如何使用快速中间件来处理所有路由？

Question

I have issue setting up routes for user in below code, I want to use express middleware and trying routes using app.use .

index.js is invoking user controller method once api's is being called So in below code i am trying to post data api/users from client but it returns 404.

How can i fix this issue using below routes setup ?

server.js

var express        = require('express');
var app            = express();
var bodyParser     = require('body-parser');
var methodOverride = require('method-override');
var mongoose = require('mongoose');
console.log(mongoose.connection.readyState);
var db = require('./config/db');
var port = process.env.PORT || 8080; 
mongoose.connect(db.url); 
app.use(methodOverride('X-HTTP-Method-Override')); 
app.use(express.static(__dirname + '/public')); 

require('./app/routes')(app); // configure our routes
require('./config/express')(app); 
app.listen(port);                                  
console.log('listening on port ' + port);          
exports = module.exports = app;

app > routes.js

 module.exports = function(app) {


        app.use('api/users', require('./api/user'));
        app.get('*', function(req, res) {
            res.sendfile('./public/views/index.html'); // load our public/index.html file
           // res.sendFile(path.join(__dirname, ''../public/views/index.html'')); 
        });

    };

config > express.js

var express = require('express');
var morgan = require('morgan');
var bodyParser = require('body-parser');
// import cookieParser from 'cookie-parser';
// import errorHandler from 'errorhandler';
var path = require('path');
// import lusca from 'lusca';
var config = require('./db');
var mongoose = require('mongoose');
//var mongoStore = connectMongo(session);

module.exports = function(app) {
 // app.engine('html', require('ejs').renderFile);
  app.set('view engine', 'html');
  app.use(bodyParser.urlencoded({ extended: false }));
  app.use(bodyParser.json());
  app.use(methodOverride());
}

User index where i will handle all crud operation for user

app > api > user > index.js

var express = require('express');
var controller = require('./user.controller');

var router = express.Router();

router.get('/', controller.index);
router.post('/',controller.create);

module.exports = router;

Answer 1

1st:

To handle all request

Bind application-level middleware to an instance of the app object by using the app.use() and app.METHOD() functions, where METHOD is the HTTP method of the request that the middleware function handles (such as GET, PUT, or POST) in lowercase .

This example shows a middleware function with no mount path. The function is executed every time the app receives a request .

app.use(function(req,res)
   {

        res.sendfile('./public/views/index.html');
       console.log("Not found....I will handle *unhandle* rout here for you");
})

// app.get('*', function(req, res) use the above function instead of this

But this function at the end so it will only excute when no route path found to the app object. Express documentation

2nd:

To handle createuser

var express = require('express');
var controller = require('./user.controller');

var router = express.Router();
// you must define route which you want to handle in user file
router.get('/api/user', controller.index);

router.post('/',controller.create);

module.exports = router;

Update working example with some explanation

Your app.js file

var express=require('express')
var app=express()
app.use('api/user',require('./user'))
app.use('/',require('./user'))
app.use(function(req,res)
       {
    res.sendfile('stack10.html')
    console.log("Not found....I will handle *unhandle* rout here for you");
})
app.listen(8080,function()

          {
    console.log("server listening on port 8080")
})

user.js

var express = require('express')
var router = express.Router()
var app=express()
router.get('/api/user', function(req, res) {
  res.send('respond for ..../api/user')
});
router.get('/',function (req,res) {
   res.send('respose for ..../')
})
module.exports = router;

Your app.use will be app.use(api/user) while in user will be router.get(/api/user) so when u try http://127.0.0.1:8080/api/user your response will be respond for ..../api/user