docs: change README & comment & UI to English

Author: weakish

README.md

@@ -1,52 +1,13 @@
 # Node.js Getting started
-在 LeanCloud 云引擎上使用 Express 的 Node.js 示例项目。
 
-若希望获取更多常见功能和代码片段，请访问 [leancloud/leanengine-nodejs-demos](https://github.com/leancloud/leanengine-nodejs-demos)。
+A simple Node.js application based on [express] for LeanEngine Node.js runtime.
 
-## 本地运行
+[express]: https://expressjs.com/
 
-首先确认本机已经安装 [Node.js](http://nodejs.org/) 运行环境和 [LeanCloud 命令行工具](https://leancloud.cn/docs/leanengine_cli.html)，然后执行下列指令：
+## Documentation
 
-```
-git clone https://github.com/leancloud/node-js-getting-started.git
-cd node-js-getting-started
-```
-
-安装依赖：
-
-```
-npm install
-```
-
-登录并关联应用：
-
-```
-lean login
-lean switch
-```
-
-启动项目：
-
-```
-lean up
-```
-
-之后你就可以在 [localhost:3000](http://localhost:3000) 访问到你的应用了。
-
-## 部署到 LeanEngine
-
-部署到预备环境（若无预备环境则直接部署到生产环境）：
-
-```
-lean deploy
-```
-
-## 相关文档
-
-* [云函数开发指南](https://leancloud.cn/docs/leanengine_cloudfunction_guide-node.html)
-* [网站托管开发指南](https://leancloud.cn/docs/leanengine_webhosting_guide-node.html)
-* [JavaScript 开发指南](https://leancloud.cn/docs/leanstorage_guide-js.html)
+* [Node.js Web Hosting Guide](https://docs.leancloud.app/leanengine_webhosting_guide-node.html)
+* [Node.js Cloud Function Guide](https://docs.leancloud.app/leanengine_cloudfunction_guide-node.html)
+* [LeanStorage JavaScript Guide](https://docs.leancloud.app/leanstorage_guide-js.html)
 * [JavaScript SDK API](https://leancloud.github.io/javascript-sdk/docs/)
-* [Node.js SDK API](https://github.com/leancloud/leanengine-node-sdk/blob/master/API.md)
-* [命令行工具使用指南](https://leancloud.cn/docs/leanengine_cli.html)
-* [云引擎常见问题和解答](https://leancloud.cn/docs/leanengine_faq.html)
+* [lean-cli Guide](https://docs.leancloud.app/leanengine_cli.html)

app.js

@@ -7,23 +7,24 @@ var cookieParser = require('cookie-parser');
 var bodyParser = require('body-parser');
 var AV = require('leanengine');
 
-// 加载云函数定义，你可以将云函数拆分到多个文件方便管理，但需要在主文件中加载它们
+// Loads cloud function defintions.
+// You can split it into multiple files but do not forget to load them in the main file.
 require('./cloud');
 
 var app = express();
 
-// 设置模板引擎
+// Configures template engine.
 app.set('views', path.join(__dirname, 'views'));
 app.set('view engine', 'ejs');
 
-// 设置默认超时时间
+// Confirues default timeout.
 app.use(timeout('15s'));
 
-// 加载云引擎中间件
+// Loads LeanEngine middleware.
 app.use(AV.express());
 
 app.enable('trust proxy');
-// 需要重定向到 HTTPS 可去除下一行的注释。
+// Uncomment the following line to redirect all HTTP requests to HTTPS.
 // app.use(AV.Cloud.HttpsRedirect());
 
 app.use(express.static('public'));
@@ -36,11 +37,11 @@ app.get('/', function(req, res) {
   res.render('index', { currentTime: new Date() });
 });
 
-// 可以将一类的路由单独保存在一个文件中
+// You can store routings in multiple files according to their categories.
 app.use('/todos', require('./routes/todos'));
 
 app.use(function(req, res, next) {
-  // 如果任何一个路由都没有返回响应，则抛出一个 404 异常给后续的异常处理器
+  // If there is no routing answering, throw a 404 exception to exception handlers.
   if (!res.headersSent) {
     var err = new Error('Not Found');
     err.status = 404;
@@ -51,7 +52,7 @@ app.use(function(req, res, next) {
 // error handlers
 app.use(function(err, req, res, next) {
   if (req.timedout && req.headers.upgrade === 'websocket') {
-    // 忽略 websocket 的超时
+    // Ignores websocket timeout.
     return;
   }
 
@@ -60,13 +61,13 @@ app.use(function(err, req, res, next) {
     console.error(err.stack || err);
   }
   if (req.timedout) {
-    console.error('请求超时: url=%s, timeout=%d, 请确认方法执行耗时很长，或没有正确的 response 回调。', req.originalUrl, err.timeout);
+    console.error('Request timeout: url=%s, timeout=%d, please check whether its execute time is too long, or the response callback is not proper.', req.originalUrl, err.timeout);
   }
   res.status(statusCode);
-  // 默认不输出异常详情
+  // Do not output exception details by default.
   var error = {};
   if (app.get('env') === 'development') {
-    // 如果是开发环境，则将异常堆栈输出到页面，方便开发调试
+    // Displays exception stack on page if in the development enviroment.
     error = err;
   }
   res.render('error', {

cloud.js

@@ -3,14 +3,14 @@ const fs = require('fs')
 const path = require('path')
 
 /**
- * 加载 functions 目录下所有的云函数
+ * Loads all cloud functions under the `functions` directory.
  */
 fs.readdirSync(path.join(__dirname, 'functions')).forEach( file => {
   require(path.join(__dirname, 'functions', file))
 })
 
 /**
- * 一个简单的云代码方法
+ * A simple cloud function.
  */
 AV.Cloud.define('hello', function(request) {
   return 'Hello world!'

routes/todos.js

@@ -4,7 +4,7 @@ var AV = require('leanengine');
 
 var Todo = AV.Object.extend('Todo');
 
-// 查询 Todo 列表
+// Todo list
 router.get('/', function(req, res, next) {
   var query = new AV.Query(Todo);
   query.descending('createdAt');
@@ -15,8 +15,7 @@ router.get('/', function(req, res, next) {
     });
   }, function(err) {
     if (err.code === 101) {
-      // 该错误的信息为：{ code: 101, message: 'Class or object doesn\'t exists.' }，说明 Todo 数据表还未创建，所以返回空的 Todo 列表。
-      // 具体的错误代码详见：https://leancloud.cn/docs/error_code.html
+      // Todo class does not exist in the cloud yet.
       res.render('todos', {
         title: 'TODO 列表',
         todos: []
@@ -27,7 +26,7 @@ router.get('/', function(req, res, next) {
   }).catch(next);
 });
 
-// 新增 Todo 项目
+// Creates a new todo item.
 router.post('/', function(req, res, next) {
   var content = req.body.content;
   var todo = new Todo();

server.js

@@ -8,19 +8,19 @@ AV.init({
   masterKey: process.env.LEANCLOUD_APP_MASTER_KEY
 });
 
-// 如果不希望使用 masterKey 权限，可以将下面一行删除
+// Comment the following line if you do not want to use masterKey.
 AV.Cloud.useMasterKey();
 
 var app = require('./app');
 
-// 端口一定要从环境变量 `LEANCLOUD_APP_PORT` 中获取。
-// LeanEngine 运行时会分配端口并赋值到该变量。
+// Retrieves the port number from environment variable `LEANCLOUD_APP_PORT`.
+// LeanEngine runtime will assign a port and set the environment variable automatically.
 var PORT = parseInt(process.env.LEANCLOUD_APP_PORT || process.env.PORT || 3000);
 
 app.listen(PORT, function (err) {
   console.log('Node app is running on port:', PORT);
 
-  // 注册全局未捕获异常处理器
+  // Registers a global exception handler for uncaught exceptions.
   process.on('uncaughtException', function(err) {
     console.error('Caught exception:', err.stack);
   });

views/index.ejs

@@ -6,8 +6,8 @@
   </head>
   <body>
     <h1>LeanEngine</h1>
-    <p>这是 LeanEngine 的示例应用</p>
-    <p>当前时间：<%= currentTime %></p>
-    <p><a href="/todos">一个简单的「TODO 列表」示例</a></p>
+    <p>This is a LeanEngine demo application.</p>
+    <p>Current date: <%= currentTime %></p>
+    <p><a href="/todos">A simple todo demo</a></p>
   </body>
 </html>

views/todos.ejs

@@ -8,7 +8,7 @@
     <h1><%= title %></h1>
     <form action="/todos" method="POST">
       <input type="text" name="content" />
-      <input type="submit" value="新增" />
+      <input type="submit" value="new todo" />
     </form>
     <ul>
       <% for(var i=0; i<todos.length; i++) {%>