@
<div class="generic-page-wrapper">
<h3>Webfinger Diagnostic</h3>
<form action="webfinger" method="get">
Lookup address: <input type="text" style="width: 250px;" name="addr" value="{{$addr}}" />
<input type="submit" name="submit" value="Submit" />
</form>
<br /><br />
{{if $res}}
<pre>
{{$res}}
</pre>
{{/if}}
</div>