Global function in app express.js - express

Question

Trying to use a function in app, that can be called in actions.
Put in app.locals doesn't work :
app.locals({
"form_tag" : helpers.form_tag,
"text_field_tag":helpers.text_field_tag,
sendHttpGs: function(req,res) {
var querystring = require('querystring');
var data = querystring.stringify({
idSong: req.params.idSong
});
var data = querystring.stringify({
track: req.body.track
});
var options = {
host: 'localhost',
port: 8888,
path: '/exo/playlists/searchIndex.php',
method: 'POST',
headers: {
'Content-Type': 'application/x-www-form-urlencoded',
'Content-Length': Buffer.byteLength(data)
}
};
var reqSong = http.request(options, function(ret){
ret.setEncoding('utf8');
ret.on('data', function(chunk){
req.session.search.push(JSON.stringify(chunk));
res.render('search.ejs', {
tracks: chunk,
title: req.session.search
});
});
});
reqSong.write(data);
reqSong.end();
}
});
This part is for sending http post to a php file that gets login and search function.
Where should I put it in order to use it like
.post('/loggedin', function(req,res){
global.sendHttpGS(req,res);
})

Answer 1

You can attach a function to the app object via app.set(), for example so something like this in your initialization code:
app.set('sayHello', function(res) {
return "hello";
});
Then in your routes, the function will be available via req.app.settings:
req.app.settings.sayHello(res);