CouchDB proxy middleware

couchdb_proxy_middleware

/*******************************************
 * Connect middleware to proxy request to
 * the specified path on CouchDB.
 *
 * Usage:
 *
 *   app.use(express.bodyDecoder());
 *   app.use(function(req, res, next){
 *      res.bindings = res.bindings || {};
 *   });
 *
 *   app.get('/news', couchdb.proxiedTo("/_design/posts/_view/by_tag", {
 *      startkey: ["news", "\u0000"],
 *      endkey: ["news"],
 *      descending: true,
 *      limit: 10
 *   }), function(req, res){
 *      res.writeHead(200);
 *      res.end(JSON.stringify(res.bindings))
 *   });
 *
 *******************************************/
var url = require('url'),
    querystring = require('querystring');
var $ = require('jquery');
var db = require('config').couchdb;

exports.proxiedTo = function(path, params){
   return function(req, res, next){
      var urlObj = url.parse(req.url, true);
      var query = $.extend({}, urlObj.query, params);
      var request = {
         method: req.method,
         path: path
      };
      if( req.method == "POST" || req.method == "PUT" ){
         request.data = req.body;
      }
      db.request(request,
                 function(err, doc){
                    res.bindings['couchdb.proxiedTo.err'] = err;
                    res.bindings['couchdb.proxiedTo.doc'] = doc;
                    next();
                 });;
   };
}