node-red-contrib-snap4city-user/event-log.js

Nodes for Snap4city project, targeted to standard user (no developer)

/* NODE-RED-CONTRIB-SNAP4CITY-USER
   Copyright (C) 2018 DISIT Lab http://www.disit.org - University of Florence

   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU Affero General Public License as
   published by the Free Software Foundation, either version 3 of the
   License, or (at your option) any later version.

   This program 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 Affero General Public License for more details.

   You should have received a copy of the GNU Affero General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>. */
module.exports = function (RED) {
	var os = require('os');
	var ifaces = os.networkInterfaces();
	var msgs = [{}, {}];

	function EventLog(config) {
		RED.nodes.createNode(this, config);
		var node = this;
		var s4cUtility = require("./snap4city-utility.js");
        const logger = s4cUtility.getLogger(RED, node);
		node.on('input', function (msg) {
			var uri = RED.settings.eventLogUri;
			if (uri != null) {
				var pidlocal = RED.settings.APPID;
				var iplocal = null;
				Object.keys(ifaces).forEach(function (ifname) {
					ifaces[ifname].forEach(function (iface) {
						if ('IPv4' !== iface.family || iface.internal !== false) {
							// skip over internal (i.e. 127.0.0.1) and non-ipv4 addresses
							return;
						}
						iplocal = iface.address;
					});
				});
				iplocal = iplocal + ":" + RED.settings.uiPort;
				var timestamp = new Date().getTime();
				var modcom = config.modcom;

				var ipext = (msg.payload.ipext ? msg.payload.ipext : config.ipext);
				var payloadsize = JSON.stringify(msg.payload).length / 1000;
				var agent = "Node-Red";
				var motivation = config.motivation;
				var lang = (msg.payload.lang ? msg.payload.lang : config.lang);
				var lat = (msg.payload.lat ? msg.payload.lat : config.lat);
				var lon = (msg.payload.lon ? msg.payload.lon : config.lon);
				var serviceuri = (msg.payload.serviceuri ? msg.payload.serviceuri : config.serviceuri);
				var message = (msg.payload.message ? msg.payload.message : config.message);
				var XMLHttpRequest = require("xmlhttprequest").XMLHttpRequest;
				var xmlHttp = new XMLHttpRequest();
				xmlHttp.open("GET", encodeURI(uri + "/?p=log" + "&pid=" + pidlocal + "&tmstmp=" + timestamp + "&modCom=" + modcom + "&IP_local=" + iplocal + "&IP_ext=" + ipext +
					"&payloadSize=" + payloadsize + "&agent=" + agent + "&motivation=" + motivation + "&lang=" + lang + "&lat=" + (typeof lat != "undefined" ? lat : 0.0) + "&lon=" + (typeof lon != "undefined" ? lon : 0.0) + "&serviceUri=" + serviceuri + "&message=" + message), true); // false for synchronous request
				xmlHttp.onload = function (e) {
					if (xmlHttp.readyState === 4) {
						if (xmlHttp.status === 200) {
							msgs[1].payload = xmlHttp.responseText;
						} else {
							logger.error(xmlHttp.statusText);
							node.error(xmlHttp.responseText);
						}
					}
					msgs[0].payload = msg.payload;
					node.send(msgs);
				};
				xmlHttp.onerror = function (e) {
					logger.error(xmlHttp.statusText);
					node.error(xmlHttp.responseText);

				};
				xmlHttp.send(null);
			} else {
				msgs[0].payload = msg.payload;
				node.send(msgs);
			}
		});
	}
	RED.nodes.registerType("event-log", EventLog);
}