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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

mkdir nodejs_restify cd nodejs_restify  npm install restify

出现以下内容表示安装成功

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

touch app.js

app.js内容

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

node app.js  listening at http://[::]:8081

使用 curl 测试

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

npm install felixge/node-mysql

在 app.js 创建服务

// 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

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 200 HTTP状态码， res.json(rows) 数据

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：

[   {     "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   } ]

ðð完成了今天的任务了。