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