Golang 高性能UDP Server實現

經過Goroutine實現UDP消息併發處理

package main

import (
    "net"
    "fmt"
    "os"
)

// 限制goroutine數量
var limitChan = make(chan bool, 1000)


// UDP goroutine 實現併發讀取UDP數據
func udpProcess(conn *net.UDPConn) {

    // 最大讀取數據大小
    data := make([]byte, 1024)
    n, _, err := conn.ReadFromUDP(data)
    if err != nil {
        fmt.Println("failed read udp msg, error: " + err.Error())
    }
    str := string(data[:n])
    fmt.Println("receive from client, data:" + str)
    <- limitChan
}


func udpServer(address string) {
    udpAddr, err := net.ResolveUDPAddr("udp", address)
    conn, err := net.ListenUDP("udp", udpAddr)
    defer conn.Close()
    if err != nil {
        fmt.Println("read from connect failed, err:" + err.Error())
        os.Exit(1)
    }

    for {
        limitChan <- true
        go udpProcess(conn)
    }
}

func main() {
    address := "0.0.0.0:8080"
    udpServer(address)
}