# node-Express
**Repository Path**: hcsy/node-Express
## Basic Information
- **Project Name**: node-Express
- **Description**: node-Express 学习
- **Primary Language**: Unknown
- **License**: Not specified
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No
## Statistics
- **Stars**: 0
- **Forks**: 0
- **Created**: 2018-10-31
- **Last Updated**: 2020-12-19
## Categories & Tags
**Categories**: Uncategorized
**Tags**: None
## README
# node-Express
https://blog.csdn.net/oYuLian/article/details/83991191
#### 项目介绍
node-Express 学习
该框架还不支持import 和 export defualt
用 module.export 和 require() 代替
session 会话缓存管理
过滤器
全局异常捕获
model
依赖注入
查询索引
会话结合redis
cheerio 爬虫使用
同步的数据库操作
Nodejs学习笔记（十二）--- 定时任务（node-schedule) https://www.cnblogs.com/zhongweiv/p/node_schedule.html
#### 软件架构
软件架构说明
会话保持，
登录拦截，
查询失败返回
查询成功返回
日志打印
路由管理
系统时间
connection.query 请求数据库返回的数据本身就是JSON类型
request 请求别的接口的需要使用 JSON.parse() 处理
#### 安装教程
> https://blog.csdn.net/qq_26562641/article/details/76976112
```
$ npm install express-generator -g // npm install 是安装任何第三方包的命令， express-generator -g 指在全局范围下安装名为 express-generator 的第三方包。
express myapp //指在当前命令行目录下创建一个名为myapp的文件夹用来做应用目录
cd myapp //到达我们的工作目录
npm install
npm start // 或者 node app.js 或者其实还有很多的奇淫巧计
http://localhost:3000/
```
10点还款金：我的=>无卡支付=>下拉到底部=>还款金（自动更新，不用刷新页面）:
11点饭票：首页=>饭票=>百元红包
14点商城无门槛红包：
15点9积分抢：
#### 使用说明
1. xxxx
2. xxxx
3. xxxx
#### 参与贡献
1. Fork 本项目
2. 新建 Feat_xxx 分支
3. 提交代码
4. 新建 Pull Request
#### 码云特技
#### console.log(req) console.log(res)
secret: undefined,
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finished: true,
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socket: null,
connection: null,
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_onPendingData: [Function: bound updateOutgoingData],
_sent100: false,
_expect_continue: false,
req: [Circular],
locals: {},
_startAt: [ 68354, 671517176 ],
_startTime: 2018-11-12T07:16:01.836Z,
writeHead: [Function: writeHead],
__onFinished: null,
statusCode: 304,
statusMessage: 'Not Modified',
[Symbol(outHeadersKey)]:
{ 'x-powered-by': [Array],
'accept-ranges': [Array],
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_startTime: 2018-11-12T07:16:01.833Z,
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body: {},
secret: undefined,
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slashes: null,
auth: null,
host: null,
port: null,
hostname: null,
hash: null,
search: null,
query: null,
pathname: '/stylesheets/style.css',
path: '/stylesheets/style.css',
href: '/stylesheets/style.css',
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--------------------------------------------br----------------------------------------------------
ServerResponse {
domain: null,
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output: [],
outputEncodings: [],
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req:
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readingMore: true,
decoder: null,
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readable: true,
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socket:
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server: [Object],
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connection:
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httpVersionMajor: 1,
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etag: [ 'ETag', 'W/"6f-166c8b58b11"' ] } }
--------------------------------------------end----------------------------------------------------
app.post('/login',urlencodedParser,function(req,res){
//console.log(req);
console.log(req.body);
var user_name=req.body.user;
var password=req.body.password;
console.log("User name = "+user_name+", password is "+password);
res.end("yes");
});
app.get('/about', function (req, res) { //设置about页面的路由 用 '/about' 表示
var num = req.query.num;
res.send("你获取的get数据为:" + num);
})
简单来说就是 如果服务器端没有数据返回到客户端 那么就可以用 res.end
但是 如果 服务器端有数据返回到客户端 这个时候必须用res.send ,不能用 res.end（会报错）
还有一个res.json() 方法功能和res.send()效果相似
res.json(null);
res.json({user:'tobi'});
res.status(500).json({error:'message'});
res.send(new Buffer('whoop'));
res.send({some:'json'});
res.send('some html
');
res.status(404).send('Sorry, we cannot find that!');
res.status(500).send({ error: 'something blew up' });
res.set('Content-Type', 'text/html');
res.send(new Buffer('some html
'));
XYP:
https://auth.yemadai.com/login
XYP:
zhangjihao@3c-buy.com
XYP:
YYO2251sf
XYP:
2672949309@qq.com
app.get('/user', (req, res) => {
connection.connect()//连接数据库
connection.query('SELECT * FROM `user`', function (err, rows, fields) {
loggerInfo.info("男男女女女", err, rows, fields);
if (err) {
res.send({
code: 500,
data: "操作失败",
msg: ""
});
throw err
}
console.log('The solution is: ', rows, fields);
res.json(rows);
})
connection.end()//关闭连接数据库 //在res.json()之后还是可以执行的
})
//查询
app.get('/userGet', function (req, res) {
let sqlString = "SELECT * FROM `user`";
// mydb.query(sqlString, function (error, results, fields) {
// loggerInfo.info("操作userGet",error, results, fields);
// res.json(error);
// });
connection.query(sqlString, function (error, results, fields) {
console.log(product);
loggerInfo.info("操作", error, results);
if (error) throw error;
res.json(results);
});
return;
})