hapi-jot

JWT (JSON Web Token) authentication plugin for hapi.

Documentation

API Documentation

Example

'use strict';

const Hapi = require('hapi');
const Hoek = require('hoek');

const users = {
   jappleseed: {
       id: 1,
       password: 'loveThoseApples', // 'secret'
       name: 'Johnny Appleseed',
       username: 'jappleseed'
   }
};

const server = new Hapi.Server();

server.connection({ host: 'localhost', port: 3000 });

// Register jot with the server
server.register(require('hapi-jot'), (err) => {

   // Handle jot validation errors
   Hoek.assert(!err, err);

   // Declare an authentication strategy using the jwt scheme
   // with the secret key to sign and verify the JWT with, 
   // and the validation function to validate user credentials.
   //
   // The strategy exposes a '/token' endpoint to generate a JWT.
   // A POST request to '/token' with { username: 'jappleseed, password: 'apples' }
   // will respond with a token in the format of:
   // { token: 'eyJ0eXAiOiJKV1QiLCJhbGciO...' }
   server.auth.strategy('token', 'jwt', {
       key: 'mySuperSecretKey',
       validateFunc: (request, callback) => {

           // access the request parameters
           const username = request.payload.username;
           const password = request.payload.password;

           const user = users[username];
           if (!user) {
               return callback(null, false);
           }

           // Perform the validation, obviously
           // passwords shouldn't be stored in plain-text
           // in practice.
           if (user.password === password) {

               callback(null, true, { id: user.id, username: user.username });
           }
           else {

               callback(null, false);
           }


       }
   });


   // Use the 'token' authentication strategy to protect the
   // endpoint that gets the authenticate user's name.
   //
   // In order to authenticate with this endpoint, a valid token
   // must be sent in the 'Authorization' header of the request.
   // 
   // The header takes the form of:
   // 'Authorization': 'Bearer eyJ0eXAiOiJKV1QiLCJhbGciO...'
   server.route({
       method: 'GET',
       path: '/user',
       config: {
           auth: {
               strategy: 'token'
           },
           handler: function (request, reply) {

               if (!request.auth.isAuthenticated) {
                   return reply('Authentication failed due to: ' + request.auth.error.message);
               }

               // Perform the account lookup by using the credentials
               // stored in request.auth.credentials.
               const user = users[request.auth.credentials.username];

               return reply({ name: user.name });
           }
       }
   });

   server.start((err) => {

       Hoek.assert(!err, err);
       console.log(`Server started at: ${server.info.uri} \n\n`);

       console.log(`1.  To generate a token.`);
       console.log(`POST to ${server.info.uri}/token with the following JSON:\n`);

       console.log({
           username: 'jappleseed',
           password: 'loveThoseApples'
       });

       console.log(`\n\n2. To access the secured route include the token as a header in the request.`);

       console.log(`GET to ${server.info.uri}/user with the following header:\n`);

       console.log({
           'Authorization': 'Bearer (token value)'
       });
   });
});