错误：enoent：Angular2和express.js没有这样的文件或目录

Question

Error: ENOENT: no such file or directory

为了解决错误:enoent:no sock file或directory需要对GitHub示例中的代码进行哪些特定的更改？

'use strict';
let uuid = require('node-uuid');
var path = require('path');
let jwt = require('jsonwebtoken');
let config = require('./config');

// expose the routes to our app with module.exports
module.exports = function(app) {

    //all other methods omitted here for brevity

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

对localhost:8080的请求的nodemon控制台输出将触发上面的express.jsapp.get('*'...)方法，反复导致错误：

App listening on port 8080
inside * route!
GET / 304 54.261 ms - -
inside * route!
inside * route!
inside * route!
GET /boot.css 304 4.637 ms - -
GET /boot.js 304 4.447 ms - -
GET /vendor.js 304 3.742 ms - -
inside * route!
GET /vendor.js.map 200 3.180 ms - 3115631
inside * route!
GET /boot.js.map 200 2.366 ms - 61810
inside * route!
GET /bootstrap.css.map 404 2.515 ms - 169
Error: ENOENT: no such file or directory, stat '/home/user/nodejs_apps/angular2_oauth_seed_app/dist/client/bootstrap.css.map'
    at Error (native)

新的服务器/index.js指定express.js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('/static', express.static(__dirname + '/dist/client'));
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);

除了package.json之外，GitHub示例应用程序中的所有其他内容都与您在GitHub上看到的内容相同，它只包含支持router.js和index.js中更改的依赖项，如上图所示。

Answer 1

Bootstrap.css.map指示浏览器正试图加载引导CSS的源映射（这是一个调试工具）。

只有当您打开浏览器的开发人员工具时才会发生这种情况，所以严格来说不是问题（除非您想实际调试Bootstrap的CSS）。除此之外，还可能请求其他URL并产生相同的错误。

解决方案是在SendFile中添加一个显式错误处理程序，并假设当发生错误时，是因为文件不存在（因此应该产生404响应）：

res.sendFile(path.resolve('./dist/client' + req.url), (err) => {
  if (err) return res.sendStatus(404);
});