133 lines
No EOL
3.4 KiB
JavaScript
133 lines
No EOL
3.4 KiB
JavaScript
/**
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* Author: Samir MEDJIAH medjiah@laas.fr
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* File : gateway.js
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* Version : 0.1.0
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*/
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var express = require('express')
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var app = express()
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app.use(express.json()) // for parsing application/json
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var request = require('request');
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const si = require('systeminformation');
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var argv = require('yargs').argv;
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// --local_ip
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// --local_port
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// --local_name
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// --remote_ip
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// --remote_port
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// --remote_name
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var LOCAL_ENDPOINT = {IP : argv.local_ip, PORT : argv.local_port, NAME : argv.local_name};
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var REMOTE_ENDPOINT = {IP : argv.remote_ip, PORT : argv.remote_port, NAME : argv.remote_name};
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const E_OK = 200;
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const E_CREATED = 201;
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const E_FORBIDDEN = 403;
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const E_NOT_FOUND = 404;
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const E_ALREADY_EXIST = 500;
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var db = {
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gateways : new Map()
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};
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function addNewGateway(gw) {
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var res = -1;
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if (!db.gateways.get(gw.Name)) {
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db.gateways.set(gw.Name, gw);
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res = 0;
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}
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return res;
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}
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function removeGateway(gw) {
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if (db.gateways.get(gw.Name))
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db.gateways.delete(gw.Name);
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}
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function doPOST(uri, body, onResponse) {
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request({method: 'POST', uri: uri, json : body}, onResponse);
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}
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function register() {
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doPOST(
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'http://' + REMOTE_ENDPOINT.IP + ':' + REMOTE_ENDPOINT.PORT + '/gateways/register',
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{
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Name : LOCAL_ENDPOINT.NAME,
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PoC : 'http://' + LOCAL_ENDPOINT.IP + ':' + LOCAL_ENDPOINT.PORT,
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},
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function(error, response, respBody) {
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console.log(respBody);
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}
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);
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}
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app.post('/gateways/register', function(req, res) {
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console.log(req.body);
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var result = addNewGateway(req.body);
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if (result === 0)
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res.sendStatus(E_CREATED);
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else
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res.sendStatus(E_ALREADY_EXIST);
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});
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app.post('/devices/register', function(req, res) {
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console.log(req.body);
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doPOST(
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'http://' + REMOTE_ENDPOINT.IP + ':' +REMOTE_ENDPOINT.PORT + '/devices/register',
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req.body,
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function(error, response, respBody) {
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console.log(respBody);
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res.sendStatus(E_OK);
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}
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)
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});
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app.post('/device/:dev/data', function(req, res) {
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console.log(req.body);
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var dev = req.params.dev;
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doPOST(
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'http://' + REMOTE_ENDPOINT.IP + ':' +REMOTE_ENDPOINT.PORT + '/device/' + dev + '/data',
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req.body,
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function(error, response, respBody) {
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console.log(respBody);
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res.sendStatus(E_OK);
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}
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)
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});
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app.get('/gateways', function(req, res) {
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console.log(req.body);
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let resObj = [];
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db.gateways.forEach((v,k) => {
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resObj.push(v);
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});
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res.send(resObj);
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});
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app.get('/gateway/:gw', function(req, res) {
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console.log(req.body);
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var gw = req.params.gw;
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var gateway = db.gateways.get(gw);
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if (gateway)
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res.status(E_OK).send(JSON.stringify(gateway));
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else
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res.sendStatus(E_NOT_FOUND);
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});
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app.get('/ping', function(req, res) {
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console.log(req.body);
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res.status(E_OK).send({pong: Date.now()});
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});
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app.get('/health', function(req, res) {
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console.log(req.body);
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si.currentLoad((d) => {
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console.log(d);
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res.status(E_OK).send(JSON.stringify(d));
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})
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});
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register();
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app.listen(LOCAL_ENDPOINT.PORT , function () {
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console.log(LOCAL_ENDPOINT.NAME + ' listening on : ' + LOCAL_ENDPOINT.PORT );
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}); |