forked from GNUsocial/gnu-social
19409cb999
NoticeSearchAction: - Add new event before finding query matches ActivityPubPlugin: - Subscribe new searchNotice event - Bump minor version number Activitypub_explorer: - Update lookup to make remote-grabbing optional
487 lines
18 KiB
PHP
487 lines
18 KiB
PHP
<?php
|
|
// This file is part of GNU social - https://www.gnu.org/software/social
|
|
//
|
|
// GNU social is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU Affero General Public License as published by
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
//
|
|
// GNU social is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU Affero General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU Affero General Public License
|
|
// along with GNU social. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
/**
|
|
* ActivityPub implementation for GNU social
|
|
*
|
|
* @package GNUsocial
|
|
* @author Diogo Cordeiro <diogo@fc.up.pt>
|
|
* @copyright 2018-2019 Free Software Foundation, Inc http://www.fsf.org
|
|
* @license https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
|
|
* @link http://www.gnu.org/software/social/
|
|
*/
|
|
|
|
defined('GNUSOCIAL') || die();
|
|
|
|
/**
|
|
* ActivityPub's own Explorer
|
|
*
|
|
* Allows to discovery new (or the same) Profiles (both local or remote)
|
|
*
|
|
* @category Plugin
|
|
* @package GNUsocial
|
|
* @author Diogo Cordeiro <diogo@fc.up.pt>
|
|
* @license https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
|
|
*/
|
|
class Activitypub_explorer
|
|
{
|
|
private $discovered_actor_profiles = [];
|
|
|
|
/**
|
|
* Shortcut function to get a single profile from its URL.
|
|
*
|
|
* @author Diogo Cordeiro <diogo@fc.up.pt>
|
|
* @param string $url
|
|
* @return Profile
|
|
* @throws Exception
|
|
*/
|
|
public static function get_profile_from_url($url)
|
|
{
|
|
$discovery = new Activitypub_explorer;
|
|
// Get valid Actor object
|
|
$actor_profile = $discovery->lookup($url);
|
|
if (!empty($actor_profile)) {
|
|
return $actor_profile[0];
|
|
}
|
|
throw new Exception('Invalid Actor.');
|
|
}
|
|
|
|
/**
|
|
* Get every profile from the given URL
|
|
* This function cleans the $this->discovered_actor_profiles array
|
|
* so that there is no erroneous data
|
|
*
|
|
* @param string $url User's url
|
|
* @param bool $remote remote lookup?
|
|
* @return array of Profile objects
|
|
* @throws HTTP_Request2_Exception
|
|
* @throws NoProfileException
|
|
* @throws ServerException
|
|
* @author Diogo Cordeiro <diogo@fc.up.pt>
|
|
*/
|
|
public function lookup(string $url, bool $remote = true)
|
|
{
|
|
if (in_array($url, ACTIVITYPUB_PUBLIC_TO)) {
|
|
return [];
|
|
}
|
|
|
|
common_debug('ActivityPub Explorer: Started now looking for '.$url);
|
|
$this->discovered_actor_profiles = [];
|
|
|
|
return $this->_lookup($url, $remote);
|
|
}
|
|
|
|
/**
|
|
* Get every profile from the given URL
|
|
* This is a recursive function that will accumulate the results on
|
|
* $discovered_actor_profiles array
|
|
*
|
|
* @param string $url User's url
|
|
* @param bool $remote remote lookup?
|
|
* @return array of Profile objects
|
|
* @throws HTTP_Request2_Exception
|
|
* @throws NoProfileException
|
|
* @throws ServerException
|
|
* @throws Exception
|
|
* @author Diogo Cordeiro <diogo@fc.up.pt>
|
|
*/
|
|
private function _lookup(string $url, bool $remote)
|
|
{
|
|
$grab_local = $this->grab_local_user($url);
|
|
|
|
// First check if we already have it locally and, if so, return it.
|
|
// If the local fetch fails and remote grab is required: store locally and return.
|
|
if (!$grab_local && (!$remote || !$this->grab_remote_user($url))) {
|
|
throw new Exception('User not found.');
|
|
}
|
|
|
|
return $this->discovered_actor_profiles;
|
|
}
|
|
|
|
/**
|
|
* This ensures that we are using a valid ActivityPub URI
|
|
*
|
|
* @author Diogo Cordeiro <diogo@fc.up.pt>
|
|
* @param string $url
|
|
* @return boolean success state (related to the response)
|
|
* @throws Exception (If the HTTP request fails)
|
|
*/
|
|
private function ensure_proper_remote_uri($url)
|
|
{
|
|
$client = new HTTPClient();
|
|
$headers = [];
|
|
$headers[] = 'Accept: application/ld+json; profile="https://www.w3.org/ns/activitystreams"';
|
|
$headers[] = 'User-Agent: GNUSocialBot v0.1 - https://gnu.io/social';
|
|
$response = $client->get($url, $headers);
|
|
$res = json_decode($response->getBody(), true);
|
|
if (self::validate_remote_response($res)) {
|
|
$this->temp_res = $res;
|
|
return true;
|
|
} else {
|
|
common_debug('ActivityPub Explorer: Invalid potential remote actor while ensuring URI: '.$url. '. He returned the following: '.json_encode($res, JSON_UNESCAPED_SLASHES));
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Get a local user profile from its URL and joins it on
|
|
* $this->discovered_actor_profiles
|
|
*
|
|
* @param string $uri Actor's uri
|
|
* @param bool $online
|
|
* @return boolean success state
|
|
* @throws NoProfileException
|
|
* @throws Exception
|
|
* @author Diogo Cordeiro <diogo@fc.up.pt>
|
|
*/
|
|
private function grab_local_user($uri, $online = false)
|
|
{
|
|
if ($online) {
|
|
common_debug('ActivityPub Explorer: Searching locally for '.$uri. ' with online resources.');
|
|
} else {
|
|
common_debug('ActivityPub Explorer: Searching locally for '.$uri. ' offline.');
|
|
}
|
|
// Ensure proper remote URI
|
|
// If an exception occurs here it's better to just leave everything
|
|
// break than to continue processing
|
|
if ($online && $this->ensure_proper_remote_uri($uri)) {
|
|
$uri = $this->temp_res["id"];
|
|
}
|
|
|
|
// Try standard ActivityPub route
|
|
// Is this a known filthy little mudblood?
|
|
$aprofile = self::get_aprofile_by_url($uri);
|
|
if ($aprofile instanceof Activitypub_profile) {
|
|
$profile = $aprofile->local_profile();
|
|
common_debug('ActivityPub Explorer: Found a local Aprofile for '.$uri);
|
|
// We found something!
|
|
$this->discovered_actor_profiles[]= $profile;
|
|
unset($this->temp_res); // IMPORTANT to avoid _dangerous_ noise in the Explorer system
|
|
return true;
|
|
} else {
|
|
common_debug('ActivityPub Explorer: Unable to find a local Aprofile for '.$uri.' - looking for a Profile instead.');
|
|
// Well, maybe it is a pure blood?
|
|
// Iff, we are in the same instance:
|
|
$ACTIVITYPUB_BASE_ACTOR_URI_length = strlen(ACTIVITYPUB_BASE_ACTOR_URI);
|
|
if (substr($uri, 0, $ACTIVITYPUB_BASE_ACTOR_URI_length) == ACTIVITYPUB_BASE_ACTOR_URI) {
|
|
try {
|
|
$profile = Profile::getByID(intval(substr($uri, $ACTIVITYPUB_BASE_ACTOR_URI_length)));
|
|
common_debug('ActivityPub Explorer: Found a Profile for '.$uri);
|
|
// We found something!
|
|
$this->discovered_actor_profiles[]= $profile;
|
|
unset($this->temp_res); // IMPORTANT to avoid _dangerous_ noise in the Explorer system
|
|
return true;
|
|
} catch (Exception $e) {
|
|
// Let the exception go on its merry way.
|
|
common_debug('ActivityPub Explorer: Unable to find a Profile for '.$uri);
|
|
}
|
|
}
|
|
}
|
|
|
|
// If offline grabbing failed, attempt again with online resources
|
|
if (!$online) {
|
|
common_debug('ActivityPub Explorer: Will try everything again with online resources against: '.$uri);
|
|
return $this->grab_local_user($uri, true);
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Get a remote user(s) profile(s) from its URL and joins it on
|
|
* $this->discovered_actor_profiles
|
|
*
|
|
* @param string $url User's url
|
|
* @return boolean success state
|
|
* @throws HTTP_Request2_Exception
|
|
* @throws NoProfileException
|
|
* @throws ServerException
|
|
* @author Diogo Cordeiro <diogo@fc.up.pt>
|
|
*/
|
|
private function grab_remote_user($url)
|
|
{
|
|
common_debug('ActivityPub Explorer: Trying to grab a remote actor for '.$url);
|
|
if (!isset($this->temp_res)) {
|
|
$client = new HTTPClient();
|
|
$headers = [];
|
|
$headers[] = 'Accept: application/ld+json; profile="https://www.w3.org/ns/activitystreams"';
|
|
$headers[] = 'User-Agent: GNUSocialBot v0.1 - https://gnu.io/social';
|
|
$response = $client->get($url, $headers);
|
|
$res = json_decode($response->getBody(), true);
|
|
} else {
|
|
$res = $this->temp_res;
|
|
unset($this->temp_res);
|
|
}
|
|
if (isset($res['type']) && $res['type'] === 'OrderedCollection' && isset($res['first'])) { // It's a potential collection of actors!!!
|
|
common_debug('ActivityPub Explorer: Found a collection of actors for '.$url);
|
|
$this->travel_collection($res['first']);
|
|
return true;
|
|
} elseif (self::validate_remote_response($res)) {
|
|
common_debug('ActivityPub Explorer: Found a valid remote actor for '.$url);
|
|
$this->discovered_actor_profiles[]= $this->store_profile($res);
|
|
return true;
|
|
} else {
|
|
common_debug('ActivityPub Explorer: Invalid potential remote actor while grabbing remotely: '.$url. '. He returned the following: '.json_encode($res, JSON_UNESCAPED_SLASHES));
|
|
}
|
|
|
|
// TODO: Fallback to OStatus
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Save remote user profile in local instance
|
|
*
|
|
* @param array $res remote response
|
|
* @return Profile remote Profile object
|
|
* @throws NoProfileException
|
|
* @throws ServerException
|
|
* @author Diogo Cordeiro <diogo@fc.up.pt>
|
|
*/
|
|
private function store_profile($res)
|
|
{
|
|
// ActivityPub Profile
|
|
$aprofile = new Activitypub_profile;
|
|
$aprofile->uri = $res['id'];
|
|
$aprofile->nickname = $res['preferredUsername'];
|
|
$aprofile->fullname = isset($res['name']) ? $res['name'] : null;
|
|
$aprofile->bio = isset($res['summary']) ? substr(strip_tags($res['summary']), 0, 1000) : null;
|
|
$aprofile->inboxuri = $res['inbox'];
|
|
$aprofile->sharedInboxuri = isset($res['endpoints']['sharedInbox']) ? $res['endpoints']['sharedInbox'] : $res['inbox'];
|
|
|
|
$aprofile->do_insert();
|
|
$profile = $aprofile->local_profile();
|
|
|
|
// Public Key
|
|
$apRSA = new Activitypub_rsa();
|
|
$apRSA->profile_id = $profile->getID();
|
|
$apRSA->public_key = $res['publicKey']['publicKeyPem'];
|
|
$apRSA->store_keys();
|
|
|
|
// Avatar
|
|
if (isset($res['icon']['url'])) {
|
|
try {
|
|
$this->update_avatar($profile, $res['icon']['url']);
|
|
} catch (Exception $e) {
|
|
// Let the exception go, it isn't a serious issue
|
|
common_debug('ActivityPub Explorer: An error ocurred while grabbing remote avatar: '.$e->getMessage());
|
|
}
|
|
}
|
|
|
|
return $profile;
|
|
}
|
|
|
|
/**
|
|
* Download and update given avatar image
|
|
*
|
|
* @author GNU social
|
|
* @param Profile $profile
|
|
* @param string $url
|
|
* @return Avatar The Avatar we have on disk.
|
|
* @throws Exception in various failure cases
|
|
*/
|
|
public static function update_avatar(Profile $profile, $url)
|
|
{
|
|
common_debug('ActivityPub Explorer: Started grabbing remote avatar from: '.$url);
|
|
if (!filter_var($url, FILTER_VALIDATE_URL)) {
|
|
// TRANS: Server exception. %s is a URL.
|
|
common_debug('ActivityPub Explorer: Failed because it is an invalid url: '.$url);
|
|
throw new ServerException(sprintf('Invalid avatar URL %s.', $url));
|
|
}
|
|
|
|
// @todo FIXME: This should be better encapsulated
|
|
// ripped from oauthstore.php (for old OMB client)
|
|
$temp_filename = tempnam(sys_get_temp_dir(), 'listener_avatar');
|
|
try {
|
|
$imgData = HTTPClient::quickGet($url);
|
|
// Make sure it's at least an image file. ImageFile can do the rest.
|
|
if (false === getimagesizefromstring($imgData)) {
|
|
common_debug('ActivityPub Explorer: Failed because the downloaded avatar: '.$url. 'is not a valid image.');
|
|
throw new UnsupportedMediaException('Downloaded avatar was not an image.');
|
|
}
|
|
file_put_contents($temp_filename, $imgData);
|
|
unset($imgData); // No need to carry this in memory.
|
|
common_debug('ActivityPub Explorer: Stored dowloaded avatar in: '.$temp_filename);
|
|
|
|
$id = $profile->getID();
|
|
|
|
$imagefile = new ImageFile(null, $temp_filename);
|
|
$filename = Avatar::filename(
|
|
$id,
|
|
image_type_to_extension($imagefile->type),
|
|
null,
|
|
common_timestamp()
|
|
);
|
|
rename($temp_filename, Avatar::path($filename));
|
|
common_debug('ActivityPub Explorer: Moved avatar from: '.$temp_filename.' to '.$filename);
|
|
} catch (Exception $e) {
|
|
common_debug('ActivityPub Explorer: Something went wrong while processing the avatar from: '.$url.' details: '.$e->getMessage());
|
|
unlink($temp_filename);
|
|
throw $e;
|
|
}
|
|
// @todo FIXME: Hardcoded chmod is lame, but seems to be necessary to
|
|
// keep from accidentally saving images from command-line (queues)
|
|
// that can't be read from web server, which causes hard-to-notice
|
|
// problems later on:
|
|
//
|
|
// http://status.net/open-source/issues/2663
|
|
chmod(Avatar::path($filename), 0644);
|
|
|
|
$profile->setOriginal($filename);
|
|
|
|
$orig = clone($profile);
|
|
$profile->avatar = $url;
|
|
$profile->update($orig);
|
|
|
|
common_debug('ActivityPub Explorer: Seted Avatar from: '.$url.' to profile.');
|
|
return Avatar::getUploaded($profile);
|
|
}
|
|
|
|
/**
|
|
* Validates a remote response in order to determine whether this
|
|
* response is a valid profile or not
|
|
*
|
|
* @author Diogo Cordeiro <diogo@fc.up.pt>
|
|
* @param array $res remote response
|
|
* @return boolean success state
|
|
*/
|
|
public static function validate_remote_response($res)
|
|
{
|
|
if (!isset($res['id'], $res['preferredUsername'], $res['inbox'], $res['publicKey']['publicKeyPem'])) {
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Get a ActivityPub Profile from it's uri
|
|
* Unfortunately GNU social cache is not truly reliable when handling
|
|
* potential ActivityPub remote profiles, as so it is important to use
|
|
* this hacky workaround (at least for now)
|
|
*
|
|
* @author Diogo Cordeiro <diogo@fc.up.pt>
|
|
* @param string $v URL
|
|
* @return boolean|Activitypub_profile false if fails | Aprofile object if successful
|
|
*/
|
|
public static function get_aprofile_by_url($v)
|
|
{
|
|
$i = Managed_DataObject::getcached("Activitypub_profile", "uri", $v);
|
|
if (empty($i)) { // false = cache miss
|
|
$i = new Activitypub_profile;
|
|
$result = $i->get("uri", $v);
|
|
if ($result) {
|
|
// Hit!
|
|
$i->encache();
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
return $i;
|
|
}
|
|
|
|
/**
|
|
* Given a valid actor profile url returns its inboxes
|
|
*
|
|
* @param string $url of Actor profile
|
|
* @return boolean|array false if fails | array with inbox and shared inbox if successful
|
|
* @throws HTTP_Request2_Exception
|
|
* @throws Exception
|
|
* @author Diogo Cordeiro <diogo@fc.up.pt>
|
|
*/
|
|
public static function get_actor_inboxes_uri($url)
|
|
{
|
|
$client = new HTTPClient();
|
|
$headers = [];
|
|
$headers[] = 'Accept: application/ld+json; profile="https://www.w3.org/ns/activitystreams"';
|
|
$headers[] = 'User-Agent: GNUSocialBot ' . GNUSOCIAL_VERSION . ' - https://gnu.io/social';
|
|
$response = $client->get($url, $headers);
|
|
if (!$response->isOk()) {
|
|
throw new Exception('Invalid Actor URL.');
|
|
}
|
|
$res = json_decode($response->getBody(), true);
|
|
if (self::validate_remote_response($res)) {
|
|
return [
|
|
'inbox' => $res['inbox'],
|
|
'sharedInbox' => isset($res['endpoints']['sharedInbox']) ? $res['endpoints']['sharedInbox'] : $res['inbox']
|
|
];
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Allows the Explorer to transverse a collection of persons.
|
|
*
|
|
* @param string $url
|
|
* @return boolean
|
|
* @throws HTTP_Request2_Exception
|
|
* @throws NoProfileException
|
|
* @throws ServerException
|
|
* @author Diogo Cordeiro <diogo@fc.up.pt>
|
|
*/
|
|
private function travel_collection($url)
|
|
{
|
|
$client = new HTTPClient();
|
|
$headers = [];
|
|
$headers[] = 'Accept: application/ld+json; profile="https://www.w3.org/ns/activitystreams"';
|
|
$headers[] = 'User-Agent: GNUSocialBot v0.1 - https://gnu.io/social';
|
|
$response = $client->get($url, $headers);
|
|
$res = json_decode($response->getBody(), true);
|
|
|
|
if (!isset($res['orderedItems'])) {
|
|
return false;
|
|
}
|
|
|
|
foreach ($res["orderedItems"] as $profile) {
|
|
if ($this->_lookup($profile) == false) {
|
|
common_debug('ActivityPub Explorer: Found an invalid actor for '.$profile);
|
|
// TODO: Invalid actor found, fallback to OStatus
|
|
}
|
|
}
|
|
// Go through entire collection
|
|
if (!is_null($res["next"])) {
|
|
$this->_lookup($res["next"]);
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Get a remote user array from its URL (this function is only used for
|
|
* profile updating and shall not be used for anything else)
|
|
*
|
|
* @param string $url User's url
|
|
* @return mixed
|
|
* @throws Exception
|
|
* @author Diogo Cordeiro <diogo@fc.up.pt>
|
|
*/
|
|
public static function get_remote_user_activity($url)
|
|
{
|
|
$client = new HTTPClient();
|
|
$headers = [];
|
|
$headers[] = 'Accept: application/ld+json; profile="https://www.w3.org/ns/activitystreams"';
|
|
$headers[] = 'User-Agent: GNUSocialBot v0.1 - https://gnu.io/social';
|
|
$response = $client->get($url, $headers);
|
|
$res = json_decode($response->getBody(), true);
|
|
if (Activitypub_explorer::validate_remote_response($res)) {
|
|
common_debug('ActivityPub Explorer: Found a valid remote actor for '.$url);
|
|
return $res;
|
|
}
|
|
throw new Exception('ActivityPub Explorer: Failed to get activity.');
|
|
}
|
|
}
|