Remove legacy express 3.x middleware getters

Remove middleware-getter properties that were simlifying upgrade from
LoopBack 1.x/Express 3.x applications:

  - loopback.compress
  - loopback.timeout
  - loopback.cookieParser
  - loopback.cookieSession
  - loopback.csrf
  - loopback.errorHandler
  - loopback.session
  - loopback.methodOverride
  - loopback.logger
  - loopback.responseTime
  - loopback.favicon
  - loopback.directory
  - loopback.vhost

Also remove `loopback.mime`, which was set to `undefined` anyways.

3.0-RELEASE-NOTES.md

@@ -99,3 +99,31 @@ Developers that are relying on these properties, can redefine them in `user.json
 ```
 
 Please see [Related code change](https://github.com/strongloop/loopback/pull/2299) here.
+
+## Remove getters for Express 3.x middleware
+
+Express 4.x stopped bundling commonly-used middleware. To simplify migration
+of LoopBack 1.x applications (powered by Express 3.x) to LoopBack 2.x (powered
+by Express 4.x), we created getter properties to allow developers to keep using
+the old convention.
+
+We have removed these getters in LoopBack 3.0, here is the full list of
+removed properties together with the middleware module name to use instead:
+
+ - `loopback.compress` - use `require('compression')` instead
+ - `loopback.timeout` - use `require('connect-timeout')` instead
+ - `loopback.cookieParser` - use `require('cookie-parser')` instead
+ - `loopback.cookieSession` - use `require('cookie-session')` instead
+ - `loopback.csrf` - use `require('csurf')` instead
+ - `loopback.errorHandler` - use `require('errorhandler')` instead
+ - `loopback.session` - use `require('express-session')` instead
+ - `loopback.methodOverride` - use `require('method-override')` instead
+ - `loopback.logger` - use `require('morgan')` instead
+ - `loopback.responseTime` - use `require('response-time')` instead
+ - `loopback.favicon` - use `require('serve-favicon')` instead
+ - `loopback.directory` - use `require('serve-index')` instead
+ - `loopback.vhost` - use `require('vhost')` instead
+
+We have also removed `loopback.mime`, which was always set to `undefined`.
+
+See [loopback#2349](https://github.com/strongloop/loopback/pull/2394).

lib/express-middleware.js

@@ -1,57 +0,0 @@
-// Copyright IBM Corp. 2014,2016. All Rights Reserved.
-// Node module: loopback
-// This file is licensed under the MIT License.
-// License text available at https://opensource.org/licenses/MIT
-
-var path = require('path');
-
-var middlewares = exports;
-
-function safeRequire(m) {
-  try {
-    return require(m);
-  } catch (err) {
-    return undefined;
-  }
-}
-
-function createMiddlewareNotInstalled(memberName, moduleName) {
-  return function() {
-    var msg = 'The middleware loopback.' + memberName + ' is not installed.\n' +
-      'Run `npm install --save ' + moduleName + '` to fix the problem.';
-    throw new Error(msg);
-  };
-}
-
-var middlewareModules = {
-  'compress': 'compression',
-  'timeout': 'connect-timeout',
-  'cookieParser': 'cookie-parser',
-  'cookieSession': 'cookie-session',
-  'csrf': 'csurf',
-  'errorHandler': 'errorhandler',
-  'session': 'express-session',
-  'methodOverride': 'method-override',
-  'logger': 'morgan',
-  'responseTime': 'response-time',
-  'favicon': 'serve-favicon',
-  'directory': 'serve-index',
-  // 'static': 'serve-static',
-  'vhost': 'vhost',
-};
-
-middlewares.bodyParser = safeRequire('body-parser');
-middlewares.json = middlewares.bodyParser && middlewares.bodyParser.json;
-middlewares.urlencoded = middlewares.bodyParser && middlewares.bodyParser.urlencoded;
-
-for (var m in middlewareModules) {
-  var moduleName = middlewareModules[m];
-  middlewares[m] = safeRequire(moduleName) || createMiddlewareNotInstalled(m, moduleName);
-}
-
-// serve-favicon requires a path
-var favicon = middlewares.favicon;
-middlewares.favicon = function(icon, options) {
-  icon = icon || path.join(__dirname, '../favicon.ico');
-  return favicon(icon, options);
-};

lib/loopback.js

@@ -29,7 +29,6 @@ var juggler = require('loopback-datasource-juggler');
  * ```
  *
  * @property {String} version Version of LoopBack framework.  Static read-only property.
- * @property {String} mime
  * @property {Boolean} isBrowser True if running in a browser environment; false otherwise.  Static read-only property.
  * @property {Boolean} isServer True if running in a server environment; false otherwise.  Static read-only property.
  * @property {Registry} registry The global `Registry` object.
@@ -47,12 +46,6 @@ var loopback = module.exports = createApplication;
 
 loopback.version = require('../package.json').version;
 
-/*!
- * Expose mime.
- */
-
-loopback.mime = express.mime;
-
 loopback.registry = new Registry();
 
 Object.defineProperties(loopback, {
@@ -128,23 +121,11 @@ function mixin(source) {
 mixin(require('./runtime'));
 
 /*!
- * Expose static express methods like `express.errorHandler`.
+ * Expose static express methods like `express.Router`.
  */
 
 mixin(express);
 
-/*!
- * Expose additional middleware like session as loopback.*
- * This will keep the loopback API compatible with express 3.x
- *
- * ***only in node***
- */
-
-if (loopback.isServer) {
-  var middlewares = require('./express-middleware');
-  mixin(middlewares);
-}
-
 /*!
  * Expose additional loopback middleware
  * for example `loopback.configure` etc.

package.json

@@ -41,7 +41,6 @@
     "body-parser": "^1.12.0",
     "canonical-json": "0.0.4",
     "continuation-local-storage": "^3.1.3",
-    "cookie-parser": "^1.3.4",
     "debug": "^2.1.2",
     "depd": "^1.0.0",
     "ejs": "^2.3.1",
@@ -62,6 +61,7 @@
   "devDependencies": {
     "browserify": "^10.0.0",
     "chai": "^2.1.1",
+    "cookie-parser": "^1.3.4",
     "es5-shim": "^4.1.0",
     "eslint-config-loopback": "^1.0.0",
     "grunt": "^0.4.5",

server/middleware/favicon.js

@@ -3,8 +3,14 @@
 // This file is licensed under the MIT License.
 // License text available at https://opensource.org/licenses/MIT
 
+var favicon = require('serve-favicon');
+var path = require('path');
+
 /**
  * Serve the LoopBack favicon.
  * @header loopback.favicon()
  */
-module.exports = require('../../lib/express-middleware').favicon;
+module.exports = function(icon, options) {
+  icon = icon || path.join(__dirname, '../../favicon.ico');
+  return favicon(icon, options);
+};

test/access-token.test.js

@@ -3,6 +3,7 @@
 // This file is licensed under the MIT License.
 // License text available at https://opensource.org/licenses/MIT
 
+var cookieParser = require('cookie-parser');
 var loopback = require('../');
 var extend = require('util')._extend;
 var Token = loopback.AccessToken.extend('MyToken');
@@ -500,7 +501,7 @@ function createTestApp(testToken, settings, done) {
 
   var app = loopback();
 
-  app.use(loopback.cookieParser('secret'));
+  app.use(cookieParser('secret'));
   app.use(loopback.token(tokenSettings));
   app.get('/token', function(req, res) {
     res.cookie('authorization', testToken.id, { signed: true });

test/loopback.test.js

@@ -58,19 +58,13 @@ describe('loopback', function() {
         'ValidationError',
         'application',
         'arguments',
-        'bodyParser',
         'caller',
-        'compress',
         'configureModel',
         'context',
-        'cookieParser',
-        'cookieSession',
         'createContext',
         'createDataSource',
         'createModel',
-        'csrf',
         'defaultDataSources',
-        'directory',
         'errorHandler',
         'favicon',
         'faviconFile',
@@ -80,12 +74,8 @@ describe('loopback', function() {
         'getModelByType',
         'isBrowser',
         'isServer',
-        'json',
         'length',
-        'logger',
         'memory',
-        'methodOverride',
-        'mime',
         'modelBuilder',
         'name',
         'prototype',
@@ -94,19 +84,14 @@ describe('loopback', function() {
         'remoteMethod',
         'request',
         'response',
-        'responseTime',
         'rest',
         'runInContext',
-        'session',
         'static',
         'status',
         'template',
-        'timeout',
         'token',
         'urlNotFound',
-        'urlencoded',
         'version',
-        'vhost',
       ];
 
       var actual = Object.getOwnPropertyNames(loopback);