547 lines
17 KiB
PHP
547 lines
17 KiB
PHP
<?php
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/**
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* @copyright Copyright (C) 2020, Friendica
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*
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* @license GNU AGPL version 3 or any later version
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*
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* This program 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
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* published by the Free Software Foundation, either version 3 of the
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* License, or (at your option) any later version.
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*
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* This program 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 this program. If not, see <https://www.gnu.org/licenses/>.
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*
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*/
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namespace Friendica\Protocol;
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use DOMDocument;
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use DOMXPath;
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use Friendica\Content\Text\HTML;
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use Friendica\Core\Logger;
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use Friendica\Core\Protocol;
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use Friendica\Database\DBA;
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use Friendica\DI;
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use Friendica\Model\Item;
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use Friendica\Util\Network;
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use Friendica\Util\ParseUrl;
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use Friendica\Util\XML;
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/**
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* This class contain functions to import feeds (RSS/RDF/Atom)
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*/
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class Feed {
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/**
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* Read a RSS/RDF/Atom feed and create an item entry for it
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*
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* @param string $xml The feed data
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* @param array $importer The user record of the importer
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* @param array $contact The contact record of the feed
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*
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* @return array Returns the header and the first item in dry run mode
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* @throws \Friendica\Network\HTTPException\InternalServerErrorException
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*/
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public static function import($xml, array $importer = [], array $contact = [])
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{
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$dryRun = empty($importer) && empty($contact);
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if ($dryRun) {
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Logger::info("Test Atom/RSS feed");
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} else {
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Logger::info("Import Atom/RSS feed '" . $contact["name"] . "' (Contact " . $contact["id"] . ") for user " . $importer["uid"]);
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}
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if (empty($xml)) {
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Logger::info('XML is empty.');
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return [];
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}
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if (!empty($contact['poll'])) {
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$basepath = $contact['poll'];
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} elseif (!empty($contact['url'])) {
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$basepath = $contact['url'];
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} else {
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$basepath = '';
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}
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$doc = new DOMDocument();
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@$doc->loadXML(trim($xml));
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$xpath = new DOMXPath($doc);
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$xpath->registerNamespace('atom', ActivityNamespace::ATOM1);
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$xpath->registerNamespace('dc', "http://purl.org/dc/elements/1.1/");
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$xpath->registerNamespace('content', "http://purl.org/rss/1.0/modules/content/");
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$xpath->registerNamespace('rdf', "http://www.w3.org/1999/02/22-rdf-syntax-ns#");
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$xpath->registerNamespace('rss', "http://purl.org/rss/1.0/");
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$xpath->registerNamespace('media', "http://search.yahoo.com/mrss/");
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$xpath->registerNamespace('poco', ActivityNamespace::POCO);
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$author = [];
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$entries = null;
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// Is it RDF?
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if ($xpath->query('/rdf:RDF/rss:channel')->length > 0) {
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$author["author-link"] = XML::getFirstNodeValue($xpath, '/rdf:RDF/rss:channel/rss:link/text()');
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$author["author-name"] = XML::getFirstNodeValue($xpath, '/rdf:RDF/rss:channel/rss:title/text()');
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if (empty($author["author-name"])) {
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$author["author-name"] = XML::getFirstNodeValue($xpath, '/rdf:RDF/rss:channel/rss:description/text()');
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}
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$entries = $xpath->query('/rdf:RDF/rss:item');
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}
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// Is it Atom?
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if ($xpath->query('/atom:feed')->length > 0) {
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$alternate = XML::getFirstAttributes($xpath, "atom:link[@rel='alternate']");
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if (is_object($alternate)) {
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foreach ($alternate AS $attribute) {
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if ($attribute->name == "href") {
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$author["author-link"] = $attribute->textContent;
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}
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}
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}
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if (empty($author["author-link"])) {
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$self = XML::getFirstAttributes($xpath, "atom:link[@rel='self']");
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if (is_object($self)) {
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foreach ($self AS $attribute) {
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if ($attribute->name == "href") {
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$author["author-link"] = $attribute->textContent;
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}
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}
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}
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}
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if (empty($author["author-link"])) {
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$author["author-link"] = XML::getFirstNodeValue($xpath, '/atom:feed/atom:id/text()');
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}
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$author["author-avatar"] = XML::getFirstNodeValue($xpath, '/atom:feed/atom:logo/text()');
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$author["author-name"] = XML::getFirstNodeValue($xpath, '/atom:feed/atom:title/text()');
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if (empty($author["author-name"])) {
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$author["author-name"] = XML::getFirstNodeValue($xpath, '/atom:feed/atom:subtitle/text()');
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}
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if (empty($author["author-name"])) {
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$author["author-name"] = XML::getFirstNodeValue($xpath, '/atom:feed/atom:author/atom:name/text()');
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}
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$value = XML::getFirstNodeValue($xpath, 'atom:author/poco:displayName/text()');
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if ($value != "") {
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$author["author-name"] = $value;
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}
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if ($dryRun) {
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$author["author-id"] = XML::getFirstNodeValue($xpath, '/atom:feed/atom:author/atom:id/text()');
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// See https://tools.ietf.org/html/rfc4287#section-3.2.2
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$value = XML::getFirstNodeValue($xpath, 'atom:author/atom:uri/text()');
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if ($value != "") {
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$author["author-link"] = $value;
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}
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$value = XML::getFirstNodeValue($xpath, 'atom:author/poco:preferredUsername/text()');
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if ($value != "") {
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$author["author-nick"] = $value;
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}
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$value = XML::getFirstNodeValue($xpath, 'atom:author/poco:address/poco:formatted/text()');
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if ($value != "") {
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$author["author-location"] = $value;
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}
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$value = XML::getFirstNodeValue($xpath, 'atom:author/poco:note/text()');
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if ($value != "") {
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$author["author-about"] = $value;
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}
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$avatar = XML::getFirstAttributes($xpath, "atom:author/atom:link[@rel='avatar']");
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if (is_object($avatar)) {
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foreach ($avatar AS $attribute) {
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if ($attribute->name == "href") {
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$author["author-avatar"] = $attribute->textContent;
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}
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}
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}
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}
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$author["edited"] = $author["created"] = XML::getFirstNodeValue($xpath, '/atom:feed/atom:updated/text()');
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$author["app"] = XML::getFirstNodeValue($xpath, '/atom:feed/atom:generator/text()');
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$entries = $xpath->query('/atom:feed/atom:entry');
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}
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// Is it RSS?
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if ($xpath->query('/rss/channel')->length > 0) {
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$author["author-link"] = XML::getFirstNodeValue($xpath, '/rss/channel/link/text()');
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$author["author-name"] = XML::getFirstNodeValue($xpath, '/rss/channel/title/text()');
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$author["author-avatar"] = XML::getFirstNodeValue($xpath, '/rss/channel/image/url/text()');
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if (empty($author["author-name"])) {
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$author["author-name"] = XML::getFirstNodeValue($xpath, '/rss/channel/copyright/text()');
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}
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if (empty($author["author-name"])) {
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$author["author-name"] = XML::getFirstNodeValue($xpath, '/rss/channel/description/text()');
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}
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$author["edited"] = $author["created"] = XML::getFirstNodeValue($xpath, '/rss/channel/pubDate/text()');
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$author["app"] = XML::getFirstNodeValue($xpath, '/rss/channel/generator/text()');
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$entries = $xpath->query('/rss/channel/item');
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}
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if (!$dryRun) {
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$author["author-link"] = $contact["url"];
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if (empty($author["author-name"])) {
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$author["author-name"] = $contact["name"];
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}
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$author["author-avatar"] = $contact["thumb"];
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$author["owner-link"] = $contact["url"];
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$author["owner-name"] = $contact["name"];
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$author["owner-avatar"] = $contact["thumb"];
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}
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$header = [];
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$header["uid"] = $importer["uid"] ?? 0;
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$header["network"] = Protocol::FEED;
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$header["wall"] = 0;
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$header["origin"] = 0;
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$header["gravity"] = GRAVITY_PARENT;
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$header["private"] = Item::PUBLIC;
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$header["verb"] = Activity::POST;
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$header["object-type"] = Activity\ObjectType::NOTE;
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$header["contact-id"] = $contact["id"] ?? 0;
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if (!is_object($entries)) {
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Logger::info("There are no entries in this feed.");
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return [];
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}
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$items = [];
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// Importing older entries first
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for ($i = $entries->length - 1; $i >= 0; --$i) {
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$entry = $entries->item($i);
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$item = array_merge($header, $author);
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$alternate = XML::getFirstAttributes($xpath, "atom:link[@rel='alternate']", $entry);
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if (!is_object($alternate)) {
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$alternate = XML::getFirstAttributes($xpath, "atom:link", $entry);
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}
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if (is_object($alternate)) {
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foreach ($alternate AS $attribute) {
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if ($attribute->name == "href") {
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$item["plink"] = $attribute->textContent;
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}
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}
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}
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if (empty($item["plink"])) {
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$item["plink"] = XML::getFirstNodeValue($xpath, 'link/text()', $entry);
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}
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if (empty($item["plink"])) {
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$item["plink"] = XML::getFirstNodeValue($xpath, 'rss:link/text()', $entry);
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}
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$item["uri"] = XML::getFirstNodeValue($xpath, 'atom:id/text()', $entry);
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if (empty($item["uri"])) {
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$item["uri"] = XML::getFirstNodeValue($xpath, 'guid/text()', $entry);
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}
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if (empty($item["uri"])) {
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$item["uri"] = $item["plink"];
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}
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$orig_plink = $item["plink"];
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$item["plink"] = Network::finalUrl($item["plink"]);
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$item["parent-uri"] = $item["uri"];
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if (!$dryRun) {
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$condition = ["`uid` = ? AND `uri` = ? AND `network` IN (?, ?)",
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$importer["uid"], $item["uri"], Protocol::FEED, Protocol::DFRN];
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$previous = Item::selectFirst(['id'], $condition);
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if (DBA::isResult($previous)) {
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Logger::info("Item with uri " . $item["uri"] . " for user " . $importer["uid"] . " already existed under id " . $previous["id"]);
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continue;
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}
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}
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$item["title"] = XML::getFirstNodeValue($xpath, 'atom:title/text()', $entry);
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if (empty($item["title"])) {
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$item["title"] = XML::getFirstNodeValue($xpath, 'title/text()', $entry);
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}
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if (empty($item["title"])) {
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$item["title"] = XML::getFirstNodeValue($xpath, 'rss:title/text()', $entry);
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}
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$item["title"] = html_entity_decode($item["title"], ENT_QUOTES, 'UTF-8');
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$published = XML::getFirstNodeValue($xpath, 'atom:published/text()', $entry);
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if (empty($published)) {
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$published = XML::getFirstNodeValue($xpath, 'pubDate/text()', $entry);
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}
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if (empty($published)) {
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$published = XML::getFirstNodeValue($xpath, 'dc:date/text()', $entry);
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}
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$updated = XML::getFirstNodeValue($xpath, 'atom:updated/text()', $entry);
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if (empty($updated) && !empty($published)) {
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$updated = $published;
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}
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if (empty($published) && !empty($updated)) {
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$published = $updated;
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}
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if ($published != "") {
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$item["created"] = $published;
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}
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if ($updated != "") {
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$item["edited"] = $updated;
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}
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$creator = XML::getFirstNodeValue($xpath, 'author/text()', $entry);
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if (empty($creator)) {
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$creator = XML::getFirstNodeValue($xpath, 'atom:author/atom:name/text()', $entry);
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}
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if (empty($creator)) {
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$creator = XML::getFirstNodeValue($xpath, 'dc:creator/text()', $entry);
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}
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if ($creator != "") {
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$item["author-name"] = $creator;
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}
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$creator = XML::getFirstNodeValue($xpath, 'dc:creator/text()', $entry);
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if ($creator != "") {
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$item["author-name"] = $creator;
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}
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/// @TODO ?
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// <category>Ausland</category>
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// <media:thumbnail width="152" height="76" url="http://www.taz.de/picture/667875/192/14388767.jpg"/>
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$attachments = [];
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$enclosures = $xpath->query("enclosure|atom:link[@rel='enclosure']", $entry);
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foreach ($enclosures AS $enclosure) {
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$href = "";
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$length = "";
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$type = "";
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foreach ($enclosure->attributes AS $attribute) {
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if (in_array($attribute->name, ["url", "href"])) {
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$href = $attribute->textContent;
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} elseif ($attribute->name == "length") {
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$length = $attribute->textContent;
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} elseif ($attribute->name == "type") {
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$type = $attribute->textContent;
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}
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}
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if (!empty($item["attach"])) {
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$item["attach"] .= ',';
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} else {
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$item["attach"] = '';
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}
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$attachments[] = ["link" => $href, "type" => $type, "length" => $length];
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$item["attach"] .= '[attach]href="' . $href . '" length="' . $length . '" type="' . $type . '"[/attach]';
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}
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$tags = '';
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$categories = $xpath->query("category", $entry);
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foreach ($categories AS $category) {
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$hashtag = $category->nodeValue;
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if ($tags != '') {
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$tags .= ', ';
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}
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$taglink = "#[url=" . DI::baseUrl() . "/search?tag=" . $hashtag . "]" . $hashtag . "[/url]";
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$tags .= $taglink;
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}
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$body = trim(XML::getFirstNodeValue($xpath, 'atom:content/text()', $entry));
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if (empty($body)) {
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$body = trim(XML::getFirstNodeValue($xpath, 'content:encoded/text()', $entry));
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}
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$summary = trim(XML::getFirstNodeValue($xpath, 'atom:summary/text()', $entry));
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if (empty($summary)) {
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$summary = trim(XML::getFirstNodeValue($xpath, 'description/text()', $entry));
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}
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if (empty($body)) {
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$body = $summary;
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$summary = '';
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}
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if ($body == $summary) {
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$summary = '';
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}
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// remove the content of the title if it is identically to the body
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// This helps with auto generated titles e.g. from tumblr
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if (self::titleIsBody($item["title"], $body)) {
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$item["title"] = "";
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}
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$item["body"] = HTML::toBBCode($body, $basepath);
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if (($item["body"] == '') && ($item["title"] != '')) {
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$item["body"] = $item["title"];
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$item["title"] = '';
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}
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$preview = '';
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if (!empty($contact["fetch_further_information"]) && ($contact["fetch_further_information"] < 3)) {
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// Handle enclosures and treat them as preview picture
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foreach ($attachments AS $attachment) {
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if ($attachment["type"] == "image/jpeg") {
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$preview = $attachment["link"];
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}
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}
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// Remove a possible link to the item itself
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$item["body"] = str_replace($item["plink"], '', $item["body"]);
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$item["body"] = trim(preg_replace('/\[url\=\](\w+.*?)\[\/url\]/i', '', $item["body"]));
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// Replace the content when the title is longer than the body
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$replace = (strlen($item["title"]) > strlen($item["body"]));
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// Replace it, when there is an image in the body
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if (strstr($item["body"], '[/img]')) {
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$replace = true;
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}
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// Replace it, when there is a link in the body
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if (strstr($item["body"], '[/url]')) {
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$replace = true;
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}
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if ($replace) {
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$item["body"] = trim($item["title"]);
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}
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$data = ParseUrl::getSiteinfoCached($item['plink'], true);
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if (!empty($data['text']) && !empty($data['title']) && (mb_strlen($item['body']) < mb_strlen($data['text']))) {
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// When the fetched page info text is longer than the body, we do try to enhance the body
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if (!empty($item['body']) && (strpos($data['title'], $item['body']) === false) && (strpos($data['text'], $item['body']) === false)) {
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// The body is not part of the fetched page info title or page info text. So we add the text to the body
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$item['body'] .= "\n\n" . $data['text'];
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} else {
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// Else we replace the body with the page info text
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$item['body'] = $data['text'];
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}
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}
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// We always strip the title since it will be added in the page information
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$item["title"] = "";
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$item["body"] = $item["body"] . add_page_info($item["plink"], false, $preview, ($contact["fetch_further_information"] == 2), $contact["ffi_keyword_blacklist"]);
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$item["tag"] = add_page_keywords($item["plink"], $preview, ($contact["fetch_further_information"] == 2), $contact["ffi_keyword_blacklist"]);
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$item["object-type"] = Activity\ObjectType::BOOKMARK;
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unset($item["attach"]);
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} else {
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if (!empty($summary)) {
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$item["body"] = '[abstract]' . HTML::toBBCode($summary, $basepath) . "[/abstract]\n" . $item["body"];
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}
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if (!empty($contact["fetch_further_information"]) && ($contact["fetch_further_information"] == 3)) {
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if (!empty($tags)) {
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$item["tag"] = $tags;
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} else {
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// @todo $preview is never set in this case, is it intended? - @MrPetovan 2018-02-13
|
|
$item["tag"] = add_page_keywords($item["plink"], $preview, true, $contact["ffi_keyword_blacklist"]);
|
|
}
|
|
$item["body"] .= "\n" . $item['tag'];
|
|
}
|
|
|
|
// Add the link to the original feed entry if not present in feed
|
|
if (($item['plink'] != '') && !strstr($item["body"], $item['plink'])) {
|
|
$item["body"] .= "[hr][url]" . $item['plink'] . "[/url]";
|
|
}
|
|
}
|
|
|
|
if ($dryRun) {
|
|
$items[] = $item;
|
|
break;
|
|
} else {
|
|
Logger::info("Stored feed: " . print_r($item, true));
|
|
|
|
$notify = Item::isRemoteSelf($contact, $item);
|
|
|
|
// Distributed items should have a well formatted URI.
|
|
// Additionally we have to avoid conflicts with identical URI between imported feeds and these items.
|
|
if ($notify) {
|
|
$item['guid'] = Item::guidFromUri($orig_plink, DI::baseUrl()->getHostname());
|
|
unset($item['uri']);
|
|
unset($item['parent-uri']);
|
|
|
|
// Set the delivery priority for "remote self" to "medium"
|
|
$notify = PRIORITY_MEDIUM;
|
|
}
|
|
|
|
$id = Item::insert($item, false, $notify);
|
|
|
|
Logger::info("Feed for contact " . $contact["url"] . " stored under id " . $id);
|
|
}
|
|
}
|
|
|
|
return ["header" => $author, "items" => $items];
|
|
}
|
|
|
|
private static function titleIsBody($title, $body)
|
|
{
|
|
$title = strip_tags($title);
|
|
$title = trim($title);
|
|
$title = html_entity_decode($title, ENT_QUOTES, 'UTF-8');
|
|
$title = str_replace(["\n", "\r", "\t", " "], ["", "", "", ""], $title);
|
|
|
|
$body = strip_tags($body);
|
|
$body = trim($body);
|
|
$body = html_entity_decode($body, ENT_QUOTES, 'UTF-8');
|
|
$body = str_replace(["\n", "\r", "\t", " "], ["", "", "", ""], $body);
|
|
|
|
if (strlen($title) < strlen($body)) {
|
|
$body = substr($body, 0, strlen($title));
|
|
}
|
|
|
|
if (($title != $body) && (substr($title, -3) == "...")) {
|
|
$pos = strrpos($title, "...");
|
|
if ($pos > 0) {
|
|
$title = substr($title, 0, $pos);
|
|
$body = substr($body, 0, $pos);
|
|
}
|
|
}
|
|
return ($title == $body);
|
|
}
|
|
}
|