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// Copyright 2016 The CMux Authors. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
// implied. See the License for the specific language governing
// permissions and limitations under the License.
package cmux_test
import (
"crypto/rand"
"crypto/tls"
"fmt"
"log"
"net"
"net/http"
"net/rpc"
"strings"
"github.com/soheilhy/cmux"
)
type recursiveHTTPHandler struct{}
func (h *recursiveHTTPHandler) ServeHTTP(w http.ResponseWriter,
r *http.Request) {
fmt.Fprintf(w, "example http response")
}
func recursiveServeHTTP(l net.Listener) {
s := &http.Server{
Handler: &recursiveHTTPHandler{},
}
if err := s.Serve(l); err != cmux.ErrListenerClosed {
panic(err)
}
}
func tlsListener(l net.Listener) net.Listener {
// Load certificates.
certificate, err := tls.LoadX509KeyPair("cert.pem", "key.pem")
if err != nil {
log.Panic(err)
}
config := &tls.Config{
Certificates: []tls.Certificate{certificate},
Rand: rand.Reader,
}
// Create TLS listener.
tlsl := tls.NewListener(l, config)
return tlsl
}
type RecursiveRPCRcvr struct{}
func (r *RecursiveRPCRcvr) Cube(i int, j *int) error {
*j = i * i
return nil
}
func recursiveServeRPC(l net.Listener) {
s := rpc.NewServer()
if err := s.Register(&RecursiveRPCRcvr{}); err != nil {
panic(err)
}
for {
conn, err := l.Accept()
if err != nil {
if err != cmux.ErrListenerClosed {
panic(err)
}
return
}
go s.ServeConn(conn)
}
}
// This is an example for serving HTTP, HTTPS, and GoRPC/TLS on the same port.
func Example_recursiveCmux() {
// Create the TCP listener.
l, err := net.Listen("tcp", "127.0.0.1:50051")
if err != nil {
log.Panic(err)
}
// Create a mux.
tcpm := cmux.New(l)
// We first match on HTTP 1.1 methods.
httpl := tcpm.Match(cmux.HTTP1Fast())
// If not matched, we assume that its TLS.
tlsl := tcpm.Match(cmux.Any())
tlsl = tlsListener(tlsl)
// Now, we build another mux recursively to match HTTPS and GoRPC.
// You can use the same trick for SSH.
tlsm := cmux.New(tlsl)
httpsl := tlsm.Match(cmux.HTTP1Fast())
gorpcl := tlsm.Match(cmux.Any())
go recursiveServeHTTP(httpl)
go recursiveServeHTTP(httpsl)
go recursiveServeRPC(gorpcl)
go func() {
if err := tlsm.Serve(); err != cmux.ErrListenerClosed {
panic(err)
}
}()
if err := tcpm.Serve(); !strings.Contains(err.Error(), "use of closed network connection") {
panic(err)
}
}
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