HttpError
HTTP aware error class HttpError for all your Node.js applications.
Purpose
The HttpError serves two purposes. First to attach a status code to error
objects in one single operation, and second to encapsulate lower lever errors in
application specific errors that can be presented to users without decoupling or
loss of important technical details.
const HttpError = require('http-error');
const express = require('express');
const app = express();
app.get('/some/route', function(req, res, next) {
db.get({…}, function(err, data) {
if (err) {
return next(new HttpError('Database Query Failed', 500, err));
}
if (!data) {
return next(new HttpError('Object Not Found', 404));
}
// do work here
});
});
app.use(function(req, res, next, httpError) {
// print system errors to stderr
if (httpError.code > 500) {
if (httpError.error) {
console.error(httpError.error.message);
console.error(httpError.error.stack);
} else {
console.error(httpError.message);
console.error(httpError.stack);
}
}
res.status(httpError.code);
res.end();
});