The basic problem is as follows:
Passing an object from my c# program, which is serialize and send through a socket. Achieved this in node.js/express application with socket.io.
Need to pass this to the client and using pug as the template engine.
Everything tried so far just doesn't seem to be working. Can't access the elements in the object. Pretty new to node and express so please bear with me.
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 routes = require('./app_server/routes/index');
var users = require('./app_server/routes/users');
var app = express();
var app = require('express')();
var server = require('http').Server(app);
var io = require('socket.io')(server);
server.listen(80);
// view engine setup
app.set('views', path.join(__dirname, 'app_server', 'views'));
app.set('view engine', 'jade');
// uncomment after placing your favicon in /public
//app.use(favicon(__dirname + '/public/favicon.ico'));
app.use(logger('dev'));
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));
app.use('/', routes);
app.use('/users', users);
io.on('connection', function (socket) {
socket.emit('news', { hello: 'world' });
socket.on('my other event', function (data) {
console.log(data);
});
});
// 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 handlers
// development error handler
// will print stacktrace
if (app.get('env') === 'development') {
app.use(function(err, req, res, next) {
res.status(err.status || 500);
res.render('error', {
message: err.message,
error: err
});
});
}
// production error handler
// no stacktraces leaked to user
app.use(function(err, req, res, next) {
res.status(err.status || 500);
res.render('error', {
message: err.message,
error: {}
});
});
module.exports = app;
layout.jade :
doctype html
html
head
meta(name='viewport', content='width=device-width, initial-scale=1.0')
title= title
link(rel='stylesheet', href='/bootstrap/css/amelia.bootstrap.css')
link(rel='stylesheet', href='/stylesheets/style.css')
script(src="https://cdn.socket.io/socket.io-1.4.5.js")
script.
var socket = io.connect('http://localhost');
socket.on('news', function (data) {
console.log(data);
socket.emit('my other event', { my: 'data' });
});
body
block content
script(src='/javascripts/jquery-1.11.1.min.js')
script(src='/bootstrap/js/bootstrap.min.js')
index.jade :
extends layout
block content
h1= title
p Welcome to #{title}
//THIS IS WHERE I DON'T KNOW HOW TO ACCESS THE OBJECT AND ITS PROPERTIES
Can see the object in the console so the data is appearing.
Tried many different variations, but nothing seems to be working. Any input or guidance would be welcome.
Thanks in advance.
Related
I am creating an upload/download app, i don't know why its only my app.js file is having this problem. I searched all other answers on the internet but still it did not solve the problem.
here is the code below:
var express = require('express');
var path = require('path'); // add path to set and get
var fs = require('fs'); // add filesystem
var connect = require('connect');
var favicon = require('serve-favicon');
var logger = require('morgan');
var cookieParser = require('cookie-parser');
var bodyParser = require('body-parser');
var connect = require('connect');
var http = require('http');
var routes = require('./routes/index');
var users = require('./routes/users');
//var upload = require('./routes/upload');
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(express.static(path.join(__dirname, 'public')));
app.use(express.static('public'));
app.use(express.static('files'));
app.use('/', routes);
app.use('/users', users);
//app.use('/upload',upload);
// 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 handlers
// development error handler
// will print stacktrace
if (app.get('env') === 'development') {
app.use(function(err, req, res, next) {
res.status(err.status || 500);
res.render('error', {
message: err.message,
error: err
});
});
}
// production error handler
// no stacktraces leaked to user
app.use(function(err, req, res, next) {
res.status(err.status || 500);
res.render('error', {
message: err.message,
error: {}
});
});
module.exports = app;
Thanks for your help.
check in your all files
make sure you don't miss export it
module.exports = router;
Router.use() at all times requires a Middleware function as an argument. Assuming your route to download some files from your server, it should Look similar to this.
var Router = express.Router();
function downloadFiles(request,response) {
// some code to dowload files
}
// The above function which takes request and response
// should be passed to Router.use()
Router.use(downloadFiles);
When you that error it means that what you passed to Router.use() is not a middleware function like downloadFiles.
I am new to Node.js (been doing ASP.Net for ages) and I cannot for the life of me figure out why I am getting this 404.
So in my work on this I have simplified the code down to just the bare minimum.
app.js for the service handler.
app.post('/getdocument', function (req, res) {
console.log('made it');
res.send('made it');
});
The code from the jade file
li: a(onclick="downloadfile('#{pdfUrl}');") Download PDF
And the onclick function
function downloadfile(url){
alert(url);
$.post('/getdocument', {data: url}, function (data) {
alert(data);
});
}
So I get the first alert that it made it into the function, then I get this in the log for the Node Server
POST /getdocument 404 81.910 ms - 1547
I am really at a loss as to why.
-- As Requested here is the entire 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 viewer = require('./routes/viewer');
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('/public', express.static(path.join(__dirname, 'public')));
app.use('/pdf', express.static(path.join(__dirname, 'public/pdf')));
app.use('/ViewerJS',express.static(path.join(__dirname, 'ViewerJS')));
app.use('/viewer', viewer);
app.post('/getdocument', function (req, res) {
console.log('made it');
res.send('made it');
});
// 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 handlers
// development error handler
// will print stacktrace
if (app.get('env') === 'development') {
app.use(function(err, req, res, next) {
res.status(err.status || 500);
res.render('error', {
message: err.message,
error: err
});
});
}
// production error handler
// no stacktraces leaked to user
app.use(function(err, req, res, next) {
res.status(err.status || 500);
res.render('error', {
message: err.message,
error: {}
});
});
module.exports = app;
So it all turned out to be an issue with Node server running. I had to restart to apply Windows updates and now it works.
Take care all!
I have an express v4 server with a route called admin. When the user post a password to the admin route, I want to respond by setting a cookie on the user's browser and sending a small json. For some reason, the server keeps returning error 500 when trying to respond. I'm assuming that this is something to do with the cookie as I can do "res.send()" without any problem. I'm new to express/nodejs so any help is appreciated.
admin.js
var express = require('express');
var router = express.Router();
var cookieParser = require('cookie-parser');
/* POST HANDLER */
router.post('/', function(req, res) {
var on = {'admin' : "on"};
res.cookie(cookie , 'cookie_on').send(on);
});
module.exports = router;
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 routes = require('./routes/index');
var admin = require('./routes/admin');
var blogposts = require('./routes/blogposts');
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(express.static(path.join(__dirname, 'public')));
app.use('/', routes);
app.use('/admin', admin);
app.use('/blogposts', blogposts);
// 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 handlers
// development error handler
// will print stacktrace
if (app.get('env') === 'development') {
app.use(function(err, req, res, next) {
res.status(err.status || 500);
res.render('error', {
message: err.message,
error: err
});
});
}
// production error handler
// no stacktraces leaked to user
app.use(function(err, req, res, next) {
res.status(err.status || 500);
res.render('error', {
message: err.message,
error: {}
});
});
module.exports = app;
Dumb mistake: Cookie should have been 'cookie'...
frontend.jade
doctype html
html
head
meta(charset='utf-8')
//if lt IE 9
script(type='text/javascript', src='http://ajax.googleapis.com/ajax/libs/jquery/1.11.3/jquery.min.js')
// [if gte IE 9] <!
script(type='text/javascript', src='http://ajax.googleapis.com/ajax/libs/jquery/2.1.4/jquery.min.js')
// <![endif]
script(type='text/javascript', src='http://ajax.aspnetcdn.com/ajax/globalize/0.1.1/globalize.min.js')
script(type='text/javascript',
script(type='text/javascript', src='javascripts/file1.js')
script(type='text/javascript', src='javascripts/file2.js')
body
#db(style='position:relative;')
#db2(style='position:relative;')
#pGC(style='height:800px; width:1000px; margin: 0 auto')
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 routes = require('./routes/index');
var users = require('./routes/users');
var info = require('./routes/info');
var app = express();
app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'jade');
app.use(logger('dev'));
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(require('stylus').middleware(path.join(__dirname, 'public')));
app.use(express.static(path.join(__dirname, 'public')));
app.use('/', routes);
app.use('/users', users);
app.use('/info', info);
// 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 handlers
// development error handler
// will print stacktrace
if (app.get('env') === 'development') {
app.use(function (err, req, res, next) {
res.status(err.status || 500);
res.render('error', {
message: err.message,
error: err
});
});
}
// production error handler
// no stacktraces leaked to user
app.use(function (err, req, res, next) {
res.status(err.status || 500);
res.render('error', {
message: err.message,
error: {}
});
});
module.exports = app;
info.js
var express = require('express');
var request = require('request');
var fs = require('fs');
var router = express.Router();
router.get('/', function (req, res) {
res.render('frontend');
});
module.exports= router;
When I add a parameter in the info.js like this
router.get('/:name',function (req,res) {
res.render('frontend');
}
now instead of looking for the static files in /javascripts/file1.js and /javascripts/file2.js
it is GET trans/javascriptsfile1.js and it returns a 404.
The files are located in public/javascripts/file1.js
In frontend.jade,
Change
script(type='text/javascript', src='javascripts/file1.js')
script(type='text/javascript', src='javascripts/file2.js')
to
script(type='text/javascript', src='/javascripts/file1.js')
script(type='text/javascript', src='/javascripts/file2.js')
The problem is that the javascript src is relative to rendered url (which is http://localhost/info). So, prepending it with '/' will make it start at the root url (http://localhost/) which express.static will serve the files in public folder.
When you call app.use your server will chain that function to every request. If you call next() in all your previous functions it'll eventually fall into this error function.
When you add the parameter, the request doesn't get caugh by the route and keep going through the middleware chain (and eventually to the error functions).
I created an express project using the express generator like following
express project_name
and
npm install
This is my 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 routes = 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(__dirname + '/public/favicon.ico'));
app.use(logger('dev'));
app.use(bodyParser.json());
app.use(bodyParser.urlencoded({ extended: false }));
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));
app.use('/', routes);
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 handlers
// development error handler
// will print stacktrace
if (app.get('env') === 'development') {
app.use(function(err, req, res, next) {
res.status(err.status || 500);
res.render('error', {
message: err.message,
error: err
});
});
}
// production error handler
// no stacktraces leaked to user
app.use(function(err, req, res, next) {
res.status(err.status || 500);
res.render('error', {
message: err.message,
error: {}
});
});
module.exports = app;
These are my routes
var express = require('express');
var router = express.Router();
/* GET home page. */
router.get('/', function(req, res, next) {
res.render('index', { title: 'iDanG Management' });
});
module.exports = router;
I have following index.jade
extends layout
block content
div.container
div.row
form(id='myform' action='' method='post')
p Name:
input(type='text' name='name')
p E-Mail:
input(type='text' name='email')
input(type='submit' value='add')
table(class='table table-hover' id='user_table')
thead
tr
th Name
th Email
tbody
script.
$(document).ready(
function() {
$('#user_table').dataTable({
"pagingType": "simple_numbers",
"ordering": false
});
$('#myform').ajaxForm({ beforeSubmit:
function (formData, jqForm, options) {
$('#table').DataTable().row.add([formData[0].value, formData[1].value]).draw();
return false;
}
});
});
And following layout.jade
doctype html
html
head
title= title
script(src="/javascripts/jquery-1.11.2.min.js")
script(src="/javascripts/jquery.form.js")
script(src="/javascripts/jquery.dataTables.min.js")
link(rel="stylesheet" href="//maxcdn.bootstrapcdn.com/bootstrap/3.3.2/css/bootstrap.min.css")
link(rel="stylesheet" href="/javascripts/jquery.dataTables.min.css")
body
block content
when I try to submit that form I receive following error:
Error: Not Found
at app.use.res.render.message (/home/ubuntu/iDanG_Management/app.js:30:13)
at Layer.handle [as handle_request] (/home/ubuntu/iDanG_Management/node_modules/express/lib/router/layer.js:82:5)
at trim_prefix (/home/ubuntu/iDanG_Management/node_modules/express/lib/router/index.js:302:13)
at /home/ubuntu/iDanG_Management/node_modules/express/lib/router/index.js:270:7
at Function.proto.process_params (/home/ubuntu/iDanG_Management/node_modules/express/lib/router/index.js:321:12)
at next (/home/ubuntu/iDanG_Management/node_modules/express/lib/router/index.js:261:10)
at /home/ubuntu/iDanG_Management/node_modules/express/lib/router/index.js:603:15
at next (/home/ubuntu/iDanG_Management/node_modules/express/lib/router/index.js:246:14)
at Function.proto.handle (/home/ubuntu/iDanG_Management/node_modules/express/lib/router/index.js:166:3)
at router (/home/ubuntu/iDanG_Management/node_modules/express/lib/router/index.js:35:12)
For the forms I used this
Do you have any suggestions how I can solve this problem? Help is highly appreciated!
It seems like you are doing a post request and your routes does not have post handler.
May be add route for post:
router.post('/', function(req, res, next) {
//do something and return data here?
});