request with caching

request_with_caching.js

   request: function(options, cb) {
        var cache;
        if (options.cache) cache = './data/cache/' + options.cache;
        var http_req = function() {

            req(options, function(error, response, body){
                if (!error && options.cache) {
                    if (response.headers['content-encoding'].search('gzip') != -1) {
                        // UHOH
                     }

                    console.log(body)
                    fs.writeFile(cache, body); 
                };
                cb(error, response, body); 
            });
        };
        if (!cache) return http_req();
        fs.stat(cache, function(err, stats){
            console.log(stats)
            if (!err && stats.mtime.between(Date.now().addWeeks(-1), Date.now())) {
                fs.readFile(cache, function (err, data) {
                    if (err) http_req()
                    else {
                        var result = JSON.parse(data);
                        cb(undefined,result[0], result[1]);
                    }
                });
            } else {
                return http_req();
            }
        }); 
      }
  })