Serv00服务器经常出现删除cron现象，通过外部SSH访问重设比较麻烦，同一个IP对多服务器SSH访问，还可能会被批量查封。
可以借用web进行应用保活，简单又安全，方法如下：
替换public_html目录下的默认主页
删除/home/${YOURNAME}/domains/${YOURNAME}.serv00.net/public_html目录下的index.html，增加:
index.php：
<?php
// 引入配置文件
$config = include 'config.php';
// 日志文件路径
$logFile = 'log/access.log';
// Nginx 默认页面 HTML 内容
$nginxDefaultHtml = <<<HTML
<!DOCTYPE html>
<html>
<head>
<title>Welcome to nginx!</title>
<style>
body {
width: 35em;
margin: 0 auto;
font-family: Tahoma, Verdana, Arial, sans-serif;
}
</style>
</head>
<body>
<h1>Welcome to nginx!</h1>
<p>If you see this page, the nginx web server is successfully installed and
working. Further configuration is required.</p>
<p>For online documentation and support please refer to
<a href="http://nginx.org/">nginx.org</a>.<br/>
Commercial support is available at
<a href="http://nginx.com/">nginx.com</a>.</p>
<p><em>Thank you for using nginx.</em></p>
</body>
</html>
HTML;
// 确保 log 目录存在
if (!is_dir('log')) {
mkdir('log', 0777, true); // 创建目录，允许所有用户读写执行
}
// 获取请求路径 (从 GET 参数中获取)
$requestPath = $_GET['path'] ?? '';
// 记录访问日志
$logMessage = date('Y-m-d H:i:s') . " - Access: " . ($requestPath ? '?path=' . $requestPath : 'Direct Access') . "\n";
file_put_contents($logFile, $logMessage, FILE_APPEND);
// 移除多余的斜杠
$requestPath = trim($requestPath, '/');
// 添加前导斜杠，使其与配置文件中的路由匹配
if ($requestPath !== '') {
$requestPath = '/' . $requestPath;
}
// 查找匹配的配置项
$action = null;
foreach ($config['routes'] as $route => $actionConfig) {
if ($route === $requestPath) {
$action = $actionConfig;
break;
}
}
if ($action) {
// 执行对应操作
switch ($action['type']) {
case 'command':
$command = $action['command'];
$logMessage = date('Y-m-d H:i:s') . " - Executing command: " . $command . "\n";
file_put_contents($logFile, $logMessage, FILE_APPEND);
// 执行命令并获取输出
$output = shell_exec($command . ' 2>&1'); // 2>&1 将标准错误重定向到标准输出
$logMessage = date('Y-m-d H:i:s') . " - Command output: " . $output . "\n";
file_put_contents($logFile, $logMessage, FILE_APPEND);
echo "<pre>" . htmlspecialchars($output) . "</pre>"; // 使用 <pre> 标签保持格式，并进行HTML转义
break;
case 'static':
$filePath = $action['file'];
if (is_dir($filePath)) {
// 目录托管
$requestedFile = realpath($filePath . '/' . ltrim($requestPath, '/')); // 确保在目录内
$logMessage = date('Y-m-d H:i:s') . " - Serving static directory: " . $filePath . ", Requested file: " . $requestedFile . "\n";
file_put_contents($logFile, $logMessage, FILE_APPEND);
if ($requestedFile && strpos($requestedFile, realpath($filePath)) === 0 && file_exists($requestedFile) && is_readable($requestedFile)) { // 安全检查
// 根据文件类型设置 Content-Type
$fileExtension = pathinfo($requestedFile, PATHINFO_EXTENSION);
$contentType = getContentType($fileExtension); // 使用函数获取 Content-Type
header('Content-Type: ' . $contentType);
readfile($requestedFile);
} else {
header("HTTP/1.0 404 Not Found");
echo "<h1>404 Not Found</h1>";
$logMessage = date('Y-m-d H:i:s') . " - Static file not found: " . $filePath . '/' . ltrim($requestPath, '/') . "\n";
file_put_contents($logFile, $logMessage, FILE_APPEND);
}
} elseif (file_exists($filePath) && is_readable($filePath)) {
// 单个文件
$logMessage = date('Y-m-d H:i:s') . " - Serving static file: " . $filePath . "\n";
file_put_contents($logFile, $logMessage, FILE_APPEND);
// 根据文件类型设置 Content-Type
$fileExtension = pathinfo($filePath, PATHINFO_EXTENSION);
$contentType = getContentType($fileExtension); // 使用函数获取 Content-Type
header('Content-Type: ' . $contentType);
readfile($filePath);
} else {
header("HTTP/1.0 404 Not Found");
echo "<h1>404 Not Found</h1>";
$logMessage = date('Y-m-d H:i:s') . " - Static file not found: " . $filePath . "\n";
file_put_contents($logFile, $logMessage, FILE_APPEND);
}
break;
default:
header("HTTP/1.0 500 Internal Server Error");
echo "<h1>500 Internal Server Error</h1><p>Invalid action type.</p>";
$logMessage = date('Y-m-d H:i:s') . " - Invalid action type: " . $action['type'] . "\n";
file_put_contents($logFile, $logMessage, FILE_APPEND);
break;
}
} else {
// 未找到匹配的路由，返回 Nginx 默认页面
header('Content-Type: text/html');
echo $nginxDefaultHtml;
$logMessage = date('Y-m-d H:i:s') . " - Route not found, serving Nginx default page.\n";
file_put_contents($logFile, $logMessage, FILE_APPEND);
}
/**
* 根据文件扩展名获取 Content-Type
* @param string $extension
* @return string
*/
function getContentType(string $extension): string {
$mimeTypes = [
'html' => 'text/html',
'css' => 'text/css',
'js' => 'text/javascript',
'json' => 'application/json',
'xml' => 'application/xml',
'txt' => 'text/plain',
'jpg' => 'image/jpeg',
'jpeg' => 'image/jpeg',
'png' => 'image/png',
'gif' => 'image/gif',
'svg' => 'image/svg+xml',
// 添加更多 mime 类型
];
return $mimeTypes[$extension] ?? 'application/octet-stream'; // 默认
}
?>
config.php:
<?php
return [
'routes' => [
'/status' => [
'type' => 'command',
'command' => 'uptime'
],
'/diskspace' => [
'type' => 'command',
'command' => 'df -h'
],
'/cron' => [
'type' => 'command',
'command' => 'bash ./your_check_cron_shell.sh'
],
'/installcron' => [
'type' => 'command',
'command' => '(crontab -l 2>/dev/null; echo "00 08 * * 6 ${your_command} > /dev/null 2>&1") | crontab -'
],
'/back.html' => [
'type' => 'static',
'file' => 'your.html' // 单个文件
]
]
];
按需修改上面的配置文件对应的脚本或命令，尽情发挥。