connect middleware that wraps serves common-js modules wrapped with AMD define()

define-wrapper.js

var fs = require('fs');
var path = require('path');
var url = require('url');

module.exports = function(directory, blacklist) {
  if( directory === undefined ) {
    throw new Error('You need to pass a location to work with');
  }

  blacklist = blacklist || [];

  return function(req, res, next) {
    var filename = url.parse(req.url).path;
    if( blacklist.indexOf(filename) > -1 ){
      return next();
    }

    filename = path.join(directory, filename);

    res.setHeader('conent-type', 'application/javascript');
    res.write('define(function(require, exports, module){\n\n');

    fs.createReadStream(filename)
      .on('data', res.write.bind(res))
      .on('end', function() {
        res.write('\n});');
        res.end();
      })
      .on('error', function(err) {
        console.error(err);
        console.trace();
        next();
      });
  };
};