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index.php
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<?php
/*********************************************************/
/* RPi Monitor Dashboard */
/* https://github.com/nekromoff/rpi-monitor-dashboard */
/* Copyright (c) 2024+ Daniel Duris, [email protected] */
/* License: MIT */
/* Version: 3.0 */
/*********************************************************/
const REPORT_PY_URL = 'https://raw.githubusercontent.com/nekromoff/rpi-monitor-dashboard/main/report.py';
$config = [];
require 'config.php';
// set default reporting interval to 1 hour
if (!isset($config['interval'])) {
$config['interval'] = 3600;
}
date_default_timezone_set($config['timezone']);
// Check Github main branch for latest Python code version
$latest_code_filename = '_report_py.latest';
// Check CRC32 hash of the latest code once a day
if (!file_exists('logs/' . $latest_code_filename) or filemtime('logs/' . $latest_code_filename) <= time() - 86400) {
$latest_code = file_get_contents(REPORT_PY_URL);
if (strlen($latest_code)) {
file_put_contents('logs/' . $latest_code_filename, $latest_code);
}
}
$crc32 = crc32(file_get_contents('logs/' . $latest_code_filename));
if ($_SERVER['REQUEST_METHOD'] == 'HEAD') {
// [0 => config update, 1 => one-time commands, 2 => python script code update]
$available_updates = [0, 0, 0];
// Handle config update check
if (isset(getallheaders()['X-Hostname'])) {
$filename = 'logs/' . md5(getallheaders()['X-Hostname']) . '_new.config';
}
if ((isset($filename) and file_exists($filename)) or file_exists('logs/_new.config')) {
$available_updates[0] = '1';
}
unset($filename);
// Handle one-time commands update check
if (isset(getallheaders()['X-Hostname'])) {
$filename = 'logs/' . md5(getallheaders()['X-Hostname']) . '_new.onetime';
}
if ((isset($filename) and file_exists($filename)) or file_exists('logs/_new.onetime')) {
$available_updates[1] = '1';
}
// Handle python script update check
if (isset(getallheaders()['X-Crc32']) and getallheaders()['X-Crc32'] != $crc32) {
$available_updates[2] = '1';
}
$available_updates = implode('', $available_updates);
if ((int) $available_updates) {
header('HTTP/1.1 200 OK');
header('X-Update: ' . $available_updates);
}
exit;
}
$display_dashboard = false;
if ($_SERVER['REQUEST_METHOD'] == 'POST') {
// Handle uploads and receive data
if (isset($_POST) and isset($_POST['new_config'])) {
// save new config
if (isset($_POST['all']) and $_POST['all'] == 1) {
file_put_contents('logs/_new.config', $_POST['new_config']);
} else {
file_put_contents('logs/' . md5($_POST['hostname']) . '_new.config', $_POST['new_config']);
}
$display_dashboard = true;
} elseif (isset($_POST) and isset($_POST['new_onetime'])) {
// save new config
if (isset($_POST['all']) and $_POST['all'] == 1) {
file_put_contents('logs/_new.onetime', $_POST['new_onetime']);
} else {
file_put_contents('logs/' . md5($_POST['hostname']) . '_new.onetime', $_POST['new_onetime']);
}
$display_dashboard = true;
} elseif (isset($_FILES) and isset($_FILES['screenshot']['name'])) {
// Handle image upload
$filename = pathinfo($_FILES['screenshot']['name'])['filename'];
if (move_uploaded_file($_FILES['screenshot']['tmp_name'], 'logs/' . md5($filename) . '.png')) {
header('HTTP/1.1 200 OK');
} else {
header('HTTP/1.1 401 Unauthorized');
}
exit;
} else {
// receive data
header('HTTP/1.1 200 OK');
$content = json_decode(file_get_contents('php://input'));
if (isset($content->hostname) and isset($content->_config)) {
file_put_contents('logs/' . md5($content->hostname) . '.config', $content->_config);
}
unset($content->_config);
if (isset($content->hostname)) {
file_put_contents('logs/' . md5($content->hostname) . '.log', json_encode($content));
echo '{"status":"OK"}';
} else {
echo '{"status":"Missing identifier"}';
}
exit;
}
}
if ($_SERVER['REQUEST_METHOD'] == 'GET' or $display_dashboard === true) {
// Handle authentication, dashboard and configuration update for remotes
if (isset($_GET['update'])) {
if ($_GET['update'] == 1) {
$filename = '_new.config';
} elseif ($_GET['update'] == 2) {
$filename = '_new.onetime';
} elseif ($_GET['update'] == 3) {
$filename = $latest_code_filename;
}
// Send update to remote devices
if (file_exists('logs/' . $filename)) {
// count, if all remotes retrieved updated config
$file = file_get_contents('logs/' . $filename);
$counter_file = 'logs/' . str_replace('.', '_', $filename) . '.count';
$count = 1;
if (file_exists($counter_file)) {
$counter = fopen($counter_file, 'r+');
flock($counter, LOCK_EX);
$count = trim(fread($counter, filesize($counter_file)));
$count++;
rewind($counter);
fwrite($counter, $count);
flock($counter, LOCK_UN);
fclose($counter);
} else {
$counter = fopen($counter_file, 'w');
flock($counter, LOCK_EX);
fwrite($counter, $count);
flock($counter, LOCK_UN);
fclose($counter);
}
// delete new config once retrieved by all remotes
if (count(glob('logs/*.log')) == $count) {
unlink('logs/' . $filename);
unlink($counter_file);
}
}
// not elseif, we can have both update for all and an individual update that overrides all device update
if (isset(getallheaders()['X-Hostname']) and file_exists('logs/' . md5(getallheaders()['X-Hostname']) . $filename)) {
$file = file_get_contents('logs/' . md5(getallheaders()['X-Hostname']) . $filename);
unlink('logs/' . md5(getallheaders()['X-Hostname']) . $filename);
}
echo $file;
exit;
}
if (isset($_GET['cancel'])) {
// cancel config update
if ($_GET['cancel'] == 1) {
if (isset($_GET['hostname']) and file_exists('logs/' . md5($_GET['hostname']) . '_new.config')) {
unlink('logs/' . md5($_GET['hostname']) . '_new.config');
$flash = 'ℹ️ Config update canceled.';
} elseif (file_exists('logs/_new.config')) {
unlink('logs/_new.config');
$flash = 'ℹ️ Config update canceled for all devices.';
}
} elseif ($_GET['cancel'] == 2) {
if (isset($_GET['hostname']) and file_exists('logs/' . md5($_GET['hostname']) . '_new.onetime')) {
unlink('logs/' . md5($_GET['hostname']) . '_new.onetime');
$flash = 'ℹ️ One-time commands canceled.';
} elseif (file_exists('logs/_new.onetime')) {
unlink('logs/_new.onetime');
$flash = 'ℹ️ One-time commands canceled for all devices.';
}
}
}
// Assume user is authenticated, unless auth is configured and digest tells you otherwise
$authenticated = true;
if ($config['username'] and $config['password']) {
// Handle Digest authentication, if user/pass configured
$realm = 'RPi Monitor Dashboard';
if (empty($_SERVER['PHP_AUTH_DIGEST'])) {
header('HTTP/1.1 401 Unauthorized');
header('WWW-Authenticate: Digest realm="' . $realm . '",qop="auth",algorithm=SHA-256,nonce="' . uniqid() . '",opaque="' . hash('sha256', $realm) . '"');
$error = '<h1>Not authorized. Enter username and password to login.</h1>';
$authenticated = false;
} elseif (!($data = http_digest_parse($_SERVER['PHP_AUTH_DIGEST'])) or $data['username'] != $config['username']) {
$error = '<h1>Incorrect login details.</h1>';
$authenticated = false;
}
if (isset($data['response'])) {
$hash1 = hash('sha256', $data['username'] . ':' . $realm . ':' . $config['password']);
$hash2 = hash('sha256', $_SERVER['REQUEST_METHOD'] . ':' . $data['uri']);
$valid_response = hash('sha256', $hash1 . ':' . $data['nonce'] . ':' . $data['nc'] . ':' . $data['cnonce'] . ':' . $data['qop'] . ':' . $hash2);
if ($data['response'] != $valid_response) {
$error = '<h1>Incorrect login details.</h1>';
$authenticated = false;
}
}
}
echo '<!doctype html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width,initial-scale=1" /><title>RPi Monitor Dashboard</title><style>
* { margin: 0; padding: 0; }
body { font-family: system-ui, sans-serif; padding: 1em; }
figure { padding: 1em; font-weight: bold; background: #FFF; }
main { display: flex; flex-direction: row; flex-wrap: wrap; }
section { width: calc(33vw - 3em - 2px); padding:1em; border:1px dashed #000; background: #8BF8C0; }
h3 { margin-top:0.5em; margin-bottom:0.2em; }
img { width: 100%; }
details { border: 1px solid rgba(255,255,255,0);}
summary { cursor:pointer; padding: 0.5em; }
details[open] { border: 1px dotted #000; }
textarea { width:calc(100% - 2em); padding: 0.5em; display: block; margin: 0 auto; resize: vertical; }
input[type=submit] { margin-top: 1em; width:100%; height:2em; font-size: 120%; background: #000; color: #fff; border-width: 1px; cursor: pointer; }
input[type=submit]:hover { background: #fff; color: #000; font-weight: bold; }
label { cursor:pointer; }
button { padding: 0 0.5em; font-size: 120%; background: #fff; color: #000; border-width: 1px; cursor: pointer; }
button:hover { background: #000; color: #fff; font-weight: bold; }
@media (max-width: 800px) { main {flex-direction: column;} section { width: calc(100vw - 4em - 2px); } }
.warning { background: #FFD6DA; }
.error { background: #FFAFB0; }
</style></head><body>';
if ($authenticated === true) {
// Display dashboard, if auth check passed
echo '<h1>RPi Monitor Dashboard</h1>';
if (file_exists('logs/_new.config')) {
echo '<figure class="warning">⚠️ New configuration will be applied on next contact to all devices. <a href="./?cancel=1"><button>Cancel</button></a><details><summary>Config</summary><textarea name="new_config" rows="10">' . file_get_contents('logs/_new.config') . '</textarea></details></figure>';
}
if (file_exists('logs/_new.onetime')) {
echo '<figure class="warning">⚠️ New one-time commands will be applied on next contact to all devices. <a href="./?cancel=2"><button>Cancel</button></a><details><summary>One-time commands</summary><textarea name="onetime" rows="10">' . file_get_contents('logs/_new.onetime') . '</textarea></details></figure>';
}
if (isset($flash) and !isset($_GET['hostname'])) {
echo '<figure>' . $flash . '</figure>';
}
echo '<main>';
foreach (glob('logs/*.log') as $log) {
$modified_time = filemtime($log);
$content = file_get_contents($log);
$content = json_decode($content);
echo '<section';
// display red background for devices that have not received update longer than reporting interval
if ($modified_time < time() - $config['interval']) {
echo ' class="error"';
}
echo '>';
if (isset($flash) and isset($_GET['hostname']) and $_GET['hostname'] == $content->hostname) {
echo '<figure>' . $flash . '</figure>';
}
if (file_exists('logs/' . md5($content->hostname) . '_new.config')) {
echo '<figure class="warning">⚠️ New configuration will be applied on next contact. <a href="./?cancel=1&hostname=' . urlencode($content->hostname) . '"><button>Cancel</button></a><details><summary>Config</summary><textarea name="new_config" rows="10">' . file_get_contents('logs/' . md5($content->hostname) . '_new.config') . '</textarea></details></figure>';
}
if (file_exists('logs/' . md5($content->hostname) . '_new.onetime')) {
echo '<figure class="warning">⚠️ One-time commands will be applied on next contact. <a href="./?cancel=2&hostname=' . urlencode($content->hostname) . '"><button>Cancel</button></a><details><summary>One-time commands</summary><textarea name="onetime" rows="10">' . file_get_contents('logs/' . md5($content->hostname) . '_new.onetime') . '</textarea></details></figure>';
}
echo 'Last update: ' . date('F d Y H:i:s', $modified_time);
$config_filename = str_ireplace('.log', '.config', $log);
if (file_exists($config_filename)) {
$cleaned_config = stripReceiverFromTOMLConfig(file_get_contents($config_filename));
echo '<details><summary>Config</summary><form method="post" action="./"><textarea name="new_config" rows="10">' . $cleaned_config . '</textarea><input type="checkbox" name="all" id="all' . md5($content->hostname) . '" value="1"><label for="all' . md5($content->hostname) . '"> Apply to all</label><input type="hidden" name="hostname" value="' . $content->hostname . '"><input type="submit" value="Save config"></form></details>';
}
$onetime_filename = str_ireplace('.log', '.onetime', $log);
$onetime = '';
if (file_exists($onetime_filename)) {
$onetime = file_get_contents($onetime_filename);
}
echo '<details><summary>One-time commands</summary><form method="post" action="./"><textarea name="new_onetime" rows="10">' . $onetime . '</textarea><input type="checkbox" name="all" id="onetimeall' . md5($content->hostname) . '" value="1"><label for="onetimeall' . md5($content->hostname) . '"> Apply to all</label><input type="hidden" name="hostname" value="' . $content->hostname . '"><input type="submit" value="Save commands"></form></details>';
echo '<h2>' . $content->hostname . '</h2>';
$screenshot = str_ireplace('.log', '.png', $log);
if (file_exists($screenshot)) {
echo '<a href="' . $screenshot . '" title="Open fullsize image"><img src="' . $screenshot . '" alt="' . $content->hostname . ' screenshot"></a>';
}
unset($content->hostname);
echo '<table>';
foreach ($content as $key => $item) {
echo '<tr><td>';
echo '<h3>' . $key . '</h3>';
echo nl2br($item, false);
echo '</td></tr>';
}
echo '</table>';
echo '</section>';
}
echo '</main>';
} else {
echo $error;
}
echo '</body></html>';
}
// HTTP Digest authentication parser
// see: https://www.php.net/manual/en/features.http-auth.php
function http_digest_parse($txt)
{
// protect against missing data
$needed_parts = ['nonce' => 1, 'nc' => 1, 'cnonce' => 1, 'qop' => 1, 'username' => 1, 'uri' => 1, 'response' => 1];
$data = [];
$keys = implode('|', array_keys($needed_parts));
preg_match_all('@(' . $keys . ')=(?:([\'"])([^\2]+?)\2|([^\s,]+))@', $txt, $matches, PREG_SET_ORDER);
foreach ($matches as $m) {
$data[$m[1]] = $m[3] ? $m[3] : $m[4];
unset($needed_parts[$m[1]]);
}
return $needed_parts ? false : $data;
}
function stripReceiverFromTOMLConfig($config)
{
$cleaned_config = '';
$config_lines = explode("\n", $config);
foreach ($config_lines as $key => $line) {
if (stripos($line, '#-#*+*#-#') !== false) {
$offset_key = $key + 1;
}
if (isset($offset_key) and $key >= $offset_key) {
$cleaned_config .= $line . "\n";
}
}
return $cleaned_config;
}