I have some trouble to use Socket.io even just to test if a client is connected. I've tried many things and I think that my mistake is, maybe, when I do the app.get function. I have also tried to do this in an route js file but it wasn't conclusive neither. So here are my different codes :
App.js
/**
* Module dependencies.
*/
var express = require('express');
var routes = require('./routes');
var user = require('./routes/user');
var http = require('http');
var path = require('path');
var mongo = require('mongodb');
var monk = require('monk');
var db = monk('mongodb://xxxxx:xxxxx#ds051067.mongolab.com:51067/jdo');
var app = express(),
server = http.createServer(app) ,
io = require('socket.io').listen(server);
// all environments
app.set('port', process.env.PORT || 3000);
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'jade');
app.use(express.favicon());
app.use(express.logger('dev'));
app.use(express.json());
app.use(express.urlencoded());
app.use(express.methodOverride());
app.use(express.cookieParser('This is secret'));
app.use(express.session());
app.use(app.router);
app.use(express.static(path.join(__dirname, 'public')));
// development only
if ('development' == app.get('env')) {
app.use(express.errorHandler());
}
io.sockets.on('connection', function (socket) {
console.log('Un client est connecté !');
});
// app.get('/', routes.index);
app.get('/users', user.list);
app.get('/deplacement',routes.deplacement);
app.get('/monCompte', routes.compte);
app.get('/connexion', routes.connexion);
app.get('/', function(req, res) {
res.render('index.jade');
});
server.listen(app.get('port'), function(){
console.log('Express server listening on port ' + app.get('port'));
});
Index.jade
extends layout
block content
script(src="/socket.io/socket.io.js").
var socket = io.connect('http://localhost:3000');
});
PS : Sorry if my english is bad ^^
You can't use inline javascript in the same script tag as an included script.
extends layout
block content
script(src="/socket.io/socket.io.js")
script.
var socket = io.connect('http://localhost:3000');
Related
I wrote the code to receive data from the device using serial communication device with window.
I can see Continuous data in Console window in eclipse and save data in txt file.
Data transfer continues until the port is disconnected
I want to see time that Data is transmitted .
Finally, I want to get a time-data graph , so Time data is needed
How do I write code? The code below is the code I wrote
/**
* Module dependencies.
*/
var express = require('express')
, routes = require('./routes')
, user = require('./routes/user')
, http = require('http')
, path = require('path');
var app = express();
var SerialPort = require('serialport');
var UrlParser = require('url');
var fs = require('fs');
var readline = require('readline');
// all environments
app.set('port', process.env.PORT || 3000);
app.set('views', __dirname + '/views');
app.set('view engine', 'ejs');
app.use(express.favicon());
app.use(express.logger('dev'));
app.use(express.bodyParser());
app.use(express.methodOverride());
app.use(app.router);
app.use(express.static(path.join(__dirname, 'public')));
// development only
if ('development' == app.get('env')) {
app.use(express.errorHandler());
}
app.get('/', routes.index);
app.get('/users', user.list);
http.createServer(app).listen(app.get('port'), function(){
console.log('Express server listening on port ' + app.get('port'));
});
var port = new SerialPort("COM32" , {
baudRate:9600,
});
port.on("open" , function(){
console.log('open success');
});
port.on('data', function(data) {
converted_data = parseFloat(data);
console.log(converted_data);
fs.appendFile('TestDB.sql',converted_data + '\r\n',function(err) {
if(err)
console.log(err);
else
console.log('data->db');
});
});
port.write("mon 1\n", function(){
console.log('write to device');
});
app.get('/data', function (req,res) {
res.redirect('http://localhost:3000/data.html');
I'm trying to separate server initiation and other calls from the core file(app.js) but when I try to run it, it issues me error that
http.createServer(app).listen(app.get('port'), function(){
^
TypeError: Object function (){ all code from app.js file }
has no method 'get'
This is app.js file.
/**
* Module dependencies.
*/
module.exports = function(){
var express = require('express');
var routes = require('./routes');
var path = require('path');
var app = express();
// all environments
app.set('port', process.env.PORT || 4000);
app.set('views', __dirname + '/views');
app.set('view engine', 'jade');
app.use(express.favicon());
app.use(express.logger('dev'));
app.use(express.bodyParser());
app.use(express.methodOverride());
app.use(app.router);
app.use(express.static(path.join(__dirname, 'public')));
// development only
if ('development' == app.get('env')) {
app.use(express.errorHandler());
}
app.get('/', routes.index);
return app;
};
and this is server.js file.
var http = require('http'),
app = require('./app');
http.createServer(app).listen(app.get('port'), function(){
console.log('Express server listening on port ' + app.get('port'));
});
using express#3.4.0
what am I missing OR doing wrong.. please help.
You have no reason to return a function into your app.js file, just return the express object:
var express = require('express');
var app = express();
// ... more variables
// ... the rest of your code
module.exports = app;
Then, the rest of your code into server.js will work fine.
Remember that module.exports works like a "return" into CommonJS (and therefore NodeJS).
See documentation.
You're passing a function to module.exports, so when you require('./app'), you need to call it like a function:
var http = require('http'),
app = require('./app')();
http.createServer(app).listen(app.get('port'), function(){
console.log('Express server listening on port ' + app.get('port'));
});
I'm getting started on node JS and facing an issue with io lib, here the error :
ReferenceError: io is not defined
at exports.index (D:\dev\lib\index.js:9:5)
at callbacks (D:\dev\node_modules\express\lib\router\index.js:164:37)
at param (D:\dev\node_modules\express\lib\router\index.js:138:11)
at pass (D:\dev\node_modules\express\lib\router\index.js:145:5)
at Router._dispatch (D:\dev\node_modules\express\lib\router\index.js:1 73:5)
at Object.router (D:\dev\node_modules\express\lib\router\index.js:33:1 0)
at next (D:\dev\node_modules\express\node_modules\connect\lib\proto.js:190:15)
at Object.methodOverride [as handle] (D:\dev\node_modules\express\node_modules\connect\lib\middleware\methodOverride.js:49:5)
at next (D:\dev\node_modules\express\node_modules\connect\lib\proto.js:190:15)
at Object.urlencoded [as handle] (D:\dev\node_modules\express\node_modules\connect\lib\middleware\urlencoded.js:51:37)
Here is the content of my app.js file :
var express = require('express');
var path = require('path');
var app = express(),
server = require('http').createServer(app),
io = require('socket.io').listen(server),
fs = require('fs');
app.set('port', process.env.PORT || 8080); app.set('views',
path.join(__dirname, 'views'));
app.set('view engine', 'jade');
app.use(express.favicon()); app.use(express.logger('dev'));
app.use(express.json()); app.use(express.urlencoded());
app.use(express.methodOverride()); app.use(app.router);
app.use(express.static(path.join(__dirname, 'public')));
app.get('/', require('./lib').index);
server.listen(app.get('port'), function(){
console.log('Express server listening on port ' + app.get('port'));
});
my file lib/index.js :
exports.index = function(req, res){
res.render('index');
io.sockets.on('connection', function (socket) {
socket.emit('message', 'welcome');
});
};
Can anyone help me?
You need to pass io to your route:
exports.index = function(io) {
return function(req,res) {
res.render('index');
io.sockets.on('connection', function (socket) {
socket.emit('message', 'welcome');
}
}
}
And then call it as a function in app.get:
app.get('/', require('./lib').index(io));
I'd recommend declaring the require('./lib') part with your other variables. This would allow for code reuse and better readability (which is relative to each person).
var /*other variables*/,
lib = require('./lib');
Then you could just do app.get('/', lib.index(io));
Just a thought.
Here is the app.js file:
var express = require('express'),
routes = require('./routes'),
api = require('./routes/api.js'),
http = require('http'),
path = require('path');
var app= module.exports = express();
/**
* Configuration
*/
// all environments
app.set('port', process.env.PORT || 3001);
app.set('views', __dirname + '/views');
app.set('view engine', 'jade');
app.use(express.logger('dev'));
app.use(express.bodyParser());
app.use(express.methodOverride());
app.use(express.static(path.join(__dirname, 'public')));
app.use(app.router);
// development only
if (app.get('env') === 'development') {
app.use(express.errorHandler());
}
// production only
if (app.get('env') === 'production') {
// TODO
};
/**
* Routes
*/
// serve index and view partials
app.get('/', routes.index);
// redirect all others to the index (HTML5 history)
app.get('*', routes.index);
api(app);
/**
* Start Server
*/
http.createServer(app).listen(app.get('port'), function () {
console.log('Express server listening on port ' + app.get('port'));
});
Here is the routes/api.js file:
var queryObj = {
retrieve:{
api_path:'/api/test/list',
var_name:''
}
};
// All supporting functions used below are defined here !
module.exports = function(app) {
_.each(queryObj, function(obj) {
console.log("Check point 1");
var args = [obj.api_path, function(req, res){
var search_term = obj.var_name ? req.params[obj.var_name] : '';
get(search_term,res);
}];
console.log("Check point 2");
console.log("args:" + args);
app.get.apply(app,args);
});
};
Here is the routes/index.js file:
/*
* GET home page.
*/
exports.index = function(req, res){
console.log("Default view");
res.render('index');
};
So when i run this application and type localhost:3001/api/test/list in the browser, i get follwing output on the console:
Check point 1
Check point 2
`args: args:/api/alarms/list,function (req, res){
var search_term = obj.var_name ? req.params[obj.var_name] : '';
get(search_term,res);
}`
Express server listening on port 3001
Default view
My question is: why is app.get.apply() not working? Instead the default route configured in app.js is taken up!
I think you need to change the order of your route definitions: from most specific (in this case api/test/list to less specific *:
// defined api
api(app);
// serve index and view partials
app.get('/', routes.index);
// redirect all others to the index (HTML5 history)
app.get('*', routes.index);
I try to add socket IO to my project but I didn't manage to make it work.
my app.js
/**
* Module dependencies.
*/
var express = require('express');
var routes = require('./routes');
var user = require('./routes/user');
var http = require('http');
var path = require('path');
var app = express();
// all environments
app.set('port', process.env.PORT || 3000);
app.set('views', __dirname + '/views');
app.set('view engine', 'jade');
app.use(express.favicon());
app.use(express.logger('dev'));
app.use(express.bodyParser());
app.use(express.methodOverride());
app.use(app.router);
app.use(express.static(path.join(__dirname, 'public')));
// development only
if ('development' == app.get('env')) {
app.use(express.errorHandler());
}
app.get('/', routes.index);
app.get('/users', user.list);
var server = http.createServer(app).listen(app.get('port'), function(){
console.log('Express server listening on port ' + app.get('port'));
});
//IO Config
var io = require("socket.io").listen(server);
io.sockets.on('connection', function (socket) {
socket.emit('makealert');
});
my views:
extends layout
script(type='text/javascript' src='../node_modules/socket.io/lib/socket.io.js')
script(type='text/javascript'
var socket = io.connect();
socket.on('makealert', function () {
alert('Boom');
});
)
block content
h1= title
p Welcome to #{title}
my route:
exports.index = function(req, res){
res.render('index', { title: 'Express' });
};
I have 2 problems:
-first what's the way to find socket.io.js (in a jade view)
-second, is my app.js OK ?
-thrid, my console said:
SyntaxError:
Node/thrid_app/demo-express/views/index.jade:5
3| script(type='text/javascript' src='../node_modules/socket.io/lib/socket.io.js')
4|
5| script(type='text/javascript'
6| var socket = io.connect();
7| socket.on('makealert', function () {
Ty for yours helps
The error you have mentioned is due to syntax error in jade
change this line
script(type='text/javascript'
var socket = io.connect();
socket.on('makealert', function () {
alert('Boom');
});
)
to
script(type='text/javascript')
var socket = io.connect();
socket.on('makealert', function () {
alert('Boom');
});
Some mistakes in your code, also you seem to be using old jade syntax.
You are missing a comma in script(type='text/javascript' src='../'). It should be script(type='text/javascript', src='../')
Since jade 0.31, script must be used as script. or script(...).. Likewise for style.
Your last script tag in view is closed incorrectly
script(type='text/javascript'
...
)
Should be like this
script(type='text/javascript')
...