forked from SlyMarbo/spdy
/
server.go
268 lines (239 loc) · 6.71 KB
/
server.go
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// Copyright 2013 Jamie Hall. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package spdy
import (
"crypto/tls"
"errors"
"net"
"net/http"
"time"
"github.com/SlyMarbo/spdy/common"
"github.com/SlyMarbo/spdy/spdy2"
"github.com/SlyMarbo/spdy/spdy3"
)
// NewServerConn is used to create a SPDY connection, using the given
// net.Conn for the underlying connection, and the given http.Server to
// configure the request serving.
func NewServerConn(conn net.Conn, server *http.Server, version, subversion int) (common.Conn, error) {
if conn == nil {
return nil, errors.New("Error: Connection initialised with nil net.conn.")
}
if server == nil {
return nil, errors.New("Error: Connection initialised with nil server.")
}
switch version {
case 3:
return spdy3.NewConn(conn, server, subversion), nil
case 2:
return spdy2.NewConn(conn, server), nil
default:
return nil, errors.New("Error: Unsupported SPDY version.")
}
}
// ListenAndServeTLS listens on the TCP network address addr
// and then calls Serve with handler to handle requests on
// incoming connections. Handler is typically nil, in which
// case the DefaultServeMux is used. Additionally, files
// containing a certificate and matching private key for the
// server must be provided. If the certificate is signed by
// a certificate authority, the certFile should be the
// concatenation of the server's certificate followed by the
// CA's certificate.
//
// See examples/server/server.go for a simple example server.
func ListenAndServeTLS(addr string, certFile string, keyFile string, handler http.Handler) error {
npnStrings := npn()
server := &http.Server{
Addr: addr,
Handler: handler,
TLSConfig: &tls.Config{
NextProtos: npnStrings,
},
TLSNextProto: make(map[string]func(*http.Server, *tls.Conn, http.Handler)),
}
for _, str := range npnStrings {
switch str {
case "spdy/2":
server.TLSNextProto[str] = spdy2.NextProto
case "spdy/3":
server.TLSNextProto[str] = spdy3.NextProto
case "spdy/3.1":
server.TLSNextProto[str] = spdy3.NextProto1
}
}
return server.ListenAndServeTLS(certFile, keyFile)
}
// ListenAndServeSpdyOnly listens on the TCP network address addr
// and then calls Serve with handler to handle requests on
// incoming connections. Handler is typically nil, in which
// case the DefaultServeMux is used. Additionally, files
// containing a certificate and matching private key for the
// server must be provided. If the certificate is signed by
// a certificate authority, the certFile should be the
// concatenation of the server's certificate followed by the
// CA's certificate.
//
// IMPORTANT NOTE: Unlike spdy.ListenAndServeTLS, this function
// will ONLY serve SPDY. HTTPS requests are refused.
//
// See examples/spdy_only_server/server.go for a simple example server.
func ListenAndServeSpdyOnly(addr string, certFile string, keyFile string, handler http.Handler) error {
npnStrings := npn()
if addr == "" {
addr = ":https"
}
if handler == nil {
handler = http.DefaultServeMux
}
server := &http.Server{
Addr: addr,
Handler: handler,
TLSConfig: &tls.Config{
NextProtos: npnStrings,
Certificates: make([]tls.Certificate, 1),
},
TLSNextProto: make(map[string]func(*http.Server, *tls.Conn, http.Handler)),
}
for _, str := range npnStrings {
switch str {
case "spdy/2":
server.TLSNextProto[str] = spdy2.NextProto
case "spdy/3":
server.TLSNextProto[str] = spdy3.NextProto
case "spdy/3.1":
server.TLSNextProto[str] = spdy3.NextProto1
}
}
var err error
server.TLSConfig.Certificates[0], err = tls.LoadX509KeyPair(certFile, keyFile)
if err != nil {
return err
}
conn, err := net.Listen("tcp", addr)
if err != nil {
return err
}
tlsListener := tls.NewListener(conn, server.TLSConfig)
defer tlsListener.Close()
// Main loop
var tempDelay time.Duration
for {
rw, e := tlsListener.Accept()
if e != nil {
if ne, ok := e.(net.Error); ok && ne.Temporary() {
if tempDelay == 0 {
tempDelay = 5 * time.Millisecond
} else {
tempDelay *= 2
}
if max := 1 * time.Second; tempDelay > max {
tempDelay = max
}
log.Printf("Accept error: %v; retrying in %v", e, tempDelay)
time.Sleep(tempDelay)
continue
}
return e
}
tempDelay = 0
go serveSPDY(rw, server)
}
}
// ListenAndServeSPDYNoNPN creates a server that listens exclusively
// for SPDY and (unlike the rest of the package) will not support
// HTTPS.
func ListenAndServeSPDYNoNPN(addr string, certFile string, keyFile string, handler http.Handler, version, subversion int) error {
if addr == "" {
addr = ":https"
}
if handler == nil {
handler = http.DefaultServeMux
}
server := &http.Server{
Addr: addr,
Handler: handler,
TLSConfig: &tls.Config{
Certificates: make([]tls.Certificate, 1),
},
}
var err error
server.TLSConfig.Certificates[0], err = tls.LoadX509KeyPair(certFile, keyFile)
if err != nil {
return err
}
conn, err := net.Listen("tcp", addr)
if err != nil {
return err
}
tlsListener := tls.NewListener(conn, server.TLSConfig)
defer tlsListener.Close()
// Main loop
var tempDelay time.Duration
for {
rw, e := tlsListener.Accept()
if e != nil {
if ne, ok := e.(net.Error); ok && ne.Temporary() {
if tempDelay == 0 {
tempDelay = 5 * time.Millisecond
} else {
tempDelay *= 2
}
if max := 1 * time.Second; tempDelay > max {
tempDelay = max
}
log.Printf("Accept error: %v; retrying in %v", e, tempDelay)
time.Sleep(tempDelay)
continue
}
return e
}
tempDelay = 0
go serveSPDYNoNPN(rw, server, version, subversion)
}
}
func serveSPDY(conn net.Conn, srv *http.Server) {
defer common.Recover()
tlsConn, ok := conn.(*tls.Conn)
if !ok { // Only allow TLS connections.
return
}
if d := srv.ReadTimeout; d != 0 {
conn.SetReadDeadline(time.Now().Add(d))
}
if d := srv.WriteTimeout; d != 0 {
conn.SetWriteDeadline(time.Now().Add(d))
}
if err := tlsConn.Handshake(); err != nil {
return
}
tlsState := new(tls.ConnectionState)
*tlsState = tlsConn.ConnectionState()
proto := tlsState.NegotiatedProtocol
if fn := srv.TLSNextProto[proto]; fn != nil {
fn(srv, tlsConn, nil)
}
return
}
func serveSPDYNoNPN(conn net.Conn, srv *http.Server, version, subversion int) {
defer common.Recover()
tlsConn, ok := conn.(*tls.Conn)
if !ok { // Only allow TLS connections.
return
}
if d := srv.ReadTimeout; d != 0 {
conn.SetReadDeadline(time.Now().Add(d))
}
if d := srv.WriteTimeout; d != 0 {
conn.SetWriteDeadline(time.Now().Add(d))
}
if err := tlsConn.Handshake(); err != nil {
return
}
serverConn, err := NewServerConn(tlsConn, srv, version, subversion)
if err != nil {
log.Println(err)
return
}
serverConn.Run()
}