crossplatform---Nodejs in Visual Studio Code 03.学习Express

varexpress = require('express');

varapp = 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);

$cd08_EXPRESSREST

$ node app

//初始化一个api.js实例

varapi = require('./routes/api');

//初始化一个express.js实例

varapp = express();

//将指定url路由处理程序指向api.js文件

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

varexpress = require('express');

varrouter = express.Router();

vardogs = [

{

"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) {

vari = 0;

vardog =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) {

vari = 0;

vardog =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) {

vari = 0;

for(i = 0; i != dogs.length; i++){

if(dogs[i].dog_id == req.params.id){

dogs.splice(i, 1);

returnres.json({"STATUS":"200 OK"});

}

}

returnres.json({"STATUS":"404 NOT FOUND"});

});

module.exports = router;