581 lines
19 KiB
PHP
581 lines
19 KiB
PHP
<?php
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// This file is part of GNU social - https://www.gnu.org/software/social
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//
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// GNU social is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// GNU social is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with GNU social. If not, see <http://www.gnu.org/licenses/>.
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defined('GNUSOCIAL') || die();
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function linkback_lenient_target_match($body, $target)
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{
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return strpos('' . $body, str_replace(
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['http://www.', 'http://', 'https://www.', 'https://'],
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'',
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preg_replace('/\/+$/', '', preg_replace('/#.*/', '', $target))
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));
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}
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function linkback_get_source($source, $target)
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{
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// Check if we are pinging ourselves and ignore
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$localprefix = common_config('site', 'server') . '/' . common_config('site', 'path');
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if (linkback_lenient_target_match($source, $localprefix) === 0) {
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common_debug('Ignoring self ping from ' . $source . ' to ' . $target);
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return null;
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}
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$request = HTTPClient::start();
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try {
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$response = $request->get($source);
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} catch (Exception $ex) {
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return null;
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}
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$body = htmlspecialchars_decode($response->getBody());
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// We're slightly more lenient in our link detection than the spec requires
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if (linkback_lenient_target_match($body, $target) === false) {
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return null;
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}
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return $response;
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}
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function linkback_get_target($target)
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{
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// Resolve target (https://github.com/converspace/webmention/issues/43)
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$request = HTTPClient::start();
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try {
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$response = $request->head($target);
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} catch (Exception $ex) {
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return null;
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}
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try {
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$notice = Notice::fromUri($response->getEffectiveUrl());
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} catch (UnknownUriException $ex) {
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preg_match('/\/notice\/(\d+)(?:#.*)?$/', $response->getEffectiveUrl(), $match);
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$notice = Notice::getKV('id', $match[1]);
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}
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if ($notice instanceof Notice && $notice->isLocal()) {
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return $notice;
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} else {
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$user = User::getKV('uri', $response->getEffectiveUrl());
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if (!$user) {
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preg_match('/\/user\/(\d+)(?:#.*)?$/', $response->getEffectiveUrl(), $match);
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$user = User::getKV('id', $match[1]);
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}
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if (!$user) {
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preg_match('/\/([^\/\?#]+)(?:#.*)?$/', $response->getEffectiveUrl(), $match);
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if (linkback_lenient_target_match(
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common_profile_url($match[1]),
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$response->getEffectiveUrl()
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) !== false) {
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$user = User::getKV('nickname', $match[1]);
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}
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}
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if ($user instanceof User) {
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return $user;
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}
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}
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return null;
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}
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function linkback_is_contained_in($entry, $target)
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{
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foreach ((array)$entry['properties'] as $key => $values) {
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if (count(array_filter($values, function ($x) use ($target) {
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return linkback_lenient_target_match($x, $target) !== false;
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})) > 0) {
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return $entry['properties'];
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}
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// check included h-* formats and their links
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foreach ($values as $obj) {
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if (
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array_key_exists('type', $obj)
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&& array_intersect(['h-cite', 'h-entry'], $obj['type'])
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&& array_key_exists('properties', $obj)
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&& array_key_exists('url', $obj['properties'])
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&& count(array_filter(
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$obj['properties']['url'],
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function ($x) use ($target) {
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return linkback_lenient_target_match($x, $target) !== false;
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}
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)) > 0
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) {
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return $entry['properties'];
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}
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}
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// check content for the link
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if ($key == "content" && preg_match_all("/<a[^>]+?".preg_quote($target, "/")."[^>]*>([^>]+?)<\/a>/i", htmlspecialchars_decode($values[0]['html']), $context)) {
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return $entry['properties'];
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// check summary for the link
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} elseif ($key == "summary" && preg_match_all("/<a[^>]+?".preg_quote($target, "/")."[^>]*>([^>]+?)<\/a>/i", htmlspecialchars_decode($values[0]), $context)) {
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return $entry['properties'];
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}
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}
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foreach ((array) $entry['children'] as $mf2) {
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if (linkback_is_contained_in($mf2, $target)) {
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return $entry['properties'];
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}
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}
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return null;
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}
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// Based on https://github.com/acegiak/Semantic-Linkbacks/blob/master/semantic-linkbacks-microformats-handler.php, GPL-2.0+
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function linkback_find_entry($mf2, $target)
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{
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if (
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array_key_exists('type', $mf2['items'][0])
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&& in_array('h-feed', $mf2['items'][0]['type'])
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&& array_key_exists('children', $mf2['items'][0])
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) {
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$mf2['items'] = $mf2['items'][0]['children'];
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}
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$entries = array_filter($mf2['items'], function ($x) {
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return array_key_exists('type', $x) && in_array('h-entry', $x['type']);
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});
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foreach ($entries as $entry) {
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if (($prop = linkback_is_contained_in($entry, $target))) {
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return $prop;
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}
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}
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// Default to first one
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if (count($entries) > 0) {
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return $entries[0]['properties'];
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}
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return null;
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}
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function linkback_entry_type($entry, $mf2, $target)
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{
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if (!$entry) {
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return 'mention';
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}
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if ($mf2['rels'] && $mf2['rels']['in-reply-to']) {
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foreach ($mf2['rels']['in-reply-to'] as $url) {
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if (linkback_lenient_target_match($url, $target) !== false) {
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return 'reply';
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}
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}
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}
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$classes = array(
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'in-reply-to' => 'reply',
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'repost-of' => 'repost',
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'like-of' => 'like',
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'tag-of' => 'tag'
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);
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foreach ((array) $entry as $key => $values) {
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if (count(array_filter($values, function ($x) use ($target) {
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return linkback_lenient_target_match($x, $target) !== false;
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})) > 0) {
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if ($classes[$key]) {
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return $classes[$key];
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}
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}
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foreach ($values as $obj) {
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if (
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array_key_exists('type', $obj)
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&& array_intersect(['h-cite', 'h-entry'], $obj['type'])
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&& array_key_exists('properties', $obj)
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&& array_key_exists('url', $obj['properties'])
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&& count(array_filter(
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$obj['properties']['url'],
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function ($x) use ($target) {
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return linkback_lenient_target_match($x, $target) !== false;
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}
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)) > 0
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) {
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if ($classes[$key]) {
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return $classes[$key];
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}
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}
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}
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}
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return 'mention';
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}
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function linkback_is_dupe($key, $url)
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{
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$dupe = Notice::getKV($key, $url);
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if ($dupe instanceof Notice) {
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return $dupe;
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}
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return false;
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}
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function linkback_hcard($mf2, $url)
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{
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if (empty($mf2['items'])) {
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return null;
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}
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$hcards = array();
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foreach ($mf2['items'] as $item) {
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if (!in_array('h-card', $item['type'])) {
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continue;
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}
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// We found a match, return it immediately
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if (
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array_key_exists('url', $item['properties'])
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&& in_array($url, $item['properties']['url'])
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) {
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return $item['properties'];
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}
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// Let's keep all the hcards for later, to return one of them at least
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$hcards[] = $item['properties'];
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}
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// No match immediately for the url we expected, but there were h-cards found
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if (count($hcards) > 0) {
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return $hcards[0];
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}
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return null;
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}
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function linkback_notice($source, $notice_or_user, $entry, $author, $mf2)
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{
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$content = isset($entry['content']) ? $entry['content'][0]['html'] :
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(isset($entry['summary']) ? $entry['summary'][0] : $entry['name'][0]);
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$rendered = common_purify($content);
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if ($notice_or_user instanceof Notice && $entry['type'] === 'mention') {
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$name = isset($entry['name']) ? $entry['name'][0] : substr(common_strip_html($content), 0, 20).'…';
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$rendered = _m('linked to this from <a href="'.htmlspecialchars($source).'">'.htmlspecialchars($name).'</a>');
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}
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$content = common_strip_html($rendered);
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$shortened = common_shorten_links($content);
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if (Notice::contentTooLong($shortened)) {
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$content = substr(
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$content,
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0,
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(Notice::maxContent() - (mb_strlen($source) + 2))
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);
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$rendered = $content . '<a href="'.htmlspecialchars($source).'">…</a>';
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$content .= ' ' . $source;
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}
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$options = array('is_local' => Notice::REMOTE,
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'url' => $entry['url'][0],
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'uri' => $entry['url'][0],
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'rendered' => $rendered,
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'replies' => array(),
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'groups' => array(),
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'peopletags' => array(),
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'tags' => array(),
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'urls' => array());
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if ($notice_or_user instanceof User) {
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$options['replies'][] = $notice_or_user->getUri();
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} else {
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if ($entry['type'] === 'repost') {
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$options['repeat_of'] = $notice_or_user->id;
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} else {
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$options['reply_to'] = $notice_or_user->id;
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}
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}
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if (isset($entry['published']) || isset($entry['updated'])) {
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$options['created'] = isset($entry['published'])
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? common_sql_date(strtotime($entry['published'][0]))
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: common_sql_date(strtotime($entry['updated'][0]));
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}
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if (isset($entry['photo']) && common_valid_http_url($entry['photo'])) {
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$options['urls'][] = $entry['photo'][0];
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} elseif (isset($entry['photo'])) {
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common_debug('Linkback got invalid HTTP URL for photo: '._ve($entry['photo']));
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}
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foreach ((array) $entry['category'] as $tag) {
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$tag = common_canonical_tag($tag);
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if ($tag) {
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$options['tags'][] = $tag;
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}
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}
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if ($mf2['rels'] && $mf2['rels']['enclosure']) {
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foreach ($mf2['rels']['enclosure'] as $url) {
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$options['urls'][] = $url;
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}
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}
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if ($mf2['rels'] && $mf2['rels']['tag']) {
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foreach ($mf2['rels']['tag'] as $url) {
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preg_match('/\/([^\/]+)\/*$/', $url, $match);
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$tag = common_canonical_tag($match[1]);
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if ($tag) {
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$options['tags'][] = $tag;
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}
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}
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}
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if ($entry['type'] !== 'reply' && $entry['type'] !== 'repost') {
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$options['urls'] = [];
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}
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return [$content, $options];
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}
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function linkback_avatar($profile, $url)
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{
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// Ripped from OStatus plugin for now
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$tempfile = new TemporaryFile('gs-avatarlinback');
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$img_data = HTTPClient::quickGet($url);
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// Make sure it's at least an image file. ImageFile can do the rest.
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if (getimagesizefromstring($img_data) === false) {
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return false;
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}
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fwrite($tempfile->getResource(), $img_data);
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fflush($tempfile->getResource());
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// No need to carry this in memory.
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unset($img_data);
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$imagefile = new ImageFile(-1, $tempfile->getRealPath());
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$filename = Avatar::filename(
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$profile->id,
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image_type_to_extension($imagefile->type),
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null,
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common_timestamp()
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);
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$tempfile->commit(Avatar::path($filename));
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$profile->setOriginal($filename);
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}
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function linkback_profile($entry, $mf2, $response, $target)
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{
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if (
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array_key_exists('author', $entry)
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&& array_key_exists('properties', $entry['author'][0])
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) {
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$author = $entry['author'][0]['properties'];
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} else {
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$author = linkback_hcard($mf2, $response->getEffectiveUrl());
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}
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if (!$author) {
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$author = array('name' => $entry['name']);
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}
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if (!isset($author['url']) || empty($author['url'])) {
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$author['url'] = array($response->getEffectiveUrl());
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}
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$user = User::getKV('uri', $author['url'][0]);
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if ($user instanceof User) {
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common_log(LOG_INFO, "Linkback: ignoring linkback from local user: $url");
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return true;
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}
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try {
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$profile = Profile::fromUri($author['url'][0]);
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} catch (UnknownUriException $ex) {
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$profile = Profile::getKV('profileurl', $author['url'][0]);
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}
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// XXX: Is this a good way to create the profile?
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if (!$profile instanceof Profile) {
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$profile = new Profile();
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$profile->profileurl = $author['url'][0];
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$profile->fullname = $author['name'][0];
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$profile->nickname = isset($author['nickname']) ? $author['nickname'][0] : str_replace(' ', '', $author['name'][0]);
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$profile->created = common_sql_now();
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$profile->insert();
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if ($author['photo'] && $author['photo'][0]) {
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linkback_avatar($profile, $author['photo'][0]);
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}
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}
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return array($profile, $author);
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}
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function linkback_save($source, $target, $response, $notice_or_user)
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{
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$dupe = linkback_is_dupe('uri', $response->getEffectiveUrl());
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if (!$dupe) {
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$dupe = linkback_is_dupe('url', $response->getEffectiveUrl());
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}
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if (!$dupe) {
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$dupe = linkback_is_dupe('uri', $source);
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}
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if (!$dupe) {
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$dupe = linkback_is_dupe('url', $source);
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}
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$mf2 = new Mf2\Parser($response->getBody(), $response->getEffectiveUrl());
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$mf2 = $mf2->parse();
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$entry = linkback_find_entry($mf2, $target);
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if (!$entry) {
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preg_match('/<title>([^<]+)', $response->getBody(), $match);
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$entry = array(
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'content' => array('html' => $response->getBody()),
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'name' => $match[1] ? htmlspecialchars_decode($match[1]) : $source
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);
|
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}
|
|
|
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if (!$entry['url']) {
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$entry['url'] = array($response->getEffectiveUrl());
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}
|
|
|
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if (!$dupe) {
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$dupe = linkback_is_dupe('uri', $entry['url'][0]);
|
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}
|
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if (!$dupe) {
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$dupe = linkback_is_dupe('url', $entry['url'][0]);
|
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}
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|
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$entry['type'] = linkback_entry_type($entry, $mf2, $target);
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list($profile, $author) = linkback_profile($entry, $mf2, $response, $target);
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list($content, $options) = linkback_notice($source, $notice_or_user, $entry, $author, $mf2);
|
|
|
|
if ($dupe) {
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$orig = clone($dupe);
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|
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try {
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|
// Ignore duplicate save error
|
|
try {
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$dupe->saveKnownReplies($options['replies']);
|
|
} catch (ServerException $ex) {
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}
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try {
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$dupe->saveKnownTags($options['tags']);
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} catch (ServerException $ex) {
|
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}
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try {
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$dupe->saveKnownUrls($options['urls']);
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} catch (ServerException $ex) {
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}
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if (isset($options['reply_to'])) {
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$dupe->reply_to = $options['reply_to'];
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}
|
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if (isset($options['repeat_of'])) {
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$dupe->repeat_of = $options['repeat_of'];
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}
|
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if ($dupe->reply_to != $orig->reply_to || $dupe->repeat_of != $orig->repeat_of) {
|
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$parent = Notice::getKV('id', $dupe->repeat_of ?: $dupe->reply_to);
|
|
if ($parent instanceof Notice) {
|
|
// If we changed the reply_to or repeat_of we might live in a new conversation now
|
|
$dupe->conversation = $parent->conversation;
|
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}
|
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}
|
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if ($dupe->update($orig)) {
|
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$saved = $dupe;
|
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}
|
|
if (
|
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$dupe->conversation !== $orig->conversation
|
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&& Conversation::noticeCount($orig->conversation) < 1
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) {
|
|
// Delete empty conversation
|
|
$emptyConversation = Conversation::getKV('id', $orig->conversation);
|
|
$emptyConversation->delete();
|
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}
|
|
} catch (Exception $e) {
|
|
common_log(LOG_ERR, "Linkback update of remote message $source failed: " . $e->getMessage());
|
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return false;
|
|
}
|
|
common_log(LOG_INFO, "Linkback updated remote message $source as notice id $saved->id");
|
|
} elseif (
|
|
$entry['type'] === 'like'
|
|
|| ($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(),
|
|
$notice_or_user->getRendered()
|
|
);
|
|
if ($entry['rsvp']) {
|
|
$act->content = $options['rendered'];
|
|
}
|
|
|
|
$act->verb = ActivityVerb::FAVORITE;
|
|
if (strtolower($entry['rsvp'][0]) === 'yes') {
|
|
$act->verb = 'http://activitystrea.ms/schema/1.0/rsvp-yes';
|
|
} elseif (strtolower($entry['rsvp'][0]) === 'no') {
|
|
$act->verb = 'http://activitystrea.ms/schema/1.0/rsvp-no';
|
|
} elseif (strtolower($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();
|
|
}
|