node.js使用restify开发REST web services

文章主要包括restify开发api,node.js连接mysql返回json数据等。

restify简介

restify是一个基于Nodejs的REST应用框架,支持服务器端和客户端。restify比起express更专注于REST服务,去掉了express中的template, render等功能,同时强化了REST协议使用,版本化支持,HTTP的异常处理。

Github:node-restify

API:API DOCUMENTATION

restify安装

  • 新建项目
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mkdir nodejs_restify
cd nodejs_restify

npm install restify

出现以下内容表示安装成功

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restify@4.0.4 ../../../../node_modules/restify
├── assert-plus@0.1.5
├── tunnel-agent@0.4.2
├── escape-regexp-component@1.0.2
├── keep-alive-agent@0.0.1
├── negotiator@0.5.3
├── mime@1.3.4
├── lru-cache@2.7.3
├── formidable@1.0.17
├── node-uuid@1.4.7
├── qs@3.1.0
├── semver@4.3.6
├── spdy@1.32.5
├── once@1.3.3 (wrappy@1.0.1)
├── http-signature@0.11.0 (ctype@0.5.3, asn1@0.1.11)
├── verror@1.6.1 (core-util-is@1.0.2, extsprintf@1.2.0)
├── vasync@1.6.3 (verror@1.6.0)
├── backoff@2.4.1 (precond@0.2.3)
├── csv@0.4.6 (csv-generate@0.0.6, csv-stringify@0.0.8, stream-transform@0.1.1, csv-parse@1.0.1)
├── bunyan@1.7.0 (safe-json-stringify@1.0.3, moment@2.11.2, mv@2.1.1)
└── dtrace-provider@0.6.0 (nan@2.2.0)
  • 创建rest服务
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touch app.js
  • app.js内容
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var restify = require('restify');

function respond(req, res, next) {
  res.send('hello ' + req.params.name);
  next();
}

var server = restify.createServer({
   
   name: 'ds_api',
  version: '1.0.0'
});

server.get('/hello/:name', respond);
server.head('/hello/:name', respond);

server.listen(8081, function() {
  console.log('%s listening at %s', server.name, server.url);
});
  • 启动服务
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node app.js

listening at http://[::]:8081
  • 使用curl测试
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curl -is http://localhost:8081/hello/mark
HTTP/1.1 200 OK
Content-Type: application/json
Content-Length: 12
Date: Mon, 22 Feb 2016 06:57:42 GMT
Connection: keep-alive

"hello mark"

OK,我们创建了一个8080端口的rest服务,包括/hello/:name接口.
更多内容可以访问API DOCUMENTATION

Mysql服务

  • 安装mysql
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npm install felixge/node-mysql
  • app.js创建服务
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// 连接mysql
var mysql = require('mysql');
var conn = mysql.createConnection({
host: ‘ip’,
user: ‘user’,
password: ‘pasw’,
database:'ds_video',
port: 3306
});
  • 重写逗视获取视频的接口
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server.get('queryListVideo/:vid/:count/:type/:userId',function respond(req, res, next) {
 
 	conn.query( {

		 sql: 'select distinct v.title as title,v.id,v.url as videoUrl ,v.pic,v.type,v.createTime as pushTime ,'+
		
		'(select count(*) from `tb_user_video` tub WHERE tub.`status` = 1 AND tub.userId = ? AND tub.videoId = v.id) as isCollectStatus'+
		
		' from `tb_video` v where'+
		' v.title != ""   AND v.title not like "%#%" AND v.title not like "%@%" AND v.title not like "%微%"  '+
		' AND v.title not like "%秒拍%"  AND v.title not like "%号%" '+
		' AND v.title not like "%美拍%"   '+
		
		' AND type = ? '+

		'ORDER BY id DESC LIMIT ?' ,
		values: [req.params.userId,req.params.type,parseInt(req.params.count)]
	},

	 function(err, rows, fields) {
    if (err) throw err; 
        console.log('The title is: ', title = rows[0].title); 
    	res.send(200, res.json(rows));

	});  
   return next();
 });

创建了queryListVideo服务,/:vid/:count/:type/:userId 参数,

:vid格式传递参数,

req.params.vid获取参数值

res.json(rows) 数据json格式输出

res.send(200, res.json(rows)); 服务返回值 200HTTP状态码,res.json(rows)数据

1
conn.query( { 
     sql:  ’sql语句 ?’,
     values: [] // ? 填充值
   },
   
   function(err, rows, fields) { //数据库返回数据
   if (err) throw err;  
       res.send(200, res.json(rows));
   });

OK,我们测试一下吧!

服务地址:http://127.0.0.1:8081/queryListVideo/0/10/2/1

返回内容:

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[
  {
    "title": "我也是醉了",
    "id": 37729,
    "videoUrl": "http://mvvideo2.meitudata.com/56c8a0c08e10d5457.mp4",
    "pic": "http://mvimg1.meitudata.com/56c8a0bfef7c11168.jpg!thumb320",
    "type": 2,
    "pushTime": "2016-02-20T18:11:33.000Z",
    "isCollectStatus": 0
  },
  {
    "title": "女神如此难追",
    "id": 37727,
    "videoUrl": "http://mvvideo2.meitudata.com/56c7de946f8bb3420.mp4",
    "pic": "http://mvimg11.meitudata.com/56c8150c4fe9d9762.jpg!thumb320",
    "type": 2,
    "pushTime": "2016-02-20T18:11:32.000Z",
    "isCollectStatus": 0
  },
  {
    "title": "一个疯子+一个傻子=两张大饼脸️精彩活动️问:视频中我说了几个啥玩意儿完全即兴某人还不知道规则",
    "id": 37726,
    "videoUrl": "http://mvvideo1.meitudata.com/56c8a0186f59d9869.mp4",
    "pic": "http://mvimg2.meitudata.com/56c8a10eaa5394719.jpg!thumb320",
    "type": 2,
    "pushTime": "2016-02-20T18:11:32.000Z",
    "isCollectStatus": 0
  },
  {
    "title": "爆笑歌词梗",
    "id": 37704,
    "videoUrl": "http://mvvideo1.meitudata.com/56c0438416f2a3712.mp4",
    "pic": "http://mvimg10.meitudata.com/56c832793e9705833.jpg!thumb320",
    "type": 2,
    "pushTime": "2016-02-20T17:14:14.000Z",
    "isCollectStatus": 0
  },
  {
    "title": "情感专线-拜金女的那些事儿",
    "id": 37701,
    "videoUrl": "http://gslb.miaopai.com/stream/Lqn~dQ1tbuJ5KNkc~LAG1A__.m3u8",
    "pic": "http://wsacdn3.miaopai.com/stream/Lqn~dQ1tbuJ5KNkc~LAG1A___m.jpg",
    "type": 2,
    "pushTime": "2016-02-20T17:14:13.000Z",
    "isCollectStatus": 0
  },
  {
    "title": "一网友说她家鹦鹉笑起来好像她奶奶[笑cry]",
    "id": 37696,
    "videoUrl": "http://gslb.miaopai.com/stream/59hdWRg61qsMMwvT5BXPNg__.mp4?vend=miaopai&59hdWRg61qsMMwvT5BXPNg__.mp4miaopai",
    "pic": "http://wsacdn1.miaopai.com/stream/59hdWRg61qsMMwvT5BXPNg___tmp_11_363_.png",
    "type": 2,
    "pushTime": "2016-02-20T17:14:11.000Z",
    "isCollectStatus": 0
  },
  {
    "title": "捉迷藏1 这当爹的心太大了吧!这不摆明了坑儿子么?!",
    "id": 37681,
    "videoUrl": "http://gslb.miaopai.com/stream/fKPmQViX6eytWcD6XxR2Yw__.mp4?vend=miaopai&fKPmQViX6eytWcD6XxR2Yw__.mp4miaopai",
    "pic": "http://wsqncdn.miaopai.com/stream/fKPmQViX6eytWcD6XxR2Yw___m.jpg",
    "type": 2,
    "pushTime": "2016-02-20T16:12:51.000Z",
    "isCollectStatus": 0
  },
  {
    "title": "聚会上最装逼的人",
    "id": 37664,
    "videoUrl": "http://mvvideo1.meitudata.com/56c7fbce28caf6036.mp4",
    "pic": "http://mvimg1.meitudata.com/56c703002a0dc7724.jpg!thumb320",
    "type": 2,
    "pushTime": "2016-02-20T15:22:30.000Z",
    "isCollectStatus": 0
  },
  {
    "title": "现在的女生真的很现实",
    "id": 37659,
    "videoUrl": "http://mvvideo2.meitudata.com/56c87dd4057812379.mp4",
    "pic": "http://mvimg2.meitudata.com/56c87ded57b056131.jpg!thumb320",
    "type": 2,
    "pushTime": "2016-02-20T15:22:26.000Z",
    "isCollectStatus": 0
  },
  {
    "title": "断奶篇-唱回到过去",
    "id": 37658,
    "videoUrl": "http://gslb.miaopai.com/stream/aeNf6EQmnzUo4J22Ms~Tfg__.mp4?vend=miaopai&aeNf6EQmnzUo4J22Ms~Tfg__.mp4miaopai",
    "pic": "http://wsqncdn.miaopai.com/stream/aeNf6EQmnzUo4J22Ms~Tfg___m.jpg",
    "type": 2,
    "pushTime": "2016-02-20T15:22:25.000Z",
    "isCollectStatus": 0
  }
]

😀😀完成了今天的任务了。

总结

我们初步学会了创建REST API服务,在node.js中连接mysql以及sql的使用。但是这样的代码还有很多需要改进的地方,这是我们下一步要做的。

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