package v2rayhttp import ( "context" "net" "net/http" "os" "strings" "github.com/sagernet/sing-box/adapter" "github.com/sagernet/sing-box/common/tls" C "github.com/sagernet/sing-box/constant" "github.com/sagernet/sing-box/option" "github.com/sagernet/sing/common" E "github.com/sagernet/sing/common/exceptions" M "github.com/sagernet/sing/common/metadata" N "github.com/sagernet/sing/common/network" sHttp "github.com/sagernet/sing/protocol/http" "golang.org/x/net/http2" "golang.org/x/net/http2/h2c" ) var _ adapter.V2RayServerTransport = (*Server)(nil) type Server struct { ctx context.Context handler adapter.V2RayServerTransportHandler httpServer *http.Server h2Server *http2.Server h2cHandler http.Handler host []string path string method string headers http.Header } func (s *Server) Network() []string { return []string{N.NetworkTCP} } func NewServer(ctx context.Context, options option.V2RayHTTPOptions, tlsConfig tls.ServerConfig, handler adapter.V2RayServerTransportHandler) (*Server, error) { server := &Server{ ctx: ctx, handler: handler, h2Server: new(http2.Server), host: options.Host, path: options.Path, method: options.Method, headers: make(http.Header), } if server.method == "" { server.method = "PUT" } if !strings.HasPrefix(server.path, "/") { server.path = "/" + server.path } for key, value := range options.Headers { server.headers.Set(key, value) } server.httpServer = &http.Server{ Handler: server, ReadHeaderTimeout: C.TCPTimeout, MaxHeaderBytes: http.DefaultMaxHeaderBytes, } server.h2cHandler = h2c.NewHandler(server, server.h2Server) if tlsConfig != nil { stdConfig, err := tlsConfig.Config() if err != nil { return nil, err } server.httpServer.TLSConfig = stdConfig } return server, nil } func (s *Server) ServeHTTP(writer http.ResponseWriter, request *http.Request) { if request.Method == "PRI" && len(request.Header) == 0 && request.URL.Path == "*" && request.Proto == "HTTP/2.0" { s.h2cHandler.ServeHTTP(writer, request) return } host := request.Host if len(s.host) > 0 && !common.Contains(s.host, host) { s.fallbackRequest(request.Context(), writer, request, http.StatusBadRequest, E.New("bad host: ", host)) return } if !strings.HasPrefix(request.URL.Path, s.path) { s.fallbackRequest(request.Context(), writer, request, http.StatusNotFound, E.New("bad path: ", request.URL.Path)) return } if request.Method != s.method { s.fallbackRequest(request.Context(), writer, request, http.StatusNotFound, E.New("bad method: ", request.Method)) return } writer.Header().Set("Cache-Control", "no-store") for key, values := range s.headers { for _, value := range values { writer.Header().Set(key, value) } } writer.WriteHeader(http.StatusOK) writer.(http.Flusher).Flush() var metadata M.Metadata metadata.Source = sHttp.SourceAddress(request) if h, ok := writer.(http.Hijacker); ok { conn, _, err := h.Hijack() if err != nil { s.fallbackRequest(request.Context(), writer, request, http.StatusInternalServerError, E.Cause(err, "hijack conn")) return } s.handler.NewConnection(request.Context(), conn, metadata) } else { conn := NewHTTP2Wrapper(&ServerHTTPConn{ NewHTTPConn(request.Body, writer), writer.(http.Flusher), }) s.handler.NewConnection(request.Context(), conn, metadata) conn.CloseWrapper() } } func (s *Server) fallbackRequest(ctx context.Context, writer http.ResponseWriter, request *http.Request, statusCode int, err error) { conn := NewHTTPConn(request.Body, writer) fErr := s.handler.FallbackConnection(ctx, &conn, M.Metadata{}) if fErr == nil { return } else if fErr == os.ErrInvalid { fErr = nil } writer.WriteHeader(statusCode) s.handler.NewError(request.Context(), E.Cause(E.Errors(err, E.Cause(fErr, "fallback connection")), "process connection from ", request.RemoteAddr)) } func (s *Server) Serve(listener net.Listener) error { fixTLSConfig := s.httpServer.TLSConfig == nil err := http2.ConfigureServer(s.httpServer, s.h2Server) if err != nil { return err } if fixTLSConfig { s.httpServer.TLSConfig = nil } if s.httpServer.TLSConfig == nil { return s.httpServer.Serve(listener) } else { return s.httpServer.ServeTLS(listener, "", "") } } func (s *Server) ServePacket(listener net.PacketConn) error { return os.ErrInvalid } func (s *Server) Close() error { return common.Close(common.PtrOrNil(s.httpServer)) }