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package main
import (
"crypto/tls"
"fmt"
"net"
"net/http"
"os"
"time"
"golang.org/x/net/http2"
)
type tlsHandlerFunc func(*tls.ClientHelloInfo) (*tls.Certificate, error)
type tcpKeepAliveListener struct {
*net.TCPListener
}
func (ln tcpKeepAliveListener) Accept() (c net.Conn, err error) {
tc, err := ln.AcceptTCP()
if err != nil {
return
}
tc.SetKeepAlive(true)
tc.SetKeepAlivePeriod(3 * time.Minute)
return tc, nil
}
func listenAndServe(fd uintptr, handler http.HandlerFunc, useHTTP2 bool, tlsConfig *tls.Config) error {
// create server
server := &http.Server{Handler: handler, TLSConfig: tlsConfig}
if useHTTP2 {
err := http2.ConfigureServer(server, &http2.Server{})
if err != nil {
return err
}
}
l, err := net.FileListener(os.NewFile(fd, "[socket]"))
if err != nil {
return fmt.Errorf("failed to listen on FD %d: %v", fd, err)
}
if tlsConfig != nil {
tlsListener := tls.NewListener(tcpKeepAliveListener{l.(*net.TCPListener)}, server.TLSConfig)
return server.Serve(tlsListener)
}
return server.Serve(&tcpKeepAliveListener{l.(*net.TCPListener)})
}
func listenAndServeTLS(fd uintptr, cert, key []byte, handler http.HandlerFunc, tlsHandler tlsHandlerFunc, useHTTP2 bool) error {
certificate, err := tls.X509KeyPair(cert, key)
if err != nil {
return err
}
tlsConfig := &tls.Config{}
tlsConfig.GetCertificate = tlsHandler
tlsConfig.Certificates = []tls.Certificate{
certificate,
}
return listenAndServe(fd, handler, useHTTP2, tlsConfig)
}
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