265 lines
7.4 KiB
PHP
265 lines
7.4 KiB
PHP
<?php
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class Updater {
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function handleCommand($command) {
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if (!self::isUserAlreadyLoggedInAndAdmin()) {
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echo json_encode(array("status" => "ERROR", "msg" => "Not authorized"));
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} else {
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$pdo = DbUtils::openDbAndReturnPdoStatic();
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if ($command == 'getAvailableVersion') {
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echo json_encode(self::getAvailableVersion($pdo));
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} else if ($command == 'updatecheck') {
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echo json_encode(self::updatecheck($pdo));
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} else if ($command == 'replace') {
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echo json_encode(self::replace($pdo,$_GET["fileindex"],$_GET["totalLines"]));
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}
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else {
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echo "Kommando nicht unterstuetzt.";
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}
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}
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}
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private static function isUserAlreadyLoggedInAndAdmin() {
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if(session_id() == '') {
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session_start();
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}
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if (!isset($_SESSION['angemeldet']) || !$_SESSION['angemeldet']) {
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return false;
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} else {
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return ($_SESSION['is_admin']);
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}
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}
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private static function getFile($url,$file,$asArray = false,$timeout = 200) {
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$ctx = stream_context_create(array('http' =>
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array(
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'timeout' => $timeout, // seconds
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)
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));
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$url = $url . "/downloader.php?file=" . $file;
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try {
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$infoFile = file_get_contents($url, false, $ctx);
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$test = substr($infoFile, 1,50);
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if ($infoFile != FALSE) {
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if ($asArray) {
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$retArr = array();
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$lines = explode("\n", $infoFile);
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foreach($lines as $aLine) {
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$l = trim($aLine);
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if ($l != '') {
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$retArr[] = $l;
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}
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}
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return array("status" => "OK","msg" => $retArr);
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} else {
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return array("status" => "OK","msg" => $infoFile);
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}
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} else {
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return array("status" => "ERROR","msg" => "File to replace not found ($url)");
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}
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} catch (Exception $ex) {
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return array("status" => "ERROR","msg" => $ex->getMessage());
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}
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}
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private static function getInfoFile($url,$file,$asArray = false,$timeout = 200) {
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$ctx = stream_context_create(array('http' =>
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array(
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'timeout' => $timeout, // seconds
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)
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));
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$url = $url . "/" . $file;
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try {
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$infoFile = @file_get_contents($url, false, $ctx);
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if ($infoFile != FALSE) {
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if ($asArray) {
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$retArr = array();
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$lines = explode("\n", $infoFile);
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if (count($lines) < 1) {
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return array("status" => "ERROR","msg" => "Info file not valid");
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}
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$versionMatch = '/^[0-9]*\.[0-9]*\.[0-9]*/';
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$ret = preg_match($versionMatch, $lines[0]);
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if ($ret == 0) {
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return array("status" => "ERROR","msg" => "Info file has no version info.");
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}
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foreach($lines as $aLine) {
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$l = trim($aLine);
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if ($l != '') {
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$retArr[] = $l;
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}
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}
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return array("status" => "OK","msg" => $retArr);
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} else {
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return array("status" => "OK","msg" => $infoFile);
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}
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} else {
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return array("status" => "ERROR","msg" => "File to replace not found ($url)");
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}
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} catch (Exception $ex) {
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return array("status" => "ERROR","msg" => $ex->getMessage());
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}
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}
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private static function getAvailableVersion($pdo) {
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$url = CommonUtils::getConfigValue($pdo, "updateurl", '');
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$installedVersion = CommonUtils::getConfigValue($pdo, "version", '');
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$infoFile = self::getInfoFile($url,'updateinfo.txt',true,3);
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if ($infoFile["status"] != "OK") {
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return array("status" => "ERROR","msg" => "could not get info file: " . $infoFile["msg"],"url" => $url);
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}
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$infoFileLines = $infoFile["msg"];
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if (count($infoFileLines) > 1) {
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$checkIfNewerVersion = self::isV2Newer($installedVersion,trim($infoFileLines[0]));
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return array("status" => "OK","msg" => $infoFileLines[0],"url" => $url,"neweravailable" => ($checkIfNewerVersion ? 1 : 0));
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} else {
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return array("status" => "ERROR","msg" => "Info file not valid","url" => $url);
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}
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}
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private static function isV2Newer($v1,$v2) {
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if (is_null($v1) || is_null($v2)) {
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return false;
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}
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$v1key = self::genVerKey($v1);
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$v2key = self::genVerKey($v2);
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if (is_null($v1key) || is_null($v2key)) {
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return false;
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}
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if ($v1key < $v2key) {
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return true;
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} else {
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return false;
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}
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}
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private static function genVerKey($v) {
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$vparts = explode('.',$v);
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$len = count($vparts);
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$key = 0;
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try {
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for ($i=0;$i<$len;$i++) {
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$key += intval($vparts[$i]) * pow(1000,2-$i);
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}
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return $key;
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} catch (Exception $e) {
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return null;
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}
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}
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private static function doCheck($lineArr) {
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if (count($lineArr) < 2) {
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return array("status" => "OK","msg" => '');
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}
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for ($i=1;$i<count($lineArr);$i++) {
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if (trim($lineArr[$i]) == '') {
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continue;
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}
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$aLine = "../" . $lineArr[$i];
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$basename = basename($aLine);
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$dirname = dirname($aLine);
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$isDirExists = file_exists($dirname);
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if (!$isDirExists) {
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$ret = self::createSubDir($dirname);
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if ($ret["status"] != "OK") {
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return $ret;
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}
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}
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$isFileExists = file_exists($aLine);
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$isDirWritable = is_writable($dirname);
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$isFileWritable = is_writable($aLine);
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if ($isFileExists) {
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if (!$isFileWritable) {
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return array("status" => "ERROR","msg" => $aLine . " cannot be overwritten");
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}
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} else {
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// file does not exist, but can it be created?
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if (!$isDirWritable) {
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return array("status" => "ERROR","msg" => $basename . " cannot be written into $dirname with this path: " . $aLine);
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}
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}
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}
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return array("status" => "OK","msg" => "");
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}
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private static function createSubDir($dirname) {
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if (!is_writable("/..")) {
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return array("status" => "ERROR","msg" => "Root directory not writable. But this is necessary to create and delete install directory.");
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}
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if (!file_exists($dirname)) {
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if (!mkdir($dirname, 0777)) {
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return array("status" => "ERROR","msg" => "$dirname directory could not be created.");
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}
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} else {
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if (!is_writable($dirname)) {
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return array("status" => "ERROR","msg" => "Cannot write into $dirname directory.");
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}
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}
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return array("status" => "OK");
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}
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public static function updatecheck($pdo) {
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$url = CommonUtils::getConfigValue($pdo, "updateurl", '');
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$infoFile = self::getInfoFile($url,'updateinfo.txt',true,3);
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if ($infoFile["status"] != "OK") {
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return array("status" => "ERROR","msg" => "could not get info file: " . $infoFile["msg"]);
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}
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$infoFileLines = $infoFile["msg"];
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$check = self::doCheck($infoFileLines);
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if ($check["status"] != "OK") {
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$ret = array("status" => "ERROR","msg" => "Check returned: " . $check["msg"]);
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} else {
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$ret = array("status" => "OK","msg" => $infoFileLines);
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}
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return $ret;
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}
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public static function replace($pdo,$fileindex,$totallines) {
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$url = CommonUtils::getConfigValue($pdo, "updateurl", '');
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$infoFile = self::getInfoFile($url,'updateinfo.txt',true,3);
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if ($infoFile["status"] != "OK") {
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return array("status" => "ERROR","msg" => "could not get file: " . $infoFile["msg"]);
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}
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$lineArr = $infoFile["msg"];
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try {
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$fileToRead = $lineArr[intval($fileindex) + 1];
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if (trim($fileToRead) != '') {
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$targetFile = "../" . $fileToRead;
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$fileContent = self::getFile($url, $fileToRead);
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if ($fileContent["status"] == "OK") {
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file_put_contents($targetFile, $fileContent["msg"]);
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} else {
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return array("status" => "ERROR","msg" => "$targetFile cannot be fetched from update server.");
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}
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}
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} catch (Exception $ex) {
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return array("status" => "ERROR","msg" => $ex->getMessage());
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}
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return array("status" => "OK","msg" => array("index" => $fileindex,"file" => $fileToRead,"totalLines" => $totallines));
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}
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}
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