get($source); } catch(Exception $ex) { return NULL; } $body = htmlspecialchars_decode($response->getBody()); // We're slightly more lenient in our link detection than the spec requires if(!linkback_lenient_target_match($body, $target)) { return NULL; } return $response; } function linkback_get_target($target) { // Resolve target (https://github.com/converspace/webmention/issues/43) $request = HTTPClient::start(); try { $response = $request->head($target); } catch(Exception $ex) { return NULL; } try { $notice = Notice::fromUri($response->getEffectiveUrl()); } catch(UnknownUriException $ex) { preg_match('/\/notice\/(\d+)(?:#.*)?$/', $response->getEffectiveUrl(), $match); $notice = Notice::getKV('id', $match[1]); } if($notice instanceof Notice && $notice->isLocal()) { return $notice; } else { $user = User::getKV('uri', $response->getEffectiveUrl()); if(!$user) { preg_match('/\/user\/(\d+)(?:#.*)?$/', $response->getEffectiveUrl(), $match); $user = User::getKV('id', $match[1]); } if(!$user) { preg_match('/\/([^\/\?#]+)(?:#.*)?$/', $response->getEffectiveUrl(), $match); if(linkback_lenient_target_match(common_profile_url($match[1]), $response->getEffectiveUrl())) { $user = User::getKV('nickname', $match[1]); } } if($user instanceof User) { return $user; } } return NULL; } function linkback_is_contained_in($entry, $target) { foreach ((array)$entry['properties'] as $key => $values) { if(count(array_filter($values, function($x) use ($target) { return linkback_lenient_target_match($x, $target); })) > 0) { return $entry['properties']; } // check included h-* formats and their links foreach ($values as $obj) { if(isset($obj['type']) && array_intersect(array('h-cite', 'h-entry'), $obj['type']) && isset($obj['properties']) && isset($obj['properties']['url']) && count(array_filter($obj['properties']['url'], function($x) use ($target) { return linkback_lenient_target_match($x, $target); })) > 0 ) { return $entry['properties']; } } // check content for the link if ($key == "content" && preg_match_all("/]+?".preg_quote($target, "/")."[^>]*>([^>]+?)<\/a>/i", htmlspecialchars_decode($values[0]['html']), $context)) { return $entry['properties']; // check summary for the link } elseif ($key == "summary" && preg_match_all("/]+?".preg_quote($target, "/")."[^>]*>([^>]+?)<\/a>/i", htmlspecialchars_decode($values[0]), $context)) { return $entry['properties']; } } foreach((array)$entry['children'] as $mf2) { if(linkback_is_contained_in($mf2, $target)) { return $entry['properties']; } } return null; } // Based on https://github.com/acegiak/Semantic-Linkbacks/blob/master/semantic-linkbacks-microformats-handler.php, GPL-2.0+ function linkback_find_entry($mf2, $target) { if(isset($mf2['items'][0]['type']) && in_array("h-feed", $mf2['items'][0]["type"]) && isset($mf2['items'][0]['children'])) { $mf2['items'] = $mf2['items'][0]['children']; } $entries = array_filter($mf2['items'], function($x) { return isset($x['type']) && in_array('h-entry', $x['type']); }); foreach ($entries as $entry) { if($prop = linkback_is_contained_in($entry, $target)) { return $prop; } } // Default to first one if(count($entries) > 0) { return $entries[0]['properties']; } return NULL; } function linkback_entry_type($entry, $mf2, $target) { if(!$entry) { return 'mention'; } if($mf2['rels'] && $mf2['rels']['in-reply-to']) { foreach($mf2['rels']['in-reply-to'] as $url) { if(linkback_lenient_target_match($url, $target)) { return 'reply'; } } } $classes = array( 'in-reply-to' => 'reply', 'repost-of' => 'repost', 'like-of' => 'like', 'tag-of' => 'tag' ); foreach((array)$entry as $key => $values) { if(count(array_filter($values, function($x) use ($target) { return linkback_lenient_target_match($x, $target); })) > 0) { if($classes[$key]) { return $classes[$key]; } } foreach ($values as $obj) { if(isset($obj['type']) && array_intersect(array('h-cite', 'h-entry'), $obj['type']) && isset($obj['properties']) && isset($obj['properties']['url']) && count(array_filter($obj['properties']['url'], function($x) use ($target) { return linkback_lenient_target_match($x, $target); })) > 0 ) { if($classes[$key]) { return $classes[$key]; } } } } return 'mention'; } function linkback_is_dupe($key, $url) { $dupe = Notice::getKV($key, $url); if ($dupe instanceof Notice) { return $dupe; } return false; } function linkback_hcard($mf2, $url) { if(empty($mf2['items'])) { return null; } $hcards = array(); foreach($mf2['items'] as $item) { if(!in_array('h-card', $item['type'])) { continue; } // We found a match, return it immediately if(isset($item['properties']['url']) && in_array($url, $item['properties']['url'])) { return $item['properties']; } // Let's keep all the hcards for later, to return one of them at least $hcards[] = $item['properties']; } // No match immediately for the url we expected, but there were h-cards found if (count($hcards) > 0) { return $hcards[0]; } return null; } function linkback_notice($source, $notice_or_user, $entry, $author, $mf2) { $content = $entry['content'] ? $entry['content'][0]['html'] : ($entry['summary'] ? $entry['sumary'][0] : $entry['name'][0]); $rendered = common_purify($content); if($notice_or_user instanceof Notice && $entry['type'] == 'mention') { $name = $entry['name'] ? $entry['name'][0] : substr(common_strip_html($content), 0, 20).'…'; $rendered = _m('linked to this from '.htmlspecialchars($name).''); } $content = common_strip_html($rendered); $shortened = common_shorten_links($content); if(Notice::contentTooLong($shortened)) { $content = substr($content, 0, Notice::maxContent() - (mb_strlen($source) + 2)); $rendered = $content . ''; $content .= ' ' . $source; } $options = array('is_local' => Notice::REMOTE, 'url' => $entry['url'][0], 'uri' => $entry['url'][0], 'rendered' => $rendered, 'replies' => array(), 'groups' => array(), 'peopletags' => array(), 'tags' => array(), 'urls' => array()); if($notice_or_user instanceof User) { $options['replies'][] = $notice_or_user->getUri(); } else { if($entry['type'] == 'repost') { $options['repeat_of'] = $notice_or_user->id; } else { $options['reply_to'] = $notice_or_user->id; } } if($entry['published'] || $entry['updated']) { $options['created'] = $entry['published'] ? common_sql_date($entry['published'][0]) : common_sql_date($entry['updated'][0]); } if($entry['photo']) { $options['urls'][] = $entry['photo'][0]; } foreach((array)$entry['category'] as $tag) { $tag = common_canonical_tag($tag); if($tag) { $options['tags'][] = $tag; } } if($mf2['rels'] && $mf2['rels']['enclosure']) { foreach($mf2['rels']['enclosure'] as $url) { $options['urls'][] = $url; } } if($mf2['rels'] && $mf2['rels']['tag']) { foreach($mf2['rels']['tag'] as $url) { preg_match('/\/([^\/]+)\/*$/', $url, $match); $tag = common_canonical_tag($match[1]); if($tag) { $options['tags'][] = $tag; } } } if($entry['type'] != 'reply' && $entry['type'] != 'repost') { $options['urls'] = array(); } return array($content, $options); } function linkback_profile($entry, $mf2, $response, $target) { if(isset($entry['properties']['author']) && isset($entry['properties']['author'][0]['properties'])) { $author = $entry['properties']['author'][0]['properties']; } else { $author = linkback_hcard($mf2, $response->getEffectiveUrl()); } if(!$author) { $author = array('name' => array($entry['name'])); } if(!$author['url']) { $author['url'] = array($response->getEffectiveUrl()); } $user = User::getKV('uri', $author['url'][0]); if ($user instanceof User) { common_log(LOG_INFO, "Linkback: ignoring linkback from local user: $url"); return true; } try { $profile = Profile::fromUri($author['url'][0]); } catch(UnknownUriException $ex) {} if(!($profile instanceof Profile)) { $profile = Profile::getKV('profileurl', $author['url'][0]); } if(!($profile instanceof Profile)) { $profile = new Profile(); $profile->profileurl = $author['url'][0]; $profile->fullname = $author['name'][0]; $profile->nickname = $author['nickname'] ? $author['nickname'][0] : str_replace(' ', '', $author['name'][0]); $profile->created = common_sql_now(); $profile->insert(); } return array($profile, $author); } function linkback_save($source, $target, $response, $notice_or_user) { $dupe = linkback_is_dupe('uri', $response->getEffectiveUrl()); if(!$dupe) { $dupe = linkback_is_dupe('url', $response->getEffectiveUrl()); } if(!$dupe) { $dupe = linkback_is_dupe('uri', $source); } if(!$dupe) { $dupe = linkback_is_dupe('url', $source); } $mf2 = new Mf2\Parser($response->getBody(), $response->getEffectiveUrl()); $mf2 = $mf2->parse(); $entry = linkback_find_entry($mf2, $target); if(!$entry) { preg_match('/([^<]+)', $response->getBody(), $match); $entry = array( 'content' => array('html' => $response->getBody()), 'name' => $match[1] ? htmlspecialchars_decode($match[1]) : $source ); } if(!$entry['url']) { $entry['url'] = array($response->getEffectiveUrl()); } if(!$dupe) { $dupe = linkback_is_dupe('uri', $entry['url'][0]); } if(!$dupe) { $dupe = linkback_is_dupe('url', $entry['url'][0]); } $entry['type'] = linkback_entry_type($entry, $mf2, $target); list($profile, $author) = linkback_profile($entry, $mf2, $response, $target); list($content, $options) = linkback_notice($source, $notice_or_user, $entry, $author, $mf2); if($dupe) { $orig = clone($dupe); try { // Ignore duplicate save error try { $dupe->saveKnownReplies($options['replies']); } catch (ServerException $ex) {} try { $dupe->saveKnownTags($options['tags']); } catch (ServerException $ex) {} try { $dupe->saveKnownUrls($options['urls']); } catch (ServerException $ex) {} if($options['reply_to']) { $dupe->reply_to = $options['reply_to']; } if($options['repost_of']) { $dupe->repost_of = $options['repost_of']; } if($dupe->update($orig)) { $saved = $dupe; } } catch (Exception $e) { common_log(LOG_ERR, "Linkback update of remote message $source failed: " . $e->getMessage()); return false; } common_log(LOG_INFO, "Linkback updated remote message $source as notice id $saved->id"); } else if($entry['type'] == 'like' || ($entry['type'] == 'reply' && $entry['rsvp'])) { $act = new Activity(); $act->type = ActivityObject::ACTIVITY; $act->time = $options['created'] ? strtotime($options['created']) : time(); $act->title = $entry["name"] ? $entry["name"][0] : _m("Favor"); $act->actor = $profile->asActivityObject(); $act->target = $notice_or_user->asActivityObject(); $act->objects = array(clone($act->target)); // TRANS: Message that is the "content" of a favorite (%1$s is the actor's nickname, %2$ is the favorited // notice's nickname and %3$s is the content of the favorited notice.) $act->content = sprintf(_('%1$s favorited something by %2$s: %3$s'), $profile->getNickname(), $notice_or_user->getProfile()->getNickname(), $notice_or_user->rendered ?: $notice_or_user->content); if($entry['rsvp']) { $act->content = $options['rendered']; } $act->verb = ActivityVerb::FAVORITE; if(strtolower($entry['rsvp'][0]) == 'yes') { $act->verb = 'http://activitystrea.ms/schema/1.0/rsvp-yes'; } else if(strtolower($entry['rsvp'][0]) == 'no') { $act->verb = 'http://activitystrea.ms/schema/1.0/rsvp-no'; } else if(strtolower($entry['rsvp'][0]) == 'maybe') { $act->verb = 'http://activitystrea.ms/schema/1.0/rsvp-maybe'; } $act->id = $source; $act->link = $entry['url'][0]; $options['source'] = 'linkback'; $options['mentions'] = $options['replies']; unset($options['reply_to']); unset($options['repeat_of']); try { $saved = Notice::saveActivity($act, $profile, $options); } catch (Exception $e) { common_log(LOG_ERR, "Linkback save of remote message $source failed: " . $e->getMessage()); return false; } common_log(LOG_INFO, "Linkback saved remote message $source as notice id $saved->id"); } else { // Fallback is to make a notice manually try { $saved = Notice::saveNew($profile->id, $content, 'linkback', $options); } catch (Exception $e) { common_log(LOG_ERR, "Linkback save of remote message $source failed: " . $e->getMessage()); return false; } common_log(LOG_INFO, "Linkback saved remote message $source as notice id $saved->id"); } return $saved->getLocalUrl(); }