Express.js处理未路由 [英] Express.js Handle unmached routes

问题描述

研究员，我开发了Rest API，我想在不存在路由时发送自定义消息，而不是默认情况下express.js发送的html消息.正如我搜寻时所发现的那样，我找不到解决办法.

Fellows I develop a Rest API and I want when a route does not exist to send a custom message instead of an html one that express.js sends by default. As fas as I searched I could not find a way to do that.

我试图做:

  app.all("*",function(req,res){
     res.status(404)
     res.header("Content Type","application/json")
     res.end(JSON.stringify({message:"Route not found"}))
  });

但是它与所有已经实现的方法匹配.我只希望未完成的任务可以由我的应用程序处理.

But it matches and all already implemented methods. I want only the unmached one to get handled by my app.

对于每个集合点，我创建一个单独的文件，其内容如下: myendpoint.js

For each enndpoint I create a seperate file having the following content: eg. myendpoint.js

module.exports=function(express){

   var endpoint="/endpoint"

   express.get(endpoint,function(req,res){
      res.end("Getting data other message")
   }).post(endpoint.function(req,res){
      res.end("Getting data other message")
   }).all(endpoint,function(req,res){
      res.status(501)
      res.end("You cannot "+res.method+" to "+endpoint)
   })
}

在我使用的主文件中:

var endpoint=require('myendpoint.js')
var MyEndpointController=endpoint(app)
app.all("*",function(req,res){
   res.status(404)
   res.header("Content Type","application/json")
   res.end(JSON.stringify({message:"Route not found"}))
});

推荐答案

1.声明所有路线

2.将不匹配的路由请求定义为错误地重新放置在结束处.

2.Define unmatched route request to error respose AT the END.

您必须在应用程序中进行设置.(应用程序使用)不在路由中.

This you have to set it in the app. (app.use) not in the routes.

Server.js

//Import require modules
var express = require('express');
var bodyParser = require('body-parser');

// define our app using express
var app = express();

// this will help us to read POST data.
app.use(bodyParser.urlencoded({ extended: true }));

app.use(bodyParser.json());

var port = process.env.PORT || 8081;    

// instance of express Router
var router = express.Router(); 

// default route to make sure , it works.
router.get('/', function(req, res) {
    res.json({ message: 'hooray! welcome to our api!' });   
});

// test route to make sure , it works.
router.get('/test', function(req, res) {
    res.json({ message: 'Testing!' });   
});


// all our routes will be prefixed with /api
app.use('/api', router);

// this is default in case of unmatched routes
app.use(function(req, res) {
// Invalid request
      res.json({
        error: {
          'name':'Error',
          'status':404,
          'message':'Invalid Request',
          'statusCode':404,
          'stack':'http://localhost:8081/'
        },
         message: 'Testing!'
      });
});

// state the server
app.listen(port);

console.log('Server listening on port ' + port);

---

请注意:我的路线中带有前缀"/api".

---

Please note : I have prefix '/api' in my routes.

请尝试 http://localhost:8081/api

您将看到'{"message":万岁！欢迎使用我们的api！"}'

You will see '{"message":"hooray! welcome to our api!"}'

当您尝试 http://localhost:8081/api4545 -这不是有效路由

When you try http://localhost:8081/api4545 - which is not a valid route

您将看到错误消息.

这篇关于Express.js处理未路由的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！