I am new to nodejs,I want to handle all routes and api from app/routes.js , I have router that i am using to get and post for the client. I dont see any response from server to client with below code, Any idea ?
app.js
var express = require('express');
var app = express();
var server = require('http').createServer(app);
var io = require('./app/io').initialize(server);
var ditconsumer = require('./app/consumers/ditconsumer');
ditconsumer.start(server);
server.listen(3000, function () {
console.log('Example app listening on port 3000!');
//stconsumer.start();
});
app/routes.js
var express = require('express');
var router = express.Router();
var dirDirectory = require('./app/serverfiles/ditDir');
module.exports = function(app){
router.get('/getAllFiles',function(req,res){
dirDirectory.readDirectory(function(logFiles){
res.json(logFiles);
console.log(logFiles);
});
});
//other routes..
}
so here is what you have done wrong
you have not require route app/route and use it as middleware
You must export router in app/routes.js
here is your changed code please try it and me know if it helped
var express = require('express');
var app = express();
var myroute=require('./app/routes.js');
app.use(myroute);
var server = require('http').createServer(app);
var io = require('./app/io').initialize(server);
var ditconsumer = require('./app/consumers/ditconsumer');
ditconsumer.start(server);
server.listen(3000, function () {
console.log('Example app listening on port 3000!');
//stconsumer.start();
});
app/routes.js
var express = require('express');
var router = express.Router();
var dirDirectory = require('./app/serverfiles/ditDir');
router.get('/getAllFiles',function(req,res){
dirDirectory.readDirectory(function(logFiles){
res.json(logFiles);
console.log(logFiles);
});
});
module.exports=router;
//other routes..
}
please do let me know if this solves your problem
Related
I'm trying to use Socket.io combined with Express.JS (using Express application generator).
I've found some aswers how to do this (Using socket.io in Express 4 and express-generator's /bin/www).My problem is that i cannot make use of the sockets inside the routes folder.
I can use them in the app.js and bin/www.js files. When i call the route index.js it just keeps loading the webpage for a long time without giving any errors.
bin/www.js
...
/**
* Create HTTP server.
*/
var server = http.createServer(app);
var io = app.io
io.attach( server );
...
app.js
...
// Express
var app = express();
// Socket.io
var io = socket_io();
app.io = io;
var routes = require('./routes/index')(io);
...
routes/index.js
module.exports = function(io) {
var app = require('express');
var router = app.Router();
io.on('connection', function(socket) {
console.log('User connected');
});
return router;
}
Here is a simple example on how to use Socket.io with Express that I made available on GitHub here:
https://github.com/rsp/node-websocket-vs-socket.io
The backend code is this:
var path = require('path');
var app = require('express')();
var http = require('http').Server(app);
var io = require('socket.io')(http);
app.get('/', (req, res) => {
console.error('express connection');
res.sendFile(path.join(__dirname, 'si.html'));
});
io.on('connection', s => {
console.error('socket.io connection');
for (var t = 0; t < 3; t++)
setTimeout(() => s.emit('message', 'message from server'), 1000*t);
});
http.listen(3002, () => console.error('listening on http://localhost:3002/'));
console.error('socket.io example');
See https://github.com/rsp/node-websocket-vs-socket.io/blob/master/si.js
As you can see here, I am creating the express app with:
var app = require('express')();
Then I create an http server with that app with:
var http = require('http').Server(app);
And finally I use that http server to create the Socket.io instance:
var io = require('socket.io')(http);
After running:
http.listen(3002, () => console.error('listening on http://localhost:3002/'));
it all works together.
You can see the entire example on GitHub with both backend and frontend code that works. It currently uses Express 4.14.0 and socket.io 1.4.8.
For anyone who still want to use socket.io and express http request. Easiest way is to create two seprate instance of http server listing to different ports. 1 for websockets and 2nd for api requests.
const express = require("express");
const app = express();
const httpServer = require("http").createServer(app);
const io = require("socket.io")(httpServer, {
path: '/'
});
// routes and io on connection
httpServer.listen(5000, () => {
console.log("Websocket started at port ", 5000)
});
app.listen(3000, () =>{
console.log("Http server listening at", 3000)
})
How can i read cookie on node js ??
var socket = require( 'socket.io' );
var express = require('express');
var app = express();
var server = require('http').createServer(app);
var io = socket.listen( server );
var port = process.env.PORT || 8000;
var mysql = require('mysql');
function parseCookies (request) {
var list = {},
rc = request.headers.cookie;
rc && rc.split(';').forEach(function( cookie ) {
var parts = cookie.split('=');
list[parts.shift().trim()] = decodeURI(parts.join('='));
});
return list;
}
http.createServer(function (request, response) {
// To Read a Cookie
var user_id= cookies.realtimeid;
console.log(user_id);
});
server.listen(port, function () {
console.log('Server listening at port %d', port);
var cookies = parseCookies();
console.log(cookies);
});
I am new on node and socket. I have to read cookie value that is set by codeignter.
How can i send header request on parseCookies from server.listen.
I see you are using express, so I suggest you to use the very well known module for it. cookie-parser https://www.npmjs.com/package/cookie-parser
Installation
npm install cookie-parser
HOW TO USE IT
var express = require('express')
var cookieParser = require('cookie-parser')
var app = express()
app.use(cookieParser())
So basically after your mysql require you can do app.use(cookieParser())
And then in every request you do in the req variable you will find the cookies with req.cookies
Example
var express = require('express')
var cookieParser = require('cookie-parser')
var app = express()
app.use(cookieParser())
app.get('/', function(req, res) {
console.log("Cookies: ", req.cookies)
})
app.listen(8080)
How start app in express js (nodejs)? TypeError:app.set is not a function.
Console.log screen
var express = require('express');
var app = express();
app.get('/', function (req, res) {
res.send('Hello World!');
});
var server = app.listen(3000, function () {
var host = server.address().address;
var port = server.address().port;
});
Solved a problem:
1. add module.exports = app;
Taking the following basic Express: 'Hello World' example as my starting point:
var express = require('express');
var app = express();
app.get('/', function (req, res) {
res.send('Hello World!');
});
var server = app.listen(3000, function () {
var host = server.address().address;
var port = server.address().port;
console.log('App listening at http://%s:%s', host, port);
});
I'm trying to organize the code in different .js files to separate configuration and routing.
This way I would have app.js:
var express = require('express');
var app = express();
var server = app.listen(3000, function () {
var host = server.address().address;
var port = server.address().port;
console.log('App listening at http://%s:%s', host, port);
});
// Expose app
exports = module.exports = app;
and /routes/api.js (having api.js inside a child directory called routes):
var app = require('../app.js');
app.get('/', function (req, res) {
res.send('Hello World!');
});
but exports = module.exports = app; and var app = require('../app.js'); are not working: I get the message Cannot GET / all the time when calling the API method.
you should make app.js your 'main' file, and the routes should be inclulded in it.
your route file should look somthing like this:
var express = require('express');
var router = express.Router();
router.get('/', function (req, res) {
res.send('Hello World!');
});
module.exports = router;
and to your app.js add:
var api = require("./routes/api.js");
...
//all your code for creating app
...
app.use('/', api);
I'm trying to modularize my application files and I'm having problems with Socket.io. I would like to use the io inside my routes.js. Something like this:
var router = require('express').Router();
var io = require('./sockets/my-io');
router.get('/', function(req, res) {
io.emit('request-detected');
});
module.exports = router;
But I can't do, because the socket.io needs the app server, and when I'm inside the routes.js file, the app server is not listening or being exported yet.
Can you give me a solution, or any other approach to this problem?
Here's what I have, and if it's possible, I would like to keep the file structure:
app.js
var app = require('express')();
var routes = require('./routes');
/* ... */
app.use('/contacts', routes);
module.exports = app;
bin/www
#!/usr/bin/env node
var app = require('../wallet');
var server = app.listen(port, function() {
debug('Express is listening o port ' + port);
});
routes.js
var router = require('express').Router();
router.get('/', function(req, res) {
console.log('hey');
});
module.exports = router;
You can do it by passing the io variable to your routes module.
bin/www
#!/usr/bin/env node
var app = require('./app');
var server = app.listen(3000, function() {
console.log('Express is listening on port 3000');
}); // start the server
var socket = require('./socket')(server); // require socket.io code
var routes = require('./routes')(socket); // require routes
app.use('/', routes);
app.js
var express = require('express');
var app = express();
app.use(express.static(__dirname + '/public'));
app.set('views engine', 'ejs');
app.set('views', __dirname + '/');
module.exports = app;
socket.js
var socketio = require('socket.io');
function init(server) {
var io = socketio(server);
io.on('connection', function (socket) {
console.log("socket connected");
socket.on('newEvent', function (data) {
console.log(data);
});
});
return io;
}
module.exports = init;
routes.js
var express = require('express');
var route = express.Router();
function init(io) {
route.get('/', function (req, res) {
res.render('index.ejs', {});
setTimeout(function() {io.emit('newEvent', {message: "Hi from the server"})}, 2000);
});
return route;
}
module.exports = init;
The code above worked for me. However, I'm not sure why you want to do that.
Inside the router, you still have full control of what you want to send to the user via html, so you can just add the data to the html directly.
The idea of socket.io is that you can send data between the client and back once he has loaded the html and established a connection to your server with socket.io.
As you can see in the routes.js, I had to add a timeout to the emit. This is because the socket event will be emit before the browser has reloaded the page. In my case the browser logged the event and then immediately refreshed, losing the data you just sent.
Another problem is that you don't know anything about the socket of the client that is requesting the page because he hasn't connected yet. This means that calling io.emit() will send the event to all connected sockets.
As I said, this really depends on what exactly you want to do.
EDIT:
Instead of updating your contacts using ajax, you can do that with socket.io.
socket.js
var socketio = require('socket.io');
function init(server) {
var io = socketio(server);
io.on('connection', function (socket) {
console.log("socket connected");
socket.on('newContact', function (data, callback) {
// add data.contactName to db
// after adding something, you use the callback to
// send the added data back to the client
// callback(newContact);
});
});
return io;
}
module.exports = init;
index.html
<script type="text/javascript" >
var socket = io();
// call this emit when the user wants to add a contact
socket.emit('newContact', {contactName: name}, function(newContact) {
// here you will get the result from the server and you can
// update the html with jquery for example
});
</script>
If i understand your question correctly ,maybe you can try this way.
in your routes.js file
var app = require('./app');
var server = require('http').createServer(app);
var io = require('./sockets/my-io')(server);
var route = app.Router();
in your app.js file
var port = process.env.PORT || 3000;
app.listen(port,function(){
console.log('server on port ' + port)
})