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// +build !confonly
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, tlsSettings *tls.Config) (*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
}
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), nil)
if err != nil {
return nil, err
}
return gotls.Client(pconn, tlsConfig), nil
},
TLSClientConfig: tlsSettings.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, streamSettings *internet.MemoryStreamConfig) (internet.Connection, error) {
httpSettings := streamSettings.ProtocolSettings.(*Config)
tlsConfig := tls.ConfigFromStreamSettings(streamSettings)
if tlsConfig == nil {
return nil, newError("TLS must be enabled for http transport.").AtWarning()
}
client, err := getHTTPClient(ctx, dest, tlsConfig)
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.ChainedClosable{breader, bwriter, response.Body}),
), nil
}
func init() {
common.Must(internet.RegisterTransportDialer(protocolName, Dial))
}
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