crossplatform---Nodejs in Visual Studio Code 03.学习Express
1.开始
下载源码：https://github.com/sayar/NodeMVA
Express组件：npm install express -g（全局安装）
2.ExpressRest
打开目录08_ExpressREST
app.js
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var express = require('express');var app = express();<br>//捕获GET方法，并处理返回一个Json，比C#写Json简单多了啊app.get('/', function (req, res) { res.json({ message: 'hooray! welcome to our api!' });});<br>//侦听8080端口app.listen(process.env.PORT || 8080); |
现在项目都用html/js了，写个node几行代码搞定json restful，还带web服务器，感觉神清气爽啊！
打开CMD让项目运行起来
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$ cd 08_EXPRESSREST$ node app |
3.AdvancedRESTAPI
打开目录12_AdvancedRESTAPI
app.js：初始化Express环境注册路由
routes/api.js ：rest api的具体实现代码
app.js中，注册路由代码十分简单
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//初始化一个api.js实例var api = require('./routes/api');//初始化一个express.js实例var app = express();//将指定url路由处理程序指向api.js文件app.use('/api', api); |
routes/api.js中对每个api后的url按GET\PUT\POST\DELETE分别处理
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Resource |
GET |
PUT |
POST |
DELETE |
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Collection URI, such as http://api.example.com/v1/dogs/ |
List all the dogs |
Replace all the dogs with a new collection of dogs. |
Create a new dog in the collection. |
Delete the entire dog collection. |
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Element URI, such as http://api.example.com/v1/dog/1 |
Get a specific dog. |
Replace a dog in the collection with another dog. |
Not used. |
Delete the dog from the collection. |
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var express = require('express');var router = express.Router();var dogs = [ { "dog_id": "0", "dog_name": "Ginger" }, { "dog_id": "1", "dog_name": "Ruby" }, { "dog_id": "2", "dog_name": "Buddy" }];/* GET all dogs */router.get('/dogs/', function(req, res, next) { res.json(dogs);});/* PUT replace all dogs */router.put('/dogs/', function(req, res, next) { console.log(req.body); dogs = req.body; res.json({"STATUS": "200 OK"});});/* POST create a new dog */router.post('/dogs/', function(req, res, next) { dogs.push(req.body) res.json({"STATUS": "200 OK"});});/* DELETE delete the entire dog collection */router.delete('/dogs/', function(req, res, next) { dogs = []; res.json({"STATUS": "200 OK"});});/* GET a specific dog */router.get('/dogs/:id', function(req, res, next) { var i = 0; var dog = null; for(i = 0; i != dogs.length; i++){ if(dogs[i].dog_id == req.params.id){ dog = dogs[i]; break; } } dog !== null ? res.json(dog) : res.json({"STATUS": "404 NOT FOUND"})});/* PUT replace a specific dog with another dog */router.put('/dogs/:id', function(req, res, next) { var i = 0; var dog = null; for(i = 0; i != dogs.length; i++){ if(dogs[i].dog_id == req.params.id){ dog = dogs[i]; break; } } if(dog !== null){ dog.dog_name = req.body['dog_name'] res.json({"STATUS": "200 OK"}); } else { res.json({"STATUS": "404 NOT FOUND"}); }});/* DELETE a specific dog from the collection */router.delete('/dogs/:id', function(req, res, next) { var i = 0; for(i = 0; i != dogs.length; i++){ if(dogs[i].dog_id == req.params.id){ dogs.splice(i, 1); return res.json({"STATUS": "200 OK"}); } } return res.json({"STATUS": "404 NOT FOUND"});});module.exports = router; |
http://www.cnblogs.com/mengkzhaoyun/p/5355796.html
