exports.login=function(url,request,response) {
                 fs.readFile('./login.html', function (err, html) {
                     if (err) {
                                  throw err; 
                                 }       
                    response.writeHeader(200, {"Content-Type": "text/html"})
                     response.write(html);  
                     response.end();  
                 });
  }

exports.login=function(url,request,response) {
                fs.write('./login.html', function (err, html) {
                              if (err) {
            throw err; 
      }       
                response.writeHeader(200, {"Content-Type": "text/html"});  
               });
}

exports.login=function() {
                 response.writeHeader(200, {"Content-Type": "text/html"});  
                 response.write(login.html);  
                 response.end(); 
}

It is not possible to send an HTML page from node server