forked from libp2p/go-libp2p
-
Notifications
You must be signed in to change notification settings - Fork 0
/
websocket.go
155 lines (131 loc) · 3.89 KB
/
websocket.go
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
// Package websocket implements a websocket based transport for go-libp2p.
package websocket
import (
"context"
"crypto/tls"
"net/http"
"time"
"github.com/libp2p/go-libp2p-core/network"
"github.com/libp2p/go-libp2p-core/peer"
"github.com/libp2p/go-libp2p-core/transport"
ma "github.com/multiformats/go-multiaddr"
mafmt "github.com/multiformats/go-multiaddr-fmt"
manet "github.com/multiformats/go-multiaddr/net"
ws "github.com/gorilla/websocket"
)
// WsFmt is multiaddr formatter for WsProtocol
var WsFmt = mafmt.And(mafmt.TCP, mafmt.Base(ma.P_WS))
// This is _not_ WsFmt because we want the transport to stick to dialing fully
// resolved addresses.
var dialMatcher = mafmt.And(mafmt.Or(mafmt.IP, mafmt.DNS), mafmt.Base(ma.P_TCP), mafmt.Or(mafmt.Base(ma.P_WS), mafmt.Base(ma.P_WSS)))
func init() {
manet.RegisterFromNetAddr(ParseWebsocketNetAddr, "websocket")
manet.RegisterToNetAddr(ConvertWebsocketMultiaddrToNetAddr, "ws")
manet.RegisterToNetAddr(ConvertWebsocketMultiaddrToNetAddr, "wss")
}
// Default gorilla upgrader
var upgrader = ws.Upgrader{
// Allow requests from *all* origins.
CheckOrigin: func(r *http.Request) bool {
return true
},
}
type Option func(*WebsocketTransport) error
// WithTLSClientConfig sets a TLS client configuration on the WebSocket Dialer. Only
// relevant for non-browser usages.
//
// Some useful use cases include setting InsecureSkipVerify to `true`, or
// setting user-defined trusted CA certificates.
func WithTLSClientConfig(c *tls.Config) Option {
return func(t *WebsocketTransport) error {
t.tlsClientConf = c
return nil
}
}
// WithTLSConfig sets a TLS configuration for the WebSocket listener.
func WithTLSConfig(conf *tls.Config) Option {
return func(t *WebsocketTransport) error {
t.tlsConf = conf
return nil
}
}
// WebsocketTransport is the actual go-libp2p transport
type WebsocketTransport struct {
upgrader transport.Upgrader
rcmgr network.ResourceManager
tlsClientConf *tls.Config
tlsConf *tls.Config
}
var _ transport.Transport = (*WebsocketTransport)(nil)
func New(u transport.Upgrader, rcmgr network.ResourceManager, opts ...Option) (*WebsocketTransport, error) {
if rcmgr == nil {
rcmgr = network.NullResourceManager
}
t := &WebsocketTransport{
upgrader: u,
rcmgr: rcmgr,
}
for _, opt := range opts {
if err := opt(t); err != nil {
return nil, err
}
}
return t, nil
}
func (t *WebsocketTransport) CanDial(a ma.Multiaddr) bool {
return dialMatcher.Matches(a)
}
func (t *WebsocketTransport) Protocols() []int {
return []int{ma.P_WS, ma.P_WSS}
}
func (t *WebsocketTransport) Proxy() bool {
return false
}
func (t *WebsocketTransport) Dial(ctx context.Context, raddr ma.Multiaddr, p peer.ID) (transport.CapableConn, error) {
connScope, err := t.rcmgr.OpenConnection(network.DirOutbound, true)
if err != nil {
return nil, err
}
macon, err := t.maDial(ctx, raddr)
if err != nil {
connScope.Done()
return nil, err
}
return t.upgrader.Upgrade(ctx, t, macon, network.DirOutbound, p, connScope)
}
func (t *WebsocketTransport) maDial(ctx context.Context, raddr ma.Multiaddr) (manet.Conn, error) {
wsurl, err := parseMultiaddr(raddr)
if err != nil {
return nil, err
}
isWss := wsurl.Scheme == "wss"
dialer := ws.Dialer{HandshakeTimeout: 30 * time.Second}
if isWss {
dialer.TLSClientConfig = t.tlsClientConf
}
wscon, _, err := dialer.DialContext(ctx, wsurl.String(), nil)
if err != nil {
return nil, err
}
mnc, err := manet.WrapNetConn(NewConn(wscon, isWss))
if err != nil {
wscon.Close()
return nil, err
}
return mnc, nil
}
func (t *WebsocketTransport) maListen(a ma.Multiaddr) (manet.Listener, error) {
l, err := newListener(a, t.tlsConf)
if err != nil {
return nil, err
}
go l.serve()
return l, nil
}
func (t *WebsocketTransport) Listen(a ma.Multiaddr) (transport.Listener, error) {
malist, err := t.maListen(a)
if err != nil {
return nil, err
}
return t.upgrader.UpgradeListener(t, malist), nil
}