From 0b15471029dab95dc48e94ecaa73cdd9acd6fbaf Mon Sep 17 00:00:00 2001 From: Andrew Dolgov Date: Fri, 9 Jun 2023 08:36:15 +0300 Subject: initial --- init.php | 441 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 441 insertions(+) create mode 100644 init.php (limited to 'init.php') diff --git a/init.php b/init.php new file mode 100644 index 0000000..739c2c3 --- /dev/null +++ b/init.php @@ -0,0 +1,441 @@ + */ + private $domain_blacklist = [ "github.com" ]; + + /** @var array> */ + private $generated_enclosures = []; + + function about() { + return array(null, + "Inline images (and other content) in Lemmy.ml RSS feeds", + "fox"); + } + + function flags() { + return array("needs_curl" => true); + } + + function init($host) { + $this->host = $host; + + $host->add_hook($host::HOOK_ARTICLE_FILTER, $this); + $host->add_hook($host::HOOK_PRE_SUBSCRIBE, $this); + } + + function hook_pre_subscribe(&$url, $auth_login, $auth_pass) { + + // TODO + + return false; + } + + /** + * @param array $article + * @param DOMDocument $doc + * @param DOMXPath $xpath + * @return bool + * @throws PDOException + */ + private function inline_stuff(array &$article, DOMDocument &$doc, DOMXpath $xpath, string $origin_domain) : bool { + + $found = false; + $this->generated_enclosures = []; + $entries = $xpath->query('//a[@href]'); + + foreach ($entries as $entry) { + $entry_href = UrlHelper::rewrite_relative($article["link"], $entry->getAttribute("href"), "a"); + + $matches = []; + + /* skip links going back to origin (and any other blacklisted stuff, including /u/user profiles, except for /pictrs) */ + if (!$found && + strpos($entry_href, "/pictrs/") === FALSE && + (strpos($entry_href, "/u/") !== FALSE || $this->is_blacklisted($entry_href, [$origin_domain]))) { + Debug::log("BODY: URL $entry_href is blacklisted, skipping", Debug::LOG_EXTENDED); + continue; + } + + Debug::log("BODY: processing URL: " . $entry_href, Debug::LOG_VERBOSE); + + if (!$found && preg_match("/^https?:\/\/twitter.com\/(.*?)\/status\/(.*)/", $entry_href, $matches)) { + Debug::log("handling as twitter: " . $matches[1] . " " . $matches[2], Debug::LOG_VERBOSE); + + $oembed_result = UrlHelper::fetch("https://publish.twitter.com/oembed?url=" . urlencode($entry_href)); + + if ($oembed_result) { + $oembed_result = json_decode($oembed_result, true); + + if ($oembed_result && isset($oembed_result["html"])) { + + $tmp = new DOMDocument(); + if (@$tmp->loadHTML('' . $oembed_result["html"])) { + $p = $doc->createElement("p"); + + $p->appendChild($doc->importNode( + $tmp->getElementsByTagName("blockquote")->item(0), TRUE)); + + $br = $doc->createElement('br'); + $entry->parentNode->insertBefore($p, $entry); + $entry->parentNode->insertBefore($br, $entry); + + $found = 1; + } + } + } + } + + if (!$found && preg_match("/\.gfycat.com\/([a-z]+)?(\.[a-z]+)$/i", $entry_href, $matches)) { + $entry->setAttribute("href", "http://www.gfycat.com/".$matches[1]); + } + + if (!$found && preg_match("/https?:\/\/(www\.)?gfycat.com\/([a-z]+)$/i", $entry_href, $matches)) { + + Debug::log("Handling as Gfycat", Debug::LOG_VERBOSE); + + $source_stream = 'https://giant.gfycat.com/' . $matches[2] . '.mp4'; + $poster_url = 'https://thumbs.gfycat.com/' . $matches[2] . '-mobile.jpg'; + + $content_type = $this->get_content_type($source_stream); + + if (strpos($content_type, "video/") !== false) { + $this->handle_as_video($doc, $entry, $source_stream, $poster_url); + $found = 1; + } + } + + // imgur .gif -> .gifv + if (!$found && preg_match("/i\.imgur\.com\/(.*?)\.gif$/i", $entry_href)) { + Debug::log("Handling as imgur gif (->gifv)", Debug::LOG_VERBOSE); + + $entry->setAttribute("href", + str_replace(".gif", ".gifv", $entry_href)); + } + + if (!$found && preg_match("/\.(gifv|mp4)$/i", $entry_href)) { + Debug::log("Handling as imgur gifv", Debug::LOG_VERBOSE); + + $source_stream = str_replace(".gifv", ".mp4", $entry_href); + + if (strpos($source_stream, "imgur.com") !== false) + $poster_url = str_replace(".mp4", "h.jpg", $source_stream); + else + $poster_url = false; + + $this->handle_as_video($doc, $entry, $source_stream, $poster_url); + + $found = true; + } + + $matches = array(); + if (!$found && $vid_id = UrlHelper::url_to_youtube_vid($entry_href)) { + + Debug::log("Handling as youtube: $vid_id", Debug::LOG_VERBOSE); + + /* normalize video URL for af_youtube_... plugins */ + $video_url = "https://www.youtube.com/v/$vid_id"; + + /* push generated video URL to enclosures so that youtube embed plugins would deal with it later (if enabled) */ + $this->generated_enclosures[] = [$video_url, "text/html", null, null, '', '']; + + $found = true; + } + + if (!$found && (preg_match("/\.(jpg|jpeg|gif|png)(\?[0-9][0-9]*)?[$\?]?/i", $entry_href) || + /* mb_strpos($entry_href, "i.reddituploads.com") !== false || */ + mb_strpos($this->get_content_type($entry_href), "image/") !== false)) { + + Debug::log("Handling as a picture", Debug::LOG_VERBOSE); + + $img = $doc->createElement('img'); + $img->setAttribute("src", $entry_href); + + $br = $doc->createElement('br'); + $entry->parentNode->insertBefore($img, $entry); + $entry->parentNode->insertBefore($br, $entry); + + $found = true; + } + + // imgur via link rel="image_src" href="..." + if (!$found && preg_match("/imgur/", $entry_href)) { + + Debug::log("handling as imgur page/whatever", Debug::LOG_VERBOSE); + + $content_type = $this->get_content_type($entry_href); + + if ($content_type && strpos($content_type, "text/html") !== false) { + + $content = UrlHelper::fetch(["url" => $entry_href, + "http_accept" => "text/*"]); + + if ($content) { + $cdoc = new DOMDocument(); + + if (@$cdoc->loadHTML($content)) { + $cxpath = new DOMXPath($cdoc); + + /** @var ?DOMElement $rel_image */ + $rel_image = $cxpath->query("//link[@rel='image_src']")->item(0); + + if ($rel_image) { + + $img = $doc->createElement('img'); + $img->setAttribute("src", $rel_image->getAttribute("href")); + + $br = $doc->createElement('br'); + $entry->parentNode->insertBefore($img, $entry); + $entry->parentNode->insertBefore($br, $entry); + + $found = true; + } + } + } + + } else { + Debug::log("skipping imgur $entry_href because of content type: $content_type", Debug::LOG_VERBOSE); + } + } + + // wtf is this even + if (!$found && preg_match("/^https?:\/\/gyazo\.com\/([^\.\/]+$)/", $entry_href, $matches)) { + $img_id = $matches[1]; + + Debug::log("handling as gyazo: $img_id", Debug::LOG_VERBOSE); + + $img = $doc->createElement('img'); + $img->setAttribute("src", "https://i.gyazo.com/$img_id.jpg"); + + $br = $doc->createElement('br'); + $entry->parentNode->insertBefore($img, $entry); + $entry->parentNode->insertBefore($br, $entry); + + $found = true; + } + + // let's try meta properties + if (!$found) { + Debug::log("looking for meta og:image", Debug::LOG_VERBOSE); + + $content_type = $this->get_content_type($entry_href); + + if ($content_type && strpos($content_type, "text/html") !== false) { + + $content = UrlHelper::fetch(["url" => $entry_href, + "http_accept" => "text/*"]); + + if ($content) { + $cdoc = new DOMDocument(); + + if (@$cdoc->loadHTML($content)) { + $cxpath = new DOMXPath($cdoc); + + /** @var ?DOMElement $og_image */ + $og_image = $cxpath->query("//meta[@property='og:image']")->item(0); + + /** @var ?DOMElement $og_video */ + $og_video = $cxpath->query("//meta[@property='og:video']")->item(0); + + if ($og_video) { + + $source_stream = $og_video->getAttribute("content"); + + if ($source_stream) { + + if ($og_image) { + $poster_url = $og_image->getAttribute("content"); + } else { + $poster_url = false; + } + + $this->handle_as_video($doc, $entry, $source_stream, $poster_url); + $found = true; + } + + } else if ($og_image) { + + $og_src = $og_image->getAttribute("content"); + + if ($og_src) { + $img = $doc->createElement('img'); + $img->setAttribute("src", $og_src); + + $br = $doc->createElement('br'); + $entry->parentNode->insertBefore($img, $entry); + $entry->parentNode->insertBefore($br, $entry); + + $found = true; + } + } + } + } + } else { + Debug::log("BODY: skipping $entry_href because of content type: $content_type", Debug::LOG_VERBOSE); + } + } + } + + return $found > 0; + } + + function hook_article_filter($article) { + + if (preg_match("/lemmy.ml\/post\/[0-9]{1,}$/", $article['link']) !== false && !empty($article["content"])) { + $doc = new DOMDocument(); + + if (@$doc->loadHTML($article["content"])) { + $xpath = new DOMXPath($doc); + + if ($this->is_blacklisted($article['link'])) + return $article; + + $origin_domain = parse_url($article["feed"]["site_url"] ?? '', PHP_URL_HOST); + + $found = $this->inline_stuff($article, $doc, $xpath, $origin_domain); + $node = $doc->getElementsByTagName('body')->item(0); + + if ($node && $found) { + $article["content"] = $doc->saveHTML($node); + $article["enclosures"] = $this->generated_enclosures; + } else { + // $article = $this->readability($article, $content_href, $doc, $xpath); + } + } + } + + return $article; + } + + private function handle_as_image(DOMDocument $doc, DOMElement $entry, string $image_url, string $link_url = "") : void { + $img = $doc->createElement("img"); + $img->setAttribute("src", $image_url); + + $p = $doc->createElement("p"); + + if ($link_url) { + $a = $doc->createElement("a"); + $a->setAttribute("href", $link_url); + + $a->appendChild($img); + $p->appendChild($a); + } else { + $p->appendChild($img); + } + + $entry->parentNode->insertBefore($p, $entry); + } + + private function handle_as_video(DOMDocument $doc, DOMElement $entry, string $source_stream, string $poster_url = "") : void { + + Debug::log("handle_as_video: $source_stream", Debug::LOG_VERBOSE); + + $video = $doc->createElement('video'); + $video->setAttribute("autoplay", "1"); + $video->setAttribute("controls", "1"); + $video->setAttribute("loop", "1"); + + if ($poster_url) $video->setAttribute("poster", $poster_url); + + $source = $doc->createElement('source'); + $source->setAttribute("src", $source_stream); + $source->setAttribute("type", "video/mp4"); + + $video->appendChild($source); + + $br = $doc->createElement('br'); + $entry->parentNode->insertBefore($video, $entry); + $entry->parentNode->insertBefore($br, $entry); + } + + /** $useragent defaults to Config::get_user_agent() */ + private function get_header(string $url, int $header, string $useragent = "") : string { + $ret = ""; + + if (function_exists("curl_init")) { + $ch = curl_init($url); + curl_setopt($ch, CURLOPT_TIMEOUT, 5); + curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); + curl_setopt($ch, CURLOPT_HEADER, true); + curl_setopt($ch, CURLOPT_NOBODY, true); + curl_setopt($ch, CURLOPT_FOLLOWLOCATION, !ini_get("open_basedir")); + curl_setopt($ch, CURLOPT_USERAGENT, $useragent ? $useragent : Config::get_user_agent()); + + @curl_exec($ch); + $ret = curl_getinfo($ch, $header); + } + + return $ret; + } + + private function get_content_type(string $url, string $useragent = "") : string { + return $this->get_header($url, CURLINFO_CONTENT_TYPE, $useragent); + } + + /** + * @param array $article + * @param string $url + * @param DOMDocument $doc + * @param DOMXPath $xpath + * @param bool $debug + * @return array + * @throws PDOException + */ + private function readability(array $article, string $url, DOMDocument $doc, DOMXpath $xpath, bool $debug = false) : array { + + if (function_exists("curl_init") && $this->host->get($this, "enable_readability") && + mb_strlen(strip_tags($article["content"])) <= 150) { + + // do not try to embed posts linking back to other reddit posts + // readability.php requires PHP 5.6 + if ($url && strpos($url, "reddit.com") === false) { + + /* link may lead to a huge video file or whatever, we need to check content type before trying to + parse it which p much requires curl */ + + $useragent_compat = "Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.1; WOW64; Trident/6.0)"; + $content_type = $this->get_content_type($url, $useragent_compat); + + if ($content_type && strpos($content_type, "text/html") !== false) { + + $this->host->run_hooks_callback(PluginHost::HOOK_GET_FULL_TEXT, + function ($result) use (&$article) { + if ($result) { + $article["content"] = $result; + return true; + } + }, + $url); + } + } + } + + return $article; + } + + /** + * @param string $src + * @param array $also_blacklist + * @return bool + */ + private function is_blacklisted(string $src, array $also_blacklist = []) : bool { + $src_domain = parse_url($src, PHP_URL_HOST); + + if ($src_domain) + foreach ([...$this->domain_blacklist, ...$also_blacklist] as $domain) { + if (strstr($src_domain, $domain) !== false) { + return true; + } + } + + return false; + } + + function api_version() { + return 2; + } + +} -- cgit v1.2.3