英文:
Create multiple UDP servers using golang
问题
我有一个端口列表，需要创建一个UDP服务器。我尝试了以下方法：
for _, r := range routingTable.Routes {
if r.Metric == 0 {
wg.Add(1)
go func() {
conn, err := net.ListenUDP("udp4", &r.OriginPort)
if err != nil {
log.Fatalf("启动服务器时出错：%s", err)
} else {
log.Printf("监听端口：%s", r.OriginPort.String())
}
defer conn.Close()
buffer := make([]byte, 1024)
for {
conn.ReadFromUDP(buffer)
}
}()
wg.Wait()
}
}
但是它没有起作用。我该怎么做才能使其工作？
英文:
I have a list of ports that I need to create a UDP server. I have tried this aproach
for _, r := range routingTable.Routes {
if r.Metric == 0 {
wg.Add(1)
go func() {
conn, err := net.ListenUDP("udp4", &r.OriginPort)
if err != nil {
log.Fatalf("Error occured starting the server: %s", err)
} else {
log.Printf("Listening on port: %s", r.OriginPort.String())
}
defer conn.Close()
buffer := make([]byte, 1024)
for {
conn.ReadFromUDP(buffer)
}
}()
wg.Wait()
}
}
but it is not working. What can I do to make it work ?
答案1
得分: 0
- 如@CeriseLimon所指出的：不要让每次迭代都阻塞goroutine，在循环外移动
wg.Wait()。 - 不要忘记在每个goroutine内调用
wg.Done()：在每个函数中添加defer wg.Done()的调用。
（由于您的监听goroutine永远不会返回，第二点有点理论性...显然，添加一些代码使您的监听goroutine执行某些操作，并在可能的情况下正常退出）
英文:
- as noted by @CeriseLimon : don't make the goroutine block on each iteration, move
wg.Wait()outside of the loop - don't forget to call
wg.Done()from within each goroutine : add a call todefer wg.Done()in each function
(since your listening goroutines never return, the second point is a bit theoretical ... obviously, add some code to have your listening goroutines do something, and exit cleanly if possible)
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