co-log/README.md

Port of log4js work for node.RequestId is supported.

# co-log
基于log4js的nodejs日志库，支持requestId输出，支持koa.
## Install
```git
npm i co-log
```
## Usage
```js
import {Log} from 'co-log';

let log = new Log({path: '/opt/yourpath'});
```
## Options
初始化参数
- `'path'` - `string`类型，日志存放路径
```js
const options= {
    path: '/opt/yourpath'
}
```

## RequestId设置
### `log.setRequestId(string)`
在function中设置requestId，所有`console.log`打印都带requestId
```js
async function test() {
    log.setRequestId('ae21f206375744f0b6188f45b7f856d3')
    console.log({a:1})
    //[2022-11-24 23:18:47.160] [INFO] - ae21f206375744f0b6188f45b7f856d3 {a:1}
}
```
### `log.setRequestIdForKoa()`
返回koa框架的中间件，所有api请求都自带requestId
```js
const Koa = require('koa')
const app = new Koa()
//第一个引入log的中间件
app.use(log.setRequestIdForKoa());
...
```