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connecting Neo4j to nodejs error

I am trying to set up neo4j databace to use with javescript code.
When I run my code, I keep getting this
PS C:\Users\futur\Documents\Coding\Neo4j> node app.js body-parser
deprecated undefined extended: provide extended option app.js:21:20
Server has started GET / 304 37.114 ms - - { Neo4jError: getaddrinfo
ENOTFOUND locthost locthost:7687
at captureStacktrace (C:\Users\futur\Documents\Coding\Neo4j\node_modules\neo4j-driver\lib\v1\result.js:200:15)
at new Result (C:\Users\futur\Documents\Coding\Neo4j\node_modules\neo4j-driver\lib\v1\result.js:73:19)
at Session._run (C:\Users\futur\Documents\Coding\Neo4j\node_modules\neo4j-driver\lib\v1\session.js:122:14)
at Session.run (C:\Users\futur\Documents\Coding\Neo4j\node_modules\neo4j-driver\lib\v1\session.js:101:19)
at C:\Users\futur\Documents\Coding\Neo4j\app.js:31:4
at Layer.handle [as handle_request] (C:\Users\futur\Documents\Coding\Neo4j\node_modules\express\lib\router\layer.js:95:5)
at next (C:\Users\futur\Documents\Coding\Neo4j\node_modules\express\lib\router\route.js:137:13)
at Route.dispatch (C:\Users\futur\Documents\Coding\Neo4j\node_modules\express\lib\router\route.js:112:3)
at Layer.handle [as handle_request] (C:\Users\futur\Documents\Coding\Neo4j\node_modules\express\lib\router\layer.js:95:5)
at C:\Users\futur\Documents\Coding\Neo4j\node_modules\express\lib\router\index.js:281:22
code: 'ServiceUnavailable', name: 'Neo4jError' }
Here is what my code looks like
var express = require("express");
var path = require("path");
var logger = require("morgan");
// var cookieParser = require("cookie-parser");
var bodyParser = require("body-parser");
var neo4j = require("neo4j-driver").v1;
var app = express();
//
// <script src="lib/browser/neo4j-web.min.js"></script>
//view engine setup
app.set("views", path.join(__dirname, "views"));
app.set("view engine", "ejs");
app.use(logger('dev'));
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({extened: false}));
// app.use(cookieParser());
app.use(express.static(path.join(__dirname, "public")));
var driver = neo4j.driver("bolt://locthost", neo4j.auth.basic("neo4j", "test"));
var session = driver.session();
//home route
app.get('/', function(req, res){
session
.run("MATCH (n) RETURN n")
.then(function(result){
result.records.forEach(function(records){
console.log(records._fields[0]);
});
})
.catch(function(error){
console.log(error);
});
res.render("index");
});
app.listen(3000);
console.log('Server has started');
module.export = app;
What do I need to do?

You may have a typo in your bolt URI.
If your code is running on the same machine as the neo4j server, try changing locthost to localhost.

Error: Cannot find module on visual studio code (node server.js)

I'm working on a project and I need to make the node server.js work first before I proceed to check it elsewhere. I am experiencing this error:
Error: Cannot find module 'C:\Users\xxxx\Desktop\xxx\xxxxxxx\xxxxxx\server.js'
at Function.Module._resolveFilename (module.js:469:15)
at Function.Module._load (module.js:417:25)
at Module.runMain (module.js:604:10)
at run (bootstrap_node.js:383:7)
at startup (bootstrap_node.js:149:9)
at bootstrap_node.js:496:3
here are my codes for server.js
"use strict"
const express = require('express');
const bodyParser = require('body-parser');
const routes = require('./routes/RouteFood');
var app = express();
var host = "127.0.0.1";
var port = 8080;
var startPage = "home.html";
app.use(express.static('./public'));
app.use(express.static('./public/js'));
app.use(express.static('./public/css'));
app.use(express.static('./public/images'));
app.use(bodyParser.urlencoded({ extended: true }));
app.use(bodyParser.json());
routes.routeFood(app);
function gotoIndex(req, res) {
console.log(req.params);
res.sendFile(__dirname + "/" + startPage);
res.sendFile(__dirname + "/" + "food.html");
}
app.get('/food.html', gotoIndex);
var server = app.listen(port, host, function() {
var host = server.address().address;
var port = server.address().port;
console.log("Example app listening at http://%s:%s", host, port);
});
Can someone help me to solve this? and tell me what the error is?

How to access io.emit() from routes/index? on express 4.15 [duplicate]

This question already has answers here:
express.js 4 and sockets with express router
(6 answers)
Closed 5 years ago.
bin/www.js
var server = http.createServer(app);
io = require('socket.io')(server);
io.on('connection', function(client) {
console.log('Client connected...');
client.on('join', function(data) {
console.log(data);
});
});
server.listen(port);
here i need to access or send messages or mongoose result via socket.io(i dont know it is possible or not?)
i need to send messages to client from routes/index.js page.
what i tried is,
module.exports.io = io; //(in `bin/www`)
and access thai io in index.js like this
var io=require('../bin/www');
io.on('connection', function(client) {
console.log('Client connected...');
client.on('join', function(data) {
console.log(data);
});
});
but it thows some error
io.on('connection', function(client) {
^
TypeError: io.on is not a function....
my need is ,
I want to send dynamic results to client when a route get called or send some mongoose query results to client using socket.io is it possible?
on express 4.15 var server = http.createServer(app); is on bin/www.js
app.js
var express = require('express');
var path = require('path');
var favicon = require('serve-favicon');
var logger = require('morgan');
var cookieParser = require('cookie-parser');
var bodyParser = require('body-parser');
var index = require('./routes/index');
var users = require('./routes/users');
var app = express();
// view engine setup
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'jade');
// uncomment after placing your favicon in /public
//app.use(favicon(path.join(__dirname, 'public', 'favicon.ico')));
app.use(logger('dev'));
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: false }));
app.use(cookieParser());
/*app.use(function(req, res, next) {
req.headers['if-none-match'] = 'no-match-for-this';
next();
});*/
//app.use(express.static(path.join(__dirname, 'public')));
app.use(express.static(path.join(__dirname, 'public'), {
maxAge: '30d',
setHeaders: function (res, path) {
res.setHeader('Cache-Control', 'public, max-age=14770')
}
}));
console.log("PATH"+path.join(__dirname, 'public'));
app.io = require('socket.io')();
app.io.on('connection', function(socket){
// do whatever you want
});
const userRoute = require('./routes/index')(app.io);
app.use('/', userRoute);
app.use('/users', users);
// catch 404 and forward to error handler
app.use(function(req, res, next) {
var err = new Error('Not Found');
err.status = 404;
next(err);
});
// error handler
app.use(function(err, req, res, next) {
// set locals, only providing error in development
res.locals.message = err.message;
res.locals.error = req.app.get('env') === 'development' ? err : {};
// render the error page
res.status(err.status || 500);
res.render('error');
});
module.exports = app;
Error after update the code given by Ashish
PATHC:\Users\ADSS\Desktop\PrintAdmin\public
C:\Users\ADSS\Desktop\PrintAdmin\node_modules\express\lib\router\index.js:635
return fn.apply(this, arguments);
^
TypeError: Cannot read property 'apply' of undefined
at
C:\Users\ADSS\Desktop\PrintAdmin\node_modules\express\lib\router\index.js:635:14
at next (C:\Users\ADSS\Desktop\PrintAdmin\node_modules\express\lib\router\index.js:210:14)
at Function.handle (C:\Users\ADSS\Desktop\PrintAdmin\node_modules\express\lib\router\index.js:174:3)
at router (C:\Users\ADSS\Desktop\PrintAdmin\node_modules\express\lib\router\index.js:47:12)
at Object. (C:\Users\ADSS\Desktop\PrintAdmin\app.js:46:44)
at Module._compile (module.js:570:32)
at Object.Module._extensions..js (module.js:579:10)
at Module.load (module.js:487:32)
at tryModuleLoad (module.js:446:12)
at Function.Module._load (module.js:438:3)
at Module.require (module.js:497:17)
at require (internal/module.js:20:19)
at Object. (C:\Users\ADSS\Desktop\PrintAdmin\bin\www:7:11)
at Module._compile (module.js:570:32)
at Object.Module._extensions..js (module.js:579:10)
at Module.load (module.js:487:32)

I guess you have generated the app using express generator which creates app.js and bin/www files, There is a circular dependency issue to use io object inside routes. Here's what you can do,
Inside app.js
app.io = require('socket.io')(); // initialize io, attach server in www
// use socket events here
app.io.on('connection', function(socket){
// do whatever you want
})
// you can pass app.io inside the router and emit messages inside route.
const userRoute = require('./routes/user')(app.io);
app.use('/users', userRoute);
Inside bin/www
var io = app.io;
var server = http.createServer(app);
io.attach(server);
Now here's how router looks like, user.js
module.exports = function(io){
router.get('/', function(req, res, next){
io.emit("message", "your message");
res.send();
})
// edited
return router;
}

Note: I havent practically tried it yet.
But Can u try this pattern instead?
In www.js
module.exports = function(io) {
io.on('connection', function(client) {
console.log('Client connected...');
client.on('join', function(data) {
console.log(data);
});
});
}
In index.js
var server = http.createServer(app);
io = require('socket.io')(server);
require('./wwww.js)(io);

TypeError : cannot read property 'method' of undefined in nodejs Application

I am developing a simple chat application using node.js and socket.io. When I am connecting to the socket.io then I face an error of "cannot read property 'method' of undefined".
Here is the app.js file code:-
var express = require('express'),
app = express(),
path = require('path')
cookieParser = require('cookie-parser')
session = require('express-session')
config = require('./config/config.js'),
ConnectMongo = require('connect-mongo')(session),
mongoose = require('mongoose').connect(config.dbURL),
passport = require('passport'),
FacebookStrategy = require('passport-facebook').Strategy,
rooms = [] ;
app.set('views', path.join(__dirname , 'views'));
app.engine('html', require('hogan-express'));
app.set('view engine', 'html');
app.use(express.static(path.join(__dirname,'public')));
app.use(cookieParser());
var env = process.env.NODE_ENV || 'development';
if(env === 'development'){
// dev specific settings
app.use(session({secret:config.sessionSecret, saveUninitialized : true, resave : true}));
} else {
//Production specific settings
app.use(session({
secret : config.sessionSecret,
saveUninitialized : true,
resave : true,
store : new ConnectMongo({
// url : config.dbURL, (for Avoiding two seperate connection)
mongooseConnection:mongoose.connections[0],
stringify : true
})
}));
}
app.use(passport.initialize());
app.use(passport.session());
require('./auth/passportAuth.js')(passport , FacebookStrategy , config , mongoose);
require('./routes/routes.js')(express,app ,passport , config);
/* app.listen (3000 , function(){
console.log("ChatUp working on the Port 3000");
console.log('Mode:'+ env);
}); */
app.set('port', process.env.PORT || 3000);
var server = require('http').createServer(app);
var io = require('socket.io').listen(server);
require('./socket/socket.js')(io,rooms);
server.listen(app.get('port' , function(){
console.log('Chat Up on Port : '+ app.get('port'));
}))
And Here is my Chatrooms.html srcipt :-
$(function() {
var host = '{{config.host}}';
var socket = io.connect(host + '/roomlist'); // http://localhost:3000/roomlist
socket.on('connect', function() {
console.log('Connection Established .. !');
})
})
JSON file contain "host":"http://localhost:3000"
But when I run the code there is an error :TypeError : cannot read property 'method' of undefined
Console Error :-
c:\Users\ANKUR SINGH\Desktop\node\Chat App\node_modules\express\lib\router\index.js:138
debug('dispatching %s %s', req.method, req.url);
^
TypeError: Cannot read property 'method' of undefined
at Function.handle (c:\Users\ANKUR SINGH\Desktop\node\Chat App\node_modules\express\lib\router\index.js:138:33)
at EventEmitter.handle (c:\Users\ANKUR SINGH\Desktop\node\Chat App\node_modules\express\lib\application.js:173:10)
at Server.app (c:\Users\ANKUR SINGH\Desktop\node\Chat App\node_modules\express\lib\express.js:38:9)
at Server.g (events.js:260:16)
at emitNone (events.js:67:13)
at Server.emit (events.js:166:7)
at emitListeningNT (net.js:1263:10)
at nextTickCallbackWith1Arg (node.js:444:9)
at process._tickCallback (node.js:366:17)
at Module.runMain [as _onTimeout] (module.js:432:11)
at Timer.listOnTimeout (timers.js:92:15)
How to get rid of this error. ??
Picture of : /router/index.js file :-
Error picture

After 9 hours of continuous struggling. I have the found the solution of my question.
The error code :-
app.set('port', process.env.PORT || 3000 );
server.listen(app.get('port' , function(){
console.log('Chat Up on Port : '+ app.get('port'));
}));
And the Correct code :-
var port = process.env.PORT || 3000;
server.listen(port, function () {
console.log('Updated : Server listening at port %d', port);
});
The reference link is:-
Correct Code reference

Your code would work. There is a missing ')'
app.set('port', process.env.PORT || 3000 );
server.listen(app.get('port') , function(){
console.log('Chat Up on Port : '+ app.get('port'));
});

if you are using app.js as express and start.js as the "npm start", all you have to do is to make sure the application was exported module.exports = app; and on the start.js you just have to require the module require('./app') this works fine.

Aren't you missing some commas when declaring your variables?
path = require('path')
cookieParser = require('cookie-parser')
session = require('express-session')
path = require('path'),
cookieParser = require('cookie-parser'),
session = require('express-session'),

Can't connect to mongo db via js

I wrote a code for integrating all types of social networking log ins with nodejs. Here is my server.js
// get all the tools we need
var express = require('express');
var app = express();
var port = process.env.PORT || 8080;
var mongoose = require('mongoose');
var passport = require('passport');
var flash = require('connect-flash');
var morgan = require('morgan');
var cookieParser = require('cookie-parser');
var bodyParser = require('body-parser');
var session = require('express-session');
var configDB = require('./config/database.js');
// configuration ===============================================================
mongoose.connect(configDB); // connect to our database
// require('./config/passport')(passport); // pass passport for configuration
// set up our express application
app.use(morgan('dev')); // log every request to the console
app.use(cookieParser()); // read cookies (needed for auth)
app.use(bodyParser()); // get information from html forms
app.set('view engine', 'ejs'); // set up ejs for templating
// required for passport
app.use(session({ secret: '234545671290eftg5678qwer235623' })); // session secret
app.use(passport.initialize());
app.use(passport.session()); // persistent login sessions
app.use(flash()); // use connect-flash for flash messages stored in session
// routes ======================================================================
//require('./app/routes.js')(app, passport); // load our routes and pass in our app and fully configured passport
// launch ======================================================================
app.listen(port);
console.log('The magic happens on port ' + port);
config/database.js
module.exports = {
'url' : 'mongodb://localhost27017:' // looks like mongodb://<user>:<pass>#mongo.onmodulus.net:27017/Mikha4ot
};
When I run node server, I get the following error:
events.js:72
throw er; // Unhandled 'error' event
^
Error: failed to connect to [[object Object]:27017]
at null.<anonymous> (/home/ajay/Desktop/NodeAuthentication/node_modules/mongoose/node_modules/mongodb/lib/mongodb/connection/server.js:555:74)
at emit (events.js:106:17)
at null.<anonymous> (/home/ajay/Desktop/NodeAuthentication/node_modules/mongoose/node_modules/mongodb/lib/mongodb/connection/connection_pool.js:156:15)
at emit (events.js:98:17)
at Socket.<anonymous> (/home/ajay/Desktop/NodeAuthentication/node_modules/mongoose/node_modules/mongodb/lib/mongodb/connection/connection.js:534:10)
at Socket.emit (events.js:95:17)
at net.js:834:16
at process._tickCallback (node.js:448:13)
I'm confused between these 2 lines:
var configDB = require('./config/database.js');
and
mongoose.connect(configDB); // connect to our database
Should I use
mongoose.connect(configDB.url); ??
How can I fix it?

There is a typo in config/database.js. You don't specify database name and colon must be between localhost and 27017:
module.exports = {
'url' : 'mongodb://localhost:27017/my-test-db' // looks like mongodb://<user>:<pass>#mongo.onmodulus.net:27017/Mikha4ot
};
In connect method you could put Object or String, so you should use it as propose in question:
mongoose.connect(configDB.url);