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webserver.js
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417 lines (372 loc) · 11.9 KB
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var http = require('http').createServer(handler); //require http server, and create server with function handle$
var fs = require('fs'); //require filesystem module
var path = require('path');
var io = require('socket.io')(http) //require socket.io module and pass the http object (server)
//io.set('transports',['websocket']);
io.set('heartbeat timeout', 4000);
io.set('heartbeat interval', 2000);
const sqlite3 = require('sqlite3').verbose();
// Global vars
//var QNH = 1013;
let db = new sqlite3.Database('/memdb/memdb.db', sqlite3.OPEN_READONLY, (err) => {
if (err) {
console.error(err.message);
}
console.log('Connected to the database.');
});
db.run("PRAGMA busy_timeout = 1000");
db.run("PRAGMA journal_mode = WAL");
http.listen(8088); //listen to port 80
function handler (request, response) { //create server
console.log('Server starting...');
// console.log('Session' + request.sessionID);
var filePath = '.' + request.url;
if (filePath == './')
filePath = './EFIS.html';
var extname = path.extname(filePath);
var contentType = 'text/html';
switch (extname) {
case '.js':
contentType = 'text/javascript';
break;
case '.css':
contentType = 'text/css';
break;
case '.json':
contentType = 'application/json';
break;
case '.png':
contentType = 'image/png';
break;
case '.jpg':
contentType = 'image/jpg';
break;
case '.wav':
contentType = 'audio/wav';
break;
case '.svg':
contentType = 'image/svg+xml';
break;
}
fs.readFile(filePath, function(error, content) {
if (error) {
if(error.code == 'ENOENT'){
fs.readFile('./404.html', function(error, content) {
response.writeHead(200, { 'Content-Type': contentType });
response.end(content, 'utf-8');
});
}
else {
response.writeHead(500);
response.end('Sorry, check with the site admin for error: '+error.code+' ..\n');
response.end();
}
}
else {
response.writeHead(200, { 'Content-Type': contentType });
response.end(content, 'utf-8');
}
});
}
io.sockets.on('connection', function (socket) {// WebSocket Connection
// var lightvalue = 0; //static variable for current status
var QNH = 1013;
var Airspeed = 0;
var Altitude = 0;
var VerticalSpeed = 0;
var Heading = 0;
var Roll = 0;
var Pitch = 0;
var TurnRate = 0;
var TachoRPM = 0;
var FuelPressure = 0;
var FuelFlow = 0;
var FuelTank1 = 0;
var OilTemperature = 0;
var OilPressure = 0;
var EGT1 = 0;
var EGT2 = 0;
var EGT3 = 0;
var EGT4 = 0;
var CHT1 = 0;
var CHT2 = 0;
var CHT3 = 0;
var CHT4 = 0;
var Volts = 0;
var AmpsAlternator = 0;
var AmpsBattery = 0;
var GPS_GS = 0;
var GPS_Alt = 0;
var GPS_TRK_T = 0;
var TimeUTC = '00:00:00';
var TempSeconds = 0;
var TS_TachoRPM = 0;
var TS_FuelPressure = 0;
var TS_FuelFlow = 0;
var TS_FuelTank1 = 0;
var TS_OilTemperature = 0;
var TS_OilPressure = 0;
var TS_EGT1 = 0;
var TS_EGT2 = 0;
var TS_EGT3 = 0;
var TS_EGT4 = 0;
var TS_CHT1 = 0;
var TS_CHT2 = 0;
var TS_CHT3 = 0;
var TS_CHT4 = 0;
var TS_Volts = 0;
var TS_AmpsAlternator = 0;
var TS_AmpsBattery = 0;
var TS_GPS_GS = 0;
var TS_GPS_Alt = 0;
var TS_GPS_TRK_T = 0;
// socket.on('light', function(data) { //get light switch status from client
// lightvalue = data;
// if (lightvalue) {
// console.log(lightvalue); //turn LED on or off, for now we will just show it in console.log
// }
// });
// Update at 20Hz
var increment = 0;
var myInterval = setInterval(function() {
var d = new Date();
// get the data from the database
db.serialize(() => {
db.each('SELECT * FROM messages', (err, row) => {
if (err) {
console.error(err.message);
}
// console.log(row.Param_Text + "\t" + row.Param_Value);
switch (row.Param_Text) {
case 'Airspeed':
if (Airspeed != row.Param_Value) {
Airspeed = row.Param_Value;
socket.emit('Airspeed', Airspeed );
}
break;
case 'Altitude':
if (Math.abs(row.Param_Value - Altitude)>20) {
Altitude = row.Param_Value;
socket.emit('Altitude', Altitude );
// console.log(Static_Pressure + "\t" + Altitude);
}
break;
case 'VerticalSpeed':
if (Math.abs(VerticalSpeed - row.Param_Value) > 50) {
VerticalSpeed = row.Param_Value;
if (Math.abs(VerticalSpeed)<90) {
VerticalSpeed = 0;
}
socket.emit('Vario', VerticalSpeed);
// console.log(row.Param_Text + "\t" + row.Param_Value);
}
break;
case 'QNH':
if (QNH != row.Param_Value) {
QNH = row.Param_Value;
if (QNH == 0) {
QNH = 1013;
}
socket.emit('QNH', QNH);
}
break;
case 'Heading':
if (Heading != row.Param_Value) {
Heading = row.Param_Value;
socket.emit('Heading', Heading );
}
break;
case 'Roll':
if (Roll != row.Param_Value) {
Roll = -row.Param_Value;
socket.emit('AH_Roll', Roll );
}
break;
case 'Pitch':
if (Pitch != -row.Param_Value) {
Pitch = row.Param_Value;
socket.emit('AH_Pitch', Pitch );
}
break;
case 'TurnRate':
if (TurnRate != row.Param_Value) {
TurnRate = row.Param_Value;
socket.emit('Turn', TurnRate );
}
break;
case 'RPM':
if (TachoRPM != row.Param_Value || d.getTime() - TS_TachoRPM > 12000) {
TS_TachoRPM = d.getTime() - Math.floor(Math.random() * 5000);
TachoRPM = row.Param_Value;
// TachoRPM = FuelFlow*2; //******************************************************
socket.emit('TachoRPM', TachoRPM );
// console.log("RPM = " + row.Param_Value);
}
break;
case 'FuelPressure':
if (FuelPressure != row.Param_Value || d.getTime() - TS_FuelPressure > 12000) {
TS_FuelPressure = d.getTime() - Math.floor(Math.random() * 5000);
FuelPressure = row.Param_Value;
// FuelPressure = FuelFlow/10000;
socket.emit('FuelPressure', FuelPressure/1000 );
}
break;
case 'FuelFlow':
if (FuelFlow != row.Param_Value || d.getTime() - TS_FuelFlow > 12000) {
TS_FuelFlow = d.getTime() - Math.floor(Math.random() * 5000);
FuelFlow = row.Param_Value;
socket.emit('FuelFlow', FuelFlow/100 );
}
break;
case 'FuelTank1':
if (FuelTank1 != row.Param_Value) {
FuelTank1 = row.Param_Value;
socket.emit('FuelTank1', FuelTank1 );
}
break;
case 'OilTemperature':
if (OilTemperature != row.Param_Value || d.getTime() - TS_OilTemperature > 12000) {
TS_OilTemperature = d.getTime() - Math.floor(Math.random() * 5000);
OilTemperature = row.Param_Value;
socket.emit('OilTemperature', OilTemperature/10 );
}
break;
case 'OilPressure':
if (OilPressure != row.Param_Value || d.getTime() - TS_OilPressure > 12000) {
TS_OilPressure = d.getTime() - Math.floor(Math.random() * 5000);
OilPressure = row.Param_Value;
socket.emit('OilPressure', OilPressure/1000 );
}
break;
case 'EGT1':
if (EGT1 != row.Param_Value || d.getTime() - TS_EGT1 > 12000) {
TS_EGT1 = d.getTime() - Math.floor(Math.random() * 5000);
EGT1 = row.Param_Value;
// EGT1 = FuelFlow*2/10; //******************************************************
socket.emit('EGT1', EGT1 );
}
break;
case 'EGT2':
if (EGT2 != row.Param_Value || d.getTime() - TS_EGT2 > 12000) {
TS_EGT2 = d.getTime() - Math.floor(Math.random() * 5000);
EGT2 = row.Param_Value;
// EGT2 = FuelFlow*2/10; //******************************************************
socket.emit('EGT2', EGT2 );
}
break;
case 'EGT3':
if (EGT3 != row.Param_Value || d.getTime() - TS_EGT3 > 12000) {
TS_EGT3 = d.getTime() - Math.floor(Math.random() * 5000);
EGT3 = row.Param_Value;
// EGT3 = FuelFlow*2/10; //******************************************************
socket.emit('EGT3', EGT3 );
}
break;
case 'EGT4':
if (EGT4 != row.Param_Value || d.getTime() - TS_EGT4 > 12000) {
TS_EGT4 = d.getTime() - Math.floor(Math.random() * 5000);
EGT4 = row.Param_Value;
// EGT4 = FuelFlow*2/10; //******************************************************
socket.emit('EGT4', EGT4 );
}
break;
case 'CHT1':
if (CHT1 != row.Param_Value || d.getTime() - TS_CHT1 > 12000) {
TS_CHT1 = d.getTime() - Math.floor(Math.random() * 5000);
CHT1 = row.Param_Value;
socket.emit('CHT1', CHT1 );
}
break;
// Standard Rotax 912 has only two CHT sensors so the CHT2 and CHT3 are temporary disabled to save space on the display
/*
case 'CHT2':
if (CHT2 != row.Param_Value) {
CHT2 = row.Param_Value;
socket.emit('CHT2', CHT2 );
}
break;
case 'CHT3':
if (CHT3 != row.Param_Value) {
CHT3 = row.Param_Value;
socket.emit('CHT3', CHT3 );
}
break;
*/
case 'CHT4':
if (CHT4 != row.Param_Value || d.getTime() - TS_CHT4 > 12000) {
TS_CHT4 = d.getTime() - Math.floor(Math.random() * 5000);
CHT4 = row.Param_Value;
socket.emit('CHT4', CHT4 );
}
break;
case 'Volts':
if (Volts != row.Param_Value) {
Volts = row.Param_Value;
socket.emit('Volts', Volts/1000 );
}
break;
case 'AmpsAlternator':
if (AmpsAlternator != row.Param_Value) {
AmpsAlternator = row.Param_Value;
socket.emit('AmpsAlternator', AmpsAlternator/1000 );
}
break;
case 'AmpsBattery':
if (AmpsBattery != row.Param_Value) {
AmpsBattery = row.Param_Value;
socket.emit('AmpsBattery', AmpsBattery/1000 );
}
break;
case 'GPS_GS':
if (GPS_GS != row.Param_Value) {
GPS_GS = row.Param_Value;
socket.emit('GPS_GS', GPS_GS );
}
break;
case 'GPS_Alt':
if (GPS_Alt != row.Param_Value) {
GPS_Alt = row.Param_Value;
socket.emit('GPS_Alt', GPS_Alt );
}
break;
case 'GPS_TRK_T':
if (GPS_TRK_T != row.Param_Value) {
GPS_TRK_T = row.Param_Value;
socket.emit('GPS_TRK_T', GPS_TRK_T );
}
break;
}
});
});
if (TempSeconds != d.getSeconds()) {
if (d.getHours() < 10) {
TimeUTC = '0' + d.getHours() + ':';
} else {
TimeUTC = d.getHours() + ':';
}
if (d.getMinutes() < 10) {
TimeUTC = TimeUTC + '0' + d.getMinutes() + ':';
} else {
TimeUTC = TimeUTC + d.getMinutes() + ':';
}
if (d.getSeconds() < 10) {
TimeUTC = TimeUTC + '0' + d.getSeconds();
} else {
TimeUTC = TimeUTC + d.getSeconds();
}
socket.emit('TimeUTC', TimeUTC);
}
increment++;
//console.log('increment='+increment);
//console.log('Session = ' + request.session);
if (increment>1000000) {
increment = 0;
}
}, 50);
// if user is disconnected or went to another page break the loop (Interval) above
socket.on('disconnect',function(){
console.log('User disconnected. Msg count: '+increment);
clearInterval(myInterval); });
});
//io.sockets.on('disconnect',function(){
// console.log('user disconnected'); });