package main
import (
"crypto/tls"
"net/http"
"time"
"log"
)
func myHandler(w http.ResponseWriter, r *http.Request) {
w.Write([]byte("tls"))
}
func main() {
t := log.Logger{}
var err error
tlsConfig := &tls.Config{}
tlsConfig.Certificates = make([]tls.Certificate, 3)
// go http server treats the 0'th key as a default fallback key
tlsConfig.Certificates[0], err = tls.LoadX509KeyPair("test0.pem", "key.pem")
if err != nil {
t.Fatal(err)
}
tlsConfig.Certificates[1], err = tls.LoadX509KeyPair("test1.pem", "key.pem")
if err != nil {
t.Fatal(err)
}
tlsConfig.Certificates[2], err = tls.LoadX509KeyPair("test2.pem", "key.pem")
if err != nil {
t.Fatal(err)
}
// as of go 1.14 this line is no longer needed
// load the certs as above and skip BuildNameToCertificate()
tlsConfig.BuildNameToCertificate()
http.HandleFunc("/", myHandler)
server := &http.Server{
ReadTimeout:    10 * time.Second,
WriteTimeout:   10 * time.Second,
MaxHeaderBytes: 1 << 20,
TLSConfig:      tlsConfig,
}
listener, err := tls.Listen("tcp", ":8443", tlsConfig)
if err != nil {
t.Fatal(err)
}
log.Fatal(server.Serve(listener))
}