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eve-connector-server.js
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eve-connector-server.js
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var exports = module.exports = {};
process.on('uncaughtException', function(err) {
debug('uncaughtException', err);
});
var debug = require('debug')('eve-connector:server');
debug('Debug enabled');
var fs = require('fs');
var https_options = {
key: fs.readFileSync(__dirname + '/server.key'),
cert: fs.readFileSync(__dirname + '/server.crt')
};
var usbDevices = require('./usbDevices.js');
var serialDevices = require('./serialDevices.js');
var websocketDevices = require('./websocketDevices.js');
var getDeviceModule = function(device) {
try {
var type = typeof(device) == 'string' ? device : device.type;
switch(type) {
case 'usb':
return usbDevices;
case 'serial':
return serialDevices;
case 'websocket':
return websocketDevices;
default:
return false;
}
}
catch(e) {
return false;
}
}
var Server = function(port, https_options) {
// Start server
//
var https = require('https');
var express = require('express');
this.express = express();
var httpsServer = https.createServer(https_options, this.express);
httpsServer.listen(port);
var io = require('socket.io')(httpsServer);
console.info('Eve-Connector up and running. Listening on port ' + port);
// Static web pages
//
this.express.get('/', function (req, res) {
res.sendFile(__dirname + '/web/index.html');
});
this.express.get('/dev', function (req, res) {
res.sendFile(__dirname + '/web/dev.html');
});
this.express.get('/test', function (req, res) {
res.sendFile(__dirname + '/web/test.html');
});
this.express.use('/js', express.static(__dirname + '/web/js'));
this.express.use('/test_data', express.static(__dirname + '/web/test_data'));
// WebSockets
//
io.on('connection', function(socket) {
debug('a user connected', socket.id);
socket.emitError = function(channel, error) {
var err = error.message ? error.message : error;
socket.emit(channel, {err: err});
}
socket.on('error', function(err){
debug('socket.on(error)', err);
});
socket.on('disconnect', function() {
debug('user disconnected', socket.id);
});
socket.on('isDeviceAvailable', function(device) {
debug('received isDeviceAvailable: ', device);
var devmod = getDeviceModule(device);
if (!devmod) {
socket.emitError('isDeviceAvailable', ['Device type not supported', device]);
return;
}
devmod.isDeviceAvailable(device).then(
function(res){
socket.emit('isDeviceAvailable', {res: res});
debug('isDeviceAvailable answered');
},
function(err){
socket.emitError('isDeviceAvailable', err);
debug('isDeviceAvailable answered with error: ', err.message);
}
);
});
socket.on('areDevicesAvailable', function(query) {
debug('received areDevicesAvailable: ', query);
var type = query.type;
var list = query.params;
var devmod = getDeviceModule(type);
if (!devmod) {
socket.emitError('areDevicesAvailable', ['Device type not supported', type]);
return;
}
devmod.areDevicesAvailable(type, list).then(
function(res){
if ( Array.isArray(res) ) {
res = res.length ? res[0] : { type: type, params: []};
}
socket.emit('areDevicesAvailable', {res: res});
debug('areDevicesAvailable answered');
},
function(err){
socket.emitError('areDevicesAvailable', err);
debug('areDevicesAvailable answered with error: ', err.message);
}
);
});
socket.on('sendData', function(device, data) {
debug('received sendData: ', device, 'data...');
var devmod = getDeviceModule(device);
if (!devmod) {
socket.emitError('sendData', ['Device type not supported', device]);
return;
}
devmod.sendData(device, data, socket).then(
function(res){
socket.emit('sendData', {res: res});
debug('sendData answered');
},
function(err){
socket.emitError('sendData', err);
debug('sendData answered with error: ', err.message);
}
);
});
socket.on('readData', function(device, length) {
debug('received readData: ', device, length);
var devmod = getDeviceModule(device);
if (!devmod) {
socket.emitError('sendData', ['Device type not supported', device]);
return;
}
devmod.readData(device, length).then(
function(res){
socket.emit('readData', {res: res});
debug('readData answered');
},
function(err){
socket.emitError('readData', err);
debug('readData answered with error: ', err.message);
}
);
});
socket.on('startPoll', function(device) {
debug('received startPoll: ', device);
var devmod = getDeviceModule(device);
if (!devmod) {
socket.emitError('startPoll', ['Device type not supported', device]);
return;
}
devmod.startPoll(device, socket).then(
function(res){
socket.emit('startPoll', {res: res});
debug('startPoll answered');
},
function(err){
socket.emitError('startPoll', err);
debug('startPoll answered with error: ', err.message);
}
);
});
socket.on('stopPoll', function(device) {
debug('received stopPoll: ', device);
try {
var devmod = getDeviceModule(device);
devmod.stopPoll(device);
}
catch(error) {
socket.emitError('stopPoll', error);
debug('stopPoll answered with error:', error);
}
});
socket.on('resetData', function(device) {
debug('received resetData: ', device);
var devmod = getDeviceModule(device);
if(!(device.type == 'usb' || devmod)) {
socket.emitError('resetData', ['reset not supported for device type', device]);
return;
}
devmod.resetData(device);
});
});
} // end createServer()
// Display some information about this module (based on package.jon)
require('appinspect').print(module);
exports.createServer = function(port, https_options){
return new Server(port, https_options);
}