100行不到，運行一個最簡單的TURN服務器。

源碼

package mainimport ("fmt""github.com/pion/turn/v2""log""net""net/http""strconv" )var turnServer *turn.Serverfunc startTurn(publicIP string, listenPort int, realm string, username string, password string) {udpListener, err := net.ListenPacket("udp4", "0.0.0.0:"+strconv.Itoa(listenPort))if err != nil {log.Panicf("Failed to create TURN server listener: %s", err)}usersMap := map[string][]byte{}usersMap[username] = turn.GenerateAuthKey(username, realm, password)turnServer, err = turn.NewServer(turn.ServerConfig{Realm: realm,// Set AuthHandler callback// This is called everytime a user tries to authenticate with the TURN server// Return the key for that user, or false when no user is foundAuthHandler: func(username string, realm string, srcAddr net.Addr) ([]byte, bool) {fmt.Printf("Received connect auth, username=%s, realm=%s\n", username, realm)// framework will check auth keyif key, ok := usersMap[username]; ok {return key, true}return nil, false},// PacketConnConfigs is a list of UDP Listeners and the configuration around themPacketConnConfigs: []turn.PacketConnConfig{{PacketConn: udpListener,RelayAddressGenerator: &turn.RelayAddressGeneratorStatic{RelayAddress: net.ParseIP(publicIP), // Claim that we are listening on IP passed by user (This should be your Public IP)Address: "0.0.0.0", // But actually be listening on every interface},},},})fmt.Printf("turn server public ip=%s, listen port=%d, realm=%s, username=%s, password=%s\n",publicIP, listenPort, realm, username, password)if err != nil {log.Panic(err)} }func main() {var listenAddress stringlistenAddress = "0.0.0.0:8080"http.Handle("/", http.FileServer(http.Dir(".")))fmt.Printf("HTTP server listen on http://%s\n", listenAddress)startTurn("127.0.0.1", 13902, "localhost", "foo", "bar")panic(http.ListenAndServe(listenAddress, nil)) }

測試客戶端

參考：
https://blog.csdn.net/pengjian444/article/details/122401335

本文借助了pion/turn實現

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