Styjun

app.route('/users')
 .post(user.post)
 .get(user.get)
 .get(user.everyone)
 .put(user.update)
 .delete(user.delete);

I have ran into the problem of my function using two res.send, so I am getting the 'Error: cannot set header after they are sent.' error, to fix this I have turned it into two functions which I am trying to use two .get on the app.route, but it seems I can only use one as when I use two the second one doesn't work.

Is there a way I could use two .get on one app.route?
If not, what are my options to get around this problem?

You need to create separate routes for each api endpoint like this:

app.route('/users').get(req, res) => 
//Get all users
);

app.route('/users:/id').get(req, res) => 
 //Get specific user
);

app.route('/users').post(req, res) => 
 //Create new user
);

app.route('/users/:id').put(req, res) => 
 //Update user
);

app.route('/users/:id').delete(req, res) => 
 //Delete user
);

Once res.send is called, means your server has sent the response to the browser or whatever. you can't change the already sent response and its header.

You can use multiple callbacks on one route and one method(post,get)

An array of callback functions can handle a route. For example:

var cb0 = function (req, res, next) 
 console.log('CB0')
 next()


var cb1 = function (req, res, next) 
 console.log('CB1')
 next()


var cb2 = function (req, res) 
 res.send('Hello from C!')


app.get('/example/c', [cb0, cb1, cb2])

yes, you can use multiple HTTP requests either its .get or .post but with different params. or routes.