I'm developing a web application with MEAN stack and I want this scenario:
People can sign up and after that, They must have at least one company registered.
When they register a company, the base URL will be like these:
example.com/companyName/
example.com/companyName/members
example.com/companyName/settings
example.com/companyName/etc
So, my problem is, how can I use variables in my routes to match the user's registered company name?
Is it something like app.use('/'+companyName, routes); possible in app.js?
There is a piece of my code, just in case:
app.use(function (req, res, next) {
console.log('going to '+companyUrl);
next();
});
app.use('/'+companyUrl, routes);
I'm doing some works on other modules, and now, noStartupRestrict.theStartupUrl is companyName as it should be.
But the app is not using routes. it goes all the way down to 404 route.
Try this
app.use('/:companyName/something', function(req, res, next) {
console.log(req.params.companyName);
next();
})
Did you try?
app.js
...
var path = '/companyName';
app.use(path, routes);
...
Related
I am developing an application and I have defined my custom routes in a different way. I am using Web Storm IDE to develop and it has a specific folder of routes where all the routes are kept individually. I have the following code in my directory /routes/about.js file:
var express = require('express');
var router = express.Router();
/* GET home page. */
router.get('/', function(req, res, next) {
res.render('about', { title: 'About Us' });
});
module.exports = router;
Now in the app.js I have written the following code to include these route and use it:
var index = require('./routes/index');
var users = require('./routes/users');
var about = require('./routes/about');
app.use('/', index);
app.use('/users', users);
app.use('/about', about);
But when I click on about link, it does not open the page. Though, if I write the route in the app.js file directly as:
app.get('/about', function (req, res) {
res.render('about');
});
then it renders the page. Also, if I do not make separate routes and use the default routes file (/routes/index.js) and include this in that file, then also the code works fine. Can anyone explain or tell is there any mapping of these route files done which is missed by me, or I am doing something syntactically wrong
You probably created a route for /about/about. To fix, change the about router from this:
router.get('/about', ...);
to this:
router.get('/', ...);
This, then goes with:
app.use('/about', router);
which already includes the /about path. Everything in that router will already have /about at the beginning of the path.
Use below code in about file
app.get('/', function (req, res) {
res.render('about');
});
You have already defined '/about' route in main file so if you want to render page on '/about' so you need to define route like this '/' in about page.
For example route '/about/us' then function will be in about page :
app.get('/us', function (req, res) {
res.render('about us');
});
The method to redirect the route is correct, but you have not pass the route to app.
so you just need to do is ,
router.use('/about', about);
app.use('/', router);
Like wise add router in app
I have an app where certain pages require that the user be logged in.
I am not sure if there is something built in for this, but what I have for doing this is as follows:
app.use((req, res, next) => {
if (req.session.username) {
app.get('/project/create', projectCtrl.create)
app.get('/project/create/save', projectCtrl.save)
} else {
return res.redirect('/')
}
next()
})
Is this the correct way of doing this, or is there a better way in express? The way I am doing it kind of feels a little hacky.
Yes, that's one correct way of doing it. What you have is an application-level middleware in express. It gets called for every request the application receives.
You can extract the username check and apply that as a route middleware substack. This way the middleware only gets executed for the routes it's applied to.
function gatePass(req, res, next) {
if(req.session.username) {
next();
}
else {
return res.redirect('/');
}
}
app.get('/project/create', gatePass, projectCtrl.create)
app.get('/project/create/save', gatePass, projectCtrl.save)
You can take this a bit further if you'll like to separate concerns by using express router together with route-level middleware. This also applies a middleware directly to the routes.
var router = express.Router();
router.use('/project/create', gatePass);
router.use('/project/create/save', gatePass);
router.get('/project/create', projectCtrl.create);
router.get('/project/create/save', projectCtrl.save);
app.use('/', router);
this solution work. It's not the best but for small project it will be good. The only drawback is that you will need to define every route you want to be check with a session.
Nodejs is the world of middleware, so why not use one? I think it's the best thing to do.
Verify is a file where I export my middleware and I apply it on all my router.. (in this case it's just to check if the user is logged or not)
var verify = require('./verify');
router.all('/*', verify.isLogged, function(req, res, next) {
if(req.decoded._doc.isLogged == "") {
next();
}
else {
res.json("error");
}
});
This way, if in the future you need to check one thing, then another one, you will just need to call you function where you want to check
router.get('/test', verify.isLogged, verify.isAdmin function(req, res, next) {
if(req.decoded._doc.isAdmin == "") {
next();
}
else {
res.json("error");
}
});
I have these router declared in express.js, I wonder why the run user got triggered when I open localhost:3000/myname/profile.
router.get('/:username', function(req, res, next)
{
console.log('run user')
});
router.get('/:username/profile', function(req, res, next)
{
console.log('run user profile')
});
I expect it won't,how to solve that?
please anyone help me?
Thank you in advance....
Just rearrange the code as shown below and your code should work fine.
router.get('/:username/profile', function(req, res, next)
{
console.log('run user profile')
});
router.get('/:username', function(req, res, next)
{
console.log('run user')
});
The issue is with the order in which the routes are defined, Since both the routes have /:username when you hit http://localhost:3000/myname/profile., the first route is given preference since it matches the uri.
Also refer this stackoverflow post on express route naming and ordering -
Node.js Express route naming and ordering: how is precedence determined?
Are you sure about that? I tried your code and it triggered run user profile.May you should show the all code.
I am working on a Node app that uses Express. In this app, I have the following:
app.use('/', function(req, res) {
res.render('index', {});
});
This route works fine for the positive case. However, it fails for the negative case. For example, If I visit "http://www.example.com/404", I still see the index page. In reality, I want it to fall through so that the Express Error handler tackles the error.
How do I change my route so that when a person visits the root of my app, they see the home page. yet, if they enter anything else, they'll see the 404 page?
You want to use app.get() (or possibly app.all()), not app.use():
app.get('/', function(req, res) {
res.render('index', {});
});
The reason why app.use('/', ...) matches /404 is explained here:
A route will match any path that follows its path immediately with a “/”. For example: app.use('/apple', ...) will match “/apple”, “/apple/images”, “/apple/images/news”, and so on.
You can define middleware to specifically handle errors.
Express error-handling middleware takes four arguments and should be defined after all your other routes:
app.use('/', function(req, res) {
res.render('index', {});
});
app.use(function(err, req, res, next) {
console.error(err.stack);
res.status(500).send('Something broke!');
});
I have a Jade file that all of my templates extend called layout.jade. In it I want to be able to have a logout button if the user is currently logged in (this is kept track of in req.session).
So layout.jade will have something like,
-if (loggedin)
a.navButton(href="/logout") Log Out
The route for a page would look something like,
app.get("/foo", function(req, res) {
res.render("foo", {loggedin: req.session.isValidUser});
});
The thing is, I don't want to have to populate the loggedin variable manually in every single route. Is there a way I can use Express middleware to automatically set some default options for the object sent to res.render? Or is there a better method to do this?
Basically I'm asking how I can have some set of variables always sent to templates, as well as the ability to have certain custom variables available in certain templates by manually setting them in the routes.
It seems this is actually a documented feature I just had trouble finding, unless anyone has a better way of doing it; From the latest Express documentation,
app.locals: Application local variables are provided to all templates
rendered within the application. This is useful for providing helper
functions to templates, as well as app-level data.
So in my login success function has,
req.session.username = profile.username;
app.locals.username = profile.username;
My logout function,
app.get('/logout', function (req, res) {
delete app.locals.username;
req.session.destroy();
res.redirect('/login');
});
And finally in layout.jade/all of my templates,
- if(username)
a.navButton(href="/logout") Logout
If you set res.locals.loggedin in the /login route, as hexacyanide suggests, this local will not be available in the route for /foo. res.locals is cleared upon every request.
you could instead try placing this above other routes:
app.all('*', function(req, res, next){
if(req.user){
res.locals.loggedin = true;
res.locals.currentuser = req.user;
};
next();
});
Pretty sure that if you modify req.user during your route, the res.locals.currentuser that you set before won't updated to be the new req.user. but not certain about that.
I actually use a custom render function for each page where I render a template, it looks like this:
function myRender(templateName){
return function(req, res){
res.locals.currentuser = req.user || null;
res.render(templateName);
};
};
and I use it like this:
app.get('/foo'
, function(req, res, next){
res.locals.bar = req.query['bar'] || "";
console.log('passing request to myRender middleware');
next();
}
, myRender('foo-jade-template')
)
This has the advantage of only setting res.locals.currentuser when I am ready to render something, instead of before executing my route. So if I change req.user it is guranteed to have the most recent version at render time.
There is a line of code that is rather useful to you in the Express source:
// merge res.locals
options._locals = self.locals;
Therefore, when you run res.render(), Express will also take any locals that are stored in res.locals and pass them into the render. Therefore, all you have to do is set res.locals.loggedin to true, and then run res.render() as usual.
app.get('/login', function(res, res) {
res.locals.loggedin = true;
});
app.get('/foo', function(req, res) {
res.render('foo', {});
});