/
index.js
98 lines (84 loc) · 2.35 KB
/
index.js
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var app = require('express')();
var http = require('http').Server(app);
var io = require('socket.io')(http);
var json2csv = require('json2csv');
var fs = require('fs');
var dataStores = {
"accel": [],
"gyro": [],
"magnet": []
};
var fields = ['x', 'y', 'z'];
app.get('/accel', function (req, res) {
console.log(req.headers.accel.toString());
logData('accel', JSON.parse(req.headers.accel));
res.send('Received accel data.');
});
app.get('/gyro', function (req, res) {
console.log(req.headers.gyro.toString());
logData('gyro', JSON.parse(req.headers.gyro));
res.send('Received gyro data.');
});
app.get('/magnet', function (req, res) {
console.log(req.headers.magnet.toString());
logData('magnet', JSON.parse(req.headers.magnet));
res.send('Received magnet data.');
});
/*
Sends a JSON object of the logged data for the requested sensor
(accel, gyro, magnet)
*/
app.get('/*json', function (req, res) {
var type = req.url.slice(1, -4);
if (type in dataStores) {
console.log(dataStores);
res.send(dataStores[type]);
} else {
res.send("No logged data for " + type);
}
});
app.get('/*csv', function (req, res) {
console.log(req.url);
var type = req.url.slice(1, -3);
var csv = json2csv({
data: dataStores[type],
fields: fields
});
fs.writeFile('./' + type + Date.now() + '.csv', csv, function (err) {
if (err) {
console.log(err);
res.send("Error saving CSV file");
} else {
res.send("Saved CSV file for " + type);
}
});
});
io.on('connection', function (socket) {
console.log('a user connected');
socket.broadcast.emit('connection');
socket.on('disconnect', function () {
console.log('user disconnected');
});
socket.on('accel', function (data) {
console.log(data.toString());
logData('accel', data);
});
socket.on('gyro', function (data) {
console.log(data.toString());
logData('gyro', data);
});
socket.on('magnet', function (data) {
console.log(data.toString());
logData('magnet', data);
});
});
http.listen(3000, function () {
console.log('listening on *:3000');
});
function logData(dataType, data) {
dataStores[dataType].push({
"x": data[0],
"y": data[1],
"z": data[2]
});
}