opensmtpdadmin/backup.php

<?php
// 
// OpenSMTPD Admin 
// by Mischa Peters <mischa at high5 dot nl>
// Copyright (c) 2022 High5!
// License Info: LICENSE.TXT
//
// File: backup.php
//
// Template File: -none-
//
// Template Variables:
//
// -none-
//
// POST / GET Variables:
//
// -none-
//
require_once './functions.inc.php';
include './languages/' . check_language() . '.lang';
date_default_timezone_set('Europe/Amsterdam');

$SESSID_USERNAME = check_session();
$ROLE = check_role($SESSID_USERNAME);

if ($ROLE != ADMIN_ROLE) {
	header("Location: list-domain.php");
	die();;
}

if ($_SERVER['REQUEST_METHOD'] == "GET") {
	umask(077);
	$filename = "opensmtpadmin-" . date("Ymd") . "-" . getmypid() . ".sql";
	$backup = "/tmp/" . $filename;
	$header = "#\n# OpenSMTPD Admin " . VERSION . "\n# Date: " . date("D M j G:i:s T Y") . "\n#\n";
	$tables = array('admin','alias','domain','domain_admins','log','mailbox','vacation');

	if (!$fh = fopen($backup, 'w')) {
		$message = "<div class=\"error_msg\">Cannot open file ($backup)</div>";
	}

	if (empty($message)) {
		fwrite($fh, $header);
		$dbh = pdo_connect();
		foreach ($tables as $table) {
			$sth = $dbh->query("SHOW CREATE TABLE $table");
			$row = $sth->fetch(PDO::FETCH_ASSOC);
			fwrite ($fh, $row['Create Table']. "\n\n");
		}
		foreach ($tables as $table) {
			$sth = $dbh->query("SELECT * FROM $table");
			while ($row = $sth->fetch(PDO::FETCH_ASSOC)) {
				foreach ($row as $k => $v) {
					$keys[] = $k;
					$values[] = $v;
				}
				fwrite($fh, "INSERT INTO ". $table . " (". implode (',',$keys) . ") VALUES ('" . implode ('\',\'',$values) . "')\n");
				$keys = array();
				$values = array();
			}
		}
		header("Content-Type: application/octet-stream");
		header("Content-Disposition: attachment; filename=\"$filename\"");
		header("Content-Transfer-Encoding: binary");
		header("Content-Length: " . filesize("$backup"));
		header("Content-Description: OpenSMTPD Admin");
		$download_backup = fopen("$backup", "r");
		unlink("$backup");
		fpassthru($download_backup);
	} else {
		include './templates/header.tpl';
		include './templates/menu.tpl';
		include './templates/message.tpl';
		include './templates/footer.tpl';
	}
}
?>