express-error-handling-examples.js

express-error-handling-examples.js

var express = require('express');
var app = express();

app.get('/', function (req, res) {
        res.send('hello world! '
                + '<br/><a href="error">An example throwing error</a>'
                + '<br/><a href="error-handled">An example throwing error, but handled').end();
});

app.get('/error', function (req, res) {
        JSON.parse('invalidJSON');
});

app.get('/error-handled', function (req, res) {
        JSON.parse('invalidJSON');
});

// Error handler registered at last to catch all errors thrown
// Reference: http://expressjs.com/guide/error-handling.html
app.use('/error-handled', function (err, req, res, next) {
        console.error(err);
        res.status(500).send('Error occurred. Contact admin!');
});

app.listen(3000);