var memcache = require('memcache')     , http = require('http')     , url = require('url')     , qs = require('querystring')     , memsettings = { port: 2000, host: '10.6.0.6' }     , httpsettings = { port: 3000 }     , cacheObject = {}     , httpserver     , client     , requestHandler; client = new memcache.Client(memsettings.port, memsettings.host); //... client.on('connect', function(){     client.connected = true; }); client.on('close', function(){     // no arguments - connection has been closed     client.connected = false; }); function getData(key, wrapper, res){     client.get(key, function(error, result){             // all of the callbacks have two arguments.             // 'result' may contain things which aren't great, but             // aren't really errors, like 'NOT_STORED'             if(!error){                 if(result){                     cacheObject[key] = result;                     res.write( wrapper + '(' + result + ')');                 } else {                     res.write('no data');                 }                 res.end();             }      });     /*if(cacheObject[key]){         response.write(cacheObject[key]);         response.end();     } else  {         client.get(key, function(error, result){             // all of the callbacks have two arguments.             // 'result' may contain things which aren't great, but             // aren't really errors, like 'NOT_STORED'             if(!error){                 cacheObject[key] = result;                 cacheObject[key]['timeoutId'] = setTimeout(function(){                     client.get(key, function(error, result){                         if(!error){                             cacheObject[key] = result;                         }                     });                 });                 response.write(result);                 response.end();             }         });     }*/ } httpserver = http.createServer(function(req, res){     var urlObj, queryObj;     urlObj = url.parse(req.url);     res.writeHead(200, {"Content-Type":"text/javascript; charset=utf-8"});     queryObj = qs.parse(urlObj.query);     path = queryObj.pathname;     if(queryObj.gid){         getData(queryObj.gid, queryObj.callback||'callback', res);     } else {         res.write('no input');         res.end();     }     /*     switch(urlObj.pathname){         case '/pai':             res.write(urlObj.pathname);         break;         case '/qiang':             res.write(urlObj.pathname);         break;         default:             res.write('default');         break;     }     res.end();     */ }); client.connect(); httpserver.listen(httpsettings.port); console.log('http server listening on ' + httpsettings.port);