Dynamic proxy targets with Argo

server.js

var argo = require('argo');
var router = require('argo-url-router');

argo()
  .use(router)
  .route('/molds/{splat: .*}', function (handle) {
    handle('request', function (env, next) {
      var targets = {
        'google': 'http://google.com',
        'yahoo': 'http://yahoo.com'
      };
      
      var splitUrl = env.request.url.split('/');
      var fragment = splitUrl[2];

      if (targets[fragment]) {
        env.target.url = targets[fragment] + '/' + splitUrl.slice(3).join('/');
      } else {
        env.response.statusCode = 404;
      }

      next(env)
    });

    handle('response', function (env, next) {
      env.response.setHeader('Content-Type', 'application/json')
      next(env)
    });
  })
  .listen(process.env.PORT || 3000);