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tt-rss/include/functions.php

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<?php
define('EXPECTED_CONFIG_VERSION', 26);
define('SCHEMA_VERSION', 131);
define('LABEL_BASE_INDEX', -1024);
define('PLUGIN_FEED_BASE_INDEX', -128);
define('COOKIE_LIFETIME_LONG', 86400*365);
$fetch_last_error = false;
$fetch_last_error_code = false;
$fetch_last_content_type = false;
$fetch_last_error_content = false; // curl only for the time being
$fetch_curl_used = false;
$suppress_debugging = false;
libxml_disable_entity_loader(true);
// separate test because this is included before sanity checks
if (function_exists("mb_internal_encoding")) mb_internal_encoding("UTF-8");
date_default_timezone_set('UTC');
if (defined('E_DEPRECATED')) {
error_reporting(E_ALL & ~E_NOTICE & ~E_DEPRECATED);
} else {
error_reporting(E_ALL & ~E_NOTICE);
}
require_once 'config.php';
/**
* Define a constant if not already defined
*/
function define_default($name, $value) {
defined($name) or define($name, $value);
}
/* Some tunables you can override in config.php using define(): */
define_default('FEED_FETCH_TIMEOUT', 45);
// How may seconds to wait for response when requesting feed from a site
define_default('FEED_FETCH_NO_CACHE_TIMEOUT', 15);
// How may seconds to wait for response when requesting feed from a
// site when that feed wasn't cached before
define_default('FILE_FETCH_TIMEOUT', 45);
// Default timeout when fetching files from remote sites
define_default('FILE_FETCH_CONNECT_TIMEOUT', 15);
// How many seconds to wait for initial response from website when
// fetching files from remote sites
define_default('DAEMON_UPDATE_LOGIN_LIMIT', 30);
// stop updating feeds if users haven't logged in for X days
define_default('DAEMON_FEED_LIMIT', 500);
// feed limit for one update batch
define_default('DAEMON_SLEEP_INTERVAL', 120);
// default sleep interval between feed updates (sec)
define_default('MIN_CACHE_FILE_SIZE', 1024);
// do not cache files smaller than that (bytes)
define_default('CACHE_MAX_DAYS', 7);
// max age in days for various automatically cached (temporary) files
/* tunables end here */
if (DB_TYPE == "pgsql") {
define('SUBSTRING_FOR_DATE', 'SUBSTRING_FOR_DATE');
} else {
define('SUBSTRING_FOR_DATE', 'SUBSTRING');
}
/**
* Return available translations names.
*
* @access public
* @return array A array of available translations.
*/
function get_translations() {
$tr = array(
"auto" => "Detect automatically",
"ar_SA" => "العربيّة (Arabic)",
"bg_BG" => "Bulgarian",
"da_DA" => "Dansk",
"ca_CA" => "Català",
"cs_CZ" => "Česky",
"en_US" => "English",
"el_GR" => "Ελληνικά",
"es_ES" => "Español (España)",
"es_LA" => "Español",
"de_DE" => "Deutsch",
"fr_FR" => "Français",
"hu_HU" => "Magyar (Hungarian)",
"it_IT" => "Italiano",
"ja_JP" => "日本語 (Japanese)",
"lv_LV" => "Latviešu",
"nb_NO" => "Norwegian bokmål",
"nl_NL" => "Dutch",
"pl_PL" => "Polski",
"ru_RU" => "Русский",
"pt_BR" => "Portuguese/Brazil",
"pt_PT" => "Portuguese/Portugal",
"zh_CN" => "Simplified Chinese",
"zh_TW" => "Traditional Chinese",
"sv_SE" => "Svenska",
"fi_FI" => "Suomi",
"tr_TR" => "Türkçe");
return $tr;
}
require_once "lib/accept-to-gettext.php";
require_once "lib/gettext/gettext.inc";
function startup_gettext() {
# Get locale from Accept-Language header
$lang = al2gt(array_keys(get_translations()), "text/html");
if (defined('_TRANSLATION_OVERRIDE_DEFAULT')) {
$lang = _TRANSLATION_OVERRIDE_DEFAULT;
}
if ($_SESSION["uid"] && get_schema_version() >= 120) {
$pref_lang = get_pref("USER_LANGUAGE", $_SESSION["uid"]);
if ($pref_lang && $pref_lang != 'auto') {
$lang = $pref_lang;
}
}
if ($lang) {
if (defined('LC_MESSAGES')) {
_setlocale(LC_MESSAGES, $lang);
} else if (defined('LC_ALL')) {
_setlocale(LC_ALL, $lang);
}
_bindtextdomain("messages", "locale");
_textdomain("messages");
_bind_textdomain_codeset("messages", "UTF-8");
}
}
require_once 'db-prefs.php';
require_once 'version.php';
require_once 'controls.php';
define('SELF_USER_AGENT', 'Tiny Tiny RSS/' . VERSION . ' (http://tt-rss.org/)');
ini_set('user_agent', SELF_USER_AGENT);
$schema_version = false;
function _debug_suppress($suppress) {
global $suppress_debugging;
$suppress_debugging = $suppress;
}
/**
* Print a timestamped debug message.
*
* @param string $msg The debug message.
* @return void
*/
function _debug($msg, $show = true) {
global $suppress_debugging;
//echo "[$suppress_debugging] $msg $show\n";
if ($suppress_debugging) return false;
$ts = strftime("%H:%M:%S", time());
if (function_exists('posix_getpid')) {
$ts = "$ts/" . posix_getpid();
}
if ($show && !(defined('QUIET') && QUIET)) {
print "[$ts] $msg\n";
}
if (defined('LOGFILE')) {
$fp = fopen(LOGFILE, 'a+');
if ($fp) {
$locked = false;
if (function_exists("flock")) {
$tries = 0;
// try to lock logfile for writing
while ($tries < 5 && !$locked = flock($fp, LOCK_EX | LOCK_NB)) {
sleep(1);
++$tries;
}
if (!$locked) {
fclose($fp);
return;
}
}
fputs($fp, "[$ts] $msg\n");
if (function_exists("flock")) {
flock($fp, LOCK_UN);
}
fclose($fp);
}
}
} // function _debug
/**
* Purge a feed old posts.
*
* @param mixed $link A database connection.
* @param mixed $feed_id The id of the purged feed.
* @param mixed $purge_interval Olderness of purged posts.
* @param boolean $debug Set to True to enable the debug. False by default.
* @access public
* @return void
*/
function purge_feed($feed_id, $purge_interval, $debug = false) {
if (!$purge_interval) $purge_interval = feed_purge_interval($feed_id);
$rows = -1;
$result = db_query(
"SELECT owner_uid FROM ttrss_feeds WHERE id = '$feed_id'");
$owner_uid = false;
if (db_num_rows($result) == 1) {
$owner_uid = db_fetch_result($result, 0, "owner_uid");
}
if ($purge_interval == -1 || !$purge_interval) {
if ($owner_uid) {
CCache::update($feed_id, $owner_uid);
}
return;
}
if (!$owner_uid) return;
if (FORCE_ARTICLE_PURGE == 0) {
$purge_unread = get_pref("PURGE_UNREAD_ARTICLES",
$owner_uid, false);
} else {
$purge_unread = true;
$purge_interval = FORCE_ARTICLE_PURGE;
}
if (!$purge_unread) $query_limit = " unread = false AND ";
if (DB_TYPE == "pgsql") {
$result = db_query("DELETE FROM ttrss_user_entries
USING ttrss_entries
WHERE ttrss_entries.id = ref_id AND
marked = false AND
feed_id = '$feed_id' AND
$query_limit
ttrss_entries.date_updated < NOW() - INTERVAL '$purge_interval days'");
} else {
/* $result = db_query("DELETE FROM ttrss_user_entries WHERE
marked = false AND feed_id = '$feed_id' AND
(SELECT date_updated FROM ttrss_entries WHERE
id = ref_id) < DATE_SUB(NOW(), INTERVAL $purge_interval DAY)"); */
$result = db_query("DELETE FROM ttrss_user_entries
USING ttrss_user_entries, ttrss_entries
WHERE ttrss_entries.id = ref_id AND
marked = false AND
feed_id = '$feed_id' AND
$query_limit
ttrss_entries.date_updated < DATE_SUB(NOW(), INTERVAL $purge_interval DAY)");
}
$rows = db_affected_rows($result);
CCache::update($feed_id, $owner_uid);
if ($debug) {
_debug("Purged feed $feed_id ($purge_interval): deleted $rows articles");
}
return $rows;
} // function purge_feed
function feed_purge_interval($feed_id) {
$result = db_query("SELECT purge_interval, owner_uid FROM ttrss_feeds
WHERE id = '$feed_id'");
if (db_num_rows($result) == 1) {
$purge_interval = db_fetch_result($result, 0, "purge_interval");
$owner_uid = db_fetch_result($result, 0, "owner_uid");
if ($purge_interval == 0) $purge_interval = get_pref(
'PURGE_OLD_DAYS', $owner_uid);
return $purge_interval;
} else {
return -1;
}
}
/*function get_feed_update_interval($feed_id) {
$result = db_query("SELECT owner_uid, update_interval FROM
ttrss_feeds WHERE id = '$feed_id'");
if (db_num_rows($result) == 1) {
$update_interval = db_fetch_result($result, 0, "update_interval");
$owner_uid = db_fetch_result($result, 0, "owner_uid");
if ($update_interval != 0) {
return $update_interval;
} else {
return get_pref('DEFAULT_UPDATE_INTERVAL', $owner_uid, false);
}
} else {
return -1;
}
}*/
// TODO: multiple-argument way is deprecated, first parameter is a hash now
function fetch_file_contents($options /* previously: 0: $url , 1: $type = false, 2: $login = false, 3: $pass = false,
4: $post_query = false, 5: $timeout = false, 6: $timestamp = 0, 7: $useragent = false*/) {
global $fetch_last_error;
global $fetch_last_error_code;
global $fetch_last_error_content;
global $fetch_last_content_type;
global $fetch_curl_used;
$fetch_last_error = false;
$fetch_last_error_code = -1;
$fetch_last_error_content = "";
$fetch_last_content_type = "";
$fetch_curl_used = false;
if (!is_array($options)) {
// falling back on compatibility shim
$option_names = [ "url", "type", "login", "pass", "post_query", "timeout", "timestamp", "useragent" ];
$tmp = [];
for ($i = 0; $i < func_num_args(); $i++) {
$tmp[$option_names[$i]] = func_get_arg($i);
}
$options = $tmp;
/*$options = array(
"url" => func_get_arg(0),
"type" => @func_get_arg(1),
"login" => @func_get_arg(2),
"pass" => @func_get_arg(3),
"post_query" => @func_get_arg(4),
"timeout" => @func_get_arg(5),
"timestamp" => @func_get_arg(6),
"useragent" => @func_get_arg(7)
); */
}
$url = $options["url"];
$type = isset($options["type"]) ? $options["type"] : false;
$login = isset($options["login"]) ? $options["login"] : false;
$pass = isset($options["pass"]) ? $options["pass"] : false;
$post_query = isset($options["post_query"]) ? $options["post_query"] : false;
$timeout = isset($options["timeout"]) ? $options["timeout"] : false;
$timestamp = isset($options["timestamp"]) ? $options["timestamp"] : 0;
$useragent = isset($options["useragent"]) ? $options["useragent"] : false;
$followlocation = isset($options["followlocation"]) ? $options["followlocation"] : true;
$url = ltrim($url, ' ');
$url = str_replace(' ', '%20', $url);
if (strpos($url, "//") === 0)
$url = 'http:' . $url;
if (!defined('NO_CURL') && function_exists('curl_init') && !ini_get("open_basedir")) {
$fetch_curl_used = true;
$ch = curl_init($url);
if ($timestamp && !$post_query) {
curl_setopt($ch, CURLOPT_HTTPHEADER,
array("If-Modified-Since: ".gmdate('D, d M Y H:i:s \G\M\T', $timestamp)));
}
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, $timeout ? $timeout : FILE_FETCH_CONNECT_TIMEOUT);
curl_setopt($ch, CURLOPT_TIMEOUT, $timeout ? $timeout : FILE_FETCH_TIMEOUT);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, !ini_get("open_basedir") && $followlocation);
curl_setopt($ch, CURLOPT_MAXREDIRS, 20);
curl_setopt($ch, CURLOPT_BINARYTRANSFER, true);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPAUTH, CURLAUTH_ANY);
curl_setopt($ch, CURLOPT_USERAGENT, $useragent ? $useragent :
SELF_USER_AGENT);
curl_setopt($ch, CURLOPT_ENCODING, "");
//curl_setopt($ch, CURLOPT_REFERER, $url);
if (!ini_get("open_basedir")) {
curl_setopt($ch, CURLOPT_COOKIEJAR, "/dev/null");
}
if (defined('_CURL_HTTP_PROXY')) {
curl_setopt($ch, CURLOPT_PROXY, _CURL_HTTP_PROXY);
}
if ($post_query) {
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, $post_query);
}
if ($login && $pass)
curl_setopt($ch, CURLOPT_USERPWD, "$login:$pass");
$contents = @curl_exec($ch);
if (curl_errno($ch) === 23 || curl_errno($ch) === 61) {
curl_setopt($ch, CURLOPT_ENCODING, 'none');
$contents = @curl_exec($ch);
}
if ($contents === false) {
$fetch_last_error = curl_errno($ch) . " " . curl_error($ch);
curl_close($ch);
return false;
}
$http_code = curl_getinfo($ch, CURLINFO_HTTP_CODE);
$fetch_last_content_type = curl_getinfo($ch, CURLINFO_CONTENT_TYPE);
$fetch_last_error_code = $http_code;
if ($http_code != 200 || $type && strpos($fetch_last_content_type, "$type") === false) {
if (curl_errno($ch) != 0) {
$fetch_last_error = curl_errno($ch) . " " . curl_error($ch);
} else {
$fetch_last_error = "HTTP Code: $http_code";
}
$fetch_last_error_content = $contents;
curl_close($ch);
return false;
}
curl_close($ch);
return $contents;
} else {
$fetch_curl_used = false;
if ($login && $pass){
$url_parts = array();
preg_match("/(^[^:]*):\/\/(.*)/", $url, $url_parts);
$pass = urlencode($pass);
if ($url_parts[1] && $url_parts[2]) {
$url = $url_parts[1] . "://$login:$pass@" . $url_parts[2];
}
}
// TODO: should this support POST requests or not? idk
if (!$post_query && $timestamp) {
$context = stream_context_create(array(
'http' => array(
'method' => 'GET',
'ignore_errors' => true,
'timeout' => $timeout ? $timeout : FILE_FETCH_TIMEOUT,
'protocol_version'=> 1.1,
'header' => "If-Modified-Since: ".gmdate("D, d M Y H:i:s \\G\\M\\T\r\n", $timestamp)
)));
} else {
$context = stream_context_create(array(
'http' => array(
'method' => 'GET',
'ignore_errors' => true,
'timeout' => $timeout ? $timeout : FILE_FETCH_TIMEOUT,
'protocol_version'=> 1.1
)));
}
$old_error = error_get_last();
$data = @file_get_contents($url, false, $context);
if (isset($http_response_header) && is_array($http_response_header)) {
foreach ($http_response_header as $h) {
if (substr(strtolower($h), 0, 13) == 'content-type:') {
$fetch_last_content_type = substr($h, 14);
// don't abort here b/c there might be more than one
// e.g. if we were being redirected -- last one is the right one
}
if (substr(strtolower($h), 0, 7) == 'http/1.') {
$fetch_last_error_code = (int) substr($h, 9, 3);
}
}
}
if ($fetch_last_error_code != 200) {
$error = error_get_last();
if ($error['message'] != $old_error['message']) {
$fetch_last_error = $error["message"];
} else {
$fetch_last_error = "HTTP Code: $fetch_last_error_code";
}
$fetch_last_error_content = $data;
return false;
}
return $data;
}
}
/**
* Try to determine the favicon URL for a feed.
* adapted from wordpress favicon plugin by Jeff Minard (http://thecodepro.com/)
* http://dev.wp-plugins.org/file/favatars/trunk/favatars.php
*
* @param string $url A feed or page URL
* @access public
* @return mixed The favicon URL, or false if none was found.
*/
function get_favicon_url($url) {
$favicon_url = false;
if ($html = @fetch_file_contents($url)) {
libxml_use_internal_errors(true);
$doc = new DOMDocument();
$doc->loadHTML($html);
$xpath = new DOMXPath($doc);
$base = $xpath->query('/html/head/base');
foreach ($base as $b) {
$url = $b->getAttribute("href");
break;
}
$entries = $xpath->query('/html/head/link[@rel="shortcut icon" or @rel="icon"]');
if (count($entries) > 0) {
foreach ($entries as $entry) {
$favicon_url = rewrite_relative_url($url, $entry->getAttribute("href"));
break;
}
}
}
if (!$favicon_url)
$favicon_url = rewrite_relative_url($url, "/favicon.ico");
return $favicon_url;
} // function get_favicon_url
function initialize_user_prefs($uid, $profile = false) {
$uid = db_escape_string($uid);
if (!$profile) {
$profile = "NULL";
$profile_qpart = "AND profile IS NULL";
} else {
$profile_qpart = "AND profile = '$profile'";
}
if (get_schema_version() < 63) $profile_qpart = "";
db_query("BEGIN");
$result = db_query("SELECT pref_name,def_value FROM ttrss_prefs");
$u_result = db_query("SELECT pref_name
FROM ttrss_user_prefs WHERE owner_uid = '$uid' $profile_qpart");
$active_prefs = array();
while ($line = db_fetch_assoc($u_result)) {
array_push($active_prefs, $line["pref_name"]);
}
while ($line = db_fetch_assoc($result)) {
if (array_search($line["pref_name"], $active_prefs) === FALSE) {
// print "adding " . $line["pref_name"] . "<br>";
$line["def_value"] = db_escape_string($line["def_value"]);
$line["pref_name"] = db_escape_string($line["pref_name"]);
if (get_schema_version() < 63) {
db_query("INSERT INTO ttrss_user_prefs
(owner_uid,pref_name,value) VALUES
('$uid', '".$line["pref_name"]."','".$line["def_value"]."')");
} else {
db_query("INSERT INTO ttrss_user_prefs
(owner_uid,pref_name,value, profile) VALUES
('$uid', '".$line["pref_name"]."','".$line["def_value"]."', $profile)");
}
}
}
db_query("COMMIT");
}
function get_ssl_certificate_id() {
if ($_SERVER["REDIRECT_SSL_CLIENT_M_SERIAL"]) {
return sha1($_SERVER["REDIRECT_SSL_CLIENT_M_SERIAL"] .
$_SERVER["REDIRECT_SSL_CLIENT_V_START"] .
$_SERVER["REDIRECT_SSL_CLIENT_V_END"] .
$_SERVER["REDIRECT_SSL_CLIENT_S_DN"]);
}
if ($_SERVER["SSL_CLIENT_M_SERIAL"]) {
return sha1($_SERVER["SSL_CLIENT_M_SERIAL"] .
$_SERVER["SSL_CLIENT_V_START"] .
$_SERVER["SSL_CLIENT_V_END"] .
$_SERVER["SSL_CLIENT_S_DN"]);
}
return "";
}
function authenticate_user($login, $password, $check_only = false) {
if (!SINGLE_USER_MODE) {
$user_id = false;
foreach (PluginHost::getInstance()->get_hooks(PluginHost::HOOK_AUTH_USER) as $plugin) {
$user_id = (int) $plugin->authenticate($login, $password);
if ($user_id) {
$_SESSION["auth_module"] = strtolower(get_class($plugin));
break;
}
}
if ($user_id && !$check_only) {
@session_start();
$_SESSION["uid"] = $user_id;
$_SESSION["version"] = VERSION_STATIC;
$result = db_query("SELECT login,access_level,pwd_hash FROM ttrss_users
WHERE id = '$user_id'");
$_SESSION["name"] = db_fetch_result($result, 0, "login");
$_SESSION["access_level"] = db_fetch_result($result, 0, "access_level");
$_SESSION["csrf_token"] = uniqid_short();
db_query("UPDATE ttrss_users SET last_login = NOW() WHERE id = " .
$_SESSION["uid"]);
$_SESSION["ip_address"] = $_SERVER["REMOTE_ADDR"];
$_SESSION["user_agent"] = sha1($_SERVER['HTTP_USER_AGENT']);
$_SESSION["pwd_hash"] = db_fetch_result($result, 0, "pwd_hash");
$_SESSION["last_version_check"] = time();
initialize_user_prefs($_SESSION["uid"]);
return true;
}
return false;
} else {
$_SESSION["uid"] = 1;
$_SESSION["name"] = "admin";
$_SESSION["access_level"] = 10;
$_SESSION["hide_hello"] = true;
$_SESSION["hide_logout"] = true;
$_SESSION["auth_module"] = false;
if (!$_SESSION["csrf_token"]) {
$_SESSION["csrf_token"] = uniqid_short();
}
$_SESSION["ip_address"] = $_SERVER["REMOTE_ADDR"];
initialize_user_prefs($_SESSION["uid"]);
return true;
}
}
function make_password($length = 8) {
$password = "";
$possible = "0123456789abcdfghjkmnpqrstvwxyzABCDFGHJKMNPQRSTVWXYZ";
$i = 0;
while ($i < $length) {
$char = substr($possible, mt_rand(0, strlen($possible)-1), 1);
if (!strstr($password, $char)) {
$password .= $char;
$i++;
}
}
return $password;
}
// this is called after user is created to initialize default feeds, labels
// or whatever else
// user preferences are checked on every login, not here
function initialize_user($uid) {
db_query("insert into ttrss_feeds (owner_uid,title,feed_url)
values ('$uid', 'Tiny Tiny RSS: Forum',
'http://tt-rss.org/forum/rss.php')");
}
function logout_user() {
session_destroy();
if (isset($_COOKIE[session_name()])) {
setcookie(session_name(), '', time()-42000, '/');
}
}
function validate_csrf($csrf_token) {
return $csrf_token == $_SESSION['csrf_token'];
}
function load_user_plugins($owner_uid, $pluginhost = false) {
if (!$pluginhost) $pluginhost = PluginHost::getInstance();
if ($owner_uid && SCHEMA_VERSION >= 100) {
$plugins = get_pref("_ENABLED_PLUGINS", $owner_uid);
$pluginhost->load($plugins, PluginHost::KIND_USER, $owner_uid);
if (get_schema_version() > 100) {
$pluginhost->load_data();
}
}
}
function login_sequence() {
if (SINGLE_USER_MODE) {
@session_start();
authenticate_user("admin", null);
startup_gettext();
load_user_plugins($_SESSION["uid"]);
} else {
if (!validate_session()) $_SESSION["uid"] = false;
if (!$_SESSION["uid"]) {
if (AUTH_AUTO_LOGIN && authenticate_user(null, null)) {
$_SESSION["ref_schema_version"] = get_schema_version(true);
} else {
authenticate_user(null, null, true);
}
if (!$_SESSION["uid"]) {
@session_destroy();
setcookie(session_name(), '', time()-42000, '/');
render_login_form();
exit;
}
} else {
/* bump login timestamp */
db_query("UPDATE ttrss_users SET last_login = NOW() WHERE id = " .
$_SESSION["uid"]);
$_SESSION["last_login_update"] = time();
}
if ($_SESSION["uid"]) {
startup_gettext();
load_user_plugins($_SESSION["uid"]);
/* cleanup ccache */
db_query("DELETE FROM ttrss_counters_cache WHERE owner_uid = ".
$_SESSION["uid"] . " AND
(SELECT COUNT(id) FROM ttrss_feeds WHERE
ttrss_feeds.id = feed_id) = 0");
db_query("DELETE FROM ttrss_cat_counters_cache WHERE owner_uid = ".
$_SESSION["uid"] . " AND
(SELECT COUNT(id) FROM ttrss_feed_categories WHERE
ttrss_feed_categories.id = feed_id) = 0");
}
}
}
function truncate_string($str, $max_len, $suffix = '&hellip;') {
if (mb_strlen($str, "utf-8") > $max_len) {
return mb_substr($str, 0, $max_len, "utf-8") . $suffix;
} else {
return $str;
}
}
// is not utf8 clean
function truncate_middle($str, $max_len, $suffix = '&hellip;') {
if (strlen($str) > $max_len) {
return substr_replace($str, $suffix, $max_len / 2, mb_strlen($str) - $max_len);
} else {
return $str;
}
}
function convert_timestamp($timestamp, $source_tz, $dest_tz) {
try {
$source_tz = new DateTimeZone($source_tz);
} catch (Exception $e) {
$source_tz = new DateTimeZone('UTC');
}
try {
$dest_tz = new DateTimeZone($dest_tz);
} catch (Exception $e) {
$dest_tz = new DateTimeZone('UTC');
}
$dt = new DateTime(date('Y-m-d H:i:s', $timestamp), $source_tz);
return $dt->format('U') + $dest_tz->getOffset($dt);
}
function make_local_datetime($timestamp, $long, $owner_uid = false,
$no_smart_dt = false, $eta_min = false) {
if (!$owner_uid) $owner_uid = $_SESSION['uid'];
if (!$timestamp) $timestamp = '1970-01-01 0:00';
global $utc_tz;
global $user_tz;
if (!$utc_tz) $utc_tz = new DateTimeZone('UTC');
$timestamp = substr($timestamp, 0, 19);
# We store date in UTC internally
$dt = new DateTime($timestamp, $utc_tz);
$user_tz_string = get_pref('USER_TIMEZONE', $owner_uid);
if ($user_tz_string != 'Automatic') {
try {
if (!$user_tz) $user_tz = new DateTimeZone($user_tz_string);
} catch (Exception $e) {
$user_tz = $utc_tz;
}
$tz_offset = $user_tz->getOffset($dt);
} else {
$tz_offset = (int) -$_SESSION["clientTzOffset"];
}
$user_timestamp = $dt->format('U') + $tz_offset;
if (!$no_smart_dt) {
return smart_date_time($user_timestamp,
$tz_offset, $owner_uid, $eta_min);
} else {
if ($long)
$format = get_pref('LONG_DATE_FORMAT', $owner_uid);
else
$format = get_pref('SHORT_DATE_FORMAT', $owner_uid);
return date($format, $user_timestamp);
}
}
function smart_date_time($timestamp, $tz_offset = 0, $owner_uid = false, $eta_min = false) {
if (!$owner_uid) $owner_uid = $_SESSION['uid'];
if ($eta_min && time() + $tz_offset - $timestamp < 3600) {
return T_sprintf("%d min", date("i", time() + $tz_offset - $timestamp));
} else if (date("Y.m.d", $timestamp) == date("Y.m.d", time() + $tz_offset)) {
return date("G:i", $timestamp);
} else if (date("Y", $timestamp) == date("Y", time() + $tz_offset)) {
$format = get_pref('SHORT_DATE_FORMAT', $owner_uid);
return date($format, $timestamp);
} else {
$format = get_pref('LONG_DATE_FORMAT', $owner_uid);
return date($format, $timestamp);
}
}
function sql_bool_to_bool($s) {
if ($s == "t" || $s == "1" || strtolower($s) == "true") {
return true;
} else {
return false;
}
}
function bool_to_sql_bool($s) {
if ($s) {
return "true";
} else {
return "false";
}
}
// Session caching removed due to causing wrong redirects to upgrade
// script when get_schema_version() is called on an obsolete session
// created on a previous schema version.
function get_schema_version($nocache = false) {
global $schema_version;
if (!$schema_version && !$nocache) {
$result = db_query("SELECT schema_version FROM ttrss_version");
$version = db_fetch_result($result, 0, "schema_version");
$schema_version = $version;
return $version;
} else {
return $schema_version;
}
}
function sanity_check() {
require_once 'errors.php';
global $ERRORS;
$error_code = 0;
$schema_version = get_schema_version(true);
if ($schema_version != SCHEMA_VERSION) {
$error_code = 5;
}
if (DB_TYPE == "mysql") {
$result = db_query("SELECT true", false);
if (db_num_rows($result) != 1) {
$error_code = 10;
}
}
if (db_escape_string("testTEST") != "testTEST") {
$error_code = 12;
}
return array("code" => $error_code, "message" => $ERRORS[$error_code]);
}
function file_is_locked($filename) {
if (file_exists(LOCK_DIRECTORY . "/$filename")) {
if (function_exists('flock')) {
$fp = @fopen(LOCK_DIRECTORY . "/$filename", "r");
if ($fp) {
if (flock($fp, LOCK_EX | LOCK_NB)) {
flock($fp, LOCK_UN);
fclose($fp);
return false;
}
fclose($fp);
return true;
} else {
return false;
}
}
return true; // consider the file always locked and skip the test
} else {
return false;
}
}
function make_lockfile($filename) {
$fp = fopen(LOCK_DIRECTORY . "/$filename", "w");
if ($fp && flock($fp, LOCK_EX | LOCK_NB)) {
$stat_h = fstat($fp);
$stat_f = stat(LOCK_DIRECTORY . "/$filename");
if (strtoupper(substr(PHP_OS, 0, 3)) !== 'WIN') {
if ($stat_h["ino"] != $stat_f["ino"] ||
$stat_h["dev"] != $stat_f["dev"]) {
return false;
}
}
if (function_exists('posix_getpid')) {
fwrite($fp, posix_getpid() . "\n");
}
return $fp;
} else {
return false;
}
}
function make_stampfile($filename) {
$fp = fopen(LOCK_DIRECTORY . "/$filename", "w");
if (flock($fp, LOCK_EX | LOCK_NB)) {
fwrite($fp, time() . "\n");
flock($fp, LOCK_UN);
fclose($fp);
return true;
} else {
return false;
}
}
function sql_random_function() {
if (DB_TYPE == "mysql") {
return "RAND()";
} else {
return "RANDOM()";
}
}
function getFeedUnread($feed, $is_cat = false) {
return Feeds::getFeedArticles($feed, $is_cat, true, $_SESSION["uid"]);
}
/*function get_pgsql_version() {
$result = db_query("SELECT version() AS version");
$version = explode(" ", db_fetch_result($result, 0, "version"));
return $version[1];
}*/
function checkbox_to_sql_bool($val) {
return ($val == "on") ? "true" : "false";
}
/*function getFeedCatTitle($id) {
if ($id == -1) {
return __("Special");
} else if ($id < LABEL_BASE_INDEX) {
return __("Labels");
} else if ($id > 0) {
$result = db_query("SELECT ttrss_feed_categories.title
FROM ttrss_feeds, ttrss_feed_categories WHERE ttrss_feeds.id = '$id' AND
cat_id = ttrss_feed_categories.id");
if (db_num_rows($result) == 1) {
return db_fetch_result($result, 0, "title");
} else {
return __("Uncategorized");
}
} else {
return "getFeedCatTitle($id) failed";
}
}*/
function uniqid_short() {
return uniqid(base_convert(rand(), 10, 36));
}
function make_init_params() {
$params = array();
foreach (array("ON_CATCHUP_SHOW_NEXT_FEED", "HIDE_READ_FEEDS",
"ENABLE_FEED_CATS", "FEEDS_SORT_BY_UNREAD", "CONFIRM_FEED_CATCHUP",
"CDM_AUTO_CATCHUP", "FRESH_ARTICLE_MAX_AGE",
"HIDE_READ_SHOWS_SPECIAL", "COMBINED_DISPLAY_MODE") as $param) {
$params[strtolower($param)] = (int) get_pref($param);
}
$params["icons_url"] = ICONS_URL;
$params["cookie_lifetime"] = SESSION_COOKIE_LIFETIME;
$params["default_view_mode"] = get_pref("_DEFAULT_VIEW_MODE");
$params["default_view_limit"] = (int) get_pref("_DEFAULT_VIEW_LIMIT");
$params["default_view_order_by"] = get_pref("_DEFAULT_VIEW_ORDER_BY");
$params["bw_limit"] = (int) $_SESSION["bw_limit"];
$params["label_base_index"] = (int) LABEL_BASE_INDEX;
$theme = get_pref( "USER_CSS_THEME", false, false);
$params["theme"] = theme_valid("$theme") ? $theme : "";
$params["plugins"] = implode(", ", PluginHost::getInstance()->get_plugin_names());
$params["php_platform"] = PHP_OS;
$params["php_version"] = PHP_VERSION;
$params["sanity_checksum"] = sha1(file_get_contents("include/sanity_check.php"));
$result = db_query("SELECT MAX(id) AS mid, COUNT(*) AS nf FROM
ttrss_feeds WHERE owner_uid = " . $_SESSION["uid"]);
$max_feed_id = db_fetch_result($result, 0, "mid");
$num_feeds = db_fetch_result($result, 0, "nf");
$params["max_feed_id"] = (int) $max_feed_id;
$params["num_feeds"] = (int) $num_feeds;
$params["hotkeys"] = get_hotkeys_map();
$params["csrf_token"] = $_SESSION["csrf_token"];
$params["widescreen"] = (int) $_COOKIE["ttrss_widescreen"];
$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;
}
function get_hotkeys_info() {
$hotkeys = array(
__("Navigation") => array(
"next_feed" => __("Open next feed"),
"prev_feed" => __("Open previous feed"),
"next_article" => __("Open next article"),
"prev_article" => __("Open previous article"),
"next_article_noscroll" => __("Open next article (don't scroll long articles)"),
"prev_article_noscroll" => __("Open previous article (don't scroll long articles)"),
"next_article_noexpand" => __("Move to next article (don't expand or mark read)"),
"prev_article_noexpand" => __("Move to previous article (don't expand or mark read)"),
"search_dialog" => __("Show search dialog")),
__("Article") => array(
"toggle_mark" => __("Toggle starred"),
"toggle_publ" => __("Toggle published"),
"toggle_unread" => __("Toggle unread"),
"edit_tags" => __("Edit tags"),
"open_in_new_window" => __("Open in new window"),
"catchup_below" => __("Mark below as read"),
"catchup_above" => __("Mark above as read"),
"article_scroll_down" => __("Scroll down"),
"article_scroll_up" => __("Scroll up"),
"select_article_cursor" => __("Select article under cursor"),
"email_article" => __("Email article"),
"close_article" => __("Close/collapse article"),
"toggle_expand" => __("Toggle article expansion (combined mode)"),
"toggle_widescreen" => __("Toggle widescreen mode"),
"toggle_embed_original" => __("Toggle embed original")),
__("Article selection") => array(
"select_all" => __("Select all articles"),
"select_unread" => __("Select unread"),
"select_marked" => __("Select starred"),
"select_published" => __("Select published"),
"select_invert" => __("Invert selection"),
"select_none" => __("Deselect everything")),
__("Feed") => array(
"feed_refresh" => __("Refresh current feed"),
"feed_unhide_read" => __("Un/hide read feeds"),
"feed_subscribe" => __("Subscribe to feed"),
"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"),
"cat_toggle_collapse" => __("Un/collapse current category"),
"toggle_combined_mode" => __("Toggle combined mode"),
"toggle_cdm_expanded" => __("Toggle auto expand in combined mode")),
__("Go to") => array(
"goto_all" => __("All articles"),
"goto_fresh" => __("Fresh"),
"goto_marked" => __("Starred"),
"goto_published" => __("Published"),
"goto_tagcloud" => __("Tag cloud"),
"goto_prefs" => __("Preferences")),
__("Other") => array(
"create_label" => __("Create label"),
"create_filter" => __("Create filter"),
"collapse_sidebar" => __("Un/collapse sidebar"),
"help_dialog" => __("Show help dialog"))
);
foreach (PluginHost::getInstance()->get_hooks(PluginHost::HOOK_HOTKEY_INFO) as $plugin) {
$hotkeys = $plugin->hook_hotkey_info($hotkeys);
}
return $hotkeys;
}
function get_hotkeys_map() {
$hotkeys = array(
// "navigation" => array(
"k" => "next_feed",
"j" => "prev_feed",
"n" => "next_article",
"p" => "prev_article",
"(38)|up" => "prev_article",
"(40)|down" => "next_article",
// "^(38)|Ctrl-up" => "prev_article_noscroll",
// "^(40)|Ctrl-down" => "next_article_noscroll",
"(191)|/" => "search_dialog",
// "article" => array(
"s" => "toggle_mark",
"*s" => "toggle_publ",
"u" => "toggle_unread",
"*t" => "edit_tags",
"o" => "open_in_new_window",
"c p" => "catchup_below",
"c n" => "catchup_above",
"*n" => "article_scroll_down",
"*p" => "article_scroll_up",
"*(38)|Shift+up" => "article_scroll_up",
"*(40)|Shift+down" => "article_scroll_down",
"a *w" => "toggle_widescreen",
"a e" => "toggle_embed_original",
"e" => "email_article",
"a q" => "close_article",
// "article_selection" => array(
"a a" => "select_all",
"a u" => "select_unread",
"a *u" => "select_marked",
"a p" => "select_published",
"a i" => "select_invert",
"a n" => "select_none",
// "feed" => array(
"f r" => "feed_refresh",
"f a" => "feed_unhide_read",
"f s" => "feed_subscribe",
"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",
"f c" => "toggle_cdm_expanded",
"*q" => "catchup_all",
"x" => "cat_toggle_collapse",
// "goto" => array(
"g a" => "goto_all",
"g f" => "goto_fresh",
"g s" => "goto_marked",
"g p" => "goto_published",
"g t" => "goto_tagcloud",
"g *p" => "goto_prefs",
// "other" => array(
"(9)|Tab" => "select_article_cursor", // tab
"c l" => "create_label",
"c f" => "create_filter",
"c s" => "collapse_sidebar",
"^(191)|Ctrl+/" => "help_dialog",
);
if (get_pref('COMBINED_DISPLAY_MODE')) {
$hotkeys["^(38)|Ctrl-up"] = "prev_article_noscroll";
$hotkeys["^(40)|Ctrl-down"] = "next_article_noscroll";
}
foreach (PluginHost::getInstance()->get_hooks(PluginHost::HOOK_HOTKEY_MAP) as $plugin) {
$hotkeys = $plugin->hook_hotkey_map($hotkeys);
}
$prefixes = array();
foreach (array_keys($hotkeys) as $hotkey) {
$pair = explode(" ", $hotkey, 2);
if (count($pair) > 1 && !in_array($pair[0], $prefixes)) {
array_push($prefixes, $pair[0]);
}
}
return array($prefixes, $hotkeys);
}
function check_for_update() {
if (defined("GIT_VERSION_TIMESTAMP")) {
$content = @fetch_file_contents(array("url" => "http://tt-rss.org/version.json", "timeout" => 5));
if ($content) {
$content = json_decode($content, true);
if ($content && isset($content["changeset"])) {
if ((int)GIT_VERSION_TIMESTAMP < (int)$content["changeset"]["timestamp"] &&
GIT_VERSION_HEAD != $content["changeset"]["id"]) {
return $content["changeset"]["id"];
}
}
}
}
return "";
}
function make_runtime_info($disable_update_check = false) {
$data = array();
$result = db_query("SELECT MAX(id) AS mid, COUNT(*) AS nf FROM
ttrss_feeds WHERE owner_uid = " . $_SESSION["uid"]);
$max_feed_id = db_fetch_result($result, 0, "mid");
$num_feeds = db_fetch_result($result, 0, "nf");
$data["max_feed_id"] = (int) $max_feed_id;
$data["num_feeds"] = (int) $num_feeds;
$data['last_article_id'] = Article::getLastArticleId();
$data['cdm_expanded'] = get_pref('CDM_EXPANDED');
$data['dep_ts'] = calculate_dep_timestamp();
$data['reload_on_ts_change'] = !defined('_NO_RELOAD_ON_TS_CHANGE');
if (CHECK_FOR_UPDATES && !$disable_update_check && $_SESSION["last_version_check"] + 86400 + rand(-1000, 1000) < time()) {
$update_result = @check_for_update();
$data["update_result"] = $update_result;
$_SESSION["last_version_check"] = time();
}
if (file_exists(LOCK_DIRECTORY . "/update_daemon.lock")) {
$data['daemon_is_running'] = (int) file_is_locked("update_daemon.lock");
if (time() - $_SESSION["daemon_stamp_check"] > 30) {
$stamp = (int) @file_get_contents(LOCK_DIRECTORY . "/update_daemon.stamp");
if ($stamp) {
$stamp_delta = time() - $stamp;
if ($stamp_delta > 1800) {
$stamp_check = 0;
} else {
$stamp_check = 1;
$_SESSION["daemon_stamp_check"] = time();
}
$data['daemon_stamp_ok'] = $stamp_check;
$stamp_fmt = date("Y.m.d, G:i", $stamp);
$data['daemon_stamp'] = $stamp_fmt;
}
}
}
return $data;
}
function search_to_sql($search, $search_language) {
$keywords = str_getcsv(trim($search), " ");
$query_keywords = array();
$search_words = array();
$search_query_leftover = array();
if ($search_language)
$search_language = db_escape_string(mb_strtolower($search_language));
else
$search_language = "english";
foreach ($keywords as $k) {
if (strpos($k, "-") === 0) {
$k = substr($k, 1);
$not = "NOT";
} else {
$not = "";
}
$commandpair = explode(":", mb_strtolower($k), 2);
switch ($commandpair[0]) {
case "title":
if ($commandpair[1]) {
array_push($query_keywords, "($not (LOWER(ttrss_entries.title) LIKE '%".
db_escape_string(mb_strtolower($commandpair[1]))."%'))");
} else {
array_push($query_keywords, "(UPPER(ttrss_entries.title) $not LIKE UPPER('%$k%')
OR UPPER(ttrss_entries.content) $not LIKE UPPER('%$k%'))");
array_push($search_words, $k);
}
break;
case "author":
if ($commandpair[1]) {
array_push($query_keywords, "($not (LOWER(author) LIKE '%".
db_escape_string(mb_strtolower($commandpair[1]))."%'))");
} else {
array_push($query_keywords, "(UPPER(ttrss_entries.title) $not LIKE UPPER('%$k%')
OR UPPER(ttrss_entries.content) $not LIKE UPPER('%$k%'))");
array_push($search_words, $k);
}
break;
case "note":
if ($commandpair[1]) {
if ($commandpair[1] == "true")
array_push($query_keywords, "($not (note IS NOT NULL AND note != ''))");
else if ($commandpair[1] == "false")
array_push($query_keywords, "($not (note IS NULL OR note = ''))");
else
array_push($query_keywords, "($not (LOWER(note) LIKE '%".
db_escape_string(mb_strtolower($commandpair[1]))."%'))");
} else {
array_push($query_keywords, "(UPPER(ttrss_entries.title) $not LIKE UPPER('%$k%')
OR UPPER(ttrss_entries.content) $not LIKE UPPER('%$k%'))");
if (!$not) array_push($search_words, $k);
}
break;
case "star":
if ($commandpair[1]) {
if ($commandpair[1] == "true")
array_push($query_keywords, "($not (marked = true))");
else
array_push($query_keywords, "($not (marked = false))");
} else {
array_push($query_keywords, "(UPPER(ttrss_entries.title) $not LIKE UPPER('%$k%')
OR UPPER(ttrss_entries.content) $not LIKE UPPER('%$k%'))");
if (!$not) array_push($search_words, $k);
}
break;
case "pub":
if ($commandpair[1]) {
if ($commandpair[1] == "true")
array_push($query_keywords, "($not (published = true))");
else
array_push($query_keywords, "($not (published = false))");
} else {
array_push($query_keywords, "(UPPER(ttrss_entries.title) $not LIKE UPPER('%$k%')
OR UPPER(ttrss_entries.content) $not LIKE UPPER('%$k%'))");
if (!$not) array_push($search_words, $k);
}
break;
case "unread":
if ($commandpair[1]) {
if ($commandpair[1] == "true")
array_push($query_keywords, "($not (unread = true))");
else
array_push($query_keywords, "($not (unread = false))");
} else {
array_push($query_keywords, "(UPPER(ttrss_entries.title) $not LIKE UPPER('%$k%')
OR UPPER(ttrss_entries.content) $not LIKE UPPER('%$k%'))");
if (!$not) array_push($search_words, $k);
}
break;
default:
if (strpos($k, "@") === 0) {
$user_tz_string = get_pref('USER_TIMEZONE', $_SESSION['uid']);
$orig_ts = strtotime(substr($k, 1));
$k = date("Y-m-d", convert_timestamp($orig_ts, $user_tz_string, 'UTC'));
//$k = date("Y-m-d", strtotime(substr($k, 1)));
array_push($query_keywords, "(".SUBSTRING_FOR_DATE."(updated,1,LENGTH('$k')) $not = '$k')");
} else {
if (DB_TYPE == "pgsql") {
$k = mb_strtolower($k);
array_push($search_query_leftover, $not ? "!$k" : $k);
} else {
array_push($query_keywords, "(UPPER(ttrss_entries.title) $not LIKE UPPER('%$k%')
OR UPPER(ttrss_entries.content) $not LIKE UPPER('%$k%'))");
}
if (!$not) array_push($search_words, $k);
}
}
}
if (count($search_query_leftover) > 0) {
$search_query_leftover = db_escape_string(implode(" & ", $search_query_leftover));
if (DB_TYPE == "pgsql") {
array_push($query_keywords,
"(tsvector_combined @@ to_tsquery('$search_language', '$search_query_leftover'))");
}
}
$search_query_part = implode("AND", $query_keywords);
return array($search_query_part, $search_words);
}
function iframe_whitelisted($entry) {
$whitelist = array("youtube.com", "youtu.be", "vimeo.com", "player.vimeo.com");
@$src = parse_url($entry->getAttribute("src"), PHP_URL_HOST);
if ($src) {
foreach ($whitelist as $w) {
if ($src == $w || $src == "www.$w")
return true;
}
}
return false;
}
function sanitize($str, $force_remove_images = false, $owner = false, $site_url = false, $highlight_words = false, $article_id = false) {
if (!$owner) $owner = $_SESSION["uid"];
$res = trim($str); if (!$res) return '';
$charset_hack = '<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
</head>';
$res = trim($res); if (!$res) return '';
libxml_use_internal_errors(true);
$doc = new DOMDocument();
$doc->loadHTML($charset_hack . $res);
$xpath = new DOMXPath($doc);
$rewrite_base_url = $site_url ? $site_url : get_self_url_prefix();
$entries = $xpath->query('(//a[@href]|//img[@src]|//video/source[@src]|//audio/source[@src])');
foreach ($entries as $entry) {
if ($entry->hasAttribute('href')) {
$entry->setAttribute('href',
rewrite_relative_url($rewrite_base_url, $entry->getAttribute('href')));
$entry->setAttribute('rel', 'noopener noreferrer');
}
if ($entry->hasAttribute('src')) {
$src = rewrite_relative_url($rewrite_base_url, $entry->getAttribute('src'));
$cached_filename = CACHE_DIR . '/images/' . sha1($src);
if (file_exists($cached_filename)) {
// this is strictly cosmetic
if ($entry->tagName == 'img') {
$suffix = ".png";
} else if ($entry->parentNode && $entry->parentNode->tagName == "video") {
$suffix = ".mp4";
} else if ($entry->parentNode && $entry->parentNode->tagName == "audio") {
$suffix = ".ogg";
} else {
$suffix = "";
}
$src = get_self_url_prefix() . '/public.php?op=cached_url&hash=' . sha1($src) . $suffix;
if ($entry->hasAttribute('srcset')) {
$entry->removeAttribute('srcset');
}
if ($entry->hasAttribute('sizes')) {
$entry->removeAttribute('sizes');
}
}
$entry->setAttribute('src', $src);
}
if ($entry->nodeName == 'img') {
if ($entry->hasAttribute('src')) {
$is_https_url = parse_url($entry->getAttribute('src'), PHP_URL_SCHEME) === 'https';
if (is_prefix_https() && !$is_https_url) {
if ($entry->hasAttribute('srcset')) {
$entry->removeAttribute('srcset');
}
if ($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");
}
}
$entries = $xpath->query('//iframe');
foreach ($entries as $entry) {
if (!iframe_whitelisted($entry)) {
$entry->setAttribute('sandbox', 'allow-scripts');
} else {
if (is_prefix_https()) {
$entry->setAttribute("src",
str_replace("http://", "https://",
$entry->getAttribute("src")));
}
}
}
$allowed_elements = array('a', 'address', 'acronym', 'audio', 'article', 'aside',
'b', 'bdi', 'bdo', 'big', 'blockquote', 'body', 'br',
'caption', 'cite', 'center', 'code', 'col', 'colgroup',
'data', 'dd', 'del', 'details', 'description', 'dfn', 'div', 'dl', 'font',
'dt', 'em', 'footer', 'figure', 'figcaption',
'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'header', 'html', 'i',
'img', 'ins', 'kbd', 'li', 'main', 'mark', 'nav', 'noscript',
'ol', 'p', 'pre', 'q', 'ruby', 'rp', 'rt', 's', 'samp', 'section',
'small', 'source', 'span', 'strike', 'strong', 'sub', 'summary',
'sup', 'table', 'tbody', 'td', 'tfoot', 'th', 'thead', 'time',
'tr', 'track', 'tt', 'u', 'ul', 'var', 'wbr', 'video', 'xml:namespace' );
if ($_SESSION['hasSandbox']) $allowed_elements[] = 'iframe';
$disallowed_attributes = array('id', 'style', 'class');
foreach (PluginHost::getInstance()->get_hooks(PluginHost::HOOK_SANITIZE) as $plugin) {
$retval = $plugin->hook_sanitize($doc, $site_url, $allowed_elements, $disallowed_attributes, $article_id);
if (is_array($retval)) {
$doc = $retval[0];
$allowed_elements = $retval[1];
$disallowed_attributes = $retval[2];
} else {
$doc = $retval;
}
}
$doc->removeChild($doc->firstChild); //remove doctype
$doc = strip_harmful_tags($doc, $allowed_elements, $disallowed_attributes);
if ($highlight_words) {
foreach ($highlight_words as $word) {
// http://stackoverflow.com/questions/4081372/highlight-keywords-in-a-paragraph
$elements = $xpath->query("//*/text()");
foreach ($elements as $child) {
$fragment = $doc->createDocumentFragment();
$text = $child->textContent;
while (($pos = mb_stripos($text, $word)) !== false) {
$fragment->appendChild(new DomText(mb_substr($text, 0, $pos)));
$word = mb_substr($text, $pos, mb_strlen($word));
$highlight = $doc->createElement('span');
$highlight->appendChild(new DomText($word));
$highlight->setAttribute('class', 'highlight');
$fragment->appendChild($highlight);
$text = mb_substr($text, $pos + mb_strlen($word));
}
if (!empty($text)) $fragment->appendChild(new DomText($text));
$child->parentNode->replaceChild($fragment, $child);
}
}
}
$res = $doc->saveHTML();
/* 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) {
$xpath = new DOMXPath($doc);
$entries = $xpath->query('//*');
foreach ($entries as $entry) {
if (!in_array($entry->nodeName, $allowed_elements)) {
$entry->parentNode->removeChild($entry);
}
if ($entry->hasAttributes()) {
$attrs_to_remove = array();
foreach ($entry->attributes as $attr) {
if (strpos($attr->nodeName, 'on') === 0) {
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, $attr);
}
}
foreach ($attrs_to_remove as $attr) {
$entry->removeAttributeNode($attr);
}
}
}
return $doc;
}
function trim_array($array) {
$tmp = $array;
array_walk($tmp, 'trim');
return $tmp;
}
function tag_is_valid($tag) {
if ($tag == '') return false;
if (is_numeric($tag)) return false;
if (mb_strlen($tag) > 250) return false;
if (!$tag) return false;
return true;
}
function render_login_form() {
header('Cache-Control: public');
require_once "login_form.php";
exit;
}
function T_sprintf() {
$args = func_get_args();
return vsprintf(__(array_shift($args)), $args);
}
function print_checkpoint($n, $s) {
$ts = microtime(true);
echo sprintf("<!-- CP[$n] %.4f seconds -->\n", $ts - $s);
return $ts;
}
function sanitize_tag($tag) {
$tag = trim($tag);
$tag = mb_strtolower($tag, 'utf-8');
$tag = preg_replace('/[,\'\"\+\>\<]/', "", $tag);
if (DB_TYPE == "mysql") {
$tag = preg_replace('/[\x{10000}-\x{10FFFF}]/u', "\xEF\xBF\xBD", $tag);
}
return $tag;
}
function is_server_https() {
return (!empty($_SERVER['HTTPS']) && ($_SERVER['HTTPS'] != 'off')) || $_SERVER['HTTP_X_FORWARDED_PROTO'] == 'https';
}
function is_prefix_https() {
return parse_url(SELF_URL_PATH, PHP_URL_SCHEME) == 'https';
}
// this returns SELF_URL_PATH sans ending slash
function get_self_url_prefix() {
if (strrpos(SELF_URL_PATH, "/") === strlen(SELF_URL_PATH)-1) {
return substr(SELF_URL_PATH, 0, strlen(SELF_URL_PATH)-1);
} else {
return SELF_URL_PATH;
}
}
function encrypt_password($pass, $salt = '', $mode2 = false) {
if ($salt && $mode2) {
return "MODE2:" . hash('sha256', $salt . $pass);
} else if ($salt) {
return "SHA1X:" . sha1("$salt:$pass");
} else {
return "SHA1:" . sha1($pass);
}
} // function encrypt_password
function load_filters($feed_id, $owner_uid) {
$filters = array();
$cat_id = (int)Feeds::getFeedCategory($feed_id);
if ($cat_id == 0)
$null_cat_qpart = "cat_id IS NULL OR";
else
$null_cat_qpart = "";
$result = db_query("SELECT * FROM ttrss_filters2 WHERE
owner_uid = $owner_uid AND enabled = true ORDER BY order_id, title");
$check_cats = array_merge(
Feeds::getParentCategories($cat_id, $owner_uid),
[$cat_id]);
$check_cats_str = join(",", $check_cats);
$check_cats_fullids = array_map(function($a) { return "CAT:$a"; }, $check_cats);
while ($line = db_fetch_assoc($result)) {
$filter_id = $line["id"];
$match_any_rule = sql_bool_to_bool($line["match_any_rule"]);
$result2 = db_query("SELECT
r.reg_exp, r.inverse, r.feed_id, r.cat_id, r.cat_filter, r.match_on, t.name AS type_name
FROM ttrss_filters2_rules AS r,
ttrss_filter_types AS t
WHERE
(match_on IS NOT NULL OR
(($null_cat_qpart (cat_id IS NULL AND cat_filter = false) OR cat_id IN ($check_cats_str)) AND
(feed_id IS NULL OR feed_id = '$feed_id'))) AND
filter_type = t.id AND filter_id = '$filter_id'");
$rules = array();
$actions = array();
while ($rule_line = db_fetch_assoc($result2)) {
# print_r($rule_line);
if ($rule_line["match_on"]) {
$match_on = json_decode($rule_line["match_on"], true);
if (in_array("0", $match_on) || in_array($feed_id, $match_on) || count(array_intersect($check_cats_fullids, $match_on)) > 0) {
$rule = array();
$rule["reg_exp"] = $rule_line["reg_exp"];
$rule["type"] = $rule_line["type_name"];
$rule["inverse"] = sql_bool_to_bool($rule_line["inverse"]);
array_push($rules, $rule);
} else if (!$match_any_rule) {
// this filter contains a rule that doesn't match to this feed/category combination
// thus filter has to be rejected
$rules = [];
break;
}
} else {
$rule = array();
$rule["reg_exp"] = $rule_line["reg_exp"];
$rule["type"] = $rule_line["type_name"];
$rule["inverse"] = sql_bool_to_bool($rule_line["inverse"]);
array_push($rules, $rule);
}
}
if (count($rules) > 0) {
$result2 = db_query("SELECT a.action_param,t.name AS type_name
FROM ttrss_filters2_actions AS a,
ttrss_filter_actions AS t
WHERE
action_id = t.id AND filter_id = '$filter_id'");
while ($action_line = db_fetch_assoc($result2)) {
# print_r($action_line);
$action = array();
$action["type"] = $action_line["type_name"];
$action["param"] = $action_line["action_param"];
array_push($actions, $action);
}
}
$filter = array();
$filter["match_any_rule"] = sql_bool_to_bool($line["match_any_rule"]);
$filter["inverse"] = sql_bool_to_bool($line["inverse"]);
$filter["rules"] = $rules;
$filter["actions"] = $actions;
if (count($rules) > 0 && count($actions) > 0) {
array_push($filters, $filter);
}
}
return $filters;
}
function get_score_pic($score) {
if ($score > 100) {
return "score_high.png";
} else if ($score > 0) {
return "score_half_high.png";
} else if ($score < -100) {
return "score_low.png";
} else if ($score < 0) {
return "score_half_low.png";
} else {
return "score_neutral.png";
}
}
function feed_has_icon($id) {
return is_file(ICONS_DIR . "/$id.ico") && filesize(ICONS_DIR . "/$id.ico") > 0;
}
function init_plugins() {
PluginHost::getInstance()->load(PLUGINS, PluginHost::KIND_ALL);
return true;
}
function add_feed_category($feed_cat, $parent_cat_id = false) {
if (!$feed_cat) return false;
db_query("BEGIN");
if ($parent_cat_id) {
$parent_qpart = "parent_cat = '$parent_cat_id'";
$parent_insert = "'$parent_cat_id'";
} else {
$parent_qpart = "parent_cat IS NULL";
$parent_insert = "NULL";
}
$feed_cat = mb_substr($feed_cat, 0, 250);
$result = db_query(
"SELECT id FROM ttrss_feed_categories
WHERE $parent_qpart AND title = '$feed_cat' AND owner_uid = ".$_SESSION["uid"]);
if (db_num_rows($result) == 0) {
$result = db_query(
"INSERT INTO ttrss_feed_categories (owner_uid,title,parent_cat)
VALUES ('".$_SESSION["uid"]."', '$feed_cat', $parent_insert)");
db_query("COMMIT");
return true;
}
return false;
}
/**
* Fixes incomplete URLs by prepending "http://".
* Also replaces feed:// with http://, and
* prepends a trailing slash if the url is a domain name only.
*
* @param string $url Possibly incomplete URL
*
* @return string Fixed URL.
*/
function fix_url($url) {
// support schema-less urls
if (strpos($url, '//') === 0) {
$url = 'https:' . $url;
}
if (strpos($url, '://') === false) {
$url = 'http://' . $url;
} else if (substr($url, 0, 5) == 'feed:') {
$url = 'http:' . substr($url, 5);
}
//prepend slash if the URL has no slash in it
// "http://www.example" -> "http://www.example/"
if (strpos($url, '/', strpos($url, ':') + 3) === false) {
$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 $url;
else
return '';
}
function validate_feed_url($url) {
$parts = parse_url($url);
return ($parts['scheme'] == 'http' || $parts['scheme'] == 'feed' || $parts['scheme'] == 'https');
}
/* function save_email_address($email) {
// FIXME: implement persistent storage of emails
if (!$_SESSION['stored_emails'])
$_SESSION['stored_emails'] = array();
if (!in_array($email, $_SESSION['stored_emails']))
array_push($_SESSION['stored_emails'], $email);
} */
function get_feed_access_key($feed_id, $is_cat, $owner_uid = false) {
if (!$owner_uid) $owner_uid = $_SESSION["uid"];
$sql_is_cat = bool_to_sql_bool($is_cat);
$result = db_query("SELECT access_key FROM ttrss_access_keys
WHERE feed_id = '$feed_id' AND is_cat = $sql_is_cat
AND owner_uid = " . $owner_uid);
if (db_num_rows($result) == 1) {
return db_fetch_result($result, 0, "access_key");
} else {
$key = db_escape_string(uniqid_short());
$result = db_query("INSERT INTO ttrss_access_keys
(access_key, feed_id, is_cat, owner_uid)
VALUES ('$key', '$feed_id', $sql_is_cat, '$owner_uid')");
return $key;
}
return false;
}
function get_feeds_from_html($url, $content)
{
$url = fix_url($url);
$baseUrl = substr($url, 0, strrpos($url, '/') + 1);
libxml_use_internal_errors(true);
$doc = new DOMDocument();
$doc->loadHTML($content);
$xpath = new DOMXPath($doc);
$entries = $xpath->query('/html/head/link[@rel="alternate" and '.
'(contains(@type,"rss") or contains(@type,"atom"))]|/html/head/link[@rel="feed"]');
$feedUrls = array();
foreach ($entries as $entry) {
if ($entry->hasAttribute('href')) {
$title = $entry->getAttribute('title');
if ($title == '') {
$title = $entry->getAttribute('type');
}
$feedUrl = rewrite_relative_url(
$baseUrl, $entry->getAttribute('href')
);
$feedUrls[$feedUrl] = $title;
}
}
return $feedUrls;
}
function is_html($content) {
return preg_match("/<html|DOCTYPE html/i", substr($content, 0, 100)) !== 0;
}
function url_is_html($url, $login = false, $pass = false) {
return is_html(fetch_file_contents($url, false, $login, $pass));
}
function build_url($parts) {
return $parts['scheme'] . "://" . $parts['host'] . $parts['path'];
}
function cleanup_url_path($path) {
$path = str_replace("/./", "/", $path);
$path = str_replace("//", "/", $path);
return $path;
}
/**
* Converts a (possibly) relative URL to a absolute one.
*
* @param string $url Base URL (i.e. from where the document is)
* @param string $rel_url Possibly relative URL in the document
*
* @return string Absolute URL
*/
function rewrite_relative_url($url, $rel_url) {
if (strpos($rel_url, "://") !== false) {
return $rel_url;
} else if (strpos($rel_url, "//") === 0) {
# protocol-relative URL (rare but they exist)
return $rel_url;
} else if (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;
$parts['path'] = cleanup_url_path($parts['path']);
return build_url($parts);
} else {
$parts = parse_url($url);
if (!isset($parts['path'])) {
$parts['path'] = '/';
}
$dir = $parts['path'];
if (substr($dir, -1) !== '/') {
$dir = dirname($parts['path']);
$dir !== '/' && $dir .= '/';
}
$parts['path'] = $dir . $rel_url;
$parts['path'] = cleanup_url_path($parts['path']);
return build_url($parts);
}
}
function cleanup_tags($days = 14, $limit = 1000) {
if (DB_TYPE == "pgsql") {
$interval_query = "date_updated < NOW() - INTERVAL '$days days'";
} else if (DB_TYPE == "mysql") {
$interval_query = "date_updated < DATE_SUB(NOW(), INTERVAL $days DAY)";
}
$tags_deleted = 0;
while ($limit > 0) {
$limit_part = 500;
$query = "SELECT ttrss_tags.id AS id
FROM ttrss_tags, ttrss_user_entries, ttrss_entries
WHERE post_int_id = int_id AND $interval_query AND
ref_id = ttrss_entries.id AND tag_cache != '' LIMIT $limit_part";
$result = db_query($query);
$ids = array();
while ($line = db_fetch_assoc($result)) {
array_push($ids, $line['id']);
}
if (count($ids) > 0) {
$ids = join(",", $ids);
$tmp_result = db_query("DELETE FROM ttrss_tags WHERE id IN ($ids)");
$tags_deleted += db_affected_rows($tmp_result);
} else {
break;
}
$limit -= $limit_part;
}
return $tags_deleted;
}
function print_user_stylesheet() {
$value = get_pref('USER_STYLESHEET');
if ($value) {
print "<style type=\"text/css\">";
print str_replace("<br/>", "\n", $value);
print "</style>";
}
}
function filter_to_sql($filter, $owner_uid) {
$query = array();
if (DB_TYPE == "pgsql")
$reg_qpart = "~";
else
$reg_qpart = "REGEXP";
foreach ($filter["rules"] AS $rule) {
$rule['reg_exp'] = str_replace('/', '\/', $rule["reg_exp"]);
$regexp_valid = preg_match('/' . $rule['reg_exp'] . '/',
$rule['reg_exp']) !== FALSE;
if ($regexp_valid) {
$rule['reg_exp'] = db_escape_string($rule['reg_exp']);
switch ($rule["type"]) {
case "title":
$qpart = "LOWER(ttrss_entries.title) $reg_qpart LOWER('".
$rule['reg_exp'] . "')";
break;
case "content":
$qpart = "LOWER(ttrss_entries.content) $reg_qpart LOWER('".
$rule['reg_exp'] . "')";
break;
case "both":
$qpart = "LOWER(ttrss_entries.title) $reg_qpart LOWER('".
$rule['reg_exp'] . "') OR LOWER(" .
"ttrss_entries.content) $reg_qpart LOWER('" . $rule['reg_exp'] . "')";
break;
case "tag":
$qpart = "LOWER(ttrss_user_entries.tag_cache) $reg_qpart LOWER('".
$rule['reg_exp'] . "')";
break;
case "link":
$qpart = "LOWER(ttrss_entries.link) $reg_qpart LOWER('".
$rule['reg_exp'] . "')";
break;
case "author":
$qpart = "LOWER(ttrss_entries.author) $reg_qpart LOWER('".
$rule['reg_exp'] . "')";
break;
}
if (isset($rule['inverse'])) $qpart = "NOT ($qpart)";
if (isset($rule["feed_id"]) && $rule["feed_id"] > 0) {
$qpart .= " AND feed_id = " . db_escape_string($rule["feed_id"]);
}
if (isset($rule["cat_id"])) {
if ($rule["cat_id"] > 0) {
$children = Feeds::getChildCategories($rule["cat_id"], $owner_uid);
array_push($children, $rule["cat_id"]);
$children = join(",", $children);
$cat_qpart = "cat_id IN ($children)";
} else {
$cat_qpart = "cat_id IS NULL";
}
$qpart .= " AND $cat_qpart";
}
$qpart .= " AND feed_id IS NOT NULL";
array_push($query, "($qpart)");
}
}
if (count($query) > 0) {
$fullquery = "(" . join($filter["match_any_rule"] ? "OR" : "AND", $query) . ")";
} else {
$fullquery = "(false)";
}
if ($filter['inverse']) $fullquery = "(NOT $fullquery)";
return $fullquery;
}
if (!function_exists('gzdecode')) {
function gzdecode($string) { // no support for 2nd argument
return file_get_contents('compress.zlib://data:who/cares;base64,'.
base64_encode($string));
}
}
function get_random_bytes($length) {
if (function_exists('openssl_random_pseudo_bytes')) {
return openssl_random_pseudo_bytes($length);
} else {
$output = "";
for ($i = 0; $i < $length; $i++)
$output .= chr(mt_rand(0, 255));
return $output;
}
}
function read_stdin() {
$fp = fopen("php://stdin", "r");
if ($fp) {
$line = trim(fgets($fp));
fclose($fp);
return $line;
}
return null;
}
function implements_interface($class, $interface) {
return in_array($interface, class_implements($class));
}
function get_minified_js($files) {
require_once 'lib/jshrink/Minifier.php';
$rv = '';
foreach ($files as $js) {
if (!isset($_GET['debug'])) {
$cached_file = CACHE_DIR . "/js/".basename($js).".js";
if (file_exists($cached_file) && is_readable($cached_file) && filemtime($cached_file) >= filemtime("js/$js.js")) {
list($header, $contents) = explode("\n", file_get_contents($cached_file), 2);
if ($header && $contents) {
list($htag, $hversion) = explode(":", $header);
if ($htag == "tt-rss" && $hversion == VERSION) {
$rv .= $contents;
continue;
}
}
}
$minified = JShrink\Minifier::minify(file_get_contents("js/$js.js"));
file_put_contents($cached_file, "tt-rss:" . VERSION . "\n" . $minified);
$rv .= $minified;
} else {
$rv .= file_get_contents("js/$js.js"); // no cache in debug mode
}
}
return $rv;
}
function calculate_dep_timestamp() {
$files = array_merge(glob("js/*.js"), glob("css/*.css"));
$max_ts = -1;
foreach ($files as $file) {
if (filemtime($file) > $max_ts) $max_ts = filemtime($file);
}
return $max_ts;
}
function T_js_decl($s1, $s2) {
if ($s1 && $s2) {
$s1 = preg_replace("/\n/", "", $s1);
$s2 = preg_replace("/\n/", "", $s2);
$s1 = preg_replace("/\"/", "\\\"", $s1);
$s2 = preg_replace("/\"/", "\\\"", $s2);
return "T_messages[\"$s1\"] = \"$s2\";\n";
}
}
function init_js_translations() {
print 'var T_messages = new Object();
function __(msg) {
if (T_messages[msg]) {
return T_messages[msg];
} else {
return msg;
}
}
function ngettext(msg1, msg2, n) {
return __((parseInt(n) > 1) ? msg2 : msg1);
}';
$l10n = _get_reader();
for ($i = 0; $i < $l10n->total; $i++) {
$orig = $l10n->get_original_string($i);
if(strpos($orig, "\000") !== FALSE) { // Plural forms
$key = explode(chr(0), $orig);
print T_js_decl($key[0], _ngettext($key[0], $key[1], 1)); // Singular
print T_js_decl($key[1], _ngettext($key[0], $key[1], 2)); // Plural
} else {
$translation = __($orig);
print T_js_decl($orig, $translation);
}
}
}
function get_theme_path($theme) {
$check = "themes/$theme";
if (file_exists($check)) return $check;
$check = "themes.local/$theme";
if (file_exists($check)) return $check;
}
function theme_valid($theme) {
$bundled_themes = [ "default.php", "night.css", "compact.css" ];
if (in_array($theme, $bundled_themes)) return true;
$file = "themes/" . basename($theme);
if (!file_exists($file)) $file = "themes.local/" . basename($theme);
if (file_exists($file) && is_readable($file)) {
$fh = fopen($file, "r");
if ($fh) {
$header = fgets($fh);
fclose($fh);
return strpos($header, "supports-version:" . VERSION_STATIC) !== FALSE;
}
}
return false;
}
/**
* @SuppressWarnings(unused)
*/
function error_json($code) {
require_once "errors.php";
@$message = $ERRORS[$code];
return json_encode(array("error" =>
array("code" => $code, "message" => $message)));
}
/*function abs_to_rel_path($dir) {
$tmp = str_replace(dirname(__DIR__), "", $dir);
if (strlen($tmp) > 0 && substr($tmp, 0, 1) == "/") $tmp = substr($tmp, 1);
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 "";
}
}
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