Express.JS: how can I set response status by name rather than number?

Question

OK, everyone knows 200 is OK and 404 is not found. But I for things like permanent vs temporary redirect, or payment required, or other more exotic HTTP error codes, it might be better to do something like:

response.status('REQUEST_ENTITY_TOO_LARGE');

Rather than just use a magic number which is generally considered bad practice. I could, of course, have 413:'REQUEST_ENTITY_TOO_LARGE' in some object, but Express already has a copy of the status code -> name mappings and I'd rather not duplicate that.

How can I specify a response status by name in Express JS?

Edit: thanks @Akshat for pointing out http.STATUS_CODES. Elaborating on his answer, since the values are themselves unique, one can run:

   var statusCodeByName = {};
   for ( var number in http.STATUS_CODES ) {
     statusCodeByName[http.STATUS_CODES[number]] = number
   }

Which allows one to:

  > statusCodeByName['Request Entity Too Large']
  '413'

Answer 1

There's a Node module just for this purpose: http-status-codes.

https://www.npmjs.org/package/http-status-codes

Here's what the documentation says:

Installation

npm install http-status-codes

Usage

var HttpStatus = require('http-status-codes');

response.send(HttpStatus.OK);
response.send(
    HttpStatus.INTERNAL_SERVER_ERROR, 
    { error: HttpStatus.getStatusText(HttpStatus.INTERNAL_SERVER_ERROR) }
);