如何在 Express.js 中共享控制器之间的公共逻辑？

Question

I had used the express to build my website, and I have a special require.I had set the routers as follow:

/* home */
app.get('/', function (req, res, next) {
    homeRacingHandle(req,res);
});

/* racing list */
app.get('/racing',function (req, res, next) {
    homeRacingHandle(req,res);
});

There is just a few differents between the home page and the racing list page . My method to process the common logic is like above.And the homeRacingHandle function according the variable isHome to decide which page to render.

    var location = req.path.split('?').toString();
    var isHome = location==='/' && true || false;

This method works for me.But I don't know wether is a good way to process.Are there any other best practice?

Answer 1

You could use currying to simplify this

curryHomeRacing = require('./handler');

/* home */
app.get('/', curryHomeRacing('home'));

/* racing list */
app.get('/racing', curryHomeRacing('racing'));

In another file handler.js

//in handler.js

module.exports = function curryHomeRacing(route){
    return function(req, res) {
        homeRacingHandle(req, res, route);
    };
}

function homeRacingHandle(req, res, route) {
    if (route === 'home') {
        //do home stuff
    } else if (route === 'racing') {
        //do racing stuff
    }
}