node-common-errors v0.4.0

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

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);