Add app using loopback-context

example/app.js

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+// Copyright IBM Corp. 2014,2016. All Rights Reserved.
+// Node module: loopback-context
+// This file is licensed under the MIT License.
+// License text available at https://opensource.org/licenses/MIT
+
+'use strict';
+
+var contextPerRequest = require('../server/middleware/per-request.js');
+// Use `var lbContext = require('loopback-context');` in your app
+var lbContext = require('../');
+var loopback = require('loopback');
+
+var app = loopback();
+
+// Configure the context middleware
+app.middleware('initial', contextPerRequest());
+
+// Store a request property in the context
+app.use(function saveHostToContext(req, res, next) {
+  var currentContext = lbContext.getCurrentContext();
+  if (currentContext)
+    currentContext.set('host', req.hostname);
+  next();
+});
+
+app.use(loopback.rest());
+
+var Color = loopback.createModel('color', {name: String});
+Color.beforeRemote('**', function(ctx, unused, next) {
+  // Inside LoopBack code, you can read the property from the context
+  var currentContext = lbContext.getCurrentContext();
+  if (currentContext)
+    console.log('Request to host %s',
+      currentContext && currentContext.get('host'));
+  next();
+});
+
+app.dataSource('db', {connector: 'memory'});
+app.model(Color, {dataSource: 'db'});
+
+app.listen(3000, function() {
+  console.log('A list of colors is available at http://localhost:3000/colors');
+});