在 Express.js 中处理对路由的多个回调

Question

我读过the Express.js documentation，它谈到了使用如下语法处理路由回调：

app.get(path, callback [, callback ...])

但是，我似乎找不到一个很好的语法示例来处理包罗万象的* 路由的多个回调。具体来说，路由处理程序需要：

1.) 使用index.html 处理所有视图请求，但随后
2.) 通过返回适当的文件为index.html 中指定的资产提供回调请求。

需要什么特定语法来管理所有回调，以便 Express.js 服务器返回每个请求的资源文件，包括 JavaScript、css 等？

当我使用以下内容时：

app.get('*', function(req, res) {
    console.log('inside * route!');           
    if(req.accepts('html')){
        console.log('req.accepts html');
        console.log('req.url is: '+ req.url);
    }
    if(req.accepts('text/html')){
        console.log('req.accepts text/html');
        console.log('req.url is: ' + req.url);
    }
    if(req.accepts('application/json')){
        console.log('req.accepts application/json');
        console.log('req.url is: ' + req.url);
    }
    if(req.accepts('json', 'text')){
        console.log('req.accepts json, text');
        console.log('req.url is: ' + req.url);
    }
    if(req.accepts('text/javascript')){
        console.log('req.accepts html');
        console.log('req.url is: ' + req.url);
    }
    if(req.accepts('text/css')){
        console.log('req.accepts text/css');
        console.log('req.url is: ' + req.url);
    }
    res.sendFile(path.resolve('dist/client/index.html')); // load the single view file (angular will handle the front-end)
});

结果是：

1.) index.html 用于响应每种文件类型的每个请求，包括 JavaScript、css 等。
2.) 条件语句不区分所请求文件的内容类型。

控制台打印出来的记录是：

App listening on port 8080

inside * route!
req.accepts html
req.url is: /
req.accepts text/html
req.url is: /
req.accepts application/json
req.url is: /
req.accepts json, text
req.url is: /
req.accepts html
req.url is: /
req.accepts text/css
req.url is: /
GET / 304 30.181 ms - -

inside * route!
req.accepts html
req.url is: /boot.css
req.accepts text/html
req.url is: /boot.css
req.accepts application/json
req.url is: /boot.css
req.accepts json, text
req.url is: /boot.css
req.accepts html
req.url is: /boot.css
req.accepts text/css
req.url is: /boot.css

inside * route!
req.accepts html
req.url is: /vendor.js
req.accepts text/html
req.url is: /vendor.js
req.accepts application/json
req.url is: /vendor.js
req.accepts json, text
req.url is: /vendor.js
req.accepts html
req.url is: /vendor.js
req.accepts text/css
req.url is: /vendor.js

inside * route!
req.accepts html
req.url is: /boot.js
req.accepts text/html
req.url is: /boot.js
req.accepts application/json
req.url is: /boot.js
req.accepts json, text
req.url is: /boot.js
req.accepts html
req.url is: /boot.js
req.accepts text/css
req.url is: /boot.js
GET /boot.css 304 2.213 ms - -
GET /vendor.js 304 2.886 ms - -
GET /boot.js 304 2.638 ms - -

作为参考，Express.js 应用的根 index.html 是：

// set up ======================================================================
var express  = require('express');
var app      = express();                               // create our app w/ express
var port     = process.env.PORT || 8080;                // set the port
var morgan = require('morgan');             // log requests to the console (express4)
var bodyParser = require('body-parser');    // pull information from HTML POST (express4)
var methodOverride = require('method-override'); // simulate DELETE and PUT (express4)

app.use(express.static(__dirname + '/dist/client'));                 // set the static files location /public/img will be /img for users
app.use(morgan('dev'));                                         // log every request to the console
app.use(bodyParser.urlencoded({'extended':'true'}));            // parse application/x-www-form-urlencoded
app.use(bodyParser.json());                                     // parse application/json
app.use(bodyParser.json({ type: 'application/vnd.api+json' })); // parse application/vnd.api+json as json
app.use(methodOverride());
app.use('/scripts', express.static(__dirname + '/node_modules/'));

// load the routes
require('./router')(app);

// listen (start app with node server.js) ======================================
app.listen(port);
console.log("App listening on port " + port);

Answer 1

你想做的事可以使用static files serving来完成。

如官方文档中所述，您只需使用以下代码即可为所有资产（.js、.css 等）提供服务：

app.use('/static', express.static(__dirname + '/public'));