domotz-remote-pawn/src/http/socketHandler.js

Domotz Agent

/** This file is part of Domotz Agent.
 * Copyright (C) 2016  Domotz Ltd
 *
 * Domotz Agent is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Domotz Agent is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Domotz Agent.  If not, see <http://www.gnu.org/licenses/>.
 **/
/**
 * Created by Massimiliano Cuzzoli <mcuzzoli@domotz.com> on 27/08/15.
 *
 */
const MODULE_NAME = 'SOCKET_HANDLER';

function handleAction(action) {
    console.debug('%s - Received action: %s', MODULE_NAME, action);
    switch (action) {
        case 'listener_status_check':
            console.info('%s - Check Listener Status. TODO: Diagnostic Module', MODULE_NAME);
            break;
        default:
            throw new Error('Unsupported action ' + action + ' requested on socket');
    }
}

function parseBody(body) {
    var command = JSON.parse(body);
    if (!command.action) {
        throw new Error('Invalid request body = ' + body);
    }
    return command;
}

module.exports.handleRequest = function (request, response) {
    var body = '';

    if (request.method !== 'POST') {
        console.warn('%s - Received unknown method: %s', MODULE_NAME, request.method);
        response.writeHead(400);
        response.end();
    } else {
        request.on('data', function (data) {
            body += data;
        });
        request.on('end', function () {
            try {
                var command = parseBody(body);
                handleAction(command.action);
                console.info('%s - External request handled properly. Action: %s', MODULE_NAME, command.action);
                response.writeHead(200);
                response.end();
            } catch (err) {
                console.warn('%s - Bad request: %s', MODULE_NAME, err.message);
                response.writeHead(400);
                response.end();
            }
        });
    }
};