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main.go
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main.go
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// Copyright (c) 2024 Gang Chen
package main
import (
"context"
"flag"
"fmt"
"log"
"os"
"os/signal"
"syscall"
)
var (
mcastIface string
)
func main() {
log.SetFlags(0) // remove all flags
var httpAddr string
var httpPort int
flag.StringVar(&mcastIface, "m", "", "multicast interface")
flag.StringVar(&httpAddr, "a", "127.0.0.1", "HTTP listen address")
flag.IntVar(&httpPort, "p", 4022, "HTTP listen port")
flag.Parse()
if mcastIface == "" {
log.Println("Missing required parameter: -m <interface>")
flag.Usage()
return
}
if httpPort <= 0 {
log.Println("Missing or invalid required parameter: -p <port>")
flag.Usage()
return
}
sigCh := make(chan os.Signal, 1)
signal.Notify(sigCh, syscall.SIGINT, syscall.SIGQUIT)
ctx := context.Background()
go func() {
<-sigCh // receive signal
webServer.Shutdown(ctx)
}()
runHttpServer(fmt.Sprintf("%s:%d", httpAddr, httpPort))
}