]> git.wh0rd.org - tt-rss.git/blobdiff - include/functions2.php
Prevent target='_blank' vulnerability on dynamic link
[tt-rss.git] / include / functions2.php
index 9bbfc7b2278dcef2db3c32f7cf8c07c80391c384..96274b6a0dc141a28f51a3b09f490ac38b7e9ad2 100644 (file)
 
                $params['simple_update'] = defined('SIMPLE_UPDATE_MODE') && SIMPLE_UPDATE_MODE;
 
+               $params["icon_alert"] = base64_img("images/alert.png");
+               $params["icon_information"] = base64_img("images/information.png");
+               $params["icon_cross"] = base64_img("images/cross.png");
+               $params["icon_indicator_white"] = base64_img("images/indicator_white.gif");
+
                return $params;
        }
 
@@ -64,8 +69,6 @@
                                "toggle_publ" => __("Toggle published"),
                                "toggle_unread" => __("Toggle unread"),
                                "edit_tags" => __("Edit tags"),
-                               "dismiss_selected" => __("Dismiss selected"),
-                               "dismiss_read" => __("Dismiss read"),
                                "open_in_new_window" => __("Open in new window"),
                                "catchup_below" => __("Mark below as read"),
                                "catchup_above" => __("Mark above as read"),
@@ -91,6 +94,7 @@
                                "feed_edit" => __("Edit feed"),
                                "feed_catchup" => __("Mark as read"),
                                "feed_reverse" => __("Reverse headlines"),
+                               "feed_toggle_vgroup" => __("Toggle headline grouping"),
                                "feed_debug_update" => __("Debug feed update"),
                                "feed_debug_viewfeed" => __("Debug viewfeed()"),
                                "catchup_all" => __("Mark all feeds as read"),
                                "*s" => "toggle_publ",
                                "u" => "toggle_unread",
                                "*t" => "edit_tags",
-                               "*d" => "dismiss_selected",
-                               "*x" => "dismiss_read",
                                "o" => "open_in_new_window",
                                "c p" => "catchup_below",
                                "c n" => "catchup_above",
                                "f e" => "feed_edit",
                                "f q" => "feed_catchup",
                                "f x" => "feed_reverse",
+                               "f g" => "feed_toggle_vgroup",
                                "f *d" => "feed_debug_update",
                                "f *g" => "feed_debug_viewfeed",
                                "f *c" => "toggle_combined_mode",
 
        function check_for_update() {
                if (defined("GIT_VERSION_TIMESTAMP")) {
-                       $content = @fetch_file_contents("http://tt-rss.org/version.json");
+                       $content = @fetch_file_contents(array("url" => "http://tt-rss.org/version.json", "timeout" => 5));
 
                        if ($content) {
                                $content = json_decode($content, true);
                return "";
        }
 
-       function make_runtime_info() {
+       function make_runtime_info($disable_update_check = false) {
                $data = array();
 
                $result = db_query("SELECT MAX(id) AS mid, COUNT(*) AS nf FROM
                $data['reload_on_ts_change'] = !defined('_NO_RELOAD_ON_TS_CHANGE');
 
 
-               if (CHECK_FOR_UPDATES && $_SESSION["last_version_check"] + 86400 + rand(-1000, 1000) < time()) {
+               if (CHECK_FOR_UPDATES && !$disable_update_check && $_SESSION["last_version_check"] + 86400 + rand(-1000, 1000) < time()) {
                        $update_result = @check_for_update();
 
                        $data["update_result"] = $update_result;
 
        function search_to_sql($search, $search_language) {
 
-               $keywords = str_getcsv($search, " ");
+               $keywords = str_getcsv(trim($search), " ");
                $query_keywords = array();
                $search_words = array();
                $search_query_leftover = array();
                $override_vfeed = isset($params["override_vfeed"]) ? $params["override_vfeed"] : false;
                $start_ts = isset($params["start_ts"]) ? $params["start_ts"] : false;
                $check_first_id = isset($params["check_first_id"]) ? $params["check_first_id"] : false;
-               $api_request = isset($params["api_request"]) ? $params["api_request"] : false;
+               $skip_first_id_check = isset($params["skip_first_id_check"]) ? $params["skip_first_id_check"] : false;
 
                $ext_tables_part = "";
                $query_strategy_part = "";
                        }
 
                        $view_query_part = "";
-                       $disable_offsets = false;
 
                        if ($view_mode == "adaptive") {
                                if ($search) {
 
                                        if ($unread > 0) {
                                                $view_query_part = " unread = true AND ";
-                                               $disable_offsets = !$api_request && get_pref("CDM_AUTO_CATCHUP") && get_pref("CDM_EXPANDED");
                                        }
                                }
                        }
 
                        if ($view_mode == "unread" && $feed != -6) {
                                $view_query_part = " unread = true AND ";
-                               $disable_offsets = !$api_request && get_pref("CDM_AUTO_CATCHUP") && get_pref("CDM_EXPANDED");
                        }
 
                        if ($limit > 0) {
                                $query_strategy_part = "unread = false AND last_read IS NOT NULL";
 
                                if (DB_TYPE == "pgsql") {
-                                       $query_strategy_part .= " AND date_entered > NOW() - INTERVAL '1 DAY' ";
+                                       $query_strategy_part .= " AND last_read > NOW() - INTERVAL '1 DAY' ";
                                } else {
-                                       $query_strategy_part .= " AND date_entered > DATE_SUB(NOW(), INTERVAL 1 DAY) ";
+                                       $query_strategy_part .= " AND last_read > DATE_SUB(NOW(), INTERVAL 1 DAY) ";
                                }
 
                                $vfeed_query_part = "ttrss_feeds.title AS feed_title,";
                                        $sanity_interval_qpart = "date_entered >= DATE_SUB(NOW(), INTERVAL 1 hour) AND";
                                }
 
-                               if (!$search && !$disable_offsets) {
+                               if (!$search && !$skip_first_id_check) {
                                        // if previous topmost article id changed that means our current pagination is no longer valid
                                        $query = "SELECT DISTINCT
                                                        ttrss_feeds.title,
                                        }
                                }
 
-                               if ($disable_offsets) {
-                                       $offset_query_part = "";
-                               }
-
                                $query = "SELECT DISTINCT
                                                date_entered,
                                                guid,
                                                        marked,
                                                        num_comments,
                                                        comments,
+                                                       int_id,
                                                        tag_cache,
                                                        label_cache,
                                                        link,
        }
 
        function iframe_whitelisted($entry) {
-               $whitelist = array("youtube.com", "youtu.be", "vimeo.com");
+               $whitelist = array("youtube.com", "youtu.be", "vimeo.com", "player.vimeo.com");
 
                @$src = parse_url($entry->getAttribute("src"), PHP_URL_HOST);
 
                $doc->loadHTML($charset_hack . $res);
                $xpath = new DOMXPath($doc);
 
-               $entries = $xpath->query('(//a[@href]|//img[@src])');
+               $ttrss_uses_https = parse_url(get_self_url_prefix(), PHP_URL_SCHEME) === 'https';
+               $rewrite_base_url = $site_url ? $site_url : SELF_URL_PATH;
+
+               $entries = $xpath->query('(//a[@href]|//img[@src]|//video/source[@src])');
 
                foreach ($entries as $entry) {
 
-                       if ($site_url) {
+                       if ($entry->hasAttribute('href')) {
+                               $entry->setAttribute('href',
+                                       rewrite_relative_url($rewrite_base_url, $entry->getAttribute('href')));
 
-                               if ($entry->hasAttribute('href')) {
-                                       $entry->setAttribute('href',
-                                               rewrite_relative_url($site_url, $entry->getAttribute('href')));
+                               $entry->setAttribute('rel', 'noopener noreferrer');
+                       }
 
-                                       $entry->setAttribute('rel', 'noreferrer');
-                               }
+                       if ($entry->hasAttribute('src')) {
+                               $src = rewrite_relative_url($rewrite_base_url, $entry->getAttribute('src'));
 
-                               if ($entry->hasAttribute('src')) {
-                                       $src = rewrite_relative_url($site_url, $entry->getAttribute('src'));
+                               $extension = $entry->tagName == 'source' ? '.mp4' : '.png';
+                               $cached_filename = CACHE_DIR . '/images/' . sha1($src) . $extension;
 
-                                       $cached_filename = CACHE_DIR . '/images/' . sha1($src) . '.png';
+                               if (file_exists($cached_filename)) {
+                                       $src = get_self_url_prefix() . '/public.php?op=cached_image&hash=' . sha1($src) . $extension;
 
-                                       if (file_exists($cached_filename)) {
-                                               $src = SELF_URL_PATH . '/public.php?op=cached_image&hash=' . sha1($src);
+                                       if ($entry->hasAttribute('srcset')) {
+                                               $entry->removeAttribute('srcset');
                                        }
 
-                                       $entry->setAttribute('src', $src);
+                                       if ($entry->hasAttribute('sizes')) {
+                                               $entry->removeAttribute('sizes');
+                                       }
                                }
 
-                               if ($entry->nodeName == 'img') {
-                                       if (($owner && get_pref("STRIP_IMAGES", $owner)) ||
-                                                       $force_remove_images || $_SESSION["bw_limit"]) {
+                               $entry->setAttribute('src', $src);
+                       }
 
-                                               $p = $doc->createElement('p');
+                       if ($entry->nodeName == 'img') {
 
-                                               $a = $doc->createElement('a');
-                                               $a->setAttribute('href', $entry->getAttribute('src'));
+                               if ($entry->hasAttribute('src')) {
+                                       $is_https_url = parse_url($entry->getAttribute('src'), PHP_URL_SCHEME) === 'https';
 
-                                               $a->appendChild(new DOMText($entry->getAttribute('src')));
-                                               $a->setAttribute('target', '_blank');
+                                       if ($ttrss_uses_https && !$is_https_url) {
 
-                                               $p->appendChild($a);
+                                               if ($entry->hasAttribute('srcset')) {
+                                                       $entry->removeAttribute('srcset');
+                                               }
 
-                                               $entry->parentNode->replaceChild($p, $entry);
+                                               if ($entry->hasAttribute('sizes')) {
+                                                       $entry->removeAttribute('sizes');
+                                               }
                                        }
                                }
+
+                               if (($owner && get_pref("STRIP_IMAGES", $owner)) ||
+                                               $force_remove_images || $_SESSION["bw_limit"]) {
+
+                                       $p = $doc->createElement('p');
+
+                                       $a = $doc->createElement('a');
+                                       $a->setAttribute('href', $entry->getAttribute('src'));
+
+                                       $a->appendChild(new DOMText($entry->getAttribute('src')));
+                                       $a->setAttribute('target', '_blank');
+                                       $a->setAttribute('rel', 'noopener noreferrer');
+
+                                       $p->appendChild($a);
+
+                                       $entry->parentNode->replaceChild($p, $entry);
+                               }
                        }
 
                        if (strtolower($entry->nodeName) == "a") {
                                $entry->setAttribute("target", "_blank");
+                               $entry->setAttribute("rel", "noopener noreferrer");
                        }
                }
 
                        }
                }
 
-               $allowed_elements = array('a', 'address', 'audio', 'article', 'aside',
+               $allowed_elements = array('a', 'address', 'acronym', 'audio', 'article', 'aside',
                        'b', 'bdi', 'bdo', 'big', 'blockquote', 'body', 'br',
                        'caption', 'cite', 'center', 'code', 'col', 'colgroup',
-                       'data', 'dd', 'del', 'details', 'div', 'dl', 'font',
+                       'data', 'dd', 'del', 'details', 'description', 'dfn', 'div', 'dl', 'font',
                        'dt', 'em', 'footer', 'figure', 'figcaption',
                        'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'header', 'html', 'i',
                        'img', 'ins', 'kbd', 'li', 'main', 'mark', 'nav', 'noscript',
                        'ol', 'p', 'pre', 'q', 'ruby', 'rp', 'rt', 's', 'samp', 'section',
                        'small', 'source', 'span', 'strike', 'strong', 'sub', 'summary',
                        'sup', 'table', 'tbody', 'td', 'tfoot', 'th', 'thead', 'time',
-                       'tr', 'track', 'tt', 'u', 'ul', 'var', 'wbr', 'video' );
+                       'tr', 'track', 'tt', 'u', 'ul', 'var', 'wbr', 'video', 'xml:namespace' );
 
                if ($_SESSION['hasSandbox']) $allowed_elements[] = 'iframe';
 
 
                $res = $doc->saveHTML();
 
-               return $res;
+               /* strip everything outside of <body>...</body> */
+
+               $res_frag = array();
+               if (preg_match('/<body>(.*)<\/body>/is', $res, $res_frag)) {
+                       return $res_frag[1];
+               } else {
+                       return $res;
+               }
        }
 
        function strip_harmful_tags($doc, $allowed_elements, $disallowed_attributes) {
                                                array_push($attrs_to_remove, $attr);
                                        }
 
+                                       if ($attr->nodeName == 'href' && stripos($attr->value, 'javascript:') === 0) {
+                                               array_push($attrs_to_remove, $attr);
+                                       }
+
                                        if (in_array($attr->nodeName, $disallowed_attributes)) {
                                                array_push($attrs_to_remove, $attr);
                                        }
                        $result = db_query("SELECT tag_cache FROM ttrss_user_entries
                                WHERE ref_id = '$id' AND owner_uid = $owner_uid");
 
-                       $tag_cache = db_fetch_result($result, 0, "tag_cache");
+                       if (db_num_rows($result) != 0)
+                               $tag_cache = db_fetch_result($result, 0, "tag_cache");
                }
 
                if ($tag_cache) {
 
        function tag_is_valid($tag) {
                if ($tag == '') return false;
-               if (preg_match("/^[0-9]*$/", $tag)) return false;
+               if (is_numeric($tag)) return false;
                if (mb_strlen($tag) > 250) return false;
 
                if (!$tag) return false;
                                        </object>";
                        }
 
-                       if ($entry) $entry .= "&nbsp; <a target=\"_blank\"
+                       if ($entry) $entry .= "&nbsp; <a target=\"_blank\" rel=\"noopener noreferrer\"
                                href=\"$url\">" . basename($url) . "</a>";
 
                        return $entry;
 
 /*             $filename = substr($url, strrpos($url, "/")+1);
 
-               $entry .= " <a target=\"_blank\" href=\"" . htmlspecialchars($url) . "\">" .
+               $entry .= " <a target=\"_blank\" rel=\"noopener noreferrer\" href=\"" . htmlspecialchars($url) . "\">" .
                        $filename . " (" . $ctype . ")" . "</a>"; */
 
        }
                        num_comments,
                        tag_cache,
                        author,
+                       guid,
                        orig_feed_id,
                        note
                        FROM ttrss_entries,ttrss_user_entries
                                $line = $p->hook_render_article($line);
                        }
 
-                       $num_comments = $line["num_comments"];
+                       $num_comments = (int) $line["num_comments"];
                        $entry_comments = "";
 
                        if ($num_comments > 0) {
                                        $comments_url = htmlspecialchars($line["link"]);
                                }
                                $entry_comments = "<a class=\"postComments\"
-                                       target='_blank' href=\"$comments_url\">$num_comments ".
+                                       target='_blank' rel=\"noopener noreferrer\" href=\"$comments_url\">$num_comments ".
                                        _ngettext("comment", "comments", $num_comments)."</a>";
 
                        } else {
                                if ($line["comments"] && $line["link"] != $line["comments"]) {
-                                       $entry_comments = "<a class=\"postComments\" target='_blank' href=\"".htmlspecialchars($line["comments"])."\">".__("comments")."</a>";
+                                       $entry_comments = "<a class=\"postComments\" target='_blank' rel=\"noopener noreferrer\" href=\"".htmlspecialchars($line["comments"])."\">".__("comments")."</a>";
                                }
                        }
 
                                $rv['content'] .= "<div class=\"postDate\">$parsed_updated</div>";
 
                        if ($line["link"]) {
-                               $rv['content'] .= "<div class='postTitle'><a target='_blank'
+                               $rv['content'] .= "<div class='postTitle'><a target='_blank' rel='noopener noreferrer'
                                        title=\"".htmlspecialchars($line['title'])."\"
                                        href=\"" .
                                        htmlspecialchars($line["link"]) . "\">" .
                        }
 
                        if ($zoom_mode) {
-                               $feed_title = "<a href=\"".htmlspecialchars($line["site_url"]).
-                                       "\" target=\"_blank\">".
-                                       htmlspecialchars($line["feed_title"])."</a>";
+                               $feed_title = htmlspecialchars($line["feed_title"]);
 
                                $rv['content'] .= "<div class=\"postFeedTitle\">$feed_title</div>";
 
                        if ($line["orig_feed_id"]) {
 
                                $tmp_result = db_query("SELECT * FROM ttrss_archived_feeds
-                                       WHERE id = ".$line["orig_feed_id"]);
+                                       WHERE id = ".$line["orig_feed_id"] . " AND owner_uid = " . $_SESSION["uid"]);
 
                                if (db_num_rows($tmp_result) != 0) {
 
 
                                        $tmp_line = db_fetch_assoc($tmp_result);
 
-                                       $rv['content'] .= "<a target='_blank'
+                                       $rv['content'] .= "<a target='_blank' rel='noopener noreferrer'
                                                href=' " . htmlspecialchars($tmp_line['site_url']) . "'>" .
                                                $tmp_line['title'] . "</a>";
 
                                        $rv['content'] .= "&nbsp;";
 
-                                       $rv['content'] .= "<a target='_blank' href='" . htmlspecialchars($tmp_line['feed_url']) . "'>";
+                                       $rv['content'] .= "<a target='_blank' rel='noopener noreferrer' href='" . htmlspecialchars($tmp_line['feed_url']) . "'>";
                                        $rv['content'] .= "<img title='".__('Feed URL')."' class='tinyFeedIcon' src='images/pub_set.png'></a>";
 
                                        $rv['content'] .= "</div>";
                        $url .= '/';
                }
 
+               //convert IDNA hostname to punycode if possible
+               if (function_exists("idn_to_ascii")) {
+                       $parts = parse_url($url);
+                       if (mb_detect_encoding($parts['host']) != 'ASCII')
+                       {
+                               $parts['host'] = idn_to_ascii($parts['host']);
+                               $url = build_url($parts);
+                       }
+               }
+
                if ($url != "http:///")
                        return $url;
                else
                                $rv = $retval;
                        }
                }
+               unset($retval); // Unset to prevent breaking render if there are no HOOK_RENDER_ENCLOSURE hooks below.
 
                if ($rv === '' && !empty($result)) {
                        $entries_html = array();
 
                                if (!$ctype) $ctype = __("unknown type");
 
-                               $filename = substr($url, strrpos($url, "/")+1);
+                               //$filename = substr($url, strrpos($url, "/")+1);
+                               $filename = basename($url);
 
                                $player = format_inline_player($url, $ctype);
 
                                if ($player) array_push($entries_inline, $player);
 
-#                              $entry .= " <a target=\"_blank\" href=\"" . htmlspecialchars($url) . "\">" .
+#                              $entry .= " <a target=\"_blank\" href=\"" . htmlspecialchars($url) . "\" rel=\"noopener noreferrer\">" .
 #                                      $filename . " (" . $ctype . ")" . "</a>";
 
-                               $entry = "<div onclick=\"window.open('".htmlspecialchars($url)."')\"
+                               $entry = "<div onclick=\"openUrlPopup('".htmlspecialchars($url)."')\"
                                        dojoType=\"dijit.MenuItem\">$filename ($ctype)</div>";
 
                                array_push($entries_html, $entry);
                                                                        if (!$hide_images) {
                                                                                $encsize = '';
                                                                                if ($entry['height'] > 0)
-                                                                                       $encsize .= ' height="' . intval($entry['width']) . '"';
+                                                                                       $encsize .= ' height="' . intval($entry['height']) . '"';
                                                                                if ($entry['width'] > 0)
-                                                                                       $encsize .= ' width="' . intval($entry['height']) . '"';
+                                                                                       $encsize .= ' width="' . intval($entry['width']) . '"';
                                                                                $rv .= "<p><img
                                                                                alt=\"".htmlspecialchars($entry["filename"])."\"
                                                                                src=\"" .htmlspecialchars($entry["url"]) . "\"
                                                                                " . $encsize . " /></p>";
                                                                        } else {
-                                                                               $rv .= "<p><a target=\"_blank\"
+                                                                               $rv .= "<p><a target=\"_blank\" rel=\"noopener noreferrer\"
                                                                                href=\"".htmlspecialchars($entry["url"])."\"
                                                                                >" .htmlspecialchars($entry["url"]) . "</a></p>";
                                                                        }
 
                        foreach ($entries as $entry) {
                                if ($entry["title"])
-                                       $title = "&mdash; " . truncate_string($entry["title"], 30);
+                                       $title = " &mdash; " . truncate_string($entry["title"], 30);
                                else
                                        $title = "";
 
-                               $rv .= "<div onclick='window.open(\"".htmlspecialchars($entry["url"])."\")'
-                                       dojoType=\"dijit.MenuItem\">".htmlspecialchars($entry["filename"])."$title</div>";
+                               if ($entry["filename"])
+                                       $filename = truncate_middle(htmlspecialchars($entry["filename"]), 60);
+                               else
+                                       $filename = "";
+
+                               $rv .= "<div onclick='openUrlPopup(\"".htmlspecialchars($entry["url"])."\")'
+                                       dojoType=\"dijit.MenuItem\">".$filename . $title."</div>";
 
                        };
 
         * @return string Absolute URL
         */
        function rewrite_relative_url($url, $rel_url) {
-               if (strpos($rel_url, ":") !== false) {
-                       return $rel_url;
-               } else if (strpos($rel_url, "://") !== false) {
+               if (strpos($rel_url, "://") !== false) {
                        return $rel_url;
                } else if (strpos($rel_url, "//") === 0) {
                        # protocol-relative URL (rare but they exist)
                        return $rel_url;
-               } else if (strpos($rel_url, "/") === 0)
-               {
+               } else if (preg_match("/^[a-z]+:/i", $rel_url)) {
+                       # magnet:, feed:, etc
+                       return $rel_url;
+               } else if (strpos($rel_url, "/") === 0) {
                        $parts = parse_url($url);
                        $parts['path'] = $rel_url;
 
                return in_array($interface, class_implements($class));
        }
 
-       function geturl($url, $depth = 0, $nobody = true){
-
-               if ($depth == 20) return $url;
-
-               if (!function_exists('curl_init'))
-                       return user_error('CURL Must be installed for geturl function to work. Ask your host to enable it or uncomment extension=php_curl.dll in php.ini', E_USER_ERROR);
-
-               $curl = curl_init();
-               $header[0] = "Accept: text/xml,application/xml,application/xhtml+xml,";
-               $header[0] .= "text/html;q=0.9,text/plain;q=0.8,image/png,*/*;q=0.5";
-               $header[] = "Cache-Control: max-age=0";
-               $header[] = "Connection: keep-alive";
-               $header[] = "Keep-Alive: 300";
-               $header[] = "Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7";
-               $header[] = "Accept-Language: en-us,en;q=0.5";
-               $header[] = "Pragma: ";
-
-               curl_setopt($curl, CURLOPT_URL, $url);
-               curl_setopt($curl, CURLOPT_USERAGENT, 'Mozilla/5.0 (Windows NT 5.1; rv:5.0) Gecko/20100101 Firefox/5.0 Firefox/5.0');
-               curl_setopt($curl, CURLOPT_HTTPHEADER, $header);
-               curl_setopt($curl, CURLOPT_HEADER, true);
-               curl_setopt($curl, CURLOPT_NOBODY, $nobody);
-               curl_setopt($curl, CURLOPT_REFERER, $url);
-               curl_setopt($curl, CURLOPT_ENCODING, 'gzip,deflate');
-               curl_setopt($curl, CURLOPT_AUTOREFERER, true);
-               curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
-               //curl_setopt($curl, CURLOPT_FOLLOWLOCATION, true); //CURLOPT_FOLLOWLOCATION Disabled...
-               curl_setopt($curl, CURLOPT_TIMEOUT, 60);
-               curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);
-
-               if (defined('_CURL_HTTP_PROXY')) {
-                       curl_setopt($curl, CURLOPT_PROXY, _CURL_HTTP_PROXY);
-               }
-
-               $html = curl_exec($curl);
-
-               $status = curl_getinfo($curl);
-
-               if($status['http_code']!=200){
-
-                       // idiot site not allowing http head
-                       if($status['http_code'] == 405) {
-                               curl_close($curl);
-                               return geturl($url, $depth +1, false);
-                       }
-
-                       if($status['http_code'] == 301 || $status['http_code'] == 302) {
-                               curl_close($curl);
-                               list($header) = explode("\r\n\r\n", $html, 2);
-                               $matches = array();
-                               preg_match("/(Location:|URI:)[^(\n)]*/", $header, $matches);
-                               $url = trim(str_replace($matches[1],"",$matches[0]));
-                               $url_parsed = parse_url($url);
-                               return (isset($url_parsed))? geturl($url, $depth + 1):'';
-                       }
-
-                       global $fetch_last_error;
-
-                       $fetch_last_error = curl_errno($curl) . " " . curl_error($curl);
-                       curl_close($curl);
-
-#                      $oline='';
-#                      foreach($status as $key=>$eline){$oline.='['.$key.']'.$eline.' ';}
-#                      $line =$oline." \r\n ".$url."\r\n-----------------\r\n";
-#                      $handle = @fopen('./curl.error.log', 'a');
-#                      fwrite($handle, $line);
-                       return FALSE;
-               }
-               curl_close($curl);
-               return $url;
-       }
-
        function get_minified_js($files) {
                require_once 'lib/jshrink/Minifier.php';
 
        }
 
        function theme_valid($theme) {
-               if ($theme == "default.css" || $theme == "night.css") return true; // needed for array_filter
+               $bundled_themes = [ "default.php", "night.css", "compact.css" ];
+               
+               if (in_array($theme, $bundled_themes)) return true;
+
                $file = "themes/" . basename($theme);
 
                if (!file_exists($file)) $file = "themes.local/" . basename($theme);
 
                return $tmp;
        }
+
+       function get_upload_error_message($code) {
+
+               $errors = array(
+                       0 => __('There is no error, the file uploaded with success'),
+                       1 => __('The uploaded file exceeds the upload_max_filesize directive in php.ini'),
+                       2 => __('The uploaded file exceeds the MAX_FILE_SIZE directive that was specified in the HTML form'),
+                       3 => __('The uploaded file was only partially uploaded'),
+                       4 => __('No file was uploaded'),
+                       6 => __('Missing a temporary folder'),
+                       7 => __('Failed to write file to disk.'),
+                       8 => __('A PHP extension stopped the file upload.'),
+               );
+
+               return $errors[$code];
+       }
+
+       function base64_img($filename) {
+               if (file_exists($filename)) {
+                        $ext = pathinfo($filename, PATHINFO_EXTENSION);
+
+                       return "data:image/$ext;base64," . base64_encode(file_get_contents($filename));
+               } else {
+                       return "";
+               }
+       }
 ?>