Express JS router

http://stackoverflow.com/questions/43061791/how-to-combine-express-and-angular-routes
Back end routing : Routes defined to fetch/update data.

Front end routing : Routes defined as per the page which shall be shown to user.

So lets say we have two pages , home page and profile page

so, front end routes will have two pages

"/home" loading home page "/profile" loading profile

now on each of the page, you would need to show some data inside the html page, for which you make routes :

"/getHomePageData" route to return some news feed (lets say) "/getProfilePageData" route to return some user related information

http://stackoverflow.com/questions/14934452/how-to-get-all-registered-routes-in-express
http://stackoverflow.com/questions/35749288/separate-file-for-routes-in-express

console.log(app._router.stack); // Express >= 4.5.x

https://scotch.io/tutorials/keeping-api-routing-clean-using-express-routers

Sender's name, just include whatever string in the message. If you mean an ID to send a message, that's socket.id; you can send from server to a specific client using, IIRC, io.clients[id].emit

http://www.nickstefan.net/blog/view/express-routing

http://stackoverflow.com/questions/12943553/what-is-the-difference-between-a-node-js-express-route-and-a-controller

TDD 
https://webapplog.com/tdd/