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<?php
class Config {
private const _ENVVAR_PREFIX = "TTRSS_";
const T_BOOL = 1;
const T_STRING = 2;
const T_INT = 3;
// override defaults, defined below in _DEFAULTS[], via environment: DB_TYPE becomes TTRSS_DB_TYPE, etc
const DB_TYPE = "DB_TYPE";
const DB_HOST = "DB_HOST";
const DB_USER = "DB_USER";
const DB_NAME = "DB_NAME";
const DB_PASS = "DB_PASS";
const DB_PORT = "DB_PORT";
const MYSQL_CHARSET = "MYSQL_CHARSET";
const SELF_URL_PATH = "SELF_URL_PATH";
const SINGLE_USER_MODE = "SINGLE_USER_MODE";
const SIMPLE_UPDATE_MODE = "SIMPLE_UPDATE_MODE";
const PHP_EXECUTABLE = "PHP_EXECUTABLE";
const LOCK_DIRECTORY = "LOCK_DIRECTORY";
const CACHE_DIR = "CACHE_DIR";
const ICONS_DIR = "ICONS_DIR";
const ICONS_URL = "ICONS_URL";
const AUTH_AUTO_CREATE = "AUTH_AUTO_CREATE";
const AUTH_AUTO_LOGIN = "AUTH_AUTO_LOGIN";
const FORCE_ARTICLE_PURGE = "FORCE_ARTICLE_PURGE";
const SESSION_COOKIE_LIFETIME = "SESSION_COOKIE_LIFETIME";
const SMTP_FROM_NAME = "SMTP_FROM_NAME";
const SMTP_FROM_ADDRESS = "SMTP_FROM_ADDRESS";
const DIGEST_SUBJECT = "DIGEST_SUBJECT";
const CHECK_FOR_UPDATES = "CHECK_FOR_UPDATES";
const PLUGINS = "PLUGINS";
const LOG_DESTINATION = "LOG_DESTINATION";
const LOCAL_OVERRIDE_STYLESHEET = "LOCAL_OVERRIDE_STYLESHEET";
const DAEMON_MAX_CHILD_RUNTIME = "DAEMON_MAX_CHILD_RUNTIME";
const DAEMON_MAX_JOBS = "DAEMON_MAX_JOBS";
const FEED_FETCH_TIMEOUT = "FEED_FETCH_TIMEOUT";
const FEED_FETCH_NO_CACHE_TIMEOUT = "FEED_FETCH_NO_CACHE_TIMEOUT";
const FILE_FETCH_TIMEOUT = "FILE_FETCH_TIMEOUT";
const FILE_FETCH_CONNECT_TIMEOUT = "FILE_FETCH_CONNECT_TIMEOUT";
const DAEMON_UPDATE_LOGIN_LIMIT = "DAEMON_UPDATE_LOGIN_LIMIT";
const DAEMON_FEED_LIMIT = "DAEMON_FEED_LIMIT";
const DAEMON_SLEEP_INTERVAL = "DAEMON_SLEEP_INTERVAL";
const MAX_CACHE_FILE_SIZE = "MAX_CACHE_FILE_SIZE";
const MAX_DOWNLOAD_FILE_SIZE = "MAX_DOWNLOAD_FILE_SIZE";
const MAX_FAVICON_FILE_SIZE = "MAX_FAVICON_FILE_SIZE";
const CACHE_MAX_DAYS = "CACHE_MAX_DAYS";
const MAX_CONDITIONAL_INTERVAL = "MAX_CONDITIONAL_INTERVAL";
const DAEMON_UNSUCCESSFUL_DAYS_LIMIT = "DAEMON_UNSUCCESSFUL_DAYS_LIMIT";
const LOG_SENT_MAIL = "LOG_SENT_MAIL";
const HTTP_PROXY = "HTTP_PROXY";
const FORBID_PASSWORD_CHANGES = "FORBID_PASSWORD_CHANGES";
const SESSION_NAME = "SESSION_NAME";
private const _DEFAULTS = [
Config::DB_TYPE => [ "pgsql", Config::T_STRING ],
Config::DB_HOST => [ "db", Config::T_STRING ],
Config::DB_USER => [ "", Config::T_STRING ],
Config::DB_NAME => [ "", Config::T_STRING ],
Config::DB_PASS => [ "", Config::T_STRING ],
Config::DB_PORT => [ "5432", Config::T_STRING ],
Config::MYSQL_CHARSET => [ "UTF8", Config::T_STRING ],
Config::SELF_URL_PATH => [ "", Config::T_STRING ],
Config::SINGLE_USER_MODE => [ "", Config::T_BOOL ],
Config::SIMPLE_UPDATE_MODE => [ "", Config::T_BOOL ],
Config::PHP_EXECUTABLE => [ "/usr/bin/php", Config::T_STRING ],
Config::LOCK_DIRECTORY => [ "lock", Config::T_STRING ],
Config::CACHE_DIR => [ "cache", Config::T_STRING ],
Config::ICONS_DIR => [ "feed-icons", Config::T_STRING ],
Config::ICONS_URL => [ "feed-icons", Config::T_STRING ],
Config::AUTH_AUTO_CREATE => [ "true", Config::T_BOOL ],
Config::AUTH_AUTO_LOGIN => [ "true", Config::T_BOOL ],
Config::FORCE_ARTICLE_PURGE => [ 0, Config::T_INT ],
Config::SESSION_COOKIE_LIFETIME => [ 86400, Config::T_INT ],
Config::SMTP_FROM_NAME => [ "Tiny Tiny RSS", Config::T_STRING ],
Config::SMTP_FROM_ADDRESS => [ "noreply@localhost", Config::T_STRING ],
Config::DIGEST_SUBJECT => [ "[tt-rss] New headlines for last 24 hours",
Config::T_STRING ],
Config::CHECK_FOR_UPDATES => [ "true", Config::T_BOOL ],
Config::PLUGINS => [ "auth_internal", Config::T_STRING ],
Config::LOG_DESTINATION => [ "sql", Config::T_STRING ],
Config::LOCAL_OVERRIDE_STYLESHEET => [ "local-overrides.css",
Config::T_STRING ],
Config::DAEMON_MAX_CHILD_RUNTIME => [ 1800, Config::T_STRING ],
Config::DAEMON_MAX_JOBS => [ 2, Config::T_INT ],
Config::FEED_FETCH_TIMEOUT => [ 45, Config::T_INT ],
Config::FEED_FETCH_NO_CACHE_TIMEOUT => [ 15, Config::T_INT ],
Config::FILE_FETCH_TIMEOUT => [ 45, Config::T_INT ],
Config::FILE_FETCH_CONNECT_TIMEOUT => [ 15, Config::T_INT ],
Config::DAEMON_UPDATE_LOGIN_LIMIT => [ 30, Config::T_INT ],
Config::DAEMON_FEED_LIMIT => [ 500, Config::T_INT ],
Config::DAEMON_SLEEP_INTERVAL => [ 120, Config::T_INT ],
Config::MAX_CACHE_FILE_SIZE => [ 64*1024*1024, Config::T_INT ],
Config::MAX_DOWNLOAD_FILE_SIZE => [ 16*1024*1024, Config::T_INT ],
Config::MAX_FAVICON_FILE_SIZE => [ 1*1024*1024, Config::T_INT ],
Config::CACHE_MAX_DAYS => [ 7, Config::T_INT ],
Config::MAX_CONDITIONAL_INTERVAL => [ 3600*12, Config::T_INT ],
Config::DAEMON_UNSUCCESSFUL_DAYS_LIMIT => [ 30, Config::T_INT ],
Config::LOG_SENT_MAIL => [ "", Config::T_BOOL ],
Config::HTTP_PROXY => [ "", Config::T_STRING ],
Config::FORBID_PASSWORD_CHANGES => [ "", Config::T_BOOL ],
Config::SESSION_NAME => [ "ttrss_sid", Config::T_STRING ],
];
private static $instance;
private $params = [];
private $schema_version = null;
private $version = [];
public static function get_instance() : Config {
if (self::$instance == null)
self::$instance = new self();
return self::$instance;
}
private function __clone() {
//
}
function __construct() {
$ref = new ReflectionClass(get_class($this));
foreach ($ref->getConstants() as $const => $cvalue) {
if (isset($this::_DEFAULTS[$const])) {
$override = getenv($this::_ENVVAR_PREFIX . $const);
list ($defval, $deftype) = $this::_DEFAULTS[$const];
$this->params[$cvalue] = [ self::cast_to(!empty($override) ? $override : $defval, $deftype), $deftype ];
}
}
}
/* package maintainers who don't use git: if version_static.txt exists in tt-rss root
directory, its contents are displayed instead of git commit-based version, this could be generated
based on source git tree commit used when creating the package */
static function get_version(bool $as_string = true) {
return self::get_instance()->_get_version($as_string);
}
private function _get_version(bool $as_string = true) {
$root_dir = dirname(__DIR__);
if (empty($this->version)) {
$this->version["status"] = -1;
if (PHP_OS === "Darwin") {
$ttrss_version["version"] = "UNKNOWN (Unsupported, Darwin)";
} else if (file_exists("$root_dir/version_static.txt")) {
$this->version["version"] = trim(file_get_contents("$root_dir/version_static.txt")) . " (Unsupported)";
} else if (is_dir("$root_dir/.git")) {
$this->version = self::get_version_from_git($root_dir);
if ($this->version["status"] != 0) {
user_error("Unable to determine version: " . $this->version["version"], E_USER_WARNING);
$this->version["version"] = "UNKNOWN (Unsupported, Git error)";
}
} else {
$this->version["version"] = "UNKNOWN (Unsupported)";
}
}
return $as_string ? $this->version["version"] : $this->version;
}
static function get_version_from_git(string $dir) {
$descriptorspec = [
1 => ["pipe", "w"], // STDOUT
2 => ["pipe", "w"], // STDERR
];
$rv = [
"status" => -1,
"version" => "",
"commit" => "",
"timestamp" => 0,
];
$proc = proc_open("git --no-pager log --pretty=\"%ct %h\" -n1 HEAD",
$descriptorspec, $pipes, $dir);
if (is_resource($proc)) {
$stdout = trim(stream_get_contents($pipes[1]));
$stderr = trim(stream_get_contents($pipes[2]));
$status = proc_close($proc);
$rv["status"] = $status;
if ($status == 0) {
list($timestamp, $commit) = explode(" ", $stdout);
$rv["version"] = strftime("%y.%m", (int)$timestamp) . "-$commit";
$rv["commit"] = $commit;
$rv["timestamp"] = $timestamp;
} else {
$rv["version"] = T_sprintf("Git error [RC=%d]: %s", $status, $stderr);
}
}
return $rv;
}
static function get_schema_version(bool $nocache = false) {
return self::get_instance()->_schema_version($nocache);
}
function _schema_version(bool $nocache = false) {
if (empty($this->schema_version) || $nocache) {
$row = Db::pdo()->query("SELECT schema_version FROM ttrss_version")->fetch();
$this->schema_version = (int) $row["schema_version"];
}
return $this->schema_version;
}
static function cast_to(string $value, int $type_hint) {
switch ($type_hint) {
case self::T_BOOL:
return sql_bool_to_bool($value);
case self::T_INT:
return (int) $value;
default:
return $value;
}
}
private function _get(string $param) {
list ($value, $type_hint) = $this->params[$param];
return $this->cast_to($value, $type_hint);
}
private function _add(string $param, string $default, int $type_hint) {
$override = getenv($this::_ENVVAR_PREFIX . $param);
$this->params[$param] = [ self::cast_to(!empty($override) ? $override : $default, $type_hint), $type_hint ];
}
static function add(string $param, string $default, int $type_hint = Config::T_STRING) {
$instance = self::get_instance();
return $instance->_add($param, $default, $type_hint);
}
static function get(string $param) {
$instance = self::get_instance();
return $instance->_get($param);
}
// this returns Config::SELF_URL_PATH sans ending slash
static function get_self_url() {
$self_url_path = self::get(Config::SELF_URL_PATH);
if (substr($self_url_path, -1) === "/") {
return substr($self_url_path, 0, -1);
} else {
return $self_url_path;
}
}
static function is_server_https() {
return (!empty($_SERVER['HTTPS']) && ($_SERVER['HTTPS'] != 'off')) ||
(!empty($_SERVER['HTTP_X_FORWARDED_PROTO']) && $_SERVER['HTTP_X_FORWARDED_PROTO'] == 'https');
}
static function make_self_url() {
$proto = self::is_server_https() ? 'https' : 'http';
return $proto . '://' . $_SERVER["HTTP_HOST"] . $_SERVER["REQUEST_URI"];
}
/* sanity check stuff */
private static function make_self_url_path() {
if (!isset($_SERVER["HTTP_HOST"])) return false;
$proto = self::is_server_https() ? 'https' : 'http';
$url_path = $proto . '://' . $_SERVER["HTTP_HOST"] . parse_url($_SERVER["REQUEST_URI"], PHP_URL_PATH);
return $url_path;
}
private static function check_mysql_tables() {
$pdo = Db::pdo();
$sth = $pdo->prepare("SELECT engine, table_name FROM information_schema.tables WHERE
table_schema = ? AND table_name LIKE 'ttrss_%' AND engine != 'InnoDB'");
$sth->execute([self::get(Config::DB_NAME)]);
$bad_tables = [];
while ($line = $sth->fetch()) {
array_push($bad_tables, $line);
}
return $bad_tables;
}
static function sanity_check() {
$errors = array();
if (strpos(self::get(Config::PLUGINS), "auth_") === false) {
array_push($errors, "Please enable at least one authentication module via PLUGINS");
}
if (function_exists('posix_getuid') && posix_getuid() == 0) {
array_push($errors, "Please don't run this script as root.");
}
if (version_compare(PHP_VERSION, '7.1.0', '<')) {
array_push($errors, "PHP version 7.1.0 or newer required. You're using " . PHP_VERSION . ".");
}
if (!class_exists("UConverter")) {
array_push($errors, "PHP UConverter class is missing, it's provided by the Internationalization (intl) module.");
}
if (!is_writable(self::get(Config::CACHE_DIR) . "/images")) {
array_push($errors, "Image cache is not writable (chmod -R 777 ".self::get(Config::CACHE_DIR)."/images)");
}
if (!is_writable(self::get(Config::CACHE_DIR) . "/upload")) {
array_push($errors, "Upload cache is not writable (chmod -R 777 ".self::get(Config::CACHE_DIR)."/upload)");
}
if (!is_writable(self::get(Config::CACHE_DIR) . "/export")) {
array_push($errors, "Data export cache is not writable (chmod -R 777 ".self::get(Config::CACHE_DIR)."/export)");
}
if (self::get(Config::SINGLE_USER_MODE) && class_exists("PDO")) {
if (UserHelper::get_login_by_id(1) != "admin") {
array_push($errors, "SINGLE_USER_MODE is enabled but default admin account (ID: 1) is not found.");
}
}
if (php_sapi_name() != "cli") {
$ref_self_url_path = self::make_self_url_path();
if ($ref_self_url_path) {
$ref_self_url_path = preg_replace("/\w+\.php$/", "", $ref_self_url_path);
}
if (self::get(Config::SELF_URL_PATH) == "http://example.org/tt-rss/") {
$hint = $ref_self_url_path ? "(possible value: <b>$ref_self_url_path</b>)" : "";
array_push($errors,
"Please set SELF_URL_PATH to the correct value for your server: $hint");
}
if ($ref_self_url_path &&
(!defined('_SKIP_SELF_URL_PATH_CHECKS') || !_SKIP_SELF_URL_PATH_CHECKS) &&
self::get(Config::SELF_URL_PATH) != $ref_self_url_path && self::get(Config::SELF_URL_PATH) != mb_substr($ref_self_url_path, 0, mb_strlen($ref_self_url_path)-1)) {
array_push($errors,
"Please set SELF_URL_PATH to the correct value detected for your server: <b>$ref_self_url_path</b> (you're using: <b>" . self::get(Config::SELF_URL_PATH) . "</b>)");
}
}
if (!is_writable(self::get(Config::ICONS_DIR))) {
array_push($errors, "ICONS_DIR defined in config.php is not writable (chmod -R 777 ".self::get(Config::ICONS_DIR).").\n");
}
if (!is_writable(self::get(Config::LOCK_DIRECTORY))) {
array_push($errors, "LOCK_DIRECTORY is not writable (chmod -R 777 ".self::get(Config::LOCK_DIRECTORY).").\n");
}
if (!function_exists("curl_init") && !ini_get("allow_url_fopen")) {
array_push($errors, "PHP configuration option allow_url_fopen is disabled, and CURL functions are not present. Either enable allow_url_fopen or install PHP extension for CURL.");
}
if (!function_exists("json_encode")) {
array_push($errors, "PHP support for JSON is required, but was not found.");
}
if (!class_exists("PDO")) {
array_push($errors, "PHP support for PDO is required but was not found.");
}
if (!function_exists("mb_strlen")) {
array_push($errors, "PHP support for mbstring functions is required but was not found.");
}
if (!function_exists("hash")) {
array_push($errors, "PHP support for hash() function is required but was not found.");
}
if (ini_get("safe_mode")) {
array_push($errors, "PHP safe mode setting is obsolete and not supported by tt-rss.");
}
if (!function_exists("mime_content_type")) {
array_push($errors, "PHP function mime_content_type() is missing, try enabling fileinfo module.");
}
if (!class_exists("DOMDocument")) {
array_push($errors, "PHP support for DOMDocument is required, but was not found.");
}
if (self::get(Config::DB_TYPE) == "mysql") {
$bad_tables = self::check_mysql_tables();
if (count($bad_tables) > 0) {
$bad_tables_fmt = [];
foreach ($bad_tables as $bt) {
array_push($bad_tables_fmt, sprintf("%s (%s)", $bt['table_name'], $bt['engine']));
}
$msg = "<p>The following tables use an unsupported MySQL engine: <b>" .
implode(", ", $bad_tables_fmt) . "</b>.</p>";
$msg .= "<p>The only supported engine on MySQL is InnoDB. MyISAM lacks functionality to run
tt-rss.
Please backup your data (via OPML) and re-import the schema before continuing.</p>
<p><b>WARNING: importing the schema would mean LOSS OF ALL YOUR DATA.</b></p>";
array_push($errors, $msg);
}
}
if (count($errors) > 0 && php_sapi_name() != "cli") { ?>
<!DOCTYPE html>
<html>
<head>
<title>Startup failed</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<link rel="stylesheet" type="text/css" href="themes/light.css">
</head>
<body class="sanity_failed flat ttrss_utility">
<div class="content">
<h1>Startup failed</h1>
<p>Please fix errors indicated by the following messages:</p>
<?php foreach ($errors as $error) { echo self::format_error($error); } ?>
<p>You might want to check tt-rss <a target="_blank" href="https://tt-rss.org/wiki.php">wiki</a> or the
<a target="_blank" href="https://community.tt-rss.org/">forums</a> for more information. Please search the forums before creating new topic
for your question.</p>
</div>
</body>
</html>
<?php
die;
} else if (count($errors) > 0) {
echo "Please fix errors indicated by the following messages:\n\n";
foreach ($errors as $error) {
echo " * " . strip_tags($error)."\n";
}
echo "\nYou might want to check tt-rss wiki or the forums for more information.\n";
echo "Please search the forums before creating new topic for your question.\n";
exit(1);
}
}
private static function format_error($msg) {
return "<div class=\"alert alert-danger\">$msg</div>";
}
}