/
app.js
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app.js
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var twilio = null;
var http = require('http');
var fs = require('fs');
var express = require('express');
var twilio = require('twilio');
var bodyParser = require('body-parser');
var Promise = require('promise');
var mongoose = require('mongoose');
var StatefulProcessCommandProxy = require('stateful-process-command-proxy');
var Request = require('./request');
var User = require('./user');
var app = express();
app.set('views', __dirname + '/layouts');
app.set('view engine', 'ejs');
app.use(bodyParser.urlencoded({extended: true}));
var keysText = fs.readFileSync('./keys.json');
var keys = JSON.parse(keysText);
var client = twilio(keys.accountSid, keys.authToken);
var mongoURI = keys.databaseUri;
var MongoDB = mongoose.connect(mongoURI).connection;
var ok = '👌';
MongoDB.on('error', function(err) {
console.log(err.message);
});
MongoDB.once('open', function() {
console.log('Connected to MongoDB');
});
mongoose.connect(mongoURI);
var currentEpochTime = function() {
return Math.round(new Date().getTime() / 1000);
};
var disableAllUsers = function(number) {
User.find({}, function(err, users) {
if (!err && users) {
users.forEach(function(user) {
if (user.hasAccess) {
user.hasAccess = false;
user.updatedAt = currentEpochTime();
user.save();
if (number) {
sendMessage(number, user.phoneNumber, 'You\'ve been removed from this session');
}
}
});
}
});
};
var resetDatabase = function() {
Request.find({}, function(err, requests) {
if (!err && requests) {
requests.forEach(function(request) {
if (request.running) {
request.running = false;
request.updatedAt = currentEpochTime();
request.save();
}
});
}
});
disableAllUsers();
};
resetDatabase();
var statefulProcessCommandProxy = new StatefulProcessCommandProxy({
name: 'twilioInstance',
max: 5,
min: 1,
idleTimeoutMS: 90000,
logFunction: function(severity, origin, msg) {},
processCommand: '/bin/bash',
processArgs: ['-s'],
processRetainMaxCmdHistory: 10,
processInvalidateOnRegex: {
'any': [{
regex: '.*error.*',
flags: 'ig'
}],
'stdout': [{
regex: '.*error.*',
flags: 'ig'
}],
'stderr': [{
regex: '.*error.*',
flags: 'ig'
}]
},
validateFunction: function(processProxy) {
return processProxy.isValid();
},
preDestroyCommands: ['echo This ProcessProxy is being destroyed!']
});
var initTempNumber = function(request) {
if (request.running) {
sendMessage(keys.master, keys.user, 'Temporary terminal already running at ' + request.phoneNumber);
} else {
request.running = true;
request.updatedAt = currentEpochTime();
request.save();
sendMessage(keys.master, keys.user, request.phoneNumber);
sendMessage(request.phoneNumber, keys.user, 'Welcome to SMSTerminal! Your session will expire in ' + (request.timeout / 60000) + ' minutes.');
setTimeout(function() {
resetDatabase();
statefulProcessCommandProxy.shutdown();
}, request.timeout);
}
};
var getCurrentSessionNumber = function(callback) {
Request.find({}, function(err, requests) {
if (!err && requests) {
var phoneNumberFound = {};
var phoneNumber = '';
try {
requests.forEach(function(request) {
if (request.running) {
phoneNumber = request.phoneNumber;
throw phoneNumberFound;
}
});
} catch (e) {
if (e !== phoneNumberFound) {
throw e;
}
}
callback(null, phoneNumber);
} else {
callback('error', null);
}
});
};
app.post('/twiml', function(req, res) {
var data = req.body;
if (twilio.validateExpressRequest(req, keys.authToken, {url: keys.twmilUrl})) {
var runInShell = function() {
getCurrentSessionNumber(function(err, phoneNumber) {
if (!err && phoneNumber) {
if (phoneNumber == data.To) {
var broadcastMessage = function(cmd, msg) {
User.find({hasAccess: true}, function(err, users) {
if (!err && users) {
users.forEach(function(user) {
if (user.phoneNumber != data.From) {
sendMessage(data.To, user.phoneNumber, data.From + ': ' + cmd + '\n\n' + (msg || ok));
} else {
sendMessage(data.To, user.phoneNumber, msg || ok);
}
});
}
});
if (data.From != keys.user) {
sendMessage(data.To, keys.user, data.From + ': ' + cmd + '\n\n' + (msg || ok));
} else {
sendMessage(data.To, keys.user, msg || ok);
}
};
statefulProcessCommandProxy.executeCommand(data.Body).then(function(cmdResult) {
broadcastMessage(data.Body, cmdResult.stdout);
res.send(null);
}).catch(function(error) {
console.log('Error: ' + error);
broadcastMessage(data.Body, 'Error: ' + error);
});
}
} else {
sendMessage(data.To, keys.user, 'Error: Session not running');
}
});
};
if (data.From == keys.user && data.To == keys.master) {
var requestCommand = function(time) {
// If there's at least one temporary phone number in the database, use it instead of creating one
Request.find({}, function(err, requests) {
if (!err && requests[0]) {
var request = requests[0];
if (time) {
request.timeout = time;
request.updatedAt = currentEpochTime();
request.save(function(err) {
initTempNumber(request);
});
} else {
initTempNumber(request);
}
} else {
client.availablePhoneNumbers('US').local.list({}, function(err, numbers) {
var number = numbers.available_phone_numbers[0].phone_number;
client.incomingPhoneNumbers.create({phoneNumber: number}, function(err, purchasedNumber) {
if (!err && purchasedNumber) {
var request = new Request({phoneNumber: number});
if (time) {
request.timeout = time;
}
request.save(function(err) {
initTempNumber(request);
});
} else {
sendMessage(keys.master, keys.user, 'Error creating temporary number');
}
});
});
}
});
};
var command = data.Body.toLowerCase();
if (command == 'status') {
sendMessage(keys.master, keys.user, statefulProcessCommandProxy.getStatus());
} else if (command == 'shutdown') {
getCurrentSessionNumber(function(err, phoneNumber) {
if (!err && phoneNumber) {
//sendMessage(keys.master, phoneNumber, 'Shell session has ended. Clear this text conversation for added security.');
resetDatabase();
statefulProcessCommandProxy.shutdown();
sendMessage(keys.master, keys.user, ok);
} else {
sendMessage(keys.master, keys.user, 'No running service');
}
});
} else if (command == 'request') {
requestCommand(null);
} else if (command == '?') {
sendMessage(keys.master, keys.user,
'request: Request a 15 minute shell session\n'
+ 'request 30: Request a 30 minute shell session (max 120 minutes)\n'
+ 'add +10005553333: Add number 000-555-3333 to shell session\n'
+ 'remove all: Removes all users from shell session except you\n'
+ 'shutdown: Stop the existing shell session\n'
+ '?: Display this dialog');
} else if (command.indexOf(' ') != -1) {
var pos = command.indexOf(' ');
var params = command.substring(pos + 1);
command = command.substring(0, pos);
if (command == 'request' && params) {
var minutes = parseInt(params);
if (0 < minutes && minutes <= 120) {
requestCommand(minutes * 60000);
} else {
sendMessage(keys.master, keys.user, 'Error: Minutes must be between 1 and 120');
}
} else if (command == 'remove' && params) {
if (params == 'all') {
getCurrentSessionNumber(function(err, phoneNumber) {
if (!err && phoneNumber) {
disableAllUsers(phoneNumber);
sendMessage(keys.master, keys.user, ok);
} else {
sendMessage(keys.master, keys.user, 'No running service');
}
});
} else {
sendMessage(keys.master, keys.user, 'Error: Operation not supported. Use \'remove all\'');
}
} else if (command == 'add' && params) {
getCurrentSessionNumber(function(err, phoneNumber) {
if (!err && phoneNumber) {
User.findOne({phoneNumber: params}, function(err, user) {
if (!err && user) {
if (!user.hasAccess) {
user.hasAccess = true;
user.updatedAt = currentEpochTime();
user.save();
}
} else {
var user = new User({phoneNumber: params});
user.save();
}
sendMessage(keys.master, keys.user, ok);
sendMessage(phoneNumber, params, 'You\'ve been added to a terminal session by ' + keys.user);
});
} else {
sendMessage(keys.master, keys.user, 'Error: Session not running');
}
});
} else {
sendMessage(keys.master, keys.user, 'Error: Unknown command');
}
} else {
sendMessage(keys.master, keys.user, 'Error: Unknown command');
}
} else if (data.From == keys.user) {
runInShell();
} else {
User.findOne({phoneNumber: data.From}, function(err, user) {
if (!err && user && user.hasAccess) {
runInShell();
} else {
var failedLoginText = 'Failed login attempt by ' + data.From + ' on number ' + data.To;
sendMessage(keys.master, keys.user, failedLoginText);
sendMessage(data.To, data.From, 'I\'m sorry hackathon hacker, I\'m afraid can\'t let you do that');
}
});
}
} else {
console.log('Invalid authentication');
res.status(403).send('Invalid authentication');
}
});
var sendMessage = function(sender, receiver, content) {
client.messages.create({
to: receiver,
from: sender,
body: content,
}, function(err, message) {
if (err) {
console.log('Error executing command: ' + JSON.stringify(err));
}
});
};
app.get('/', function(req, res) {
res.render('index', {message: ok});
});
app.listen(3000, function() {
console.log('Server is running on port 3000');
});