javascript - Express 路由器不适用于发布请求

Question

我正在着手处理整个 MEAN Stack。我正在整理一个小型测试/初学者应用程序来学习基础知识。我目前正在尝试使用不同路线的快速路由器。我在使路由正常工作时遇到了一些问题。

当我转到 localhost:8000/api 时，它工作正常。但是当我尝试访问 localhost:8000/api/users 时，它返回一个 404 错误 :(

这是我的代码

var express = require('express');
var app = express(); 
var bodyParser = require('body-parser'); 
var morgan = require('morgan'); 
var mongoose = require('mongoose'); 
var port = process.env.PORT || 8000; 
var User = require('./app/models/user');

mongoose.connect('mongodb://localhost:27017/ApiDataBase');

app.use(bodyParser.urlencoded({ extended: true}));
app.use(bodyParser.json());

app.use(function(req, res, next) 
{
  res.setHeader('Access-Control-Allow-Origin', '*');
  res.setHeader('Access-Control-Allow-Methods', 'GET', 'POST');
  res.setHeader('Access-Control-Allow-Headers', 'X-Requested-With,content-type, \
22 Authorization');
  next();
});

app.use(morgan('dev'));

// testing if express runs

app.get('/', function(req, res) {
  res.send('Welcome to this awesome site!');
});

// creating new instance of the router

var apiRouter = express.Router();

apiRouter.use(function(req, res, next){

  console.log('Somebody came to vist');

  next();
});

// testing the router

apiRouter.get('/', function(req, res) {
  res.json({ message: 'WWWUUUUHHÚÚÚ Welcome!'});
});

// I'm not getting this part to work

apiRouter.route('/users')

  .post(function(req, res) {

    var user = new User();

    user.name = req.body.name;
    user.username = req.body.username;
    user.password = req.body.password;

    user.save(function(err) {
        if(err){

            if(err.code == 11000)
                return res.json({ success: false, message: 'Þessi notandi er þegar til'});
            else
                return res.send(err);
        }

            res.json({ message: 'Notandi stofanður'});
    });


})

app.use('/api', apiRouter);

app.listen(8000);
console.log('Magic happens on port' + port);

Answer 1

when I try to access localhost:8000/api/users it returns a 404 error

你没有到 localhost:8000/api/users 的 GET 路由，你有一个到它的 POST 路由:

apiRouter.route('/users')

  .post(function(req, res) {

也就是说，当你向localhost:8000/api/users发送一个GET请求时，express找不到路由，因为你它不存在.您应该针对 POST 请求对其进行测试。