1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
|
package http09
import (
"context"
"crypto/tls"
"errors"
"io"
"log"
"net"
"net/http"
"strings"
"sync"
"golang.org/x/net/idna"
"github.com/quic-go/quic-go"
)
// MethodGet0RTT allows a GET request to be sent using 0-RTT.
// Note that 0-RTT data doesn't provide replay protection.
const MethodGet0RTT = "GET_0RTT"
// RoundTripper performs HTTP/0.9 roundtrips over QUIC.
type RoundTripper struct {
mutex sync.Mutex
TLSClientConfig *tls.Config
QuicConfig *quic.Config
clients map[string]*client
}
var _ http.RoundTripper = &RoundTripper{}
// RoundTrip performs a HTTP/0.9 request.
// It only supports GET requests.
func (r *RoundTripper) RoundTrip(req *http.Request) (*http.Response, error) {
if req.Method != http.MethodGet && req.Method != MethodGet0RTT {
return nil, errors.New("only GET requests supported")
}
log.Printf("Requesting %s.\n", req.URL)
r.mutex.Lock()
hostname := authorityAddr("https", hostnameFromRequest(req))
if r.clients == nil {
r.clients = make(map[string]*client)
}
c, ok := r.clients[hostname]
if !ok {
tlsConf := &tls.Config{}
if r.TLSClientConfig != nil {
tlsConf = r.TLSClientConfig.Clone()
}
tlsConf.NextProtos = []string{NextProto}
c = &client{
hostname: hostname,
tlsConf: tlsConf,
quicConf: r.QuicConfig,
}
r.clients[hostname] = c
}
r.mutex.Unlock()
return c.RoundTrip(req)
}
// Close closes the roundtripper.
func (r *RoundTripper) Close() error {
r.mutex.Lock()
defer r.mutex.Unlock()
for id, c := range r.clients {
if err := c.Close(); err != nil {
return err
}
delete(r.clients, id)
}
return nil
}
type client struct {
hostname string
tlsConf *tls.Config
quicConf *quic.Config
once sync.Once
conn *quic.Conn
dialErr error
}
func (c *client) RoundTrip(req *http.Request) (*http.Response, error) {
c.once.Do(func() {
c.conn, c.dialErr = quic.DialAddrEarly(context.Background(), c.hostname, c.tlsConf, c.quicConf)
})
if c.dialErr != nil {
return nil, c.dialErr
}
if req.Method != MethodGet0RTT {
<-c.conn.HandshakeComplete()
}
return c.doRequest(req)
}
func (c *client) doRequest(req *http.Request) (*http.Response, error) {
str, err := c.conn.OpenStreamSync(context.Background())
if err != nil {
return nil, err
}
cmd := "GET " + req.URL.Path + "\r\n"
if _, err := str.Write([]byte(cmd)); err != nil {
return nil, err
}
if err := str.Close(); err != nil {
return nil, err
}
rsp := &http.Response{
Proto: "HTTP/0.9",
ProtoMajor: 0,
ProtoMinor: 9,
Request: req,
Body: io.NopCloser(str),
}
return rsp, nil
}
func (c *client) Close() error {
if c.conn == nil {
return nil
}
return c.conn.CloseWithError(0, "")
}
func hostnameFromRequest(req *http.Request) string {
if req.URL != nil {
return req.URL.Host
}
return ""
}
// authorityAddr returns a given authority (a host/IP, or host:port / ip:port)
// and returns a host:port. The port 443 is added if needed.
func authorityAddr(scheme string, authority string) (addr string) {
host, port, err := net.SplitHostPort(authority)
if err != nil { // authority didn't have a port
port = "443"
if scheme == "http" {
port = "80"
}
host = authority
}
if a, err := idna.ToASCII(host); err == nil {
host = a
}
// IPv6 address literal, without a port:
if strings.HasPrefix(host, "[") && strings.HasSuffix(host, "]") {
return host + ":" + port
}
return net.JoinHostPort(host, port)
}
|
