NodeJS include functions - node.js

Lets say I have the following NodeJS file:
var https = require("https");
var express = require("express");
var app = express();
var options = {};
var serverPort = 8443;
var server = https.createServer(options, app);
var io = require('socket.io')(server);
var numUsers = 0;
app.get('/', function(req, res){
res.sendFile('/home/domain/index.php');
});
io.on('connection', function(socket){
socket.on('user-login', function(data){
++numUsers;
});
socket.on('new message', function (msg,room) {
console.log(msg);
});
socket.on("disconnect", function() {
--numUsers;
});
});
server.listen(serverPort, function(){
console.log("\n--------------------------------");
console.log('Node HTTPs Server');
console.log('Currently Listening on port %d',serverPort);
console.log("--------------------------------");
});
Since I can't get SNI to work on my server, I'll have to go the old fashioned way and write a script for each subdomain. But what I'd like to do is have the functions inside of the io.on('connection', function(socket) {} area to be included. So not included like a class or anything like that, but literally the code is just taken from another file and processed as if it were in that file already. A lot like PHP does includes. Is this possible?

Simplest solution would be to read code using fs.readFile[Sync] and pass it to eval inside io.on('connection', function(socket) {})
io.on('connection', function(socket){
socket.on('user-login', function(data){
++numUsers;
});
socket.on('new message', function (msg,room) {
console.log(msg);
});
socket.on("disconnect", function() {
--numUsers;
});
// eval function loaded outside io.on('connection')
eval(someFunctionBody);
// or
eval(fs.readFileSync('path/to/function/body.js'));
});

Can't you just use require?
functions.js
function myFunc() {
console.log("I am a funky func");
}
module.exports = {
myFunc,
myOtherFunc,
};
index.js
var https = require("https");
var express = require("express");
// snip
var funcs = require('./functions');
io.on('connection', function(socket){
// snip
funcs.myFunc();
});

Related

how to attach socket.io to SwaggerExpress

I am using swaggerexpress middleware and swagger.
I can't get to work with socket.io
What is the proper way to attach socket.io to my server created?
'use strict';
var SwaggerExpress = require('swagger-express-mw');
var app = require('express')();
var io = require('./api/helpers/socketio');
module.exports = app;
var config = {
appRoot: __dirname
};
SwaggerExpress.create(config, function(err, swaggerExpress) {
if (err) { throw err; }
swaggerExpress.register(app);
app.listen(10010, function () {
console.log('Application is start listening on localhost:10010');
});
io.on('connection',function(socket){
console.log("A user is connected: " + socket.id);
io.emit('message', "Welcome")
});
});
io.attach(app);
With that approach, my server is not getting up, got an error on socket.io attaching to app.
If you're okay using a different port for socket.io, you could do something like this:
var io = require('socket.io')(10011);
// Or maybe in your case:
// var io = require('./api/helpers/socketio')(10011);
io.on('connection', function(socket) {
console.log('user connected');
});
On the client you'd connect to it like this:
var socket = io('http://localhost:10011');
socket.on('connect', function() {
console.log('Socket connection established');
});

In openshift Nodejs Socket.io responce 200 Ok, But console.log value not visible. my socket is working?

created index.js (server)
var express = require('express');
var app = express();
///creating server
var server = require('http').createServer(app);
var io = require('socket.io').listen(server, { origins:'http://nodejs-atnodejs.rhcloud.com:8000' });
below is remaining code
Routing to index.html page
app.get('/', function (req, res) {
console.log('in socket---' + res);
res.sendfile('index.html');
});
///socket connection
io.sockets.on('connection', function (socket) {
socket.on('chatmessage', function (msg) {
io.emit('chatmessage', msg);
console.log('in socket---' + data);
});
});
/// Listen to Openshift port
server.listen(process.env.OPENSHIFT_NODEJS_PORT, process.env.OPENSHIFT_NODEJS_IP);
created index.html(client)
src="http://nodejs-atnodejs.rhcloud.com:8000/socket.io/socket.io.js
var socket = io.connect('http://nodejs-atnodejs.rhcloud.com:8000');
console.log('this is index page');
socket.on('chatmessage', function (data) {
console.log('chatmessage---' + data);
socket.emit('chatmessage', { my: 'data' });
});
When accessed from browser:
Problem is not getting "console.log('chatmessage---' + data);" which is inside the socket..
and keep on getting xhr-polling../t=xxxxx responses..
is my socket working properly?
Both your browser and server code is listening for an event of 'chatmessage' after connection either your browser or server should be emitting the event first and than the other should be listening such as...
// server
io.sockets.on('connection', function (socket) {
socket.emit('chatmessage', /*some data*/);
});
//client
socket.on('chatmessage', function (data) {
console.log('chatmessage---' + data);
});

I'm unable to connect to socket

I'm trying to connect to a socket.But I did not get the socketid on the console.Is it the right way of connecting to a socket ?Can anyone please suggest me ...
My code :
var app = express();
var dir = process.cwd();
app.use(express.static(dir)); //app public directory
app.use(express.static(__dirname)); //module directory
var server =require('http').createServer(app);
var io = require('socket.io')(server);
io.of('/socket_issue').on('connection', function (socket) {
console.log("Socket connected :"+socket.id);
socket.emit('news', { hello: 'world' });
});
client code :
var socket = io('http://localhost:8085/socket_issue');
socket.on('connect', function(){ console.log('connected to socket'); });
socket.on('error', function(e){ console.log('error' + e); });
socket.on( 'news', function( data ){
console.log(data);
});
socket.on('disconnect', function(){});
You seem to not have a server.listen() in your backend code.
I've edited the server code and it functions correctly:
var app = require('express')();
var dir = process.cwd();
var server =require('http').createServer(app);
var io = require('socket.io')(server);
server.listen(8080);
app.get('/', function (req, res) {
res.sendfile(__dirname + '/index.html');
});
io.of('/socket_issue').on('connection', function (socket) {
console.log("Socket connected :"+socket.id);
socket.emit('news', { hello: 'world' });
});
Don't forget to change the port on the front-end and it'll work as expected:
Socket connected :Y7zi7dLRxqBA5nakAAAA

Can't seem to get socket io to display any emits

I've been trying to figure out why I can't get any emits to show up in my terminal and it seems that everything is running fine.... except for seeing the emits. Here is my code
var express = require('express');
var path = require('path');
// Create a new Express application
var app = express();
var views = path.join(process.cwd(), 'views');
app.use("/static", express.static("public"));
// Create an http server with Node's HTTP module.
// Pass it the Express application, and listen on port 3000.
var server = require('http').createServer(app).listen(3000, function() {
console.log('listening on port ' + 3000)
});
// Instantiate Socket.IO hand have it listen on the Express/HTTP server
var io = require('socket.io')(server);
var game = require('./game');
app.get('/', function(req,res) {
res.sendFile(path.join(views, 'index.html'));
});
io.on('connect', function(socket) {
io.emit('connection', { message: "You are connected!" });
game.initGame(io, socket);
socket.emit('connected', { message: "You are connected!" });
io.sockets.emit('test', 'test')
});
Any help would be great!
Emits are not automatically printed. socket.emit will send a message back to the client, not to the terminal. Use console.log("whatever") to print to the terminal:
io.on('connect', function(socket) {
console.log('Client connected');
socket.on('test', function(data) {
console.log("Got message of type 'test'containing data:", data);
});
});

xhr poll error come out is throwing while use socket.io

I wrote a very simple demo about socket.io And I package it by using phonegap. I found there is problem. After I open my app about ten seconds ,the connection will disconnect because of xhr poll error.if I refresh the page in disconnect event the error won't come again.
I use 1.2.0 version.here is my code. I already simplify it.
server:
var express = require('express');
var app = express();
var http = require('http').Server(app);
var io = require('socket.io')(http);
var path = require('path');
var cookieParser = require('cookie-parser');
var bodyParser = require('body-parser');
app.use(bodyParser.json());
app.use(bodyParser.urlencoded());
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));
io.sockets.on('connection', function (socket) {
console.log("disconnect--"+socket.id+"--"+io.sockets.server.eio.clientsCount);
socket.on('disconnect', function () {
console.log("disconnect--"+io.sockets.server.eio.clientsCount);
});
});
http.listen(80, function () {
console.log("server statrt");
});
client:
$(document).ready(function () {
var socket = io("http://192.168.0.106:80");
socket.on('connect', function () {
alert("connect");
});
socket.on('error', function (data) {
alert(data);
});
socket.on('disconnect', function () {
alert("disconnect");
});
socket.on("reconnect", function () {
alert("reconnect");
})
});
thanks for help.my English is not very good
You have to open the socket.io connection when the deviceready event is fired.
document.addEventListener('deviceready', function() {
var socket = io("http://192.168.0.106:80");
socket.on('connect', function() {
alert("connect");
});
socket.on('error', function (data) {
alert(data);
});
socket.on('disconnect', function () {
alert("disconnect");
});
socket.on("reconnect", function () {
alert("reconnect");
});
});
Socket.io example
For those of you using Google Chrome, FYI Chrome does not fire 'deviceready'. Instead you should use 'DOMContentLoaded'.

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