rate2

express/koa 限流器

Install

$ npm i -S rate2

Usages

express

const express = require('express')
const app = express();

var rate = require('rate2')(require('./config'))

var i = 0

app.get('/', rate.express, function (req, res) {
    i++
    res.json({ count: i });
});

app.listen(3000)

koa 2

const Koa = require('koa');
const app = new Koa();

var rate = require('.')(require('./config'))
var i = 0
app.use(rate.koa)

app.use(function (ctx, next) {
    i++
    console.log({ count: i })
    return ctx.body = { count: i };
});

app.listen(3000)

配置项

{
    "key": "rate_list7",
    "count": 10,
    "conn": [
      {
        "port": 6379,
        "host": "127.0.0.1",
        "family": 4,
        "password": "",
        "db": 0
      },
      {
        "port": 6378,
        "host": "127.0.0.1",
        "family": 4,
        "password": "",
        "db": 0
      }
    ],
    "redirect_url": "https://www.baidu.com/"
  }

Api

• 初始化参数是json配置项

var rate = require('rate2')(require('./config'))

• 开启限流

rate.enable()

• 关闭限流

rate.disable('https://cnodejs.org/')

• 制造数据

rate.makeData()

• express中间件

app.get('/', rate.middleware, function (req, res) {
    i++
    res.json({ count: i });
});

测试

1）准备

redis-server --port 6378
redis-server --port 6379

2）增加redis里的数据

默认按照当前目录的config.js，向2台redis服务器里增加10条数据，每个服务器5条

$ npm run disable 
$ npm run enable
$ npm run data

3）启动express服务器

$ node app

此时访问 http://127.0.0.1:3000 地址，头10次是正常访问，之后的都会被重定向。

redis基础操作

var Redis = require('ioredis');

var redis = new Redis();

// redis.lpush('list', [1,2,3,4,5,6])

// redis.lrange('list', 0 , 100)

// redis.blpop('list', 100).then(function(a){
//     console.log(a)
// })

redis.mset('enable',1, 'url','https://cnodejs.org/')


redis.mget('enable','url').then(function(a) {
    console.log(a)
})

TODO

如果需要，可以使用msgpack5序列化，来存储config，效果更好

Contributing

1. Fork it
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create new Pull Request

版本历史

• v1.0.0 初始化版本cli

欢迎fork和反馈

• write by i5ting [email protected]

如有建议或意见，请在issue提问或邮件

License

this repo is released under the MIT License.