express-respondto

express-respondto is an NPM module for Express to add basic functionality similar to the respond_to method in Ruby on Rails. The module is used as a middleware that is added to your application to enable the checking for whether or not an extension is passed as part of a path. If no extension is found in the path, it will default to the format html.

Using the middleware

The middleware is required like any other module used in your app. For obvious reasons, it requires Express. Once included, pass it into the app. The middleware will automatically parse the URL and set the format parameter of the req object.

express = require('express'),
  app = express(),
  respondTo = require('express-respondto');

app.use(respondTo.determineExtension);

// Default HTML would render the html template
app.get('/default', function(req, res, next) {
  switch(req.format) {
    case 'json':
      res.json({ default: 'data' });
    case 'html':
    default:
      res.render('default');
  }
});

// Would render the JSON object
app.get('/default.json', function(req, res, next) {
  switch(req.format) {
    case 'json':
      res.json({ default: 'data' });
    case 'html':
    default:
      res.render('default');
  }
});

Changelog

• 0.1.0 - Initial functionality