]> git.wh0rd.org - tt-rss.git/blobdiff - plugins/af_redditimgur/init.php
use catchall exception handler for readability
[tt-rss.git] / plugins / af_redditimgur / init.php
old mode 100644 (file)
new mode 100755 (executable)
index 889e2bc..b464286
 <?php
+use andreskrey\Readability\Readability;
+use andreskrey\Readability\Configuration;
+
 class Af_RedditImgur extends Plugin {
+
+       /* @var PluginHost $host */
        private $host;
 
        function about() {
                return array(1.0,
-                       "Inline image links in Reddit RSS feeds",
+                       "Inline images (and other content) in Reddit 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_PREFS_TAB, $this);
        }
 
-       function hook_article_filter($article) {
+       function hook_prefs_tab($args) {
+               if ($args != "prefFeeds") return;
 
-               if (strpos($article["link"], "reddit.com/r/") !== FALSE) {
-                               $doc = new DOMDocument();
-                               @$doc->loadHTML($article["content"]);
-
-                               if ($doc) {
-                                       $xpath = new DOMXPath($doc);
-                                       $entries = $xpath->query('(//a[@href]|//img[@src])');
-
-                                       $found = false;
-
-                                       foreach ($entries as $entry) {
-                                               if ($entry->hasAttribute("href")) {
-                                                                                                               
-                                                       if (preg_match("/\.(gifv)$/i", $entry->getAttribute("href"))) {
-
-                                                                $gifv_meta = fetch_file_contents($entry->getAttribute("href"),
-                                                                        false, false, false, false, 10);
-
-                                                                if ($gifv_meta) {
-                                                                        $adoc = new DOMDocument();
-                                                                        @$adoc->loadHTML($gifv_meta);
-
-                                                                        if ($adoc) {
-                                                                                $axpath = new DOMXPath($adoc);
-                                                                                $aentries = $axpath->query('(//meta)');
-
-                                                                                $width = false;
-                                                                                $height = false;
-
-                                                                                foreach ($aentries as $aentry) {
-                                                                                        if (strpos($aentry->getAttribute("property"), "og:image:width") !== FALSE) {
-                                                                                                $width = $aentry->getAttribute("content");
-                                                                                        }
-                                                                                        if (strpos($aentry->getAttribute("property"), "og:image:height") !== FALSE) {
-                                                                                                $height = $aentry->getAttribute("content");
-                                                                                        }
-                                                                                }
-                                                                        }
-                                                                }
-
-                                                                       if ($width && $height) {
-                                                                
-                                                                        $iframe = $doc->createElement('iframe');
-                                                                        $iframe->setAttribute("src", str_replace("http:", "", $entry->getAttribute("href")));
-                                                                        $iframe->setAttribute("frameborder", "0");
-                                                                        $iframe->setAttribute("width", $width);
-                                                                        $iframe->setAttribute("height", $height);
-
-                                                                        $br = $doc->createElement('br');
-                                                                        $entry->parentNode->insertBefore($iframe, $entry);
-                                                                        $entry->parentNode->insertBefore($br, $entry);
-
-                                                                        // add empty img tag to disable display of attachment
-                                                                        $img = $doc->createElement('img');
-                                                                        $img->setAttribute("src", "data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D");
-                                                                        $img->setAttribute("width", "0");
-                                                                        $img->setAttribute("height", "0");
-                                                                        $entry->parentNode->insertBefore($img, $entry);
-                                                                        $found = true;
-                                                                }
-                                                        }
-
-                                                       if (preg_match("/\.(jpg|jpeg|gif|png)(\?[0-9])?$/i", $entry->getAttribute("href"))) {
-
-                                                               $img = $doc->createElement('img');
-                                                               $img->setAttribute("src", $entry->getAttribute("href"));
+               print "<div dojoType=\"dijit.layout.AccordionPane\" title=\"".__('Reddit content settings (af_redditimgur)')."\">";
+
+               $enable_readability = $this->host->get($this, "enable_readability");
+               $enable_content_dupcheck = $this->host->get($this, "enable_content_dupcheck");
+
+               if (version_compare(PHP_VERSION, '5.6.0', '<')) {
+                       print_error("Readability requires PHP version 5.6.");
+               }
+
+               print "<form dojoType=\"dijit.form.Form\">";
+
+               print "<script type=\"dojo/method\" event=\"onSubmit\" args=\"evt\">
+                       evt.preventDefault();
+                       if (this.validate()) {
+                               console.log(dojo.objectToQuery(this.getValues()));
+                               new Ajax.Request('backend.php', {
+                                       parameters: dojo.objectToQuery(this.getValues()),
+                                       onComplete: function(transport) {
+                                               notify_info(transport.responseText);
+                                       }
+                               });
+                               //this.reset();
+                       }
+                       </script>";
+
+               print_hidden("op", "pluginhandler");
+               print_hidden("method", "save");
+               print_hidden("plugin", "af_redditimgur");
+
+               print_checkbox("enable_readability", $enable_readability);
+               print "&nbsp;<label for=\"enable_readability\">" . __("Extract missing content using Readability") . "</label>";
+
+               print "<br/>";
+
+               print_checkbox("enable_content_dupcheck", $enable_content_dupcheck);
+               print "&nbsp;<label for=\"enable_content_dupcheck\">" . __("Enable additional duplicate checking") . "</label>";
+               print "<p>"; print_button("submit", __("Save"));
+               print "</form>";
+
+               print "</div>";
+       }
+
+       function save() {
+               $enable_readability = checkbox_to_sql_bool($_POST["enable_readability"]);
+               $enable_content_dupcheck = checkbox_to_sql_bool($_POST["enable_content_dupcheck"]);
+
+               $this->host->set($this, "enable_readability", $enable_readability, false);
+               $this->host->set($this, "enable_content_dupcheck", $enable_content_dupcheck);
+
+               echo __("Configuration saved");
+       }
+
+       /**
+        * @SuppressWarnings(PHPMD.UnusedFormalParameter)
+        */
+       private function inline_stuff($article, &$doc, $xpath, $debug = false) {
+
+               $entries = $xpath->query('(//a[@href]|//img[@src])');
+               $img_entries = $xpath->query("(//img[@src])");
+
+               $found = false;
+               //$debug = 1;
+
+               foreach ($entries as $entry) {
+                       if ($entry->hasAttribute("href") && strpos($entry->getAttribute("href"), "reddit.com") === FALSE) {
+
+                               _debug("processing href: " . $entry->getAttribute("href"), $debug);
+
+                               $matches = array();
+
+                               if (!$found && preg_match("/^https?:\/\/twitter.com\/(.*?)\/status\/(.*)/", $entry->getAttribute("href"), $matches)) {
+                                       _debug("handling as twitter: " . $matches[1] . " " . $matches[2], $debug);
+
+                                       $oembed_result = fetch_file_contents("https://publish.twitter.com/oembed?url=" . urlencode($entry->getAttribute("href")));
+
+                                       if ($oembed_result) {
+                                               $oembed_result = json_decode($oembed_result, true);
+
+                                               if ($oembed_result && isset($oembed_result["html"])) {
+
+                                                       $tmp = new DOMDocument();
+                                                       if ($tmp->loadHTML('<?xml encoding="utf-8" ?>' . $oembed_result["html"])) {
+                                                               $p = $doc->createElement("p");
+
+                                                               $p->appendChild($doc->importNode(
+                                                                       $tmp->getElementsByTagName("blockquote")->item(0), TRUE));
 
                                                                $br = $doc->createElement('br');
-                                                               $entry->parentNode->insertBefore($img, $entry);
+                                                               $entry->parentNode->insertBefore($p, $entry);
                                                                $entry->parentNode->insertBefore($br, $entry);
 
-                                                               $found = true;
+                                                               $found = 1;
                                                        }
+                                               }
+                                       }
+                               }
+
+                               if (!$found && preg_match("/\.gfycat.com\/([a-z]+)?(\.[a-z]+)$/i", $entry->getAttribute("href"), $matches)) {
+                                       $entry->setAttribute("href", "http://www.gfycat.com/".$matches[1]);
+                               }
+
+                               if (!$found && preg_match("/https?:\/\/(www\.)?gfycat.com\/([a-z]+)$/i", $entry->getAttribute("href"), $matches)) {
+
+                                       _debug("Handling as Gfycat", $debug);
 
-                                                       // links to imgur pages
-                                                       $matches = array();
-                                                       if (preg_match("/^https?:\/\/imgur.com\/([^\.\/]+$)/", $entry->getAttribute("href"), $matches)) {
+                                       $tmp = fetch_file_contents($entry->getAttribute("href"));
 
-                                                               $token = $matches[1];
+                                       if ($tmp) {
+                                               $tmpdoc = new DOMDocument();
+
+                                               if (@$tmpdoc->loadHTML($tmp)) {
+                                                       $tmpxpath = new DOMXPath($tmpdoc);
+
+                                                       $source_node = $tmpxpath->query("//video[contains(@class,'share-video')]//source[contains(@src, '.mp4')]")->item(0);
+                                                       $poster_node = $tmpxpath->query("//video[contains(@class,'share-video') and @poster]")->item(0);
+
+                                                       if ($source_node && $poster_node) {
+                                                               $source_stream = $source_node->getAttribute("src");
+                                                               $poster_url = $poster_node->getAttribute("poster");
+
+                                                               $this->handle_as_video($doc, $entry, $source_stream, $poster_url);
+                                                               $found = 1;
+                                                       }
+                                               }
+                                       }
+                               }
 
-                                                               $album_content = fetch_file_contents($entry->getAttribute("href"),
-                                                                       false, false, false, false, 10);
+                               if (!$found && preg_match("/https?:\/\/v\.redd\.it\/(.*)$/i", $entry->getAttribute("href"), $matches)) {
 
-                                                               if ($album_content && $token) {
-                                                                       $adoc = new DOMDocument();
-                                                                       @$adoc->loadHTML($album_content);
+                                       _debug("Handling as reddit inline video", $debug);
 
-                                                                       if ($adoc) {
-                                                                               $axpath = new DOMXPath($adoc);
-                                                                               $aentries = $axpath->query('(//img[@src])');
+                                       $img = $img_entries->item(0);
 
-                                                                               foreach ($aentries as $aentry) {
-                                                                                       if (preg_match("/\/\/i.imgur.com\/$token\./", $aentry->getAttribute("src"))) {
-                                                                                               $img = $doc->createElement('img');
-                                                                                               $img->setAttribute("src", $aentry->getAttribute("src"));
+                                       if ($img) {
+                                               $poster_url = $img->getAttribute("src");
+                                       } else {
+                                               $poster_url = false;
+                                       }
 
-                                                                                               $br = $doc->createElement('br');
+                                       // Get original article URL from v.redd.it redirects
+                                       $source_article_url = $this->get_location($matches[0]);
+                                       _debug("Resolved ".$matches[0]." to ".$source_article_url, $debug);
 
-                                                                                               $entry->parentNode->insertBefore($img, $entry);
-                                                                                               $entry->parentNode->insertBefore($br, $entry);
+                                       $source_stream = false;
 
-                                                                                               $found = true;
+                                       if ($source_article_url) {
+                                               $j = json_decode(fetch_file_contents($source_article_url.".json"), true);
 
-                                                                                               break;
-                                                                                       }
+                                               if ($j) {
+                                                       foreach ($j as $listing) {
+                                                               foreach ($listing["data"]["children"] as $child) {
+                                                                       if ($child["data"]["url"] == $matches[0]) {
+                                                                               try {
+                                                                                       $source_stream = $child["data"]["media"]["reddit_video"]["fallback_url"];
+                                                                               }
+                                                                               catch (Exception $e) {
                                                                                }
+                                                                               break 2;
                                                                        }
                                                                }
                                                        }
+                                               }
+                                       }
 
-                                                       // linked albums, ffs
-                                                       if (preg_match("/^https?:\/\/imgur.com\/(a|album)\/[^\.]+$/", $entry->getAttribute("href"), $matches)) {
+                                       if (!$source_stream) {
+                                               $source_stream = "https://v.redd.it/" . $matches[1] . "/DASH_600_K";
+                                       }
 
-                                                               $album_content = fetch_file_contents($entry->getAttribute("href"),
-                                                                       false, false, false, false, 10);
+                                       $this->handle_as_video($doc, $entry, $source_stream, $poster_url);
+                                       $found = 1;
+                               }
 
-                                                               if ($album_content) {
-                                                                       $adoc = new DOMDocument();
-                                                                       @$adoc->loadHTML($album_content);
+                               if (!$found && preg_match("/https?:\/\/(www\.)?streamable.com\//i", $entry->getAttribute("href"))) {
 
-                                                                       if ($adoc) {
-                                                                               $axpath = new DOMXPath($adoc);
-                                                                               $aentries = $axpath->query("//meta[@property='og:image']");
+                                       _debug("Handling as Streamable", $debug);
 
-                                                                               foreach ($aentries as $aentry) {
-                                                                                       $img = $doc->createElement('img');
-                                                                                       $img->setAttribute("src", $aentry->getAttribute("content"));
-                                                                                       $entry->parentNode->insertBefore($doc->createElement('br'), $entry);
+                                       $tmp = fetch_file_contents($entry->getAttribute("href"));
 
-                                                                                       $br = $doc->createElement('br');
+                                       if ($tmp) {
+                                               $tmpdoc = new DOMDocument();
 
-                                                                                       $entry->parentNode->insertBefore($img, $entry);
-                                                                                       $entry->parentNode->insertBefore($br, $entry);
+                                               if (@$tmpdoc->loadHTML($tmp)) {
+                                                       $tmpxpath = new DOMXPath($tmpdoc);
 
-                                                                                       $found = true;
-                                                                               }
-                                                                       }
-                                                               }
+                                                       $source_node = $tmpxpath->query("//video[contains(@class,'video-player-tag')]//source[contains(@src, '.mp4')]")->item(0);
+                                                       $poster_node = $tmpxpath->query("//video[contains(@class,'video-player-tag') and @poster]")->item(0);
+
+                                                       if ($source_node && $poster_node) {
+                                                               $source_stream = $source_node->getAttribute("src");
+                                                               $poster_url = $poster_node->getAttribute("poster");
+
+                                                               $this->handle_as_video($doc, $entry, $source_stream, $poster_url);
+                                                               $found = 1;
                                                        }
                                                }
+                                       }
+                               }
+
+                               // imgur .gif -> .gifv
+                               if (!$found && preg_match("/i\.imgur\.com\/(.*?)\.gif$/i", $entry->getAttribute("href"))) {
+                                       _debug("Handling as imgur gif (->gifv)", $debug);
+
+                                       $entry->setAttribute("href",
+                                               str_replace(".gif", ".gifv", $entry->getAttribute("href")));
+                               }
+
+                               if (!$found && preg_match("/\.(gifv|mp4)$/i", $entry->getAttribute("href"))) {
+                                       _debug("Handling as imgur gifv", $debug);
+
+                                       $source_stream = str_replace(".gifv", ".mp4", $entry->getAttribute("href"));
+
+                                       if (strpos($source_stream, "imgur.com") !== FALSE)
+                                               $poster_url = str_replace(".mp4", "h.jpg", $source_stream);
+
+                                       $this->handle_as_video($doc, $entry, $source_stream, $poster_url, $debug);
+
+                                       $found = true;
+                               }
+
+                               $matches = array();
+                               if (!$found && preg_match("/youtube\.com\/v\/([\w-]+)/", $entry->getAttribute("href"), $matches) ||
+                                       preg_match("/youtube\.com\/.*?[\&\?]v=([\w-]+)/", $entry->getAttribute("href"), $matches) ||
+                                       preg_match("/youtube\.com\/watch\?v=([\w-]+)/", $entry->getAttribute("href"), $matches) ||
+                                       preg_match("/\/\/youtu.be\/([\w-]+)/", $entry->getAttribute("href"), $matches)) {
+
+                                       $vid_id = $matches[1];
+
+                                       _debug("Handling as youtube: $vid_id", $debug);
+
+                                       $iframe = $doc->createElement("iframe");
+                                       $iframe->setAttribute("class", "youtube-player");
+                                       $iframe->setAttribute("type", "text/html");
+                                       $iframe->setAttribute("width", "640");
+                                       $iframe->setAttribute("height", "385");
+                                       $iframe->setAttribute("src", "https://www.youtube.com/embed/$vid_id");
+                                       $iframe->setAttribute("allowfullscreen", "1");
+                                       $iframe->setAttribute("frameborder", "0");
+
+                                       $br = $doc->createElement('br');
+                                       $entry->parentNode->insertBefore($iframe, $entry);
+                                       $entry->parentNode->insertBefore($br, $entry);
+
+                                       $found = true;
+                               }
+
+                               if (!$found && preg_match("/\.(jpg|jpeg|gif|png)(\?[0-9][0-9]*)?$/i", $entry->getAttribute("href")) ||
+                                       mb_strpos($entry->getAttribute("href"), "i.reddituploads.com") !== FALSE ||
+                                       mb_strpos($this->get_content_type($entry->getAttribute("href")), "image/") !== FALSE) {
+
+                                       _debug("Handling as a picture", $debug);
+
+                                       $img = $doc->createElement('img');
+                                       $img->setAttribute("src", $entry->getAttribute("href"));
+
+                                       $br = $doc->createElement('br');
+                                       $entry->parentNode->insertBefore($img, $entry);
+                                       $entry->parentNode->insertBefore($br, $entry);
+
+                                       $found = true;
+                               }
+
+                               // wtf is this even
+                               if (!$found && preg_match("/^https?:\/\/gyazo\.com\/([^\.\/]+$)/", $entry->getAttribute("href"), $matches)) {
+                                       $img_id = $matches[1];
+
+                                       _debug("handling as gyazo: $img_id", $debug);
+
+                                       $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("looking for meta og:image", $debug);
+
+                                       $content = fetch_file_contents(["url" => $entry->getAttribute("href"),
+                                               "http_accept" => "text/*"]);
 
-                                               // remove tiny thumbnails
-                                               if ($entry->hasAttribute("src")) {
-                                                       if ($entry->parentNode && $entry->parentNode->parentNode) {
-                                                               $entry->parentNode->parentNode->removeChild($entry->parentNode);
+                                       if ($content) {
+                                               $cdoc = new DOMDocument();
+
+                                               if (@$cdoc->loadHTML($content)) {
+                                                       $cxpath = new DOMXPath($cdoc);
+
+                                                       $og_image = $cxpath->query("//meta[@property='og:image']")->item(0);
+
+                                                       if ($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);
+
+                                                                       $found = true;
+                                                               }
                                                        }
                                                }
                                        }
+                               }
+
+                       }
+
+                       // remove tiny thumbnails
+                       if ($entry->hasAttribute("src")) {
+                               if ($entry->parentNode && $entry->parentNode->parentNode) {
+                                       $entry->parentNode->parentNode->removeChild($entry->parentNode);
+                               }
+                       }
+               }
+
+               return $found;
+       }
+
+       function hook_article_filter($article) {
+
+               if (strpos($article["link"], "reddit.com/r/") !== FALSE) {
+                       $doc = new DOMDocument();
+                       @$doc->loadHTML($article["content"]);
+                       $xpath = new DOMXPath($doc);
+
+                       $content_link = $xpath->query("(//a[contains(., '[link]')])")->item(0);
+
+                       if ($this->host->get($this, "enable_content_dupcheck")) {
+
+                               if ($content_link) {
+                                       $content_href = $content_link->getAttribute("href");
+                                       $entry_guid = $article["guid_hashed"];
+                                       $owner_uid = $article["owner_uid"];
+
+                                       if (DB_TYPE == "pgsql") {
+                                               $interval_qpart = "date_entered < NOW() - INTERVAL '1 day'";
+                                       } else {
+                                               $interval_qpart = "date_entered < DATE_SUB(NOW(), INTERVAL 1 DAY)";
+                                       }
+
+                                       $sth = $this->pdo->prepare("SELECT COUNT(id) AS cid
+                                               FROM ttrss_entries, ttrss_user_entries WHERE
+                                                       ref_id = id AND
+                                                       $interval_qpart AND
+                                                       guid != ? AND
+                                                       owner_uid = ? AND
+                                                       content LIKE ?");
+
+                                       $sth->execute([$entry_guid, $owner_uid, "%href=\"$content_href\">[link]%"]);
 
-                                       $node = $doc->getElementsByTagName('body')->item(0);
+                                       if ($row = $sth->fetch()) {
+                                               $num_found = $row['cid'];
 
-                                       if ($node && $found) {
-                                               $article["content"] = $doc->saveXML($node);
+                                               if ($num_found > 0) $article["force_catchup"] = true;
                                        }
                                }
+                       }
+
+                       $found = $this->inline_stuff($article, $doc, $xpath);
+
+                       $node = $doc->getElementsByTagName('body')->item(0);
+
+                       if ($node && $found) {
+                               $article["content"] = $doc->saveHTML($node);
+                       } else if ($content_link) {
+                               $article = $this->readability($article, $content_link->getAttribute("href"), $doc, $xpath);
+                       }
                }
 
                return $article;
@@ -180,5 +409,152 @@ class Af_RedditImgur extends Plugin {
                return 2;
        }
 
+       private function handle_as_video($doc, $entry, $source_stream, $poster_url = false, $debug = false) {
+
+               _debug("handle_as_video: $source_stream", $debug);
+
+               $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);
+
+               $img = $doc->createElement('img');
+               $img->setAttribute("src",
+                       "data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D");
+
+               $entry->parentNode->insertBefore($img, $entry);
+       }
+
+       function testurl() {
+               $url = htmlspecialchars($_REQUEST["url"]);
+
+               header("Content-type: text/plain");
+
+               print "URL: $url\n";
+
+               $doc = new DOMDocument();
+               @$doc->loadHTML("<html><body><a href=\"$url\">[link]</a></body>");
+               $xpath = new DOMXPath($doc);
+
+               $found = $this->inline_stuff([], $doc, $xpath, true);
+
+               print "Inline result: $found\n";
+
+               if (!$found) {
+                       print "\nReadability result:\n";
+
+                       $article = $this->readability([], $url, $doc, $xpath, true);
+
+                       print_r($article);
+               } else {
+                       print "\nResulting HTML:\n";
+
+                       print $doc->saveHTML();
+               }
+       }
+
+       private function get_header($url, $useragent = SELF_USER_AGENT, $header) {
+               $ret = false;
+
+               if (function_exists("curl_init") && !defined("NO_CURL")) {
+                       $ch = curl_init($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, $useragent);
+
+                       @curl_exec($ch);
+                       $ret = curl_getinfo($ch, $header);
+               }
+
+               return $ret;
+       }
+
+       private function get_content_type($url, $useragent = SELF_USER_AGENT) {
+               return $this->get_header($url, $useragent, CURLINFO_CONTENT_TYPE);
+       }
+
+       private function get_location($url, $useragent = SELF_USER_AGENT) {
+               return $this->get_header($url, $useragent, CURLINFO_EFFECTIVE_URL);
+       }
+
+       /**
+        * @SuppressWarnings(PHPMD.UnusedFormalParameter)
+        */
+       private function readability($article, $url, $doc, $xpath, $debug = false) {
+
+               if (!defined('NO_CURL') && 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 && version_compare(PHP_VERSION, '5.6.0', '>=')) {
+
+                               /* 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) {
+
+                                       $tmp = fetch_file_contents(["url" => $url,
+                                               "useragent" => $useragent_compat,
+                                               "http_accept" => "text/html"]);
+
+                                       if ($debug) _debug("tmplen: " . mb_strlen($tmp));
+
+                                       if ($tmp && mb_strlen($tmp) < 1024 * 500) {
+
+                                               $r = new Readability(new Configuration());
+
+                                               try {
+                                                       if ($r->parse($tmp)) {
+
+                                                               $tmpxpath = new DOMXPath($r->getDOMDocument());
+
+                                                               $entries = $tmpxpath->query('(//a[@href]|//img[@src])');
+
+                                                               foreach ($entries as $entry) {
+                                                                       if ($entry->hasAttribute("href")) {
+                                                                               $entry->setAttribute("href",
+                                                                                       rewrite_relative_url($url, $entry->getAttribute("href")));
+
+                                                                       }
+
+                                                                       if ($entry->hasAttribute("src")) {
+                                                                               $entry->setAttribute("src",
+                                                                                       rewrite_relative_url($url, $entry->getAttribute("src")));
+
+                                                                       }
+
+                                                               }
+
+                                                               $article["content"] = $r->getContent() . "<hr/>" . $article["content"];
+                                                       }
+                                               } catch (Exception $e) {
+                                                       //
+                                               }
+                                       }
+                               }
+                       }
+               }
+
+               return $article;
+       }
 }
-?>