proxy.js

exports.proxy = function (config) {
  // where to send requests                                                                                        
  var target = {
    port: config.couch.port,
    host: config.couch.host
  };

  // create a http proxy to CouchDB                                                                                
  http_proxy.setMaxSockets(1024);
  var proxy = new http_proxy.HttpProxy({
    target: target,
    changeOrigin: true,
    timeout: 60000
  });

  return function (url, req, res) {
    // rewrite request url                                                                                         
    req.url = url;
    // proxy request to CouchDB                                                                                    
    proxy.proxyRequest(req, res);
  };
};