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package main
import (
"crypto/tls"
"fmt"
"net"
"net/http"
"os"
"time"
"github.com/gorilla/context"
"golang.org/x/net/http2"
"gitlab.com/gitlab-org/gitlab-pages/internal/netutil"
)
type tlsHandlerFunc func(*tls.ClientHelloInfo) (*tls.Certificate, error)
type keepAliveListener struct {
net.Listener
}
type keepAliveSetter interface {
SetKeepAlive(bool) error
SetKeepAlivePeriod(time.Duration) error
}
func (ln *keepAliveListener) Accept() (net.Conn, error) {
conn, err := ln.Listener.Accept()
if err != nil {
return nil, err
}
kc := conn.(keepAliveSetter)
kc.SetKeepAlive(true)
kc.SetKeepAlivePeriod(3 * time.Minute)
return conn, nil
}
func listenAndServe(fd uintptr, handler http.HandlerFunc, useHTTP2 bool, tlsConfig *tls.Config, limiter *netutil.Limiter) error {
// create server
server := &http.Server{Handler: context.ClearHandler(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 limiter != nil {
l = netutil.SharedLimitListener(l, limiter)
}
if tlsConfig != nil {
tlsListener := tls.NewListener(&keepAliveListener{l}, server.TLSConfig)
return server.Serve(tlsListener)
}
return server.Serve(&keepAliveListener{l})
}
func listenAndServeTLS(fd uintptr, cert, key []byte, handler http.HandlerFunc, tlsHandler tlsHandlerFunc, useHTTP2 bool, limiter *netutil.Limiter) 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, limiter)
}
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