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midway-throttler

v1.0.4

Published

midway throttler base on traffic-throttler

Downloads

20

Readme

midway-throttler

midway request throttler component, based on traffic-throttler。 It's core design base on @nestjs/throttler, and API will same as @nestjs/throttler.

这是基于 midway 3.0 的限流器组件模块,基于 traffic-throttler 封装。核心逻辑来自 @nestjs/throttler, API 用法也尽量与其保持一致

Install (安装)

npm i midway-throttler --save

Usage(用法)

1. 引入组件

首先在 src/configuration.ts 中引入组件,并且配置全局守卫

import * as throttler from 'midway-throttler';
import { ThrottlerGuard } from 'midway-throttler';
import * as koa from '@midwayjs/koa';

@Configuration({
  imports: [koa, throttler], //import throttler 组件
  importConfigs: [join(__dirname, './config')],
})
export class ContainerLifeCycle {
  @App()
  app: koa.Application;

  async onReady() {
    //全局守卫配置
    this.app.useGuard(ThrottlerGuard);
  }
}

2. 配置相关参数

在 config.default.ts 配置文件中,配置如下

throttler: {
  ttl?: number,    //时间窗口,在该时间段内限制 limit 个数的请求, 超出限流
  limit?: number,   //请求个数限制
  storage?: IThrottlerStorageOption,    //内部存储配置,支持 memory | redis 两种存储方式
  errorMsg?: string,  //超出限流后的报错信息
}

针对某些 Controller 或者某些 Method, 支持

  1. 想覆盖全局配置,可以通过 Throttle 装饰器进行配置修改;
  2. 想要不限流,可以通过 SkipThrottle 装饰器放开限流
import { Controller, Get } from '@midwayjs/decorator';
import { SkipThrottle, Throttle } from 'midway-throttler';

@Throttle(2, 20) //重新配置
@Controller('/')
export class HomeController {
  @Throttle(1, 10) //重新配置
  @Get('/')
  async home(): Promise<string> {
    return 'Hello Midwayjs!';
  }

  @SkipThrottle(true) //该请求不限流
  @Get('/skip')
  async doSkip(): Promise<string> {
    return 'I am skip, no throttle';
  }
}

Example(例子)

  1. cd example
  2. npm i
  3. npm run dev