Initial commit

example_test.go

@@ -0,0 +1,81 @@
+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()
+}