static_server.js

var http = require("http"),
    url = require("url"),
    path = require("path"),
    fs = require("fs")
    port = process.argv[2] || 8888;

http.createServer(function(request, response) {

  var uri = url.parse(request.url).pathname
    , filename = path.join(process.cwd(), uri);
  
  path.exists(filename, function(exists) {
    if(!exists) {
      console.log('404',filename);
      response.writeHead(404, {"Content-Type": "text/plain"});
      response.write("404 Not Found\n");
      response.end();
      return;
    }

	if (fs.statSync(filename).isDirectory()) filename += '/index.html';

    fs.readFile(filename, "binary", function(err, file) {
      if(err) {        
        response.writeHead(500, {"Content-Type": "text/plain", "Cache-Control": "no-store"});
        response.write(err + "\n");
        response.end();
        return;
      }

      if( request.url.search('.json') >= 0 ){
        response.writeHead(200, {"Content-Type": "application/json", "Cache-Control": "no-store"});
        response.write( file , "binary");
        response.end();
      }else{
        response.writeHead(200);
        response.write( file.replace(/{:expireCache}/g,'?_='+Math.random()) , "binary");
        response.end();
      }

    });
  });
}).listen(parseInt(port, 10));

console.log("Static file server running at\n  => http://localhost:" + port + "/\nCTRL + C to shutdown");