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mirror of https://github.com/v2fly/v2ray-core.git synced 2024-12-22 18:17:52 -05:00
v2fly/transport/internet/http/dialer.go
2018-09-18 23:09:54 +02:00

126 lines
3.1 KiB
Go

package http
import (
"context"
gotls "crypto/tls"
"net/http"
"net/url"
"sync"
"golang.org/x/net/http2"
"v2ray.com/core/common"
"v2ray.com/core/common/buf"
"v2ray.com/core/common/net"
"v2ray.com/core/transport/internet"
"v2ray.com/core/transport/internet/tls"
"v2ray.com/core/transport/pipe"
)
var (
globalDialerMap map[net.Destination]*http.Client
globalDailerAccess sync.Mutex
)
func getHTTPClient(ctx context.Context, dest net.Destination) (*http.Client, error) {
globalDailerAccess.Lock()
defer globalDailerAccess.Unlock()
if globalDialerMap == nil {
globalDialerMap = make(map[net.Destination]*http.Client)
}
if client, found := globalDialerMap[dest]; found {
return client, nil
}
config := tls.ConfigFromContext(ctx)
if config == nil {
return nil, newError("TLS must be enabled for http transport.").AtWarning()
}
transport := &http2.Transport{
DialTLS: func(network string, addr string, tlsConfig *gotls.Config) (net.Conn, error) {
rawHost, rawPort, err := net.SplitHostPort(addr)
if err != nil {
return nil, err
}
if len(rawPort) == 0 {
rawPort = "443"
}
port, err := net.PortFromString(rawPort)
if err != nil {
return nil, err
}
address := net.ParseAddress(rawHost)
pconn, err := internet.DialSystem(context.Background(), net.TCPDestination(address, port))
if err != nil {
return nil, err
}
return gotls.Client(pconn, tlsConfig), nil
},
TLSClientConfig: config.GetTLSConfig(tls.WithDestination(dest), tls.WithNextProto("h2")),
}
client := &http.Client{
Transport: transport,
}
globalDialerMap[dest] = client
return client, nil
}
// Dial dials a new TCP connection to the given destination.
func Dial(ctx context.Context, dest net.Destination) (internet.Connection, error) {
rawSettings := internet.StreamSettingsFromContext(ctx)
httpSettings, ok := rawSettings.ProtocolSettings.(*Config)
if !ok {
return nil, newError("HTTP config is not set.").AtError()
}
client, err := getHTTPClient(ctx, dest)
if err != nil {
return nil, err
}
opts := pipe.OptionsFromContext(ctx)
preader, pwriter := pipe.New(opts...)
breader := &buf.BufferedReader{Reader: preader}
request := &http.Request{
Method: "PUT",
Host: httpSettings.getRandomHost(),
Body: breader,
URL: &url.URL{
Scheme: "https",
Host: dest.NetAddr(),
Path: httpSettings.getNormalizedPath(),
},
Proto: "HTTP/2",
ProtoMajor: 2,
ProtoMinor: 0,
Header: make(http.Header),
}
// Disable any compression method from server.
request.Header.Set("Accept-Encoding", "identity")
response, err := client.Do(request)
if err != nil {
return nil, newError("failed to dial to ", dest).Base(err).AtWarning()
}
if response.StatusCode != 200 {
return nil, newError("unexpected status", response.StatusCode).AtWarning()
}
bwriter := buf.NewBufferedWriter(pwriter)
common.Must(bwriter.SetBuffered(false))
return net.NewConnection(
net.ConnectionOutput(response.Body),
net.ConnectionInput(bwriter),
net.ConnectionOnClose(common.NewChainedClosable(breader, bwriter, response.Body)),
), nil
}
func init() {
common.Must(internet.RegisterTransportDialer(protocolName, Dial))
}