sample

gistfile1.js

#!/usr/local/bin/node

//Writing a configuration file
var config = {
   "secrets" : {
      "clientId" : "GOZ5E3WU0KPGHAU4NDRBDNT2F2BVAP0SGCMZJAQAI4EOOGMT",
      "clientSecret": "HLZJO1OEXMPKXVDO23Z4EE3WBHS2ZSBUBU4UWALW2ZSFEFNR",
      "redirectUrl": "https://localhost:3000/callback"
   }
   ,"foursquare" : {
      "version" : "20121223"
   }
}
//Calling the node's foursquare api

var foursquare = require("node-foursquare")(config);
//Creating the server on local machine
var express = require('express');
var app = express();
app.listen(3000);
//Login into the API
app.get('/login', function(request, response) {
      request.writeHead(303, {"location": foursquare.getAuthClientRedirectUrl() });
      request.end();
   });

app.get('/callback', function(request, response) {
      foursquare.getAccessToken({
        code: request.query.code
        }, function(error, accessToken) {
          if (error) {
            response.send("An error occured: " + error.message)
          }
           else {
             console.log(accessToken)
          }
       });
   });

Error Message:
TypeError: Object #<IncomingMessage> has no method 'writeHead'
    at /Users/harI/app.js:23:15
    at callbacks (/Users/harI/node_modules/express/lib/router/index.js:160:37)
    at param (/Users/harI/node_modules/express/lib/router/index.js:134:11)
    at pass (/Users/harI/node_modules/express/lib/router/index.js:141:5)
    at Router._dispatch (/Users/harI/node_modules/express/lib/router/index.js:169:5)
    at Object.router (/Users/harI/node_modules/express/lib/router/index.js:32:10)
    at next (/Users/harI/node_modules/express/node_modules/connect/lib/proto.js:190:15)
    at Object.expressInit [as handle] (/Users/harI/node_modules/express/lib/middleware.js:31:5)
    at next (/Users/harI/node_modules/express/node_modules/connect/lib/proto.js:190:15)
    at Object.query [as handle] (/Users/harI/node_modules/express/node_modules/connect/lib/middleware/query.js:44:5)