Twitter OAuth with node-oauth for node.js + express 4

app.js

/* 
    Node.js, express, oauth example using Twitters API
    
    Install Dependencies:
        npm install express
        npm install oauth
    
    Create App File:
        Save this file to app.js
    
    Start Server:
        node app.js
    
    Navigate to the page:
        Local host: http://127.0.0.1:8080
        Remote host: http://yourserver.com:8080
    
*/

var express = require('express');
var bodyParser = require('body-parser');
var logger = require('express-logger');
var cookieParser = require('cookie-parser');
var session = require('express-session');
var inspect = require('util-inspect');
var oauth = require('oauth');

var app = express();

// Get your credentials here: https://dev.twitter.com/apps
var _twitterConsumerKey = "twitterConsumerKey";
var _twitterConsumerSecret = "twitterConsumerSecret";

var consumer = new oauth.OAuth(
    "https://twitter.com/oauth/request_token", "https://twitter.com/oauth/access_token", 
    _twitterConsumerKey, _twitterConsumerSecret, "1.0A", "http://127.0.0.1:8080/sessions/callback", "HMAC-SHA1");

app.use(bodyParser.urlencoded({ extended: true }));
app.use(bodyParser.json());
app.use(logger({ path: "log/express.log"}));
app.use(cookieParser());
app.use(session({ secret: "very secret", resave: false, saveUninitialized: true}));

app.use(function(req, res, next) {
  res.locals.session = req.session;
  next();
});

app.get('/sessions/connect', function(req, res){
  consumer.getOAuthRequestToken(function(error, oauthToken, oauthTokenSecret, results){
    if (error) {
      res.send("Error getting OAuth request token : " + inspect(error), 500);
    } else {  
      req.session.oauthRequestToken = oauthToken;
      req.session.oauthRequestTokenSecret = oauthTokenSecret;
      console.log("Double check on 2nd step");
      console.log("------------------------");
      console.log("<<"+req.session.oauthRequestToken);
      console.log("<<"+req.session.oauthRequestTokenSecret);
      res.redirect("https://twitter.com/oauth/authorize?oauth_token="+req.session.oauthRequestToken);      
    }
  });
});

app.get('/sessions/callback', function(req, res){
  console.log("------------------------");
  console.log(">>"+req.session.oauthRequestToken);
  console.log(">>"+req.session.oauthRequestTokenSecret);
  console.log(">>"+req.query.oauth_verifier);
  consumer.getOAuthAccessToken(req.session.oauthRequestToken, req.session.oauthRequestTokenSecret, req.query.oauth_verifier, function(error, oauthAccessToken, oauthAccessTokenSecret, results) {
    if (error) {
      res.send("Error getting OAuth access token : " + inspect(error) + "[" + oauthAccessToken + "]" + "[" + oauthAccessTokenSecret + "]" + "[" + inspect(result) + "]", 500);
    } else {
      req.session.oauthAccessToken = oauthAccessToken;
      req.session.oauthAccessTokenSecret = oauthAccessTokenSecret;
      
      res.redirect('/home');
    }
  });
});

app.get('/home', function(req, res){
    consumer.get("https://api.twitter.com/1.1/account/verify_credentials.json", req.session.oauthAccessToken, req.session.oauthAccessTokenSecret, function (error, data, response) {
      if (error) {
        //console.log(error)
        res.redirect('/sessions/connect');
      } else {
        var parsedData = JSON.parse(data);
        res.send('You are signed in: ' + inspect(parsedData.screen_name));
      } 
    });
});

app.get('*', function(req, res){
    res.redirect('/home');
});

app.listen(8080, function() {
  console.log('App runining on port 8080!');
});

package.json

{
  "name": "twitter-oauth",
  "version": "1.0.0",
  "description": "",
  "main": "app.js",
  "dependencies": {
    "body-parser": "^1.15.2",
    "cookie-parser": "^1.4.3",
    "express": "^4.14.0",
    "express-logger": "0.0.3",
    "express-session": "^1.14.1",
    "oauth": "^0.9.14",
    "util-inspect": "^0.1.8"
  },
  "devDependencies": {},
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "Juan Gonzalez <[email protected]>",
  "license": "ISC"
}

Based on original gist here https://gist.github.com/joshj/1933640

Thank you! 👍

Cheers, man! 👍

Line 59 should be res not result but I was able to get this up on glitch without much trouble, thanks!

Thx man works like a charm!

Really cool.
Thanks guy.

👍 excellent, thank you.

Small thing but trolled me:

res.send("Error getting OAuth access token : " + inspect(error) + "[" + oauthAccessToken + "]" + "[" + oauthAccessTokenSecret + "]" + "[" + inspect(result) + "]", 500);

should be inspect(results)

Thanks a lot for the Gist!

The code works fine at one point but when I run it again, I get either of these two errors
Error getting OAuth access token : { statusCode: 401, data: 'Request token missing' }[undefined][undefined][undefined]
Error getting OAuth access token : { statusCode: 401, data: 'Error processing your OAuth request: Invalid oauth_verifier parameter' }[undefined][undefined][undefined]

What is going wrong?