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// +build !confonly
package http
import (
"context"
"io"
"net/http"
"strings"
"time"
"v2ray.com/core/common"
"v2ray.com/core/common/net"
"v2ray.com/core/common/serial"
"v2ray.com/core/common/session"
"v2ray.com/core/common/signal/done"
"v2ray.com/core/transport/internet"
"v2ray.com/core/transport/internet/tls"
"golang.org/x/net/http2"
"golang.org/x/net/http2/h2c"
)
type Listener struct {
server *http.Server
handler internet.ConnHandler
local net.Addr
config Config
}
func (l *Listener) Addr() net.Addr {
return l.local
}
func (l *Listener) Close() error {
return l.server.Close()
}
type flushWriter struct {
w io.Writer
d *done.Instance
}
func (fw flushWriter) Write(p []byte) (n int, err error) {
if fw.d.Done() {
return 0, io.ErrClosedPipe
}
n, err = fw.w.Write(p)
if f, ok := fw.w.(http.Flusher); ok {
f.Flush()
}
return
}
func (l *Listener) ServeHTTP(writer http.ResponseWriter, request *http.Request) {
host := request.Host
if !l.config.isValidHost(host) {
writer.WriteHeader(404)
return
}
path := l.config.getNormalizedPath()
if !strings.HasPrefix(request.URL.Path, path) {
writer.WriteHeader(404)
return
}
writer.Header().Set("Cache-Control", "no-store")
writer.WriteHeader(200)
if f, ok := writer.(http.Flusher); ok {
f.Flush()
}
remoteAddr := l.Addr()
dest, err := net.ParseDestination(request.RemoteAddr)
if err != nil {
newError("failed to parse request remote addr: ", request.RemoteAddr).Base(err).WriteToLog()
} else {
remoteAddr = &net.TCPAddr{
IP: dest.Address.IP(),
Port: int(dest.Port),
}
}
done := done.New()
conn := net.NewConnection(
net.ConnectionOutput(request.Body),
net.ConnectionInput(flushWriter{w: writer, d: done}),
net.ConnectionOnClose(common.ChainedClosable{done, request.Body}),
net.ConnectionLocalAddr(l.Addr()),
net.ConnectionRemoteAddr(remoteAddr),
)
l.handler(conn)
<-done.Wait()
}
func Listen(ctx context.Context, address net.Address, port net.Port, streamSettings *internet.MemoryStreamConfig, handler internet.ConnHandler) (internet.Listener, error) {
httpSettings := streamSettings.ProtocolSettings.(*Config)
listener := &Listener{
handler: handler,
local: &net.TCPAddr{
IP: address.IP(),
Port: int(port),
},
config: *httpSettings,
}
var server *http.Server
config := tls.ConfigFromStreamSettings(streamSettings)
if config == nil {
h2s := &http2.Server{}
server = &http.Server{
Addr: serial.Concat(address, ":", port),
Handler: h2c.NewHandler(listener, h2s),
ReadHeaderTimeout: time.Second * 4,
}
} else {
server = &http.Server{
Addr: serial.Concat(address, ":", port),
TLSConfig: config.GetTLSConfig(tls.WithNextProto("h2")),
Handler: listener,
ReadHeaderTimeout: time.Second * 4,
}
}
listener.server = server
go func() {
tcpListener, err := internet.ListenSystem(ctx, &net.TCPAddr{
IP: address.IP(),
Port: int(port),
}, streamSettings.SocketSettings)
if err != nil {
newError("failed to listen on", address, ":", port).Base(err).WriteToLog(session.ExportIDToError(ctx))
return
}
if config == nil {
err = server.Serve(tcpListener)
if err != nil {
newError("stoping serving H2C").Base(err).WriteToLog(session.ExportIDToError(ctx))
}
} else {
err = server.ServeTLS(tcpListener, "", "")
if err != nil {
newError("stoping serving TLS").Base(err).WriteToLog(session.ExportIDToError(ctx))
}
}
}()
return listener, nil
}
func init() {
common.Must(internet.RegisterTransportListener(protocolName, Listen))
}
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