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mirror of https://github.com/v2fly/v2ray-core.git synced 2024-12-23 02:26:49 -05:00
v2fly/transport/internet/websocket/dialer.go
2017-01-27 13:50:38 +01:00

100 lines
2.6 KiB
Go

package websocket
import (
"context"
"io/ioutil"
"net"
"github.com/gorilla/websocket"
"v2ray.com/core/common"
"v2ray.com/core/common/log"
v2net "v2ray.com/core/common/net"
"v2ray.com/core/transport/internet"
"v2ray.com/core/transport/internet/internal"
v2tls "v2ray.com/core/transport/internet/tls"
)
var (
globalCache = internal.NewConnectionPool()
)
func Dial(ctx context.Context, dest v2net.Destination) (internet.Connection, error) {
log.Info("WebSocket|Dialer: Creating connection to ", dest)
src := internet.DialerSourceFromContext(ctx)
wsSettings := internet.TransportSettingsFromContext(ctx).(*Config)
id := internal.NewConnectionID(src, dest)
var conn *wsconn
if dest.Network == v2net.Network_TCP && wsSettings.IsConnectionReuse() {
connt := globalCache.Get(id)
if connt != nil {
conn = connt.(*wsconn)
}
}
if conn == nil {
var err error
conn, err = wsDial(ctx, dest)
if err != nil {
log.Warning("WebSocket|Dialer: Dial failed: ", err)
return nil, err
}
}
return internal.NewConnection(id, conn, globalCache, internal.ReuseConnection(wsSettings.IsConnectionReuse())), nil
}
func init() {
common.Must(internet.RegisterTransportDialer(internet.TransportProtocol_WebSocket, Dial))
}
func wsDial(ctx context.Context, dest v2net.Destination) (*wsconn, error) {
src := internet.DialerSourceFromContext(ctx)
wsSettings := internet.TransportSettingsFromContext(ctx).(*Config)
commonDial := func(network, addr string) (net.Conn, error) {
return internet.DialSystem(src, dest)
}
dialer := websocket.Dialer{
NetDial: commonDial,
ReadBufferSize: 32 * 1024,
WriteBufferSize: 32 * 1024,
}
protocol := "ws"
if securitySettings := internet.SecuritySettingsFromContext(ctx); securitySettings != nil {
tlsConfig, ok := securitySettings.(*v2tls.Config)
if ok {
protocol = "wss"
dialer.TLSClientConfig = tlsConfig.GetTLSConfig()
if dest.Address.Family().IsDomain() {
dialer.TLSClientConfig.ServerName = dest.Address.Domain()
}
}
}
host := dest.NetAddr()
if (protocol == "ws" && dest.Port == 80) || (protocol == "wss" && dest.Port == 443) {
host = dest.Address.String()
}
uri := protocol + "://" + host + "/" + wsSettings.Path
conn, resp, err := dialer.Dial(uri, nil)
if err != nil {
if resp != nil {
reason, reasonerr := ioutil.ReadAll(resp.Body)
log.Info(string(reason), reasonerr)
}
return nil, err
}
return func() internet.Connection {
connv2ray := &wsconn{
wsc: conn,
connClosing: false,
config: wsSettings,
}
connv2ray.setup()
return connv2ray
}().(*wsconn), nil
}