mirror of
https://github.com/SagerNet/sing-box.git
synced 2024-11-10 02:53:12 +00:00
121 lines
3.3 KiB
Go
121 lines
3.3 KiB
Go
package v2raygrpclite
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import (
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"context"
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"fmt"
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"net"
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"net/http"
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"net/url"
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"os"
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"strings"
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"github.com/sagernet/sing-box/adapter"
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"github.com/sagernet/sing-box/common/tls"
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"github.com/sagernet/sing-box/option"
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"github.com/sagernet/sing/common"
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E "github.com/sagernet/sing/common/exceptions"
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M "github.com/sagernet/sing/common/metadata"
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N "github.com/sagernet/sing/common/network"
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sHttp "github.com/sagernet/sing/protocol/http"
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"golang.org/x/net/http2"
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"golang.org/x/net/http2/h2c"
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)
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var _ adapter.V2RayServerTransport = (*Server)(nil)
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type Server struct {
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handler N.TCPConnectionHandler
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errorHandler E.Handler
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httpServer *http.Server
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h2Server *http2.Server
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h2cHandler http.Handler
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path string
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}
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func (s *Server) Network() []string {
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return []string{N.NetworkTCP}
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}
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func NewServer(ctx context.Context, options option.V2RayGRPCOptions, tlsConfig tls.ServerConfig, handler N.TCPConnectionHandler, errorHandler E.Handler) (*Server, error) {
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server := &Server{
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handler: handler,
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errorHandler: errorHandler,
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path: fmt.Sprintf("/%s/Tun", url.QueryEscape(options.ServiceName)),
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h2Server: new(http2.Server),
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}
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server.httpServer = &http.Server{
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Handler: server,
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}
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server.h2cHandler = h2c.NewHandler(server, server.h2Server)
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if tlsConfig != nil {
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stdConfig, err := tlsConfig.Config()
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if err != nil {
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return nil, err
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}
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if len(stdConfig.NextProtos) == 0 {
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stdConfig.NextProtos = []string{http2.NextProtoTLS}
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}
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server.httpServer.TLSConfig = stdConfig
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}
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return server, nil
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}
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func (s *Server) ServeHTTP(writer http.ResponseWriter, request *http.Request) {
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if request.Method == "PRI" && len(request.Header) == 0 && request.URL.Path == "*" && request.Proto == "HTTP/2.0" {
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s.h2cHandler.ServeHTTP(writer, request)
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return
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}
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if request.URL.Path != s.path {
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request.Write(os.Stdout)
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writer.WriteHeader(http.StatusNotFound)
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s.badRequest(request, E.New("bad path: ", request.URL.Path))
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return
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}
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if request.Method != http.MethodPost {
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writer.WriteHeader(http.StatusNotFound)
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s.badRequest(request, E.New("bad method: ", request.Method))
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return
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}
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if ct := request.Header.Get("Content-Type"); !strings.HasPrefix(ct, "application/grpc") {
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writer.WriteHeader(http.StatusNotFound)
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s.badRequest(request, E.New("bad content type: ", ct))
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return
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}
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writer.Header().Set("Content-Type", "application/grpc")
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writer.Header().Set("TE", "trailers")
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writer.WriteHeader(http.StatusOK)
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var metadata M.Metadata
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metadata.Source = sHttp.SourceAddress(request)
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conn := newGunConn(request.Body, writer, writer.(http.Flusher))
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s.handler.NewConnection(request.Context(), conn, metadata)
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}
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func (s *Server) badRequest(request *http.Request, err error) {
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s.errorHandler.NewError(request.Context(), E.Cause(err, "process connection from ", request.RemoteAddr))
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}
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func (s *Server) Serve(listener net.Listener) error {
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fixTLSConfig := s.httpServer.TLSConfig == nil
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err := http2.ConfigureServer(s.httpServer, s.h2Server)
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if err != nil {
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return err
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}
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if fixTLSConfig {
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s.httpServer.TLSConfig = nil
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}
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if s.httpServer.TLSConfig == nil {
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return s.httpServer.Serve(listener)
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} else {
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return s.httpServer.ServeTLS(listener, "", "")
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}
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}
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func (s *Server) ServePacket(listener net.PacketConn) error {
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return os.ErrInvalid
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}
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func (s *Server) Close() error {
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return common.Close(common.PtrOrNil(s.httpServer))
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}
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