package http import ( "context" "io" "net/http" "strings" "v2ray.com/core/common" "v2ray.com/core/common/net" "v2ray.com/core/common/serial" "v2ray.com/core/common/signal" "v2ray.com/core/transport/internet" "v2ray.com/core/transport/internet/tls" ) 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 *signal.Done } 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 := signal.NewDone() conn := net.NewConnection( net.ConnectionOutput(request.Body), net.ConnectionInput(flushWriter{w: writer, d: done}), net.ConnectionOnClose(common.NewChainedClosable(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, handler internet.ConnHandler) (internet.Listener, error) { rawSettings := internet.TransportSettingsFromContext(ctx) httpSettings, ok := rawSettings.(*Config) if !ok { return nil, newError("HTTP config is not set.").AtError() } listener := &Listener{ handler: handler, local: &net.TCPAddr{ IP: address.IP(), Port: int(port), }, config: *httpSettings, } config := tls.ConfigFromContext(ctx) if config == nil { return nil, newError("TLS must be enabled for http transport.").AtWarning() } server := &http.Server{ Addr: serial.Concat(address, ":", port), TLSConfig: config.GetTLSConfig(tls.WithNextProto("h2")), Handler: listener, } listener.server = server go func() { err := server.ListenAndServeTLS("", "") if err != nil { newError("stoping serving TLS").Base(err).WriteToLog() } }() return listener, nil } func init() { common.Must(internet.RegisterTransportListener(internet.TransportProtocol_HTTP, Listen)) }