Async JSGI

gistfile1.js

var Response = require('ringo/webapp/response').Response
  , Request = require('ringo/webapp/request').Request
  , defer = require('ringo/promise').defer
  , jsdeps = require('../jsdeps/index')
  , setTimeout = require('ringo/scheduler').setTimeout;

exports.packages = function(req) {
  var response = defer()
    , params
    , prereqs
    , excl
    , tree;

  Request(req);
  params = req.params;
  prereqs = JSON.parse(params.prereqs  || '[]');
  excl = JSON.parse(params.x || '[]');

  tree = new jsdeps.DependencyTree(prereqs, excl);
  tree.parse(function (res) {
    response.resolve({
      status: 200
    , headers: {
        'Content-Type': 'application/javascript'
      }
    , body: [res.code]
    });

  });
  return response.promise;
};