alpn_test.go

     1  // Copyright 2013 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  package http_test
     6  
     7  import (
     8  	"bufio"
     9  	"bytes"
    10  	"crypto/tls"
    11  	"crypto/x509"
    12  	"fmt"
    13  	"io"
    14  	. "net/http"
    15  	"net/http/httptest"
    16  	"strings"
    17  	"testing"
    18  )
    19  
    20  func TestNextProtoUpgrade(t *testing.T) {
    21  	setParallel(t)
    22  	defer afterTest(t)
    23  	ts := httptest.NewUnstartedServer(HandlerFunc(func(w ResponseWriter, r *Request) {
    24  		fmt.Fprintf(w, "path=%s,proto=", r.URL.Path)
    25  		if r.TLS != nil {
    26  			w.Write([]byte(r.TLS.NegotiatedProtocol))
    27  		}
    28  		if r.RemoteAddr == "" {
    29  			t.Error("request with no RemoteAddr")
    30  		}
    31  		if r.Body == nil {
    32  			t.Errorf("request with nil Body")
    33  		}
    34  	}))
    35  	ts.TLS = &tls.Config{
    36  		NextProtos: []string{"unhandled-proto", "tls-0.9"},
    37  	}
    38  	ts.Config.TLSNextProto = map[string]func(*Server, *tls.Conn, Handler){
    39  		"tls-0.9": handleTLSProtocol09,
    40  	}
    41  	ts.StartTLS()
    42  	defer ts.Close()
    43  
    44  	// Normal request, without NPN.
    45  	{
    46  		c := ts.Client()
    47  		res, err := c.Get(ts.URL)
    48  		if err != nil {
    49  			t.Fatal(err)
    50  		}
    51  		body, err := io.ReadAll(res.Body)
    52  		if err != nil {
    53  			t.Fatal(err)
    54  		}
    55  		if want := "path=/,proto="; string(body) != want {
    56  			t.Errorf("plain request = %q; want %q", body, want)
    57  		}
    58  	}
    59  
    60  	// Request to an advertised but unhandled NPN protocol.
    61  	// Server will hang up.
    62  	{
    63  		certPool := x509.NewCertPool()
    64  		certPool.AddCert(ts.Certificate())
    65  		tr := &Transport{
    66  			TLSClientConfig: &tls.Config{
    67  				RootCAs:    certPool,
    68  				NextProtos: []string{"unhandled-proto"},
    69  			},
    70  		}
    71  		defer tr.CloseIdleConnections()
    72  		c := &Client{
    73  			Transport: tr,
    74  		}
    75  		res, err := c.Get(ts.URL)
    76  		if err == nil {
    77  			defer res.Body.Close()
    78  			var buf bytes.Buffer
    79  			res.Write(&buf)
    80  			t.Errorf("expected error on unhandled-proto request; got: %s", buf.Bytes())
    81  		}
    82  	}
    83  
    84  	// Request using the "tls-0.9" protocol, which we register here.
    85  	// It is HTTP/0.9 over TLS.
    86  	{
    87  		c := ts.Client()
    88  		tlsConfig := c.Transport.(*Transport).TLSClientConfig
    89  		tlsConfig.NextProtos = []string{"tls-0.9"}
    90  		conn, err := tls.Dial("tcp", ts.Listener.Addr().String(), tlsConfig)
    91  		if err != nil {
    92  			t.Fatal(err)
    93  		}
    94  		conn.Write([]byte("GET /foo\n"))
    95  		body, err := io.ReadAll(conn)
    96  		if err != nil {
    97  			t.Fatal(err)
    98  		}
    99  		if want := "path=/foo,proto=tls-0.9"; string(body) != want {
   100  			t.Errorf("plain request = %q; want %q", body, want)
   101  		}
   102  	}
   103  }
   104  
   105  // handleTLSProtocol09 implements the HTTP/0.9 protocol over TLS, for the
   106  // TestNextProtoUpgrade test.
   107  func handleTLSProtocol09(srv *Server, conn *tls.Conn, h Handler) {
   108  	br := bufio.NewReader(conn)
   109  	line, err := br.ReadString('\n')
   110  	if err != nil {
   111  		return
   112  	}
   113  	line = strings.TrimSpace(line)
   114  	path := strings.TrimPrefix(line, "GET ")
   115  	if path == line {
   116  		return
   117  	}
   118  	req, _ := NewRequest("GET", path, nil)
   119  	req.Proto = "HTTP/0.9"
   120  	req.ProtoMajor = 0
   121  	req.ProtoMinor = 9
   122  	rw := &http09Writer{conn, make(Header)}
   123  	h.ServeHTTP(rw, req)
   124  }
   125  
   126  type http09Writer struct {
   127  	io.Writer
   128  	h Header
   129  }
   130  
   131  func (w http09Writer) Header() Header  { return w.h }
   132  func (w http09Writer) WriteHeader(int) {} // no headers
   133
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