getUser function

• Usual additions
• ConnectionManager class
• daoBuilder function
• User class
• getUser function
• getLocale function

The function should return the current user or null. The user object must inherit UserInfo class and implement its isInRole() method. See User class page.

The example application uses a middleware named accessToken to handle authentication:

'use strict';

var express = require('express');
var accessToken = require('./access-token.js');

var createNamespace = require('continuation-local-storage').createNamespace;
var namespace = createNamespace('com.example');

var app = express();
...
app.all('*', accessToken.verify);
...

The middleware stores the user information in the context of the request. The context is maintained by the continuation-local-storage module:

var getNamespace = require('continuation-local-storage').getNamespace;
var namespace = getNamespace('com.example');

// Extract the token from the header Authorization.
function extractTokenFromHeader (headers) {
  ...
}

// Gets the associated data of the token from the session store.
function getDataByToken (token, callback) {
  ...
}

// Middleware to verify the token and store the user data in the request context.
exports.verify = function(req, res, next) {
  var headers = req.headers;
  if (headers == null) next();

  // Get token.
  try {
    var token = extractTokenFromHeader(headers);
  } catch (err) {
    console.log(err);
    return next();
  }

  // Verify it in session store and set data into user property of the context.
  getDataByToken(token, function(err, data) {
    if (err) {
      console.log(err);
      return next();
    }

    namespace.bindEmitter(req);
    namespace.bindEmitter(res);

    namespace.run(function() {
      namespace.set('user', data);
      next();
    });
  });
};

So the getUser() function will be:

'use strict';

var getNamespace = require('continuation-local-storage').getNamespace;
var namespace = getNamespace('com.example');

var getUser = function (req) {
  return namespace.get('user');
};

module.exports = getUser;