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node.js auth package (password, facebook, & more) for Connect and Express apps

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README.md

everyauth

Authentication and authorization (password, facebook, & more) for your node.js Connect and Express apps.

So far, everyauth enables you to login via:

  • password
  • facebook
  • twitter
  • github
  • instagram
  • foursquare
  • linkedin

everyauth is:

  • Modular - We have you covered with Facebook and Twitter OAuth logins, basic login/password support, and modules coming soon for beta invitation support and more.
  • Easily Configurable - everyauth was built with powerful configuration needs in mind. Configure an authorization strategy in a straightforward, easy-to-read & easy-to-write approach, with as much granularity as you want over the steps and logic of your authorization strategy.
  • Idiomatic - The syntax for configuring and extending your authorization strategies are idiomatic and chainable.

Installation

$ npm install everyauth

Quick Start

Using everyauth comes down to just 2 simple steps if using Connect or 3 simple steps if using Express:

  1. Choose and Configure Auth Strategies - Find the authentication strategy you desire in one of the sections below. Follow the configuration instructions.
  2. Add the Middleware to Connect

    var everyauth = require('everyauth');
    // Step 1 code goes here
    
    // Step 2 code
    var connect = require('connect');
    var app = connect(
        connect.bodyParser()
      , connect.cookieParser()
      , connect.session({secret: 'mr ripley'})
      , everyauth.middleware()
      , connect.router(routes)
    );
    
  3. Add View Helpers to Express

    // Step 1 code
    // ...
    // Step 2 code
    // ...
    
    // Step 3 code
    everyauth.helpExpress(app);
    
    app.listen(3000);
    

    For more about what view helpers everyauth adds to your app, see the section titled "Express Helpers" near the bottom of this README.

Example Application

There is an example application at ./example

To run it:

$ cd example
$ node server.js

Some OAuth Providers do not allow callbacks to localhost, so you will need to create a localhost alias called local.host. Make sure you set up your /etc/hosts so that 127.0.0.1 is also associated with 'local.host'. So inside your /etc/hosts file, one of the lines will look like:

127.0.0.1   localhost local.host

Then point your browser to http://local.host:3000

Logging Out

If you integrate everyauth with connect, then everyauth automatically sets up a logoutPath at GET /logout for your app. It also sets a default handler for your logout route that clears your session of auth information and redirects them to '/'.

To over-write the logout path:

everyauth.everymodule.logoutPath('/bye');

To over-write the logout redirect path:

everyauth.everymodule.logoutRedirectPath('/navigate/to/after/logout');

To over-write the logout handler:

everyauth.everymodule.handleLogout( function (req, res) {
  // Put you extra logic here

  req.logout(); // The logout method is added for you by everyauth, too

  // And/or put your extra logic here

  res.writeHead(303, { 'Location': this.logoutRedirectPath() });
  res.end();
});

Setting up Facebook Connect

var everyauth = require('everyauth')
  , connect = require('connect');

everyauth.facebook
  .myHostname('http://localhost:3000')
  .appId('YOUR APP ID HERE')
  .appSecret('YOUR APP SECRET HERE')
  .handleAuthCallbackError( function (req, res) {
    // If a user denies your app, Facebook will redirect the user to
    // /auth/facebook/callback?error_reason=user_denied&error=access_denied&error_description=The+user+denied+your+request.
    // This configurable route handler defines how you want to respond to
    // that.
    // If you do not configure this, everyauth renders a default fallback
    // view notifying the user that their authentication failed and why.
  })
  .findOrCreateUser( function (session, accessToken, fbUserMetadata) {
    // find or create user logic goes here
  })
  .redirectPath('/');

var routes = function (app) {
  // Define your routes here
};

connect(
    connect.bodyParser()
  , connect.cookieParser()
  , connect.session({secret: 'whodunnit'})
  , everyauth.middleware()
  , connect.router(routes);
).listen(3000);

You can also configure more parameters (most are set to defaults) via the same chainable API:

everyauth.facebook
  .entryPath('/auth/facebook')
  .callbackPath('/auth/facebook/callback')
  .scope('email')                // Defaults to undefined

If you want to see what the current value of a configured parameter is, you can do so via:

everyauth.facebook.scope(); // undefined
everyauth.facebook.entryPath(); // '/auth/facebook'

To see all parameters that are configurable, the following will return an object whose parameter name keys map to description values:

everyauth.facebook.configurable();

Dynamic Facebook Connect Scope

Facebook provides many different permissions for which your app can ask your user. This is bundled up in the scope query paremter sent with the oauth request to Facebook. While your app may require several different permissions from Facebook, Facebook recommends that you only ask for these permissions incrementally, as you need them. For example, you might want to only ask for the "email" scope upon registration. At the same time, for another user, you may want to ask for "user_status" permissions because they have progressed further along in your application.

everyauth enables you to specify the "scope" dynamically with a second variation of the configurable scope. In addition to the first variation that looks like:

everyauth.facebook
  .scope('email,user_status');

you can have greater dynamic control over "scope" via the second variation of scope:

everyauth.facebook
  .scope( function (req, res) {
    var session = req.session;
    switch (session.userPhase) {
      case 'registration':
        return 'email';
      case 'share-media':
        return 'email,user_status';
    }
  });

Setting up Twitter OAuth

var everyauth = require('everyauth')
  , connect = require('connect');

everyauth.twitter
  .myHostname('http://localhost:3000')
  .consumerKey('YOUR CONSUMER ID HERE')
  .consumerSecret('YOUR CONSUMER SECRET HERE')
  .findOrCreateUser( function (session, accessToken, accessTokenSecret, twitterUserMetadata) {
    // find or create user logic goes here
  })
  .redirectPath('/');

var routes = function (app) {
  // Define your routes here
};

connect(
    connect.bodyParser()
  , connect.cookieParser()
  , connect.session({secret: 'whodunnit'})
  , everyauth.middleware()
  , connect.router(routes);
).listen(3000);

Setting up Password Authentication

var everyauth = require('everyauth')
  , connect = require('connect');

everyauth.password
  .getLoginPath('/login') // Page with the login form
  .postLoginPath('/login') // What you POST to
  .loginView('a string of html; OR the name of the jade/etc-view-engine view')
  .authenticate( function (login, password) {
    // Returns a user if we can authenticate with the login + password.
    // If we cannot, returns null/undefined
  })

  .getRegisterPath('/register')
  .postRegisterPath('/register')
  .registerView('a string of html; OR the name of the jade/etc-view-engine view')
  .registerUser( function (login, password) {
    // Returns a user (or a Promise that promises a user) after adding it to
    // some user store. You can also do things here like registration validation
    // and re-directing back to the registration page upon invalid registration
  })


  .redirectPath('/'); // Where to redirect to after a login

var routes = function (app) {
  // Define your routes here
};

connect(
    connect.bodyParser()
  , connect.cookieParser()
  , connect.session({secret: 'whodunnit'})
  , everyauth.middleware()
  , connect.router(routes);
).listen(3000);

Setting up GitHub OAuth

var everyauth = require('everyauth')
  , connect = require('connect');

everyauth.github
  .myHostname('http://localhost:3000')
  .appId('YOUR CLIENT ID HERE')
  .appSecret('YOUR CLIENT SECRET HERE')
  .findOrCreateUser( function (session, accessToken, githubUserMetadata) {
    // find or create user logic goes here
  })
  .redirectPath('/');

var routes = function (app) {
  // Define your routes here
};

connect(
    connect.bodyParser()
  , connect.cookieParser()
  , connect.session({secret: 'whodunnit'})
  , everyauth.middleware()
  , connect.router(routes);
).listen(3000);

You can also configure more parameters (most are set to defaults) via the same chainable API:

everyauth.github
  .entryPath('/auth/github')
  .callbackPath('/auth/github/callback')
  .scope('repo'); // Defaults to undefined
                  // Can be set to a combination of: 'user', 'public_repo', 'repo', 'gist'
                  // For more details, see http://develop.github.com/p/oauth.html

If you want to see what the current value of a configured parameter is, you can do so via:

everyauth.github.scope(); // undefined
everyauth.github.entryPath(); // '/auth/github'

To see all parameters that are configurable, the following will return an object whose parameter name keys map to description values:

everyauth.github.configurable();

Setting up Instagram OAuth

var everyauth = require('everyauth')
  , connect = require('connect');

everyauth.instagram
  .myHostname('http://localhost:3000')
  .appId('YOUR CLIENT ID HERE')
  .appSecret('YOUR CLIENT SECRET HERE')
  .findOrCreateUser( function (session, accessToken, instagramUserMetadata) {
    // find or create user logic goes here
  })
  .redirectPath('/');

var routes = function (app) {
  // Define your routes here
};

connect(
    connect.bodyParser()
  , connect.cookieParser()
  , connect.session({secret: 'whodunnit'})
  , everyauth.middleware()
  , connect.router(routes);
).listen(3000);

You can also configure more parameters (most are set to defaults) via the same chainable API:

everyauth.instagram
  .entryPath('/auth/instagram')
  .callbackPath('/auth/instagram/callback')
  .scope('basic') // Defaults to 'basic'
                  // Can be set to a combination of: 'basic', 'comments', 'relationships', 'likes'
                  // For more details, see http://instagram.com/developer/auth/#scope
  .display(undefined); // Defaults to undefined; Set to 'touch' to see a mobile optimized version
                       // of the instagram auth page

If you want to see what the current value of a configured parameter is, you can do so via:

everyauth.instagram.callbackPath(); // '/auth/instagram/callback'
everyauth.instagram.entryPath(); // '/auth/instagram'

To see all parameters that are configurable, the following will return an object whose parameter name keys map to description values:

everyauth.instagram.configurable();

Setting up Foursquare OAuth

var everyauth = require('everyauth')
  , connect = require('connect');

everyauth.foursquare
  .myHostname('http://localhost:3000')
  .appId('YOUR CLIENT ID HERE')
  .appSecret('YOUR CLIENT SECRET HERE')
  .findOrCreateUser( function (session, accessToken, foursquareUserMetadata) {
    // find or create user logic goes here
  })
  .redirectPath('/');

var routes = function (app) {
  // Define your routes here
};

connect(
    connect.bodyParser()
  , connect.cookieParser()
  , connect.session({secret: 'whodunnit'})
  , everyauth.middleware()
  , connect.router(routes);
).listen(3000);

You can also configure more parameters (most are set to defaults) via the same chainable API:

everyauth.foursquare
  .entryPath('/auth/foursquare')
  .callbackPath('/auth/foursquare/callback');

If you want to see what the current value of a configured parameter is, you can do so via:

everyauth.foursquare.callbackPath(); // '/auth/foursquare/callback'
everyauth.foursquare.entryPath(); // '/auth/foursquare'

To see all parameters that are configurable, the following will return an object whose parameter name keys map to description values:

everyauth.foursquare.configurable();

Setting up LinkedIn OAuth

var everyauth = require('everyauth')
  , connect = require('connect');

everyauth.linkedin
  .myHostname('http://localhost:3000')
  .consumerKey('YOUR CONSUMER ID HERE')
  .consumerSecret('YOUR CONSUMER SECRET HERE')
  .findOrCreateUser( function (session, accessToken, accessTokenSecret, linkedinUserMetadata) {
    // find or create user logic goes here
  })
  .redirectPath('/');

var routes = function (app) {
  // Define your routes here
};

connect(
    connect.bodyParser()
  , connect.cookieParser()
  , connect.session({secret: 'whodunnit'})
  , everyauth.middleware()
  , connect.router(routes);
).listen(3000);

You can also configure more parameters (most are set to defaults) via the same chainable API:

everyauth.linkedin
  .entryPath('/auth/linkedin')
  .callbackPath('/auth/linkedin/callback');

If you want to see what the current value of a configured parameter is, you can do so via:

everyauth.linkedin.callbackPath(); // '/auth/linkedin/callback'
everyauth.linkedin.entryPath(); // '/auth/linkedin'

To see all parameters that are configurable, the following will return an object whose parameter name keys map to description values:

everyauth.linkedin.configurable();

Accessing the User

If you are using express or connect, then everyauth provides an easy way to access the user as:

  • req.user from your app server
  • everyauth.user via the everyauth helper accessible from your express views.
  • user as a helper accessible from your express views

To access the user, configure everyauth.everymodule.findUserById. For example, using mongoose:

everyauth.everymodule.findUserById( function (userId, callback) {
  User.findById(userId, callback);
  // callback has the signature, function (err, user) {...}
});

Once you have configured this method, you now have access to the user object that was fetched anywhere in your server app code as req.user. For instance:

var app = require('express').createServer()

// Configure your app

app.get('/', function (req, res) {
  console.log(req.user);  // FTW!
  res.render('home');
});

Moreover, you can access the user in your views as everyauth.user.

//- Inside ./views/home.jade
span.user-id= everyauth.user.name
#user-id= user.id

Express Helpers

If you are using express, everyauth comes with some useful dynamic helpers. To enable them:

var express = require('express')
  , everyauth = require('everyauth')
  , app = express.createServer();

everyauth.helpExpress(app);

Then, from within your views, you will have access to the following helpers methods attached to the helper, everyauth:

  • everyauth.loggedIn
  • (more - we copy over req.session.auth keys/values to the everyauth helper)

Configuring a Module

everyauth was built with powerful configuration needs in mind.

Every module comes with a set of parameters that you can configure directly. To see a list of those parameters on a per module basis, with descriptions about what they do, enter the following into the node REPL (to access the REPL, just type node at the command line)

> var ea = require('everyauth');
> ea.facebook.configurable();

For example, you will see that one of the configuration parameters is moduleTimeout, which is described to be how long to wait per step before timing out and invoking any timeout callbacks

Every configuration parameter corresponds to a method of the same name on the auth module under consideration (i.e., in this case ea.facebook). To create or over-write that parameter, just call that method with the new value as the argument:

ea.facebook
  .moduleTimeout( 4000 ); // Wait 4 seconds before timing out any step
                          // involved in the facebook auth process

Configuration parameters can be scalars. But they can be anything. For example, they can also be functions, too. The facebook module has a configurable step named findOrCreateUser that is described as "STEP FN [findOrCreateUser] function encapsulating the logic for the step fetchOAuthUser.". What this means is that this configures the function (i.e., "FN") that encapsulates the logic of this step.

ea.facebook
  .findOrCreateUser( function (session, accessToken, extra, oauthUser) {
    // find or create user logic goes here
  });

How do we know what arguments the function takes? We elaborate more about step function configuration in our Introspection section below.

Introspection

everyauth provides convenient methods and getters for finding out about any module.

Show all configurable parameters with their descriptions:

everyauth.facebook.configurable();

Show the value of a single configurable parameter:

// Get the value of the configurable callbackPath parameter
everyauth.facebook.callbackPath(); // => '/auth/facebook/callback'

Show the declared routes (pretty printed):

everyauth.facebook.routes;

Show the steps initiated by a given route:

everyauth.facebook.route.get.entryPath.steps; 
everyauth.facebook.route.get.callbackPath.steps;

Sometimes you need to set up additional steps for a given auth module, by defining that step in your app. For example, the set of steps triggered when someone requests the facebook module's callbackPath contains a step that you must define in your app. To see what that step is, you can introspect the callbackPath route with the facebook module.

everyauth.facebook.route.get.callbackPath.steps.incomplete;
// => [ { name: 'findOrCreateUser',
//        error: 'is missing: its function' } ]

This tells you that you must define the function that defines the logic for the findOrCreateUser step. To see what the function signature looks like for this step:

var matchingStep =
everyauth.facebook.route.get.callbackPath.steps.filter( function (step) {
  return step.name === 'findOrCreateUser';
})[0];
// { name: 'findOrCreateUser',
//   accepts: [ 'session', 'accessToken', 'extra', 'oauthUser' ],
//   promises: [ 'user' ] }

This tells you that the function should take the following 4 arguments:

function (session, accessToken, extra, oauthUser) {
  ...
}

And that the function should return a user that is a user object or a Promise that promises a user object.

function (session, accessToken, extra, oauthUser) {
  ...
  return { id: 'some user id', username: 'some user name' };
}

// OR

function (session, accessToken, extra, oauthUser) {
  var promise = new everyauth.Promise();
  asyncFindUser( function (err, user) {
    if (err) return promise.fail(err);
    promise.fulfill(user);
  });
  return promise;
}

You add this function as the block for the step findOrCreateUser just like you configure any other configurable parameter in your auth module:

everyauth.facebook
  .findOrCreateUser( function (session, accessToken, extra, oauthUser) {
    // Logic goes here
  });

There are also several other introspection tools at your disposal:

For example, to show the submodules of an auth module by name:

everyauth.oauth2.submodules;

Other introspection tools to describe (explanations coming soon):

  • Invalid Steps

    everyauth.facebook.routes.get.callbackPath.steps.invalid
    

Modules and Projects that use everyauth

Currently, the following module uses everyauth. If you are using everyauth in a project, app, or module, get in touch to get added to the list below:

  • mongoose-auth Authorization plugin for use with the node.js MongoDB orm.

License

MIT License


Author

Brian Noguchi

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