Waiting for localhost when trying to connect to node js server - javascript

when i run this , i should be able to get mysite at localhost:3000 . but when i go to localhost:3000 it is not loading. chrome is still showing waiting for localhost. This is the code . It is a simple node js blog that uses mongo db. I got it from this github https://github.com/pankajwp/node-js-blog
This is the code for server. Please help
i will add my mongodb credentials to mongoose.connect.
var express = require('express');
var app = express();
var port = process.env.PORT || 3000;
var expressLayouts = require('express-ejs-layouts');
var mongoose = require('mongoose');
mongoose.connect('');
var Schema = mongoose.Schema;
app.use('/assests',express.static(__dirname + '/public'));
app.use(expressLayouts);
app.use((req, res, next) => {
res.locals.baseUrl = req.baseUrl;
next();
});
// by default express will look for static files inside the filder called views
app.set('view engine', 'ejs');
// Controllers
var pageController = require('./controllers/pageController');
var postController = require('./controllers/postController');
var adminController = require('./controllers/adminController');
var randomController = require('./controllers/randomController');
randomController(app);
adminController(app, Schema, mongoose);
postController(app, Schema, mongoose);
pageController(app, Schema, mongoose);
// Listen
app.listen(port);
console.log('Listening on localhost:'+ port);

Following thing is wrong
// Listen
app.listen(port);
console.log('Listening on localhost:'+ port);
Right away after calling listen, app does not listen immediately to the specified port.
The code should be like following
app.listen(port, function() {
console.log(`Listening on localhost: ${port}!`);
})
What is happening here, listening to a port is a asynchronous task. It is accepting some callback to let you know, what is the status of your listening to the port. If successful, then callback is called.
What your code was doing is, whether the listening to port is success of not, it always prints Listening on localhost: xxxx.
Example taken from directly Express Hello world.

Try This:
const express = require('express');
const ejs = require('ejs');
const expressLayouts = require('express-ejs-layouts');
const mongoose = require('mongoose');
const app = express();
const port = process.env.PORT || 3000;
//Create Object like this
const Schema = new mongoose.Schema({
//your properties name goes here like:
name: {
type:String
}
});
app.use('/assests',express.static(__dirname + '/public'));
app.use(expressLayouts);
app.use((req, res, next) => {
res.locals.baseUrl = req.baseUrl;
next();
});
// by default express will look for static files inside the filder called views
app.set('view engine', 'ejs');
// Controllers
var pageController = require('./controllers/pageController');
var postController = require('./controllers/postController');
var adminController = require('./controllers/adminController');
var randomController = require('./controllers/randomController');
randomController(app);
adminController(app, Schema, mongoose);
postController(app, Schema, mongoose);
pageController(app, Schema, mongoose);
//db connection
mongoose
.connect('url goes here, ({useUnifiedTopology: true, useNewUrlParser:true}))
.then(() => console.log('MongoDB connected!!!'))
.catch(err => console.log(err));
app.listen(port, (req, res) => console.log(`Server is running at ${port}`));

you can try with adding this code jsut after declaring your port number.
app.use(bodyParser.json());
your updated code should looks like below and it should work on http://localhost:3000
var express = require('express');
var app = express();
var port = process.env.PORT || 3000;
app.use(bodyParser.json());
var expressLayouts = require('express-ejs-layouts');
var mongoose = require('mongoose');
mongoose.connect('');
var Schema = mongoose.Schema;
app.use('/assests',express.static(__dirname + '/public'));
app.use(expressLayouts);
app.use((req, res, next) => {
res.locals.baseUrl = req.baseUrl;
next();
});
// by default express will look for static files inside the filder called views
app.set('view engine', 'ejs');
// Controllers
var pageController = require('./controllers/pageController');
var postController = require('./controllers/postController');
var adminController = require('./controllers/adminController');
var randomController = require('./controllers/randomController');
randomController(app);
adminController(app, Schema, mongoose);
postController(app, Schema, mongoose);
pageController(app, Schema, mongoose);
// Listen
app.listen(port);
console.log('Listening on localhost:'+ port);

Related

Express js router not working

This is my home.js code
// import modules
var express = require('express');
var mongoose = require('mongoose');
var bodyparser = require('body-parser');
var cors = require ('cors');
var path = require ('path');
var app = express();
const route= require('./routes/route');
//port no
const port =3000
app.use(cors());
app.use(bodyparser.json());
//static files
app.use(express.static(path.join(__dirname,'public')));
app.use('./api', route);
//testing server
app.get('/', (req,res)=>{
res.send('foober');
})
app.listen(port,()=>{
console.log('server started at port:' + port);
});
And this the route.js code
const express = require('express');
const router = express.Router();
router.get('/contacts', (req, res, next )=>{
res.send('retrieve contact');
});
module.exports =router;
But whenever I run 'localhost:3000/api/contacts' i get 'Cannot GET /api/contacts' error. I am very new at this, what am I doing wrong?
A dot in an url is there to seperate domains, if your route is mounted at ./api you would have to visit yourserver.com./api which won't work as the url is invalid.

How to use express middleware to handle all routes?

I have issue setting up routes for user in below code, I want to use express middleware and trying routes using app.use.
index.js is invoking user controller method once api's is being called So in below code i am trying to post data api/users from client but it returns 404.
How can i fix this issue using below routes setup ?
server.js
var express = require('express');
var app = express();
var bodyParser = require('body-parser');
var methodOverride = require('method-override');
var mongoose = require('mongoose');
console.log(mongoose.connection.readyState);
var db = require('./config/db');
var port = process.env.PORT || 8080;
mongoose.connect(db.url);
app.use(methodOverride('X-HTTP-Method-Override'));
app.use(express.static(__dirname + '/public'));
require('./app/routes')(app); // configure our routes
require('./config/express')(app);
app.listen(port);
console.log('listening on port ' + port);
exports = module.exports = app;
app > routes.js
module.exports = function(app) {
app.use('api/users', require('./api/user'));
app.get('*', function(req, res) {
res.sendfile('./public/views/index.html'); // load our public/index.html file
// res.sendFile(path.join(__dirname, ''../public/views/index.html''));
});
};
config > express.js
var express = require('express');
var morgan = require('morgan');
var bodyParser = require('body-parser');
// import cookieParser from 'cookie-parser';
// import errorHandler from 'errorhandler';
var path = require('path');
// import lusca from 'lusca';
var config = require('./db');
var mongoose = require('mongoose');
//var mongoStore = connectMongo(session);
module.exports = function(app) {
// app.engine('html', require('ejs').renderFile);
app.set('view engine', 'html');
app.use(bodyParser.urlencoded({ extended: false }));
app.use(bodyParser.json());
app.use(methodOverride());
}
User index where i will handle all crud operation for user
app > api > user > index.js
var express = require('express');
var controller = require('./user.controller');
var router = express.Router();
router.get('/', controller.index);
router.post('/',controller.create);
module.exports = router;
1st:
To handle all request
Bind application-level middleware to an instance of the app object by using the app.use() and app.METHOD() functions, where METHOD is the HTTP method of the request that the middleware function handles (such as GET, PUT, or POST) in lowercase.
This example shows a middleware function with no mount path. The function is executed every time the app receives a request.
app.use(function(req,res)
{
res.sendfile('./public/views/index.html');
console.log("Not found....I will handle *unhandle* rout here for you");
})
// app.get('*', function(req, res) use the above function instead of this
But this function at the end so it will only excute when no route path found to the app object.
Express documentation
2nd:
To handle createuser
var express = require('express');
var controller = require('./user.controller');
var router = express.Router();
// you must define route which you want to handle in user file
router.get('/api/user', controller.index);
router.post('/',controller.create);
module.exports = router;
Update working example with some explanation
Your app.js file
var express=require('express')
var app=express()
app.use('api/user',require('./user'))
app.use('/',require('./user'))
app.use(function(req,res)
{
res.sendfile('stack10.html')
console.log("Not found....I will handle *unhandle* rout here for you");
})
app.listen(8080,function()
{
console.log("server listening on port 8080")
})
user.js
var express = require('express')
var router = express.Router()
var app=express()
router.get('/api/user', function(req, res) {
res.send('respond for ..../api/user')
});
router.get('/',function (req,res) {
res.send('respose for ..../')
})
module.exports = router;
Your app.use will be app.use(api/user) while in user will be router.get(/api/user) so when u try http://127.0.0.1:8080/api/user
your response will be respond for ..../api/user

Node + Express JS API is not working

I'm a beginner in node.js but I try a little harder to setup a structure in node + express js.I start doing with the front-end and separate API structure.I put a single app.js for both API and front-end.But my API is not working. it gives error Cannot GET /api/users when i call http://localhost:3000/api/users. please help
api
-controllers
-helpers
-middlewares
-models
-routes.js
app.js
controllers
helpers
middlewares
models
node_modules
package.json
public
views
app.js
var express = require('express')
, app = express()
, bodyParser = require('body-parser')
, port = process.env.PORT || 3000
var path = require('path');
app.set('views', path.join(__dirname, 'views/'));
app.set('view engine', 'ejs')
app.use(express.static(__dirname + '/public'))
app.use(bodyParser.json())
app.use(bodyParser.urlencoded({extended: true}))
app.use(require('./controllers'))
var routes = require('./api/routes');
app.use('/api', routes);
app.listen(port, function() {
console.log('Listening on port ' + port)
})
routes.js
var express = require('express')
, router = express.Router()
var usersController = require('./controllers/users');
module.exports = function (app) {
app.get('/users', usersController.getUser);
};
module.exports = router;
users.js(controller)
module.exports = {
getUser: function (req, res) {
console.log("sdfdsfdsfsd");
res.setHeader('Content-Type', 'application/json');
res.send(JSON.stringify({"msg": "welcome user"}));
}
}
In your routes.js file you are exporting two things. Try to only export the router
var express = require('express')
, router = express.Router()
var usersController = require('./controllers/users');
router.get('/users', usersController.getUser);
module.exports = router;

Express routing error Cannot Get /api/name

Having some trouble setting up the restful API for my express app.
Here is my app.js:
var express = require('express'),
app = express(),
bodyParser = require('body-parser'),
methodOverride = require('method-override');
routes = require('./routes'),
api = require('./routes/api'),
port = process.env.PORT || 3000;
app.use(express.static(__dirname + '/public'));
app.use(bodyParser.json());
app.use(methodOverride());
app.use(bodyParser.urlencoded({extended: true}));
// Page Routes
app.get('/', routes.index);
app.get('/partials/:filename', routes.partials);
// // API Routes
app.get('/api/name', api.name);
app.listen(port, function() {
console.log('Listening on port ' + port);
});
In /routes/api.js I have the following test function:
exports.name = function (req, res) {
res.json({
name: 'Test'
});
};
Currently I get the following error when i go to http://my_ip/api/name
Cannot GET /api/name
Any ideas?
Thanks
The following code is working for me. I think there is some issue with your routes package. Can you share the code of 'routes' package and file structure ?
app.js
var express = require('express'),
app = express(),
routes = require('./routes');
api = require('./routes/api'),
port = process.env.PORT || 3000;
// Page Routes
app.get('/', routes.index);
// API Routes
app.get('/api/name', api.name);
app.listen(port, function() {
console.log('Listening on port ' + port);
});
/routes/api.js
exports.name = function (req, res) {
res.json({
name: 'Test'
});
};
/routes.js
exports.index = function (req, res) {
res.json({
name: 'Index'
});
};

How to get my node.js mocha test running?

I have developed a service in node.js and looking to create my first ever mocha test for this in a seperate file test.js, so I can run the test like this:
mocha test
I could not figure out how to get the reference to my app, routes.js:
var _ = require('underscore');
module.exports = function (app) {
app.post('/*', function (req, res) {
var schema={
type: Object,
"schema":
{
"totalRecords": {type:Number}
}
};
var isvalid = require('isvalid');
var validJson=true;
isvalid(req.body,schema
, function(err, validObj) {
if (!validObj) {
validJson = false;
}
handleRequest(validJson,res,err,req);
});
})
}
This is the server.js:
// set up ======================================================================
var express = require('express');
var app = express(); // create our app w/ express
var port = process.env.PORT || 8080; // set the port
var bodyParser = require('body-parser');
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({extended: true}));
app.use (function (error, req, res, next){
res.setHeader('content-type', 'application/json');
res.status(400);
res.json({
"error": "errormsg"
});
});
// routes ======================================================================
require('./routes.js')(app);
// listen (start app with node server.js) ======================================
app.listen(port);
console.log("App listening on port " + port);
And finally test.js:
"use strict";
var request = require('supertest');
var assert = require('assert');
var express = require('express');
var app = express();
describe('testing filter', function() {
it('should return an error', function (done) {
request(app)
.post('/')
.send({"hh":"ss"})
.expect(400,{"error": "errormsg"})
.end(function (err, res) {
if (err) {
done(err);
} else {
done();
}
});
});
});
Create a separate file called app.js. The only purpose of this file would be to run the server. You'll also need to export your app object from server.js. So, your server.js would look like this
// set up ======================================================================
var express = require('express');
var app = express(); // create our app w/ express
var port = process.env.PORT || 8080; // set the port
var bodyParser = require('body-parser');
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({extended: true}));
app.use (function (error, req, res, next){
res.setHeader('content-type', 'application/json');
res.status(400);
res.json({
"error": "errormsg"
});
});
// routes ======================================================================
require('./routes.js')(app);
module.exports = app;
Create a new file called app.js and put this inside of it
var app = require('./app');
var port = process.env.port || 8000;
app.listen(port, function() {
console.log("App listening on port " + port);
});
Now, inside of your test file, import your app as follows
var request = require('supertest');
var assert = require('assert');
var app = require('./app.js');
....
Note that I assume all your files are in the same directory. If you've put your test file in a different folder then you'll need to give the right path while requiring your app object.

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