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LibrePilot/ground/usagetracker/backend/usagetracker.php
Roy Bekken b6b7adcbdb GCS: Add backend for usagetracker.
Collect statistics about the usage of our software and hardware
     to enable us to make things better for you.
2015-09-23 17:10:01 +02:00

82 lines
1.9 KiB
PHP

<?php
if (!$_SERVER['REQUEST_METHOD'] === 'GET' || empty($_GET['hash'])) {
usage_error();
}
// NOTE: $hash not sanitized because of the checksum match test.
$hash = $_GET['hash'];
$string = str_replace('&hash=' . $hash, '', rawurldecode($_SERVER['QUERY_STRING']));
if ($hash != md5($string)) {
usage_error();
}
$dbhost = 'localhost';
$dbname = '';
$dbpasswd = '';
$dbuser = '';
$db = new mysqli($dbhost, $dbuser, $dbpasswd, $dbname);
unset($dbhost, $dbuser, $dbpasswd, $dbname);
if ($db->connect_error) {
die();
}
$sql = sprintf("SELECT id, last_date FROM usagetracker WHERE hash = '%s' LIMIT 1",
$db->real_escape_string($hash)
);
$res = $db->query($sql);
if ($res->num_rows > 0) {
// Shouldn't normally be here but happens if GCS settings are reset
// or if the request come from another source than GCS.
$hashUpdate = $res->fetch_assoc();
if ($hashUpdate['last_date'] < (time() - 3600)) {
// Update timestamp and connection count.
$sql = sprintf("UPDATE usagetracker SET last_date = %u, count = count + 1 WHERE id = %u LIMIT 1",
time(),
$hashUpdate['id']
);
$db->query($sql);
}
}
else {
// New hash
$sql = sprintf("INSERT INTO usagetracker (first_date, last_date, ip, data, hash)
VALUES (%u, %u, '%s', '%s', '%s')",
time(),
time(),
encode_ip($_SERVER['REMOTE_ADDR']),
$db->real_escape_string($string),
$db->real_escape_string($_GET['hash'])
);
$db->query($sql);
}
$db->close();
function usage_error()
{
//ob_start();
header($_SERVER["SERVER_PROTOCOL"]." 404 Not Found");
header("Status: 404 Not Found");
// Matching server 404 output can be added.
exit();
}
function encode_ip($dotquad_ip)
{
$ip_sep = explode('.', $dotquad_ip);
return sprintf('%02x%02x%02x%02x', $ip_sep[0], $ip_sep[1], $ip_sep[2], $ip_sep[3]);
}
?>