When I put down:

app.listen(2000);

It works when I go to localhost:2000

But when I try to run

app.listen(80).

 I get an error

 

events.js:154

      throw er; // Unhandled 'error' event

      ^

 

Error: listen EACCES 0.0.0.0:80

    at Object.exports._errnoException (util.js:856:11)

    at exports._exceptionWithHostPort (util.js:879:20)

    at Server._listen2 (net.js:1223:19)

    at listen (net.js:1272:10)

    at Server.listen (net.js:1368:5)

    at EventEmitter.listen (/Users/ashleyvo/node_modules/express/lib/application.js:617:24)

    at Object.<anonymous> (/Users/ashleyvo/Desktop/programming paradigms class/hw3/server.js:59:5)

    at Module._compile (module.js:413:34)

    at Object.Module._extensions..js (module.js:422:10)

    at Module.load (module.js:357:32)

Is it at all possible that you have another web server running? Such as apache tomcat or apache server... as part of your projects from another class or personal projects? Or maybe a different nodejs server that was running on that same port but wasn't shut down? My understanding is that you cannot have more than one server operating on the same port. Does that sound right Professor Sargent?

Also you may be able to get better information about the problem if you catch the error with a try catch block and print it.

Good luck!

I guess one way you could rule out the possibility of another server using that port would be to restart the machine. That should shutdown any running servers. Then if you still get the same error when running your project, we'll know it's a different problem.