}
$io_stream = ssh2_exec($con, "( ./{$remote_script} ) 2>&1; echo \$?");
if ($io_stream) {
stream_set_blocking($io_stream, true);
$output = '';
while (true) {
$line = fgets($io_stream);
if ($line === false) {
break;
}
$output .= $line;
}
fclose($io_stream);
$output = rtrim($output);
$last_newline_index = strrpos($output, "\n");
$status_code = intval(substr($output, $last_newline_index + 1));
$output = substr($output, 0, $last_newline_index);
} else {
$output = false;
$status_code = false;
}
$sftp_con = ssh2_sftp($con);
if ($sftp_con) {
ssh2_sftp_unlink($sftp_con, $remote_script);
}
return array($output, $status_code);
}
$exercise = basename($_GET['exercise']);
$script = 'webserver/' . $exercise . '/check';
list($output, $status) = run_script_on_server($script, 'linuxvm196.mi.hdm-stuttgart.de', 'root', 'test.pub', 'test');
echo json_encode(array('passed' => $status == 0, 'status' => $status, 'output' => $output));
// TODO: SANITIZE input!
$exercise = $_GET['exercise'];
$script = $_CONFIG['tasks_dir'] . '/' . $exercise . '/check';
$logged_in_user = $_SERVER['PHP_AUTH_USER'];
$server_name = null;
// Lookup the server in the user to server list
$fd = fopen($_CONFIG['ssh']['user_to_server_list'], 'r');
if ($fd) {
while (($fields = fgetcsv($fd)) !== false) {
@(list($user, $server) = $fields);
if ($user === $logged_in_user) {
$server_name = $server;
break;
}
}
fclose($fd);
}
if (!$server_name) {
header('Content-Type: text/plain;charset=utf-8', true, 500);
echo "Sorry, couldn't check your exercise result. Don't know which virtual machine name belongs to your user name.";
}
list($output, $status) = run_script_on_server($script, $server_name, $_CONFIG['server_auth']['user'], $_CONFIG['server_auth']['public_key_file'], $_CONFIG['server_auth']['private_key_file']);
if ($output === false or $status === false) {
// Couldn't run check script, return 500
header('Content-Type: text/plain;charset=utf-8', true, 500);
echo "Sorry, couldn't check your exercise result. Unable to open an SSH connection to your virtual machine {$server_name}.";
} else {
$http_status = $status === 0 ? 200 : 418;
header('Content-Type: text/plain;charset=utf-8', true, $http_status);
echo $output;
}
