package cmux_test import ( "fmt" "log" "net" "net/http" "net/rpc" "google.golang.org/grpc" "golang.org/x/net/context" grpchello "github.com/grpc/grpc-common/go/helloworld" "github.com/soheilhy/cmux" ) type exampleHTTPHandler struct{} func (h *exampleHTTPHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) { fmt.Fprintf(w, "example http response") } func serveHTTP(l net.Listener) { s := &http.Server{ Handler: &exampleHTTPHandler{}, } s.Serve(l) } type ExampleRPCRcvr struct{} func (r *ExampleRPCRcvr) Cube(i int, j *int) error { *j = i * i return nil } func serveRPC(l net.Listener) { s := rpc.NewServer() s.Register(&ExampleRPCRcvr{}) s.Accept(l) } type grpcServer struct{} func (s *grpcServer) SayHello(ctx context.Context, in *grpchello.HelloRequest) ( *grpchello.HelloReply, error) { return &grpchello.HelloReply{Message: "Hello " + in.Name + " from cmux"}, nil } func serveGRPC(l net.Listener) { grpcs := grpc.NewServer() grpchello.RegisterGreeterServer(grpcs, &grpcServer{}) grpcs.Serve(l) } func Example() { l, err := net.Listen("tcp", "127.0.0.1:50051") if err != nil { log.Fatal(err) } m := cmux.New(l) // We first match the connection against HTTP2 fields. If matched, the // connection will be sent through the "grpcl" listener. grpcl := m.Match(cmux.HTTP2HeaderField("content-type", "application/grpc")) // Otherwise, we match it againts HTTP1 methods and HTTP2. If matched by // any of them, it is sent through the "httpl" listener. httpl := m.Match(cmux.HTTP1Fast(), cmux.HTTP2()) // If not matched by HTTP, we assume it is an RPC connection. rpcl := m.Match(cmux.Any()) // Then we used the muxed listeners. go serveGRPC(grpcl) go serveHTTP(httpl) go serveRPC(rpcl) m.Serve() }