A small twitter proxy server (written in node) for all the developers who want to keep their Twitter applications running and let node do the heavy OAuth lifting for you.

twitterProxy.js

#!/usr/bin/env node

// Before running install
//              -- npm install -g optimist oauth step colors express

var serverPort = 8008;

var argv = require('optimist')
  .usage('Usage: --key=[consumer key] -secret=[consumer secret]')
  .demand(['key', 'secret'])
  .argv
;
 
var OAuth = require('oauth').OAuth;
var Step = require('step');
var colors = require('colors');

var express = require("express");
var app = express();

var access_token = "";
var access_token_secret = ""
 
var REQUEST_TOKEN_URL = 'http://api.twitter.com/oauth/request_token';
var ACCESS_TOKEN_URL = 'http://api.twitter.com/oauth/access_token';
var OAUTH_VERSION = '1.0';
var HASH_VERSION = 'HMAC-SHA1';
 
 
function getAccessToken(oa, oauth_token, oauth_token_secret, pin) {
  oa.getOAuthAccessToken(oauth_token, oauth_token_secret, pin,
    function(error, oauth_access_token, oauth_access_token_secret, results2) {
      if (error) {
        if (parseInt(error.statusCode) == 401) {
          throw new Error('The pin number you have entered is incorrect'.bold.red);
        }
      }
      console.log('Your OAuth Access Token: '.green + (oauth_access_token).bold.cyan);
      console.log('Your OAuth Token Secret: '.green + (oauth_access_token_secret).bold.cyan);
      
      access_token_secret = oauth_access_token_secret;
      access_token = oauth_access_token

      //Starting Redirect Server
      startServer(serverPort);

     });
}
 
function getRequestToken(oa) {
  
  oa.getOAuthRequestToken(function(error, oauth_token, oauth_token_secret, results){
    if(error) {
      throw new Error(([error.statusCode, error.data].join(': ')).bold.red);
    } else { 
      console.log('In your browser, log in to your twitter account.  Then visit:'.bold.green)
      console.log(('https://twitter.com/oauth/authorize?oauth_token=' + oauth_token).underline.green)
      console.log('After logged in, you will be promoted with a pin number'.bold.green)
      console.log('Enter the pin number here:'.bold.yellow);
      var stdin = process.openStdin();
      stdin.on('data', function(chunk) {
        pin = chunk.toString().trim();
        if(pin != ""){
         	getAccessToken(oa, oauth_token, oauth_token_secret, pin);
       	}
      });
    }
  });
}

var getLatestTweets = function (tweeter, count, callback) {
    	oa.get("https://api.twitter.com/1.1/statuses/user_timeline.json?screen_name=" + tweeter + "&count=" + count, access_token, access_token_secret, function (error, data) {
	        var result;
	        if(error){
	            result = {error: error};
	        }else{
	            result = data;
	        }

	        callback(result);
    	});
	};

var getLists = function (listname, owner, count, callback) {
		oa.get("https://api.twitter.com/1.1/lists/statuses.json?slug=" + listname + "&owner_screen_name=" + owner + "&count="+count+"&page=1&include_entities=false&include_rts=true", access_token, access_token_secret, function (error, data) {
	        var result;
	        if(error){
	            result = {error: error};
	        }else{
	            result = data;
	        }
	        callback(result);
    	});
};


var getTrends = function (woid, exclude, callback) {
    	oa.get("https://api.twitter.com/1.1/trends/place.json?id=" + woid + "&exclude=" + exclude, access_token, access_token_secret, function (error, data) {
	        var result;
	        if(error){
	            result = {error: error};
	        }else{
	            result = data;
	        }
	        callback(result);
    	});
};

function startServer(port){
	var app = express();
	app.use(express.bodyParser());
	
	app.get('/latest', function(req, res){
   		res.writeHead(200, {'Content-Type': 'application/json'});
   		getLatestTweets(req.query.screen_name, req.query.count,function(data){
   			try{
   				res.write(data);
   				//console.log(req.query);
   				res.end();
   			}catch(err){
   				if(data != undefined){
   					if(data != ""){
   						res.write(JSON.stringify(data));
   					}else{
   						res.write('{"error": "server error"}');
   					}
   				}else{
   					res.write('{"error": "server error"}');
   				}
   				
   				res.end();
   			}
   		});
   	});

	app.get('/lists', function(req, res){
   		res.writeHead(200, {'Content-Type': 'application/json'});
   		getLists(req.query.slug, req.query.owner_screen_name, req.query.count,function(data){
   			try{
   				res.write(data);
   				//console.log(req.query);
   				res.end();
   			}catch(err){
   				if(data != undefined){
   					if(data != ""){
   						res.write(JSON.stringify(data));
   					}else{
   						res.write('{"error": "server error"}');
   					}
   				}else{
   					res.write('{"error": "server error"}');
   				}
   				
   				res.end();
   			}
   		});
   	});

   	app.get('/trends', function(req, res){
   		res.writeHead(200, {'Content-Type': 'application/json'});
   		getTrends(req.query.id, req.query.exclude,function(data){
   			try{
   				res.write(data);
   				//console.log(req.query);
   				res.end();
   			}catch(err){
   				if(data != undefined){
   					if(data != ""){
   						res.write(JSON.stringify(data));
   					}else{
   						res.write('{"error": "server error"}');
   					}
   				}else{
   					res.write('{"error": "server error"}');
   				}
   				
   				res.end();
   			}
   		});
   	});

   	

	app.listen(port);
	console.log();
	console.log(("Server started on port: " + port).bold.yellow);
}

var key = argv.key.trim();
var secret = argv.secret.trim();

var user_auth_token = argv.usertoken;
var user_auth_secret = argv.usersecret;

if(user_auth_token != undefined && user_auth_secret != undefined){
	if(user_auth_token != "" && user_auth_secret != ""){
		access_token_secret = user_auth_secret;
      	access_token = user_auth_token
		startServer(serverPort);
	}else{
		var oa = new OAuth(REQUEST_TOKEN_URL, ACCESS_TOKEN_URL, key, secret, OAUTH_VERSION , null, HASH_VERSION); 
		getRequestToken(oa);
	}
}else{
	var oa = new OAuth(REQUEST_TOKEN_URL, ACCESS_TOKEN_URL, key, secret, OAUTH_VERSION , null, HASH_VERSION); 
	getRequestToken(oa);
}