node.js - express.basicAuth throwing error

Question

I just created the basic authentication in nodejs using express basic auth

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

// Authenticator
app.use(express.basicAuth('testuser','testpassword'));

app.get('/home', function(req, res) {
 res.send('Hello World');
});

app.listen(process.env.PORT || 8080);

I got the following error. I dont know where i went wrong.

app.use(express.basicAuth('testuser','testpassword'));
                ^
TypeError: Object function createApplication() {
  var app = function(req, res, next) {
    app.handle(req, res, next);
  };

  mixin(app, proto);
  mixin(app, EventEmitter.prototype);

  app.request = { __proto__: req, app: app };
  app.response = { __proto__: res, app: app };
  app.init();
  return app;
} has no method 'basicAuth'
    at Object.<anonymous> (E:
ode_modules
pmloginapp.js:5:17)
    at Module._compile (module.js:456:26)
    at Object.Module._extensions..js (module.js:474:10)
    at Module.load (module.js:356:32)
    at Function.Module._load (module.js:312:12)
    at Function.Module.runMain (module.js:497:10)
    at startup (node.js:119:16)
    at node.js:902:3

I'm very new to nodejs stuff. Any help would be seriously appreciated

Answer 1

As mentioned in the comments, Express 4 doesn't ship with middleware any longer, you can either copy the implementation directly from the express repo or use a solution similar to this:

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

// Authenticator
app.use(function(req, res, next) {
    var auth;

    // check whether an autorization header was send    
    if (req.headers.authorization) {
      // only accepting basic auth, so:
      // * cut the starting "Basic " from the header
      // * decode the base64 encoded username:password
      // * split the string at the colon
      // -> should result in an array
      auth = new Buffer(req.headers.authorization.substring(6), 'base64').toString().split(':');
      // use Buffer.from in with node v5.10.0+ 
      // auth = Buffer.from(req.headers.authorization.substring(6), 'base64').toString().split(':');
    }

    // checks if:
    // * auth array exists 
    // * first value matches the expected user 
    // * second value the expected password
    if (!auth || auth[0] !== 'testuser' || auth[1] !== 'testpassword') {
        // any of the tests failed
        // send an Basic Auth request (HTTP Code: 401 Unauthorized)
        res.statusCode = 401;
        // MyRealmName can be changed to anything, will be prompted to the user
        res.setHeader('WWW-Authenticate', 'Basic realm="MyRealmName"');
        // this will displayed in the browser when authorization is cancelled
        res.end('Unauthorized');
    } else {
        // continue with processing, user was authenticated
        next();
    }
});

app.get('/home', function(req, res) {
 res.send('Hello World');
});

app.listen(process.env.PORT || 8080);