Initial commit - express server, where citysys-terminal app is uploaded
This commit is contained in:
rasta5man
commit
c4065c3f9c
9 changed files with 1623 additions and 0 deletions
647
index.js
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647
index.js
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//https://www.dontpanicblog.co.uk/2016/04/17/websocket-push-notifications-with-node-js/
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//!!!!!!!!!!!!!!!!
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//!!! if express server is running, but it's not servig pages - try to unblock PORT
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//!!!!!!!!!!!!!!!!
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let wss = undefined;
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let startWebSocketServer = false;
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//startWebSocketServer = false;//KONSBERG
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if(startWebSocketServer)
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{
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var WebSocketServer = require('ws').Server;
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wss = new WebSocketServer({ port: 9090 });
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}
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const express = require("express");
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const bodyParser = require('body-parser');
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const app = express(); // create express app
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//const SerialPort = require('serialport');
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const { exec } = require('child_process');
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const { crc8, crc16, crc32 } = require('easy-crc');
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const http = require('http');
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const status = require('http-status');
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const username = "admin";
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const password = "admin";
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const decodeValue = require('./decodeValue.js');
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const { openPort, runSyncExec, writeData } = require('./serialport_helper.js');
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//const hostname = "10.0.0.5";
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const hostname = "localhost";
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process.on('uncaughtException', function(error) {
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// do something clever here
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//TODO send message to services!!!
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console.log("errors", error); // do NOT do this for real!
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});
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function httpRequest(params, postData) {
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return new Promise(function(resolve, reject) {
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console.log(params);
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var req = http.request(params, function(res) {
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// reject on bad status
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if (res.statusCode < 200 || res.statusCode >= 300) {
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return reject(new Error(res.statusCode + " " + status[res.statusCode]));
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}
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// cumulate data
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var body = [];
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res.on('data', function(chunk) {
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body.push(chunk);
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});
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// resolve on end
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res.on('end', function() {
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try {
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console.log("body", body);
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body = JSON.parse(Buffer.concat(body).toString());
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} catch(e) {
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reject(e);
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}
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resolve(body);
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});
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});
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// reject on request error
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req.on('error', function(err) {
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// This is not a "Second reject", just a different sort of failure
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reject(err);
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});
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if (postData) {
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req.write(postData);
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}
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// IMPORTANT
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req.end();
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});
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}
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//terminal----------------------------------
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function detectIfResponseIsValid(bytes)
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{
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let type = "RESPONSE";
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if(bytes[4] == 0) type = "RESPONSE";
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else if(bytes[4] == 1) type = "ERROR";
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else if(bytes[4] == 2) type = "EVENT";
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else type = "UNKNOWN";
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let crc = crc16('ARC', bytes.slice(0, 9));
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let c1 = (crc >> 8) & 0xFF;
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let c2 = crc & 0xFF;
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let message = "OK";
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let error = "";
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if(c1 != bytes[9])
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{
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//CRC_ERROR
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message = "NOK";
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error = "CRC_ERROR c1";
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}
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if(c2 != bytes[10])
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{
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//CRC_ERROR
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message = "NOK";
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error = "CRC_ERROR c2";
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}
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//crc error
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if(type != "RESPONSE")
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{
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message = "NOK";
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}
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return {message: message, type: type, error: error};
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}
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handleResponse = (bytes, cmd) =>
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{
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console.log("handleResponse");
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let result = detectIfResponseIsValid(bytes);
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let message = result.message;
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let type = result.type;
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let error = result.error;
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if(message != "OK")
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{
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return {type: type, message: message + " " + error + " " + bytes.join(", "), 'date': (new Date()).getTime()};
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}
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let add = (bytes[0] >> 24) | (bytes[1] >> 16) | (bytes[2] >> 8) | bytes[3];
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let decodedValue = "cmd: " + cmd;
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if(cmd >= 0x8000)
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{
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return decodeValue(add, cmd, bytes[5],bytes[6],bytes[7],bytes[8]);
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}
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return {type: type, message: message + " " + bytes.join(", "), 'date': (new Date()).getTime()};
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}
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com_generic = (adresa, rec, rw, register, name, byte1, byte2, byte3, byte4) =>{
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let resp = [];
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let cmd = register;
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if (rw === 0)
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{
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cmd = cmd + 0x8000;
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}
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if (rec === 3)
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{
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resp.push(0xFF);
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resp.push(0xFF);
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resp.push(0xFF);
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resp.push(0xFF);
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resp.push( adresa & 0xFF );//band
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}
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else
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{
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resp.push( (adresa >> 24) & 0xFF);//rshift
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resp.push( (adresa >> 16) & 0xFF);
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resp.push( (adresa >> 8) & 0xFF);
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resp.push( adresa & 0xFF );
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if (rec === 2)
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{
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resp.push(0xFF);
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}
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else resp.push(0);
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}
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resp.push( (cmd >> 8) & 0xFF);//rshift
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resp.push( cmd & 0xFF );//band
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resp.push( byte1 & 0xFF );//band
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resp.push( byte2 & 0xFF );//band
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resp.push( byte3 & 0xFF );//band
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resp.push( byte4 & 0xFF );//band
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//let data = '12345';
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let crc = crc16('ARC', resp);
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let c1 = (crc >> 8) & 0xFF;
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let c2 = crc & 0xFF;
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resp.push(c1);
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resp.push(c2);
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console.log("checksum", crc);
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console.log("resp", resp);
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return resp;
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}
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//-------------
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//https://expressjs.com/en/resources/middleware/cors.html
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var cors = require('cors');
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const { report } = require("process");
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app.use(cors());
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app.use(bodyParser.urlencoded({ extended: true }));
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app.use(bodyParser.json());
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// add middleware
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//app.use(express.static("public"));
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app.use(express.static(__dirname + "/public"));
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app.get('/restart', function (req, res) {
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console.log('restart');
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exec(`service nodejs restart`, (err, stdout, stderr) => {
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if (err || stderr) {
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console.log("failed to restart nodejs");
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console.error(err);
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console.log(stderr);
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let response = {"message": "failed to restart nodejs " + err};
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res.json(response);
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} else {
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console.log(stdout);
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console.log(`Successfully restarted service nodejs ${stdout}`);
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let response = {"message": "restarted"};
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res.json(response);
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}
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});
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//res.sendStatus(200);
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});
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//KONBERG
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// Broadcast updates to all WebSocketServer clients
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//app.post('/notify', function (req, res) {
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app.get('/notify', function (req, res) {
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if(wss == undefined)
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{
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res.sendStatus(200);
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return;
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}
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console.log('Event: notify');
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wss.clients.forEach(function each(client) {
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client.send("broadcast: updated");
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//console.log('broadcast', client);
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});
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res.sendStatus(200);
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});
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//---general
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app.get('/db', function(req, res) {
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//res.sendStatus(404);
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let params = {table: "settings", action: "read"};
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const data = JSON.stringify(params);
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let h = hostname;
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const httpRequestParams = {
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hostname: h,
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port: 12345,
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path: '/db_connector',
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method: 'POST',
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headers: {
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'Content-Type': 'application/json',
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'Content-Length': data.length
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}
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}
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httpRequest(httpRequestParams, data).then(function(body) {
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console.log("response", body);
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let response = {"data": body.data};
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res.json(response);
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}).catch(function (e) {
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//console.log(e);
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//messages.push({type: "ERROR", message: e.message});
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let response = {"message": e.message, "type": "ERROR"};
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res.json(response);
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// and so on
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});
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});
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app.post('/db', function(req, res) {
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//res.sendStatus(404);
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console.log("request", req.body);
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//let params = {table: req.body.table, action: req.body.action};
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let params = req.body;
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const data = JSON.stringify(params);
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let h = hostname;
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if(req.body.hostname !== undefined) h = req.body.hostname;
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const httpRequestParams = {
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hostname: h,
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port: 12345,
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path: '/db_connector',
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method: 'POST',
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headers: {
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'Content-Type': 'application/json',
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'Content-Length': data.length
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}
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}
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httpRequest(httpRequestParams, data).then(function(body) {
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console.log("response", body.data);
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//let response = {"data": body.data};
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let response = body.data;
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//res.sendStatus(200);
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res.json(response);
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return;
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}).catch(function (e) {
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//console.log(e);
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let response = {"message": e.message, "type": "ERROR"};
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res.json(response);
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// and so on
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});
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});
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app.post('/validate', function(req, res) {
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let response = {"valid": false};
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if(username === req.body.username && password === req.body.password)
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{
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response.valid = true;
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}
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res.json(response);
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});
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//--terminal
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app.get('/cmd', function(req, res) {
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//console.log('GET: Got body:', req.body);
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//res.send("error: use POST request instead");
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res.sendStatus(501);
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});
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//https://zellwk.com/blog/async-await-express/
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app.post('/cmd', async(req, res, next) => {
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console.log('POST: Got body:', req.body);
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if(username != req.body.username && password != req.body.password)
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{
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res.sendStatus(501);
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return;
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}
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let message = "";//TODO remove
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let messages = [];
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let makeHttpRequest = true;
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//make http request
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let params = req.body.command;
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let cmd = params.register;
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//hostname: req.body.hostname,
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let h = hostname;
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if(req.body.hostname !== undefined) h = req.body.hostname;
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if(makeHttpRequest)
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{
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const data = JSON.stringify(params);
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const httpRequestParams = {
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hostname: h,
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port: 12345,
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path: '/terminal',
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method: 'POST',
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headers: {
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'Content-Type': 'application/json',
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'Content-Length': data.length
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}
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}
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await httpRequest(httpRequestParams, data).then(function(body) {
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if (params.rw === 0)
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{
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cmd = cmd + 0x8000;
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}
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let bytes = body.bytes;
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console.log("body", body, bytes, typeof body);
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let type = "RESPONSE";
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if(bytes === undefined)
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{
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if(typeof body === 'object')
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{
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type = body.type;
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messages.push({type: "ERROR", message: body.message});
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}
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}
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else
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{
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if(bytes[4] == 0) type = "RESPONSE";
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else if(bytes[4] == 1) type = "ERROR";
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else if(bytes[4] == 2) type = "EVENT";
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else type = "UNKNOWN";
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//ake data sme zapisali?
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message = bytes.join(", ");
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messages.push({type: type, message: "RESP: " + message});
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let result = handleResponse(bytes, cmd);
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if(result == undefined) messages.push({type: "ERROR", message: "ERROR: handleResponse undefined", 'date': (new Date()).getTime()});
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if(Array.isArray(result))
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{
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messages = messages.concat(result);
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}
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else
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{
|
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messages.push({type: "RESPONSE", message: result});
|
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//messages.push(result);
|
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}
|
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}
|
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|
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if(cmd >= 0x8000)
|
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{
|
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console.log("params.register", params.register);
|
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}
|
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let response = {"message": message, messages: messages, hostname: h, "type": "SUCESS"};
|
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res.json(response);
|
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|
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}).catch(function (e) {
|
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console.log(e, new Date());
|
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|
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messages.push({type: "ERROR", message: "express exception: " + e.message});
|
||||
|
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let response = {"message": message, messages: messages, hostname: h, "type": "ERROR"};
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res.json(response);
|
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// and so on
|
||||
});
|
||||
|
||||
return;
|
||||
}
|
||||
|
||||
|
||||
//if we want to use serial port directly
|
||||
|
||||
let portOpened = false;
|
||||
let error = false;
|
||||
let port = "/dev/ttymxc4";
|
||||
|
||||
try {
|
||||
|
||||
const rsPort = new SerialPort(port, { autoOpen: false });
|
||||
|
||||
/*
|
||||
await runSyncExec("ping localhost").then(function (status) {
|
||||
console.log("Promise Resolved:", status);
|
||||
message = status;
|
||||
}).catch(function (reason) {
|
||||
console.log("Promise Rejected:", reason);
|
||||
|
||||
error = true;
|
||||
message = reason;
|
||||
|
||||
});
|
||||
*/
|
||||
|
||||
messages.push({type: "INFO", message: "trying to open port directly (express.js): " + port, 'date': (new Date()).getTime()});
|
||||
|
||||
await openPort(rsPort).then(function (status) {
|
||||
console.log("Promise Resolved:", status, new Date());
|
||||
|
||||
portOpened = true;
|
||||
message = status;
|
||||
//messages.push(message);
|
||||
|
||||
|
||||
}).catch(function (reason) {
|
||||
console.log("Promise Rejected:", reason);
|
||||
|
||||
error = true;
|
||||
message = reason;
|
||||
|
||||
messages.push({type: "ERROR", message: message, 'date': (new Date()).getTime()});
|
||||
|
||||
});
|
||||
|
||||
|
||||
if(!error)
|
||||
{
|
||||
await runSyncExec("stty -F /dev/ttymxc4 115200 min 1 time 5 ignbrk -brkint -icrnl -imaxbel -opost -isig -icanon -iexten -echo -echoe -echok -echoctl -echoke").then(function (status) {
|
||||
console.log("Promise Resolved:", status, new Date());
|
||||
|
||||
//message = status;
|
||||
}).catch(function (reason) {
|
||||
console.log("Promise Rejected:", reason);
|
||||
|
||||
error = true;
|
||||
//message = escapeSpecialChars(reason);
|
||||
if(typeof reason == "object")
|
||||
{
|
||||
message = JSON.stringify(reason);
|
||||
|
||||
messages.push({type: "ERROR", message: message, 'date': (new Date()).getTime()});
|
||||
}
|
||||
});
|
||||
}
|
||||
|
||||
//WRITE DATA & READ RESPONSE
|
||||
/*
|
||||
if(error)
|
||||
{
|
||||
|
||||
//print(P.decodeValue(add, L.last_cmd, bytes[6],bytes[7],bytes[8],bytes[9]).."<br>")
|
||||
let decodedValue = decodeValue(1, 5,0, 0, 0, 0 );
|
||||
console.log(decodedValue);
|
||||
|
||||
let params = req.body.command;
|
||||
let resp = com_generic(params.address, params.recipient, params.rw, params.register, params.name, params.byte1, params.byte2, params.byte3, params.byte4);
|
||||
|
||||
//messages.push("WRITE: " + resp.join(", "));
|
||||
messages.push({type: "INFO", message: "TEST WRITE " + resp.join(", "), 'date': (new Date()).getTime()});
|
||||
}
|
||||
*/
|
||||
|
||||
if(!error)
|
||||
{
|
||||
let params = req.body.command;
|
||||
|
||||
let cmd = params.register;
|
||||
if (params.rw === 0)
|
||||
{
|
||||
//cmd = cmd + 0x8000;
|
||||
}
|
||||
|
||||
let resp = com_generic(params.address, params.recipient, params.rw, cmd, params.name, params.byte1, params.byte2, params.byte3, params.byte4);
|
||||
//messages.push({type: "WRITE", message: "WRITE " + resp.join(", "), 'date': (new Date()).getTime()});
|
||||
|
||||
await writeData(rsPort, resp, 11).then(function (data) {
|
||||
console.log("Promise Resolved:", data, new Date());
|
||||
|
||||
//process data
|
||||
/*
|
||||
RESPONSE = 0,
|
||||
ERROR = 1,
|
||||
EVENT = 2,
|
||||
TIMEOUT = 3,
|
||||
CRC_ERROR = 4
|
||||
*/
|
||||
|
||||
let bytes = data.slice(0);
|
||||
|
||||
let type = "RESPONSE";
|
||||
if(bytes[4] == 0) type = "RESPONSE";
|
||||
else if(bytes[4] == 1) type = "ERROR";
|
||||
else if(bytes[4] == 2) type = "EVENT";
|
||||
else type = "UNKNOWN";
|
||||
|
||||
//ake data sme zapisali?
|
||||
message = data.join(", ");
|
||||
messages.push({type: type, message: "RESP: " + message});
|
||||
|
||||
if(cmd >= 0x8000)
|
||||
{
|
||||
console.log("params.register", params.register);
|
||||
}
|
||||
|
||||
let result = handleResponse(bytes, cmd);
|
||||
if(result == undefined) messages.push({type: "ERROR", message: "ERROR: handleResponse undefined", 'date': (new Date()).getTime()});
|
||||
|
||||
console.log("handleResponse: ", result);
|
||||
|
||||
if(Array.isArray(result))
|
||||
{
|
||||
messages = messages.concat(result);
|
||||
}
|
||||
else
|
||||
{
|
||||
messages.push({type: "RESPONSE", message: result});
|
||||
//messages.push(result);
|
||||
}
|
||||
|
||||
}).catch(function (reason) {
|
||||
console.log("Promise Rejected:", reason, new Date());
|
||||
|
||||
error = true;
|
||||
message = reason;
|
||||
|
||||
messages.push({type: "ERROR", message: message, 'date': (new Date()).getTime()});
|
||||
|
||||
});
|
||||
}
|
||||
|
||||
if(portOpened) rsPort.close();
|
||||
|
||||
}
|
||||
catch(err) {
|
||||
console.log("Exception", err.message);
|
||||
|
||||
error = true;
|
||||
message = err.message;
|
||||
|
||||
messages.push({type: "ERROR", message: message, 'date': (new Date()).getTime()});
|
||||
}
|
||||
|
||||
console.log("END", new Date());
|
||||
|
||||
if(!error)
|
||||
{
|
||||
//let response = {"message": "OK" + JSON.stringify(req.body)};
|
||||
let response = {"message": message, messages: messages, "type": "SUCESS"};
|
||||
res.json(response);
|
||||
return;
|
||||
}
|
||||
else
|
||||
{
|
||||
let response = {"message": message, messages: messages, "type": "ERROR"};
|
||||
res.json(response);
|
||||
}
|
||||
|
||||
});
|
||||
|
||||
// start express server on port 5000
|
||||
app.listen(5000, () => {
|
||||
console.log("server started on port 5000");
|
||||
});
|
||||
Loading…
Add table
Add a link
Reference in a new issue