node-common-errors

Node Errors

Extended Node.JS Error classes, allowing you to easily handle common errors in a web application. Predefined error messages and codes will save you some time and boilerplate code.

Furthermore, it contains a common error handler middleware, which complements forming responses based on the errors that had been passed

Error types

Name	Message	Code	Payload	Signature
Common	null	400	null	message, code
Auth	Not authorized	401	null	message
Forbidden	Forbidden	403	null	message
NotFound	Not Found	404	null	message
BadRequest	Bad Request	400	null	payload
Uninitialized	Uninitialized	500	null
Internal	Internal Server Error	500	null	message

Usage

One of the many usage cases

var Errors = require('node-common-errors');
var express = require('express');
var app = express();
 
 
var router = express.Router();
 
// custom router, for now it's in the same file, but it's more
// and more common to have components-based web servers, so let's keep it
// that way
router
  .post('/register', function (req, res, next) {
    var body = req.body;
    var username = body.username;
    var password = body.password;
 
    if (!username) {
      return next(new Errors.BadRequest('missing.username'));
    }
 
    if (!password) {
      return next(new Errors.BadRequest('missing.password'));
    }
 
    if (password.length < 10) {
      return next(new Errors.BadRequest('password.small'));
    }
 
    // etc, we can do various check, you get the idea
 
    res.send('OK');
 
  });
 
 
app.use(router);
app.use(Errors.commonErrorHandler);