*/ private array $mimeMap = [ 'video/3gpp2' => '3g2', 'video/3gp' => '3gp', 'video/3gpp' => '3gp', 'application/x-compressed' => '7zip', 'audio/x-acc' => 'aac', 'audio/ac3' => 'ac3', 'application/postscript' => 'ai', 'audio/x-aiff' => 'aif', 'audio/aiff' => 'aif', 'audio/x-au' => 'au', 'video/x-msvideo' => 'avi', 'video/msvideo' => 'avi', 'video/avi' => 'avi', 'application/x-troff-msvideo' => 'avi', 'application/macbinary' => 'bin', 'application/mac-binary' => 'bin', 'application/x-binary' => 'bin', 'application/x-macbinary' => 'bin', 'image/bmp' => 'bmp', 'image/x-bmp' => 'bmp', 'image/x-bitmap' => 'bmp', 'image/x-xbitmap' => 'bmp', 'image/x-win-bitmap' => 'bmp', 'image/x-windows-bmp' => 'bmp', 'image/ms-bmp' => 'bmp', 'image/x-ms-bmp' => 'bmp', 'application/bmp' => 'bmp', 'application/x-bmp' => 'bmp', 'application/x-win-bitmap' => 'bmp', 'application/cdr' => 'cdr', 'application/coreldraw' => 'cdr', 'application/x-cdr' => 'cdr', 'application/x-coreldraw' => 'cdr', 'image/cdr' => 'cdr', 'image/x-cdr' => 'cdr', 'zz-application/zz-winassoc-cdr' => 'cdr', 'application/mac-compactpro' => 'cpt', 'application/pkix-crl' => 'crl', 'application/pkcs-crl' => 'crl', 'application/x-x509-ca-cert' => 'crt', 'application/pkix-cert' => 'crt', 'text/css' => 'css', 'text/x-comma-separated-values' => 'csv', 'text/comma-separated-values' => 'csv', 'application/vnd.msexcel' => 'csv', 'application/x-director' => 'dcr', 'application/vnd.openxmlformats-officedocument.wordprocessingml.document' => 'docx', 'application/x-dvi' => 'dvi', 'message/rfc822' => 'eml', 'application/x-msdownload' => 'exe', 'video/x-f4v' => 'f4v', 'audio/x-flac' => 'flac', 'video/x-flv' => 'flv', 'image/gif' => 'gif', 'application/gpg-keys' => 'gpg', 'application/x-gtar' => 'gtar', 'application/x-gzip' => 'gzip', 'application/mac-binhex40' => 'hqx', 'application/mac-binhex' => 'hqx', 'application/x-binhex40' => 'hqx', 'application/x-mac-binhex40' => 'hqx', 'text/html' => 'html', 'image/x-icon' => 'ico', 'image/x-ico' => 'ico', 'image/vnd.microsoft.icon' => 'ico', 'text/calendar' => 'ics', 'application/java-archive' => 'jar', 'application/x-java-application' => 'jar', 'application/x-jar' => 'jar', 'image/jp2' => 'jp2', 'video/mj2' => 'jp2', 'image/jpx' => 'jp2', 'image/jpm' => 'jp2', 'image/jpeg' => 'jpg', 'image/pjpeg' => 'jpg', 'application/x-javascript' => 'js', 'application/json' => 'json', 'text/json' => 'json', 'application/vnd.google-earth.kml+xml' => 'kml', 'application/vnd.google-earth.kmz' => 'kmz', 'text/x-log' => 'log', 'audio/x-m4a' => 'm4a', 'audio/mp4' => 'm4a', 'application/vnd.mpegurl' => 'm4u', 'audio/midi' => 'mid', 'application/vnd.mif' => 'mif', 'video/quicktime' => 'mov', 'video/x-sgi-movie' => 'movie', 'audio/mpeg' => 'mp3', 'audio/mpg' => 'mp3', 'audio/mpeg3' => 'mp3', 'audio/mp3' => 'mp3', 'video/mp4' => 'mp4', 'video/mpeg' => 'mpeg', 'application/oda' => 'oda', 'audio/ogg' => 'ogg', 'video/ogg' => 'ogg', 'application/ogg' => 'ogg', 'font/otf' => 'otf', 'application/x-pkcs10' => 'p10', 'application/pkcs10' => 'p10', 'application/x-pkcs12' => 'p12', 'application/x-pkcs7-signature' => 'p7a', 'application/pkcs7-mime' => 'p7c', 'application/x-pkcs7-mime' => 'p7c', 'application/x-pkcs7-certreqresp' => 'p7r', 'application/pkcs7-signature' => 'p7s', 'application/pdf' => 'pdf', 'application/octet-stream' => 'pdf', 'application/x-x509-user-cert' => 'pem', 'application/x-pem-file' => 'pem', 'application/pgp' => 'pgp', 'application/x-httpd-php' => 'php', 'application/php' => 'php', 'application/x-php' => 'php', 'text/php' => 'php', 'text/x-php' => 'php', 'application/x-httpd-php-source' => 'php', 'image/png' => 'png', 'image/x-png' => 'png', 'application/powerpoint' => 'ppt', 'application/vnd.ms-powerpoint' => 'ppt', 'application/vnd.ms-office' => 'ppt', 'application/msword' => 'ppt', 'application/vnd.openxmlformats-officedocument.presentationml.presentation' => 'pptx', 'application/x-photoshop' => 'psd', 'image/vnd.adobe.photoshop' => 'psd', 'audio/x-realaudio' => 'ra', 'audio/x-pn-realaudio' => 'ram', 'application/x-rar' => 'rar', 'application/rar' => 'rar', 'application/x-rar-compressed' => 'rar', 'audio/x-pn-realaudio-plugin' => 'rpm', 'application/x-pkcs7' => 'rsa', 'text/rtf' => 'rtf', 'text/richtext' => 'rtx', 'video/vnd.rn-realvideo' => 'rv', 'application/x-stuffit' => 'sit', 'application/smil' => 'smil', 'text/srt' => 'srt', 'image/svg+xml' => 'svg', 'application/x-shockwave-flash' => 'swf', 'application/x-tar' => 'tar', 'application/x-gzip-compressed' => 'tgz', 'image/tiff' => 'tiff', 'font/ttf' => 'ttf', 'text/plain' => 'txt', 'text/x-vcard' => 'vcf', 'application/videolan' => 'vlc', 'text/vtt' => 'vtt', 'audio/x-wav' => 'wav', 'audio/wave' => 'wav', 'audio/wav' => 'wav', 'application/wbxml' => 'wbxml', 'video/webm' => 'webm', 'image/webp' => 'webp', 'audio/x-ms-wma' => 'wma', 'application/wmlc' => 'wmlc', 'video/x-ms-wmv' => 'wmv', 'video/x-ms-asf' => 'wmv', 'font/woff' => 'woff', 'font/woff2' => 'woff2', 'application/xhtml+xml' => 'xhtml', 'application/excel' => 'xl', 'application/msexcel' => 'xls', 'application/x-msexcel' => 'xls', 'application/x-ms-excel' => 'xls', 'application/x-excel' => 'xls', 'application/x-dos_ms_excel' => 'xls', 'application/xls' => 'xls', 'application/x-xls' => 'xls', 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet' => 'xlsx', 'application/vnd.ms-excel' => 'xlsx', 'application/xml' => 'xml', 'text/xml' => 'xml', 'text/xsl' => 'xsl', 'application/xspf+xml' => 'xspf', 'application/x-compress' => 'z', 'application/x-zip' => 'zip', 'application/zip' => 'zip', 'application/x-zip-compressed' => 'zip', 'application/s-compressed' => 'zip', 'multipart/x-zip' => 'zip', 'text/x-scriptzsh' => 'zsh' ]; public static function instance(string $dir) : DiskCache { if ((self::$instances[$dir] ?? null) == null) self::$instances[$dir] = new self($dir); return self::$instances[$dir]; } public function __construct(string $dir) { foreach (PluginHost::getInstance()->get_plugins() as $n => $p) { if (implements_interface($p, "Cache_Adapter")) { /** @var Cache_Adapter $p */ $this->adapter = clone $p; // we need separate object instances for separate directories $this->adapter->set_dir($dir); return; } } $this->adapter = new Cache_Local(); $this->adapter->set_dir($dir); } public function remove(string $filename): bool { return $this->adapter->remove($filename); } public function set_dir(string $dir) : void { $this->adapter->set_dir($dir); } /** * @return int|false -1 if the file doesn't exist, false if an error occurred, timestamp otherwise */ public function get_mtime(string $filename) { return $this->adapter->get_mtime(basename($filename)); } public function make_dir(): bool { return $this->adapter->make_dir(); } public function is_writable(?string $filename = null): bool { return $this->adapter->is_writable(basename($filename)); } public function exists(string $filename): bool { return $this->adapter->exists(basename($filename)); } /** * @return int|false -1 if the file doesn't exist, false if an error occurred, size in bytes otherwise */ public function get_size(string $filename) { return $this->adapter->get_size(basename($filename)); } /** * @param mixed $data * * @return int|false Bytes written or false if an error occurred. */ public function put(string $filename, $data) { return $this->adapter->put(basename($filename), $data); } /** @deprecated we can't assume cached files are local, and other storages * might not support this operation (object metadata may be immutable) */ public function touch(string $filename): bool { user_error("DiskCache: called unsupported method touch() for $filename", E_USER_DEPRECATED); return false; } public function get(string $filename): ?string { return $this->adapter->get(basename($filename)); } public function expire_all(): void { $this->adapter->expire_all(); } public function get_dir(): string { return $this->adapter->get_dir(); } /** Downloads $url to cache as $local_filename if its missing (unless $force-ed) * @param string $url * @param string $local_filename * @param array $options (additional params to UrlHelper::fetch()) * @param bool $force * @return bool */ public function download(string $url, string $local_filename, array $options = [], bool $force = false) : bool { if ($this->exists($local_filename) && !$force) return true; $data = UrlHelper::fetch(array_merge(["url" => $url, "max_size" => Config::get(Config::MAX_CACHE_FILE_SIZE)], $options)); if ($data) return $this->put($local_filename, $data) > 0; return false; } public function send(string $filename) { $filename = basename($filename); if (!$this->exists($filename)) { header($_SERVER["SERVER_PROTOCOL"]." 404 Not Found"); echo "File not found."; return false; } $file_mtime = $this->get_mtime($filename); $gmt_modified = gmdate("D, d M Y H:i:s", (int)$file_mtime) . " GMT"; if (($_SERVER['HTTP_IF_MODIFIED_SINCE'] ?? '') == $gmt_modified || ($_SERVER['HTTP_IF_NONE_MATCH'] ?? '') == $file_mtime) { header('HTTP/1.1 304 Not Modified'); return false; } $mimetype = $this->get_mime_type($filename); if ($mimetype == "application/octet-stream") $mimetype = "video/mp4"; # block SVG because of possible embedded javascript (.....) $mimetype_blacklist = [ "image/svg+xml" ]; /* only serve video and images */ if (!preg_match("/(image|audio|video)\//", (string)$mimetype) || in_array($mimetype, $mimetype_blacklist)) { http_response_code(400); header("Content-type: text/plain"); print "Stored file has disallowed content type ($mimetype)"; return false; } $fake_extension = $this->get_fake_extension($filename); if ($fake_extension) $fake_extension = ".$fake_extension"; header("Content-Disposition: inline; filename=\"{$filename}{$fake_extension}\""); header("Content-type: $mimetype"); $stamp_expires = gmdate("D, d M Y H:i:s", (int)$this->get_mtime($filename) + 86400 * Config::get(Config::CACHE_MAX_DAYS)) . " GMT"; header("Expires: $stamp_expires", true); header("Last-Modified: $gmt_modified", true); header("Cache-Control: no-cache"); header("ETag: $file_mtime"); header_remove("Pragma"); return $this->adapter->send($filename); } public function get_full_path(string $filename): string { return $this->adapter->get_full_path(basename($filename)); } public function get_mime_type(string $filename) { return $this->adapter->get_mime_type(basename($filename)); } public function get_fake_extension(string $filename): string { $mimetype = $this->adapter->get_mime_type(basename($filename)); if ($mimetype) return isset($this->mimeMap[$mimetype]) ? $this->mimeMap[$mimetype] : ""; else return ""; } public function get_url(string $filename): string { return Config::get_self_url() . "/public.php?op=cached&file=" . basename($this->adapter->get_dir()) . "/" . basename($filename); } // check for locally cached (media) URLs and rewrite to local versions // this is called separately after sanitize() and plugin render article hooks to allow // plugins work on original source URLs used before caching // NOTE: URLs should be already absolutized because this is called after sanitize() static public function rewrite_urls(string $str): string { $res = trim($str); if (!$res) return ''; $doc = new DOMDocument(); if (@$doc->loadHTML('' . $res)) { $xpath = new DOMXPath($doc); $cache = DiskCache::instance("images"); $entries = $xpath->query('(//img[@src]|//source[@src|@srcset]|//video[@poster|@src])'); $need_saving = false; foreach ($entries as $entry) { foreach (array('src', 'poster') as $attr) { if ($entry->hasAttribute($attr)) { $url = $entry->getAttribute($attr); $cached_filename = sha1($url); if ($cache->exists($cached_filename)) { $url = $cache->get_url($cached_filename); $entry->setAttribute($attr, $url); $entry->removeAttribute("srcset"); $need_saving = true; } } } if ($entry->hasAttribute("srcset")) { $matches = RSSUtils::decode_srcset($entry->getAttribute('srcset')); for ($i = 0; $i < count($matches); $i++) { $cached_filename = sha1($matches[$i]["url"]); if ($cache->exists($cached_filename)) { $matches[$i]["url"] = $cache->get_url($cached_filename); $need_saving = true; } } $entry->setAttribute("srcset", RSSUtils::encode_srcset($matches)); } } if ($need_saving) { if (isset($doc->firstChild)) $doc->removeChild($doc->firstChild); //remove doctype $res = $doc->saveHTML(); } } return $res; } }