golang简易令牌桶算法实现

基本思路：定义一个chan，chan大小为需要限制的qps大小，go一个协程启动tick，每1000/qps时间在tick中写入数值，启动另一个协程，读取chan中的值，如果读取到chan中有值，则向下层接口发送请求。

代码如下：

package main

import (
    "fmt"
    "time"
    "httpclient"
)

var LEN int = 10

func tickStoreCh(arrlen int, ch chan int) {
    len := 1000/arrlen
    fmt.Println(len)
    tickTime := time.NewTicker(time.Duration(len)*time.Millisecond)
    var i int
    for {
        fmt.Println(len)
        i++
        <-tickTime.C
        ch<- i
    }
}

func OrganReq(org string, qps int) {
    ch := make(chan int, qps)
    go tickStoreCh(qps, ch)
    time.Sleep(1000*time.Millisecond)
    for {
        //收客户请求，发送http请求给RE
        client := httpclient.NewHttpClient(time.Duration(1000)*time.Millisecond, time.Duration(2000)*time.Millisecond)
        header := make(map[string]string)
        header["Content-Type"] = "application/json;charset=utf-8"
        code, err := client.ResponseCode("http://127.0.0.1:19988", header, "llltest")
        value := <- ch
        fmt.Println(code, value, err, "lenchan:", len(ch))
        //time.Sleep(time.Second)
    }
}